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  • United States  (383)
  • Kinetics  (169)
  • Chemistry
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  • American Association for the Advancement of Science (AAAS)  (547)
  • Springer  (39)
  • 1980-1984  (586)
  • 1925-1929
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 260 (1982), S. 641-642 
    ISSN: 1435-1536
    Keywords: Kinetics ; Nucleation ; Water ; Emulsion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 262 (1984), S. 677-682 
    ISSN: 1435-1536
    Keywords: Kinetics ; methacrylamide ; reaction scheme ; viscosity ; additives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The aqueous polymerization of methacrylamide initiated by potassiumpersulfate-L-cystein hydrochloride redox system has been studied at 35±0.01
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  • 3
    ISSN: 1434-4475
    Keywords: Acetanilide ; Bromination ; Kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The kinetics of the bromination of acetanilide has been studied with the diffusion layer titration method. The results have been obtained using the apparatus which consists of the ring-disc electrode and an amperostat-potentiostat system. Dependence of the ring current on the disc current has been determined as a function of rotation speeds of the electrode, of the solution concentration and temperature. It has been shown the bromination reaction of acetanilide exhibits by first order kinetics. In that case Br2 and Br3 − are the brominating species. The rate of bromination changes with the concentration of the Br− ions. This reaction rate depends on reactions of molecular bromine with acetanilide. For 0.033〈[Br−]〈0.173M the rate constant changes in the following range: $$17530M^{ - 1} s^{ - 1}〈 k〈 6400M^{ - 1} s^{ - 1} ([H + ] = 1,34;T = 298K)$$
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  • 4
    ISSN: 1434-4475
    Keywords: Kinetics ; Mechanism ; Mononitrosopiperazine ; N-Nitrosation ; Piperazine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der Mechanismus der Bildung vonN-Nitroso-Verbindungen, die als potentielle carcinogene Substanzen gelten, wurde untersucht. Die Kinetik der Nitrosierung von Piperazin (PIP) in wäßriger Perchlorsäurelösung wurde mittels einer differentiellen spektrophotometrischen Methode verfolgt. Es ergab sich für denpH-Bereich 0,85–4,36 folgendes Zeitgesetz: $$v_0 = \left[ {nitrite} \right]_0 2 \left[ {PIP} \right]_0 /\left( {1 + f/\left[ {H^ + } \right]} \right)^2 \left( {g \left[ {PIP} \right]_0 + h + j\left[ {H^ \div } \right]} \right)$$ wobei [Nitrit]0 und [PIP]0 die anfänglichen stöchiometrischen Konzentrationen bedeuten. Bei 298,2 K und μ=1,0M,f=(1,17±0,11) 10−3 M,g=(3,5±0,7)·10−2 M s,h=2,6·10−6 M 2 s andj=(0,95±0,04)M s. Bei Erhöhung der Acidität ([HClO4]≥1M) tritt ein neuer kinetischer Term auf: $$v_0 ' = p\left[ {Nitrit} \right]_0 \left[ {PIP} \right]_0 $$ Bei 298,2 K und μ=3,0M,p=(1,9±0,2) 10−3 M −1 s−1. Es wird ein genereller Mechanismus für die Nitrosierung jedesN-nitrosierbaren Substrates in wäßriger Perchloratlösung vorgeschlagen, wobei als nitrosierende Agentien ausschließlich N2O3 und H2NO2 +/NO+ auftreten. Es werden die Besonderheiten dieses Mechanismus bezüglich derpK-Werte derN-nitrosierbaren Substrate diskutiert.
    Notes: Abstract The mechanism of formation ofN-nitroso compounds, which are considered as potential chemical carcinogens was studied. The kinetics of nitrosation of piperazine (PIP) in aqueous solution of perchloric acid have been investigated using a differential spectrophotometric technique. Based on our experimental results, the following rate law, in thepH-range 0.85 4.36, is proposed: $$v_0 = \left[ {nitrite} \right]_0 2 \left[ {PIP} \right]_0 /\left( {1 + f/\left[ {H^ + } \right]} \right)^2 \left( {g \left[ {PIP} \right]_0 + h + j\left[ {H^ \div } \right]} \right)$$ where [nitrite]0 and [PIP]0 represent initial stoichiometric concentrations. At 298.2K and μ=1.0M,f=(1.17±0.11) 10−3 M,g=(3.5±0.7) 10−2 M s,h=2.6×10−6 M 2 s andj=(0.95±0.04)M s. When the acidity is increased ([HClO4]≥1M), a new kinetic term comes into play: $$v_0 ' = p\left[ {nitrite} \right]_0 \left[ {PIP} \right]_0 $$ At 298.2 K and μ=3.0M,p=(1.9±0.2) 10−3 M −1 s−1. A general mechanism for the nitrosation of anyN-nitrosable substrate in aqueous perchloric solution in which the only nitrosating agents are N2O3 and H2NO2 +/NO+ is proposed. Also, the various particularities of this mechanism, according to thepK of theN-nitrosable substrate, are discussed.
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  • 5
    ISSN: 1434-4475
    Keywords: Galactitol ; Kinetics ; Mechanism ; Oxidation ; Reduction ; Xylitol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Das Geschwindigkeitsgesetz der Titelreaktion ist in beiden Fällen erster Ordnung bezüglich Hexacyanoferrat(III). Die Oxidation ist erster Ordnung bei niedrigen Konzentrationen von Xylit und Galaktit und geht bei Erhöhung der Konzentration gegen null. In gleicher Weise wurde eine Kinetik erster Ordnung bezüglich Hydroxyl bei niedrigen Konzentrationen und eine erniedrigte Ordnung bei höheren Konzentrationen für die Oxidation von Xylit beobachtet; bei Galaktit bleibt die Oxidation auch bei höheren Hydroxyl-Konzentrationen erster Ordnung. Es wird angenommen, daß die Reaktion über einen aktivierten Komplex zwischen [KFe(CN)6]2− und dem Substrat-Anion verläuft; dieser Komplex zerfällt in [KFe(CN)6]3− und ein Substrat-Radikal. Ein möglicher Reaktionsmechanismus wird vorgeschlagen.
    Notes: Abstract Kinetics of oxidation of xylitol and galactitol by hexacyanoferrate(III) ion in aqueous alkaline medium is reported. The reaction rate is of first order with respect to hexacyanoferrate(III) in each substrate. The reaction is first order at lower concentrations of xylitol and galactitol and tends towards zero order as the concentration increases. Similarly first order kinetics was obtained with respect to hydroxide ion at lower concentrations and tends to lower order at higher concentration in the oxidation of xylitol; in the oxidation of galactitol the reaction is first order with respect to hydroxide ion even up to manyfold variation. The course of reaction has been considered to proceed through the formation of an activated complex between [K Fe(CN)6]2− and substrate anion which decomposes slowly into radical and [K Fe(CN)6]3−. A probable reaction mechanism is proposed.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 112 (1981), S. 287-292 
    ISSN: 1434-4475
    Keywords: Activation energy ; Kinetics ; Methyl-vinyl ketone ; Polarography ; Polymerization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The homogeneous polymerization of methyl-vinyl ketone in diluted methanol solutions in presence of proton donors is studied using the polarographic method. The effect of the cation of the indifferent electrolyte is investigated as well as the influence of small quantities of H2O. Suggestions were made about the possible mechanisms of these influences in the general scheme of the process proposed byHolleck et al.
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  • 7
    Electronic Resource
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    Springer
    Monatshefte für Chemie 113 (1982), S. 1087-1092 
    ISSN: 1434-4475
    Keywords: Dissolution ; Kinetics ; Pyrrhotite ; Rotating disc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Auflösungsgeschwindigkeit von natürlichem monoklinen Pyrrhotin, FeS1.14, wurde in sauerstofffreien LösungenS([H+]=0.1, [Na+]=0.9, [ClO 4 − ]=1.0 mol kg−1) mit Hilfe der Methode der rotierenden Scheibe bestimmt. Im Temperaturbereich von 40–90° erfolgt die Auflösungsreaktion kinetisch kontrolliert, wobei eine Aktivierungsenergie von 14±1 kcal mol−1 (59±5 kJ mol−1) gefunden wurde.
    Notes: Abstract Using the rotating disc method, the rates of dissolution of natural monoclinic pyrrhotite, FeS1.14, in oxygen-free aqueous solutionsS([H+]=0.1, [Na+]=0.9, [ClO 4 − ]=1.0 mol kg−1) were determined. In the temperature range 40–90 °C the dissolution reaction occurs under kinetic control; the activation energy being 14±1 kcal mol−1 (50±5 kJ mol−1).
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 113 (1982), S. 1239-1244 
    ISSN: 1434-4475
    Keywords: Allyl alcohol ; Kinetics ; Mechanism ; Oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kinetik der Oxidation von Allylalkohol mitN-Bromsuccinimid (NBS) wurde bei 35 °C in wäßrigem Medium untersucht. Die Reaktion zeigt erste Ordnung gegenüberNBS und Allylalkohol. Bei relativ hoher Säurekonzentration zeigt sich keine Änderung der Reaktionsgeschwindigkeit, bei niedriger Säurekonzentration wird die Reaktionsgeschwindigkeit beträchtlich erhöht. Es wurde kein primärer Salzeffekt festgestellt. Bei varriierender Quecksilberacetatkonzentration bleibt die Reaktionsgeschwindigkeit gleich, bei Abwesenheit von Quecksilberacetat wird jedoch die Geschwindigkeitskonstante erhöht. Die kinetischen Parameter,E a, derArrheniusfaktorA, ΔH ≠, ΔG ≠ und ΔS ≠ wurden bestimmt. Ein Geschwindigkeitsgesetz in Übereinstimmung mit den experimentellen Befunden wurde abgeleitet und ein Mechanismus vorgeschlagen.
    Notes: Abstract The kinetics of oxidation of allyl alcohol byN-bromosuccinimide (NBS) has been studied at 35 °C in aqueous medium. The reaction shows first order dependence on bothNBS and allyl alcohol. In fairly high acid concentration, there is no change in the rate of the reaction but at low acid concentration, the rate is considerably enhanced. There is no primary salt effect. At varying mercuric acetate concentrations, the rate constant remains the same. But in the absence of mercuric acetate, the rate is enhanced. The kinetic parameters,E a,Arrhenius factorA, ΔH≠, ΔG≠ and ΔS≠ have been calculated. A rate law in agreement with experimental results has been derived. A mechanism is proposed.
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  • 9
    Electronic Resource
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    Springer
    Monatshefte für Chemie 113 (1982), S. 887-893 
    ISSN: 1434-4475
    Keywords: Diazotation ; Kinetics ; α-Naphthylamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Optimal diazotation conditions were determined by means of extinction measurements at various experimental conditions. The optimal conditions found arep H=9,5, the amount of phenol is 1 250 times the amount of α-naphthylamine.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 114 (1983), S. 773-781 
    ISSN: 1434-4475
    Keywords: Diastereomers ; 2,3-Dihydrobilatrienes-abc ; Kinetics ; Saturation-Transfer-Kinetics ; Phytochrome Models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract From kinetic and equilibrium measurements the activation and thermodynamic parameters of diastereomeric 2,3-dihydrobilatrienes-abc in positions “4” and “15” are deduced. Compared to bilatrienes-abc a pronounced thermal lability of these diastereomers is observed—the exocyclic double bond of the saturated lactam ring being the more labile one. This feature may be of relevance to the thermal cascades and dark reactions observed for phytochrome.
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  • 11
    ISSN: 1434-4475
    Keywords: Iodine monochloride ; Kinetics ; Solvent effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kinetik der Addition von ICl zu einigen Vinylverbindungen in Nitrobenzol als Lösungsmittel wurde untersucht. In allen Fällen ist die Reaktion von zweiter Ordnung hinsichtlich ICl und von erster Ordnung hinsichtlich des Substrats, d. h. mit einer Gesamtordnung von drei. Geschwindigkeitskonstanten wurden für jedes Substrat bei 20°, 30°, 40° und 50°C gemessen. AusArrhenius-Diagrammen wurden Aktivierungsenergien ermittelt und auch andere kinetische und thermodynamische Parameter wurden bestimmt. Ein Mechanismus wird vorgeschlagen, wobei die verschiedenen Parameter diskutiert werden. Lösungsmitteleffekte werden ebenfalls diskutiert und die Daten mit Nitrobenzol und Essigsäure als Lösungsmittel miteinander verglichen.
    Notes: Abstract The kinetics of the addition of iodine monochloride (ICl) to some vinyl compounds in nitrobenzene solvent was investigated. In all cases the reaction follows second order dependence on ICl and first order on the substrate, making the total order three. Rate constants were measured for each substrate at 20°, 30°, 40° and 50°C.Arrhenius plots were made from which activation energies were evaluated. Other kinetic and thermodynamic parameters are reported. A suitable mechanism is proposed for the reaction and based on this, the various parameters are discussed. Solvent effects are discussed and the data with nitrobenzene and acetic acid solvents are compared.
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  • 12
    Electronic Resource
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    Monatshefte für Chemie 115 (1984), S. 1185-1197 
    ISSN: 1434-4475
    Keywords: Mono and polycarboxylic esters ; Metal salt catalysis ; Kinetics ; Chromatographic analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The alcoholysis of various esters of aromatic carboxylic esters with octadecanol in the presence of lead stearate was investigated by chromatographic analysis of the reaction mixtures. The reactivity of the esters was found to be strongly affected by the substitution pattern of the aromatic nucleus as well as by the structure of the alkoxy group. Electron donating substituents in a suitable position lead to a remarkable increase in reactivity compared to the unsubstituted alkyl esters.
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  • 13
    ISSN: 1434-4475
    Keywords: Kinetics ; Negative salt effect ; Oxidation ; Stopped-flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The influence of NaClO4, NaCl and Na2SO4 on the oxidation of Fe(phen) 3 2+ by Ce(IV) was investigated by means of the stopped-flow method. At the concentrations range of NaClO4 and NaCl 0.1–1.0M the rate constant values decrease from 1.03·105 to 0.56·105M−1s−1 and from 1.08·105 to 0.81·105M−1s−1 respectively. In varying concentrations of Na2SO4 solutions (0.05–0.35M) the rate constant values decrease from 1.05·105M−1s−1 to 0.45·105M−1s−1. Taking into account the negative salt effect the mechanism of the reaction progress is proposed.
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  • 14
    ISSN: 1434-4475
    Keywords: Arginine ; Catalysis ; Kinetics ; Mechanism ; Oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Oxidation erfolgt sowohl mit als auch ohne Cu(II)-Katalysator in erster Ordnung bezüglich des Oxidationsmittels und des Substrats; inverse Ordnung wird bezüglich der Alkalikonzentration beobachtet. Bis zu einer Cu(II)-Konzentration von≤2×10−5 M ist die Geschwindigkeitskonstante der Katalysatorkonzentration proportional; darüber wird eine konstantbleibende Geschwindigkeit beobachtet, die nun von der Cu(II)-Konzentration unabhängig ist. Neutralsalze haben keinen Effekt auf die Geschwindigkeitskonstante. Es wird für den katalysierten und unkatalysierten Reaktionsablauf ein Mechanismus vorgeschlagen und ein mathematischer Ansatz präsentiert.
    Notes: Abstract The kinetics of uncatalysed and Cu(II) catalysed oxidation of arginine monohydrochloride was investigated. Both reactions follow a singular order dependence each in oxidant and substrate. An inverse order dependence is reported with the alkali concentration. A plot of observed rate constant versus Cu(II) concentrations Cu(II)≤2.0×10−5 M is linear; from the intercept the rate constant for the uncatalysed pathway was calculated. However, at high copper ion concentrations i.e. Cu(II)〉2.0×10−5 M a fixed value of rate constant was found for all catalyst concentrations. Added neutral salts show an insignificant effect on the reaction rate. Mechanisms were proposed for both cases and rate expressions were derived by applying steady state assumptions.
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  • 15
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    Calcified tissue international 33 (1981), S. 431-439 
    ISSN: 1432-0827
    Keywords: Apatite ; Fluorhydroxyapatite ; Crystal growth ; Kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary The kinetics of seeded crystal growth of calcium apatites were studied in dilute supersaturated solutions at various levels of fluoride concentrations. Initial precipitation rates were enhanced by fluoride concentrations higher than 0.05 ppm. The analytical results are consistent with the precipitation of fluoridated hydroxyapatites, Ca5Fx-(OH)1−x(PO4)3, FHA. The degree of fluoridation, X, appears to be determined by the activity of HF in solution, which varies for the various initial fluoride levels but remains fairly constant during precipitation. Thus the composition of the precipitating phase was the same for a given solution whether 25 or 10 mg of hydroxyapatite was added as seeds. All the experimental results are consistent with the BCF theory, which relates the mean linear rate of growth, RL, to the supersaturation, DS, by the expression RL=C1T(DS-1)1n(DS)tanh(C2/T 1n DS), in which DS is the supersaturation defined by mean molar activities with respect to the precipitating FHA, T the absolute temperature, and C1 and C2 are constants calculated from the experimental results. Consequently, the crystal growth appears to take place in surface kinks and to be controlled by surface diffusion. Since crystal growth in most biological systems takes place at fluoride concentrations within the experimental range used, it seems probable that it occurs along the model advanced in the present investigation.
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  • 16
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    Journal of molecular evolution 15 (1980), S. 79-101 
    ISSN: 1432-1432
    Keywords: Molecules ; Interstellar ; Chemistry ; Isotopes ; Solar system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The study of interstellar molecules broadly includes two areas of interest. One area uses the unique ability of molecules to act as probes of the physical conditions in the cold, dense, visually opaque component of the interstellar medium. The physical properties of this and other components of the interstellar medium are summarized. The other area deals with the chemistry of interstellar molecules, recent aspects of which are emphasized in this review. Gas-phase chemistry, shock chemistry, and grain surface chemistry are discussed in the context of recent observations. No present observations suggest that surface reactions are relevant, but neither can they be ruled out. Ion-molecule reactions are clearly operative, at least for the simpler species. Chemical isotope fractionation is reviewed, andd it is concluded that the complexities of the chemistry allow no cosmological conclusions to be drawn from observations of deuterium in interstellar molecules, while the presence of13C in interstellar molecules permits an estimate of the12C/13C ratio which is consistent with the current concepts of the nucleosynthesis history of the Galaxy. Possible connections between interstellar molecules and the early molecular history of the solar system are discussed.
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  • 17
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    Monatshefte für Chemie 111 (1980), S. 1125-1133 
    ISSN: 1434-4475
    Keywords: Diazotization ; Kinetics ; α-Naphthylamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The kinetics of the diazotization of α-naphthylamine1 in water HCl solution from 0,2N to 2.0N at 0 °C were investigated. It was found that the nitrosation reaction $$\alpha --C_{10} H_7 NH_2 + NOCl\mathop \rightleftharpoons \limits^{k_v } \alpha --C_{10} H_7 NH_2 NO^ + + Cl^ - $$ is a preceeding advance-back-reaction (velocity coefficient of the nitrosation is 1.92·1010l mol−1 s−1). The decomposition of I by splitting off a proton is the rate determining reaction. The free enthalpy of activation for the nitrosation reaction equals 12.94 kJ/mol.
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  • 18
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    Monatshefte für Chemie 111 (1980), S. 1135-1142 
    ISSN: 1434-4475
    Keywords: Hammet parameter ; Kinetics ; Mechanism ; Thermodynamic parameters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kinetik der Reaktion von drei substituierten Acetophenonen mit Bromsuccinimid in Perchlorsäure in Gegenwart von Quecksilberacetat wurde untersucht. Die Reaktion war von nullter Ordnung gegenüberNBS, erster Ordnung gegenüber den Ketonen und [H+]. Mögliche Mechanismen der Reaktion werden diskutiert und auch eine Geschwindigkeitsgleichung wird abgeleitet. Es wurden die thermodynamischen Parameter der Reaktion bestimmt und auch einHammet'scher ϖ-Wert (+0,6) für die Oxidation der Methylarylketone ermittelt.
    Notes: Abstract The kinetics of the reaction of three substituted acetophenones withN-Bromosuccinimide was studied in perchloric acid media in presence of mercuric acetate. The reactions were found to be zero order with respect toNBS while the order with respect to ketones and [H+] was found to be unity. The addition of succinimide mercuric acetate and sodium perchlorate has no effect on the rate of oxidation and the rate increases with the decrease in dielectric constant of the medium. Kinetic investigations have revealed that the order of reactivity ism-nitroacetophenone 〉 p-chloroacetophenone 〉 p-methylacetophenone. TheArrhenius equation has been found to be valid in the temperature range 35–55°. Thermodynamic parameters have been calculated. Mechanistic pathways of the reactions are discussed and a rate equation is derived.Hammett's plot gives a ϖ value of +0.60 for methyl-aryl-ketones.
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  • 19
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    Monatshefte für Chemie 113 (1982), S. 3-14 
    ISSN: 1434-4475
    Keywords: Graphite ; Kinetics ; Reduction ; Thoria ; Thoriumcarbide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reduktion von Thoriumoxid mit Graphit im Überschuß wurde mittels einer Thermowaage zwischen 1620 und 1920 K im Vakuum untersucht. Ab ThO2:C=1:50 war die Reaktionsgeschwindigkeit vom Mischungsverhältnis unabhängig; das Endprodukt war immer ThC2. Der logarithmische Gewichtsverlust war direkt proportional der Zeit, und dieArrheniusgerade zeigte einen Knickpunkt bei 1710 K: unterhalb dieser Temperatur ergab sich eine Aktivierungsenergie von 440 kJ, oberhalb eine solche von 260 kJ. Die Temperatur des Knickpunkts entspricht der Umwandlungstemperatur von monoklinem in tetragonal raumzentriertes ThC2.
    Notes: Abstract The reduction of thoria with excess graphite was studied with a thermo-balance in vacuum between 1620 and 1920 K. From Th02:C=1:50 the rate of reaction was independent of the ratio of the reactants; the endproduct was always ThC2. The logarithmic weight loss was directly proportional to the time, and theArrhenius plot showed a break at 1710 K: below this temperature the activation energy was found to be 440 kJ, above 260 kJ. The temperature corresponding to the break coincides with the transition temperature of monoclinic to body-centered tetragonal ThC2.
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  • 20
    ISSN: 1434-4475
    Keywords: Kinetics ; Ligand-transfer ; Thallium (III)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The transfer of oxinate ions from thallium (III)oxinate to trivalent Fe(DMF) 6 3+ in propylenecarbonate takes place via rearrangements within a rapidly formed binuclear thallium(III)—iron(III) complex. In a last rapid step this rearranged complex reacts with excess reactants to the final products whose composition accordingly depends on the ratio of the reactant concentrations.
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  • 21
    ISSN: 1434-4475
    Keywords: Hydroperoxide ; Kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bei der Zersetzung von α,α-Dimethylbenzylhydroperoxid (1) unter Verwendung eines Kupfer(II)chlorkomplexes wurde die neue Feststellung gemacht, daß das Produktverhältnis Acetophenon (2): α,α-Dimethylbenzylalkohol (3) stets 2:1 ist. Die Kinetik der Reaktion wurde untersucht und ein Mechanismus vorgeschlagen, der mit dem experimentellen Resultat konsistent ist.
    Notes: Abstract In the decomposition of α,α-dimethylbenzyl hydroperoxide (1) by use of copper(II) chlorocomplexes, the novel fact was found that the product ratio of acetophenone (2) to α,α-dimethylbenzyl alcohol (3) is 2 to 1. The kinetics of this result was investigated and a mechanism consistent with the experimental result is proposed.
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  • 22
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    Monatshefte für Chemie 114 (1983), S. 411-423 
    ISSN: 1434-4475
    Keywords: Bromination ; Dihydroxydiphenylmethanes ; Intramolecular hydrogen bonding ; Kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The bromination of 15 dinuclear phenolic compounds (dihydroxydiphenylmethanes, methylene bisphenols) by molecular bromine in acetic acid was studied kinetically at 22°C. In all compounds the electrophilic substitution occurred inortho-position to the phenolic hydroxy group of the methyl phenol unit while the non reacting neighboring unit was differently substituted by H, CH3,t-Bu and NO2. A decrease in the reaction rate was observed in 2,2′-dihydroxydiphenylmethanes, where the +M-effect of the hydroxy group is diminished by an intramolecular hydrogen bond. The strength of this hydrogen bond may be influenced mainly by steric factors. Strong electron withdrawing substituents like NO2 show a rate decreasing influence on the reactivity of the neighboring unit also in 2,4′- and 4,4′-dihydroxydiphenylmethanes.
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    Monatshefte für Chemie 115 (1984), S. 1385-1392 
    ISSN: 1434-4475
    Keywords: Periodate oxidation ; Solvent effect ; Reaction rate ; Kinetics ; Octacyanomolybdate (IV)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kinetik der Oxidation von Mo(CN) 8 4− mit IO4/− wurde in Ethanol—Wasser über einen Temperaturbereich von 15–35 °C untersucht. Der Effekt der Lösungsmittelzusammensetzung auf die Reaktionsgeschwindigkeit und der Mechanismus der Reaktion werden diskutiert. Die Aktivierungsparameter sind angeführt. Es wird ein „Inner-Sphere“-Mechanismus vorgeschlagen, der mit den kinetischen Ergebnissen konsistent ist.
    Notes: Abstract The kinetics of the oxidation of Mo(CN) 8 4− by IO 4 − has been studied in ethanol—water solvent mixtures over a temperature range of 15–35 °C. The effect of solvent composition on the reaction rate and the mechanism has been investigated. Activation parameters are given. An inner-sphere mechanism, consistent with the kinetic results, is proposed.
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    Monatshefte für Chemie 115 (1984), S. 405-414 
    ISSN: 1434-4475
    Keywords: Kinetics ; Mechanism ; Oxidation
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    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurde die Kinetik der Oxidation von Chinol mit Quecksilbernitrat in Gegenwart einer Mischung ausAcOH-H2O-HNO3 untersucht, um die aktive Species bei der Oxidation in diesem Medium aufzuklären. Die Reaktionsordnung ist sowohl bezüglich des Chinols als auch des Hg(II)-Ions erster Ordnung. Die Reaktionsgeschwindigkeit erhöht sich leicht mit der HNO3-Konzentration und auch mit abfallender Dielektrizitätskonstante des Mediums. Die Reaktionsgeschwindigkeit sinkt mit dem Zusatz von KNO3. Es ist keinerlei Hinweis auf eine Komplexbildung zwischen Chinol und Hg(II) festzustellen. Die Resultate der Untersuchungen legen HgNO + 3 als aktive Spezies nahe. Es wird ein möglicher Mechanismus mit einem Zweielektronen-Transfer im geschwindigkeitsbestimmenden Schritt vorgeschlagen. Das dabei produziertep-Benzochinon existiert nicht in freier Form, sondern es bildet einen stabilen 1 : 1-Komplex mit Quecksilbernitrat; dieser Komplex wurde mittels TLC und IR charakterisiert.
    Notes: Abstract The kinetics of oxidation of quinol by mercuric nitrate in presence ofAcOH-H2O-HNO3 mixture has been investigated in order to find the active species of mercuric nitrate involved in the oxidation in this medium. The order of reaction both with respect to quinol and Hg(II) is found to be one. The reaction rate slightly increases with the increase in [HNO3] and the decrease of the dielectric constant of the medium. The reaction rate retards on addition of KNO3. There is no evidence for complex formation between quinol and Hg(II). These results suggest that HgNO + 3 might be the active species in this medium. A probable mechanism involving a two electron transfer in the rate determining step has been suggested. The producedp-benzoquinone does not exist in free state but forms a stable (1 : 1) complex with mercuric nitrate which has been characterized by TLC and IR studies.
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    Monatshefte für Chemie 115 (1984), S. 697-704 
    ISSN: 1434-4475
    Keywords: Electrohydrodimerization ; Benzylidenemalononitriles ; Kinetics ; Electrohydrodimerization ; Benzylidenemalononitriles ; Kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels derivativer cyclischer Voltammetrie wurden für die Titelreaktion Geschwindigkeitskonstanten und Aktivierungsparameter erhalten (Dimethylformamid als Lösungsmittel). Benzyliden-,p-Methyl- undp-Methoxybenzylidenmalonnitril reagieren ausschließlich über die Dimerisierung ihrer Anionenradikale (Radikal-Radikal-Kopplung), währenddessen die Dimerisierung vonp-Fluorbenzylidenmalonnitril zu 25% über die Kopplung des Anionenradikals mit dem Substrat erfolgt.
    Notes: Abstract Rate constants and activation parameters for the reductive dimerization of substituted benzylidenemalononitriles were obtained from derivate cyclic voltammetry measurements in dimethylformamide as solvent. Benzylidene-,p-methyl-andp-methoxybenzylidenemalononitrile react exclusively via dimerization of their anion radicals (radical-radical coupling) while forp-fluorobenzylidenemalononitrile 25% of the dimerization proceeds by coupling of the anion radical with the substrate.
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    Pure and applied geophysics 118 (1980), S. 128-151 
    ISSN: 1420-9136
    Keywords: Galactic cosmic rays ; Solar proton events ; Particle precipitation ; Chemistry
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    Topics: Geosciences , Physics
    Notes: Abstract An assessment is made of the relative contribution of certain classes of energetic particle precipitation to the chemical composition of the middle atmosphere with emphasis placed on the production of odd nitrogen and odd hydrogen species and their subsequent role in the catalytic removal of ozone. Galactic cosmic radiation is an important source of odd nitrogen in the lower stratosphere but since the peak energy deposition occurs below the region where catalytic removal of O3 is most effective, it is questionable whether this mechanism is important in the overall terrestrial ozone budget. The precipitation of energetic solar protons can periodically produce dramatic enhancement in upper stratospheric NO. The long residence time of NO in this region of the atmosphere, where catalytic interaction with O3 is also most effective, mandates that this mechanism be included in future modelling of the global distribution of O3. Throughout the mesosphere the precipitation of energetic electrons from the outer radiation belt (60°≲Λ≲70°) can sporadically act as a major local source of odd hydrogen and odd nitrogen leading to observable O3 depletion. Future satellite studies should be directed at simultaneously measuring the precipitation flux and the concomitant atmosphere modification, and these results should be employed to develop more sophisticated models of this important coupling.
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  • 27
    ISSN: 1432-0827
    Keywords: Bacterial amphophile ; Purification ; Chemistry ; Resorption ; Ca influx ; Cyclic AMP
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    Topics: Biology , Medicine , Physics
    Notes: Summary The bone resorptive factor and amphipathic antigen (AcA) previously identified by us in preparations fromActinomyces viscosus have been partially purified, characterized chemically, and compared. They elute at the same location on chromatography with Ac 22. The fatty acid composition of AcA and the bone resorptive factor is the same. Some differences in carbohydrate composition are observed. TheActinomyces factor does not affect calcium influx or cyclic AMP in isolated bone cells. Therefore it is concluded that AcA stimulates resorption either by gaining entrance into bone cells or by way of a yet undetermined second messenger.
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    Calcified tissue international 36 (1984), S. 48-59 
    ISSN: 1432-0827
    Keywords: Salivary proteins ; Adsorption ; Thermodynamics ; Kinetics ; Hydroxyapatite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Equilibrium and kinetic experiments were conducted to investigate the factors determining the adsorption of salivary macromolecules onto hydroxyapatite. Using amino acids and other small adsorbates, it was determined that the carboxyl attached to the α carbon does not appear to adsorb onto HA and the affinities of side-chain carboxyls are much smaller than that of the phosphate group (phosphoserine). Hydroxyl (serine) displays an extremely high affinity, but its adsorption site on HA is different and the number of such sites is much smaller than found for the rest of the functional groups investigated. It is shown that the information obtained from small molecules cannot be readily applied to prediction of the adsorption behavior of salivary macromolecules and polypeptides. The kinetics of adsorption of the salivary phosphopeptide statherin, a polyaspartate, and the salivary prolinerich phosphoprotein PRP3 are consistent with the reversibility of the adsorption process; no conclusion was possible in the case of the protein PRP1. Apparent irreversibility cannot be explained on the basis of multipoint binding or the properties of the carboxyl versus phosphate group; it appears that secondary structure determines to a significant extent the adsorption properties of the macromolecules. Calculation of the thermodynamic molar quantities of adsorption of PRP1, PRP3, andl-ASP onto HA showed that the process is entropically driven. The functional relationship between partial molar entropy and adsorption coverage is similar for the two proteins, but quite different from that for aspartate. Explanations for these results are advanced on the bases of changes in structure configurations and displacement of water from the adsorbate and the adsorbent surface, the second factor being the dominant one in the adsorption of a small molecule such asl-ASP.
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    European biophysics journal 8 (1981), S. 23-34 
    ISSN: 1432-1017
    Keywords: Light-scattering ; Flash photometry ; Kinetics ; Visual transduction ; Biomembranes
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    Topics: Biology , Physics
    Notes: Abstract A recent development of kinetic light-scattering and -absorption photometry is described. Essential points are: 1) In the scattering experiment, amplitude resolution of 2 · 10−5 (single flash) by application of a differential detector, stability of the same magnitude due to optical compensation, high intensity at the detector due to special optics for the scattered light and semiconductor sources. 2) In the absorption measurement, elimination of scattering contributions by the dual wavelength-method and by high aperture optics. 3) Simultaneous measurement of absorption and scattering. The application of the method is described in using signals from isolated bovine rod outer segments. A reliable procedure is described by the use of which the originally measured light-scattering effects can be split up into single signals. The method allows comparative kinetic analysis of absorption and scattering signals. The possible causal connections between pigment and membrane structure processes can be selected.
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    European biophysics journal 9 (1983), S. 145-170 
    ISSN: 1432-1017
    Keywords: Viroids ; Thermodynamics ; Kinetics ; Hydrodynamics ; Function
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    Topics: Biology , Physics
    Notes: Abstract Viroids are an independent class of plant pathogens which are distinguished from viruses by the absence of a protein coat and by their unusually small size. They are single-stranded circular RNAs composed of about 360 nucleotide residues. Sequence analysis and physicochemical studies of the potato spindle tuber viroid (PSTV) have shown that, as a result of intra-molecular base pairing, viroids form a unique rod-like secondary structure which is characterized by a serial arrangement of double-helical sections and internal loops. There is no indication for an additional tertiary structure because all parts of the molecule are freely accessible to ligand interaction. During the denaturation all of the native base pairs of viroids are dissociated in one highly cooperative transition, and in the same process very stable hairpins which are not present in the native structure are newly formed. Most of the properties of the structure and structural transitions of PSTV have been found also in citrus exocortis viroid, chrysanthemum stunt viroid and four different viroid-like RNAs associated with the cadang-cadang disease. The close similarity between these viroids is more expressed in the overall structure and in thermodynamic and functional domains than in the primary sequence. The stiffness of all viroids can be described by an unique persistence length of 300 å. Characteristically, regions of premelting, regions of stable hairpins, and the sequence UACUACCCGGUGG which is opposite to one of the stable hairpins, are the most conservative sequences in the molecules. Current hypotheses about the function of viroids are discussed on the basis of their structural and thermodynamic features. The suggestion that viroid RNA has features similar to DNA has been supported by the finding that they are replicated in vitro by the DNA-dependent RNA polymerase II of the host plant. The highly conserved sequence in viroids mentioned above corresponds very closely to a segment at the 5′-end of the small nuclear RNA U1 of eukaryotes. Because this segment is discussed in recent models, to be involved in the splicing process, a hypothesis is proposed in which viroids interfere with the splicing process leading to a pathogenic misregulation of mRNA processing.
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    Archives of microbiology 139 (1984), S. 28-32 
    ISSN: 1432-072X
    Keywords: Cyanobacterium ; Phosphate ; Uptake ; Kinetics ; Regulation ; Pulse ; Steady state
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    Topics: Biology
    Notes: Abstract In order to study phosphate uptake kinetics the cyanobacteriumOscillatoria agardhii was grown in continuous culture under a phosphorus limitation. The affinity of the uptake system reflected in the initial slope of the uptake rate versus external substrate concentration curve (dV/ds) was found to be unaffected by the growth wate. The maximum phosphate uptake rate (V m ) decreased as the growth rate was increased. Attempts were made to relate the decrease ofV m to the increase in phosphorus content of the cells that occurred a higher growth rates. Accumulation of phosphate during pulse experiments indeed resulted in a decrease ofV m . However feedback regulation ofV m by accumulated phosphorus was found to occur only to a small extent in steady state growing cells. The main part of the regulation of the activity of the phosphate uptake system seemingly is determined by a long term process that is, at least longer than 2 h. The presence of short term feedback inhibition by accumulated phosphorus on the activity of the uptake system provides an explanation of the phenomenon thatOscillatoria agardhii is not able to grow at nearμ max growth rates under a phosphorus limitation.
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    Plant and soil 54 (1980), S. 359-381 
    ISSN: 1573-5036
    Keywords: Alaska ; Ammonium ; Birch ; Forest-floor ; Isotopedilution ; Kinetics ; Nitrate ; Nitrogen pool
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary An analysis was conducted of nitrogen dynamics in the forest floor of a paper birch forest in subarctic Alaska. Low addition levels of high enrichment isotope (〈1% of the total nitrogen pool with 95 to 99 atom percent excess15N) and isotope dilution analysis, were used to establish the kinetics of nitrogen flow. The pools examined were NH4, NO3+NO2, soluble organic-N and forest floor organic matter. This approach allows a more realistic assessment of rates of N movement at the levels of nitrogen concentration encountered in natural systems.
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    Plant and soil 54 (1980), S. 399-417 
    ISSN: 1573-5036
    Keywords: Adsorption ; Anodic stripping voltammetry (ASV) ; Kinetics ; Lead ; River-mud
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effects of several factors on the rate and the capacity of lead adsorption by river-mud were studies. These factors included the concentration of mud, the concentration of lead, the organic matter content of mud, pH, time of adsorption, temperature and agitation. The reaction order of the adsorption process with respect to lead and the type of adsorption were determined. Also, indications of the rate-limiting step were discussed and an empirical equation describing the adsorption of lead on river-mud was developed.
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  • 34
    ISSN: 1573-5036
    Keywords: Ammonification ; Cadmium ; Heavy metals ; Kinetics ; Lead ; Nitrification ; Perfusion incubations ; Polluted soils ; Selection ; Toxicity ; Zinc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The sensitivity of the mineralization of nitrogen by a range of soils contaminated with heavy metals (up to 340 μg Cd g−1, 7500 μg Pb g−1 and 34000 μg Zn g−1) to the addition of heavy metals in solution were studied using pot incubations (ammonification) and a soil perfusion technique (nitrification). The ammonification of peptone showed little correlation between treatments with Cd, Zn (1000 and 5000 μg g−1) and Pb (10000 and 20000 μg g−1) and origin of the soil. Nitrification was considerably more sensitive to heavy metals than ammonification. All the soils had active, often large, populations of ammonifying and nitrifying organisms which showed substantial similarities between the soils. The rate of nitrifying activity (NO3−N production) was logrithmic in most cases. The presence of tolerant populations of nitrifying organisms in the contaminated soils was demonstrated. Tolerance was also eventually acquired after a longer lag phase, by the non-contaminated soil populations although the rate of activity was often reduced. Metals added in solution were adsorbed by the soil within 4 hours. Differences in toxicity between metal salts (chlorides, sulphates and acetate) were attributed to the amount left in solution. However, in many instances, acetate was found to stimulate all the stages in the mineralisation of nitrogen.
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    Hydrobiologia 106 (1983), S. 37-41 
    ISSN: 1573-5117
    Keywords: carp ; aquatic vegetation ; enclosure experiment ; Southern France ; United States
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The destruction of submerged vegetation by common carp, Cyprinus carpio L. is tested in six enclosures with different biomass (kg ha−1) of carp in a marsh of the Camargue, southern France. After 71 days, a strong negative relationship was found between the biomass of carp and the amount of aquatic vegetation present in the enclosures. The results are compared with similar studies in the United States. The absence of problem of vegetation destruction by carp in Europe, in contrast to North America, may be explained by lower biomass of these populations in Europe, and by a higher weight of carp in North America.
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    Hydrobiologia 112 (1984), S. 27-39 
    ISSN: 1573-5117
    Keywords: benthic macroinvertebrates ; colonization ; succession ; reservoir ; impoundment ; mainstream ; United States ; Southeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The purpose of this study was to examine the colonization and succession of benthic macroinvertebrates in shallow areas (〈7 m) of Lake Anna, a new mainstream impoundment in the southeastern U.S.A. Benthic macroinvertebrates were sampled for the first three years after filling by means of artificial substrates placed on the bottom and retrieved with SCUBA. Lake Anna was well colonized by benthic macroinvertebrates during the summer season immediately after impoundment. The total density of organisms increased in each of the first three years. Major changes in the fauna occurred between the first and second years, but the changes between the second and third years were more subtle. The fauna could be divided into two distinct groups based upon the time when the organisms were most consistently abundant. The first colonizers appeared to be dependent upon the components of the former terrestrial ecosystem for food and habitat. As autochthonous factors began to regulate succession, diversity increased and the dominant species shifted to an assemblage of second colonizers. These factors included: (1) decomposition of terrestrial vegetation and detritus leaving bare substrate, (2) sedimentation, (3) improved food quality of the organic matter in the sediment because of ingestion and egestion by the organisms themselves, (4) increased plankton populations, and (5) appearance of macrophytes. As the second colonizers became firmly established in the third year, distinct patterns of spatial distribution began to appear among species with similar niches.
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    Journal of statistical physics 30 (1983), S. 219-241 
    ISSN: 1572-9613
    Keywords: Kinetics ; phase transitions ; nucleation ; lattice gas ; Becker-Doring equations ; clusters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A method is described for calculating from first principles the coefficients in the Becker-Döring equations for the rate of change of the distribution of cluster sizes in a low-density lattice gas with Kawasaki dynamics. The method depends on solving a diffusion problem for the concentration of particles near a given cluster. The coefficients are calculated for cluster sizes up to 6, on a simple cubic lattice at a temperature 0.59 times the critical temperatures, and extrapolated to larger sizes. The resulting version of the Becker-Doring equations is then solved numerically. Comparison with the results of a computer simulation (at overall concentration 0.075) carried out by Kalos and others indicates that the method gives quite good predictions of the dependence of the cluster distribution on the critical cluster size (usually denoted by l*) but that the predicted rate of change of critical cluster size with time is too small, at this overall concentration, by a factor of about 0.3.
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    Journal of statistical physics 34 (1984), S. 399-426 
    ISSN: 1572-9613
    Keywords: Kinetics ; Becker-Doring equations ; clusters ; computer simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We make a quantitative comparison between the predictions of the Becker-Döring equations and computer simulations on a model of a quenched binary A-B alloy. The atoms are confined to the vertices of a simple cubic lattice, interact through attractive nearest neighbor interactions, and move by interchanges of nearest neighbor pairs (Kawasaki dynamics). We study in particular the time evolution of the number of clusters of A atoms of each size, at four different concentrations: ρA=0.035, 0.05, 0.075, and 0.1 atoms per lattice site. The temperature is 0.59 times the critical temperature. At this temperature the equilibrium concentration of A atoms in the B-rich phase is ρ A eq =0.0145 atoms/lattice site. The coefficients entering the Becker-Döring equations are obtained by extrapolation from previously published low-density calculations, leaving the time scale as the only adjustable parameter. We find good agreement at the three lower densities. At 10% density the agreement is, as might be expected, less satisfactory but still fairly good-indicating a quite wide range of utility for the Becker-Döring equations.
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  • 39
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    Plant and soil 54 (1980), S. 33-44 
    ISSN: 1573-5036
    Keywords: Acetylene reduction ; Harwood forests ; Nitrogen cycle ; Nitrogen fixation ; United States ; Wood litter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Nitrogen-fixing activity in hardwood forests of the northeastern United States occurred in wood litter, greater than 2 cm in diameter. Activity in large dead wood was independent of species, in the case of deciduous wood litter, but was restricted to partially decayed wood with a high moisture content. Maximum rates of activity were observed in the summer months, minimum rates in the winter. Evidence from six stands of varying ages showed that fixation in large wood litter occurred in only 25% of the samples assayed. Fixation was highest in the youngest, 4 years, and oldest, over 200 years, stands; being about 2 kg/ha/yr. The quantity of nitrogen fixed appears to be related to the biomass of dead wood. Large amounts of wood litter in the youngest stands were from slash left after cutting. As the supply of slash is exhausted by decay, nitrogen fixation decreases, with a low around year 20. Fixation then gradually increases as natural thinning adds wood to the litter compartment. Apparently, the amount of nitrogen fixed in dead wood the first 20 years following clearcutting can only replace a modest fraction of the amount lost as a result of the cutting and product removal. Finally, the results indicate that nitrogen fixation in wood litter does not equal nitrogen fixation in a northern hardwood forest calculated using a mass balance approach, suggesting that additional nitrogen inputs exist.
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    Publication Date: 1980-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉New York, N.Y. -- Science. 1980 Sep 26;209(4464):1497-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433971" target="_blank"〉PubMed〈/a〉
    Keywords: Budgets ; Legislation as Topic ; *National Institutes of Health (U.S.) ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Publication Date: 1980-04-04
    Description: The rapid advances in computer and communication technology in the 1970's have enabled large interactive scientific and technical information retrieval systems to be implemented. Major search services today offer on-line access to millions of bibliographic citations and an increasing number of "electronic handbooks." In addition, development of knowledge bases is well under way. Despite the impressive speed and flexibility of interactive retrieval systems, their impact has been lessened by limited awareness of their existence, uneven quality of retrieval, inadequate linkages among data bases, and reliance on specially trained intermediaries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Doszkocs, T E -- Rapp, B A -- Schoolman, H M -- New York, N.Y. -- Science. 1980 Apr 4;208(4439):25-30.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6987735" target="_blank"〉PubMed〈/a〉
    Keywords: *Computers ; History, 20th Century ; *Information Systems ; MEDLARS/history ; *National Library of Medicine (U.S.) ; *Science ; *Technology ; United States
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    Publication Date: 1980-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Eisenbud, M -- New York, N.Y. -- Science. 1980 Mar 21;207(4437):1299.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355289" target="_blank"〉PubMed〈/a〉
    Keywords: Hospitals ; Laboratories ; Medical Waste ; *Radioactive Waste ; United States
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  • 43
    Publication Date: 1980-03-28
    Description: When microbial strains compete for the same limiting nutrient in continuous culture, resource-based competition theory predicts that only one strain will survive and all others will die out. The surviving strain expected from theory will be the one with the smallest subsistence or "break-even" concentration of the limiting resource, a concentration defined by the J parameter. This prediction has been confirmed in the case of auxotrophic bacterial strains competing for limiting tryptophan. Because the value of J can be measured on the strains grown alone, the theory can predict the qualitative outcomes of mixed-growth competition in advance of actual competition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, S R -- Hubbell, S P -- New York, N.Y. -- Science. 1980 Mar 28;207(4438):1491-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6767274" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*growth & development ; Culture Media ; Drug Resistance, Microbial ; Escherichia coli/growth & development ; Kinetics ; Models, Theoretical ; Nalidixic Acid/pharmacology ; Nutritional Physiological Phenomena ; Pseudomonas aeruginosa/growth & development ; Tryptophan/metabolism
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    Publication Date: 1980-01-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1980 Jan 11;207(4427):160-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6985747" target="_blank"〉PubMed〈/a〉
    Keywords: Hospices/*economics ; Humans ; Insurance, Health ; Medicaid ; Medicare ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marston, R Q -- New York, N.Y. -- Science. 1980 Nov 14;210(4471):721.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7433994" target="_blank"〉PubMed〈/a〉
    Keywords: Legislation as Topic ; *National Institutes of Health (U.S.) ; *Research Support as Topic ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 46
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Knox, R A -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):570-2, 574-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6994226" target="_blank"〉PubMed〈/a〉
    Keywords: Boston ; Cardiac Surgical Procedures/*economics ; *Federal Government ; Government Agencies ; Government Regulation ; *Heart Transplantation ; Hospitals, General ; Humans ; *Patient Selection ; *Resource Allocation ; Transplantation, Homologous ; United States
    Print ISSN: 0036-8075
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  • 47
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Oct 31;210(4469):518-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7423201" target="_blank"〉PubMed〈/a〉
    Keywords: Abnormalities, Drug-Induced/*etiology ; Dicyclomine ; Doxylamine/*adverse effects ; Drug Combinations/adverse effects ; Drug Evaluation ; Female ; Humans ; Jurisprudence ; Pregnancy ; Pyridines/*adverse effects ; Pyridoxine/*adverse effects ; United States ; United States Food and Drug Administration
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-09-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Sep 12;209(4462):1216-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6157193" target="_blank"〉PubMed〈/a〉
    Keywords: Abortion, Therapeutic/standards ; Female ; Genetic Diseases, Inborn ; Government Regulation ; Great Britain ; Humans ; Neural Tube Defects/*diagnosis ; Pregnancy ; *Pregnant Women ; *Prenatal Diagnosis ; Reagent Kits, Diagnostic ; Social Justice ; Spina Bifida Occulta/diagnosis ; United States ; Voluntary Programs ; alpha-Fetoproteins/analysis
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 49
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-05-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 May 2;208(4443):473-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6988966" target="_blank"〉PubMed〈/a〉
    Keywords: *Federal Government ; Humans ; *Medicare ; Quality of Health Care ; Renal Dialysis/economics/rehabilitation/*trends ; Resource Allocation ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-25
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):475-6, 478-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394512" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Anorexia Nervosa ; Female ; *Human Experimentation ; Humans ; *Jurisprudence ; Lithium ; *National Institutes of Health (U.S.) ; *Patient Selection ; *Research ; *Research Subjects ; Sleep ; United States ; Vomiting
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-06-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kolata, G B -- New York, N.Y. -- Science. 1980 Jun 13;208(4449):1239-42.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7375934" target="_blank"〉PubMed〈/a〉
    Keywords: *Chromosome Aberrations ; Chromosomes/*drug effects ; Drug Industry ; Government Agencies ; Humans ; New York ; Research Design ; Soil Pollutants/*adverse effects ; United States ; Water Pollutants/*adverse effects ; Water Pollutants, Chemical/*adverse effects
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-10-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mac Lane, S -- New York, N.Y. -- Science. 1980 Oct 10;210(4466):158-63.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7414327" target="_blank"〉PubMed〈/a〉
    Keywords: Budgets ; Consultants ; *Government Agencies ; *Research Support as Topic/economics ; Salaries and Fringe Benefits ; United States ; Universities
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 53
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-12-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1980 Dec 12;210(4475):1228-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434021" target="_blank"〉PubMed〈/a〉
    Keywords: *Radioactive Waste/economics ; United States
    Print ISSN: 0036-8075
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  • 54
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-11
    Description: The appropriate technology for control of diseases of economically underdeveloped countries happens to be mainly that applicable to groups as a whole; whereas that effective for most diseases of industrialized societies must be individually delivered. The latter area is where the pharmaceutical industry has scored its greatest triumphs, yet most of this technology does not fit the major disease problems as they now exist in the developing countries. The argument is presented that in order for the U.S. industry to do more in the developing countries, the most needed invention is not a new drug, but a new system for drug development--a new R & D system tailored specially to both the financial and the biologic needs of the problem.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McDermott, W -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):240-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384797" target="_blank"〉PubMed〈/a〉
    Keywords: *Delivery of Health Care ; *Developing Countries ; Humans ; Infant Mortality ; Infant, Newborn ; *Public Health ; Research ; *Technology, Pharmaceutical ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-15
    Description: Autoradiographic and biochemical analyses of the hearts of female rhesus monkeys and baboons indicate that atrial and ventricular myocardial cells contain androgen receptors. Although the specific effects of nuclear uptake and retention of androgen on the function of heart muscle cells are not known, the presence of this receptor suggests that sex steroid hormones may affect myocardial function directly and may explain some of the peculiar differences in heart disease between men and women.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McGill, H C Jr -- Anselmo, V C -- Buchanan, J M -- Sheridan, P J -- New York, N.Y. -- Science. 1980 Feb 15;207(4432):775-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6766222" target="_blank"〉PubMed〈/a〉
    Keywords: Androgens/*metabolism ; Animals ; Coronary Disease/*etiology ; Dihydrotestosterone/metabolism ; Estradiol/metabolism ; Female ; Haplorhini ; Kinetics ; Macaca mulatta ; Myocardium/*metabolism ; Papio ; Receptors, Androgen/*metabolism ; Receptors, Steroid/*metabolism ; Sex Factors
    Print ISSN: 0036-8075
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  • 56
    Publication Date: 1980-07-25
    Description: Accurate measurements of intracellular calcium activities in salivary gland epithelial cells of the insect Phormia regina were obtained with microelectrodes in which N,N'-di(11-ethoxycarbonyl)undecyl-N,N'-4,5-tetramethyl-3,6-dioxaoctane diacid diamide wsa incorporated in a liquid membrane system. When calibrated in solutions approximating the ionic concentration of the cell interior, these microelectrodes gave rapid stable responses that were linear functions of the logarithm of calcium activities and were not affected by potassium, sodium and magnesium. Continuous monitoring of calcium activities during serotonin-induced saliva release provided direct evidence of hormonal influence on transmembrane calcium movement and spontaneous regulation of intracellular calcium by stimulated cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Doherty, J -- Youmans, S J -- Armstrong, W M -- Stark, R J -- New York, N.Y. -- Science. 1980 Jul 25;209(4455):510-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394518" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/drug effects ; Calcium/*metabolism ; Diptera/*metabolism ; Epithelium/metabolism ; Kinetics ; Magnesium/pharmacology ; Microelectrodes ; Salivary Glands/drug effects/*metabolism ; Serotonin/pharmacology
    Print ISSN: 0036-8075
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oettinger, A G -- New York, N.Y. -- Science. 1980 Jul 4;209(4452):191-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280661" target="_blank"〉PubMed〈/a〉
    Keywords: *Information Services/trends ; Jurisprudence ; United States ; Warfare
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parloff, M B -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):823.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7356844" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; Humans ; Psychotherapy/*standards ; United States
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-21
    Description: The rate at which glucose enters nerve terminals in muscle was estimated indirectly by measuring changes in miniature end-plate potential frequency D-Glucose entered nerve terminals in muscles with a fast twitch more rapidly than it entered those with a slow twitch. This suggests that nerve terminals in fast- and slow-twitch muscles differ in their rate of metabolism.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pickett, J B -- New York, N.Y. -- Science. 1980 Nov 21;210(4472):927-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434009" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport ; Diaphragm/innervation ; Glucose/*metabolism ; Kinetics ; Membrane Potentials ; Nerve Endings/*metabolism ; Neuromuscular Junction/*metabolism ; Osmolar Concentration ; Rats
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-01-25
    Description: Carter Administration actions to enhance basic research and stimulate industrial innovation have focused attention on the importance of formal university-industry cooperative relationships in science and engineering. We have examined the status of, and potential for, university-industry research consortia and research partnerships and the current and prospective roles of the federal government in stimulating such relationships.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Prager, D J -- Omenn, G S -- New York, N.Y. -- Science. 1980 Jan 25;207(4429):379-84.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7350670" target="_blank"〉PubMed〈/a〉
    Keywords: Costs and Cost Analysis ; Economics ; Government Agencies ; *Industry ; Patents as Topic ; *Research ; Research Support as Topic ; Taxes ; United States ; *Universities
    Print ISSN: 0036-8075
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-05-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 May 9;208(4444):581.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7367880" target="_blank"〉PubMed〈/a〉
    Keywords: Chemical Industry/*standards ; *Environmental Exposure ; Government Agencies ; Humans ; United States ; *Waste Products
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-03-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1188.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355280" target="_blank"〉PubMed〈/a〉
    Keywords: Economics ; Government Agencies ; *Industrial Waste ; United States ; *Water Pollutants/analysis ; *Water Pollutants, Chemical/analysis
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-03-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Mar 14;207(4436):1189-90.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355281" target="_blank"〉PubMed〈/a〉
    Keywords: *Aircraft ; Government Agencies ; Humans ; Legislation as Topic ; *Noise/economics ; *Noise, Transportation/economics ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-29
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Feb 29;207(4434):963.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7352300" target="_blank"〉PubMed〈/a〉
    Keywords: *Environmental Pollutants ; *Government Agencies ; Jurisprudence ; Legislation as Topic ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-08-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1980 Aug 1;209(4456):567-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7394522" target="_blank"〉PubMed〈/a〉
    Keywords: Benzene ; *Carcinogens ; *Government Agencies ; Humans ; Legislation as Topic ; *Occupational Medicine ; Safety ; United States
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stumpf, W E -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):822-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7355264" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; Peer Review/*methods ; Research Support as Topic ; United States
    Print ISSN: 0036-8075
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):618.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6159683" target="_blank"〉PubMed〈/a〉
    Keywords: Cells, Cultured ; Drug Industry ; Fibroblasts/metabolism ; Humans ; Interferons/*biosynthesis ; Male ; National Institutes of Health (U.S.) ; Research Support as Topic ; United States
    Print ISSN: 0036-8075
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-11-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1980 Nov 7;210(4470):616-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7001624" target="_blank"〉PubMed〈/a〉
    Keywords: *Health Policy ; History, 20th Century ; *Societies, Medical ; United States
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-12-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, J -- New York, N.Y. -- Science. 1980 Dec 5;210(4474):1105-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444437" target="_blank"〉PubMed〈/a〉
    Keywords: Education ; Engineering/economics ; *Government Agencies/organization & administration ; Research Support as Topic ; United States
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, J -- New York, N.Y. -- Science. 1980 Jul 4;209(4452):52-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7025203" target="_blank"〉PubMed〈/a〉
    Keywords: History of Medicine ; Periodicals as Topic/*history ; Publishing/history ; Societies, Scientific/*history ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Walsh, J -- New York, N.Y. -- Science. 1980 Jul 11;209(4453):252-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6104358" target="_blank"〉PubMed〈/a〉
    Keywords: Congresses as Topic ; *Research Support as Topic ; Societies, Scientific ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 72
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-02-22
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Weneser, J -- New York, N.Y. -- Science. 1980 Feb 22;207(4433):861-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6986649" target="_blank"〉PubMed〈/a〉
    Keywords: Canada ; History, 20th Century ; Physics/history ; Societies, Scientific/*history ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 73
    Publication Date: 1980-08-22
    Description: The binding of [6-alanine]gonadotropin-releasing hormone to pituitary plasma membranes increased threefold between metestrus and early proestrus in female rats. Receptor numbers fell rapidly on the afternoon of proestrus coincident with the preovulatory gonadotropin surge. The numbers of receptors for gonadotropin-releasing hormone were positively correlated with concentrations of estradiol in serum; this pattern may be a necessary component of increased pituitary sensitivty to gonadotropin-releasing hormone observed during proestrus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Savoy-Moore, R T -- Schwartz, N B -- Duncan, J A -- Marshall, J C -- New York, N.Y. -- Science. 1980 Aug 22;209(4459):942-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6250218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; Estradiol/blood ; *Estrus ; Feedback ; Female ; Follicle Stimulating Hormone/blood ; Gonadotropin-Releasing Hormone/analogs & derivatives/*metabolism ; Kinetics ; Luteinizing Hormone/blood ; Pituitary Gland, Anterior/*metabolism ; Pregnancy ; Progesterone/blood ; Rats ; Receptors, Cell Surface/*metabolism
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-06-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wharton, C R Jr -- New York, N.Y. -- Science. 1980 Jun 27;208(4451):1415.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7384783" target="_blank"〉PubMed〈/a〉
    Keywords: Agriculture ; *Food Supply ; Humans ; *Starvation ; United Nations ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1980-07-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolfle, D -- New York, N.Y. -- Science. 1980 Jul 4;209(4452):57-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7025204" target="_blank"〉PubMed〈/a〉
    Keywords: History, 20th Century ; Periodicals as Topic/economics/*history ; Societies, Scientific/*history ; United States
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 76
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-05-01
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Branscomb, L M -- New York, N.Y. -- Science. 1981 May 1;212(4494):514-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209546" target="_blank"〉PubMed〈/a〉
    Keywords: Behavior ; Budgets ; Cognition ; Economics ; Engineering/economics ; Forecasting ; *Government Agencies ; Research Support as Topic/*economics ; Social Sciences/economics ; United States
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  • 77
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-04-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Broad, W J -- New York, N.Y. -- Science. 1981 Apr 10;212(4491):137-41.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7209527" target="_blank"〉PubMed〈/a〉
    Keywords: *Biomedical Research ; *Crime ; *Fraud ; National Institutes of Health (U.S.) ; *Research ; Social Control, Formal ; United States
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  • 78
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culliton, B J -- New York, N.Y. -- Science. 1981 Jul 3;213(4503):117.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244625" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; National Institutes of Health (U.S.)/*organization & administration ; *Neoplasms ; *Research ; United States
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  • 79
    Publication Date: 1981-07-31
    Description: Benzodiazepines inhibit Ca2+-calmodulin-stimulated membrane protein phosphorylation. The effects of the benzodiazepines on protein phosphorylation are stereospecific and produced by membrane-bound benzodiazepine. The potency of benzodiazepine kinase inhibition is correlated with the ability of the benzodiazepines to inhibit electric shock-induced convulsions. These findings provide evidence that some of the anticonvulsant and neuronal stabilizing effects of benzodiazepines may be modulated by the Ca2+-calmodulin protein kinase system and indicate that this calmodulin-kinase system represents an identifiable benzodiazepine receptor in brain that is distinquishable by several criteria from the previously described high affinity benzodiazepine receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉DeLorenzo, R J -- Burdette, S -- Holderness, J -- NS 1352/NS/NINDS NIH HHS/ -- NSI-EA-1-K04-NS245/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):546-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6264605" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Benzodiazepines/metabolism ; Brain/*enzymology ; Calcium/*pharmacology ; Calcium-Binding Proteins/*pharmacology ; Calmodulin/*pharmacology ; Cell Membrane/enzymology ; Chlordiazepoxide/*pharmacology ; Diazepam/*pharmacology ; Enzyme Activation ; Kinetics ; Molecular Weight ; Phosphorylation ; Protein Kinases/*metabolism ; Rats ; Receptors, Drug/metabolism ; Receptors, GABA-A
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 80
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-09-04
    Description: The university system in Canada, as well as its method of funding, was built on the expectation of growth. It is now necessary to consider what effect the expected decline in enrollment may have on the ability of the university system to serve national needs. Neither the government nor the universities have had any experience that would fit them for carrying out effectively, humanly, and economically the kind of contraction that may be required, while still maintaining the quality of education. Such an adjustment is going to require the best efforts of the universities and the two senior levels of government working in concert, as well as the support of the public. Parallels are drawn with the situation in the United States.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fortier, C -- New York, N.Y. -- Science. 1981 Sep 4;213(4512):1065-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268413" target="_blank"〉PubMed〈/a〉
    Keywords: Canada ; *Science ; United States ; Universities/manpower/*trends
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  • 81
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Evans, C H -- Tew, W P -- New York, N.Y. -- Science. 1981 Aug 7;213(4508):653-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256262" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cations ; *Erbium ; Kinetics ; *Magnetics
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-12
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gonzalez, M F -- Deutsch, J A -- New York, N.Y. -- Science. 1981 Jun 12;212(4500):1283-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233218" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Feeding Behavior ; Kinetics ; Male ; Rats ; *Satiation ; *Satiety Response ; Stomach/*physiology ; *Vagotomy
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  • 83
    Publication Date: 1981-12-04
    Description: The persistence of synthetic herbicides such as 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) and its release in massive amounts as a herbicide (Agent Orange) have created toxicological problems in many countries. In nature, 2,4,5-T is slowly degraded by cooxidation and is not utilized as a sole source of carbon and energy. The technique of plasmid-assisted molecular breeding has led to the development of bacterial strains capable of totally degrading 2,4,5-T by using it as their sole source of carbon at high concentrations (greater than 1 mg/ml). Spectrophotometry and gas chromatography reveal various intermediates during growth of the culture with 2,4,5-T.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kellogg, S T -- Chatterjee, D K -- Chakrabarty, A M -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1133-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302584" target="_blank"〉PubMed〈/a〉
    Keywords: 2,4,5-Trichlorophenoxyacetic Acid/*metabolism ; Bacteria/*genetics/metabolism ; Biotransformation ; Cell Division ; Kinetics ; Nucleic Acid Hybridization ; *Plasmids
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-08-14
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Klotz, I M -- Haney, D N -- King, L C -- New York, N.Y. -- Science. 1981 Aug 14;213(4509):724-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7256275" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sickle Cell/*drug therapy ; Aspirin/analogs & derivatives/therapeutic use ; Chemical Phenomena ; Chemistry ; *Hemoglobin, Sickle ; Humans ; Protein Binding/drug effects ; Protein Conformation ; Salicylates/*therapeutic use ; Solubility ; Structure-Activity Relationship
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  • 85
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holden, C -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1125-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7015508" target="_blank"〉PubMed〈/a〉
    Keywords: Industry ; *Information Services ; *Medlars ; *National Library of Medicine (U.S.) ; United States
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  • 86
    Publication Date: 1981-06-05
    Description: Two divalent cation ionophores, A23187 and Ionomycin, which are selective for calcium, stimulated the resorption of fetal rat long bones in organ culture at 0.1 to 1 micromolar but not at higher concentrations. Both agents inhibited DNA synthesis at concentrations that stimulated resorption. These results might explain the differences in ionophore effects on bone previously reported, and they imply that cell replication is not required for osteoclast formation in fetal rat long bone cultures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lorenzo, J A -- Raisz, L G -- AM 07290/AM/NIADDK NIH HHS/ -- AM 18063/AM/NIADDK NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1157-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6785885" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/*pharmacology ; Bone Resorption/*drug effects ; Bone and Bones/drug effects/*metabolism ; Calcimycin/*pharmacology ; Calcium/metabolism ; Calcium Radioisotopes ; Cells, Cultured ; DNA/*biosynthesis ; DNA Replication/*drug effects ; Ethers/pharmacology ; Fetus ; Ionomycin ; Ionophores/pharmacology ; Kinetics ; Mice ; Parathyroid Hormone/pharmacology
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  • 87
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-31
    Description: A loss in the number of functional, sodium ion-dependent, high-affinity choline transport sites was observed in the cortex and hippocampus of mice given an intracerebroventricular injection of 65 nanomoles of AF64A (ethylcholine mustard aziridinium ion) 3 days earlier. Such an effect was not observed in the striatum. This effect of AF64A represents a long-term neurochemical deficit at cholinergic nerve terminals in some brain regions which can lead to a persistent deficiency in central cholinergic transmission. The AF64A-treated animal may thus be a model for certain psychiatric or neurological disorders that appear to involve central cholinergic hypofunction.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mantione, C R -- Fisher, A -- Hanin, I -- MH 26320/MH/NIMH NIH HHS/ -- MH/AG 34893/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):579-80.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6894649" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aziridines/*pharmacology ; Azirines/*pharmacology ; Biological Transport/drug effects ; Brain/drug effects/*metabolism ; Cerebral Cortex/metabolism ; Choline/*analogs & derivatives/*metabolism/pharmacology ; Corpus Striatum/metabolism ; Hippocampus/metabolism ; Kinetics ; Mice ; Sodium/pharmacology ; Synaptosomes/drug effects/*metabolism
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  • 88
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Marshall, E -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1120-1.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7248044" target="_blank"〉PubMed〈/a〉
    Keywords: *Data Display ; Humans ; Radiation Injuries/*etiology ; Risk ; United States ; United States Food and Drug Administration
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-12-11
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maugh, T H -- New York, N.Y. -- Science. 1981 Dec 11;214(4526):1225-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302591" target="_blank"〉PubMed〈/a〉
    Keywords: *Cephalosporins/therapeutic use ; Humans ; Research ; Structure-Activity Relationship ; United States
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  • 90
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-12-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Maugh, T H -- New York, N.Y. -- Science. 1981 Dec 4;214(4525):1113.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302582" target="_blank"〉PubMed〈/a〉
    Keywords: Hepatitis B/*prevention & control ; Hepatitis B Surface Antigens/*standards ; Humans ; United States ; United States Food and Drug Administration ; *Vaccines
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  • 91
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-02-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rubin, V C -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):915-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7008193" target="_blank"〉PubMed〈/a〉
    Keywords: Astronomy/history ; History, 20th Century ; Societies, Scientific/*history ; United States
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  • 92
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-01-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schmitt, H -- New York, N.Y. -- Science. 1981 Jan 16;211(4479):226.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444463" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; National Institutes of Health (U.S.) ; *Research Support as Topic ; United States
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  • 93
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-07-31
    Description: During normal development of the hamster eye, there is a substantial loss of cells from the retinal ganglion cell layer in the first two postnatal weeks. If one eye is lost at birth, this cell death is reduced in the remaining eye. This may account for the increased ipsilateral projection from this eye to the thalamus and midbrain observed in these animals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sengelaub, D R -- Finlay, B L -- New York, N.Y. -- Science. 1981 Jul 31;213(4507):573-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7244655" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Cell Survival ; Cricetinae ; Kinetics ; Neurons/*physiology ; Rats ; Retina/cytology/*physiology
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-08-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1981 Aug 28;213(4511):986-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7268411" target="_blank"〉PubMed〈/a〉
    Keywords: Aspartame/*standards ; Dipeptides/*standards ; United States ; United States Food and Drug Administration
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  • 95
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1373.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233225" target="_blank"〉PubMed〈/a〉
    Keywords: *Food Handling ; Humans ; *Sodium ; United States ; *United States Food and Drug Administration
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  • 96
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, R J -- New York, N.Y. -- Science. 1981 Jun 26;212(4502):1482-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233234" target="_blank"〉PubMed〈/a〉
    Keywords: *Federal Government ; *Government Agencies ; *Government Regulation ; *Health Policy ; Humans ; Occupational Diseases/*prevention & control ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 97
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-06-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1122.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233205" target="_blank"〉PubMed〈/a〉
    Keywords: Government Agencies ; Humans ; National Institutes of Health (U.S.) ; *Neoplasms ; Politics ; *Research Support as Topic ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 98
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-02-27
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1981 Feb 27;211(4485):906-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7466364" target="_blank"〉PubMed〈/a〉
    Keywords: *Compensation and Redress ; Costs and Cost Analysis ; Disclosure ; Drug Industry/economics/*standards ; *Federal Government ; Humans ; Insurance ; *Jurisprudence ; Mandatory Programs ; Risk ; Risk Assessment ; United States ; Vaccines/*adverse effects ; Voluntary Programs
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-11-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1981 Nov 20;214(4523):887-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7302567" target="_blank"〉PubMed〈/a〉
    Keywords: Disclosure ; Drug Evaluation/*standards ; Federal Government ; *Government Regulation ; Humans ; *National Institutes of Health (U.S.) ; Neoplasms/*drug therapy ; Politics ; Risk Assessment ; *Therapeutic Human Experimentation ; United States ; United States Food and Drug Administration
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 100
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1981-10-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sun, M -- New York, N.Y. -- Science. 1981 Oct 9;214(4517):166-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7280688" target="_blank"〉PubMed〈/a〉
    Keywords: National Institutes of Health (U.S.)/*organization & administration ; Occupational Medicine/*standards ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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