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  • 1
    Electronic Resource
    Electronic Resource
    Substitution reactions of oxalato complex ions. X. Kinetics and mechanism of electron transfer between the chromium(II) aquo cation and some aquooxalatochromium(III) complex ions (1972)
    s.l. : American Chemical Society
    Inorganic chemistry 11 (1972), S. 1067-1071 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50111a031
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  • 2
    Electronic Resource
    Electronic Resource
    Nonstereospecific cycloaddition of tetrafluoroethylene to ethylene-1,2-d2 (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 2899-2902 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00763a081
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  • 3
    Electronic Resource
    Electronic Resource
    Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. II. Red-muscle metabolism in shallow-water fishes (1972)
    Springer
    Marine biology 15 (1972), S. 246-250 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maximal rates of oxygen consumption in vitro have been measured under standardized conditions at three test temperatures (5°, 15°, 25°C) on minced preparations of red muscle from 10 species of shallow-water marine teleost fishes. These fishes came from three different geographic areas, two with cool average water temperatures (near 15°C: coastal southern California, Galápagos Islands) and one with warm average water temperatures (near 25°C: Hawaiian Islands). The group is made up of post-juvenile or adult epipelagic fishes, which are moderately or very active in terms of their locomotor activities. A large part of the range of phylogenetic diversity among the teleosts is represented, as is the body weight range from a few grams to several kilograms. The purpose of the work is to provide part of a set of tissue-metabolism data on shallow-water fishes for future comparison with similar results from deep-sea species. Of 8 complete curves for oxygen uptake rate versus temperature (R-T curves), 6 are normal in shape (Q10≧1.5), 1 is normal but with a low Q10, and 1 is partly flat, partly normal. The differences between the species in terms of both absolute positions and slopes of the R-T curves are not related in any consistent way to any of the three testable variables: phylogenetic position, long-term adaptation temperature, and body size. The red muscles of a variety of adult epipelagic fishes, at ecologically realistic temperatures, are shown to be exceptions to the general rule that tissues of ectothermous lower vertebrates have lower metabolic rates than comparable tissues of non-torpid endothermous higher vertebrates. This circumstance probably is a major factor in the great capacities for sustained high-speed swimming shown by most epipelagic fishes. Other physiological and ecological implications of the results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383554
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  • 4
    Electronic Resource
    Electronic Resource
    Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. I. White-muscle metabolism in shallow-water fishes (1972)
    Springer
    Marine biology 13 (1972), S. 222-237 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Maximal rates of oxygen consumption in vitro have been measured under standardized conditions at three test temperatures (5°, 15°, and 25°C) on minced preparations of white muscle from 39 species of shallow-water marine teleost fishes. These fishes came from four different geographic areas, two with cool average water-temperatures (near 15°C: coastal southern California, Galápagos Islands) and two with warm average water-temperatures (near 25°C: Hawaiian Islands; Bermuda). The group includes species covering much of the range of variation to be found among the teleosts with respect to five additional variables: phylogenetic position, type of environment, body weight, activity level, and growth stage. The purpose of the work is to provide part of a base line of tissue-metabolism data on shallow-water fishes for comparison with similar results from deep-sea species. Major conclusions from statistical analyses of the results are: four groups of shapes of oxygen-uptake rate versus temperature curves exist: normal, flat, dipped and peaked. Over 50% of curves are normal. Intra-group differences, contributing significantly to the total variance of the results at given test temperatures, are: cool versus warm average environmental temperatures primarily for epipelagic species; epipelagic versus non-epipelagic environments; very active species versus all others; juvenile stages versus adults. In each case, the subgroup first mentioned shows higher muscle oxygen-uptake rates than the other subgroup. Variables not contributing significantly to the total variance are phylogenetic position and body weight. Physiological and ecological implications of these results are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391380
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  • 5
    Electronic Resource
    Electronic Resource
    Reaction of phenylmagnesium bromide with acetonitrile (1972)
    s.l. : American Chemical Society
    The @journal of organic chemistry 37 (1972), S. 3369-3370 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00986a047
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  • 6
    Electronic Resource
    Electronic Resource
    Regulators of Cell Division in Plant Tissues XIV. The Cytokinin Activities and Metabolism of 6-Acylaminopurines (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 27 (1972), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Certain 6-acylaminopurines have been shown to exhibit activity in several cytokinin bioassays. The active compunds included 6-N,2′-O-dibutyryladenosine 3’:5′-cyclic monophosphate, but adenosine 3′:5′-cyclic monophosphate was inactive. The metabolites formed from [2,8-3H] 6-benzoylaminopurine by radish seedlings and excised radish cotyledons were investigated. When compared with zeatin, this amide showed considerable stability in vivo. Conversion to 6-benzylaminopurine and its riboside was not detected but slight degradation to adenine was indicated. The principal metabolite was an unidentified compund.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1972.tb03616.x
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  • 7
    Electronic Resource
    Electronic Resource
    The relationship of matrix norms to matrix singularities (1972)
    Springer
    Mathematische Zeitschrift 127 (1972), S. 365-369 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01111394
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  • 8
    Electronic Resource
    Electronic Resource
    The stabilisation of critically branched polycondensates (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 152 (1972), S. 233-246 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Ein Zustand der kritischen Verzweigung (d. h. bei Systemen in der Nähe des Gelpunktes), der eine zentrale Rolle in der Biologie spielt, wird bei synthetischen Hochpolymeren nur vorübergehend beobachtet. Gut charakterisierte Polykondensate aus Decamethylenglykol (DMG)/Benzol-1.3.5-triessigsäure (BTA) sind nahe des Gelpunktes durch quantitative Umsetzung der freien Carboxylgruppen mit Diphenyldiazomethan stabilisiert worden. Ein derartiges Polymersystem vom Molekulargewicht ca. 105 war so stabil, daß es selbst nach zweistündigem Tempern bei 150°C in Luft unverändert war. Die Viskosität solcher Flüssigkeiten wurde als Funktion der Temperatur bezüglich der WLF-Gleichung untersucht. Das Versagen der Theorie des Glasübergangs im Sinne der isoviscosen Zustände wird erläutert. Die Kristallisation von etwa zwei Prozent nicht umgesetztem DMG verursacht einen scharfen, reversiblen Gelübergang in diesen Flüssigkeiten. Wahrscheinlich treten Wechselwirkungen zwischen dem flüssingen Polykondensat und der Kristalloberfläche auf. Der Tribenzhydrylester von BTA ist eine neue kristalline Verbindung mit einem Molekulargewicht von ca. 750.
    Notes: The critically branched state of matter (i.e. systems near their gel point), which occupies a central role in biology, is usually observed only fleetingly in synthetic polymers. Well characterised polycondensates of decamethylene glycol (DMG)/benzene 1.3.5-triacetic acid (BTA) have now been stabilised near gelation by quantitative benzhydrylation of the free carboxyls with diphenyl diazomethane. Such a polymer system, of weight av. mol. wt. about 105 was so stable that it remained unchanged after heating in air to 150°C for two hrs. The bulk viscosity of such liquids is studied as a function of temp. in relation to the WLF transform. The manner in which the isoviscous-state theory of Tg fails is elucidated. The crystallisation of about two per cent residual DMG causes a sharp a sharp reversible gelation in these liquids, probably because of some sort of interaction between the liquid polycondensate and the crystal surfaces. The tribenzhydryl ester of BTA is a new crystalline compound of mol. wt. about 750.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021520122
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  • 9
    Electronic Resource
    Electronic Resource
    Ring-chain competition kinetics in linear polymers (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 152 (1972), S. 277-289 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neuere Daten von STEPTO und WAYWELL zur Ring-Ketten-Konkurrenz bei der kinetisch kontrollierten Polyaddition (d. h. mit der Rückreaktionsgeschwindigkeit = 0) im System Polyäthylenglykol/Hexamethylendiisocyanat wurden durch exakte Computerberechnungen untersucht, und zwar unter Voraussetzung einer GAUSS-Statistik. Es konnte eine gute Ein-Parameter-Anpassung erzielt werden. Die optimalen Werte der Parameter wurden mit der Theorie verglichen. Die Ergebnisse deuten darauf hin, daß das verwendete Lösungsmittel (Benzol bei 70°C) für dieses Polymersystem „thermodynamisch schwach“ ist.
    Notes: Recent data of STEPTO and WAYWELL for ring-chain competition in the kinetically controlled polymerizing system (i.e. backward rate = 0) of (polyethylene glycol)/(hexamethylene diisocyanate) have been fitted by exact computer calculations, assuming GAUSSian chain statistics. A good one-parameter fit is obtained. The optimum value of the parameter is compared with theory. The results suggest that the solvent used (benzene at 70°C) is thermodynamically poor for this polymer system.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021520125
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  • 10
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    Unknown
    Nonstereospecific cycloaddition of tetrafluoroethylene to ethylene-1,2-d2 (1972)
    American Chemical Society
    Details
    Publication Date: 1972-04-01
    Print ISSN: 0002-7863
    Electronic ISSN: 1520-5126
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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