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  • 1
    Electronic Resource
    Electronic Resource
    The effects of nucleases on photosynthetic CO2 fixation (1960)
    Springer
    Cellular and molecular life sciences 16 (1960), S. 135-136 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Es scheint, dass DNase und RNase bei der photosynthetischen Fixierung des CO2 verschiedene und komplizierte Wirkung ausüben. Die Saccharaose-Synthese wird durch die Behandlung mit DNase und RNase deutlich vermindert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157714
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  • 2
    Electronic Resource
    Electronic Resource
    The coalescence of droplets stabilised by Viscoelastic Adsorbed Films (1962)
    Springer
    Colloid & polymer science 185 (1962), S. 31-38 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Adsorption vieler Arten von Makromolekülen an einer flüssig/flüssig-Grenzfläche erhöht oft den Widerstand gegen die Koaleszenz von Öltropfen in Wasser und umgekehrt. Eine quantitative Studie der Koaleszenzzeiten für Flüssigkeitstropfen, die unter einer flüssig/flüssig-Grenzfläche ruhen, wurde versucht. Die Ergebnisse lassen sich mit rheologischem Verhalten (a. a. 0.), Löslichkeit und Struktur des adsorbierten Filmes erklären. Es läßt sich eine allgemeine Koaleszenzzeit ableiten für den Zusammenhang der Koaleszenzzeit mit Viskoelastizität und Dicke des adsorbierten Films, sowie der kritischen Verformung der zunächst planen Grenzfläche unter dem Auftrieb des Tropfens.
    Notes: Summary The adsorption of many types of macromolecule at liquid/liquid interfaces very often greatly increases the resistance to coalescence of oil droplets in water and vice verca. A quantitative study has been attempted of the coalescence times for liquid droplets resting under plane liquid/liquid interfaces. These results have been interpreted in the light of the rheology (investigated elsewhere), solubility and structure of the adsorbed films. A general equation has been derived relating the time for coalescence to the viscoelasticity and thickness of the adsorbed film and the critical distortion of the plane interface under the weight of the drop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01882345
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  • 3
    Electronic Resource
    Electronic Resource
    The effect of certain small molecules on the elasticity of adsorbed serum albumin films (1962)
    Springer
    Colloid & polymer science 186 (1962), S. 57-61 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die sehr hohe Grenzflächenviskoelastizität, die von adsorbierten Albuminfilmen an der Grenzfläche Petroleumäther/Wasser auftritt, wird durch geringe Konzentrationen von sowohl ionisierenden wie nicht ionisierenden oberflächenaktiven Substanzen zerstört. Die Abwanderung des Albumins von der Grenzfläche wird sicherlich durch hohe Konzentrationen von ionischen grenzflächenaktiven Substanzen verursacht, und es läßt sich zeigen, daß dies der wahrscheinlichste Wirkungsmechanismus dieser zugegebenen Moleküle ist. Bei nichtionisierten aliphatischen Alkoholen wird das Albumin nicht vollständig aus der Grenzfläche entfernt, und die Ergebnisse für die Elastizität und den Oberflächendruck lassen sich entweder durch teilweise Abwanderung erklären oder durch die Annahme, daß das adsorbierte Protein nur teilweise oberflächendenaturiert ist.
    Notes: Summary The very high interfacial visco-elasticity exhibited by adsorbed albumin films at the petroleum ether/water interface is destroyed by small concentrations of both ionized and unionized surface active substances. The displacement of the albumin from the interface is certainly brought about by high concentrations of the ionic surfactants and it is shown that this is the most likely mechanism of action for these molecules. For the unionized aliphatic alcohol the albumin is not completely displaced from the interface and the elasticity and surface pressure measurements could be explained either by partial displacement or by the assumption that the adsorbed protein is only partly surface denatured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01797954
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  • 4
    Electronic Resource
    Electronic Resource
    Application of the Weisz Ring oven technique to the separation and identification of micro-quantities of some less familiar cations (1963)
    Springer
    Microchimica acta 51 (1963), S. 10-13 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Zur Trennung und Identifizierung folgender Gemische seltenerer Metallionen wurde der Ringofen mit Erfolg verwendet: 1. UO2(II) und Th(IV), 2. Th(IV) und Ce(IV), 3. Pd(II) und Au(III), 4. Pt(IV) und Au(III), 5. Ce(III) und Ce(IV), 6. UO2(II), Th(IV) und Ti(IV), 7. Th(IV), Ti(IV) und Ce(IV). 8. Th(IV), Ce(IV) und Zr(IV), 9. Ti(IV), V(V) und Zr(IV), 10. Mo(VI), V(V) und W(VI) und 11. Be(II), Al(III) und Mg(II). Bei binären Gemischen erfolgt die Trennung in einen zentralen Fleck und einen Ring, bei ternären Mischungen in einen Fleck und zwei konzentrische Ringe.
    Abstract: Résumé On a décrit l'utilisation du four annulaire pour la séparation et l'identification de mélanges d'ions métalliques moins courants. On a effectué la séparation des ions métalliques à partir des mélanges suivants: 1. UO2(II) et Th(IV), 2. Th(IV) et Ce(IV), 3. Pd(II) et Au(III), 4. Pt(IV) et Au(III), 5. Ce(III) et Ce(IV), 6. UO2(II), Th(IV) et Ti(IV), 7. Th(IV), Ti(IV) et Ce(IV), 8. Th(IV), Ce(IV) et Zr(IV), 9. Ti(IV), V(V) et Zr(IV), 10. Mo(VI), V(V) et W(VI) et 11. Be(II), Al(III) et Mg(II). Dans le cas des mélanges binaires, la séparation se présentait sous forme d'une tache centrale et d'un anneau concentrique; chez les mélanges ternaires, les métaux étaient précipités en une tache centrale et deux anneaux concentriques.
    Notes: Summary Use of the ring oven in separation and identification of mixtures of less familiar metal ions has been described. Separation of metal ions from the following mixtures has successfully been carried out: 1. UO2(II) and Th(IV), 2. Th(IV) and Ce(IV), 3. Pd(II) and Au(III), 4. Pt(IV) and Au(III), 5. Ce(III) and Ce(IV), 6. UO2(II), Th(IV) and Ti(IV), 7. Th(IV), Ti(IV) and Ce(IV), 8. Th(IV), Ce(IV) and Zr(IV), 9. Ti(IV), V(V) and Zr(IV), 10. Mo(VI), V(V) and W(VI) and 11. Be(II), Al(III) and Mg(II). In the case of binary mixtures, the separation was in the form of a central spot and a concentric ring; in ternary mixtures the metals were precipitated in a central spot and two concentric rings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01239251
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  • 5
    Electronic Resource
    Electronic Resource
    A systematic scheme for the analysis of common anions using the Weisz ring oven technique (1963)
    Springer
    Microchimica acta 51 (1963), S. 40-44 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein systematischer Analysengang zum Nachweis folgender Anionen mit Hilfe des Ringofens wurde beschrieben: Sulfat, Sulfit, Nitrat, Nitrit, Fluorid, Chlorid, Bromid, Jodid, Cyanoferrat(III), Cyanoferrat (II), Rhodanid, Phosphat, Sulfid, Thiosulfat und Borat.
    Abstract: Résumé On a décrit un plan d'identification systématique des anions usuels dans leurs mélanges: sulfate, sulfite, nitrate, nitrite, fluorure, chlorure, bromure, iodure, ferricyanure, ferrocyanure, thiocyanate, phosphate, sulfure, thiosulfate et borate, au moyen de la technique du four annulaire.
    Notes: Summary A systematic scheme for the identification of the common anions: sulphate, sulphite, nitrate, nitrite, fluoride, chloride, bromide, iodide, ferricyanide, ferrocyanide, thiocyanate, phosphate, sulphide, thiosulphate and borate in a mixture by the ring oven technique has been described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01239257
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  • 6
    Electronic Resource
    Electronic Resource
    Ultrasonic degradation of sol rubber in solution (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2653-2659 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Sol rubber dissolved in three solvents - cyclohexane, petroleum ether (40-60°C. fraction), and toluene - was degraded by ultrasonic waves, the degradation kinetics being followed by measuring spectrophotometrically the consumption of the free radical scavenger α,α′-diphenyl-β-picryl hydrazyl. The kinetic data have been examined by the rate equations developed from two different approaches: one by Jellinek and the other by Ovenall. It has been observed that the number of bonds broken as a function of time can be fitted equally well by both equations in the initial stage, but as the time of degradation increases, especially when the number-average degree of polymerization attains a value less than 3Pe/2, the rate can be described better by Jellinek's equation than that of Ovenall. The rate constants K and the final degree of polymerization for rubber are found to depend on the nature of the solvent.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1964.070080613
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  • 7
    Electronic Resource
    Electronic Resource
    Viscometric determination of molecular weight of cellulose pulps in zinc ethylenediamine solutionCommunication No. 473 from the National Chemical Laboratory, Poona-8, India. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 181-186 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A convenient method of preparing zinc ethylenediamine complex (ZED) solution for use as solvent for cellulose pulp is described, and the advantages in using this solvent (0.25M zinc in 41% ethylenediamine in water) over cupriethylenediamine (CED) or cuprammonium solutions for viscometric determination of molecular weight of cellulose are indicated. Intrinsic viscosities of eight rayon-grade pulp solutions have been determined at four temperatures: 15, 20, 25, and 30°C. The constants K = 5.85 × 10-5 and a = 0.936 of the Mark-Houwink equation [η] = KMna, required for evaluating the molecular weight of cellulose pulps in ZED solution, have been determined by using the molecular weight values obtained from CED solutions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070116
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  • 8
    Electronic Resource
    Electronic Resource
    A study on the thermal degradation of rubber in dilute solutionsCommunication No. 529 from the National Chemical Laboratory, Poona-8, India. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 2199-2209 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The kinetics of low-temperature (60-100°C.) thermal degradation of deproteinized and deresinified petroleum ether soluble fraction of natural rubber in two chemically inert solvents, cyclohexane and trans-decalin, have been studied. The changes in Mw, A2, and (r2)1/2 at various stages of degradation have been obtained from the lightscattering data. The rate constants and the energy of activation for chain scission have been calculated from the observed variation in Mu. The scission has been found to be random and the average energy of activation is 25.8 kcal./mole. This low-energy requirement suggests the presence of weak links in the rubber molecule which get ruptured at low temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070619
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  • 9
    Electronic Resource
    Electronic Resource
    The systematic studies of the zoo-parasitic oxyuroid nematodes (1963)
    Springer
    Parasitology research 23 (1963), S. 411-428 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Eleven Oxyuroid parasites are described in the present paper of which three belong to new genera and seven to new species. One species has been re-described. Basirella n.gen. is characterised in having a divided type of body into an anterior barrel-shaped part and a long posterior part. Neoprotozoophaga n.gen. possesses lateral alae in male, boat-shaped spicula and vulva in the oesophageal region. Propharyngodon n. gen. bears no spicule and accessory piece. Affinities are discussed. A host-parasite list is furnished.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00259929
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  • 10
    Electronic Resource
    Electronic Resource
    A new variety of Nitzschia sinuata (W. Sm.) Grun. from North Wales, Great Britain (1964)
    Springer
    Hydrobiologia 23 (1964), S. 511-514 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Eine neue Kieselalge, Nitzschia sinuata, var. denticuloides, var. n., ist in zwei Süsswasserquellen in Newborough Warren, Anglesey, Nord Wales, Grossbritannien spärlich verbreitet entdeckt worden. Diese beiden Quellen sind durch seichtes Wasser, milde Temperaturen und hohen pH Wert gekennzeichnet. Hohe Kalcium, Sodium und Chlorid Werte und niedrige Phosphat und Kalium Werte beweisen den dysharmonischen oder idiotrophen Charakter des Wassers. Die Algengesellschaft bestand hauptsächlich aus Cladophora fracta (Dillw.) Kuetz., dicht besetzt von epiphytischen Diatomeen wie Epithemia and Achnanthes Arten.
    Notes: Summary A new taxon, Nitzschia sinuata, var. denticuloides, var. n. was found to occur sparingly in two freshwater springs of Newborough Warren, Anglesey, North Wales, Great Britain. These two springs were characterized by shallow waters, moderate temperature and high pH. Dysharmonious or idiotrophic nature of the water was evident from high calcium, sodium and chloride contents, as well as low phosphate and potassium contents. The algal community was found to be dominated by Cladophora fracta (Dillw.) Kuetz. bearing a vast population of epiphytic diatoms such as Epithemia and Achnanthes species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00179499
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