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  • 1
    Electronic Resource
    Electronic Resource
    Silk–Phosphoric Acid Solutions (1954)
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 952-953 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Independently of this problem, the question arises whether all the solvents mentioned cause decomposition of the silk molecule or not. Howitt2 claimed that cupriethylenediamine does not do so ; but Signer3 has recently doubted that statement. Lithium bromide4 and lithium thiocyanate3 seem to ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/173952a0
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  • 2
    Electronic Resource
    Electronic Resource
    Das rheologische Verhalten der gebogenen α-Helix (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 1055-1062 
    Details
    ISSN: 1434-4475
    Keywords: α-Helix ; Polybenzyl-L-glutamate ; Rheological properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Intrinsic viscosity and its shear dependence of polybenzyl-L-glutamat inm-cresol suggest a slightly bent α-helix. Axis ratio and rotational diffusion constant of the envelopping cylinder are determined and the length of the helix calculated, which leads to the correct molecular weight. The amount of solvated and hydrodynamically immobilized water is estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00905073
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  • 3
    Electronic Resource
    Electronic Resource
    Nachweis der Ausbildung übermolekularer Teilchen in Lösungen vonDNA durch Messung der Lichtstreuung und Viskosität (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 1115-1137 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Buffered solutions of various preparations of calves thymus and salmon sperm resp. were investigated by optical and rheological methods. The fine structure of measuredP(θ)-light scattering functions was interpreted as being caused by large supermolecular particles in solution. These could be analysed by use of theRayleigh-Gans-theory and were found to have low density and to be very sensitive against temperature and shear. Number and size of supermolecular particles inDNA-solutions increase steadily when the solutions are allowed to rest for some days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00913014
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  • 4
    Electronic Resource
    Electronic Resource
    Crystal structure and spectra of the Ni(II) complex of pyridine-2,6-dithio-carbomethylamide (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 721-730 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure analysis ; Electronic spectra ; Infrared spectra ; Magnetic susceptibility ; Pyridine-2,6-dithiocarbomethylamide nickel(II)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kristallstruktur des paramagnetischen bis(Pyridin-2,6-dithiocarbomethylamid) Nickel(II)-nitrats (NiPDTA) wurde bestimmt. C18H22N6S4Ni·(NO3)2·(H2O)1,5, monoklin, C2/c,Z=4,a=14,705 (3) Å,b=23,254 (8) Å,c=8,383 (3) A, β=98,18 (2)°,d x=1,55gcm−3,d m=1,53gcm−3. Das Phasenproblem wurde mittelsPatterson-und Differenz-Fourier-Synthese bestimmt und die Struktur bis zu einem kristallographischenR-Faktor vonR=0.053 verfeinert. Das Nickel-Atom ist von vier Thioamid-Schwefelatomen und zwei Pyridin-Stickstoffatomen in quadratisch-bipyramidaler Anordnung umgeben. Schwingungsspektren und Anregungsspektren des Komplexes werden diskutiert.
    Notes: Abstract The crystal structure of the paramagnetic bis(pyridine-2,6-dithiocarbomethylamide) nickel(II) nitrate (NiPDTA) is described: C18H22N6S4·(NO3)2·(H2O)1,5, monoclinic, C2/c,Z=4,a=14.705 (3) Å,b=23.254 (8) Å,c=8.383 (3) A, β=98.18 (2)°,d x=1.55 gcm−3,d m=1.53 gcm−3. The structure was solved withPatterson and differenceFourier techniques and refined to a residual ofR=0.053. The nickel is surrounded by a square bipyramidal coordination of four thioamide sulfur atoms and two pyridine nitrogen atoms. Vibrational and electronic band positions for this compound are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899775
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  • 5
    Electronic Resource
    Electronic Resource
    Crystal structure and vibrational spectra of pyridine-2,6-dithio-carbomethylamide (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 537-545 
    Details
    ISSN: 1434-4475
    Keywords: Crystal structure analysis ; Pyridine-2,6-dithiocarbomethylamide ; Vibrational spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kristallstruktur von Pyridin-2,6-dithiocarbomethylamid (PDTA) wurde bestimmt: C9H11N3S2, monoklin, P21/c,Z=4,a=6,000 (1) Å,b=8,840 (1) Å,c=21,452 (1) Å, β=105,47 (1)o,d x=1,47 gcm−3. Das Phasenproblem wurde mittels direkter Methoden gelöst und die Struktur bis zu einemR-Faktor vonR=0,047 verfeinert. Das Molekül ist im Kristall nahezu planar. Das Vorliegen schwacher intramolekularer Wasserstoffbrücken zwischen den beiden Thioamid-Stickstoffatomen und dem Pyridinstickstoff sowie intermolekularer Wasserstoffbrücken zwischen Thioamid-Stickstoff- und Thioamid-Schwefelatomen wird postuliert. IR- undRaman-Spektren vonPDTA und deuteriertemPDTA werden diskutiert.
    Notes: Abstract The crystal structure of Pyridine-2,6-dithio-carbomethylamide (PDTA) is described: C9H11N3S2, monoclinic, P21/c,Z=4,a=6.000 (1) Å,b=8.840 (1) Å,c=21.452 (1) Å, β=105.47 (1)o,d x=1.47 gcm−3. The structure was solved with direct methods and refined to a conventionalR-factor of 0.047. The molecule is nearly planar in the crystal. There are possibly weak intramolecular H-bonds between the two amide nitrogens and the pyridine nitrogen and intermolecular H-bonds between two amide nitrogens and one thioamide sulfur atom. The IR andRaman spectra ofPDTA and deuteratedPDTA are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899668
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  • 6
    Electronic Resource
    Electronic Resource
    Die Berechnung der Schubspannung für das Kugelfall-Viskosimeter (1955)
    Springer
    Naturwissenschaften 42 (1955), S. 339-340 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00589651
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  • 7
    Electronic Resource
    Electronic Resource
    Über die Textur der in Fucus vorkommenden Zellulose (1953)
    Springer
    Naturwissenschaften 40 (1953), S. 438-438 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00590355
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  • 8
    Electronic Resource
    Electronic Resource
    Eine Untersuchung vonClematis-Bastfasern (1954)
    Springer
    Naturwissenschaften 41 (1954), S. 363-363 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00643291
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  • 9
    Electronic Resource
    Electronic Resource
    Pfropfcopolymerisation von Cellulose mit zwei Vinylmonomeren (1969)
    Springer
    Monatshefte für Chemie 100 (1969), S. 532-539 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract This paper describes experiments to increase the grafting of cellulose with components of poor reactivity by mixing them with highly reactive ones. A highly purified wood pulp was used as backbone. Using combinations of styrene and methyl methacrylate it was possible to graft considerably higher amounts of the poorly reacting styrene than in the absence of the highly reactive methyl methacrylate.
    Notes: Zusammenfassung Die vorliegende Arbeit stellt eine Beschreibung von Experimenten dar, die die Erhöhung der Pfropfbereitschaft von trägen Komponenten durch Beimischung von aktiveren zum Ziele hatten. Das Trägermolekül war in allen Fällen Cellulose in Form von hochgradig gereinigtem Zellstoff. Durch die Verwendung von Mischsystemen aus Styrol und Methylmethacrylat gelang es, das trägere Styrol in bedeutend größerer Menge auf die Cellulose aufzupfropfen, als es bei Abwesenheit des aktiven Methylmethacrylats der Fall war.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00904098
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  • 10
    Electronic Resource
    Electronic Resource
    Konzentrations- und Temperaturabhängigkeit der Viskosität von Polyacrylnitril-Lösungen in Dimethylformamid (1980)
    Springer
    Monatshefte für Chemie 111 (1980), S. 1053-1060 
    Details
    ISSN: 1434-4475
    Keywords: Concentration dependence of viscosity ; Polyacrylonitrile solutions ; Temperature dependence of viscosity ; Viscosity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Viscosity measurements were carried out with polyacrylonitrile dissolved in dimethylformamide up to 0.36 g/ml. The temperature range was 20°C to 130°C, the highest shear gradient applied, 5.6·103s−1. The temperature variation of viscosity is reproduced with sufficient accuracy by the equation ν=k·exp (Q/RT). Bothk andQ increase as concentration increases, and the viscosity increases withc 1.12 toc 6.4 Inverse proportionality appears to exist between concentration and the longest relaxation time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909661
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