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  • 1
    Electronic Resource
    Electronic Resource
    Biosynthesis of estrogens. Assignment of the chemical shift of the 19-pro-chiral hydrogen atoms of a 19-hydroxy precursor (1978)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 100 (1978), S. 5223-5224 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00484a060
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  • 2
    Electronic Resource
    Electronic Resource
    Gas production by Escherichia coli in selective lactose fermentation media (1980)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 8 (1980), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1980.tb05022.x
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  • 3
    Electronic Resource
    Electronic Resource
    Synergistic inhibition of Escherichia coli growth and gas production in selective media (1980)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 8 (1980), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1980.tb05082.x
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  • 4
    Electronic Resource
    Electronic Resource
    Inconsistent results with the Escherichia coli confirmatory medium lactose ricinoleate broth (1979)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 5 (1979), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1979.tb03245.x
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  • 5
    Electronic Resource
    Electronic Resource
    Monomer-dimer equilibrium study of dichloroacetic acid in the vapor phase and in carbon tetrachloride solution (1978)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 82 (1978), S. 1018-1021 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100498a011
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  • 6
    Electronic Resource
    Electronic Resource
    Role of ascorbic acid in auxin induced cell elongation (1980)
    Springer
    Histochemistry and cell biology 69 (1980), S. 101-109 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cytochemical detection of ascorbic acid in cultured root tips of Zea mays shows that dividing cells accumulate ascorbic acid in the cytoplasm. The localization pattern alters in the root tip as the cells begin to elongate. In elongating cells ascorbic acid is distinctly localized on cell walls. Ascorbic acid content per cell inreases with the onset of cell elongation. Fully elongated cells contain fivefold more ascorbic acid than meristematic cells. Cytophotometric analysis reveals a sharp and positive correlation (r=+0.93) between percentage increase in content of ascorbic acid per cell and corresponding increase in cell size at different phases of cell elongation. IAA treatment to the roots raises the content of ascorbic acid per cell with a parallel increase in size of cell. Involvement of ascorbic acid in IAA induced cell elongation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508371
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  • 7
    Electronic Resource
    Electronic Resource
    Crystallization of polyacrylonitrile: Growth mechanisms for various growth features (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 859-867 
    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 Kristallisation von Polyacrylnitril und anderen Polymeren wird nach der Methode der Filmbildung ausgeführt. Das Polyacrylnitril war hergestellt durch Polymerisation von Acrylnitril initiiert mit einem Cer-Ionen-Redoxsystem. Die Fraktionierung des Polyacrylnitrils wurde mit der Methode, dieKobayashi undFujisaki beschrieben haben, durchgeführt. Die vorliegende Studie für die Untersuchung der wachsenden Kristalle wurde an einer Probe mit dem mittleren Molekulargewicht $$\bar M_w = 1,2 \times 10^5 $$ durchgeführt. Cellulosetriacetat (CTA) mit dem Molekulargewicht $$\bar M_n = 3,5 \times 10^5 $$ , bestimmt aus Viskositätsmessungen in Chloroform bei 25 °C nach Haward und Parikh, wurde ebenso wie Polydthylen (PE), mit $$\bar M_n = 9,9 \times 10^4 $$ aus Viskositdtsmessungen in Xylol bei 90 °C nach Billmeyer, für die Beobachtung des Kristallwachstums verwendet. PE wurde von den Chemischen Werken Hüls (Deutschland) geliefert, CTA durch Acetylierung von Cellulose mit Essigsdure und Essigsäureanhydrid und Perchlorsäure als Katalysator präpariert. Amyloseacetat wurde aus Amylose extrahiert, aus Kartoffelstärke gewonnen.
    Notes: Summary Crystallization of polyacrylonitrile has been carried out at different temperatures from fractionated sample, and different morphological growth features obtained are compared with those observed previously from unfractionated sample. Several new growth features like rectangular single crystals, twinned crystals, ovals and spherulites have been observed. The role of different typical growth features for the development of spherulites has been studied. It seems that the proposed growth mechanism for the development of spherulite grown either from the melt or concentrated solution is the same for different polymers. From the observed growth features of dendritic nature in different conditions, a mechanism of development of dendritic spherulite is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01775410
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  • 8
    Electronic Resource
    Electronic Resource
    Selective and sensitive extraction-photometric determination of vanadium(V) withN-hydroxy-N-p- chlorophenyl-N'-(3-chloro-4-methylphenyl)-p-toluamidine in the presence of carboxylic acids (1979)
    Springer
    Microchimica acta 72 (1979), S. 53-61 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein einfaches, schnelles, empfindliches und hochselektives Verfahren zur Extraktion und photometrischen Bestimmung von Mikromengen Vanadin (V) wurde beschrieben. Es beruht auf der Bildung des Komplexes VO(OAm)2OH durch Umsetzung von V(V) mitN-Hydroxy-N-p-Chlorphenyl-N'-(3-Chlor-4-Methylphenyl)-p-Toluamidin und Extraktion als 1∶1-Addukt [VO(OAm)2OH∶L] mit verschiedenen Carbonsäuren in Chloroform (wobei HOAm=N-Hydroxyamidin und L=Carbonsäure). Die Art der Carbonsäuren hat großen Einfluß aufλ max undɛ der ternären Komplexe. Die Ausscheidereagenzien wie z. B. Oxal-, Bernstein-, Fumar-, Zitronen-, Weinsäure usw. werden auch als Synergisten bei der Extraktion von V(V) verwendet. Die molaren Extinktionen der Extrakte liegen zwischen 3100 und 6700 1 · Mob-1 · cm-1. Fe3+, Cu2+, Zn2+, Co2+, Ni2+, Cr3+, Mn2+, Ti4+, Zr4+, Mo6+ und W6+ stören nicht. Das Verfahren wurde auf verschiedene Legierungen angewendet.
    Notes: Summary A simple, rapid, sensitive and highly selective method for extraction-photometric determination of microamounts of vanadium(V) is described. The method is based on the formation of the VO(OAm)2-OH complex by the reaction of vanadium(V) withN-hydroxy-N-p-chlorophenyl-N'-(3-chloro-4-methylphenyl)-p-toluamidine, and its extraction into chloroform as 1∶1 adducts [VO(OAm)2OH∶L] (where HOAm=theN-hydroxyamidine and L=carboxylic acid) with various carboxylic acids. The nature of carboxylic acids has large effect in theλ max andɛ of ternary complexes. The sequestrating agents e. g. oxalic, succinic, fumaric, citric, tartraric acid have been also used as a Synergist in the extraction of vanadium(V). Apparent molar absorptivities of the extracts lie in the range of 3100–6700 l · mole−1 · cm−1. Fe3+, Cu2+, Zn2+, Co2+, Ni2+, Cr3+, Mn2+, Ti4+, Zr4+, Mo6+ and W6+ do not interfere. The method has been applied to various alloys.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198048
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  • 9
    Electronic Resource
    Electronic Resource
    The extractive-photometric determination of Iron(III), vanadium(V) and molybdenum(V) as mixed complexes with thiocyanate and N-hydroxy-N-(p-chlorophenyl)-N′-(2,3-dimethylphenyl)-p-toluamidine hydrochloride (1979)
    Springer
    Microchimica acta 71 (1979), S. 353-360 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung N-Hydroxy-N-(p-chlorphenyl)-N′-(2,3-dimethylphenyl)-p-toluamidinhydrochlorid reagiert mit Fe(III), V(V) und Mo(V) in thiocyanathältigem Medium unter Bildung wasserunlöslicher, gemischter Komplexe, die sich mit Benzol extrahieren lassen. Die großen Unterschiede der für die Bildung dieser Komplexe erforderlichen analytischen Bedingungen bieten die Voraussetzung für eine einfache, rasche und empfindliche extraktions-photometrische Methode zur Bestimmung dieser Elemente im Mikrogramm-Maßstab. Cr(III), Mn(II), W(VI), Ti(IV) und Zr(IV) stören nicht. Das Verfahren wurde an Hand künstlicher Gemische erprobt.
    Notes: Summary N-Hydroxy-N- (p- chlorophenyl)-N′-(2,3-dimethylphenyl)-p-toluamidine hydrochloride reacts with Fe3+, V5+ and Mo5+ in thiocyanate media, giving water-insoluble mixed complexes, extractable into benzene. The large differences in the analytical conditions for formation of the mixed complexes of these elements affords a simple, rapid and sensitive extraction-photometric method for determination of these elements at microgram levels. Cr3+, Mn2+, W6+, Ti4+ and Zr4+ do not interfere. The method has been applied for determination of these elements in artificial mixtures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197405
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  • 10
    Electronic Resource
    Electronic Resource
    Parallel computation and numerical optimisation (1984)
    Springer
    Annals of operations research 1 (1984), S. 135-149 
    Details
    ISSN: 1572-9338
    Keywords: Optimisation ; parallel computation ; DAP ; SIMD ; MIMD ; speed-up
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract In this paper we will consider the effect of introducing parallel computers to solve optimisation problems. We briefly highlight four situations where most improvements are likely. We consider the possible interaction of the four classifications with the currently available parallel processing machines. A brief description of one of the parallel systems, ICL DAP, is outlined. We have implemented two parallel (SIMD) algorithms, one for local optimisation and the other for global optimisation, on the ICL DAP. Numerical results, together with the processing times, are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01876144
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