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  • Wiley-Blackwell  (924)
  • 1975-1979  (924)
  • 1978  (924)
  • 1
    Electronic Resource
    Electronic Resource
    Etude en RMN du 13C de Mérocyanines Benzimidazoliniques (1978)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 11 (1978), S. 493-498 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A series of α-oxobenzimidazolinic merocyanines differently substituted on the ‘phenolate’ part and bearing a paraffinic chain on one heterocyclic nitrogen, has been studied by 13C NMR. Electron donating substituents bring about an increase of the electronic density on the 3 methine carbon and an increase of the alternation of electron density on the 3,4-dimethine bridge. A bathochromic shift of the lower energy electronic transition is also observed. Furthermore, the low field resonance of the 3 methine proton is probably due to a specific interaction between this proton and the ‘phenolate’ oxygen atom. This implies the existence of a favoured trans configuration for merocyanine dyes.
    Notes: Une série de mérocyanines α-oxo benzimidazoliniques diversement substituées sur la partie ‘phénolate’ et possédant une chaǐne grasse sur l'un des azotes hétérocycliques, a été étudiée en RMN du carbone- 13. Des substituants donneurs d'électrons provoquent une augmentation de la densité électronique sur le carbone méthinique C-3 et une augmentation de l'alternance de la distribution de charge sur le pont diméthinique 3,4. Corrélativement un déplacement bathochrome de la transition électronique de plus basse énergie est observé. Par ailleurs, l'apparition de la résonance à champ faible du proton méthinique H-3 semble due à une interaction spécifique intervenant entre ce proton et l'atome d'oxygène ‘phénolate’, ce qui suppose l'existence d'une configuration trans privilégiée pour les mérocyanines.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270111004
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  • 2
    Electronic Resource
    Electronic Resource
    Metabolism of the enantiomers of 2-hydroxy-N-cyclopropylmethylmorphinan in dog and man (1978)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1978), S. 498-507 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The major metabolic pathway of the (-) enantiomer and the (+) enantiomer of 2-hydroxy-N-cyclopropylmethylmorphinan in dogs was shown to be conjugation with glucuronic acid and/or sulfate. Gas chromatography mass spectrometry, nuclear magnetic resonance spectroscopy and X-ray crystallography were used to identify additional metabolites of the two enantiomers in dog urine after hydrolysis with Glusulase. Metabolites of the (-) enantiomer were identified as 2-hydroxymorphinan and 2,7β-dihydroxy-N-cyclopropropylmethylmorphinan. The major metabolites of the (+) enantiomer in hydrolyzed dog urine were identified as 2-hydroxymorphinan, 2,3-dihydroxy-N-cyclopropylmethylmorphinan and 2-methoxy-3-hydroxy-N-cyclopropylmethylmorphinan. In addition, tentative or partial structures were postulated for three minor metabolites of the (+) enantiomer: 2-methoxy-3-hydroxymorphinan, a metabolite containing a hydroxyl group on either carbon 4, 5, 6 or 7 and a methylated catechol metabolite containing a hydroxyl group on carbon 4, 5, 6 or 7. Thus, the major oxidative pathways of the (-) enantiomer were N-dealkylation and aliphatic hydroxylation, while the (+) enantiomer mainly underwent N-dealkylation and aromatic hydroxylation, followed by phenolic methylation. Analysis of urine from a human subject administered the (-) enantiomer suggested that the metabolism of this isomer by man was similar to its metabolism by dog.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200050808
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  • 3
    Electronic Resource
    Electronic Resource
    Investigation of the unit operations involved in the continuous flow isolation of β-galactosidase from Escherichia coli (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 159-182 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A 1000 liter fermentor has been used to produce a continuous feed of Escherichia coli containing a high level of β-galactosidase. We have investigated the individual unit operations for the isolation of the enzyme: cell disruption, nucleic acid removal, protein precipitation, and solid-liquid separation after each stage. Using the information obtained we have been able to operate a semicontinuous process which when fully continuous would yield 100 g protein/hr, comprising 23% β-galactosidase.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260200202
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  • 4
    Electronic Resource
    Electronic Resource
    Large scale preparation of purified exocellular DD-carboxypeptidase-transpeptidase of Streptomyces strain R61 (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 577-587 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The exocellular DD-carboxypeptidase-transpeptidase that Streptomyces R61 excretes during growth has been produced in large fermentation units of 15 m3 total capacity. The yield from 15,000 liter culture filtrate was 1.080 g purified enzyme (92% purity) with a total recovery of 29% and at least a 2000-fold increased specific activity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260200409
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  • 5
    Electronic Resource
    Electronic Resource
    Propriétés des esters d'énols I. Polymérisation d'acétoxyalcènes et études diélectriques des polymères obtenus (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 72 (1978), S. 45-55 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polymerization of acetoxy-2 styrene, parachloro acetoxy-2 styrene, paramethyl acetoxy-2 styrene and paranitro acetoxy-2 styrene was carried out by means of free radical initiators or by thermic reaction. The polymers therefrom showed molecular weights of about 200 000. Studies on the thermal behaviour reveal that these polymers do not undergo any change of phase, either vitreous or crystalline. Dielectric experiments show losses of about 10-3 radian; the losses are practically constant within a large scale of temperature and frequency. Over 320°K one notices a relaxation process of small magnitude and the presence of water brings about a marked change in the way the polymer reacts to dielectric treatment.
    Notes: La polymérisation de I'acttoxy-2 styrène, du parachloro acétoxy-2 styrène, du paramb thyl acétoxy-2 styrène et du paranitro acetoxy-2 styrène a été obtenue avec des amorceurs radicalaires ou par voie thermique. Les polymtres obtenus possedent des masses moyennes en nombre atteignant 200000. L'étude du comportement thermique permet d'établir que ces polymtres ne presentent pas de transition de phase, vitreuse ou cristalline. L'étude diklectrique de ces polymtres a été effectue: on releve des pertes de I'ordre de 10-3 radian, pratiquement constantes dans un large domaine de temphture et de fréquence. Au-delà de 320°K on décèle un mkanisme de relaxation de faible amplitude et la presence d'eau modilie sensiblement son comportement diélectrique.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050720104
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  • 6
    Electronic Resource
    Electronic Resource
    Reactive polymers. XII. Bead macroporous methacrylate terpolymers containing aldehyde groups (1978)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 66 (1978), S. 75-93 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Makroporöse Perl-Terpolymere aus Methacrylaldehyd, Methylmethacrylat und äthylendimethacrylat wurden hergestellt. Die Polymerisationsbedingungen (Zusammensetzung der Monomermischung und der inerten Phase, die Konzentration an Initiator und an Suspensionsstabilisator, Rühregeschwindigkeit) werden im Hinblick auf die Eigenschaften der Terpolymeren (Porosität und Konzentration an reaktiven Aldehydgruppen) diskutiert.Die Konzentration an reaktiven Gruppen wurde durch Zugabe des dritten Monomeren variiert. Die analytisch bestimmten Unterschiede in der Konzentration an reaktiven Gruppen im Monomerengemisch und im Polymeren werden interpretiert (a) durch Unerreichbarkeit der Gruppen im Innern der Substanz, (b) durch Bildung von Tetrahydropyranringen und Acetatbin lungen zwischen den Ketten und (c) duch Bildung von extrahierbaren Polymeren und Copolymeren sowie nichtumgesetzten Anteilen an Monomeren.
    Notes: Bead macroporous terpolymers of methacrylaldehyde with methyl methacrylate and ethylene dimethacrylate were prepared. Preparation conditions (composition of the monomer mixture, of the inert components, concentration of the initiator and of the suspension stabilizer, and the rate of stirring) were discussed with respect to the properties of the terpolymers (porosity and concentration of reactive aldehyde groups).Concentration of reactive groups in the polymer was controlled by adding a third monomer. The analytically determined differences in the concentration of the reactive groups in the batch and in the polymer were interpreted (a) by the inaccessibility of the groups within the polymer bulk (for polymers with 30-50 mol-% of crosslinking agent), (b) by the presence of tetrahydropyran rings or acetate bonds between the chains, and (c) by the formation of extractable soluble polymers or copolymers, or by not reacting of parts of the monomers (observed predominantly with low-crosslinked polymers containing 10 mol-% of crosslinking agent).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1978.050660107
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  • 7
    Electronic Resource
    Electronic Resource
    A selected ion monitoring method for glutethimide and six metabolites: Application to blood and urine from humans intoxicated with glutethimideAbbreviation: TFAA = trifluoroacetic anhydride. (1978)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1978), S. 679-685 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A method employing selected ion monitoring for the analysis of glutethimide and six of its metabolites has been developed. Hydroxylated metabolites analyzed as trifluoroacetates, included 4-hydroxyglutethimide, (1-hydroxyethyl)glutethimide and p-hydroxyglutethimide. The unchanged drug, 3-dehydroglutethimide, desethylglutethimide and the internal standard, [2H5]glutethimide, were chromatographed underivatized on OV-225. The assay was used to measure drug and metabolites in the plasma and urine of patients intoxicated with glutethimide. High levels (e.g. 20-35 μg ml-1) of unconjugated 4-hydroxyglutethimide, an active metabolite, were found in all patients at a time when levels of unchanged drug were lower and declining. Other unconjugated and conjugated metabolites were found in relatively low concentrations in the plasma (i.e. 〈 4 μg ml-1). The major urinary metabolites were conjugates of 4-hydroxyglutethimide and (1-hydroxyethyl)glutethimide. The unchanged drug and other conjugated and unconjugated metabolites were found in lower amounts in the urine. Normal plasma half-lives of glutethimide and the relatively small amounts in urine of unchanged drug and unconjugated metabolites indicated that drug elimination was not markedly impaired in the intoxicated patients.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200051209
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  • 8
    Electronic Resource
    Electronic Resource
    Poly(vinylidene fluoride) with low content of head-to-head chain imperfections (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 16 (1978), S. 3039-3044 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.170161135
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  • 9
    Electronic Resource
    Electronic Resource
    Localized radiation grafting of flame retardants to polyethylene terephthalate. II. Vinyl phosphonates (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 2403-2414 
    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: Six vinyl phosphonates have been synthesized and evaluated as grafts on poly(ethylene terephthalate) for their flame retardance properties. Diethylvinyl phosphonate was used as a model for phosphorus-containing flame retardants in developing the methodology for localizing flame retardants either on the surface of the filament or uniformly throughout it. SEM-X-ray microprobe techniques were used in the verification of the location of the flame retardant in the filament. The flame retardance efficiency of poly(diethyl vinyl phosphonate) was then correlated with its location in the filament. Other grafted phosphorus-containing flame retardants showed a range of efficiencies that depended not only upon the location of the graft within the filament but also upon the %P in the compound. The wide variations in flame retardance efficiencies of copolymers and terpolymers were attributed to large variations in the melt viscosity of the different grafted materials. The grafts showed only small changes in tenacity and large increases in elongation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1978.070220901
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  • 10
    Electronic Resource
    Electronic Resource
    Identification et Etude en Résonance Magnétique Nucléaire du Carbone-13 des Produits de la Réaction de Quaternisation en Série Thiazolo[3,2-d]tétrazolique (1978)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 11 (1978), S. 507-509 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: We have demonstrated that the compounds obtained by quaternization of thiazolo[3,2-d]tetrazole, and two of its derivatives, 3-phenyl-thiazolo[3,2-d]tetrazole and tetrazolo[5,1-b]benzothiazole, are tetrazolium salts. The quaternization effects are discussed as a function of the 13C NMR results.
    Notes: Nous avons montré que les produits obtenus lors de la quaternisation du thiazolo[3,2-d]tétrazole, et de deux de ses dérivés, phényl-3 thiazolo[3,2-d]tétrazole et tétrazolo[5,1-b]benzothiazole, sont des sels de tétrazolium. Nous avons discuté des effets dus à la quaternisation en fonction des résultats de la RMN du 13C.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270111007
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