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  • 1
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 1 (1969), S. 90-92 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In order to discuss hydrogen transfer in the skeletal fragmentation of thioethers on electron impact, mass spectra of a series of 2-n-alkylthio-5-aminothiazolo [5,4-d]pyrimidines have been determined. To aid the interpretation of the hydrogen migration, deuterium-labeled compounds which are substituted with deuterium in each position of 2-n-butylthio-5-aminothiazolo-pyrimidines were studied. By correlation of the spectra obtained from such labeled compounds, the initial hydrogen migration in the fragmentation to produce [M — SH], [MS — CH3] and m/e 184 ions is concluded to be as follows: migration of the α-hydrogen atom to the sulfur induces formation of the [M — SH] ion; migration of the β-hydrogen atom to the sulfur or nitrogen atom by a McLafferty rearrangement induces formation of the m/e 184 ion; and migration of γ-hydrogen atom to the sulfur induces formation of the [M — SCH3] ion.
    Additional Material: 2 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 521-522 
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 29 (1995), S. 1451-1457 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Gas chromatography was employed to quasi-continuously determine the amount of carbon dioxide that evolved from carbonate apatite specimens during sintering. Assuming that the carbonate in the specimens decomposed to carbon dioxide on a mole-for-mole basis, the determination of the carbon dioxide evolved allowed for the determination of the amount of carbonate that remained in the specimens during different stages of sintering. Previously, this measurement could be carried out only after sintering was completed. Comparison of data obtained from specimens compacted isostatically at 600 MPa for sintering with powder specimens indicated that the amount of carbonate remaining in the sintered apatite mass strongly depended on heating rates, heating temperatures, and holding-time intervals. © 1995 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 417-424 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Bioluminescenz des amerikanischen Leuchtkäfers Photinus beruht auf der Reaktion von 2-(6-Hydroxybenzthiazol-2-yl)-Δ2-1,3-thiazolin-4-carbonsäure („Photinus-Luciferin“) mit dem Enzym Luciferase in Gegenwart von ATP und Magnesium-Ionen. Im Muschelkrebs Cypridina wird die Bioluminescenz dagegen durch die Reaktion einer Luciferase mit 8-(3-Guanidino-propyl)-6-indol-3-yl-2-(1-methyl-propyl)-3,7-dihydroimidazo[1,2-a]-pyrazin-3-on („Cypridina-Luciferin“) hervorgerufen. Latia-Luciferin ist 1,3,3-Trimethyl-2-(4-formyloxy-3-methyl-3-butenyl)-1-cyclohexen. Das Luciferin der Federkoralle Renilla ist ein noch nicht genau identifiziertes Tryptaminderivat; die Luciferine anderer leuchtender Organismen sind noch unbekannt.  -  Vorstellungen über den Ablauf der Luciferin-Luciferase-Reaktion und zahlreiche Spektren runden diese Übersicht ab.
    Additional Material: 10 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Gamete Research 16 (1987), S. 79-82 
    ISSN: 0148-7280
    Keywords: fetal sex ratio ; mice ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: We examined whether or not the sex of the fetuses of polytocous animals distributes randomly in the position along the uterine horn in 255 mouse litters. The fetal sex ratio did not differ significantly among the three intrauterine segments (ovarian, middle, and cervical). Based on the number of fetuses examined in this study, it can be stated that even if sex ratio differences exist among the segments, the ratio in individual segments would fall mostly inside the ±0.1 range, when the overall sex ratio (M/(M+F)) is around 0.5.
    Additional Material: 2 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 7 (1968), S. 407-414 
    ISSN: 0570-0833
    Keywords: Luciferin ; Bioluminescence ; Luminescence ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The bioluminescence of the American firefly Photinus is due to the reaction of 2-(6-hydroxybenzothiazol-2-yl)-Δ2-1,3-thiazoline-4-carboxylic acid (“firefly luciferin”) with the enzyme luciferase in the presence of ATP and magnesium ion. In the crustacean Cypridina, on the other hand, the bioluminescence is due to the reaction of a luciferase with 8-(3-guanidinopropyl)-6-indol-3-yl-2-(1-methylpropyl)-3,7-dihydroimidazo[1,2-a]-pyrazin-3-one (“Cypridina luciferin”). The luciferin in Latia is 1,3,3-trimethyl-2-(4-formyloxy-3-methyl-3-butenyl)-1-cyclohexene and that in Renilla is a tryptamine derivative that has not yet been accurately identified; the luciferins of other luminescent organisms are not yet known. A review is given of the investigations which have been carried out on the above luciferins and the course of the luciferin-luciferase reaction is examined. Numerous spectral data obtained during the examination of these compounds are included in the text.
    Additional Material: 10 Ill.
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