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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 254 (1975), S. 538-538 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In a new approach to this problem we carried out the crystallisation of DL-NaNH4 tartrate in the presence and absence of chiral p particles from 3aP. Below 27 C, DL-NaNH4 tartrate crystallises in racemic conglomerates18, that is, D and L crystallisation centres form independently and then grow. Any ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 190-191 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The hydrochloride of the polypeptide derivative which was prepared from polymethyl-a-poly-L-glutamate with ethylenediamine, in particular, was examined, and is now produced by Chinoin Chemical and Pharmaceutical Works Co., Budapest, for clinical experiments under the name of 'Polyanthin'. ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 266-267 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] From these observations and the fact that a number of naturally occurring antibiotics (for example, tyrocidine and polymyxins) have peptide structures and basic characters, it may be assumed that the microbiological activity of these compounds depends fundamentally on these structures and ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of neural transmission 22 (1961), S. 184-191 
    ISSN: 1435-1463
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Authors examined the epinephrine and norepinephrine content of the hypothalamus and frontal brain portions, respectively, of rats with the v. Euler-Floding's fluorimetric method. The results show that the hypothalamus—as compared with the frontal brain portions—contains more epinephrine and mainly a larger quantity, of norepinephrine. Adrenalectomy, castration, hypophysectomy, administration of nicotine and insulin, respectively, does not change, under the experimental conditions used, essentially the catecholamine content of the hypothalamus. The quantity of norepinephrine of the hypothalamus and the frontal brain portions increases in thyreoidectomized rats. Reserpine administration, on the other hand, results in a significant decrease of the norepinephrine content of the hypothalamus.
    Abstract: Résumé Les auteurs ont étudié le contenu de l'adrénaline et de la nor-adrénaline de l'hypothalamus des rats, quant à la partie frontale de leurs encéphales d'après la méthode de fluorimétrie de v. Euler-Floding. Les résultats démontrent que l'hypothalamus—par rapport à la partie frontale de l'encéphale—contient plus d'adrénaline et une quantité remarquable de la noradrénaline. Ils ont enregistré que le contenu d'adrénaline et de la nor-adrénaline de l'hypothalamus n'a pas été altéré ni par la castration et par l'adrénalectomie ou par l'hypophysectomie, non plus par l'administration de la nicotine ou d'insuline dans les circonstances expérimentales appliquées. Dans les rats thyréoidectomisés la quantité de la nor-adrénaline de la partie frontale de l'encéphale et de l'hypothalamus est augmentée. La posologie de réserpine, par contre, a pour résultat une forte diminution du contenu de la nor-adrénaline de l'hypothalamus et de la partie frontale de l'encéphale.
    Notes: Zusammenfassung Die Verfasser haben den Adrenalin- und Noradrenalingehalt des Hypothalamus bzw. der frontalen Gehirnabschnitte von Ratten mit Hilfe der v.-Euler-Flodingschen Methode fluorimetrisch bestimmt. Die Ergebnisse zeigen, daß der Hypothalamus im Verhältnis zu den frontalen Gehirnpartien mehr Adrenalin und besonders größere Mengen Noradrenalins enthält. Adrenalektomie, Kastration, Hypophysektomie, Nikotin- bzw. Insulinverabreichung führten im Adrenalin- und Noradrenalingehalt des Hypothalamus unter den angewandten Versuchsbedingungen keine wesentlichen Veränderungen herbei. Im Hypothalamus und in den frontalen Gehirnregionen thyreoidektomierter Ratten war die Noradrenalinmenge erhöht. Reserpinverabreichung bewirkte eine beträchtliche Herabsetzung des Noradrenalingehaltes im Hypothalamus und in den frontalen Gehirnabschnitten.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 20 (1964), S. 393-394 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Tetracyclin wird in mit vorübergehender Ischämie oder mit verschiedenen Nephrotoxinen geschädigten Tubulusepithelzellen intensiver gespeichert. Diese zunehmende Speicherung ist bereits nachweisbar, wenn histologische Veränderungen noch unausgeprägt sind. Die Untersuchung der tubulären Tetracyclinaufnahme ist auch für die Beurteilung renaler Blutverteilungsänderungen wertvoll.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 32 (1976), S. 742-744 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Fine structural studies of various endocrine adenomas indicate that mitochondria may serve as progenitors of centrioles and cilia.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1202-1204 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Electron microscopy of the liver of methotrexate-treated psoriatic patients revealed junctional abnormalities consisting of detachment of desmosomal plaques between hepatocytes. Mitochondria anchoring desmosomal microfilaments were frequently noted.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 51 (1964), S. 64-64 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular evolution 10 (1977), S. 161-166 
    ISSN: 1432-1432
    Keywords: Induced resolution ; Chiral influence ; Sodium-ammonium tartrate ; Origin of optical activity ; Stereoselective crystallization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Isothermal crystallization of D,L-sodium-ammonium tartrate with traces of different impurities admixed shows that the added chiral contaminations produce a preferential crystallization of the tartrate isomer of same handedness. The critical lowest concentration of effective seeding agents is 0.1-0.5 %. 1 % optically active excess material induces 1.0-3.6 % optical purity in the deposited crystals. An analysis of the relevant data reported so far gives similar figures in different crystallization systems. The relation of the results to the suggested lattice energy difference between enantiomers is discussed.
    Type of Medium: Electronic Resource
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