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  • LUNAR AND PLANETARY EXPLORATION  (717)
  • Analytical Chemistry and Spectroscopy  (516)
  • AIRCRAFT PROPULSION AND POWER
  • Animals
  • 1975-1979  (1.476)
  • 1975  (1.476)
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Schlagwörter
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Erscheinungszeitraum
  • 1975-1979  (1.476)
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    The ultrastructure, catecholamine, and prolactin contents of the rostral pars distalis of the fish Mugil platanus after reserpine or 6-hydroxydopamine administration (1975)
    Springer
    Cell & tissue research 162 (1975), S. 551-563 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Hypophysis ; Rostral pars distalis ; Mugil platanus ; Animals ; Prolactin hormone secretion
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The rostral pars distalis (RPD) of the teleost Mugil platanus from animals pretreated with reserpine or 6-hydroxydopamine (6-HODA) were assayed for dopamine (DA) or noradrenaline (NA) or for prolactin hormone. Such determinations were coupled with electron microscopy. It was found that reserpine and 6-HODA produced a significant decrease in the content of DA, NA, and prolactin. Electron microscope studies revealed that prolactin cells became activated as judged by ultrastructural criteria. After 6-HODA treatment type “B” neurosecretory fibers entering the RPD became selectively destroyed. These observations lead us to suggest that prolactin secretion is under inhibitory control by type “B” neurosecretory fibers of adrenergic nature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00209354
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  • 2
    Digitale Medien
    Digitale Medien
    Editorial (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 1-1 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020102
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  • 3
    Digitale Medien
    Digitale Medien
    Plasma amino acid analysis by isotope ratio gas chromatography mass spectrometry computer techniquesTAB = N-trifluoroacetyl n-butyl ester; NBTMS = N-neopentylidine n-butylester trimethylsilyl ether; TCA = trichloroacetic acid; EGA = ethylene glycol adipate. (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 9-14 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: A routine analysis for micro samples of plasma amino acids by a gas chromatography mass spectrometry computer system has been developed. Isotope ratio determination was used as the quantitating technique via multiple internal standards. The speed of the analysis is increased by omitting the ion exchange purification step and its flexibility is maximized by using repetitive scanning rather than selective ion monitoring. This procedure yields excellent precision and accuracy, as demonstrated by the analysis of a known amino acid mixture and of neonatal plasma.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020104
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  • 4
    Digitale Medien
    Digitale Medien
    The rapid identification of a new metabolite of warfarin via a chemical ionization mass spectrometry ion doublet technique (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 23-30 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: An ion doublet chemical ionization mass spectrometry technique was utilized for the rapid detection and elucidation of the structure of a new hydroxylated metabolite of the oral anticoagulant warfarin. This technique involves the use of a 50:50 mixture of stable isotope labeled and unlabeled drug. With this procedure ions found in the mass spectrum which are associated with the administered drug can be identified unambiguously. The unknown metabolite from rat liver microsomal preparations was identified as benzylic hydroxywarfarin by reincubating the microsomes with warfarin specifically labeled in the benzylic position and observing the subsequent loss of label in the product. The ion doublet technique was also employed in a single human study, and benzylic hydroxywarfarin was detected and identified.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020106
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  • 5
    Digitale Medien
    Digitale Medien
    The mass spectra of permethylated oligosaccharides (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 36-45 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The electron impact mass spectra of permethyl ethers of twenty-five highly purified oligosaccharides, containing first, aldohexose units only and second, at least one fructose unit, have been determined. It is concluded that spectra of these derivatives can yield considerable structural information, especially in relation to the detection of fructose units, the pyranose/furanose ratio and the position of the glycosidic linkage, and are to be preferred from this point of view to the mass spectra of trimethylsilyl ethers.
    Zusätzliches Material: 8 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020108
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  • 6
    Digitale Medien
    Digitale Medien
    Species differences in the metabolism of α-1-trans-4-dimethylaminotetrahydro-3-furylcyclohexanephenylglycolate, an experimental anticholinergic agent (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 53-58 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Metabolism studies in the rat, dog and cat have demonstrated a definite species difference in biotransformation and elimination of α-1-trans-4-dimethylaminotetrahydro-3-furylcyclohexanephenylglycolate (Lilly 82537), an experimental anticholinergic agent. Separation and identification of urinary and biliary metabolites by gas chromatographic mass spectrometric analysis has shown three mechanisms to be involved in the metabolism of Lilly 82537 in these species; N-demethylation, aliphatic hydroxylation and ester hydrolysis. A major portion of the drug administered was eliminated unaltered in the cat and dog, while only trace quantities of parent drug were observed in the urine and bile of rats. These metabolic differences may be responsible for observed species differences in the pharmacologic activity of Lilly 82537.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020110
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  • 7
    Digitale Medien
    Digitale Medien
    News (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. vii 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020114
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  • 8
    Digitale Medien
    Digitale Medien
    Masthead (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975) 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020201
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  • 9
    Digitale Medien
    Digitale Medien
    Mass spectra of spirostanol and furostanol glycosides (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 65-77 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The electron impact mass spectra of twenty acetates and methylates of spirostanol and related furostanol glycosides of high molecular weight (above 650) have been investigated, and the most probable fragmentation patterns of the glycoside derivatives are presented. High resolution mass spectrometry provides useful information concerning the structures of both aglycone and sugar moieties as well as the molecular size of the oligoglycosides.
    Zusätzliches Material: 21 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020202
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  • 10
    Digitale Medien
    Digitale Medien
    Electron impact mass spectral studies of hydrazine monoamine oxidase inhibitor drugs (1975)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 2 (1975), S. 82-89 
    Details
    ISSN: 1052-9306
    Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Identification of hydrazine monoamine oxidase inhibitor drugs such as isoniazid, iproniazid, nialamide, isocarboxazid and iproclozide is made by electron impact mass spectrometry using the direct insertion technique. The molecular ion itself, although of low relative abundance, is found in the mass spectra of all compounds studied. Relative intensities of the major fragments and data on metastable ions useful in the identification of these compounds are reported. With the aid of synthesized structurally related products, deuterium labelling of exchangeable hydrazidic and hydrazinic protons and by the use of hexadeuterated isopropylic analogues, detailed information about fragmentation patterns is obtained. Splitting processes are chiefly governed by the nature of the aromatic substituent at the hydrazidic end and the alkyl sidechain located at the second hydrazinic nitrogen. The major fragmentations occurring are loss of small neutral molecules, double rearrangement, cleavage of the N—N bond, amide bond rupture, β-cleavage to the hydrazinic nitrogen atom and McLafferty rearrangements.
    Zusätzliches Material: 1 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bms.1200020204
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