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  • LUNAR AND PLANETARY EXPLORATION  (2)
  • chicken  (2)
  • 1H  (1)
  • 2D NMR Steroids  (1)
  • Engineering General
  • 1995-1999
  • 1985-1989  (7)
  • 1945-1949
  • 1988  (7)
Collection
Keywords
Publisher
Years
  • 1995-1999
  • 1985-1989  (7)
  • 1945-1949
Year
  • 1
    Electronic Resource
    Electronic Resource
    The amylase gene-enzyme system of chickens. I. Allozymic and activity variation (1988)
    Springer
    Biochemical genetics 26 (1988), S. 747-755 
    Details
    ISSN: 1573-4927
    Keywords: amylase ; chicken ; variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Amylase allozymic and activity variation was studied in three flocks of chickens (Gallus domesticus). Individuals from one flock were studied to assess the effects of sex, tissue, and genotype on amylase activity. Additionally, the allozymes were purified and their specific activities compared. Variation was observed within and among the flocks. Two alleles were found to be segregating in the flocks, one flock being polymorphic and the other two monomorphic. Mean amylase activities among the three flocks were significantly different. The relationship of this activity variation to regulatory variation is discussed. There were no significant effects of sex or genotype on amylase activity and, in most cases, no correlation between activities in the various tissues. However, in heterozygotes one of the alloamylases had much lower activity than the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553873
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The amylase gene-enzyme system of chickens. I. Allozymic and activity variation (1988)
    Springer
    Biochemical genetics 26 (1988), S. 747-755 
    Details
    ISSN: 1573-4927
    Keywords: amylase ; chicken ; variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Amylase allozymic and activity variation was studied in three flocks of chickens (Gallus domesticus). Individuals from one flock were studied to assess the effects of sex, tissue, and genotype on amylase activity. Additionally, the allozymes were purified and their specific activities compared. Variation was observed within and among the flocks. Two alleles were found to be segregating in the flocks, one flock being polymorphic and the other two monomorphic. Mean amylase activities among the three flocks were significantly different. The relationship of this activity variation to regulatory variation is discussed. There were no significant effects of sex or genotype on amylase activity and, in most cases, no correlation between activities in the various tissues. However, in heterozygotes one of the alloamylases had much lower activity than the other.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02395520
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Application of relayed coherence transfer two-dimensional nuclear magnetic resonance spectroscopy to the assignment of 1H chemical shifts in steroids (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 214-223 
    Details
    ISSN: 0749-1581
    Keywords: RELAY 2D NMR ; 1H NMR ; 2D NMR Steroids ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Relayed coherence transfer (RELAY) two-dimensional NMR spectroscopy was demonstrated to be an effective technique for overcoming the problem of overlapping multiplets in the analysis of the 1H NMR spectra of steroids. Cross-sections through appropriate proton resonances resulted in resolved spectra of the spin systems for each of the saturated rings of the estrogenic hormones 17β- and 17α-estradiol. During RELAY experiments with a fixed delay time of 0.042 s it was possible to observe RELAY cross-peaks between H-11α and 18-CH3 which resulted from magnetization transfer via long-range coupling between 18-CH3 and H-12α. The difference in stereochemistry at C-17 of these estradiol epimers allowed an examination of the effect of substituent configuration on the RELAY cross-peak intensity in order to determine the ability of the RELAY method to provide qualitative structural information.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260260308
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  • 4
    Electronic Resource
    Electronic Resource
    Identification of C-glycopyranosides and C-glycofuranosides by 13C NMR and 1H NMR. Complete assignment of their spectral data using carbon-proton chemical shift correlation spectroscopy (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 1062-1067 
    Details
    ISSN: 0749-1581
    Keywords: 1H ; 13C NMR 2D NMR ; C-Glycopyranosides ; C-Glycofuranosides ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: C-Glycopyranosides and C-glycofuranosides were identified using 13C and 1H chemical shift and coupling constant data. Full assignments for all α- and β-anomers were made possible by recourse to carbon-proton chemical shift correlation spectroscopy. Greater steric shielding effects were observed on the carbon atoms in cis-1,2-substituted compounds compared with their trans counterparts. Consistent proton chemical shift differences were also noted in that the anomeric protons resonate at lower field in all cis-1,2-isomers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260261206
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  • 5
    Electronic Resource
    Electronic Resource
    Convergence of transverse shear stresses in the finite element analysis of platesThis research was sponsored by the U.S. Office of Naval Research under Contract N00014-84-K-0600 (Scientific Officer: Dr. Alan Kushner). (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 4 (1988), S. 185-187 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: If bending moments converge at a sufficiently fast rate, it is proved that transverse shear stress resultants calculated from the moment equilibrium equation also converge. The result holds independent of the plate theory or type of element employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630040208
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  • 6
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    Apollo 15 yellow-brown volcanic glass - Chemistry and petrogenetic relations to green volcanic glass and olivine-normative mare basalts (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Electron microprobe and INAA were used to analyze forty spherules of Apollo 15 yellow-brown glass for major and trace elements. The glass is one of twenty-five high-Mg primary magmas emplaced on the lunar surface in pyroclastic eruptions. The abundances show that the magma was produced by partial melting of differentiated cumulates in the lunar mantle. Models to explain the possible source-regions of several Apollo 15 and Apollo 12 low-Ti mare magmas are presented.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geochimica et Cosmochimica Acta (ISSN 0016-7037); 52; 2379-239
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Apollo 16 regolith breccias and soils - Recorders of exotic component addition to the Descartes region of the moon (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Using the subdivision of Apollo 16 regolith breccias into ancient (about 4 Gyr) and younger samples (McKay et al., 1986), with the present-day soils as a third sample, a petrologic and chemical determination of regolith evolution and exotic component addition at the A-16 site was performed. The modal petrologies and mineral and chemical compositions of the regolith breccias in the region are presented. It is shown that the early regolith was composed of fragments of plutonic rocks, impact melt rocks, and minerals and impact glasses. It is found that KREEP lithologies and impact melts formed early in lunar history. The mare components, mainly orange high-TiO2 glass and green low-TiO2 glass, were added to the site after formation of the ancient breccias and prior to the formation of young breccias. The major change in the regolith since the formation of the young breccias is an increase in maturity represented by the formation of fused soil particles with prolonged exposure to micrometeorite impacts.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Earth and Planetary Science Letters (ISSN 0012-821X); 89; 2 Ju
    Format: text
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    NASA TECHNICAL REPORTS
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