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  • (Yeast)  (4)
  • Drosophila ananassae  (4)
  • Physics  (4)
  • 1
    Digitale Medien
    Digitale Medien
    Induction of N-Acetylmannosamine catabolic pathway in yeast
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 585 (1979), S. 535-542 
    Details
    ISSN: 0304-4165
    Schlagwort(e): (Yeast) ; Aminosugar metabolism ; N-Acetylmannosamine 2-epimerase synthesis
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(79)90186-7
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  • 2
    Digitale Medien
    Digitale Medien
    Inhibitory effect of glucose and adenosine 3',5'-monophosphate on the synthesis of inducible N-acetylglucosamine catabolic enzymes in yeast
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/General Subjects 632 (1980), S. 345-353 
    Details
    ISSN: 0304-4165
    Schlagwort(e): (Yeast) ; N-Acetylglucosamine catabolism ; cyclic AMP, Glucose inhibition
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0304-4165(80)90230-5
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  • 3
    Digitale Medien
    Digitale Medien
    Purification and some properties of inducible N-acetylglucosamine kinase from Candida albicans
    Amsterdam : Elsevier
    BBA - Enzymology 614 (1980), S. 350-356 
    Details
    ISSN: 0005-2744
    Schlagwort(e): (Yeast) ; Aminosugar metabolism ; Enzyme induction ; N-Acetylglucosamine kinase
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2744(80)90224-7
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  • 4
    Digitale Medien
    Digitale Medien
    Regulation of n-acetylglucosamine uptake in yeast
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Biomembranes 557 (1979), S. 248-258 
    Details
    ISSN: 0005-2736
    Schlagwort(e): (Yeast) ; Aminosugar uptake ; N-Acetylglucosamine ; Phosphorylation
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie , Medizin , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0005-2736(79)90107-X
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  • 5
    Digitale Medien
    Digitale Medien
    Heterosis without selectional coadaptation inDrosophila ananassae (1985)
    Springer
    Theoretical and applied genetics 69 (1985), S. 437-441 
    Details
    ISSN: 1432-2242
    Schlagwort(e): Inversion karyotypes ; Relative fitness ; Heterosis in interpopulation crosses ; Coadaptation ; Drosophila ananassae
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The relative viabilities of homozygous and heterozygous karyotypes were measured by making crosses between strains ofD. ananassae homozygous for ST or inverted gene orders in the second and third chromosomes. The strains utilized during the present study originated from widely separated localities in India, Kuala Lumpur and Kota Kinabaru, Malaysia and Chian Mai, Thailand. The presence of heterosis in many interpopulation crosses is evident from the results which show that the inversion heterozygotes formed by chromosomes coming from distant populations exhibit heterosis. On the other hand, heterosis is absent in two intrapopulation crosses. Thus the present results provide evidence that heterozygosis for many genes and gene complexes does produce high fitness without previous selectional coadaptation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00570914
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  • 6
    Digitale Medien
    Digitale Medien
    Population and behaviour genetics of Drosophila ananassae (1996)
    Springer
    Genetica 97 (1996), S. 321-329 
    Details
    ISSN: 1573-6857
    Schlagwort(e): Drosophila ananassae ; population and behaviour genetics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Drosophila ananassae is a cosmopolitan and domestic species. It occupies a nuique status among the Drosophila species due to certain peculiarities in its genetic behaviour. The most unusual feature of this species is spontaneous male recombination in appreciable frequency. The present review summarises the work done on population and behaviour genetics of D. ananassae from India. Population dynamics of three cosmopolitan inversions has been studied in Indian population of D. ananassae and it is evident from the results that there is a considerable degree of genetic divergence at the level of inversion polymorphism. In general, the populations from south India show more differentiation than those from the north. These three cosmopolitan inversions, which are coextensive with the species, exhibit heterosis. Interracial hybridization does not lead to beaakdown of heterosis, which suggests that evidence for coadaptation is lacking in geographic populations of D. ananassae. Heterosis appears to be simple luxuriance rather than populational heterosis (coadaptation). Unlinked inversions occur in random associations, indicating no interchromosomal interactions. However, two inversions of the third chromosome often show strong linkage disequilibrium in laboratory populations, which is due to epistatic gene interaction and suppression of crossing-over. Genetic variations for certain allozyme polymorphism and sternoleural bristle phenotypes in Indian populations of D. ananassae have also been observed. A number of investigations have also been carried out on certain aspects of behaviour genetics of Indian D. ananassae. There is evidence for sexual isolation within D. ananassae. Significant variations in mating propensity of several isofemale strains, inversion karyotypes, the diminishing effects of certain mutations on sexual activity of males and positive response to selection for high and low mating propensity provide evidence for genetic control of sexual behaviour in D. ananassae. Males contribute more to variation and thus are more subject to intra-sexual selection than females. Evidence for rare male mating advantage has also been presented. Geographic strains of D. ananassae show variation with respect to oviposition site preference. The results of studies on pupation site preference, which is an important component of larval behaviour, suggest that larval pupation behaviour in D. ananassae is under polygenic control with a substantial amount of additive genetic variation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00055318
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  • 7
    Digitale Medien
    Digitale Medien
    Selection for high and low pupation height inDrosophila ananassae (1993)
    Springer
    Behavior genetics 23 (1993), S. 239-243 
    Details
    ISSN: 1573-3297
    Schlagwort(e): Drosophila ananassae ; selection ; high and low pupation height ; polygenes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Psychologie
    Notizen: Abstract Selection for high and low pupation height inDrosophila ananassae was carried out for 10 generations. Response to selection resulted in rapid divergence in pupation height in replicates of both high and low lines. There was a significant difference in mean pupation height among high, low, and control lines. Regression coefficients for both high and low lines were significantly different from zero. The realized heritability over 10 generations was 45–49 for the high lines and 26–29 for the low lines. The F1 hybrids produced by making reciprocal crosses between high and low lines showed intermediate pupation height. These findings suggest that pupation height inD. ananassae is under polygenic control, with a substantial amount of additive genetic variation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01082461
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  • 8
    Digitale Medien
    Digitale Medien
    Selection for high and low mating propensity inDrosophila ananassae (1988)
    Springer
    Behavior genetics 18 (1988), S. 357-369 
    Details
    ISSN: 1573-3297
    Schlagwort(e): Drosophila ananassae ; selection ; high and low mating propensity ; polygenes
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Psychologie
    Notizen: Abstract InDrosophila ananassae, artificial selection was carried out for high and low mating propensity for 15 generations. Response to selection was from about F5, with rapid divergence in mating frequencies in replicates of both fast and slow lines. To assess the effect of selection on the two sexes, females and males of the selected lines were tested against their respective counterparts of the control line after 15 generations. Significant differences in mating propensity were observed when selected males were tested against the control females, which suggests that males were much more affected by selection than females. After 15 generations the fast and slow lines (both replicates) were crossedinter se and mating frequencies of F1 hybrids were studied in the same way as during the selection experiment. F1 flies had a higher mating activity compared to their parental lines when males were derived from fast lines to produce hybrids. On the other hand, F1 hybrids produced by crossing slow-line males with fast-line females showed mating frequencies similar to those of the slow parental lines. These findings suggest that mating propensity inD. ananassae is under the control of polygenes. Furthermore, the significant differences in mating propensity of hybrids produced by the fast and slow males indicate the possibility of a Y-linked influence on mating propensity inD. ananassae.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01260936
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  • 9
    Digitale Medien
    Digitale Medien
    Redox polymerization of acrylonitrile. Kinetics of the reaction initiated by the redox system tartaric acid-V5+ (1975)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 13 (1975), S. 2075-2086 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Kinetics of vinyl polymerization of acrylonitrile initiated by the redox system tartaric acid-V5+ have been investigated in aqueous sulfuric acid in the temperature range 30-40°C. The rates of polymerization and V5+ disappearance and the chain lengths of polyacrylonitrile were measured. From the results it is concluded that the polymerization reaction is initiated by an organic free radical arising from the V5+-tartaric acid reaction with termination by V5+ ions. A suitable kinetic scheme has been proposed, and the various rate and energy parameters were evaluated.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1975.170130912
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  • 10
    Digitale Medien
    Digitale Medien
    Copolymerization parameters of substituted aniline monomers (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 21 (1983), S. 1165-1171 
    Details
    ISSN: 0360-6376
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The Kelen-Tüdös linear graphical method was used to determine the copolymerization parameters of some halogen-substituted (e.g., Cl, Br, I) aniline monomers. It was found during copolymerization with p-aminobenzoic acid or p-aminophenol that the reactivity of these monomers followed the order of their basic strength. The order of their basic strength. The order of their reactivity, however, was reversed if they copolymerized with sulfanilic acid (SA). This reversal has been interpreted in terms of the resonance stabilization of monomers, the nature of the acidic functional groups present in the comonomer, and the influence of electron-accepting or electron-donating groups present in the comonomers.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1983.170210423
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