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  • 1
    Electronic Resource
    Electronic Resource
    Comparison of the hypolipidemic activity of cyclic vs. acyclic imides (1985)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 28 (1985), S. 9-12 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00379a003
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  • 2
    Electronic Resource
    Electronic Resource
    Uptake of Leucine by Larvae and Adults of Nereis (1969)
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 476-477 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The discovery of a supply of larvae, tentatively recognized as N. virens, provided the opportunity to compare uptake rates with those found in adult worms. Nothing more than a mention of the larvae of N. virens can be found in the literature57. Larvae collected from plankton samples taken in the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/221476a0
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  • 3
    Electronic Resource
    Electronic Resource
    Ultra-luminous OH maser emission from an IRAS galaxy (1989)
    [s.l.] : Nature Publishing Group
    Nature 337 (1989), S. 625-627 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The generally accepted physical mechanism for OH emission in megamasers is the amplification of a centrally located continuum source by OH molecules in galactic molecular clouds8. The OH -lines are most prominent at the main-line frequencies of 1,665 and 1,667 MHz and have velocity widths in excess ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/337625a0
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  • 4
    Electronic Resource
    Electronic Resource
    The control of food mobilization in seeds of Cucumis sativus L. (1980)
    Springer
    Planta 149 (1980), S. 288-291 
    Details
    ISSN: 1432-2048
    Keywords: Cotyledons ; Cucumis ; Germination (seeds) ; Protein (storage) ; Proteolytic activity ; Seed germination ; Storage protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An analysis of the in vitro activities of proteolytic enzymes from cotyledons of germinating cucumber seeds has been carried out and the effects of protein degradation products on such activities monitored. Aminopeptidase activity is substantially inhibited with either L-leucine or L-phenylalanine and trypsin activity with L-arginine. Aminopeptidase activity was also markedly reduced in the presence of individual di- and tripeptides. Of the peptides tested, however, only L-tryptophyl-L-phenylalanine inhibited the degradation of native cucumber seed protein by the endogenous cucumber seed protease(s) (autodigestive activity).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384568
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  • 5
    Electronic Resource
    Electronic Resource
    Expression of α-amylase and other gibberellin-regulated genes in aleurone tissue of developing wheat grains (1986)
    Springer
    Planta 169 (1986), S. 420-428 
    Details
    ISSN: 1432-2048
    Keywords: Aleurone ; α-Amylase ; Complementary DNA ; Gibberellin and gene expression ; Seed development ; Triticum (gibberellin)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Aleurone tissue from freshly harvested immature wheat grains (Triticum aestivum L. cv. Sappo) which is normally unresponsive to gibberellic acid can be made responsive by subjecting the tissue to a pre-incubation treatment in a simple buffered medium prior to the addition of the growth substance. The effectiveness of this treatment is dependent on grain age, with grains less than 15–20 days post anthesis failing to become converted to a responsive state whilst tissue from grains older than this become increasingly susceptible. Tissue from grains of a certain age (approx. 25–28 days post anthesis) produce small amounts of α-amylase following this treatment even in the absence of exogenously applied growth substance. Using different 32-labelled complementary-DNA probes for α-amylase in wheat it was demonstrated that the failure of freshly harvested tissue to produce α-amylase was correlated with the absence of the appropriate mRNA species. Inability to accumulate α-amylase mRNA in response to gibberellic acid was removed by the pre-iccubation treatment and also by enforced drying. The gibberellin-regulated expression of other unidentified genes also responds to pre-incubation or drying. Induction of gibberellin-responsiveness in immature aleurone cells did not extend to the secretion of acid phosphatase, protease and ribonuclease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392140
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  • 6
    Electronic Resource
    Electronic Resource
    Calcium-dependent induction of novel proteins by abscisic acid in wheat aleurone tissue of different developmental stages (1989)
    Springer
    Planta 179 (1989), S. 156-164 
    Details
    ISSN: 1432-2048
    Keywords: Abscisic acid and protein synthesis ; Aleurone ; Calcium and protein synthesis ; Protein synthesis ; Protein phosphorylation ; Seed development ; Triticum (ABA, Ca2+, protein synthesis)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Aleurone tissue of mature wheat (Triticum aestivum L. cv. Sappo) grains make novel polypeptides in response to abscisic acid (ABA), but only in the presence of Ca2+. Effects of ABA plus Ca2+ include up- and down-modulation of other polypeptides. The ABA-induced polypeptides appear not to be the 21-kilodalton (kDa) amylase inhibitor which has been reported to be ABA-inducible in barley. Aleurone tissue from developing grains of different ages failed to respond to ABA plus Ca2+ in any way. Endogenous ABA levels were determined by monoclonal radioimmunoassay in developing, mature, and “sensitised” developing tissues. The ABA level rose to a maximum at 35 days post anthesis but was not detectable in mature cells. Developing layers sensitised to gibberellic acid (GA) showed decreased levels of ABA, similar to those in mature tissue, concurrent with acquired responsiveness to GA in respect of its induction of α-amylase. However, these sensitised cells still remained non-responsive to added ABA in terms of modulation of polypeptide pattern, though they did respond to ABA in the blocking of GA-induced α-amylase production. The role of protein phosphorylation in signal transduction was examined. The implications of these findings are discussed with reference to the role of ABA in developing and mature aleurone cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00393685
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  • 7
    Electronic Resource
    Electronic Resource
    The control of food mobilisation in seeds of Cucumis sativus L. (1981)
    Springer
    Planta 152 (1981), S. 70-73 
    Details
    ISSN: 1432-2048
    Keywords: Cotyledons ; Cucumis ; Lipase ; Lipid degradation ; Phytochrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The degradation of neutral lipid and the development of lipase activity in cucumber cotyledons is stimulated by white light. Malate synthase and isocitrate lyase activities show no stimulation. Lipase activity and neutral lipid breakdown are also enhanced by red light, far-red light proving ineffective. Far-red light reverses the effect of red light indicating the involvement of phytochrome in the control of lipase activity. Although light stimulates neutral lipid degradation it appears that much of the additional lipid lost is used in the synthesis of polar lipid constituents. Furthermore, the influence of light on lipid degradation appears to be species dependent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384987
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  • 8
    Electronic Resource
    Electronic Resource
    The control of food mobilisation in seeds of Cucumis sativus L. (1979)
    Springer
    Planta 146 (1979), S. 579-584 
    Details
    ISSN: 1432-2048
    Keywords: Cotyledons Cucumis ; Lipid mobilisation ; Protein mobilisation ; Seeds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The development of maximal rates of lipid and protein hydrolysis in cucumber cotyledons depends upon the removal of the testa and the presence of the embryonic axis. The testa appears to exert at least part of its inhibitory influence by suppressing the development of enzyme activity associated with lipolysis and proteolysis. There is, however, no evidence to suggest that the presence of the embryonic axis is a pre-requisite for the development of optimal enzyme activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388835
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  • 9
    Electronic Resource
    Electronic Resource
    The control of food mobilisation in seeds of Cucumis sativus L. (1979)
    Springer
    Planta 146 (1979), S. 585-590 
    Details
    ISSN: 1432-2048
    Keywords: Cucumis ; Seeds (food mobilisation)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Removal of the embryonic axis from germinated cucumber seeds, either on the second of fourth day after imbibition, subsequently results in reduced rates of lipid and protein degradation and in the accumulation of free sugars and amino acids in the cotyledons. These isolated cotyledons show an inherent capacity for expansion growth which apparently results from an increased rate of water uptake. When water uptake is inhibited by incubating samples in polyethylene glycol the rate of lipid degradation is further reduced. This is accompanied by an additional increase in the reducing sugar and sucrose content of the cotyledons. Protein degradation in isolated cotyledons is inhibited to the same extent whether samples are incubated in water or polyethylene glycol. Furthermore, amino acid levels show appreciable and almost identical increases in both incubation media. Evidently an inverse correlation exists between rates of reserve mobilisation and levels of end products. It is suggested that the axis controls food mobilisation through a sink effect by reducing the levels of end products in the cotyledons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388836
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  • 10
    Electronic Resource
    Electronic Resource
    Non-coordinate synthesis and methylation of tRNA following excision of plant tissue (1973)
    Springer
    Planta 114 (1973), S. 227-238 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The relationship between the synthesis and methylation of nucleic acids in tissue slices from higher plant storage organs has been investigated. Although the observed nucleic acid synthesis is mainly an expression of rRNA synthesis the highest level of methylation occurs in tRNA. Unlike the synthesis and methylation of rRNA which appears completely coupled, the methylation of tRNA is not tightly coupled to its synthesis. It is suggested that a pool of undermethylated tRNA exists in the tissue prior to incubation and that methylation of this tRNA initially controls the rate of protein synthesis in the tissue slices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00389038
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