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  • 1
    Electronic Resource
    Electronic Resource
    Indian symposium (1984)
    [s.l.] : Nature Publishing Group
    Nature 309 (1984), S. 108-108 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR ? We have read the news item in Nature (1 March p.6) regarding the inability of Israeli scientists to attend the VIIth International Biotechnology Symposium. To put the record straight, the organizers did everything possible to help the scientists from Israel to attend the symposium. In fact, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/309108b0
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  • 2
    Electronic Resource
    Electronic Resource
    Stimulation of Bacterial Sulphate-Reduction by (+)-Biotin (1954)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 7 (1954), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1954.tb07732.x
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  • 3
    Electronic Resource
    Electronic Resource
    Inhibition of Bacterial Sulphate-Reduction in Presence of Short Chain Fatty Acids (1955)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 8 (1955), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1955.tb08965.x
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on the symbiosis of mixed culture ofAzotobacter and yeast (1975)
    Springer
    Applied microbiology and biotechnology 1 (1975), S. 95-119 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Azotobacter culture has been investigated in the physiological state in which it fixed molecular nitrogen. A chemically defined medium was formulated that would support the growth ofAzotobacter vinelandii, but not the growth ofSaccharomyces cerevisiae in pure culture, unless a nitrogen source was added. The yeast culture was allowed to grow in mixed culture with the bacterium. Transient and steady-state populations of each organism in mixed culture at various dilution rates were enumerated with hemocytometer under a microscope. The difference in size of the organisms permitted easy resolution. The essential nutrilite, nitrogen, which is fixed by the bacteria and required by yeast caused the yeast to be dependent on the growth of the bacterium. At low dilution rates the yeast population reflected changes in the numbers ofAzotobacter. The numbers ofAzotobacter were identical in pure culture or in mixed culture; thus the interaction can be termed competitive commensalism. In batch culture, yeast had no effect on the rate of nitrogen fixation byAzotobacter. E. Coli ML-30 had a slight inhibitory effect whileC1. pasteurianum exhibited a stimulating effect. In continuous culture at low dilution rates, yeast was found to increase the rate of nitrogen fixation byAzotobacter vinelandii by 4.5%. Differential equations characterizing commensalism in the chemostat have been proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00942208
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  • 5
    Electronic Resource
    Electronic Resource
    Response from New Delhi (1985)
    [s.l.] : Nature Publishing Company
    Nature biotechnology 3 (1985), S. 591-591 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] To the editor: This is a response to the letter from MIT's Arnold Demain (Sept. 1984) concerning inability on the part of some bioscientists from Israel to participate in the VIIth International Biotechnology Symposium held in New Delhi in February 1984. A key point seems to be missing from Dr. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0785-591e
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  • 6
    Electronic Resource
    Electronic Resource
    An analysis of the relative activities of a number of promoter constructs from genes which are expressed during late pollen development as determined by particle bombardment (1995)
    Springer
    Plant cell reports 15 (1995), S. 154-158 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The promoters of a tobacco actin gene, a tobacco pectate lyase, a tobacco and maize polygalacturonase and aBrassica S-locus related gene have been fused to theβ-glucuronidase reporter gene and their activities determined by biolistic transient assay in tobacco pollen. In stably transformed tobacco all the transgenes with the exception of Cauliflower Mosaic Virus-35S-β-glucuronidase appear to express efficiently in maturing pollen. Transient assay analysis showed that the tobacco pectate lyase and the polygalacturonase constructs were 8x more active than the tobacco actin construct, and that the tobacco polygalacturonase construct was some 33x more active than the maize polygalacturonase construct. Constructional manipulations that altered the lengths of the 5′-untranslated leaders including one which resulted in the removal of a 490 bp leader intron had little effect on the observed level of expression. However, the alteration of the context of the ATG from A/TnnATGG to CnnATGT resulting in a 70% reduction in the observed levels of activity, was obtained with the pectate lyase and polygalacturonase promoters. An identical reductional was also observed in transgenic plant populations transformed with the polygalacturonase transgenes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01690275
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  • 7
    Electronic Resource
    Electronic Resource
    Analysis of the gibberellin-responsive promoter of a cathepsin B-like gene from wheat (1992)
    Springer
    Plant molecular biology 20 (1992), S. 849-856 
    Details
    ISSN: 1573-5028
    Keywords: GA regulation ; thiol-protease promoter ; wheat ; aleurone ; particle gun
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A wheat gene (A121) encoding a protein with sequence similarity to mammalian cathepsin B is regulated by gibberellic acid (GA) in aleurone layers of germinating grains. To analyse the mechanism of A121 regulation, its promoter was fused to the β-glucuronidase reporter gene (GUS) and introduced by micro-projectile bombardment into aleurone layers of oat. With 2.3 kb of promoter sequence, the GUS expression was enhanced by GA treatment. This effect was reversed by abscisic acid (ABA). This result showed for A121, like the α-amylase genes, that the regulation by GA and ABA was at the level of transcription. The GA responsiveness of the promoter was retained with as little as 276 bp of promoter sequence. Sequence comparison with a GA responsive promoter of an α-amylase gene identified the conserved element GCAACGGCAACGATGG which is required intact for full expression of both promoters. However, there was no identifiable similarity in the cathepsin-like promoter with the GA-responsive element of α-amylase promoters with the consensus sequence TAACAAA, suggesting that GA affects more than one mechanism of transcriptional control.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00027156
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  • 8
    Electronic Resource
    Electronic Resource
    Selection of plant heterokaryons from diverse origins by flow cytometry (1990)
    Springer
    Protoplasma 154 (1990), S. 34-44 
    Details
    ISSN: 1615-6102
    Keywords: Electrofusion ; Flow cytometry ; Heterokaryon selection ; Plant protoplasts ; Somatic hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Protoplasts from a range of tissue sources for 21 species within the plant familiesCompositae, Cruciferae, Leguminosae, andSolanaceae were fused electrically to produce heterokaryons. Protoplasts were labelled by application of green fluorescein fluorescence to one parental protoplast population, and the red fluorescence of either naturally occurring chlorophyll or of rhodamine exogenously applied to the other parental type. Heterokaryon populations were identified, characterized and isolated using an EPICS 541 flow cytometer. Following culture, sorted heterokaryons from 11 of the 14 combinations investigated underwent division; in 5 of these combinations the heterokaryons developed into cell colonies, 4 produced callus and 2 gave rise to somatic hybrid shoots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01349533
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  • 9
    Electronic Resource
    Electronic Resource
    Fibril formation from cellulose by a novel protein from Trichoderma reesei: A non-hydrolytic cellulolytic component? (1998)
    Springer
    World journal of microbiology and biotechnology 14 (1998), S. 551-558 
    Details
    ISSN: 1573-0972
    Keywords: Cellulose degradation ; Trichoderma reesei cellulase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract A low molecular weight protein, named fibril-forming protein (FFP), was isolated from the culture supernatant of Avicel-grown Trichoderma reesei. The protein was purified to homogeneity and it exhibited a molecular weight of 11,400Da. Low amounts of this protein caused apparently non-hydrolytic disruption of filter paper, releasing fibrils without any detectable release of reducing sugars. It displayed no hydrolytic activity on carboxymethylcellulose (CMC), p-nitrophenyl-β-d-glucoside (pNPG) or 4-methylumbelliferyl cellobioside. The pH optimum of the protein was between 4 and 5. The temperature optimum was 40°C and the computed activation energy (Ea) for the filter paper disruption process was 4.18kcal/mol, suggesting disruption of non-covalent bonds. It had no immunological cross reactivity with reported cellulase components of T. reesei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008888331936
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  • 10
    Electronic Resource
    Electronic Resource
    Studies on immobilized Saccharomyces cerevisiae. II. Effect of temperature distribution on continuous rapid ethanol formation in molasses fermentation (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 797-804 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Recently, considerable interest has been shown in the study and analysis of immobilized cell reactors. One of the major uses of such a reactor system is expected to be in ethanol production from carbohydrates. One distinct disadvantage of this system is carbon dioxide gas holdup associated with unsteady-state temperature distribution across the reactor. Taking into account the earlier published data and assuming steady-state-substrate balance, and unsteady-state energy balance, and an average gas holdup of 20% with the heat retained by the gas neglected, the average reaction rate in the differential element was computed. Finally, a mathematical model to predict steady-state temperature profile along the reactor was developed. It was verified with experimental data obtained from an immobilized yeast reactor column (1 m × 14.5 cm). The experimental data fit well those computed from the model within an accuracy of 5%.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240404
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