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  • 11
    Electronic Resource
    Electronic Resource
    Sempervirenic acid, a diterpene acid from Solidago sempervirens
    Amsterdam : Elsevier
    Phytochemistry 22 (1983), S. 1042-1043 
    Details
    ISSN: 0031-9422
    Keywords: Compositae ; Solidago sempervirens ; diterpene acid ; sempervirenic acid 3β-acetoxy-labda-7,13-diene-15-oic acid
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0031-9422(83)85058-4
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  • 12
    Electronic Resource
    Electronic Resource
    Critical Evidence for Somatic Doubling of Chromosomes in a Top Yeast (1952)
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 932-932 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Spontaneous tetraploidy has been observed periodically4 in our control strain, BY 1. It was absent in the top yeast5, BY 2. Recently, rare pictures of somatic doubling of chromosomes were observed in smears of the top yeast, BY 2, stained by the Feulgen technique6 (Fig. 1). Proof of somatic ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/169932a0
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  • 13
    Electronic Resource
    Electronic Resource
    Degradation of pyrene by indigenous fungi from a former gasworks site (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 210 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Indigenous fungi isolated from soil of a former gasworks site were investigated in submerged cultures with pyrene as the sole carbon source. Five fungal strains capable of degrading pyrene included one strain of Trichoderma harzianum and four strains with characteristics of the genus Penicillium. These are identified as Penicillium simplicissimum, Penicillium janthinellum, Penicillium funiculosum and Penicillium terrestre. A maximum of 75% of 50 mg l−1 and 67% of 100 mg l−1 of pyrene was removed by the fast degrading strain P. terrestre at 22°C during 28 days of incubation. The slower degrader P. janthinellum was able to remove 57% of 50 mg l−1 and about 31.5% of 100 mg l−1 pyrene. Degradation of pyrene is directly correlated with biomass development. To the best of our knowledge, this is the first time that fungi have been reported to use pyrene as the sole carbon and energy source. They may be ideal candidates for effective bioremediation of polycyclic aromatic hydrocarbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11185.x
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  • 14
    Electronic Resource
    Electronic Resource
    Mutation of Clostridium thermocellum in the presence of certain carbon sources (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 71 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract When a cellobiose-grown inoculum of Clostridium thermocellum was transferred to either glucose or fructose as the sole carbon sourcem growth occurred only after a long lag of 180–200 h. We established that sugar uptake and phosphorylation were not limiting growth nor was the lag period the time take for a physiological adaptation process or for the growth of a mutant carried over in the cellibiose-grown incoculum. It became apparent that a mutation was occuring during the lag period in response to the selection pressure exerted by the presence of glucose or fructose as the sole carbon source. Once growth occurred on glucose and fructose, the cells could be transferred to cellobiose and back to glucose or fructose without exhibiting the long lag period. The change was stable over several transfers in the respective sugars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb03822.x
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  • 15
    Electronic Resource
    Electronic Resource
    BIOENERGETICS OF AFLATOXIN BIOSYNTHESIS IN Aspergillus parasiticus (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 45 (1980), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Variations in levels of adenine nucleotides during growth of A. parusiticus were studied under asparagine and zinc deficiency and correlated with aflatoxin biosynthesis. ATP levels decreased gradually from exponential to stationary phase but the reverse was true for ADP and AMP. However, AMP levels in stationary phase were virtually constant under all growth conditions employed. Increased AMP levels were observed in fungal mycelium on high aflatoxin-producing medium as compared to the deficient media. The onset of aflatoxin biosynthesis however was accompanied by a lowering of energy charge and ATP levels.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1980.tb07505.x
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  • 16
    Electronic Resource
    Electronic Resource
    Studies on the cytology of yeasts (1953)
    Springer
    Archives of microbiology 19 (1953), S. 267-286 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Unorthodox methods of approach appear to be responsible for the radical divergences in views regarding the identification of the various organelles in a budding yeast cell. 2. The problems of yeast cytology are analysed, and the necessity to distinguish the cytological behaviour of an aerobically growing culture from an anaerobic one is emphasized. 3. Photomicrographic proof for mitosis is offered in a purely aerobic strain of yeast having a pair of unequal chromosomes. 4. The chromatin mass seen at early prophase resolves itself into the pair of unequal metaphase chromosomes. These reproduce and the mother cell and bud regularly receive an unequal pair. 5. Evidence for somatic pairing and synapsis is presented. The reconstitution of the nucleus in the telophase takes place by an exact reversal of the stages leading to the metaphase thus proving chromosome continuity. 6. The cytological behaviour of the rare spontaneous autotetraploids arising in normal diploid cultures is illustrated and their significance in genetic investigations discussed. 7. A pictographic summary of the mitotic cycle is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00410130
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  • 17
    Electronic Resource
    Electronic Resource
    Histopathological evaluation of polymethyl methacrylate as an embolic agent (1992)
    Springer
    Acta neurochirurgica 117 (1992), S. 30-33 
    Details
    ISSN: 0942-0940
    Keywords: Polymethyl methacrylate ; embolic agent ; histotoxicity ; cyanoacrylates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Polymethyl methacrylate (PMMA) microspheres were used as an embolic agent to reduce the vascularity in eight patients with intracranial vascular tumours. Post embolization angiograms showed 30–60% reduction in the vascularity of the tumours. No patient developed any neurological complications in the immediate post-embolization period. These eight patients subsequently underwent surgery for the removal of their tumours. During surgery there was minimal blood loss and a good plane of cleavage was obtained between the tumour and the adjacent brain. The surgical specimens were examined histopathologically for the effects of PMMA. PMMA microspheres, in contrast to other cyano-acrylates — Isobutyl-2-cyano-acrylate (IBCA) — did not elicit either inflammatory reaction or mural angionecrosis within the wall of the embolised vessels. The histopathological studies suggest that PMMA microspheres are an inert material and can be used as an adjunct in the management of intracranial vascular tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01400631
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  • 18
    Electronic Resource
    Electronic Resource
    An attempt to induce crossing-over in males ofDrosophila melanogaster with ovarian extract (1970)
    Springer
    Cellular and molecular life sciences 26 (1970), S. 799-799 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Von zwei früheren, sich widersprechenden Befunden wird einer gestützt: Ovarialextrakte vonDrosophila lösen in Männchen keine «crossing-over» aus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02232559
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  • 19
    Electronic Resource
    Electronic Resource
    Occurrence and activity of phosphate-solubilizing fungi from coconut plantation soils (1985)
    Springer
    Plant and soil 87 (1985), S. 357-364 
    Details
    ISSN: 1573-5036
    Keywords: Coconut soils ; Competitive saprophytic ability ; Phosphate-solubilizing fungi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The occurrence of phosphate-solubilizing fungi in coconut plantation soil types was investigated. The laterite, alluvial and clayey soils harboured more of the P-solubilizing fungi than the sandy soils. The isolated P-solubilizing fungi solubilized 26 to 74 per cent of the tricalcium phosphate in 5 to 15 days. The competitive saprophytic ability of the active P-solubilizing fungi in soil varied between the isolates. Eight fungi with high P-solubilizing capacity and high competitive saprophytic ability were recognised. They have better capacity to survive in soil and express their role in P-solubilization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181903
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  • 20
    Electronic Resource
    Electronic Resource
    A rapid method for recovery of radiochemically pure99mTc from MEK extracts (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 146 (1990), S. 235-244 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A method based on the sorption of99mTc in MEK on an acid alumina column has been investigated. A number of parameters as column dimension, amount of alumina, MEK volumes, etc. is found to affect the extent of adsorption and the final purity of99mTc solution. These parameters have been standardized and a method for rapid recovery of MEK-extracted99mTc has been developed. The final characteristics of the99mTc is found to conform to pharmacopoeia specification.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164191
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