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  • 1
    Electronic Resource
    Electronic Resource
    Grazing of phytoplankton by copepods in eastern Antarctic coastal waters (1997)
    Springer
    Marine biology 128 (1997), S. 39-48 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chlorophyll a, primary productivity and grazing by copepods on phytoplankton were measured in the upper water column during the summer of 1994/1995 at a coastal site near Davis Station, East Antarctica. Chlorophyll a was at a maximum in mid-December, then dropped markedly as the coastal fast ice melted and broke‐out. Phytoplankton biomass increased again from mid‐ to late‐February. Copepods accounted for at least 65% of zooplankton biomass in the water column before sea ice break‐out, whereas larval polychaetes and ctenophores dominated after ice break‐out. Oncaeacurvata was the numerically dominant species throughout the study. The highest grazing rate (8.7 mg C␣m−3␣d−1) was recorded on 21 December when O.␣curvata accounted for 64% of the total. Grazing had decreased markedly by 28 December (0.9 mg C m−3 d−1); again O. curvata accounted for over 50% of the total ingested. Copepod grazing increased after ice break-out until the last experiment on 20 February (⋍5 mg C␣m−3␣d−1). The main species responsible for grazing during this period were O. curvata, Oithonasimilis, Calanoidesacutus and unidentified copepod nauplii. It was estimated that copepods removed between 1 and 5% of primary productivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002270050066
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  • 2
    Electronic Resource
    Electronic Resource
    A taxonomic and ecological study of candidosis (1985)
    Springer
    Microbial ecology 11 (1985), S. 71-79 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A total of 450 yeast isolates were obtained from up to 34 sites on 59 human subjects. The yeasts were characterized using morphological features and assimilation tests. Ten species were identified but, of these,Candida albicans andCandida parapsilosis were the most common and accounted for 84% of the isolates. An examination of the biotypes of the various species indicated a much greater diversity in the yeast microflora than that detected by species identifications alone. Fifty-five biotypes were differentiated and it is suggested that these could be regarded as distinct taxonomic or ecological entities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02015110
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  • 3
    Electronic Resource
    Electronic Resource
    Thyroid Dysfunction in Aborted and New-born Calves (1962)
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 595-596 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Chiefly because of post-mortem degeneration changes occurring before the calf reached the laboratory, only 33 glands were entirely suitable for histo-logical examination. From the histological findings, these glands were separated into normal (11), doubtful (4), abnormal (18). In the normal ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/193595b0
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  • 4
    Electronic Resource
    Electronic Resource
    Multiple Transverse Breakage of the Filamentous Particles of Turnip Mosaic Virus by Ultrasonic Vibration (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 495-497 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] ATTEMPTS have been made by some workers to use £\. the Ouchterlony agar diffusion precipitin test1 for serological work on rod and filamentous-shaped viruses. When the length of the virus was comparatively short, as in the case of tobacco mosaic2 (300 m) and barley stripe mosaic virus3 (126 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207495a0
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  • 5
    Electronic Resource
    Electronic Resource
    The Physiology of Encystment of Hartmannella castellanii (1969)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 16 (1969), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Some aspects of the physiology of encystment of the soil amoeba Hartmannella castellanii in a replacement encystment medium consisting of 5 × 10-2 M MgCl2 have been investigated. It is suggested that measurement of the cellulose produced during encystment in the synthesis of the cyst wall is a more reliable measure of the process than other methods tried.The degree of encystment was dependent on the physiologic state of the amoebae and the composition of the growth medium, but the initial pH of the encystment medium (C. 4.0-8.5) had little effect on the process. The requirement for Mg during encystment was probably not due to its deficiency during growth. Encystment was inhibited to varying extents by inhibitors of protein synthesis, tetracycline and chloramphenicol and also by arsenate, arsenite and iodoacetate; sodium fluoride, malonate and 2, 4-dinitrophenol were without marked effect.Addition of glucose and α-ketoglutarate to the replacement medium led to improvement in the encystment response. The presence of glutamate and histidine during encystment led to cell death. Other carbon and nitrogen sources had no effect.During encystment there was an increase in the metabolic activity of the amoebae, as measured by their oxygen consumption. This was accompanied by a decrease of about 40% in cellular dry weight and protein content. Of the other chemical components, there were marked initial increases in the levels of total carbohydrates and pentose which were followed by their depletion during cellulose synthesis.Encystment was completed after about 64 hr when the synthesis of cellulose was complete and the oxygen uptake of the amoebae fell to an immeasurable level.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1969.tb02238.x
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  • 6
    Electronic Resource
    Electronic Resource
    Starvation and Encystment of a Soil Amoeba Hartmannella castellanii (1968)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 15 (1968), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The behavior of the amoeba H. castellanii was investigated in various carbon and nitrogen deficient media with a view to developing a satisfactory replacement medium for the study of encystment and excystment. Media which had been devised for other soil amoebae did not cause H. castellanii to encyst. In these media there was an efflux of material from the cells which was independent of osmolarity but which was minimized by the addition of magnesium. Maximal encystment occurred in a medium containing magnesium chloride alone.The cysts produced in the magnesium chloride replacement medium are viable and readily excyst when resuspended in the growth medium. The cysts contain cellulose, which is not present in the vegetative amoebae, and differ from the amoebae in their greater resistance to induced lysis and mechanical injury.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1968.tb02192.x
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  • 7
    Electronic Resource
    Electronic Resource
    Hughes's Microphone (1878)
    [s.l.] : Nature Publishing Group
    Nature 18 (1878), S. 277-278 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] MR. EDISON finds a resemblance between his carbon telephone and my microphone. I can find none whatever; the microphone in its numerous forms that I have already made, and varied by many others since, is simply the embodiment of a discovery I have made, in which I consider the microphone ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/018277b0
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  • 8
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    Unknown
    Biological Aspects of Recycling (1975)
    London : Periodicals Archive Online (PAO)
    RSA Journal. 123:5223 (1975:Feb.) 114 
    Details
    ISSN: 0958-0433
    Topics: Art History
    Description / Table of Contents: Three Cantor Lectures on THE USEFUL CONVERSION OF WASTE
    Notes: PROCEEDINGS OF THE SOCIETY
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:q549-1975-123-23-000010
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  • 9
    Electronic Resource
    Electronic Resource
    The Production of Cephalosporin C by Acremonium chrysogenum is Improved by the Intracellular Expression of a Bacterial Hemoglobin (1993)
    [s.l.] : Nature Publishing Company
    Nature biotechnology 11 (1993), S. 926-929 
    Details
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] A DNA vector for expressing an oxygen-binding heme protein (Vitreoscilla hemoglobin, or VHb) in filamentous fungi was constructed and introduced into a cephalosporin C-producing strain of Acremonium chrysogenum. Expression of VHb in transformants was demonstrated by Western immunoblot analysis and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nbt0893-926
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  • 10
    Electronic Resource
    Electronic Resource
    Lay guide to mircobiology (1976)
    [s.l.] : Nature Publishing Group
    Nature 262 (1976), S. 824-824 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IT was difficult for me, now approaching the end of a career in microbiology, to judge a book intended for lay-people. Too often nit picking intervened. The opinion which follows is partly my own and partly that of friends and relations, all lay-people (except for an acquaintance with me). The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/262824a0
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