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  • 1995-1999  (5)
  • 1980-1984  (11)
  • 1960-1964  (4)
  • 1
    Digitale Medien
    Digitale Medien
    Automerization of C11H11 chlorides and stability of their cations (1981)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 103 (1981), S. 6530-6532 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja00411a059
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  • 2
    Digitale Medien
    Digitale Medien
    Spectrophotometric Determination of Azide with Ferric Perchlorate (1960)
    s.l. : American Chemical Society
    Analytical chemistry 32 (1960), S. 1209-1210 
    Details
    ISSN: 1520-6882
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ac60165a055
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  • 3
    Digitale Medien
    Digitale Medien
    Additions and Corrections - The Automerization of C11H11 Chlorides and the Stability of Their Cations (1982)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 104 (1982), S. 2677-2677 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja00373a602
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  • 4
    Digitale Medien
    Digitale Medien
    The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 18 (1981), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Early sexual maturity occurred in the majority of male Atlantic salmon parr. Levels of the plasma androgens testosterone and 11-ketotestosterone rose steadily as the male parr matured, and decreased as the testes regressed. No such progressive changes were observed in the plasma gonadotrophin (GTH) levels, although the pituitary GTH levels were much higher in mature than in immature male parr; reasons for this, incluiding the possibility that the GTH radioimmunoassay employed is inadequate, are discussed. All female parr remained immature throughout the year, although the gonadosomatic index did show an annual cycle. Adult salmon had higher GTH and sex steroid levels than parr at the same stage of sexual maturity, the levels corresponding to the degree of sexual development of the adult fish.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1981.tb03760.x
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  • 5
    Digitale Medien
    Digitale Medien
    Effects of ovariectomy of the dogfish Scyliorhinus canicula L. on circulating levels of androgen and oestradiol and on pituitary gonadotrophin content (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 21 (1982), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Levels of androgens and oestradiol in dogfish, Scyliorhinus canicula, plasma, measured by radioimmunoassay, decrease markedly after ovariectomy (OVX). The magnitude and latency of these responses varies according to length of captivity preceding the operation and the time of year at which ovariectomy is performed. Androgens are cleared more rapidly than oestradiol from plasma following OVX, and levels of both steroids are reduced after laparotomy (LAP) in November but not in March. An extract of ventral lobes of the dogfish pituitary induces a significant increase in the circulating androgen levels in LAP fish but not in OVX fish, indicating that the ovary is the major site of androgen production in response to stimulation by dogfish gonadotrophin. Intramuscular injections of oestradiol benzoate (2.5 mg per fish) into LAP fish produce a significant reduction in the gonadotrophin content of the pituitary ventral lobe, measured in the quail testicular cell bioassay, when compared to LAP and unoperated controls. However, no significant changes in the gonadotrophin content of the ventral lobe were seen five days after OVX in June.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1982.tb02834.x
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  • 6
    Digitale Medien
    Digitale Medien
    Field evaluation of a predictive model to control anthracnose disease of mango in the Philippines (1996)
    Oxford, U.K. and Cambridge, USA : Blackwell Science Ltd
    Plant pathology 45 (1996), S. 0 
    Details
    ISSN: 1365-3059
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Infection estimates determined by a predictive model developed by Dodd et al. (1991b) were used to time fungicide sprays to control anthracnose disease of mango in the Philippines. For an amount of disease on fruits after harvest which was acceptable to growers, this approach resulted in the application of five fewer sprays compared with a standard spray programme used by the growers in a field trial conducted in 1991–1992. The model predicted only two high anthracnose-risk periods (〉40% of conidia forming appressoria) throughout the duration of the growing period. Rainfall intensity and its time of occurrence during fruit development was found to greatly influence the amount of anthracnose and stem-end rot disease on fruits after harvest. Three relatively strong precipitations (〉20 mm) within a month before harvest resulted in relatively high anthracnose infection of fruits after harvest. At a second field trial, rainfall periods during fruit development did not exceed 4 mm and resulted in virtually disease-free fruits after harvest, including those not treated with fungicide. Again the use of the predictive model resulted in the elimination of five fungicide treatments compared with the standard programme. The amount of rainfall and the time of its occurrence should be considered when planning a disease management scheme for the control of anthracnose on mango fruit.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1046/j.1365-3059.1996.d01-110.x
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  • 7
    Digitale Medien
    Digitale Medien
    Thyroid Gland and Temperature Tolerance Relationships in Cold-blooded Vertebrates (1963)
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 299-299 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] As a preliminary to further work on these aspects of thyroid physiology, and in an attempt to confirm and extend the work of Fortune, one of us (J. M. D.) set out to repeat the work on minnows already described. Fish were obtained from Lake Windermere in September and October and a series of ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/199299a0
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  • 8
    Digitale Medien
    Digitale Medien
    A Neurohypophyseal Principle in the Elasmobranch Pituitary (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 850-851 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Pituitary glands were removed from freshly killed Squalus acanthias, Scyliorhinus caniculus, Raia clavata, R. batis and R. naevus, separated into their constituent lobes, and dried in acetone. The resulting powders were extracted with 0-25 per cent acetic acid by the standard method for ox ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/185850a0
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  • 9
    Digitale Medien
    Digitale Medien
    The BEG Expert System – a multimedia identification system for arbuscular mycorrhizal fungi (1996)
    Springer
    Mycorrhiza 6 (1996), S. 275-278 
    Details
    ISSN: 1432-1890
    Schlagwort(e): Key words Arbuscular mycorrhiza ; Glomales ; BEG ; Expert System ; CD-ROM
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  Knowledge of the biodiversity of arbuscular mycorrhizal fungi is limited and keys for their identification are not in a user-friendly format for the non-expert. An Expert System, linked to the BEG (La Banque Européenne des Glomales), has been developed on a CD-ROM to produce a multimedia identification system for these fungi.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s005720050137
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  • 10
    Digitale Medien
    Digitale Medien
    A comparison of the development and metabolic activity of mycorrhizas formed by arbuscular mycorrhizal fungi from different genera on two tropical forage legumes (1998)
    Springer
    Mycorrhiza 8 (1998), S. 149-157 
    Details
    ISSN: 1432-1890
    Schlagwort(e): Key words Alkaline phosphatase ; Mycelium ; Acaulospora ; Gigaspora ; Glomus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract  Two glasshouse experiments were done to assess the development and metabolic activity of mycorrhizas formed by isolates of arbuscular mycorrhizal fungi (AMF) from three different genera, Acaulospora, Gigaspora and Glomus on either Pueraria phaseoloides L. or Desmodium ovalifolium L. plants. The second of the two experiments included three levels of a localised phosphate source in the pots. Alkaline phosphatase (ALP), stained histochemically in the intra-radical mycelium (IRM) of AMF over sequential harvests, did not provide a direct marker for the efficiency of AMF in mobilising phosphorus (P) for plant growth and development. The ability of the extra-radical mycelium (ERM) to scavenge a localised phosphate source, determined by its extraction from buried 35-μm mesh pouches, was dependent on the species of AMF tested. This work indicates that AMF from different genera have unique patterns of mycelial development when forming mycorrhizas with tropical hosts in the presence of a localised phosphate source. AMF also appear to have different mechanisms for the control of P transfer, within the mycelium, to the host. The significance of the architecture of the ERM is discussed as well as the localisation of ALP in the IRM in determining the efficiency of AMF in terms of P accumulation in planta and subsequent growth of plants.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s005720050228
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