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  • 1
    Electronic Resource
    Electronic Resource
    Agricultural Research in Eastern and Southern Africa (1970)
    Cambridge : Cambridge University Press
    The @journal of modern African studies 8 (1970), S. 288-293 
    Details
    ISSN: 0022-278X
    Source: Cambridge Journals Digital Archives
    Topics: Ethnic Sciences , History , Political Science , Economics
    Notes: Before commenting on the situation in separate countries, it is useful to look briefly at the over-all state of natural resources science in Africa. This was reviewed in detail six years ago at a U.N.E.S.C.O. conference in Lagos and there has been no major change in the picture of fragmentation of effort, with as yet no effective machinery for co-operation. Some rather slow pro. gress was made by the C.C.T.A. among the countries south of the Sahara towards the co-ordination and sharing of scarce scientific resources, but this initiative has not yet been effectively regained by its successor organisation, the Scientific and Technical Research Committee of the Organisation of African Unity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0022278X00019698
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  • 2
    Electronic Resource
    Electronic Resource
    A mass spectrometry study of thermal dissociation of cork
    Amsterdam : Elsevier
    International Journal of Mass Spectrometry and Ion Processes 112 (1992), S. 191-204 
    Details
    ISSN: 0168-1176
    Keywords: cork ; electron-induced fragmentation ; thermal dissociation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-1176(92)80004-K
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  • 3
    Electronic Resource
    Electronic Resource
    Antigenic Structure of Non-Infectious Adenovirus Materials (1960)
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 571-572 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the present investigation, an attempt was made to establish more precisely the relationship between antigens B and C. The virus material used was obtained from HeLa cells infected with the prototype strain of adenovirus type 5. A partially purified antigen was prepared by treatment of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/186571a0
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  • 4
    Electronic Resource
    Electronic Resource
    Classification of defects in cork planks using image analysis (1996)
    Springer
    Wood science and technology 30 (1996), S. 207-215 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary Image analysis techniques were used on cork surfaces of transverse sections of planks and multivariate analysis was applied to differentiate pores (lenticular channels) from important defects such as nail (horizontal and vertical) and insect galeries. The discriminant analysis showed that the variables area, perimeter, specific length and width, diameters in the radial and in the tangential direction, as well as the optical density could be combined in three discriminant functions that could make the classification. Defect specific classification functions gave good results for the automatic classification of pores, insect galeries and horizontal nail (error 〈10%), and acceptable for vertical nail (20% error).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00231634
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  • 5
    Electronic Resource
    Electronic Resource
    Chemical composition and variability of cork from Quercus suber L. (1988)
    Springer
    Wood science and technology 22 (1988), S. 211-218 
    Details
    ISSN: 1432-5225
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary The chemical composition of cork from Quercus suber L. was determined for virgin cork and for reproduction cork. Average chemical composition of virgin cork is: ash 0.7%, total extractives 15.3%, suberin 38.6%, lignin 21.7% and polysaccharides 18.2%. The carbohydrate composition shows that glucose represents 50.6% of all monosaccharides, xylose 35.0%, arabinose 7.0% and galactose and mannose, respectively, 3.6% and 3.4%. Reproduction cork has a composition similar to virgin cork. For the cases studied, reproduction cork had however less extractives and a higher amount of suberin. Significant differences were found for the chemical composition of virgin cork in relation to location of extractives and polysaccharide content. The between-tree variability was large and a variation within the tree was also recorded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00386015
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  • 6
    Electronic Resource
    Electronic Resource
    Crystallization of a Second Adenovirus Protein (the Fibre) (1971)
    [s.l.] : Nature Publishing Group
    Nature 230 (1971), S. 456-457 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Human adenovirus type 5 (Ad 5) was propagated in mono-layers of KB cells, and the soluble antigens were extracted as previously described6. Briefly, fluoro-carbon extracts of infected cells were centrifuged in caesium chloride density gradients to band the virus, and the material remaining above ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/230456a0
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  • 7
    Electronic Resource
    Electronic Resource
    Not a MAFF gaff (1976)
    [s.l.] : Nature Publishing Group
    Nature 263 (1976), S. 634-634 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,?The attack by Kenneth Mellanby in your issue of September 16 (pi86) quotes recent newspaper interpretations of (reports by the Ministry of Agriculture, Fisheries and Food (MAFF) but does not quote from the reports themselves, which are a strictly factual account of our food supply. The MAFF ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/263634a0
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  • 8
    Electronic Resource
    Electronic Resource
    Swine influenza (1976)
    [s.l.] : Nature Publishing Group
    Nature 261 (1976), S. 10-10 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR,?The recent description of a human outbreak of influenza virus in an American military camp has justifiably given rise to a great deal of concern. The possibility that the virus involved might cause a severe pandemic must be seriously considered and it is perfectly understandable that vigorous ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/261010a0
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  • 9
    Electronic Resource
    Electronic Resource
    Antigenic Relationship between Influenza A Viruses of Human and Avian Origins (1967)
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 982-983 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the course of a comparative study of influenza A viruses isolated from man, pigs, horses and birds, a reciprocal cross reaction between human A2 viruses and a strain of avian origin (A/turkey/Massachusetts/3740/65) was detected in haemagglutination-inhibition (HAI) tests performed with sera from ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/215982a0
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  • 10
    Electronic Resource
    Electronic Resource
    Crystallization of an Adenovirus Protein (The Hexon) (1968)
    [s.l.] : Nature Publishing Group
    Nature 219 (1968), S. 946-947 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We describe here the crystallization of the hexon of the human adenovirus type 5. The prototype strain of this virus (AD 75) was propagated in HeLa cells, and the viral components were extracted from infected cells as described previously5'6. Extracts of infected cells treated with fluoro-carbon ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/219946a0
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