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  • 1990-1994  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Hard x-ray diagnostics for laser fusion plasmas analysis : Proceedings of the 9th topical conference on high temperature plasma diagnostics (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 5097-5100 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Two diagnostics for the study of hard x-ray emission produced by plasmas during inertial confinement fusion experiments, are described: (i) a hard x-ray spectrometer to measure the high-energy tail of the spectrum, with eight spectral bands in the 50–400-keV range, by fluorescence and simple filter techniques; (ii) a time-integrated pinhole imaging device using a microchannel plate converter tube and a 7.5-μm-thick tantalum photocathode adjusted for a mean spectral sensitivity around 200 keV. Adjustment and test of these diagnostics have been performed with a pulsed hard x-ray generator using a plasma focus device. Absolute calibration of the spectrometer detectors (scintillator Photomultiplier) was obtained on an x-ray tube with fluorescent emission lines (10–100 keV) and with a cobalt radioactive source at 1.23 MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143450
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of Brining and Packing Conditions on Product Quality of Capers (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 55 (1990), 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: The effects of brine concentration (5.7.10.15 and 20% NaCl) on pre-treatment of capers to improve preservation and packing conditions (3–10% salt, 0–1.5% acetic acid and pasteurization) on product stability were studied. All brines containing 10% salt and higher proved equally adequate for the preservation of capers at least for 27 months. The finished products manufactured from stock held in such brines had typical texture flavor and color. The use of lower concentration brines led to off-flavor development and softening of the product. Pasteurization (80°C, 15 min) of the finished product proved efficient for preventing spoilage. Non-pasteurized samples required high salt (ca 6%) and acid (ca 1%) levels for preservation. Otherwise, a yellow sediment developed as a consequence of microbial growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1990.tb06051.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    210Pb as a dietary indicator in the Antarctic pelagic community (1993)
    Springer
    Marine biology 115 (1993), S. 161-171 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The naturally occurring radionuclide 210Po is useful as a tracer of diets of marine organisms. Data for 210Pb, the grandparent of 210Po, are less abundant: we therefore report here 210Pb concentrations in a substantial collection of marine biota obtained from the Antarctic Ocean during the SIBEX II cruise in 1985. The general levels of 210Pb are within the range of previously published data but, as in the case of 210Po, there are differences which can be associated with variations in the diet of the organism. The levels of 210Pb in the krill Euphausia superba show seasonal changes which can be interpreted in terms of changing diet. In a simple classification of the pelagic food chain, the levels of 210Pb tend to increase from omnivores to filter-feeders to predators.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349398
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    International scientific collaboration in Arab countries (1992)
    Springer
    Scientometrics 23 (1992), S. 249-263 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract Through internationally coauthored scientific articles in the Science Citation Index data base, we analyse international collaboration of some Arab countries in science. Our findings show that international collaboration of these countries is concentrated on engineering & technology and fundamental & applied biology. Collaboration is often established through doctoral studies and the links thus created continue. Cultural and historical traditions play an important role in collaboration. We compare the SCI data base with a local survey of chemists in Morocco and discuss some of the limits of bibliometric methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02020926
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    International scientific collaboration in Latin America (1992)
    Springer
    Scientometrics 24 (1992), S. 373-392 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract This study attempts to analyse the usability of international databases such as the Science Citation Index (SCI) for the observation of the international collaboration in lesser-developed countries. We have examined the adequacy of this data source (the SCI) in perceiving the international scientific activities of nine Latin American countries. We have studied the relationships of these countries with their main foreign partners in the large fields of science. It has been observed that some of these relationships are not covered by the data source under study. The creation of an information system storing complementary data suited for the identification of existing internatinal collaborative projects is recommended. In the longrange future such a system would provide more appropriate information for the analyses of international collaboration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02051036
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Structure of international collaboration in science-part II: Comparisons of profiles in countries using a link indicator (1994)
    Springer
    Scientometrics 29 (1994), S. 271-297 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract In this article, the behaviors of countries in scientific production activities are investigated using an asymmetrical matrix system to analyze data collected from theScience Citation Index. Examination of international collaboration, intercountry relationships, and domestic scientific output patterns structured by 98 countries in eight principal fields of science reveal diverse aspects of country behaviors. Three asymmetrical matrixes are established and the multidimentional Minimum Spanning Tree technique is applied to classify, visualize and determine the distinctive characteristics of country profiles. Investigations are conducted at both a macro (country behavior) and a micro (particular city behavior) level in order to demonstrate the applicability of the methodology and to obtain global observations of country behaviors. It is argued that these methods contribute to reveal traditions and policies of countries, universities and research organizations as well as that of the international network of scientific exchange. Further usage of these methodologies is advocated for policy analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02017977
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Little scientometrics, big scientometrics ... and beyond (1994)
    Springer
    Scientometrics 30 (1994), S. 443-445 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02018121
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Structure of international collaboration in science: Typology of countries through multivariate techniques using a link indicator (1992)
    Springer
    Scientometrics 25 (1992), S. 321-351 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract In this article patterns of international collaboration in science are investigated using a specific procedure to analyse data collected from theScience Citation Index. We develop an indicator based on the scientific linkages between countries established through internationally co-authored articles (COPs). The credibility, advantages and uses of this indicator are discussed. We apply the Correspondence Factorial Analysis method and the Minimum Spanning Tree classification to this indicator in order to observe the level of resemblance and the main characteristics of the collaboration structured by 98 countries in eight principal fields of science. The results shown summarize the diverse aspects of countries participating in collaborative works and bring into view the cognitive structure of international research. The use of these methods in the investigation of international collaboration contributes to the analysis of the complex structure of the scientific communities of different countries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02028090
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    Paper (German National Licenses)
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