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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 13 (1968), S. 364-366 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 80 (1958), S. 3016-3019 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 80 (1958), S. 1874-1876 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 43 (1971), S. 275-276 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 60 (1938), S. 62-64 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of the American Chemical Society 84 (1962), S. 3090-3092 
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Environmental geology 24 (1994), S. 112-124 
    ISSN: 1432-0495
    Keywords: Spring classification ; Spring origin ; Hydrogeology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Numerous geologic processes operate to form the many types of springs in existence today. Karst springs, glacial springs, and thermal springs are reviewed with examples from different parts of the world to emphasize the diversity of their origin. Since Meinzer's classification in 1927, the classification of springs has changed as our understanding of their origin and our scientific knowledge of springs have increased. Today several different classifications have been developed that concentrate on one or more specific characteristics such as size, mineral content, or temperature. A historic sketch of the classification of springs that documents the most common classifications in use is presented. From this historical perspective it is apparent how our understanding of springs, combined with technological advances, will affect future trends in the classification of springs. Eventually a definitive classification of springs, scientific as well as legal, combined with computer data bases, will aid not only in our academic understanding of springs, but in our practical usage. In the late 20th century, there has been increased demand for spring, mineral, and curative waters. Springs, specifically their origin, have become increasingly important. Legislation to protect the rights and safety of consumers regarding springs is forthcoming from state, federal, national, and international organizations. Some current legislation will be highlighted to provide some insight into how exactly these legal rulings affect our use and definitions of springs. The purpose of this paper is to establish the geological/ hydrogeological framework for the diversity of origin and form of springs in addition to providing a historical perspective on classification systems throughout the ages.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Intensive care medicine 25 (1999), S. 1463-1466 
    ISSN: 1432-1238
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 116 (1997), S. 367-374 
    ISSN: 1432-1106
    Keywords: Key words Binaural bands ; Wheat germ agglutinin-horseradish peroxidase ; Cortical columns ; Auditory system ; Corpus callosum ; Ferret
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The callosal connections of ferret auditory cortex were studied by making multiple injections of wheat germ agglutinin-horseradish peroxidase into the middle ectosylvian gyrus or by packing crystals of horseradish peroxidase into the transected corpus callosum. The primary area (AI) had strong callosal connections that arose from somata mainly located in layer III. Other layers contained sparsely distributed cells that projected across the midline. The projecting cells occurred over the whole extent of AI but were not homogeneously distributed in layer III. The axons from these cells terminated mainly in the upper layers of the contralateral cortex, where they converged onto three discrete bands. The three elongated bands lay in a dorsoventral orientation, parallel to the tonotopic axis. They were slightly curved and had a fairly uniform width. The posterior band had a width of about 200 μm, while the anterior and middle bands were more variable and had widths of 300–800 μm. The centre-to-centre distance between the posterior and middle bands was 520 ± 60 μm and for the anterior to middle bands was 620 ± 210 μm. The retrograde labelling produced by the same injections showed that the cell bodies had a higher density in the terminal bands than in the intervening spaces. The bands of dense callosal connections appear to correspond to the binaural summation columns, which have been clearly demonstrated in the ferret, but direct evidence of this will need to be sought in a future study. The discrete nature of the callosal bands in the ferret appears to make it a suitable species for studying the relationship between callosal terminals and those arising in other areas of the brain and for clarifying the possible existence of separate functional systems within the auditory cortex.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental brain research 117 (1997), S. 488-500 
    ISSN: 1432-1106
    Keywords: Key words Auditory system ; Neocortex ; 2-Deoxyglucose autoradiography ; Deafness ; Chemoarchitectonic areas ; Ferret
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Histological methods and 2-deoxyglucose autoradiography were used in an attempt at finding distinguishing characteristics that would permit the clear definition of different auditory areas on the ectosylvian gyrus. This region was studied in both coronal and flattened tangential sections. In tangential sections a crescent-shaped region of high deoxyglucose uptake was identified. The centre of this crescent was in the position of the primary auditory area on the middle ectosylvian gyrus. The ventro-anterior arm of the crescent was on the surface of the anterior ectosylvian gyrus and the ventro-posterior arm on the posterior ectosylvian gyrus. All three parts of the crescent appear to have an auditory function, because ablating the inferior colliculus or inserting a contralateral earplug reduced their deoxyglucose uptake. This was shown by using two separately distinguishable forms of 2-deoxyglucose, incorporating the 18F and 14C isotopes. In addition, another area of high deoxyglucose activity was identified in the ventral wall of the suprasylvian sulcus, which seems to correspond to the anterior auditory field. These four areas with high deoxyglucose uptake also have high levels of succinate dehydrogenase activity and moderately high densities of myelinated fibres. Succinate dehydrogenase histochemistry provides a simple method for identifying auditory cortical areas and should be of use in future physiological studies. These results provide evidence that the ferret has four separate auditory areas with relatively high metabolic and functional activity.
    Type of Medium: Electronic Resource
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