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  • 1
    Electronic Resource
    Electronic Resource
    Milch und Käse (1915)
    Springer
    European food research and technology 29 (1915), S. 79-92 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02025619
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  • 2
    Electronic Resource
    Electronic Resource
    Trink- und Gebrauchswasser (1915)
    Springer
    European food research and technology 29 (1915), S. 222-233 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02025757
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  • 3
    Electronic Resource
    Electronic Resource
    Activity Coefficients of Salts in Anhydrous Acetic Acid Solutions from Solubility Measurements (1933)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 55 (1933), S. 3081-3088 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01335a005
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  • 4
    Electronic Resource
    Electronic Resource
    Activity Coefficients of Sulfuric Acid in Anhydrous Ethyl Alcohol from Electromotive Force Data (1935)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 57 (1935), S. 2542-2544 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01315a066
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  • 5
    Electronic Resource
    Electronic Resource
    Polymorphism of mannose phosphate isomerase in North Sea and Baltic Sea populations of the amphipods Gammarus zaddachi and G. salinus (1982)
    Springer
    Marine biology 71 (1982), S. 163-166 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic variation at the mannosephosphate isomerase (MPI) locus was examined in the euryhaline sibling species Gammarus zaddachi Sexton and G. salinus Spooner. Both crustacean amphipods share identical enzyme mobilities, following electrophoresis on vertical starch gels. The MPI locus turned out to be highly polymorphic; it is encoded by 6 alleles in G. zaddachi and 7 alleles in G. salinus. Geographic variation of allelic diversity was studied in samples from 9 G. zaddachi and 10 G. salinus populations, primarily obtained from Baltic Sea and North Sea sites. Patterns of inter- and intraspecific heterogeneity are described. Differences in allelic composition exist between Baltic and North Sea samples of G. salinus. In G. zaddachi, levels of polymorphism are higher in North Sea populations than in those from Baltic Sea areas. The significance of these findings is discussed in the light of previous biochemical genetic investigations on the population structure of the two amphipods considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00394625
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  • 6
    Electronic Resource
    Electronic Resource
    Genetic variation between geographic populations of the amphipods Gammarus zaddachi and G. salinus (1981)
    Springer
    Marine biology 64 (1981), S. 105-115 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Spatial and temporal patterns of gene-enzyme variation were estimated in the sibling species Gammarus zaddachi Sexton and G. salinus Spooner by starch gel electrophoresis. Twenty-one G. zaddachi and 18 G. salinus populations from coastal and estuarine areas in the Baltic Sea, North Sea and other localities of north-western Europe were surveyed. Both amphipods display similar electrophoresis patterns of the enzyme systems studied. Considerable interspecific and interpopulational differences were detected in allele frequencies at three highly polymorphic loci, phosphoglucose isomerase (PGI), glutamate oxalacetate transaminase (GOT) and arginine phosphokinase (APK). G. zaddachi exhibits a pronounced genetic heterogeneity in most areas of the sampled range. Populations from northern French and western English coasts differ significantly from the other samples in allele frequencies at the PGI or APK locus, respectively. Baltic populations are widely uniform in their genetic composition but can be distinguished from samples taken at North Sea sites in allele frequencies at the APK locus. The latter reveal a clinal variation, ranging from the Danish to the French coast. In contrast to G. zaddachi, a low degree of genetic differentiation was observed among the G. salinus populations examined. This indicates that migration and interregional mixing may be more important in maintaining the genetic structure than in G. zaddachi which, compared to G. salinus, prefers habitats of lower salinity levels. Evidently, less extensive dispersal capabilities owing to the confinement of G. zaddachi to brackish waters of dilute salt concentrations may account for a diminished gene flow and considerable genetic separation of local populations. This assumption is supported by the genetic homogeneity documented in Baltic G. zaddachi populations. In view of the low and constant salinities in wide areas of this brackish-water sea such barriers do not exist. Survey studies performed with selected populations over a 3-yr period demonstrated a general pattern of temporal constancy in the allozyme variation observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397099
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  • 7
    Electronic Resource
    Electronic Resource
    Genetic differentiation between populations of Talitrus saltator and Talorchestia deshayesii (Crustacea: Amphipoda) from coastal areas of the north-western European continent (1986)
    Springer
    Marine biology 92 (1986), S. 525-536 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Electrophoretic studies of gene-enzyme variation in the littoral talitrids Talitrus saltator (Montagu) and Talorchestia deshayesii (Audouin) were undertaken to estimate the amount of divergence among geographically separated populations. Samples of both species were taken from sandy beaches over a transect of approximately 3 500 km along the coast of the European continent including Baltic, North Sea and Atlantic locations. A total of 22 T. saltator and 15 T. deshayesii populations were analysed for genetic variation at various enzyme loci. Both amphipods revealed relatively low levels of polymorphism and heterozygosity. Among the loci studied, phosphoglucose isomerase (Pgi) and phosphoglucomutase (Pgm) were highly polymorphic. Patterns of micro- and macrogeographic variation in terms of distributions of allele frequencies at these particular loci are compared. Interpopulation allozymic variation was shown to be lower in T. deshayesii than in T. saltator. As demonstrated by T. saltator populations sampled in coastal sites ranging from Denmark to western France, clinal variation in frequencies of two alleles became evident at the PGI locus, exhibiting a steady increase in the level of polymorphism with decreasing latitudes. It is argued that limited gene flow and, to some extent, random genetic drift may account for the gene pool structure of the talitrid species investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392512
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  • 8
    Electronic Resource
    Electronic Resource
    On modular units (1989)
    Springer
    Mathematische Annalen 285 (1989), S. 503-510 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01455070
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  • 9
    Electronic Resource
    Electronic Resource
    Patterns of the isoenzymes of creatine kinase in teleostean fish
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 42 (1972), S. 221-226 
    Details
    ISSN: 0305-0491
    Keywords: Creatine kinase ; creatine kinase in teleostean fish ; isoenzymes
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0305-0491(72)90268-4
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  • 10
    Electronic Resource
    Electronic Resource
    Effects of stocking on the genetic diversity of brown trout populations of the Adriatic and Danubian drainages in Switzerland (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 47 (1995), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: This study focuses on genetic variation of brown trout Salmo trutta populations of the Adriatic and Danubian drainages in Switzerland. The allozyme and other protein loci data show a major replacement of native stocks from the Adriatic drainages by introduced hatchery trout of Atlantic basin origin. In most samples, diagnostic alleles for the Adriatic form of Salmo trutta f. fario and for the marbled trout Salmo trutta marmoratus are found at very low frequencies (f〈0.15). Taking into account previous genetic studies on brown trout of this basin, the Danubian samples are not heavily contaminated with foreign alleles. The results are consistent with records of local stocking activities which account in part for the high introgression rates of Atlantic alleles into local populations of the Adriatic drainages. In addition, introgression is enhanced by a decrease of natural reproduction which is caused by a deterioration of trout habitats through human activities. Furthermore, a third mechanism is proposed that may contribute to the high introgression rates observed: if Atlantic trout are introduced, the reproductive barriers between the two native forms, marbled trout and Adriatic fario respectively, break down. Atlantic trout apparently hybridize with both native forms and generate gene flow between them. In some parts of Adriatic drainages in Switzerland, the patterns of introgression and hybridization are further complicated by introduction of trout from the Danubian system. Alleles of the marbled trout are also found in the samples of the Danubian drainage system. These are due to stocking activities across the watershed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1995.tb06057.x
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