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  • 1
    Electronic Resource
    Electronic Resource
    Rescue of SV40 following transfection of TC7 cells with cellular DNAs containing complete and partial SV40 genomes (1982)
    Springer
    Molecular genetics and genomics 186 (1982), S. 78-81 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Infectious SV40 virions could be rescued from permissive TC7 cells within one to three subcultures following cotransfection with two cellular DNAs, each containing a complementary portion of the SV40 genome. SV40 virions could also be rescued by transfection of TC7 cells with cellular DNAs from a variety of SV40 transformed cells containing complete genome equivalents but not from cells containing subgenomes alone or defective genomes. Infectious virus was not rescued if the transfecting DNA species was treated with DNAase or if the DEAE-dextran pretreatment of the recipient cells was omitted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422915
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  • 2
    Electronic Resource
    Electronic Resource
    Morphological and genetic variation in Japanese populations of the anemonefish Amphiprion clarkii (1982)
    Springer
    Marine biology 72 (1982), S. 99-108 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Geographic populations of the anemonefish Amphiprion clarkii (Bennett) from 6 widely separated locations off the coast of southern Japan are morphologically different, exhibiting (1) latitudinal clinal patterns in color pattern and meristics and (2) degrees of genetic differentiation. Electrophoretic examination of 7 polymorphic loci (95% level) among 6 populations collected between July 1979 and January 1980 revealed an average genetic distance value of 0.008. Significance was demonstrated for 39 out of 105 (37%) tests of heterogeneity. Averaged over the 6 populations, the percentage of polymorphic loci ( $$\bar P$$ 0.95) was 24.6% and the proportion of heterozygous loci per individual ( $$\bar H$$ ) was 0.0613. The results indicate that genetic clines are absent and suggest that the morphological variation may not be genetic. Relative isolation of genetic populations may be maintained by (1) localized larval dispersal resulting from a relatively short larval stage, and (2) current gyres tending to trap larvae, increasing the return of juveniles to their adult coastal habitat. Morphological clines may be due to clines in ecological parameters related to latitude.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00396909
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  • 3
    Electronic Resource
    Electronic Resource
    Long-term starvation-induced loss of antibiotic resistance in bacteria (1990)
    Springer
    Microbial ecology 19 (1990), S. 251-257 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Escherichia coli, Pseudomonas fluorescens, and aPseudomonas sp. strain 133B containing the pSa plasmid were starved in well water for up to 523 days. There were two patterns of apparent antibiotic resistance loss observed. InPseudomonas sp. strain 133B, there was no apparent loss of antibiotic resistance even after starvation for 340 days. InE. coli, by day 49 there was a ten-fold difference between the number of cells that would grow on antibiotic- and nonantibiotic-containing plates. However, over 76% of the cells that apparently lost their antibiotic resistance were able to express antibiotic resistance after first being resuscitated on non-selective media. By day 523, only 12% of these cells were able to express their antibiotic resistance after being resuscitated. After starvation for 49 days, cells that could not grow on antibiotic medium even after resuscitation, showed a permanent loss of chloramphenicol (Cm) resistance but retained resistance to kanamycin (Km) and streptomycin (Sm). Restriction enzyme digests show that a 2.5 to 3.0 Kb region from map location 12.5 to 15.5 Kb was deleted. This coincides with the 2.5 Kb reduction in plasmid size observed in 3 isolates that had lost antibiotic resistance after starvation for 49 days.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02017169
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  • 4
    Electronic Resource
    Electronic Resource
    Prediction of Complexation Properties of Crown Ethers Using Computational Neural Networks (1997)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 27 (1997), S. 201-213 
    Details
    ISSN: 1573-1111
    Keywords: Crown ethers ; complexes ; stability constants ; structure-property relationships ; computational neural networks
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A computational neural network method was used for the prediction of stability constants of simple crown ether complexes. The essence of the method lies in the ability of a computer neural network to recognize the structure-property relationships in these host-guest systems. Testing of the computational method has demonstrated that stability constants of alkali metal cation (Na+, K+, Cs+)-crown ether complexes in methanol at 25 °C can be predicted with an average error of ±0.3 log K units based on the chemical structure of the crown ethers alone. The computer model was then used for the preliminary analysis of trends in the stabilities of the above complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007928814162
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  • 5
    Electronic Resource
    Electronic Resource
    Early sex change: A possible mating strategy ofCentropyge angelfishes (Pisces: Pomacanthidae) (1984)
    Springer
    Journal of ethology 2 (1984), S. 63-67 
    Details
    ISSN: 1439-5444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Although the presence of socially controlled sex change in pomacanthid fishes of the genusCentropyge has been known since 1978, it has always been assumed that such sex change occurred only after the death or disappearance of the dominant male in single male social groups. Between 1978 and 1983, we observed several incidences of sex change by ranking female angelfishes within their harems and in the presence of the dominant male in each such harem. This phenomenon was observed inCetropyge interruptus andCentropyge tibicen, and occurred frequently enough to suggest the possibility of early sex change as a normal reproductive strategy in these species. Possible advantages of early sex change are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02348208
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  • 6
    Electronic Resource
    Electronic Resource
    Social organization and reproductive behavior of ostraciid fishes from Japan and the Western Atlantic Ocean (1984)
    Springer
    Journal of ethology 2 (1984), S. 85-98 
    Details
    ISSN: 1439-5444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Social organization and reproductive behavior were studied in 4 species of ostraciid fishes.Lactoria fornasini andLactoria diaphana from Japan andAcanthostracion polygonius from the western Atlsnyiv were usually found in single male, haremic social groups, although the latter 2 species usually included only 2 females per harem, and individuals in all 3 species foraged solitarily. Elements of both “resource defense” and “female defense” (Emlen & Oring 1977) were evident in the 2Lactoria species, and female defense appeared particularly intense inL. diaphana. Resource defense was apparent inA. polygonius. Lactophrys triquetor occurred in lek-like breeding assemblages at Curacao (Netherlands Antilles) and on the Atlantic coast of Panama. These variations in social organization are discussed and a relationship with feeding habits is suggested. All 4 species appear to be gonochores (demonstrated inLactoria by Moyer 1979). The 2Lactoria spp. showed operational sex ratios (OSR: Emlen & Oring 1977) approaching 1∶1 and a high degree of female spawning synchrony. The occurrence of polygyny in species with 1∶1 OSRs and female spawning synchrony is discussed with reference to the Knowlton (1979) model which predicts monogamy to occur in such situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02430572
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  • 7
    Electronic Resource
    Electronic Resource
    Influence of turbulence on electrokinetic phenomena; experimental determination of the thickness of the diffuse part of the double layer (1956)
    Springer
    Cellular and molecular life sciences 12 (1956), S. 371-371 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Durch Messungen in 10−5, 10−4 und 10−3 N benzolischen Lösungen von Zn-di-i-propylsalizylat haben wir einen beträchtlichen Einfluss von Turbulenz auf Strömungsströme feststellen können. Dieser Einfluss kann ausgedrückt werden durch einen Faktorf, der in einem unserer Experimente einen Wert vonf=66 erreichte; aus den Werten vonf kann die Dicke der diffusen Doppelschicht in der Flüssigkeit berechnet werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157270
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  • 8
    Electronic Resource
    Electronic Resource
    Electron microscopic observations on phagocytosis of rabbit spermatozoa in the female genital tract (1965)
    Springer
    Cellular and molecular life sciences 21 (1965), S. 6-7 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La phagocytose intrautérine est un phénomène physiologique et non spécifique qui se produit par la présence de divers corps étrangers y-compris les spermatozoïdes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02136350
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  • 9
    Electronic Resource
    Electronic Resource
    Thyroid and pituitary gland activity during compensatory renal hypertrophy (1964)
    Springer
    Cellular and molecular life sciences 20 (1964), S. 694-696 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Des études autoradiographiques avec la thymidine tritiée ont mis en évidence l'augmentation de la synthèse de l'acide déribonucléïque et la prolifération cellulaire de la thyroïde et de la pituitaire pendant l'hypertrophie compensatoire rénale. Les sections de la glande thyroïde de rats néphrectomisés unilatéralement montraient une plus grande activité des follicules columnaires et perte de colloïde.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02145279
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  • 10
    Electronic Resource
    Electronic Resource
    Effect of alcohol on experimental atherosclerosis in rabbits (1960)
    Springer
    Naturwissenschaften 47 (1960), S. 138-138 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00628524
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