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  • Articles  (73)
  • Springer  (67)
  • International Union of Crystallography  (3)
  • Public Library of Science  (3)
  • American Chemical Society (ACS)
  • MDPI Publishing
  • Molecular Diversity Preservation International (MDPI)
  • Biology  (73)
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  • Articles  (73)
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  • 1
    Electronic Resource
    Electronic Resource
    Spasmin-like proteins in various ciliates revealed by antibody to purified spasmins ofCarchesium polypinum (1988)
    Springer
    Cellular and molecular life sciences 44 (1988), S. 768-771 
    Details
    ISSN: 1420-9071
    Keywords: Spasmin-like proteins ; Carchesium ; Vorticella ; Stentor ; Spirostomum ; Blepharisma ; immunoblotting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary It was found that some ciliates,Stentor, Spirostomum andBlepharisma, which can contract rapidly like the stalks of Vorticellidae, have Ca2+-binding proteins that are very similar to spasmins, in the immunological sense. The presence of spasmins in other Protozoa and in some Metazoa was also investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01959159
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of oridonin, aRabdosia diterpenoid, on radiosensitization with misonidazole (1987)
    Springer
    Cellular and molecular life sciences 43 (1987), S. 1221-1223 
    Details
    ISSN: 1420-9071
    Keywords: Oridonin ; Rabdosia diterpenoid ; thiol-reactive agent ; misonidazole ; radiosensitizer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The radiosensitization brought about by oridonin, one of theRabdosia diterpenoids, alone or in combination with misonidazole, was investigated in Chinese hamster V79 cells. The enhancement ratio of 1.92 was obtained when 0.01 mM oridonin and 1 mM misonidazole were administered to hypoxic cells under radiation. The enhancement ratios of oridonin and misonidazole for hypoxic cells were 1.16 and 1.59 respectively. Hence, a supra-additive effect was obtained by the combined treatment with these two drugs. Under aerobic conditions, no effect of 0.01 mM oridonin on the radiosensitization caused by misonidazole was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01945533
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  • 3
    Electronic Resource
    Electronic Resource
    Trace element, analytical chemistry in medicine and biology (1981)
    Springer
    Origins of life and evolution of the biospheres 11 (1981), S. 395-395 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931493
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  • 4
    Electronic Resource
    Electronic Resource
    Identification and quantification of nucleic acid bases in carbonaceous chondrites (1986)
    Springer
    Origins of life and evolution of the biospheres 16 (1986), S. 226-227 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02421995
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  • 5
    Electronic Resource
    Electronic Resource
    The evolution of the environment and its influence on the evolution of life (1978)
    Springer
    Origins of life and evolution of the biospheres 9 (1978), S. 81-91 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Thermodynamic data and known paleogeological data were used to deduce when and what elements (compounds) were readily available during the whole history of the earth. On the basic assumption that available compounds would dictate the type of organisms to emerge, we attempted to derive a kind of evolutionary tree. This was then compared with the existing evolutionary trees derived from the sequences of proteins and polynucleotides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931406
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  • 6
    Electronic Resource
    Electronic Resource
    Specific reaction of aloe extract with serum proteins of various animals (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 523-524 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We found that aloe extract contains a lectin-like substance which reacts with serum proteins of various animals. Furthermore, in human serum 2 proteins,a 2-macroglobulin anda 1-antitrypsin, were shown to be reactive with aloe extract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01935968
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  • 7
    Electronic Resource
    Electronic Resource
    Mauritius type black rats with peculiar karyotypes derived from robertsonian fission of small metacentrics (1979)
    Springer
    Chromosoma 75 (1979), S. 51-62 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract All seventeen black rats collected from Mauritius Island were characterized by having many extra small acrocentric autosomes. Their basic karyotype was of Oceanian type, because of the presence of the large metacentric M1 and M2 pairs, but chromosome numbers in 13 specimens among them were 42, those of 3 specimens 43, and those of the remaining one specimen 44. Although the Oceanian type rat had 2 small acrocentric autosomes (pair no. 13), 16 Mauritius rats had 10 small acrocentrics, and the remaining one had 8 small acrocentrics. Comparative karyotype analysis between Oceanian and Mauritius type rats showed that the extra small acrocentrics found in Mauritius rats were due to Robertsonian fission of small metacentric pairs no. 14 and 18 of the original Oceanian type rat. Only one rat with 8 small acrocentrics showed the heteromorphic pair no. 18 consisting of one metacentric and two acrocentrics. The large metacentric M1 chromosome in 13 of 17 rats examined showed homologous pair, but two of them were heteromorphic by involving one metacentric M1 and two acrocentrics. In the remaining two rats M1 chromosome was not observed, but acrocentric pairs no. 4 and 7 were included. These acrocentrics were also suggested to be originated from Robertsonian fission of the large metacentric M1 chromosome. Robertsonian fission seemed to be one of the important mechanism found in karyotype evolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330624
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  • 8
    Electronic Resource
    Electronic Resource
    Nitrogen content in feces and the diet of Sika deer on the Boso Peninsula, central Japan (1999)
    Springer
    Ecological research 14 (1999), S. 249-253 
    Details
    ISSN: 1440-1703
    Keywords: Cervus nippon ; density-dependent limitation ; fecal nitrogen ; rumen nitrogen ; seasonal fluctuation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Fecal and rumen nitrogen content of Sika deer (Cervus nippon Temminck 1838) on the Boso Peninsula, central Japan, were analyzed concerning their seasonal fluctuations and local differences at four areas on the Boso Peninsula. The mean fecal nitrogen was high in August and low in February in all the areas. The seasonal variation, however, was relatively small. This may be the result of the following reasons: the Boso deer feed on evergreen broad-leaves containing a high and stable nitrogen content in winter; little snow falls there; and the deer consume foods relatively low in nitrogen in summer. The fecal and rumen nitrogen content in both summer and winter depended on deer density.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1440-1703.1999.143303.x
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  • 9
    Electronic Resource
    Electronic Resource
    Population dynamics of japanese serow in relation to social organization and habitat conditions. I. Stability of Japanese serow density in stable habitat conditions (1993)
    Springer
    Ecological research 8 (1993), S. 11-18 
    Details
    ISSN: 1440-1703
    Keywords: density stability ; habitat ; Japanese serow (Capricornis crispus) ; population dynamics ; social organization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The density of a Japanese serow (Capricornis crispus) population, which has been in stable habitat conditions and free from hunting and predation, was investigated by direct observation of serows at Kusoudomari (336 ha), Wakinosawa village, Aomori Prefecture, Japan, during 1977–89. The vegetation, composed of mature mixed forest ofThujopsis with deciduous trees (43.2%), secondary forest of deciduous trees (23.4%) and a plantation of coniferous trees (30.0%) showed little change during the study period. The serows were counted 17 times each winter for 14 consecutive years. The serow population maintained a stable density with a mean of 12.5 individuals km−2 (SD=1.4) ranging from 8.6 to 14.6 km−2. The ratio of the proportion of kids (〈1 year old) to serows more than 1 year old decreased, but density did not decrease during the study period. Though extremely severe winters with heavy snowfall in 1984–86 caused a decline in serow density, the density recovered within a few years. It was considered that the stability of the serow density resulted mainly from the stable food supply and the lack of human disturbance, such as forest cutting in the habitat. Stable population density for a long period is probably related to the social organization of the serow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02348602
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  • 10
    Electronic Resource
    Electronic Resource
    Cytological evidence for different types of cerebrospinal fluid-contacting subependymal cells in the preoptic and infundibular recesses of the frog (1977)
    Springer
    Cell & tissue research 176 (1977), S. 317-334 
    Details
    ISSN: 1432-0878
    Keywords: CSF-contacting subependymal cells ; Frog hypothalamus ; Fluorescence microscopy ; Autoradiography ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Blue-green fluorescent subependymal cells with intraventricular processes were shown by the fluorescent histochemical method to be distributed from the preoptic recess to the infundibular recess of the frog hypothalamus. Electron microscopy revealed at least two types of CSF-contacting subependymal cells, type 1 containing large dense granules (about 100–200 nm in diameter) and type 2 containing small dense core vesicles (about 60–100 nm in diameter). Subsequent to fixation in permanganate solution, the small dense core vesicles in type 2 cells reacted with the fixative and consistently showed a dense content. However, the large granules in type 1 cells were mostly pale or less dense after this fixation. Two hours after intraventricular injection of 3H-dopamine, a large number of silver grains appeared only in the cytoplasm of intraventricular processes possessing dense core vesicles (type 2 cells). A few grains were also found in the perikarya. It is concluded that type 2 cells are catecholamine-storing cells. It is suggested that type 1 cells in the infundibular recess are peptidergic neurons which may secrete some hypothalamic regulating hormones of the anterior pituitary. Most of these cells in the preoptic recess belong to the neurosecretory cells of the preoptic nucleus, while some cells probably function similarly to those in the infundibular recess.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221791
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