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  • 1
    Digitale Medien
    Digitale Medien
    Ecological aspects of deformed chaetognaths and visual observations of their periphytes (1985)
    Springer
    Marine biology 87 (1985), S. 67-75 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Preserved samples of chaetognaths (Sagitta crassa) in Tokyo Bay contained normal specimens and knotty and flabby deformed ones. On the body surfaces of both normal and deformed specimens, three different types of periphyte were observed by a scanning electron microscope (SEM): branch-like growths, large numbers of filaments and protuberances. Some branch-like growths frequently covered almost the entire body of even normal chaetognaths. Bacteria were only observed on the abnormal specimens. Bacterial colonization occurred inside the body rather than on the body surface. Due to the growth of bacteria, muscles degenerated and chaetognaths became abnormally knotty and flabby. Abnormal chaetognaths occurred in Tokyo Bay more frequently in July 1979 (12.4%) than in June 1982 (3.9%). Food containing ratio (FCR) values, an indication of feeding activity, of the abnormal chaetognaths were less than 10% and no feeding rhythm was found, whereas normal chaetognaths had high FCR values with a maximum peak (more than 60%) between 20.000 and 23.000 hrs. Abnormal specimens sometimes had spermatophores on their body surfaces. It is obvious that abnormal chaetognaths had still been alive in the sea and that some of them not only fed on copepods but also copulated. However, feeding activity and reproductive behaviour were far lower in abnormal chaetognaths than in normal ones. Abnormal specimens were not larger than 9.0 mm and their mean body length was smaller than that of normal chaetognaths. This suggests that bacterial infection directly affects the mortality of the chaetognath population.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00397007
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Scanning electron microscopy investigation of bacterial colonization of the marine copepod Acartia clausi (1985)
    Springer
    Marine biology 87 (1985), S. 61-66 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Association between copepods and bacteria was observed in many scanning electron micrographs. Particular sites on the copepods were selectively colonized by bacteria; the joints of segments and legs, swimming legs and depressed parts of the body surface were found to be densely covered with bacteria. In comparison, bacterial attachment to copepod skeletons in fecal pellets excreted by chaetognaths was not selective; bacteria were sparsely found all over the copepod. Between 9 to 30% of copepods in Tokyo Bay waters had attached bacteria in January and April 1983.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00397006
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 3
    Digitale Medien
    Digitale Medien
    Morphology of the gastric mill in ten species of euphausiids (1988)
    Springer
    Marine biology 97 (1988), S. 79-85 
    Details
    ISSN: 1432-1793
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract SEM observation revealed the detailed morphology of the gastric mill in ten species of euphausiids, Bentheuphausia amblyops, Thysanopoda acutifrons, Meganyctiphanes norvegica, Pseudeuphausia latifrons, Euphausia superba, Tessarabrachion oculatum, Thysanoessa longipes, Nematoscelis microps, Nematobrachion boopis, and Stylocheiron maximum. The well-developed gastric mill of euphausiids consists of a pair of cluster spines and a pair of lateral teeth displaying great diversity in morphology. It is suggested that there are three categories of gastric mill and filterpress (gland filter) within euphausiids. One is the well-developed gastric mill with filter-press of B. amblyops; a second is the well-developed gastric mill of M. norvegica, T. oculatum, E. superba, P. latifrons and T. longipes; and the third is the gastric mill without lateral teeth of T. acutifrons, N. microps, N. boopis and S. maximum.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00391247
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    The diet of mesopelagic fish from the Pacific coast of Hokkaido, Japan (1985)
    Springer
    Journal of oceanography 41 (1985), S. 89-97 
    Details
    ISSN: 1573-868X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie
    Notizen: Abstract The diet of at least 28 species of mesopelagic fish from the Pacific coast of Hokkaido was examined. The dominant family was the Gonostomatidae (42%) which was represented by five species. The most abundant species wasCyclothone atraria which together with the other species of this genus preyed predominantly on copepods. Euphausiids and copepods were dominant in the diet ofGonostoma gracile. The next most abundant family was the Myctophidae (32%) which was represented by seven species. The dominant species,Stenobrachius nannochir, preyed mainly on copepods. Copepods were also the dominant food item of the other myctophids except forLampanyctus jordani which fed mainly on euphausiids. The other important family was the Bathylagidae (21%).Leuroglossus schmidti was the dominant species and its diet was more diverse with ostracods, copepods, molluscs and larvaceans being the most important food items.Bathylagus ochotensis had a similar diet. Copepods were the most important food items for all but a few species and their occurrence in the fish stomachs was related to the known vertical distribution of both predators and prey. Ostracods and euphausiids were also important prey items, the latter especially in large fish species. Molluscs and larvaceans were restricted to the two species of the family Bathylagidae.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02109178
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Portable device for monitoring oxygen uptake (1986)
    Springer
    Medical & biological engineering & computing 24 (1986), S. 186-192 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Exercise ; Oxygen sensing ; Oxygen uptake ; Respiration
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02443934
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Improved probe for a deep body thermometer (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 456-459 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Body temperature ; Deep body thermometer ; Sublingual temperature ; Zero heat-flow method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02442312
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
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    Structural basis of reverse nucleotide polymerization (2013)
    National Academy of Sciences
    Details
    Publikationsdatum: 2013-12-09
    Print ISSN: 0027-8424
    Digitale ISSN: 1091-6490
    Thema: Biologie , Medizin , Allgemeine Naturwissenschaft
    Publiziert von National Academy of Sciences
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
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    Towards a complete and continuous Wigner function for an ensemble of spins or qubits (2012)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2012-12-27
    Beschreibung: Author(s): Derek Harland, M. J. Everitt, Kae Nemoto, T. Tilma, and T. P. Spiller We present a quasiprobability distribution function for ensembles of spin-half particles or qubits that has many properties in common with Wigner's original function for systems of continuous variables. We show that this function provides clear and intuitive graphical representation of a wide variet... [Phys. Rev. A 86, 062117] Published Wed Dec 26, 2012
    Schlagwort(e): Fundamental concepts
    Print ISSN: 1050-2947
    Digitale ISSN: 1094-1622
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    Involvement of geranylgeranylation of Rho and Rac GTPases in adipogenic and RANKL expression, which was inhibited by simvastatin (2013)
    Wiley
    Details
    Publikationsdatum: 2013-01-23
    Beschreibung: Simvastatin suppresses myoblast differentiation via inhibition of Rac GTPase, which is involved in the mevalonic acid pathway that produces cholesterol. Statins also inhibit adipogenic differentiation and receptor activator of NFκB ligand (RANKL) expression, possibly through the mevalonic acid pathway, although the involvement of that pathway and effector proteins in these cellular events has not been fully clarified. In the present study, we aimed to elucidate the mechanism of the effects of simvastatin on adipogenic differentiation and calcitriol-induced RANKL expression in bone marrow stromal ST2 cells. Adipogenesis and mRNA up-regulation of peroxisome proliferator–activated receptor γ and adipocyte fatty acid–binding protein were induced by troglitazone, and those events were efficiently inhibited by simvastatin. In addition, RANKL expression induced by calcitriol was abrogated by simvastatin in ST2 cells. The inhibitory effects of simvastatin were adequately compensated by the addition of either mevalonic acid or an intermediate of the mevalonic acid pathway, geranylgeranyl pyrophosphate, but not by another intermediate, farnesyl pyrophosphate. These findings suggest that protein geranylgeranylation is related to cellular differentiation in those two directions. Furthermore, inhibitor analysis demonstrated that Rac GTPase is involved in adipogenic differentiation, whereas Rho GTPase was found to be involved in RANKL expression. Taken together, the present findings suggest that geranylgeranylation of Rho family GTPase is involved in both adipogenesis and RANKL expression of stromal cells, while Rac GTPase is involved in adipogenesis and Rho GTPase in RANKL expression. Copyright © 2013 John Wiley & Sons, Ltd.
    Print ISSN: 0263-6484
    Digitale ISSN: 1099-0844
    Thema: Biologie , Medizin
    Publiziert von Wiley
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
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    Role of Hyperfine Coupling in Magnetic and Quadrupolar Ordering of Pr_{3}Pd_{20}Si_{6} (2013)
    American Physical Society (APS)
    Details
    Publikationsdatum: 2013-08-15
    Beschreibung: Author(s): L. Steinke, K. Mitsumoto, C. F. Miclea, F. Weickert, A. Dönni, M. Akatsu, Y. Nemoto, T. Goto, H. Kitazawa, P. Thalmeier, and M. Brando We study the ternary clathrate Pr 3 Pd 20 Si 6 in specific heat and ac susceptibility measurements on a high-quality single crystal, distinguishing antiferromagnetic and antiferroquadrupolar ordering, as well as a hitherto unknown magnetic low-temperature transition. The specific heat shows the direct in... [Phys. Rev. Lett. 111, 077202] Published Wed Aug 14, 2013
    Schlagwort(e): Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Digitale ISSN: 1079-7114
    Thema: Physik
    Publiziert von American Physical Society (APS)
    Standort Signatur Erwartet Verfügbarkeit
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