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  • Springer  (57)
  • American Chemical Society  (8)
  • Springer Nature  (3)
  • American Physical Society (APS)  (2)
  • Environmental & Engineering Geophysical Society (EEGS)
  • 1
    Electronic Resource
    Electronic Resource
    Synthetic studies on tetrodotoxin and related compounds. IV. Stereospecific total syntheses of DL-tetrodotoxin (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 9219-9221 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00781a039
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  • 2
    Electronic Resource
    Electronic Resource
    Synthetic studies on tetrodotoxin and related compounds. III. Stereospecific synthesis of an equivalent of acetylated tetrodamine (1972)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 94 (1972), S. 9217-9219 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00781a038
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  • 3
    Electronic Resource
    Electronic Resource
    Structure of wye (Yt base) and wyosine (Yt) from Torulopsis utilis phenylalanine transfer ribonucleic acid (1976)
    s.l. : American Chemical Society
    Biochemistry 15 (1976), S. 898-904 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00649a027
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  • 4
    Electronic Resource
    Electronic Resource
    Highly purified diapause hormone from the silkworm (1972)
    Springer
    Naturwissenschaften 59 (1972), S. 364-365 
    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/BF00617915
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  • 5
    Electronic Resource
    Electronic Resource
    Cultivation of arterial endothelial cells from human umbilical cord (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 1144-1146 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We have developed a simple method for the isolation of endothelial cells from human umbilical artery. The method provides a sufficient number of cells to be of experimental value. The presence of factor VIII antigen specific for endothelium has been demonstrated by immunofluorescence as well as by the peroxidase-antiperoxidase immune complex method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01943152
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  • 6
    Electronic Resource
    Electronic Resource
    Spontaneous and field-induced magnetic phase transitions in the intermetallic compounds (Gd1−x Y x )Mn2Ge2 (1999)
    Springer
    Journal of experimental and theoretical physics 89 (1999), S. 723-733 
    Details
    ISSN: 1090-6509
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic properties of the intermetallic compounds Gd1−x YxMn2Ge2 (0≤x≤0.5) (tetragonal crystal structure of the type ThCr2Ge2) have been measured in fields up to 40 T in the temperature range 4.2–120 K on free powders (whose particles are free to rotate in a magnetic field), fixed powders, and polycrystalline bulk samples. The temperature dependence of the crystal structure parameters of some of these intermetallic compounds was determined from x-ray diffraction measurements. It was found that the temperatures of magnetic disordering of the gadolinium magnetic subsystem and the transition of the manganese subsystem from the ferromagnetic to the antiferromagnetic state decrease as the gadolinium content is decreased, so that in compositions with x〈0.3 this transition is a first-order phase transition, and with further decrease of the gadolinium content it becomes second-order. In intermetallic compounds of this system with x=0.3 and 0.4 another spontaneous first-order transition is observed at lower temperatures. In a magnetic field the magnetization of all the investigated intermetallic compounds except for the composition x=0.5 undergo a metamagnetic transition. The T-x, H-x, and H-T magnetic phase diagrams are constructed. The experimental data are interpreted with allowance for the fact that according to the results of previous studies, the Mn-Mn exchange interaction is antiferromagnetic, and thus the examined intermetallic compounds are two-sublattice ferrimagnets with negative exchange interaction in one of the sublattices. Calculations performed within the framework of this model in the Yafet-Kittel approximation, which assumes that the sublattice with negative exchange can be divided into two sub-sublattices, permit a quantitative description of the experimental results in most cases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.559034
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  • 7
    Electronic Resource
    Electronic Resource
    Fluoride Analysis of Apatite Crystals with a Central Planar OCP Inclusion: Concerning the Role of F− Ions on Apatite/OCP/Apatite Structure Formation (1996)
    Springer
    Calcified tissue international 59 (1996), S. 377-384 
    Details
    ISSN: 1432-0827
    Keywords: Key words: Fluoride — Octacalcium phosphate — Apatite — Fluoridation — Enamel mineralization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. To study the roles of F− ions in the formation of apatite crystals embedding octacalcium phosphate (OCP) lamella in the center of apatite (Ap), a range of the Ap/OCP/Ap lamellar-mixed crystals were synthesized under various concentrations of fluoride ion (F−) from 0.1–1.0 ppm at pH 6.5 and 37°C. The products were analyzed for the F− incorporation, F− distribution, and the amount of OCP and Ap by chemical analysis, X-ray diffraction (XRD), electron probe microanalysis (EPMA), and nuclear magnetic resonance (NMR) techniques. The F− content and the amount of apatite in the crystalline product increased with an increase in the F− concentration in solution, whereas the amount of OCP and the yield of total product decreased. EPMA indicated that F− ions are distributed in the crystals almost homogeneously. The combined analysis suggested that a low-substituted fluoridated hydroxyapatite (FHAp) grew on a small amount of F−-containing OCP or on a surface-reaction layer of OCP, which has accumulated a small amount of F−. The roles of F− ions were hypothesized as the reduction of the growth rate and/or the critical thickness in the a*-axis direction of OCP, the enhancement of hydrolysis of OCP, and the activation of the growth of FHAp, resulting in thinner OCP lamella and thicker apatite lamella in the a*-axis direction with an increase in F− concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002239900143
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  • 8
    Electronic Resource
    Electronic Resource
    Immunohistochemical localization of cathepsins B, D and L in the rat osteoclast (1993)
    Springer
    Histochemistry and cell biology 99 (1993), S. 411-414 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Immunohistochemical localization of cathepsins B, D and L in the osteoclasts of rat alveolar and femoral bones was investigated by using the avidin-biotin-peroxidase complex method for semithin, 1-μm-thick cryosections. Extracellular immunoreactivity for cathepsins B and L was clearly demonstrated along the bone resorption lacunae; the intensity of the extracellular immunoreactivity of cathepsin L was stronger than that of cathepsin B. However, the intracellular immunoreactivity of both cathepsins was weak compared with that of cathepsin D. The intracellular immunoreactivity of cathespin D in the osteoclasts was clearly observed in the granules and/or vacuoles, but extracellular cathepsin D immunoreactivity was either negligible or not detected along the resorption lacunae. In the adjacent sections stained with anti-cathepsin L or D, extensive extracellular deposition of cathepsin L was found along the bone resorption lacunae, with or without osteoclasts, although the intracellular reactivity of cathepsin L was weak. This is the first morphological study in which cathepsins B and L have been demonstrated to be produced in the osteoclasts and extensively secreted into resorption lacunae, and in which cathepsin D was found to be present in the cells but scantily secreted into the lacunae. These findings suggest that cathepsins B and L directly and effectively participate in the degradation of the bone matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00717054
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  • 9
    Electronic Resource
    Electronic Resource
    An experimental study of non-equilibrium vapour condensation in a shock-tube (1989)
    Springer
    Experiments in fluids 7 (1989), S. 513-520 
    Details
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Filmwise non-equilibrium condensation of methanol vapour is investigated on a shock-tube endwall behind a reflected shock wave. The theoretical prediction of a transition phenomenon during the growth of a liquid film is experimentally demonstrated: the film grows approximately in proportion to the time at the early stages after the reflection of the shock wave and, after a transition period, it grows in proportion to the square root of the time. The condensation parameter of the vapour is obtained from the conformity between experiment and theory. It is found that the condensation parameter of the methanol vapour is of the magnitude of one tenth of the value for the complete capture of the molecules on the liquid surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00187402
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  • 10
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of cathepsin D in the rat osteoclast (1992)
    Springer
    Histochemistry and cell biology 97 (1992), S. 13-18 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We performed immunocytochemical localization of cathepsin D in osteoclasts of the proximal growth plate of the rat femurs using both the avidin-biotin-peroxidase complex method for cryo-semi-thin (1 μm) sections and the colloidal gold-labeled IgG method for K4M ultra-thin sections. At the light microscopic level, cathepsin D immunoreactivity in the osteoclasts appeared at the vesicles, granules, and/or small vacuoles. They were distributed throughout the cytoplasm of each cell and were relatively numerous close to the bone surface. This antigen could not be detected at the eroded bone surface. As for other cells, immunoreactivity was seen only in the lysosomes of osteoblast-like cells. Immunoreactivity in the osteoclasts was stronger and greater in the density and number than in osteoblast-like cells. At the electron microscopic level, osteoclasts with well-developed ruffled border possessed numerous cathepsin D-containing lysosomes, vacuoles, and coated vesicle-like structures. Cathepsin D-containing lysosomes fused with cathepsinnegative vacuoles and formed large secondary lysosomes. Osteoclasts with poorly developed ruffled border possessed fewer cathepsin D-containing lysosomes than those with well-developed ruffled border. No immunogold particles were seen in vacuole-like channel expansions of the ruffled borders, between the channels of the ruffled borders, or on the eroded bone surface. These findings demonstrate that osteoclasts contain a large amount of cathepsin D. They suggest that cathepsin D is necessary for osteoclastic bone resorption, that it plays an indirect rather than direct role.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00271276
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