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  • Chemistry  (260)
  • Immunofluorescence  (4)
  • Seismology  (3)
  • Ultrastructure  (3)
  • Magnetism
  • 2000-2004  (5)
  • 1975-1979  (52)
  • 1960-1964  (124)
  • 1950-1954  (89)
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  • 1
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    Temperature and melting of a ridge-centred plume with application to Iceland. Part II: Predictions for electromagnetic and seismic observables (2004)
    In:  Geophys. J. Int., Warszawa, 1-3, vol. 159, no. 3, pp. 1097-1111, pp. L07307, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Modelling ; GeodesyY ; ConvolutionE ; Electromagnetic methods/phenomena ; Seismology ; hotspots, ; magnetotellurics, ; melt ; mid-ocean ; ridges, ; seismic ; velocities ; GJI
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Seismology on a small scale: acoustic emission measurements in rock mechanics (2004)
    In:  Mittlg. d. Dt. Geophys. Ges., Hannover, Polish Geothermal Association, vol. 336, no. I (Sonderband zum Symposium in Memoriam of Prof. Gerhard Müller), pp. 72-78, pp. 1051, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Seismology ; Acoustic emission ; Rock mechanics ; Laboratory measurements ; Eisenblaetter ; Eisenblatter ; Mueller ; Muller
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Ocean bottom seismometers deployed in Tyrrhenian Sea (2002)
    In:  Eos, Trans., Am. Geophys. Un., Warszawa, Pergamon, vol. 83, no. 29, pp. 309, 314 & 315, pp. L19306, (ISBN: 0-12-018847-3)
    Details
    Publication Date: 2002
    Keywords: Seismology ; Instruments ; OBS ; Hamburg ; GeomagneticsR ; Italy ; Fluh ; Flüh
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
    Electronic Resource
    Electronic Resource
    Qualitative and quantitative immunofluorescence studies of chloroplast ferredoxin (1977)
    Springer
    Planta 137 (1977), S. 279-286 
    Details
    ISSN: 1432-2048
    Keywords: Chloroplast ; Ferredoxin ; Immunofluorescence ; Nicotiana
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Antibodies were raised in rabbits against 2Fe−2S ferredoxin from N. tabacum L. The antibodies showed partial cross-reactivity in the double diffusion test with ferredoxins from Spinacia oleracea L., Petunia inflata Fries., P. axillaris Lam., Phaseolus vulgaris L., Chlamydomonas remhardii Dang. A complete cross-reaction was observed with ferredoxins from five other Nicotiana species, thus with this test it was impossible to discriminate between these ferredoxins. Therefore the following test was performed. Heterologous ferredoxin (i.e., ferredoxin other than from N. tabacum) was coupled covalently to Sepharose beads. Rabbit anti-N. tabacum-serum was then pre-incubated with this ferredoxin which resulted in complete abolition of cross-reactivity with free heterologous ferredoxin. However, the serum retained antibody activity against specific antigenic determinants of N. tabacum ferredoxin. When this serum was tested against ferredoxin purified from the hybrid: N. tabacum (♀)xN. glutinosa (♂) it gave a positive reaction. The relative content of maternal N. tabacum ferredoxin in the hybrid was estimated by using a fluorescent derivative of this specific antibody and estimating the cross-reactivity compared with that of artificial mixtures of pure N. tabacum and N. glutinosa ferredoxins. The hybrid contained 50% of maternal ferredoxin. This technique was also applied to ferredoxins of other species of Nicotiana and to the ferredoxin from the hybrid N. clevelandii (♀)xN. glutinosa (♂). We conclude that it provides a good test system for the study of the expression of chloroplast ferredoxin in Nicotiana hybrids in general.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388163
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  • 5
    Electronic Resource
    Electronic Resource
    The relation between cell proliferation, differentiation and ultrastructural development in rat intestinal epithelium (1976)
    Springer
    Cell & tissue research 174 (1976), S. 183-199 
    Details
    ISSN: 1432-0878
    Keywords: Rat small intestine ; Differentiation ; Ultrastructure ; Morphometry ; X-irradation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The ultrastructural development of the principal cells in rat small intestine was studied by morphometric analyses in relation to the exact cell position along crypt and villus. From the bottom to the tip of the crypt, a gradual increase occurred in absolute size of the total cell, the cytoplasm, the terminal web and of nearly all cell organelles. Also, the relative size of the cytoplasm, mitochondria, microvilli and endoplasmic reticulum increased during crypt cell differentiation. No sudden changes in ultrastructure were observed in the so-called “critical decision zone”, normally located halfway up the crypt where the proliferative activity ceases. At the crypt-villous junction a 1.4–3 fold increase in cell size, cytoplasm, terminal web and of most organelles was noted. Expansion of the proliferative cell compartment over the total length of the crypt as occurs during recovery after a low X-irradiation dose (72 h after 400 R) does not affect the normal development of cellular ultrastructure. These findings are discussed in relation to biochemical and cell kinetic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00222158
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  • 6
    Electronic Resource
    Electronic Resource
    Neurosecretion in the basommatophoran snail Bulinus truncatus (Gastropoda, Pulmonata) (1977)
    Springer
    Cell & tissue research 176 (1977), S. 57-67 
    Details
    ISSN: 1432-0878
    Keywords: Neurosecretion ; Alcian blue ; Alcian yellow staining ; Ultrastructure ; Bulinus truncatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The neurosecretory system of the freshwater snail Bulinus truncatus was investigated. With the Alcian blue-Alcian yellow (AB/AY) staining method at least 10 different types of neurosecretory cells (NSC) were distinguished in the ganglia of the central nervous system. The differences in staining properties of the NSC — with AB/AY the cells take on different shades of green and yellow — are borne out at the ultrastructural level: the NSC types contain different types of neurosecretory elementary granules. The neurosecretory system of B. truncatus is compared to that of Lymnaea stagnalis, the species which has received the most attention among the pulmonates. It appears from the comparison that the systems of both species show many similarities, although some differences are also apparent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00220344
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  • 7
    Electronic Resource
    Electronic Resource
    The gonadotropic cells in the pituitary of the black molly, Mollienisia latipinna, and other teleosts, identified by the immunofluorescence technique in normal and androgen-treated animals (1976)
    Springer
    Cell & tissue research 167 (1976), S. 211-219 
    Details
    ISSN: 1432-0878
    Keywords: Teleosts ; Pituitary ; GTH ; Immunofluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using anti-carp-gonadotropic-γ-globulin, the indirect immunofluorescence technique was applied to sections of the pituitary of 12 teleost species. From the investigated species, the Poeciliinae, and especially the black molly, showed a distinct localization of fluorescent cells in the mesoadenohypophysis. Strong fluorescence was observed in the ventralmost region, containing the presumed gonadotropic cells; weak fluorescence was observed in the dorsal region, in the presumed thyrotropic cells. The possibility of an unspecific reaction with TSH-cells in the latter region is discussed. Treatment of male black mollies for 38 days with methyltestosterone resulted in a loss of fluorescence in the ventral region of the meso-adenohypophysis, whereas there was no decrease of the fluorescence in the dorsal region. The results support the hypothesis that the ventral basophils in the mesoadenohypophysis produce gonadotropic hormone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224328
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  • 8
    Electronic Resource
    Electronic Resource
    Immunofluorescence studies on gonadotropin releasing hormone (GRH) in the fore-brain and the neurohypophysis of the green frog, Rana esculenta L. (1976)
    Springer
    Cell & tissue research 168 (1976), S. 325-333 
    Details
    ISSN: 1432-0878
    Keywords: Gonadotropin Releasing Hormone ; Fore-brain ; Rana esculenta ; Immunofluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Using antibodies against mammalian LH-RH, the double antibody immunofluorescence technique has been applied to serial cross sections of the brains of adult Rana esculenta. Immunoreactive material was found in perikarya of an unpaired nucleus in front of the preoptic recess. The axons of these perikarya also contain fluorescing material. They form a single bundle which passes under the preoptic recess, than splits into two tracts, one on either side of the optic chiasm. The two tracts reunite just before entering the median eminence. The axons end near the capillaries in the outer zone of the median eminence. The possibility of two separate centres for the stimulation of gonadotropic activity in the brains of anurans is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00215310
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  • 9
    Electronic Resource
    Electronic Resource
    The pit cell: Description of a new type of cell occurring in rat liver sinusoids and peripheral blood (1976)
    Springer
    Cell & tissue research 173 (1976), S. 423-435 
    Details
    ISSN: 1432-0878
    Keywords: Liver ; Rat ; Sinusoid ; Pit cell ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Pit cells — a new type of cell first described here and so named because they contain highly characteristic granules — are situated in the wall of rat liver sinusoids, and have hyaloplasmic pseudopodia intermingling with the microvilli of the parenchymal cells. The characteristic granules are mainly situated at one side of the nucleus, the other side showing organelle-free hyaloplasm. Pit cells are also found in portal tracts and in granuloma-like cellular aggregates. They also occur in rat peripheral blood, although there are morphological differences between cells in these two sites. Pit cells can be regarded as regular inhabitants of the sinusoidal wall, and therefore belong to the series of sinusoidal cells, i.e., the endothelial (Wisse, 1972), Kupffer (Widmann et al., 1972; Wisse and Daems, 1970; Wisse, 1974a,b), and fat-storing cells (Ito, 1973). Pit cells do not phagocytose and do not react to a great number of experimental conditions, to which endothelial and Kupffer cells do react (Wisse, 1972, 1974b). Mitosis has been observed in a pit cell. The function of pit cells remains obscure, but an endocrine function is suggested by the morphology of their highly characteristic granules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00224305
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of the base-pairing content of four specific tRNAs by infrared spectroscopy (1977)
    New York : Wiley-Blackwell
    Biopolymers 16 (1977), S. 1735-1745 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Infrared spectroscopy was used for the determination of the base-pairing content of four specific tRNAs in deuterium oxide solution. Infrared spectra were obtained in the 1750-1550 cm-1 region at various temperatures ranging from about 15 to 90°C. Melting curves were constructed by plotting the molar extinction coefficient at ν = 1657 cm-1 versus temperature. These transition curves enabled us to determine the ranges of temperature which correspond to the ordered (partially double-stranded) or randomly coiled structure of the tRNA. For a set of wavenumbers the extinction coefficients at these temperatures were used for the calculation of the base-pairing content. The procedure employed here is based on a method described earlier by Thomas [(1969) Biopolymers 7, 325-334]. For the conditions selected for this investigation (Mg2+-free D2O-buffer; 0.01M tris-DCl, 0.015M NaCl, pD 7.5) the results of this determination agree within the limits of errors with the number of base pairs predicted by the cloverleaf model.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1977.360160810
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