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  • Springer  (42)
  • American Institute of Physics  (26)
  • 1980-1984  (51)
  • 1970-1974  (17)
  • 1960-1964
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  • 1
    Electronic Resource
    Electronic Resource
    Interpretations on chloroplast reproduction derived from correlations between cells and chloroplasts (1971)
    Springer
    Planta 97 (1971), S. 1-15 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The size ranges of chloroplasts in living mesophyll cells of Spinacia oleracea, Allium cepa, Beta vulgaris (Swiss chard and red beet) and Nicotiana glutinosa are extremely wide, e.g., ranging from about 6 µ2 to 103 µ2 in face area for spinach. Moreover, the size distributions are positively skewed. We interpret the size range and skewed size distributions primarily to reflect an enormous growth of the bulk of the chloroplasts from small, equal-sized chloroplasts produced by fission of a small sub-population of constricted mature chloroplasts. While actual fission has never been observed, a slow division rate of the constricted chloroplasts in N. glutinosa can account for the increase in chloroplast numbers per cell during leaf development and for the presence of small, non-constricted chloroplasts after the small chloroplasts which developed during the initial meristem activity have enlarged. Chloroplast numbers and total amount of chloroplast material per cell face were positively correlated with mesophyll-cell face size. However, the fraction of the cell face occupied with chloroplasts was essentially constant and independent of cell size and cell age while being markedly different for different species of plants. There appear to be some family characteristics in that closely related species have similar size-distributions and ranges of chloroplast sizes. The observations are discussed with respect to the ontogeny of chloroplasts in higher plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00388401
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  • 2
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    Interpretations on chloroplast reproduction derived from correlations between cells and chloroplasts (1971)
    Springer
    Details
    Publication Date: 1971-01-01
    Print ISSN: 0032-0935
    Electronic ISSN: 1432-2048
    Topics: Biology
    Published by Springer
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Erratum (1982)
    Springer
    Polymer bulletin 8 (1982), S. 385-385 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00264930
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  • 4
    Electronic Resource
    Electronic Resource
    The characteristics of cobalt or copper salt-coordinated poly(4-vinylpyridine-co-2,4-diamino-6-vinyl-s-triazine) membrane for reverse osmosis (1981)
    Springer
    Polymer bulletin 6 (1981), S. 169-174 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Poly(4-vinylpyridine-co-2,4-diamino-6-vinyl-s-triazine) membranes in which a part of pyridine rings was coordinated with cobalt or copper salt, considerably enhanced salt rejection without appreciable reduction of water permeability. This is attributed to the change in the membrane structure into a polar character. The heat treatment of the uncharged membrane in the salt solution formed the same structure on the surface, but was not effective for improvement of salt rejection, only increasing the membrane strength to a small extent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00956284
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  • 5
    Electronic Resource
    Electronic Resource
    The mode of action of insulin upon the electrical activity of mammalian retinas in vitro (1971)
    Springer
    Cellular and molecular life sciences 27 (1971), S. 395-396 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die Wirkung des Insulins auf das Elektroretinogramm der in vitro überlebenden Kaninchennetzhaut ergibt eine Vermehrung der Zahl und Amplitude derb-Wellen, ein Effekt, welcher von der direkten Wirkung des Insulins auf die Netzhautzellen abhängig ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02137269
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  • 6
    Electronic Resource
    Electronic Resource
    Determination of velocity distribution of metallic atoms in plasma devices with a rapid-frequency-scan dye laser (1984)
    Springer
    Applied physics 33 (1984), S. 171-177 
    Details
    ISSN: 1432-0649
    Keywords: 42.55m ; 52.70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A rapid-frequency-scan dye laser was developed for the measurement of the velocity-distribution functions of impurity atoms sputtered due to the high-temperature plasma-surface interaction. In order to confirm the effectiveness of this rapid-scan technique, measurements of the Doppler profiles of Fe atoms sputtered by Ar ion-beam bombardment with energy 3 keV were performed. A scanning range of more than 40 pm at λ ≈300 nm was obtained with a spectral bandwidth of 1.5 ∼2 pm and good linearity. Doppler profiles were determined in various scattering conditions, and excellent performance of this technique was demonstrated. The distortion error caused by line saturation was analytically discussed, and it is shown that the effect of this error is not so serious (less than 10%) even for highly saturated excitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688525
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  • 7
    Electronic Resource
    Electronic Resource
    Gas chromatographic determination of estrone, estradiol and estriol in non-pregnancy plasma (1970)
    Springer
    Microchimica acta 58 (1970), S. 491-503 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine gaschromatographische Methode zur Bestimmung von Östron, Östradiol und Östriol im normalen weiblichen Plasma wurde beschrieben. Die Reinigung erfolgte durch Dünnschichtchromatographie der freien Verbindungen und ihrer Acetate. Die quantitative Bestimmung wurde gaschromatographisch mit Hilfe eines Elektroneneinfangdetektors an Hand der Östrogenheptafluorobutyrate bewerkstelligt. Versuche zur Bewertung dieser Methode sowie Beispiele für ihre Anwendung wurden beschrieben.
    Notes: Summary A gas Chromatographic method for the determination of estrone, estradiol and estriol in plasma of normal females is described. Purification is done by means of TLC of the free compounds and the acetates and quantitation is achieved by electron capture-gas chromatography of the estrogen heptafluorobutyrates. Experiments on the validation of the method are described along with some examples of its application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01224152
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  • 8
    Electronic Resource
    Electronic Resource
    Nankai Trough: A hot trench? (1984)
    Springer
    Marine geophysical researches 6 (1984), S. 187-203 
    Details
    ISSN: 1573-0581
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Heat flow estimated from the gas hydrate layers on the landward slope of the Nankai Trough reveals that heat flow increases downslope toward the trench floor. This data plus six new heat flow values obtained by a conventional probe and two values available from DSDP drill holes give a fairly detailed heat flow distribution in the Nankai Trough area, when combined with the already existing data set. There appears to be a zonal pattern parallel to the trough axis, with a high heat flow zone on the floor of the trough that is quite anomalous for a subduction zone. It might be explained as a result of subduction of the hot portion of the Philippine Sea plate, i.e. the Shikoku Basin, and/or of more local effects such as heating due to intrusion of hot water from subducted sediments to shallow depth beneath the trough floor. Surface heat flow patterns landward of the trough were calculated for a simple thermal model of subduction. Perfect reproduction of the observed zonal pattern is difficult to achieve by the simple model, suggesting the necessity for further heat flow and other observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00285959
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  • 9
    Electronic Resource
    Electronic Resource
    Formation of amino acids from reactor-irradiated ammonium acetate (1982)
    Springer
    Origins of life and evolution of the biospheres 12 (1982), S. 339-345 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Ammonium acetate in various conditions was irradiated in a reactor to examine the contributions of both the reactor radiations and recoiled14C nucleis to form the biologically interesting molecules. Present investigations demonstrated that several amino acids, glycine, alanine, β-alanine and GABA, and may-be aspartic acid, serine and valine by prolonged irradiation, were formed in the aqueous solutions of ammonium acetate.14C-radioactivities were also found distributed in these amino acids. However, no special relationship between14C-radioactivity and these amino acids formed was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00927065
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  • 10
    Electronic Resource
    Electronic Resource
    Distribution of cadmium and zinc in tissues and organs, and their age-Related changes in striped dolphins,Stenella coeruleoalba (1983)
    Springer
    Archives of environmental contamination and toxicology 12 (1983), S. 543-550 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Cadmium and zinc concentrations were determined in the tissues and organs, including the fetus, of striped dolphins. The kidney showed the highest cadmium concentration and the hepatic cadmium concentration was also relatively high. A similar distribution pattern among soft tissues was also observed with zinc, where its concentration varied less than that of cadmium. A significant positive correlation between zinc and cadmium was found in both the kidney and the liver; the increase of zinc concentration with cadmium was more marked in the liver (Zn:Cd 3∶1 on molar basis) than kidney (Zn:Cd 1∶1). Negligible cadmium concentration in the fetus suggested that cadmium is not transferred to the fetus via the placenta from the mother. Organ-specific age trends of cadmium and zinc concentrations were presented in detail for muscle, liver, kidney, pancreas, brain, and blood. Both metals showed rapid change during the periods of the fetus and weaning.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01056550
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