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  • 1965-1969  (6)
  • 1955-1959  (4)
  • 1
    Electronic Resource
    Electronic Resource
    The Four Elastic Constants of Diamond (1958)
    [s.l.] : Nature Publishing Group
    Nature 182 (1958), S. 518-520 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To achieve this, three values of the frequency shifts must be assumed. For convenience, the shifts of the longitudinal component arising from the elastic waves moving approximately along the direction [144], which is inclined at about 10 to [011], and the longitudinal and transverse components of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/182518b0
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  • 2
    Electronic Resource
    Electronic Resource
    Stress Optical Coefficients of Different Specimens of Vitreous Silica (1958)
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 692-693 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The 'OH' quality was irradiated by neutrons in the APSARA reactor (Trombay) by the courtesy of the Indian Atomic Energy Commission. The Integrated neutron flux hours were 47 X 10U neutrons/cm.2. The specimen was coloured violet-brown after irradiation. The variation of C with wave-length for the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/181692a0
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  • 3
    Electronic Resource
    Electronic Resource
    Dispersion of the Photoelastic Constants of Fused Silica (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 540-541 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. The stress optical coefficient of vitreous silica The value of q12 increases from 2-35 x 10~13 at 2300 A. to 2-49 X 10"18 at 5500 A., and that of qix increases from 0-24 X 10"18 at 2300 A. to + 0-11 10~13 at 5500 A. (q12 and qlt are given in c.g.s. units). The variation of the stress ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179540b0
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  • 4
    Electronic Resource
    Electronic Resource
    Raman spectra of alkali halides (1965)
    Springer
    The European physical journal 183 (1965), S. 130-139 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this article, we present a comparative study of the Raman spectra of alkali halides in relation to the lattice dynamics ofBorn andRaman. It is shown that the experimentally observed limit of the second-order spectra in almost all the cases can be explained well by the Lyddane-Sachs-Teller relation. It is also seen, while, an explanation of the second-order Raman spectrum of a crystal of diamond or zinc blende structure requires the frequencies from the critical points,W, Γ, X andL inBorn's analysis, the frequencies fromΓ, X andL alone are sufficient and necessary for an interpretation of the same onRaman's model. Some similarities in the determination of the long wave properties of crystals like elastic constants and limiting frequencies of the lattice vibrations in the symmetry directions in both the models are pointed out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01380789
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  • 5
    Electronic Resource
    Electronic Resource
    Adiabatic Piezo-Optic Coefficient of Heavy Water (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 497-498 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The adiabatic piezo-optic coefficient was determined by an interferometric technique1 employing a Rayleigh-Zeiss refractometer, and adequate precautions were taken to eliminate errors due to expansion of the cell, etc. The measured value of the adiabatic piezo-optic coefficient for sodium D line ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180497a0
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of chronic administration of acetylsalicylic acid on lipid metabolism in growing rats (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 899-900 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'administration prolongée d'acide acétylsalicylique à de jeunes rats (0.3 mg/g) a provoqué des augmentations temporaires d'acide palmitique dans les phospholipides du cerveau et du foie. Des augmentations temporaires d'acide stéarique et des diminutions d'acide arachidonique ont été aussi observées dans les phospholipides du foie. Les changements observés dans les phospholipides du foie permettent de supposer que l'acide acétylsalicylique affecte peut-être les enzymes désaturisant les acides gras.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138638
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  • 7
    Electronic Resource
    Electronic Resource
    The pachytene chromosomes of Ipomoea crassicaulis (1969)
    Springer
    Theoretical and applied genetics 39 (1969), S. 274-279 
    Details
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Bei der diploiden amerikanischen Ipomoea crassicaulis (Bth) B.L. Robinson (2 n=30) wird die Morphologie der Pachytänchromosomen und die Mikrosporogenese untersucht. Das Idiogramm der Pachytänchromosomen wird aufgestellt und unter Ausnutzung der großen Präzisionsmöglichkeit der Pachytänanalyse werden die charakteristischen Daten des haploiden Chromosomensatzes erarbeitet und alle Chromosomen identifiziert. Die Meiose verläuft normal und liefert zu mehr als 95% guten Pollen. Die Notwendigkeit umfassender ähnlicher Untersuchungen bei anderen taxonomischen Einheiten aus dieser wirtschaftlich wichtigen Gattung zwecks Klärung phylogenetischer Beziehungen wird nachdrücklich hervorgehoben.
    Notes: Summary The detailed morphology of the pachytene chromosomes and microsporogenesis have been studied in a diploid (2 n=30) American species, Ipomoea crassicaulis (Bth) B. L. Robinson. Idiogram of the pachytene chromosomes is presented and taking advantage of the extreme precision that pachytene analysis can lend, karyological characteristics of the haploid complement have been worked out in detail and individual chromosomes are identified. The course of meiosis was normal and over ninety five percent of pollen were found stainable. The urgent need for extending similar studies to other taxa in this economically important genus for unravelling phyletic relationships has been stressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275009
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on pachytene and somatic chromosomes ofPhaseolus mungo L. (1966)
    Springer
    Genetica 37 (1966), S. 581-587 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The pachytene and somatic chromosomes ofPhaseolus mungo L. (2n=22), were identified and classified on the basis of their relative length, arm ratio, chromomere pattern and nucleolar association. A comparison of the karyotypes during the somatic and pachytene stages, revealed that some chromosomes are of different relative lengths during the two phases. Thus, the two nucleolar organizer chromosomes are the 2nd and 3rd longest at somatic metaphase, but only 7th and 9th longest during pachytene. The pachytene chromosomes belong to the differentiated group.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01547155
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  • 9
    Electronic Resource
    Electronic Resource
    Cytological studies of the hybrid,Phaseolus aureus×P. mungo (1966)
    Springer
    Genetica 37 (1966), S. 588-600 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The two closely related species,Phaseolus aureus andP. mungo were crossed successfully using the former as the female parent. A detailed cytological study of the hybrid, which showed morphological characters of both the parents, was carried out. At the pachytene stage, the pairing behaviour of 9 out of the 11 chromosomes belonging to the haploid complement of the two parents was investigated. The remaining two chromosomes are represented by morphologically distinct bivalents. The two species differ by a translocation, a deletion and a duplication. A consideration of the data from comparative morphology, geographical distribution, protein characters and genetical studies in the F2 and back cross generations, indicates a very close relationship between the two diploid species. Chromosome differentiation seems to constitute the major difference. The karyological evidences seem to indicate thatmungo is derived fromaureus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01547156
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  • 10
    Electronic Resource
    Electronic Resource
    Amino acid requirements for growth of the rabbit blastocyst in vitro (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 70 (1967), S. 155-160 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Ten amino acids, namely, arginine, histidine, lysine, tryptophane, methionine, phenylalanine, leucine, valine, threonine and serine were indispensable for growth of rabbit blastocysts in vitro; others were nonessential. Of all the essential amino acids, arginine and lysine were required in relatively high concentrations, 10-2 M and 10-3 M, respectively, for optimum growth. Complete omission of the non-essential amino acids from the medium markedly reduced blastocyst growth. Interaction between serine and glycine demonstrated a partial sparing action on serine by glycine, similar to that observed between methionine and cysteine. The amino acid composition of a culture medium capable of providing continuous and consistent growth of rabbit blastocysts in vitro is described.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040700204
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