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  • Springer  (13)
  • American Institute of Physics  (1)
  • 1975-1979  (14)
  • 1978  (14)
  • 1
    Electronic Resource
    Electronic Resource
    Effect of borax on testis of Indian desert gerbil,Meriones hurriane Jerdon (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 1374-1375 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Borax was injected at a dose level of 250 mg/kg b. wt for 16 days (total dose 4 g/kg b.wt) s.c. to active adult male gerbils. Borax caused several degenerative changes in the testes of which giant cell formation, pyknosis and exfoliation are prominent. The increased activity of phosphatases was also noticed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01981483
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  • 2
    Electronic Resource
    Electronic Resource
    Actinomycin D inactivating enzymes fromActinoplanes missouriensis and several other members of theActinoplanaceae family (1978)
    Springer
    Applied microbiology and biotechnology 5 (1978), S. 165-170 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The enzymes for inactivating actinomycin D appear to be widely distributed amongst species belonging to the familyActinoplanaceae. Actinomycin D was completely or partially inactivated by cell-free extracts fromActinoplanes missouriensis, Streptosporangium viridogriseum, S. violaceocbromogenes, S. roseum, S. brasiliense, S. albidum, Spirillospora sp.,Sp. albida, Kitasatoa kauaiensis, Planobispora longispora, P. rosea, Dactylosporangium aurantiacum, andD. thailandense. No inactivation was obtained with extracts fromAmorphosphorangium auranticolor, Ampullariella lobata, Planomonospora parontospora, andP. venezuelensis. Actinomycin lactonase was partially purified by ultracentrifugation, ultrafiltration, and isoelectric focusing from noninduced cells ofActinoplanes missouriensis. The enzyme has a molecular weight of greater than 200,000 daltons and an isoelectric point of 4.3 to 4.4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00579335
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  • 3
    Electronic Resource
    Electronic Resource
    Semen electrolytes in normal and infertile subjects. II. Zinc (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 1476-1477 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Zinc levels in seminal plasma of normal subjects are compared with those of oligospermic, asthenospermic and azoospermic. A linear direct relationship seems to exist between zinc in seminal plasma and motility of spermatozoans. The possible implications of this are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01932363
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  • 4
    Electronic Resource
    Electronic Resource
    Heat capacity measurements by computer-interfaced DSC (1978)
    Springer
    Journal of thermal analysis and calorimetry 13 (1978), S. 71-84 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Un dispositif a été conçu à partir de composants commerciaux pour la mesure des chaleurs spécifiques et a été associé à un calculateur. Un analyseur calorimétrique différentiel à compensation de puissance, de type Perkin-Elmer DSC-2, constitue l'élément de base pour les mesures entre 100 et 1000 K. Le traitement des données s'effectue avec un calculateur du type Hewlett-Packard 9821 (mini-ordinateur). Celui-ci assure l'acquisition des données et leur conservation permanente sur télé-bande. Le programme a été conçu pour contrôler la mesure et le calcul final, la mise en tableaux, le tracé des courbes et leur ajustement. L'étalonnage s'effectue par comparaison avec l'acide benzoïque ou l'oxyde d'aluminium (saphir). A titre d'exemple, la chaleur spécifique du zinc a été mesurée afin d'évaluer l'exactitude. Celle-ci est meilleure que ± 0,5% c'est-à-dire qu'elle est 3 à 5 fois supérieure à celle d'un système similaire sans calculateur. Le dispositif sera surtout utilisé pour la détermination des chaleurs spécifiques des macromolécules linéaires.
    Abstract: Zusamenfassung Ein mit einem Komputer ausgestattetes Wärmekapazitäts-Mess-System wurde aus handelsüblichen Bestandteilen gebaut. Ein Differential-Scanning Kalorimeter vom Typ Perkin-Elmer DSC-2 bildet das Grundgerät für Messungen zwischen 100 und 1000 K. Ein Hewlett-Packard Kalkulator (Mini-Komputer) des Typs 9821 ist das Datenbehandlungssystem. Die Daten werden gesammelt und laufend am Tele-Band gespeichert. Das Programm eignet sich zur Steuerung der Messung und zur Endauswertung, Tabulierung, Berechnung von Zusammenhängen und Anpassung an Kurven. Geeicht wird mittels Vergleichen mit Benzoesäure oder Aluminiumoxid (Saphir). Die Wärmekapazitäten von Zink wurden als Beispiel und zur Bewertung der Genauigkeit gemessen. Die Genauigkeiten erwiesen sich besser als ± 5 %, also 3 bis 5-mal so gut wie bei einem ähnlichen System ohne Komputer. Das System wird hauptsächlich zur Messung der Wärmekapazitäten linearer Makromoleküle eingesetzt.
    Notes: Abstract A computer assisted heat capacity measuring system has been designed from commercial components. A differential scanning calorimeter of type Perkin-Elmer DSC-2 forms the basis for measurements from 100 to 1000 K. A Hewlett-Packard calculator (minicomputer) of type 9821 is the data handling system. The data are collected and permanently stored on teletape. The program has been written to govern measurement and final computation, tabulation, plotting, and curve fitting. Calibration is done by comparison with benzoic acid or aluminium oxide (sapphire). Zinc heat capacities have been measured as an example and for evaluation of accuracy. Accuracies of better than ± 0.5% have been achieved, an improvement of approximately a factor 3 to 5 over a similar system without computer assist. The system will be used mainly for heat capacities of linear macromolecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01909910
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  • 5
    Electronic Resource
    Electronic Resource
    Heat capacities of linear macromolecules (1978)
    Springer
    Journal of thermal analysis and calorimetry 13 (1978), S. 197-203 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On a mesuré la chaleur spécifique du sélénium liquide entre 500 et 700 K, à l'aide de trois analyseurs calorimétriques différentiels commerciaux (Du Pont, Mettler, Perkin-Elmer). La comparaison avec les données restreintes de la littérature, obtenues par calorimétrie adiabatique, a montré que les trois instruments donnent des résultats dont l'exactitude est meilleure que ± 3 %. Ainsi, les différences entre les instruments résident surtout dans la commodité de manipulation des échantillons et d'étalonnage. La chaleur spécifique ainsi mesurée tend à dimineur quand la température augmente, contrairement aux macromolécules synthétiques linéaires.
    Abstract: Zusammenfassung Die Wärmekapazität von flüssigem Selen wurde zwischen 500 und 700 K gemessen. Drei handelsübliche dynamische Differentialkalorimeter wurden zur Bewertung eingesetzt (du Pont, Mettler, Perkin-Elmer). Der Vergleich mit einigen Literaturangaben bezüglich adiabatischer Kalorimetrie zeigt für alle drei Instrumente eine höhere Genauigkeit als ± 3 %. Der Unterschied zwischen den Instrumenten besteht demnach hauptsächlich in der Leichtigkeit der Probenbehandlung und der Eichung. Die gemessene Wärmekapazität zeigt eine Abnahme mit steigender Temperatur, im Gegensatz zu synthetischen linearen Makromolekülen.
    Notes: Abstract The heat capacity of liquid selenium was measured from 500 K to 700 K. Three commercial dynamic differential calorimeters were used for the evaluation (du Pont, Mettler, Perkin-Elmer). Comparison with limited literature data by adiabatic calorimetry shows that all three instruments give data of better than ± 3 % accuracy. Differences among the instruments are thus mainly in the convenience of sample handling and calibration. The heat capacity measured shows a decreasing trend with increasing temperature, opposite to synthetic linear macromolecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01912291
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  • 6
    Electronic Resource
    Electronic Resource
    Diffusion and electrical conductivity studies in some heterophase glasses containing bismuth (1978)
    Springer
    Journal of materials science 13 (1978), S. 1438-1442 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Self-diffusion coefficients of sodium in the temperature range 300 to 375° C have been measured for glasses in the system Na2O-B2O3-Bi2O3-SiO2, by using a radioactive tracer technique. All these glasses have a two-phase structure. The d.c. resistivities of these glasses were also measured over the temperature range 30 to 375° C. The correlation factors,f, of all the samples have been calculated by using the diffusion coefficients and d.c. resistivity values for temperatures above 300° C. The anomalously largef values in the case of Bi2O3-containing glasses are thought to be due to a distribution of sodium ions in the dispersed as well as the continuous phases in these systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553196
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  • 7
    Electronic Resource
    Electronic Resource
    Cation-exchange studies of yttrium(III) and its separation from various other elements (1978)
    Springer
    Chromatographia 11 (1978), S. 536-537 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Systematic studies are presented on the cation-exchange behaviour of yttrium on Dowex 50W-X8. HCl, HNO3, H2SO4, NH4Cl, NH4NO3, (NH4)2SO4, CH3COONH4, NaCl, NaNO3, malonic acid, tartaric acid and EDTA were used as eluting agents. Y was separated from a large variety of elements by selective elution or selective adsorption. Thus it was possible to separate it from many common ions such as alkalis, alkaline earths, Bi, Hg, V, Cd, U, In, Co, Ga, Zn, Sc, Fe, Al, Ni, and Ce by selective elution. It was separated from Ti, Zr, Hf, and Sb by selective sorption in citrate media and from Cr, Tl, Pb, and Th by gradient elution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311078
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  • 8
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    Effect of borax on testis of Indian desert gerbil,Meriones hurriane Jerdon (1978)
    Springer
    Details
    Publication Date: 1978-10-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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  • 9
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    Semen electrolytes in normal and infertile subjects. II. Zinc (1978)
    Springer
    Details
    Publication Date: 1978-11-01
    Print ISSN: 0014-4754
    Topics: Biology , Medicine
    Published by Springer
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  • 10
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    Cation-exchange studies of yttrium(III) and its separation from various other elements (1978)
    Springer
    Details
    Publication Date: 1978-09-01
    Print ISSN: 0009-5893
    Electronic ISSN: 1612-1112
    Topics: Chemistry and Pharmacology
    Published by Springer
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