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  • 1
    Electronic Resource
    Electronic Resource
    Charge transfer to helium ions from metastable helium
    Amsterdam : Elsevier
    Chemical Physics Letters 96 (1983), S. 379-382 
    Details
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-2614(83)80694-0
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  • 2
    Electronic Resource
    Electronic Resource
    Raman scattering studies on silver nanoclusters in a silica matrix formed by ion-beam mixing (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 4975-4979 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The formation and growth of nanoscale silver clusters in silica matrices are studied by means of optical absorption and Raman scattering spectroscopy. The metallic silver layer of the Ag/SiO2 couple was irradiated by argon ions for ion-beam mixing of silver with the silica matrix. Postannealing of the embedded Ag atoms in silica matrices results in the growth of Ag nanoclusters. The quadrupolar surface acoustic vibrational mode of the Ag nanoclusters has been observed in low-frequency Raman scattering experiments. The average size of these Ag nanoclusters is estimated from the quadrupolar mode frequency. Systematic growth of Ag nanoclusters embedded in silica matrices is observed with the increase of postannealing temperature. We have estimated the activation energy for the diffusion of Ag atoms in irradiated a-SiO2 from the coarsening of these embedded Ag atoms. Development of a peak at about 3 eV in the optical absorption spectra for the samples postannealed at higher temperatures corroborates further the growth of Ag nanoclusters in the silica matrices. New Raman modes at 1368 and 1573 cm−1 are observed in Ag embedded silica samples and the possible origin of these modes is discussed. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1290739
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  • 3
    Electronic Resource
    Electronic Resource
    The backscattered Lyman-alpha glow emission as a signature of the termination shock
    Amsterdam : Elsevier
    Advances in Space Research 13 (1993), S. 173-178 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(93)90406-2
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  • 4
    Electronic Resource
    Electronic Resource
    Vacuum ultraviolet detection of the VLISM-heliosphere interaction
    Amsterdam : Elsevier
    Advances in Space Research 12 (1992), S. 390-394 
    Details
    ISSN: 0273-1177
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0273-1177(92)90414-S
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  • 5
    Electronic Resource
    Electronic Resource
    Trend of regional metamorphism: an example from “Delhi System” of rocks occurring around Bairawas, North-Eastern Rajasthan, India (1972)
    Springer
    International journal of earth sciences 61 (1972), S. 270-281 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract Metamorphic pelitic assemblages, containing andalusite, garnet and staurolite, occur in the pre-Cambrian “Delhi System” of rocks in North-Eastern Rajasthan, India. Some of these assemblages have been studied petrographically and chemically in a selected area around Bairawas. It is suggested that metamorphism has been achieved in the area under conditions of relatively low pressure and high temperature. The assemblages do not strictly correspond to any known trend of regional metamorphism and can be best described as a type intermediate between “Barrovian”- and “Abukuma”-types. The possible paragenetic history of the mineral assemblages and the trend of metamorphism have been discussed.
    Abstract: Résumé Dans le «Delhi System» d'âge pré-Cambrien situé au Nord-Est du Rajasthan (Inde) se trouve un assemblage métamorphique et pelitique contenant de l'andalousite, du grenat et de la staurotide. Une partie de cet assemblage a été étudié au point de vue pétrographique et chimique dans la région de Bairawas. L'auteur est d'avis que le métamorphisme s'est achevé dans la région sous des conditions relatives de haute température et de basse pression. Cet assemblage ne correspond à aucun métamorphisme régional connu, et on peut l'identifier comme intermédiare entre les types «Barrovian» et « Abukuma ». L'auteur i discuté la direction du métamorphisme ainsi que l'histoire paragénétique probable des minéraux de cet assemblage.
    Notes: Zusammenfassung Metamorphe pelitische Serien, die Andalusit, Granat und Staurolith enthalten, kommen im präkambrischen „Delhi-System“ im nordöstlichen Rajasthan vor. Einige dieser Serien eines ausgewählten Gebietes bei Bairawas wurden petrographisch und chemisch untersucht. Es ist anzunehmen, daß Metamorphose in dem Gebiet unter relativ niedrigen Druck- und hohen Temperaturbedingungen zustande gekommen ist. Die Kriterien entsprechen keinem eindeutigen Trend der regionalen Metamorphose, sie kann am besten als ein Typ beschrieben werden, der zwischen „Barrovian“ und „Abukuma“ einzuordnen ist. Die mögliche paragenetische Geschichte der Mineralassoziation und der Trend der Metamorphose werden besprochen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01836142
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  • 6
    Electronic Resource
    Electronic Resource
    Longitudinal age changes in a fishermen population of West Bengal (1990)
    Springer
    International journal of anthropology 5 (1990), S. 1-10 
    Details
    ISSN: 1824-3096
    Keywords: ageing ; longitudinal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The longitudinal anthropological age changes in a sample of coastal fishermen in West Bengal are discussed. The results show that some traits follow the trends observed in ageing of Western populations, for instance nasal length and breadth continue to increase throughout life in both sexes. Stature follows also the trend generally observed: a decrease occurs indeed from 35 years of age in both sexes, the decline is becoming higher with increasing age. The typical ecological conditions of our population influence the rate of change in other traits, such as weight and biacromial diameter. Weight is known to be influenced by the nutritional status and the way of life. It explains that in our study of males an early increase of weight and biacromial diameter is observed first and a decrease afterwards. In females, however, a decrease is observed already from 35 years of age. This kind of analysis was only possible with the help of longitudinal data and in a well defined population: only longitudinal data is free from the effect of secular changes and of selective death.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442366
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  • 7
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of osmium using o-hydroxythiobenzhydrazide (1977)
    Springer
    Microchimica acta 67 (1977), S. 173-179 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Osmium(VI) bildet mit o-Hydroxythiobenzhydrazid zwischen pH 5,4 und 6,4 eine violette Komplexverbindung. Diese läßt sich mit Chloroform gut extrahieren. Die violette Lösung eignet sich für die photometrische Bestimmung des Osmiums, zeigt maximale Absorption bei 540–550 nm und entspricht zwischen 1,44 und 14,40μg Os/ml dem Beerschen Gesetz. Mikrogrammengen Osmium können so neben erheblichen Mengen verschiedener anderer Begleitionen nach deren Maskierung mit ÄDTA bestimmt werden. Gold jedoch muß vorher entfernt werden. Der molare Extinktionskoeffizient beträgt 1,18×104 l · Mol−1 · cm−1, die Empfindlichkeit nach Sandell 0,016μg · cm−2.
    Notes: Summary Osmium(VI) forms a violet complex witho-hydroxythiobenzhydrazide in the pH range 5.4–6.4. The complex is readily extractable in chloroform to give a violet solution which can be employed for the photometry of osmium. The extract shows maximal absorption at 540–550 nm and obeys Beer's law over the concentration range 1.44–14.40μg Os ml−1.μg amounts of osmium can be determined witho-hydroxythiobenzhydrazide in the presence of considerable amounts of diverse ions commonly associated with the metal using EDTA as the masking agent. However, gold should be removed prior to the determination of osmium with the reagent. The molar extinction coefficient of the complex and the Sandell sensitivity are 1.18×104 l mole−1 cm−1 and 0.016μg cm−2 respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196543
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  • 8
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of ruthenium, rhenium, osmium and platinum with organic thiohydrazides (1978)
    Springer
    Microchimica acta 70 (1978), S. 343-357 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Alpha-Naphthalinthiocarboxhydrazid, 2-Pyrrolthiocarboxhydrazid, 2-Furanthiocarboxhydrazid und 2-Thiophenthiocarboxhydrazid wurden als Reagenzien für die spektrophotometrische Bestimmung von Ruthenium, Rhenium, Osmium und Platin in Gegenwart beträchtlicher Überschüsse verschiedener, damit üblicherweise vergesellschafteter Metallionen verwendet. Die dabei gebildeten gefärbten Komplexverbindungen sind mehr als 12 Stunden beständig und folgen dem Beerschen Gesetz bei der Wellenlänge maximaler Extinktion. Die molaren Absorptionen liegen in der Größenordnung 104.
    Notes: Summary Four organic thiohydrazides, e. g.,α-naphthalenethiocarboxhydrazide, 2-pyrrolethiocarboxhydrazide, 2-furanthiocarboxhydrazide and 2-thiophenethiocarboxhydrazide are employed as reagents for the spectrophotometric determination of ruthenium, rhenium, osmium and platinum in the presence of considerable excess of diverse metal ions commonly associated with them. The coloured complexes, formed by the reagents with the metals, are stable for more than 12 hr and follow Beer's law at the wavelength of maximum absorbance. The molar absorptivities are in the 104 range for the metal complexes studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201628
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  • 9
    Electronic Resource
    Electronic Resource
    Spectrophotometric determination of osmium with o-arsanilic acid (1977)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 286 (1977), S. 251-251 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Osmium mit o-Arsanilsäure ; Spektralphotometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01155605
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  • 10
    Electronic Resource
    Electronic Resource
    Extraction and spectrophotometric determination of platinum(IV) with thiobenzhydrazide (1976)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 281 (1976), S. 143-143 
    Details
    ISSN: 1618-2650
    Keywords: Best. von Platin(IV) mit Thiobenzhydrazid ; Spektralphotometrie ; Extraktion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624703
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