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  • Springer  (120)
  • 1990-1994
  • 1980-1984  (120)
  • 1970-1974
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  • 1982  (120)
  • 1
    Electronic Resource
    Electronic Resource
    Agricultural droughts and crop production in the Indian arid zone (1982)
    Springer
    Meteorology and atmospheric physics 31 (1982), S. 405-411 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Es werden landwirtschaftliche Dürren in der Periode von 1901 bis 1975 in fünf ausgewählten Gebieten der ariden Zone Indiens mit Verwendung vonAE/PE-Werten in verschiedenen Pflanzenentwicklungsphasen untersucht. Die Produktivität von Hülsenfrüchten und Hirse, das sind die stärker vom Regen abhängigen Früchte in dieser Region, wird für verschiedene landwirtschaftliche Dürregrade geschätzt.
    Notes: Summary Based on a rational approach, agricultural droughts were studied for the period 1901–75 for 5 selected regions in the Indian arid region using theAE/PE values during different phenophases. The productivity of pearlmillet and kharif pulses crops, the two major rainfed crops in this region, was assessed under different agricultural drought situations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263444
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  • 2
    Electronic Resource
    Electronic Resource
    Flow between torsionally oscillating disks rotating about different axes at different speeds (1982)
    Springer
    Zeitschrift für angewandte Mathematik und Physik 33 (1982), S. 358-369 
    Details
    ISSN: 1420-9039
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Physics
    Description / Table of Contents: Zusammenfassung In der vorliegenden Arbeit wird die Strömung einer zwischen zwei parallelen, unendlichen Scheiben begrenzten, inkompressiblen, viskosen Flüssigkeit untersucht; die zwei Scheiben führen Torsionsschwingungen gleicher Frequenz aus, drehen sich aber um verschiedene Achsen mit verschiedenen Geschwindigkeiten. Lösungen werden gegeben für die symmetrische und asymmetrische, erste harmonische Oberschwingung und die stationäre Strömung. Die interessanten Eigenschaften der symmetrischen und asymmetrischen Strömung werden diskutiert für die Fälle von kleinem und großem Womersley-Parameter bei verschiedenen Verhältnissen der Drehgeschwindigkeiten. Außerdem werden die Kräfte berechnet, die auf eine der Scheiben einwirken.
    Notes: Abstract The flow of an incompressible viscous fluid confined between two parallel infinite disks performing torsional oscillations with the same frequency, but rotating about different axes with different speeds has been studied. The solutions are presented for the symmetric and asymmetric first harmonic and steady streaming. The interesting features of the symmetric and asymmetric flow are discussed for the cases of small and large Womersley parameter at different ratios of the rotation speeds. The forces acting on one of the disks are also calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00944444
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  • 3
    Electronic Resource
    Electronic Resource
    Electrical conductivity of BaS phosphors (1982)
    Springer
    Journal of materials science 1 (1982), S. 17-18 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00724707
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  • 4
    Electronic Resource
    Electronic Resource
    Radioluminescence of BaS:Cu,Bi phosphors (1982)
    Springer
    Journal of materials science 1 (1982), S. 435-436 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00724864
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  • 5
    Electronic Resource
    Electronic Resource
    Determination of trace elements in rocks by optical emission spectroscopy: A new method of internal standardization (1982)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 311 (1982), S. 507-510 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary A method has been described for the determination of twelve trace elements (Pb, Sn, Cr, Co, Ni, V, Y, La, Zr, Cu, Zn, Sc) in different types of rocks using optical emission Spectroscopy (OES). The method employs a single set of synthetic standards for analysing any type of rock, basic, acidic or intermediate. When an external element, such as osmium, has been added to serve as internal standard, the analytical data showed poor precision. A new method of internal standardization has, therefore, been attempted. In this, a line due to silicon whose intensity is influenced by two adjacent Fe lines, has been used as the internal standard. Such an approach gave better presision (expressed in terms of coefficient of variation). Six international rock standards have been analysed and the data obtained have been compared with that previously reported.
    Notes: Zusammenfassung Zwölf Spurenelemente (Pb, Sn, Cr, Co, Ni, V, Y, La, Zr, Cu, Zn, Sc) werden in verschiedenen Gesteinstypen bestimmt. Basische, saure und intermediäre Gesteine können mit einem einzigen Satz synthetischen Standards analysiert werden. Bei Benutzung eines externen Elements (Os) zur Eichung wurden schlechte Ergebnisse erhalten. Bei dem neuen Verfahren wird eine bessere Reproduzierbarkeit (ausgedrückt als Variationskoeffizient) durch Verwendung einer Siliciumlinie, die durch benachbarte Eisenlinien beeinflußt wird, erzielt. Sechs internationale Standardgesteinsproben wurden nach diesem Verfahren untersucht und die Ergebnisse mit früher erhaltenen verglichen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00521176
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  • 6
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    Flow between torsionally oscillating disks rotating about different axes at different speeds (1982)
    Springer
    Details
    Publication Date: 1982-01-01
    Print ISSN: 0044-2275
    Electronic ISSN: 1420-9039
    Topics: Mathematics , Physics
    Published by Springer
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  • 7
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    Agricultural droughts and crop production in the Indian arid zone (1982)
    Springer
    Details
    Publication Date: 1982-10-01
    Print ISSN: 0066-6424
    Electronic ISSN: 1434-4483
    Topics: Geosciences , Physics
    Published by Springer
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  • 8
    Electronic Resource
    Electronic Resource
    Water and energy use efficiencies of native grasslands in the arid regions of India (1982)
    Springer
    Meteorology and atmospheric physics 31 (1982), S. 127-132 
    Details
    ISSN: 1436-5065
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Description / Table of Contents: Zusammenfassung Der Wasser- und Energieverbrauch von drei in ariden Gebieten Indiens gelegenen Weidelandbereichen wurde aufgrund von in den Jahren 1976 his 1978 durchgeführten Experimente nuntersucht. Vorwiegend mitLasiurus sindicus bewachsenes Weideland hatte trotz niedrigerer Feuchte einen höheren Wasserverbrauch (WUE) als Wirkung von niedrigem Dampfdruck und hohen Temperaturgradienten zwischen der Vegetationsdecke und den anliegenden Luftschichten während der Wachstumsperiode. Gemischtes Weideland hatte in Bikaner geringen Wasser- und Energieverbrauch.
    Notes: Summary The water and energy use efficiencies of three native grasslands situated in the arid regions of India were investigated based on the experiments conducted during the three years period 1976–1978. The grasslands dominated withLasiurus sindicus has shown higher water use efficiency (WUE) in spite of low moisture regime as a result of low vapour pressure and high temperature gradients between the canopy to adjacent air layers during the growing season. The mixed grasslands at Bikaner were found to have low energy and water use efficiencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311347
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis of phosphatidylcholine under possible primitive Earth conditions (1982)
    Springer
    Journal of molecular evolution 18 (1982), S. 196-202 
    Details
    ISSN: 1432-1432
    Keywords: Prebiotic synthesis ; Phospholipids ; Phosphatidylcholine ; Cyanamide ; Liposomes ; Primitive membranes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Using a primitive Earth evaporating pond model, the synthesis of phosphatidylcholine was accomplished when a reaction mixture of choline chloride and disodium phosphatidate, in the presence of cyanamide and traccs of acid, was evaporated and heated at temperatures ranging from 25° to 100°C for 7 hours. Optimum yields of about 15% were obtained at 80°C. Phosphatidylcholine was identified by chromatographic, chemical and enzymatic degradation methods. On enzymatic hydrolysis with phospholipase A2 and phospholipase C, lysophosphatidylcholine and phosphorylcholine were formed, respectively. Alkaline hydrolysis gave glycerophosphorylcholine. The synthesis of phosphatidylcholine as the major compound was accompanied by the formation of lysophosphatidylcholine in smaller amounts. Cyanamide was found to be essential for the formation of phosphatidylcholine, and only traces of HCl, of the order of that required to convert the disodium phosphatidate to free phosphatidic acid were found necessary for the synthesis. This work suggests that phosphatidylcholine, which is an essential component of most biological membranes, could have been synthesized on the primitive Earth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01733046
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  • 10
    Electronic Resource
    Electronic Resource
    Petrology of the alkaline rocks around Sivamalai, Coimbatore District, Tamilnadu, India (1982)
    Springer
    International journal of earth sciences 71 (1982), S. 263-279 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The alkaline rocks around Sivamalai are represented by syenites, nepheline syenites and basic alkaline rocks. The syenites are comprised of olivine-pyroxene, pyroxene, hornblende and biotite syenites and syenodiorites, pegmatite phases and quartz syenite. Nepheline syenites include pyroxene, hornblende and biotite bearing varieties. Syenites with pockets of garnet, magnetite or corundum occur in some places between the nepheline syenites and the country rocks represented dominantly by granitic gneisses. The basic alkaline rocks are represented by barkevikite melteigite and they occur as xenoliths amidst the nepheline syenites. The field mineralogical and petrochemical characteristics indicate the igneous nature of these rocks. The syenites and nepheline syenites are inferred to be evolved from pyroxene syenodiorite and barkevikite melteigite respectively. The irregular distribution of garnet and corundum is attributed to the metasomatism of the country rocks by the alkaline magma.
    Abstract: Résumé Les roches alcalins autor de Sivamalai sont représentées par des syénites, des syénites éléolitiques et de roches alcalines basiques. Les syénites comprennent des syénites à péridot, pyroxene, hornblende et biotite, et des syénodiorites, des phases pegmatitiques et des syénites quartziféres. Les syénites éléolitiques comprennent des variétés à pyroxene, hornblende et biotite. Des syénites avec poches à grenat, magnétite ou corindon se rencontrent en quelques endroits entre les syénites éléolitiques et les roches encaissantes représentées principalement par gneiss granititiques. Les roches alcalines basiques sont représentées par des melteigites barkévictiques et se rencontrent en enclaves dans les syénites à néphéline. Les caractéristiques sur le terrain, minérologiques et pétrochimiques, indiquent le caractère igné de ces roches. Les syénites et les syénites éléolitiques sont considérées comme dérivant respectivement de syénodiorites pyroxéniques et de melteigites barkévictiques. La répartition irregulière du grenat et du corindon est attribuée à la métasomatose des roches encaissantes sous l'influence du magma alcalin.
    Notes: Zusammenfassung Die alkalischen Gesteine um Sivamalai umfassen Syenite, Nephelinsyenite und basische alkalische Gesteine. Die Syenite sind aus Olivin-Pyroxen, Pyroxen, Hornblende und der Biotitsyenit, Syenodiorit, Pegmatitphasen und Quarzsyenit zusammengesetzt. Die Nephelinsyenite schließen Varietäten mit Pyroxen, Hornblende und die Biotite ein. Syenite mit Granatlinsen, Magnetit oder Korund schalten sich an einigen, Stellen zwischen Nephelinsyenite und die weiter verbreiteten granitischen Gneise. Die basischen Alkaligesteine werden durch barkeviktischen Melteigit vertreten und finden sich als Xenolithe im Nephelinsyenit. Der mineralogische und petrochemische Feldbefund läßt auf eruptiven Charakter dieser Gesteine schließen. Es wird angenommen, daß die Syenite und Nephelinsyenite sich aus Pyroxensyenodiorit und Barkevikitmelteigit entwickelt haben. Die ungleichförmige Verteilung von Granat und Korund wird auf die Metasomatose der umgebenden Gesteine durch alkalisches Magma zurückgeführt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01825041
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