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Abstract  

Solvent extraction of plutonium(VI) from nitric acid (1 to 5M) into 20% and 30% TBP in dodecane saturated with uranium(VI) (0% to 80%) has been studied. For a particular nitric acid concentration, the distribution coefficient (K d ) is found to decrease with the increase in saturation of organic phase with uranium(VI). At a fixed organic phase the saturationK d increased with increase in nitric acid concentration, however, the magnitude of this increase inK d decreased with the increase in saturation.

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Summary  

Radioanalytical techniques have been applied in a study on (subclinical) hepatitis in Dobermann dogs. Cu levels in transcutaneous obtained full liver biopsies were quantified using INAA and 66Cu. A copper excretion study was performed in a group of completely normal Dobermann dogs and in six Dobermanns with elevated copper levels and suffering from subclinical hepatitis. 64Cu2+ was used to assess whether a normal bile flow and thus excretion was possible. All subjects underwent separately from this 64Cu2+ excretion study a 99mTc-Bis-IDA scintigraphy. The Cu levels in liver of these hepatitis patients vary from 600 to 1600 mg . kg-1 whereas 100-300 mg . kg-1 is probably normal for healthy Dobermann dogs. These Cu levels match fully with histopathology results and clinical observations. Measurements during a 2 years' evaluation period showed a clear relation between the existence of subclinical hepatitis and increased Cu levels without a sign for cholestasis or an abnormal bile flow.

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Abstract  

A rapid and high resolution separation of lanthanides by HPLC technique has been developed using Di-(2-ethylhexyl) phosphoric acid (HDEHP) coated reverse phase column and a-hydroxy isobutyric acid as the complexing reagent for elution. A gradient elution technique has been developed for achieving the separation of the entire lanthanide series. Isocratic elution procedure has also been developed for the separation of lighter (La to Gd) as well heavier lanthanides (Lu to Tb). This paper describes the separation methods developed and their application for the determination of lanthanides in a fission product mixture.

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Scientometrics
Authors:
B. S. Kademani
,
V. L. Kalyane
,
Vijai Kumar
, and
Lalit Mohan

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Scientometrics
Authors:
B.M. Gupta
,
Suresh Kumar
,
S. Sangam
, and
C.R. Karisiddappa

Abstract  

The main objectives of this study are: (a) to find the applicability of selected growth models to the growth of publications in six sub-disciplines of social sciences, namely anthropology, economics, history, political science, psychology, and sociology in the world; and (b) to verify the criteria for selecting the most appropriate growth model suggested by Eggheand Rao (1992).

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Genotype by environment interaction distorts genetic analysis, changes relative ranking of genotypes and a major obstruction for varietal release. AMMI model is a quick and relevant tool to judge environmental behaviour and genotypic stability in comparison to ANOVA, multiplicative model and linear regressions. We evaluated 19 barley genotypes grown at 08 diverse locations to identify discriminating environments and ideal genotypes with dynamic stability. In AMMI ANOVA, the locations and genotype by environment interaction exhibited 66% and 14.7% of the total variation. The initial first two principal components showed significant interaction with 36.0 and 28.4% variation, respectively. AMMI1 biplot showed that the environments Bawal, Ludhiana and Durgapura were high yielding with high IPCA1 scores and located far away from the biplot origin. However, in AMMI1and AMMI2 biplots the locations Hisar, Ludhiana, Karnal, Bathinda and Modipuram were found suitable with low IPCA2 scores. Yield stability index (YSI) was highly useful with ASV ranks and the genotypes DWRB150 and BH1013 and checks BH902, DWRUB52 and DWRB101 were selected for high grain yield and wider adaptability across the locations.

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Abstract  

Ion-exchange papers were prepared by impregnating chromatographic Whatman No. 3 paper with pyridinium tungstoarsenate exchanger. The composition of the material loaded on the paper shows that the compound has the formula (C5H5NH)3 W1 2AsO4 0·Rf values of 30 metal ions were determined on these ion-exchange papers by developing with ascending technique in solvents containing mixtures of n-propanol and hydrochloric or nitric acid. Several binary, ternary and some quaternary separations were also achieved on these papers. Studies were also made on plain papers for comparison.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
Shekhar Kumar
,
S. Balasubramonian
,
D. Sivakumar
,
U. Mudali
, and
R. Natarajan

Abstract  

Di-(2-ethyl hexyl) phosphoric acid (hereafter referred as D2EHPA) is an important solvent for solvent extraction industry. It is also used in nuclear solvent extraction as a solvent for TALSPEAK and REVERSED TALSPEAK processes for actinide (III)–lanthanide (III) separation. Its PVT properties are not available in literature. In this work, group-contribution approach was used to predict its PVT properties as well as selected physical properties like normal boiling point.

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Acta Biologica Hungarica
Authors:
Kokkadan K. Srikumar
,
Sukumaran Smitha
,
Bastian S. Kumar
, and
Balakrishnan Radhakrishnan

Helopeltis theivora is considered as one of the major pest in tea plantations causing considerable economic damage. Recent control strategies against this notorious polyphagous pest mainly depend on the application of insecticides. The study is focused on the antennal response of H. theivora on exposure to different insecticides using electroantenogram (EAG). The result showed that the insects perceive quinalphos as they are frequently exposed to it. The hierarchy of the EAG response of exposed and unexposed insects was quinalphos > bifenthrin > deltamethrin > thiamethoxam.

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