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  • Author or Editor: Suresh Aggarwal x
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Abstract  

A concentrated ammonium nitrate solution (80 g L−1) generated during reprocessing of nuclear fuels was analysed for determining trace amounts of actinides present prior to its reuse or disposal. A gamma spectrometric method using HPGe detector was developed for the assay of uranium (U), plutonium (Pu) and americium (Am) using a suitable calibration sample. The results obtained were validated by liquid scintillation counting. The presence of significant amounts of plutonium necessitated repeated purification of ammonium nitrate before its reuse.

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Abstract  

The paper examines the scientific productivity of male and female scientistts working in the Council of Scientific and Industrial Research (CSIR), India at the overall agency level and at the group of laboratories level, characterized by three broad subjects of physical, biological, and engineering sciences. The productivity of scientists is evaluated on the basis of three parameters: the extent of scientists not publishing any paper, the average number of papers per scientist, and using Lotka's approach. In order to find out whether there is any significant difference between male and female productivity distributions, a Chi-square test is used. Studies the applicability of Lotka's inverse power law and some other statistical models in the distribution of scientific productivity of male and female scientists. Concludes that no significant difference exists between productivity distributions of male and female scientists.

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Abstract  

Instrumental neutron activation analysis (INAA) was employed to determine concentrations of 19 elements (As, Ba, Br, Ce, Co, Cr, Cs, Fe, K, La, Mn, Na, Nd, Rb, Sc, Sm, Th, Yb and Zn) in a large number (55) of tea samples (from market as well as virgin tea leaves) from different locations in India (Assam, Darjeeling, Munnar and Kangra). The results obtained in the present work are compared with those reported in literature. The concentration levels, their variations with collection locations and the correlations among different elements in these samples are discussed.

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