Amita Sarkar

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Extraction of Cs-137 from nitric acid was carried out using nitrobenzene solutions of calix-crowns such as calix[4]arene-bis(crown-6) (CC-A), calix[4]arene-bis(benzo crown-6) (CC-B) and calix[4]arene-bis(napthocrown-6) (CC-C). CC-C was found to be superior extractant for Cs(I) as compared to the other two calix-crown ligands used in the present study. The(More)
A modification of the conventional split-skin graft is presented. This modification provides a gain in the length of the donor skin up to a maximum of 1:1.92. The gain in length is achieved in a very short period during an emergency operation. No special instrument is required. This technique has been proved to be useful in burn cases having much less donor(More)
Eight gravity cores from the active eastern continental margins of the Arabian Sea were dated using 210Pbxs, 137Cs and 14C. The short-term (< or = 100 years) sedimentation rates range from 0.06 to 0.66 cm/year where as the long-term (> or = 1000 years) ones using AMS 14C on planktonic foraminifera varied from 0.004 to 0.13 cm/year. For long-term chronology(More)
Development, growth and reproduction are influenced by daily and seasonal variations of photoperiod in teleost fish. Experiments were carried out to investigate the environmental regulation of reproduction in cat fish (Clarias batrachus) with special reference to the role of photoperiod. The effect of the photoperiod and temperature regimes on reproductive(More)
An eleven-week experiment was conducted in a laboratory to study the effect of different light/dark cycles on Feed conversion ratio (FCR),Specific growth rate (SGR% day), and Condition factor (K) of Goldfish, Carassius auratus. Fish were stocked in glass aquariums under four Photoperiodic regimes 18L/ 6D, 10L/14D, 6L/18D, an intermediate photoperiod 12L/12D(More)
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