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Assessment of nitrogen and sulphur cycle bacteria and shrimp production in ponds treated with biological products

Journal of Coastal Life Medicine 2015年第6期 466-470页

作者： Thangapalam Jawahar Abraham shubhadeep ghosh Debasis Sasmal Department of Aquatic Animal Health Faculty of Fishery SciencesWest Bengal University of Animal and Fishery SciencesKolkata 700094India

Objective:To study the influence of biological products on the levels of nitrogen and sulphur cycle bacteria in shrimp culture systems of West Bengal,***:The pond water and sediment samples were analyzed for physico-chemical parameters as per standard *** bacteria involved in ammonification,nitrification,denitrification,sulphate reduction and sulphur oxidation were enumerated by most probable number ***:The semi-intensive and modified extensive shrimp farms used a variety of biological products during various stages of *** biological products were used in traditional *** water and sediment samples of modified extensive system recorded significantly higher mean heterotrophic bacterial *** counts of ammonia,nitrite and sulphur oxidizers,and nitrate and sulphate reducers varied among the *** cycling of nitrogen and sulphur appeared to be affected with the intensification of culture ***:The application of biological products in certain systems helped to maintain the bacteria involved in nitrogen and sulphur cycles and safe levels of ammonia,nitrite and *** assessment of these metabolically active bacteria in shrimp culture ponds and the application of right kind microbial products would help ameliorate the organic pollution in shrimp aquaculture.

关键词： Shrimp culture Biological products Heterotrophic bacteria Nitrogen cycle bacteria Sulphur cycle bacteria

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Determination of upper reference value of urinary calcium-creatinine ratio for the paediatric population in Burdwan district

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Advances in Biological Chemistry 2013年第5期3卷 455-459页

作者： Mrinal Pal Subinay Datta Amit Kumar Pradhan Tapas ghosh Amrita Ganguly shubhadeep Basu Joydeep ghosh Rajarshi Rahut Department of Anatomy Burdwan Medical College Burdwan India Department of Biochemistry Burdwan Medical College Burdwan India

To estimate the rate of excretion of urinary calcium, a 24-hour sample of urine is required and this is not always easy to collect accurately in infant and children. So, random urine calcium to creatinine ratio (Ca/Cr ratio) has been developed. But as the ratio varies worldwide, reference values of the parameter in paediatric population are not developed. To determine reference value, the present study was conducted in healthy paediatric population in Burdwan district, West Bengal. This study was performed on 693 healthy paediatric subjects, aged between 3 months to 18 years and divided into five groups. Early morning non-fasting urine samples from all study groups were analyzed for Ca/Cr ratio. A negative correlation was observed between age and urinary Ca/Cr ratio, but there was no significant difference of urinary Ca/Cr ratio between two sexes. Considering 97.5th percentile of the underlying distribution of values as the upper limit of reference range, upper reference values of urinary Ca/Cr ratio for age groups

关键词： Urinary Calcium-Creatinine Ratio Hypercalcuria Reference Range

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