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The evolution of graphene-based electronic devices

International Journal of Smart and Nano Materials 2010年第3期1卷 201-223页

作者： joydeep basu Jayanta Kumar basu Tarun Kanti Bhattacharyya Department of Electronics and Electrical Communication Engineering Department of Chemical Engineering Indian Institute of TechnologyKharagpur 721302India

Successful isolation of single-layer graphene,the two-dimensional allotrope of carbon from graphite,has fuelled a lot of interest in exploring the feasibility of using it for fabrication of various electronic devices,particularly because of its exceptional electronic *** is poised to save Moore’s law by acting as a successor of silicon-based *** article reviews the success story of this allotrope with a focus on the structure,properties and preparation of graphene as well as its various device applications.

关键词： electronic device FET field effect graphene nanoelectronics

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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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