Author
Ranjan K. Singh
Other affiliations: Schiller International University, University of Würzburg
Bio: Ranjan K. Singh is an academic researcher from Banaras Hindu University. The author has contributed to research in topics: Raman spectroscopy & Liquid crystal. The author has an hindex of 20, co-authored 134 publications receiving 1465 citations. Previous affiliations of Ranjan K. Singh include Schiller International University & University of Würzburg.
Papers published on a yearly basis
Papers
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2 citations
TL;DR: In this paper, the important cyclization reaction of antioxidant drug N-acetyl-l-cysteine (NAC) was monitored in vitro at basic pH with the help of time series Raman spectroscopy.
Abstract: The important cyclization reaction of antioxidant drug N-acetyl-l-cysteine (NAC) has been monitored in vitro at basic pH with the help of time series Raman spectroscopy. The thiazoline ring formati...
2 citations
TL;DR: A detailed analysis of the variation of the linewidth and peak position of the two component bands leads to the conclusion that the molecular/dimer arrangement in crystalline packing changed between 173K and 203K.
2 citations
Journal Article•
TL;DR: In this article, the authors propose the formation of stable stabilite complexes Ni(G − ) +, Ni (G 2 − ), Pb(G + ) +, Pb +, Pb 2 +, Cr(G 2 + ), Cr 2 2 2+, Cr 2 3, Cr 3, Al 2, Al 3, Th(G 3 ) 3+, Th 2 3 +, Th 3 + and Th 2 2 +.
Abstract: Formation de complexes Ni(G − ) + , Ni(G 2 − ), Pb(G − ) + , Pb(G − ) 2 , Cr(G − ) 2+ , Cr(G − ) 2 + , Cr(G − ) 3 , Al(G − ) 3 , Th(G − ) 3+ et Th(G − ) 2 2+ . Constantes de stabilite
2 citations
TL;DR: Raman spectra of acetonitrile (Acn) in different millimolar (mM) concentrations adsorbed on Ag nano-colloids were recorded in the region 2100-3300cm(-1) and the nu(CN) and nu(C-H) modes show blue shifts when the concentration of Acn in the mixture is increased from 2 to 8mM.
2 citations
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TL;DR: The limit of sensitivity in SERS is introduced in the context of single-molecule spectroscopy and the calculation of the ‘real’ enhancement factor, which illustrates the broad applications of this powerful technique.
Abstract: Surface-enhanced Raman spectroscopy (SERS) combines molecular fingerprint specificity with potential single-molecule sensitivity. Therefore, the SERS technique is an attractive tool for sensing molecules in trace amounts within the field of chemical and biochemical analytics. Since SERS is an ongoing topic, which can be illustrated by the increased annual number of publications within the last few years, this review reflects the progress and trends in SERS research in approximately the last three years. The main reason why the SERS technique has not been established as a routine analytic technique, despite its high specificity and sensitivity, is due to the low reproducibility of the SERS signal. Thus, this review is dominated by the discussion of the various concepts for generating powerful, reproducible, SERS-active surfaces. Furthermore, the limit of sensitivity in SERS is introduced in the context of single-molecule spectroscopy and the calculation of the 'real' enhancement factor. In order to shed more light onto the underlying molecular processes of SERS, the theoretical description of SERS spectra is also a growing research field and will be summarized here. In addition, the recording of SERS spectra is affected by a number of parameters, such as laser power, integration time, and analyte concentration. To benefit from synergies, SERS is combined with other methods, such as scanning probe microscopy and microfluidics, which illustrates the broad applications of this powerful technique.
706 citations
TL;DR: In this paper, the authors presented an Austrian Federal Ministry of Science, Research and Economy and National Foundation for Research, Technology and Development (NFthis paper ) supported by the OMV Group, the EPSRC (DTA studentships for D.W. and T.E.O.), the World Premier Institute Research Center Initiative (WPI), MEXT, Japan (to K.L., GAN 701192 - VSHER), the German Research Foundation (to M.F.
Abstract: This work was supported by the Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy and the National Foundation for Research, Technology and Development), the OMV Group (to E.R.), the EPSRC (DTA studentships for D.W.W. and T.E.R), the Isaac Newton Trust, the German Research Foundation (to M.F.K.), the World Premier Institute Research Center Initiative (WPI), MEXT, Japan (to K.L.O.) and a Marie Curie Research fellowship (to K.H.L., GAN 701192 - VSHER).
383 citations
08 Oct 2018
TL;DR: Xerographic photoreceptors charge acceptance and dark discharge photoinduced discharge photogeneration theories photogengeneration in organic solids charge transport theories charge transport in polymers and related materials experimental techniques photoreceptor preparation photoresceptors fatigue summary and future requirements.
Abstract: Xerographic photoreceptors charge acceptance and dark discharge photoinduced discharge photogeneration theories photogeneration in organic solids charge transport theories charge transport in polymers and related materials experimental techniques photoreceptor preparation photoreceptors fatigue summary and future requirements.
378 citations
TL;DR: In the future of all-conquering genetic technology, who should be screened for what and by whom?
Abstract: Ed Lori B Andrews, Jane E Fullarton, Neil A Holtzman, Arno G Motulsky National Academy Press, £28.95, pp 338 ISBN 0-309-04798-6
Genetic screening tends to serve as a flypaper on which our hovering fears of a Brave New World alight and stick. In the future of all-conquering genetic technology, who should be screened for what and by whom? Here is a dense report, compiled by a committee of the great and the good, with hundreds of recommendations for action and inaction. How much …
332 citations
TL;DR: CQDs, their structure, and PL characteristics are introduced and recent advances of the application of CQDs in biotechnology, sensors, and CL is comprehensively discussed.
286 citations