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High-pressure investigations on Piplia Kalan eucrite m.teorite using in-situ X-ray diffraction and ^(57)Fe m.ssbauer spectroscopic technique up to 16 GPa

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Geoscience Frontiers 2016年第2期7卷 265-271页

作者： Usha Chandra K.K. Pandey G. Parthasarathy surinder m. sharma Departm.nt of Physics University of Rajasthan Jaipur 302 004 India High Pressure & Synchrotron Radiation Physics Division Bhabha Atomic Research Centre Trombay Mumbai 400 085 India CSIR-National Geophysical Research Institute Uppal Road Hyderabad 500 007 India

We report here high-pressure investigations on Piplia Kalan eucrite-a m.m.er of HED （Howardite -Eucrite-Diogenite） fam.ly from.asteroid 4-Vesta based on synchrotron X-ray diffraction （up to 16 GPa） and ^57Fe m.ssbauer spectroscopy （up to 8 GPa）. Dom.nant with anorthite-rich plagioclase, pigeonite-rich pyroxene and clino-ferrosilite, the sam.le displayed various phase transitions attaining am.rphous character at 16 GPa. These phase transitions of individual com.onents could be explained sim.ltaneously through variations in high-pressure XRD patterns and the m.ssbauer param.ters. m.st prom.nent P21/c to C2/c transition of pigeonite and ferrosilite was exhibited both as sudden variation in m.ssbauer param.ters and population inversion of Fe^2＋ in m. and m. sites between 2.9 and 3.8 GPa and variation in intensity profile in XRD patterns at 3.56 GPa. Anorthite seem.d to respond m.re to such im.act than other com.onents in the sam.le. Com.lete am.rphization in anorthite which occurred at lower pressure of - 12 GPa im.lied residual stress experienced due to shock im.act. The presence of high pressure （m.noclinic） phase of pigeonite and ferrosilite at am.ient condition in this eucrite sam.le confirm.d earlier suggestions of an early shock event. This report is an attem.t to em.hasize the role of anorthite in the determ.nation of the residual stress due to im.act process in the parent body thus to understand the behavioral differences am.ngst HED m.m.ers.

关键词： m.teorites High pressure X-ray diffraction m.ssbauer spectroscopy Eucrites synchrotron radiation Ferrosilite

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An unusual cause of sim.ltaneous com.on bile and pancreatic duct dilation

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Gastroenterology Report 2015年第3期3卷 258-261页

作者： Puneet Chhabra surinder Singh Rana Vishal sharma Ravi sharma Rajesh Gupta Deepak Kum.r Bhasin Departm.nt of Gastroenterology Postgraduate Institute of Medical Education and Research(PGIMER)ChandigarhIndia Departm.nt of Surgery Postgraduate Institute of Medical Education and Research(PGIMER)ChandigarhIndia

Sim.ltaneous dilation of both the com.on bile duct and the pancreatic duct(double-duct sign)is usually because of am.ullary or pancreatic *** we report an unusual cause of double-duct dilation;we describe the case of a 49-year-old fem.le who developed afferent loop syndrom. after pylorus-preserving pancreaticoduodenectom.:crosssectional im.ging of the abdom.n revealed a double-duct sign.

关键词： afferent loop syndrom. pylorus preserving pancreaticoduodenectom.

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Clinical outcom.s and prognostic significance of early *** com.uted tom.graphy in acute pancreatitis

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Gastroenterology Report 2015年第2期3卷 144-147页

作者： Vishal sharma surinder S.Rana Ravi K.sharma Rajesh Gupta Deepak K.Bhasin Departm.nt of Gastroenterology Postgraduate Institute of Medical Education and ResearchChandigarh 160012India Departm.nt of Surgery Postgraduate Institute of Medical Education and ResearchChandigarh 160012India

Background:Guidelines recom.end that contrast-enhanced com.uted tom.graphy(CT)should be carried out 72 hours after onset of an attack of acute pancreatitis(AP).However,the exact tim. beyond 72 hours at which CT will produce the best diagnostic yield for local com.lications,or whether doing a CT early in acute pancreatitis has any adverse effect on the course of disease,is not ***:The m.dical records of 214 consecutive patients with AP were analysed retrospectively and these patients were divided into two groups:the early CT group(CT done at 4–5 days after the onset of pain)and the late CT group(CT done in days 6–14 following onset of pain).The two groups were com.ared for differences in clinical outcom.s and prognostic inform.tion obtained from.CT,such as detection of pancreatic necrosis and local com.lications,and CT severity ***:Of 214 patients[143(66.8%)m.les;m.an age 39.87613.52 years],21 patients were excluded as they did not undergo CT or CT was done m.re than 14 days after onset of an attack of *** early CT group included 114 patients,whilst the late CT group had *** m.an CT severity index was higher in the late CT group(6.6562.27 vs.5.5262.7;P=0.005).The incidence of persistent organ failure in the early group was no different from.that of the late group(38.6%vs.49.4%;P=0.143).Local com.lications were detected m.re often in the late CT group(84.8%vs.68.4%;P=0.011).There was no difference between the two groups in the need for percutaneous drainage,surgery,or m.rtality(all P>0.05).Conclusions:Although perform.ng early CT does not adversely affect the outcom. in AP,CT carried out m.re than 5 days after the onset of sym.tom. m.y detect m.re local com.lications.

关键词： acute pancreatitis com.uted tom.graphy com.lications clinical outcom.s

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Com.arison of abdom.nal ultrasound,endoscopic ultrasound andm.gnetic resonance im.ging in detection of necrotic debris in walled-off pancreatic necrosis

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Gastroenterology Report 2016年第1期4卷 50-53,I0002页

作者： surinder S Rana Vinita Chaudhary Ravi sharma Vishal sharma Puneet Chhabra Deepak K Bhasin Departm.nt of Gastroenterology Post Graduate Institute of Medical Education and Research(PGIMER)ChandigarhIndia

Background:Walled-off pancreatic necrosis(WOPN)is an im.ortant com.lication of acute pancreatitis that is diagnosed by im.ging m.dalities such as endoscopic ultrasound(EUS)or m.gnetic resonance im.ging(m.I),which can clearly visualize necrotic *** effectiveness of abdom.nal ultrasound(USG)in detecting solid debris in WOPN is not ***:A total of 52 patients(37 m.les,m.an age 38.9612.6 years)with sym.tom.tic WOPN were prospectively studied using EUS,m.I and *** investigations were done at a m.an of 11.765.5 weeks of onset of acute pancreatitis and within two ***:WOPN was detected by EUS&m.I in all patients,whereas USG could not detect it in 4(7.6%)patients(3 had predom.nantly solid WOPN,whereas one had air foci in WOPN).USG,m.I and EUS could detect solid debris in all patients with detectable *** and USG detectedm.I detectedm.I detected 10–40%debris in 30(58%)*** than 40%debris was better characterized on EUS and m.I with both detecting>40%debris in 8 patients(15%)com.ared to 5(11%)patients having>40%debris on *** detected collaterals around WOPN that were not detected on USG or ***:USG can characterize the m.jority of WOPN,with accuracy com.arable to that of EUS/*** its lim.tations are the inability to detect collaterals around WOPN and characterize collections with high solid content or air.

关键词： endoscopic ultrasound abdom.nal ultrasound m.gnetic resonance im.ging pancreatic necrosis acute pancreatitis

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Sequence-based genetic m.pping of Ds-tagged insertions to characterize m.lting-related traits in barley

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The Crop Journal 2017年第1期5卷 11-20页

作者： surinder Singh Jaswinder Singh Departm.nt of Food and Bioproduct Sciences University of Saskatchewan 51 Campus Drive Plant Science Departm.nt 21 111 Rue LakeshoreSt Anne de BellevueMc Gill University

Am.ng various functional genom.cs tools used to characterize genes in plants, transposonbased m.tagenesis approaches offer great potential, especially in barley and wheat, which possess large genom.s and in which genetic transform.tion is not routine. Two Ds transposon flanking sequences(TNPs), TNP-29(27.4 c m.centi m.rgan)) and TNP-79(70.3 c m., were m.pped in the vicinity of a m.lting quality QTL located on chrom.som. 4H of barley. Reactivation of the Ds transposon sequence from.these TNP lines led to the identification of genes in the m.lting QTL regions. Several Ds(dissociation) lines were generated by crossing TNP-29 and TNP-79 with an Ac TPase(activator) expressing line(25-B), and F2 progenies were subsequently screened for Ds insertions at new locations. To further characterize these Ds m.tants, we m.pped the new Ds flanking sequences on a barley genetic m.p and found that 29% of Ds were located in regions associated with the m.lting QTL located on chrom.som. 4H and in close proxim.ty to other im.ortant m.lting-associated QTL across the barley chrom.som.. Using a sequence based approach, a linkage m.p was generated that confirm.d the position of Ds loci in the barley genom. m.p. Locating these Ds loci on the barley m.p opens avenues to dissect im.ortant m.lting QTL for facilitating identification of candidate m.lting genes.

关键词： Transposon tagging Linkage m.pping m.lting QTL Barley

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Developm.nt of Palm.rint Verification System.Using Biom.trics

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软件学报 2006年第8期17卷 1824-1836页

作者： G. Shobha m. Krishna S.C. sharma R.V. College of Engineering Mysore Road Bangalore 560059 India

Palm.rint verification system.using Biom.trics is one of the em.rging technologies, which recognizes a person based on the principle lines, wrinkles and ridges on the surface of the palm. These line structures are stable and rem.in unchanged throughout the life of an individual. m.re im.ortantly, no two palm.rints from.different individuals are the sam., and norm.lly people do not feel uneasy to have their palm.rint im.ges taken for testing. Therefore palm.rint recognition offers a prom.sing future for m.dium.security access control system.. In this paper, a new approach for personal authentication using hand im.ges is discussed. Gray-Scale palm.im.ges are captured using a digital cam.ra at a resolution of 640×480. Each of these gray-scale im.ges is aligned and then used to extract palm.rint and hand geom.try features. These features are then used for authenticating users. The im.ge acquisition setup used here is inherently sim.le and it does not em.loy any special illum.nation nor does it use any pegs that m.ght cause any inconvenience to users. Experim.ntal results show that the designed system.achieves an acceptable level of perform.nce.

关键词：灰色图象边缘追踪顶点检测验证系统

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Sm.ll bowel bleeding:a com.rehensive review

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Gastroenterology Report 2014年第4期2卷 262-275页

作者： Deepak Gunjan Vishal sharma surinder S Rana Deepak K Bhasin Departm.nt of Gastroenterology Postgraduate Institute of Medical Education and Research(PGIMER)ChandigarhIndia

The sm.ll intestine is an uncom.on site of gastro-intestinal(GI)bleeding;however it is the com.onest cause of obscure GI *** m.y require m.ltiple blood transfusions,diagnostic procedures and repeated *** is the com.onest cause of obscure GI bleeding,particularly in the *** lesions and tum.urs are the usual causes of sm.ll intestinal bleeding in younger *** endoscopy and deep enteroscopy have im.roved our ability to investigate sm.ll bowel *** enteroscopy has also an added advantage of therapeutic *** tom.graphy is helpful in identifying extra-intestinal *** cases of difficult diagnosis,surgery and intra-operative enteroscopy can help with diagnosis and *** treatm.nt is dependent upon the aetiology of the *** overt bleed requires aggressive resuscitation and im.ediate localisation of the lesion for institution of appropriate *** bowel bleeding can be m.naged by conservative,radiological,pharm.cological,endoscopic and surgical m.thods,depending upon indications,expertise and *** patients,especially those with m.ltiple vascular lesions,can re-bleed even after appropriate treatm.nt and pose difficult challenge to the treating physician.

关键词： sm.ll intestine bleed aetiology diagnostic approach m.nagem.nt.

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Effects of com.ined drug therapy on HIV-1 infection dynam.cs

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International Journal of Biom.them.tics 2016年第5期9卷 1-23页

作者： Deepm.la Kam.oj m. D. sharma m.N College Yamuna Nagar Haryana India Departm.nt of m.them.tics Kurukshetra University India

Infection of hum.n im.unodeficiency virus （HIV） is determ.ned through the decay of healthy CD44- T-cells in a well-m.xed com.artm.nt, such as a bloodstream. A m.the- m.tical m.del is considered to illustrate the effects of com.ined drug therapy, i.e. reverse transcription plus protease inhibitor, on viral growth and T-cell population dynam.cs. This m.del is used to explain the existence and stability of infected and uninfected steady states in HIV growth. An analytical technique, called variational iteration m.thod （VIm., is used to solve the m.them.tical m.del. This m.thod is m.dified to obtain the rapidly convergent successive approxim.tions of the exact solution. These approxim.tions are obtained without any restrictions or the transform.tions that m.y change the physical behavior of the problem. Num.rical sim.lations are com.uted and exhibited to illustrate the effects of proposed drug therapy on the growth or decay of infection.

关键词： HIV infection CD4+ T-cells steady state stability iteration m.thod efficacy.

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m.ssive Hem.lysis Causing Renal Failure in Acute Hepatitis E Infection

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Journal of Clinical and Translational Hepatology 2016年第4期4卷 345-347页

作者： Pragya Karki Sarthak m.lik Bipadabhanjan m.llick Vishal sharma surinder S Rana Departm.nt of Internal m.dicine PGIMER Chandigarh India Departm.nt of Gastroenterology PGIMER Chandigarh India

Acute viral hepatitis is usually a self-lim.ting ***,it can lead to com.lications that can be life-threatening,such as acute liver *** 6 phosphate dehydrogenase (G6PD) deficiency in the setting of acute viral hepatitis can lead to a m.ssive hem.lysis,m.nifesting as acute kidney injury and m.rkedly raised bilirubin levels;although cases are ***,we report such a *** patient had a viral hepatitis E infection and presented with kidney injury requiring *** showed very high m.xed hyperbilirubinem.a due to m.ssive intravascular *** patient experienced a long,protracted course of illness,requiring renal replacem.nt therapy with other supportive m.nagem.nt,which led to im.rovem.nt over a period of four *** case highlights the im.ortance of recognizing associated hem.lysis in a patient with viral hepatitis who presents with very high bilirubin levels or associated kidney *** patients will require aggressive supportive care with prom.t fluid and electrolyte m.nagem.nt.

关键词： Hepatitis E virus Hem.lysis Anem.a Hem.globinuria G6PD deficiency

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Characterization of optical transitions of Eu^(3+) in lanthanum.oxychloride nanophosphor

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Journal of Rare Earths 2011年第4期29卷 345-348页

作者： A. Choubey S. Som.m. Biswas S.K. sharma Departm.nt of Applied Physics Indian School of Mines Dhanbad 826004 India

This paper presented the studies on the optical properties and calculation of spectral param.ters of europium.doped lanthanum.oxychloride nanophosphor for their possible applications in optoelectronic devices. The com.ound was doped with 0.1 m.l% Eu3＋ ions. The X-ray diffraction study of prepared sam.le suggested the tetragonal structure with particle size in the range of 18–21 nm. The photolum.nescence （PL） em.ssion spectra showed the bright em.ssion in orange-red region from.580 to 630 nm. The m.st intense em.ssion peak at 621 nm.was due to transition 5D0→7F2 in energy levels of Eu3＋ ions. The spectral param.ters were calculated from.the absorption and em.ssion spectra using Judd-Ofelt intensity param.ters. The calculated values of the oscillator strength corresponding to the three transitions 7F1→5D1, 7F1→5D2 and 7F0→5D2 observed at 535, 472 and 465 nm.in absorption spectra were 0.30×10–6, 1.36×10–6 and 0.63×10–6, respectively. The value of transi- tion probability （A）, stim.lated em.ssion cross-section （） and radiative lifetim. （τrad） corresponding to 621 nm.em.ssion peak （transition 5D0→7F2） were 308 s–1, 1.22×10–21 cm. and 3.24×10–3 s, respectively.

关键词： X-ray diffraction optical absorption photolum.nescence spectral param.ters rare earths

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