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高电压技术 2008年第12期34卷 2642-2647页

作者： M. Venu Gopala Rao J. Amarnath G.V. Nagesh k.mar S. k.mak.haiah k. d. srivastava QIS College of Engineering and.Technology Ongole 523272 Andhra Pradesh India College of Engineering Jawaharlal Nehru Technological University Kuktrtpally Hyderabad 500085 Andhra Pradesh India Vignan's Institute of Information Technology Visakhapatnam 530046 Andhra Pradesh India C. V. R. College of Engineering Hyderabad Andhra Pradesh India University of British Colombia Vancouver B. C. V6T 1Z4 Canada

Transient over voltages d.e to lightning and.switching surges cause steep build.up of voltage on transmission lines and.other electrical apparatus,lik. circuit break.rs,transformers,insulators *** it is necessary for the GIS also to withstand.such voltages without break.own of *** system has to be tested.und.r these *** the GIS system operates on power *** Impulse Voltage of 1050 k. and.Switching Impulse Voltage of 750 k. superimposed.on Power frequency voltages of 75 k.,100 k. and.132 k. are applied.to Single Phase Gas Insulated.Busd.ct and.the maximum movement of Aluminum,Copper and.Silver particles is *** movement patterns are also d.termined.with and.without Monte Carlo Simulation for movement of particle in axial and.rad.al *** results show that there is a sud.en jump in the movement at the application of impulse on sine *** is because of high magnitud. voltage of 1050 k. d.ring 1.2/50 μ*** movement patterns of red.ced.maximum movement is observed.for Switching Impulse superimposed.on sine *** results are presented.and.analyzed.

关键词：重复雷击金属微粒运动形态气相绝缘站粒子污染物

沿冰层表面流注传播场稳定性的实验研究与分析(英文)

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高电压技术 2009年第6期35卷 1284-1293页

作者： I.Nd.aye M.Farzaneh k.d.srivastava NSERC/Hyd.o-Quebec/UQAC Ind.strial Chair on Atmospheric Icing of Power Network.Equipment(CIGELE) and.Canad. Research Chair on Engineering of Power Network.Atmospheric Icing(INGIVRE) at Universit d. Qubec Chicoutimi University of British Columbia Department of Electrical & Computer EngineeringVancouver

The electric field.required.for stable propagation of a positive streamer along an ice surface was investigated.by measuring the currents associated.with the streamer *** influence of the surface properties,namely the existence of a water film on the ice surface and.surface contamination,was *** showed.that in the presence of an ice surface,except in case of low cond.ctive surface,streamers propagate stably with an external field.lower than that generally measured.for propagation in air alone(approximately 5 k./cm).For higher contamination levels,the stability field.was found.to be slightly influenced.by the temperature,while for lower contamination levels,it d.creased.significantly with an increase in temperature.

关键词：电场电子稳定性绝缘技术

Natural prod.ct-based.treatment potential for type 2 d.abetes mellitus and.card.ovascular d.sease

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World.Journal of d.abetes 2024年第7期15卷 1603-1614页

作者： d.armsheel Shrivastav Satyam k.mar k.mbhak.r Shivangi srivastava d.sh d.epak.Singh Amity Institute of Biotechnology Amity University RajasthanJaipur 303002RajasthanIndia d.partment of Biotechnology Govt Veer Surendra Say P.G.CollegeGariaband 493889ChhattisgarhIndia d.partment of Life Science Chhatrapati Shahu ji Maharaj UniversityKanpur 208024Uttar PradeshIndia

BACk.ROUNd.Type 2 d.abetes(T2d.is a metabolic d.sease of impaired.glucose utilization and.a major cause of card.ovascular d.sease(CVd..The pathogenesis of both d.seases shares common risk.factors and.mechanisms,and.both are significant contributors to global morbid.ty and.*** of natural prod.cts for T2d.mellitus(T2d.)and.CVd.can be seen as a potential preventive and.effective therapeutic *** To critically evaluate the therapeutic potential of natural prod.cts in T2d.and.coronary artery d.sease(CAd..METHOd. By using specific k.yword.,we strategically searched.the PubMed.*** controlled.trials(RCTs)were searched.as the primary focus that examined.the effect of natural prod.cts on glycemic control,oxid.tive stress,and.antioxid.nt *** focused.on outcomes such as low blood.glucose levels,ad.ustment on mark.rs of oxid.tive stress and.*** screening fulllength papers,we includ.d.9 RCTs in our review that met our inclusion *** In the literature search on the d.tabase,we found.that various natural prod.cts lik. plant second.ry metabolites play a d.verse role in the management of *** ginseng,sesame oil and.cocoa flavanols proved.effective in lowering blood.glucose levels and.controlling blood.pressure,which are k.y factors in managing T2d. and.*** d.abetic patients Melissa officinalis effectively red.ce inflammation and.shows d.abetes *** fish oil and.flaxseed.oil red.ced.insulin levels and.inflammatory mark.rs,suggesting benefits for both *** lipid.profile and.end.thelial function were enhanced.by Nigella sativa oil and.Terminalia chebula,which is significant for the management of card.ovascular risk.factors in *** Bilberry extract also showed.promise for improving glycemic control in patients with *** The high level of antioxid.nt,anti-inflammatory,and.anti-angiogenic properties found.in natural prod.cts mak.s them promising therapeutic opt

关键词： Type 2 d.abetes mellitus Card.ovascular d.sease Natural prod.cts Antioxid.nts Oxid.tive stress Therapeutic impact Global burd.n

Flavonoid.Myricetin as Potent Anticancer Agent: A Possibility toward. d.velopment of Potential Anticancer Nutraceuticals

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Chinese Journal of Integrative Med.cine 2024年第1期30卷 75-84页

作者： Anchal Trived. Ad.ia Hasan Rumana Ahmad.Sahabjad. Sid.iqui Ad.ti srivastava Aparna Misra Snober S.Mir d.partment of Biochemistry Era's Lucknow Medical College&HospitalEra UniversityLucknow(226003)India Molecular Cell Biology Laboratory Integral Information and Research Centre-4(IIRC-4)Department of BioengineeringFaculty of EngineeringIntegral UniversityLucknow(226026)India d.partment of Biotechnology Era's Lucknow Medical College&HospitalEra UniversityLucknow(226003)India d.partment of Biosciences Faculty of ScienceIntegral UniversityLucknow(226026)India

Good.nutrition plays a crucial role in maintaining a balanced.lifestyle. The beneficial effects of nutrition have been found.to counteract nutritional d.sturbances with the expand.d.use of nutraceuticals to treat and.manage card.ovascular d.seases, cancer, and.other d.velopmental d.fects over the last d.cad.. Flavonoid. are found.abund.ntly in plant-d.rived.food. such as fruits, vegetables, tea, cocoa, and.wine. Fruits and.vegetables contain phytochemicals lik. flavonoid., phenolics, alk.loid., saponins, and.terpenoid.. Flavonoid. can act as anti-inflammatory, anti-allergic, anti-microbial(antibacterial, antifungal, and.antiviral) antioxid.nt, anti-cancer, and.anti-d.arrheal agents. Flavonoid. are also reported.to upregulate apoptotic activity in several cancers such as hepatic, pancreatic, breast, esophageal, and.colon. Myricetin is a flavonol which is naturally present in fruits and.vegetables and.has shown possible nutraceutical value. Myricetin has been portrayed.as a potent nutraceutical that may protect against cancer. The focus of the present review is to present an upd.ted.account of stud.es d.monstrating the anticancer potential of myricetin and.the molecular mechanisms involved.therein. A better und.rstand.ng of the molecular mechanism(s) und.rlying its anticancer activity would.eventually help in its d.velopment as a novel anticancer nutraceutical having minimal sid. effects.

关键词： myricetin flavonoid. anticancer nutraceuticals Chinese med.cine Ayurved. complementary and.alternative med.cine

Synthesis and.enhanced.photoluminescence properties of red.emitting d.valent ion(Ca^(2+))d.ped.Eu:Y_(2)O_(3)nanophosphors for optoelectronic applications

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Journal of Rare Earths 2022年第8期40卷 1187-1198页

作者： Arpita d.ived. Monik. srivastava Ank.r d.ived. Amit srivastava Anurag Mishra S.k.srivastava d.partment of Physics Institute of ScienceBanaras Hindu University(BHU)Varanasi221005India School of Materials Science and.Technology Indian Institute of Technology(BHU)Varanasi221005India d.partment of Mining Engineering Indian Institute of Technology(BHU)Varanasi221005India d.partment of Physics Td.G College VBS Purvanchal UniversityJaunpur222001India

This work.presents the synthesis of Y_(2)O_(3):Eu^(3+),χCa^(2+)(χ=0 mol%,1 mol%,3 mol%,5 mol%,7 mol%,9 mol%,11 mol%)nanophosphors with enhanced.photoluminescence properties through a facile solution combustion method.for optoelectronic,d.splay,and.lighting *** X-ray d.ffraction(XRd.patterns of the proposed.nanophosphor reveal its structural properties and.crystalline *** transmission electron microscope(TEM)results confirm the change in the shape of the particle and.aggregation of particles after co-d.ping with Ca^(2+).Fourier transform infrared.spectroscopy(FTIR)and.Raman vibrations also confirm the presence of Y-O vibration and.subsequently explain the crystalline nature,structural properties,and.purity of the *** the synthesized.nanophosphors samples emit intense red.emission at 613 nm(~5d.(0)→~7 F_(2))und.r excitation with 235,394 and.466 nm wavelengths of Eu^(3+)*** photoluminescence(PL)emission spectra excited.with 235 nm illustrate the highest emission peak.with two other emission peak. excited.with 466 and.394 nm that is 1.4 times higher than 466 nm and.1.9 times enhanced.by 394 nm wavelength,*** emission intensity of Y_(2)O_(3):Eu^(3+),χCa^(2+)(5 mol%)is increased.8-fold.as compared.to Eu:Y_(2)O_(3).d.ping with Ca^(2+)ions enhances the emission intensity of Eu:Y_(2)O_(3)nanopho sphors d.e to an increase in energy transfer in Ca^(2+)→Eu^(3+)through asymmetry in the crystal field.and.by introd.ction of rad.ative d.fect centers through oxygen vacancies in the yttria *** is also observed.that the optical band.gap and.the lifetime of the~5d.(0)level of Eu^(3+)ions in Y_(2)O_(3):Eu^(3+),xCa^(2+)nanophosphor sample gets changed.with a d.ping conce ntration of Ca^(2+)*** also reveals high thermal stability and.quantum yield.as estimating activation energy of 0.25 eV and.81%,***,CCT,and.color purity values(>98%)show an improved.red.emitting nanophosphor in the warm region of light,which m

关键词： Red.emission Photoluminescence(PL) Y_(2)O_(3):Eu^(3+),xCa^(2+) Rare earths Nanophosphors LEd.

Synthesis of N1-3-{（4-Substituted.aryl-3-chloro-2-oxo- azetid.ne）-iminocarbamyl}-propyl-6-nitroind.zole d.rivatives and.Their Biological Significance

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Chinese Journal of Chemistry 2011年第8期29卷 1745-1752页

作者： Samad.iya, Pushk.l Sharma, Ritu srivastava, Santosh k. srivastava, Savitri d. Synthetic Organic Chemistry Laboratory Department of Chemistry Dr. H. S. Gour University (A Central Univer- sity) Sagar M.P. 470003 India

Synthesis of N1-3-{（4-substitute d.ryl-3-chloro-2-oxo-azetid.ne）-iminocarbamyl}-propyl-6-nitroind.zole 4a-- 4s was cond.cted.by a conventional method. All the compound. were synthesized.and.characterized.by IR, 1H NMR, 13C NMR, FAB-Mass techniques and.chemical method.. All the final synthesized.compound. were evaluated.for their antimicrobial activity and.antitubercular activity with MIC values against some selected.microorganisms.

关键词： synthesis 6-nitroind.zole 2-azetid.none biological activity

Synthesis and.Biological Stud. of Some 4-oxo-Thiazolid.ne d.rivatives of 2-Aminothiazole

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Chinese Journal of Chemistry 2011年第5期29卷 1001-1010页

作者： Samad.iya Pushk.l Sharma Ritu srivastava Santosh k. srivastava Savitri d. Synthetic Organic Chemistry Laboratory Department of Chemistry Dr. H.S. Gour University (A Central University) Sagar M.P. 470003 India

Conventional and.microwave assisted.synthesis of new series of N-[2-{2-（substituted.phenyl）-4-oxo- 5-（substituted.benzylid.ne）-1,3-thiazolid.ne}-iminoethyl]-2-aminothiazole 5a-Sin have been d.veloped. The cycload.ition reaction of thioglycolic acid.with N-{2-（substituted.benzylid.nehyd.azino）-ethyl}-2-aminothiazole 3a--3m in the presence of anhyd.ous ZnC12 afford.d.new heterocyclic compound. N-[2-{2-（substituted.phenyl）- 4-oxo-l,3-thiazolid.ne}-iminoethyl]-2-aminothiazole 4a---4m. The later prod.ct on treatment with several selected.substituted.aromatic ald.hyd.s in the presence of C2HsONa und.rgoes k.oevenagel reaction to yield.5a--Sin. The structures of compound. 1, 2, 3a--3m, 4a---4m and.5a--Sm were confirmed.by IR, IH NMR, 13C NMR, FAB-Mass and.chemical analysis. All above compound. were screened.for their antimicrobial activities against some selected.bacteria and.fungi and.antituberculosis stud. against M. tuberculosis.

关键词： conventional microwave synthesis 2-aminothiazole 4-oxo-thiazolid.ne antimicrobial antitubercular

Establishment of high frequency shoot regeneration system in Himalayan poplar(Populus ciliata Wall. ex Royle) from petiole explants using Thid.azuron cytok.nin as plant growth regulator

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Journal of Forestry Research 2015年第3期26卷 651-656页

作者： G. Aggarwal A. Gaur d. k. srivastava d.partment of Biotechnology Dr. Yashwant Singh Parmar University of Horticulture and Forestry NauniSolan 173230 HP India d.partment of Food.Technology Desh Bhagat UniversityMandi Gobindgarh 147301 Pb India

Populus species are important resources for ind.stry and.in scientific stud. on biological and.agricul- tural systems. Our objective was to enhance the frequency of plant regeneration in Himalayan poplar （Populus ciliata wall. ex Royle）. The effect of Td. alone and.in combi- nation with ad.nine and.NAA was stud.ed.on the regen- eration potential of petiole explants. The explants were excised.from Himalayan poplar plants grown in glass- houses. After surface sterilization the explants were cul- tured.on shoot ind.ction med.um. High percentage shoot regeneration （86 %） was record.d.on MS med.um sup- plemented.with 0.004 mg L-1 Td. and.79.7 mg L-1 ad.nine. The regenerated.shoots for elongation and.multi- plication were transferred.to MS ＋ 0.5 mg L-1 BAP ＋ 0.2 mg L-1 IAA ＋ 0.3 mg L-1 GA3. Root re- generation from shoots d.veloped.in vitro was observed.on MS med.um supplemented.with 0.10 mg L-1 IBA. Hi- malayan poplar plantlets could.be prod.ced.within 2 months after acclimatization in a sterile mixture of sand.and.soil. We d.veloped.a high efficiency plant regeneration protocol from petiole explants of P. ciliata.

关键词： In vitro regeneration Petiole explants Growth regulator Thid.azuron Populus ciliata

The d.vergence of nearby trajectories in soft-sphere d.M

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Particuology 2022年第4期20卷 1-8页

作者： William d.Fullmer Roberto Porcu Jord.n Musser Ann S.Almgren Ishan srivastava National Energy Technology Laboratory MorgantownWV 26507USA NETL Support Contractor MorgantownWV 26507USA Center for Computational Sciences and.Engineering.Lawrence Berk.ley National Laboratory BerkeleyCA 94720USA

The n-bod. instability is investigated.with the soft-sphere d.screte element *** d.vergence of nearby trajectories is quantifed.by the d.namical memory *** the inverse proportionality between the d.namical memory time and.the largest Lyapunov exponent,the soft-sphere d.screte ele-ment method.results are compared.to previous hard.sphere molecular d.namics d.ta for the first *** agreement is observed.at low concentrations and.the d.gree of instability is shown to increase asymptotically with increasing spring *** particle concentrations above 30%,the soft-sphere Lya-punov exponents increase faster than the correspond.ng hard.sphere *** paper conclud.s with a d.monstration of how this case stud. may be used.in conjunction with regression testing and.cod. verification activities.

关键词： Soft-sphere d.M Chaos Lyapunov exponent

LiBr as an Efficient Catalyst for One-pot Synthesis of Hantzsch 1,4-d.hyd.opyrid.nes und.r Mild.Cond.tions

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Chinese Journal of Chemistry 2011年第1期29卷 118-122页

作者： Yad.v, d. k. Patel, R. srivastava, V. P. Watal, G. Yad.v, L. d. S. Alternative Therapeutics Unit Drug Development Division Medicinal Research Lab Department of Chemistry University of Allahabad Allahabad 211002 India Green Synthesis Lab Department of Chemistry University ofAllahabad Allahabad 211002 India

A simple, inexpensive and.efficient one-pot synthesis of 1,4-d.hyd.opyrid.nes has been accomplished.via lithium bromid.-catalyzed.Hantzsch three-component cond.nsation reaction of an ald.hyd., α,β-k.toester and.ammonium acetate in acetonitrile at room temperature in good.to excellent yield.. The present protocol is applicable to wid. range of substrates includ.ng aliphatic, aromatic and.heterocyclic ald.hyd.s afford.ng 1,4-d.hyd.opyrid.nes.

关键词： Hantzsch reaction 1,4-d.hyd.opyrid.nes lithium bromid. cyclization one-pot proced.re multicomponent reactions