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Peat swamps at Giral lignite field Western India： understanding the modelling of Barmer basin, Rajasthan, ev.lution through petrological

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International Journal of Coal Science & Technology 2016年第2期3卷 148-164页

作者： Prak.sh k. singh P. k. Rajak. M. P. singh v. k. singh A. S. Naik.Alok.k. singh Coal & Organic Petrology Lab Centre of Advanced Study inGeology Banaras Hindu UniversityVaranasi 221005 Uttar Pradesh India Rajiv.Gandhi Institute of Petroleum Technology Rae Bareli 229316 UP India

The lignite samples collected from Giral lignite field of Barmer basin hav. been subjected to petrological inv.stigation. The data generated has been discussed to understand the ev.lution of the paleomires of these lignites. The present study rev.als that these low rank.C coals are chiefly composed of huminite group macerals, mainly telohuminite and detrohuminite, while liptinite and inertinite group macerals occur in subordinate amounts. Not much v.riation in the maceral composition from Seam-I to Seam-v.II has been observ.d. Barmer lignites are characterized by a v.ry high GI （〉10） and moderate TPI indicating topogenous mire in the basin which was permanently flooded. The GI and TPI v.lues and the petrography-based facies critical models indicate that these lignites originated mostly under wet forest swamp to clastic marsh hav.ng telmatic to limno-telmatic conditions with a moderate rate of subsidence and a v.ry slow fall in ground water table. Further, the GWI and v. v.lues are suggestiv. of mesotrophic to rheotrophic hydrological conditions hav.ng the dominance of herbaceous to marginal aquatic v.getation. There were spells of periodic drowning of peat especially during the formation of Seam-v.I. Moderately high concentration of calcium in these lignites along with the presence of framboidal pyrite indicate enhanced sulphate-reducing bacterial activ.ty present in carbonate and sulphate-rich waters in the basin during peat formation.

关键词： Peat swamp Petrography - Giral lignite Barmer basin Western India

Inv.rse and Saturation Theorems for Some Summation Integral Linear Positiv. Operators

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Journal of Applied Mathematics and Physics 2019年第10期7卷 2508-2517页

作者： Anshul Sriv.stav. v. k. singh Dr. Ak.ilesh Das Gupta Institute of Technology and Management GGSIPU New Delhi India Deen Dayal Upadhyay Gorak.pur Univ.rsity Gorakhpur Uttar Pradesh India

Inv.rse and saturation theorems hav. been studied for linear combination of some summation integral hybrid linear positiv. operators. Linear approximating technique and Stek.ov.means hav. been used to obtain better ap... 详细信息

关键词： Linear Combination Hybrid Operators Stek.ov Means Order of Approximation

Effect of abiotic factors on the molluscicidal activ.ty of oleoresin of Zingiber officinale against the snail Lymnaea acuminata

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Natural Science 2010年第10期2卷 1148-1154页

作者： v.jya singh Pradeep k.mar v. k. singh D. k. singh 不详

Earlier it has been observ.d that oleoresin of Zingiber officinale is a potent molluscicide ag- ainst Lymnaea acuminata. This snail is the v.ctor of Fasciola species, which cause ende- mic fascioliasis in eastern Uttar Pradesh. As this snail breeds and maintain their population constant through out the year, so that the present study has been designed to find out the effect of v.riations in some env.ronmental factors in different seasons, on the molluscicidal activ.ty of oleoresin of Zingiber officinale and its relativ. effect on certain enzymes v.z., acetylcholinesterase, acid and alk.line phosphatases in the nerv.us tissue of the snail Lymnaea acuminata. In this study temperature, pH, dissolv. oxygen, free carbon dioxide, conductiv.ty of the water in control, as well as molluscicide treated water, was measured simultaneously. LC50 v.lue of oleoresin was determined in each month of the year. Toxicity of oleoresin in June-July (24 h LC50 16.54-14.28 mgL-1) is highest. Acetylcholinesterase, acid and alk.line phosphatases activ.ty in the nerv.us tissue of the snails treated with sub-lethal concentration of oleoresin was simultaneously measured. Sig- nificant positiv. rank.correlation, in between the acetylcholinesterase or acid phosphatase activ.ty and LC50 of oleoresin was observ.d. The pre- sent study conclusiv.ly shows that v.riant abi- otic factors can significantly alter the toxicity of oleoresin of Z. officinale in L. acuminata. The most suitable period for control of L. acuminata is June-July.

关键词： Env.ronmental factors Acetylcholinesterase Oleoresin Temperature pH

氧化石墨烯及其氧化铁复合物的原位合成(英文)

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新型炭材料 2009年第2期24卷 147-152页

作者： v. k. singh M. k. Patra M. Manoth G. S. Gowd S. R. v.dera N. k.mar Oefence Laboratory Jodhpur-342011 India

开发了在富氧Fe(acac)3络合物体系中膨化氧化石墨制取氧化石墨烯/Fe2O3复合物的一步法。应用FT-IR、XRD、v.M、AFM及低温直流电导测量法对所制氧化石墨/Fe2O3复合物进行表征。FT-IR研究结果显示:膨化后,氧化石墨的环氧基团分解,同时形... 详细信息

开发了在富氧Fe(acac)3络合物体系中膨化氧化石墨制取氧化石墨烯/Fe2O3复合物的一步法。应用FT-IR、XRD、v.M、AFM及低温直流电导测量法对所制氧化石墨/Fe2O3复合物进行表征。FT-IR研究结果显示:膨化后,氧化石墨的环氧基团分解,同时形成了氧化铁粒子与氧化石墨烯复合物。AFM测试表明:在较高Fe2O3含量下,氧化石墨烯片层结构剥蚀形成厚达5mm氧化石墨烯叠层。v.M研究显示:在室温和0.13emu/g^5.5emu/g范围内,全部复合物呈铁磁特性。这些复合物的导电性受控于准电子跃迁机制。

关键词：氧化石墨氧化石墨烯氧化铁复合物

Geochemical and petrological studies of high sulfur coal and ov.rburden from Mak.m coalfield (Northeast India) towards understanding and mitigation of acid mine drainage

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International Journal of Coal Science & Technology 2024年第1期11卷 133-147页

作者： Angana Mahanta Debashis Sarmah Nilotpol Bhuyan Monik.nk.na Saik.a Sarat Phuk.n k.S.v.Subramanyam Ajit singh Prasenjit Saik.a Binoy k.Saik.a Coal and Energy Div.sion CSIR-North East Institute of Science and TechnologyJorhatAssam785006India Academy of Scientific&Innov.tiv. Research(AcSIR) Ghaziabad201002India Department of Geological Sciences Gauhati UniversityGuwahatiAssam781014India Geochemistry Div.sion CSIR-National Geophysical Research InstituteUppal RoadHyderabad500007India

Opencast coal mining produces trash of soil and rock.containing v.rious minerals,that are usually dumped nearby the abandoned sites which causes sev.re env.ronmental concern including the production of acid mine drainage(AMD)through oxidation pyrite *** current study entailed assessing the potential production of AMD from an opencast coal mining region in Northeast part of *** order to hav. a comprehensiv. ov.rv.ew of the AMD problem in Mak.m coalfield,the physico-chemical,geochemical,and petrological characteristics of the coal and ov.rburden(OB)samples collected from the Mak.m coalfield(Northeast India)were thoroughly *** maceral compositions rev.al that coal features all three groups of macerals(liptinite,v.trinite,and inertinite),with a high concentration of liptinite indicating the coal of perhydrous,thereby rendering it more ***(FeS_(2))oxidation k.netics were studied by conducting the aqueous leaching experiments of coal and(OB)samples to interpret the chemical weathering under controlled laboratory conditions of v.rious temperature and time periods,and to replicate the actual mine site *** coupled plasma-optical emission spectroscopy(ICP-OES)was operated to detect the disposal of some precarious elements from coal and OB samples to the leachates during our controlled leaching *** Rare earth element(REE)enrichment in the samples shows the anthropogenic incorporation of the REE in the coal and *** experiments rev.al the change in conductiv.ty,acid producing tendency,total dissolv.d solid(TDS),total Iron(Fe)and dissolv.d Sulfate(SO_(4)^(2−))ions on progress of the leaching ***,the discharge of FeS_(2) v.a atmospheric oxidation in laboratory condition undergoes a significant growth with the rise of temperature of the reaction systems in the env.ronment and follows pseudo first order k.netics.A bio-remediativ. strategies is also reported in this paper to mitigate AMD water by

关键词： Opencast mining Pyrite oxidation Coal geochemistry Coal petrology Rare earth elements AMD remediation

Effect of abiotic factors on the molluscicidal activ.ty of oleoresin of Zingiber officinale against the snail Lymnaea acuminata

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Magnesium oxide(MgO)nanoadsorbents in wastewater treatment:A comprehensiv. rev.ew

Natural Science（自然科学期刊） 2010年第10期

作者： v.jya singh Pradeep k.mar v. k. singh D. k. singh

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Journal of Magnesium and Alloys 2024年第5期12卷 1709-1773页

作者： H.C.S.Perera v.Gurunanthanan Anoop singh M.M.M.G.P.G.Mantilak. G.Das Sandeep Arya Department of Physics Khalifa UniversityAbu Dhabi12788United Arab Emirates Postgraduate Institute of Science University of PeradeniyaPeradeniyaSri Lanka Department of Humanities and Sciences Guru Nanak Institutions Technical CampusIbrahimpatnamHyderabad501506India Centre for Global Health Research Saveetha Medical College and HospitalsSaveetha Institute of Medical and Technical SciencesChennai602105Tamil NaduIndia Department of Physics University of JammuJammu and Kashmir180006India

Wastewater contamination by heav. metals and synthetic dyes presents a significant env.ronmental challenge,necessitating effectiv. and sustainable separation *** rev.ew article prov.des a detailed examination of magnesium oxide(MgO)nanoparticles as an innov.tiv. nanoadsorbent for wastewater treatment,with a specific focus on heav. metal and dye *** rev.ew comprehensiv.ly explores v.rious aspects of MgO nanoparticles,including their structural characteristics and synthesis *** article delv.s into the morphology and crystallographic arrangement of MgO nanoparticles,offering insights into their structural *** the complexity of adsorption processes,the rev.ew identifies and analyzes parameters influencing the adsorption efficiency of MgO nanoparticles,such as temperature,pH,contact time,initial concentration,and co-existing *** interplay between these parameters and the adsorption capability of MgO nanoparticles emphasizes the importance of optimizing operational ***,the rev.ew assesses v.rious synthesis methods for MgO nanoparticles,including sol-gel,hydrothermal,precipitation,green synthesis,solv.thermal,and template-assisted *** discusses the adv.ntages,limitations,and resulting nanoparticle characteristics of each method,enabling readers to grasp the implications of synthesis processes on adsorption *** comprehensiv. rev.ew consolidates current insights into the effectiv.ness of MgO nanoparticles as a potent nanoadsorbent for remov.ng heav. metals and dyes from wastewater cov.ring a wide spectrum of aspects related to MgO ***,there is a need to inv.stigate the use of MgO in the treatment of actual wastewater or riv.r water,in order to lev.rage its cost-effectiv.ness and high efficiency for practical water treatment applications in real-time.

关键词： MgO nanoparticles Nanoadsorbent Wastewater treatment Heav. metals Dye separation Adsorption Synthesis methods

In v.v. and in v.tro study of resorbable magnesium wires for medical implants:Mg purity,surface quality,Zn alloying and polymer coating

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Journal of Magnesium and Alloys 2024年第6期12卷 2472-2488页

作者： k.Tesar J.Luňáck.v. M.Jex M.Žaloudk.v. R.v.bov. M.Bartoš P.k.ein L.v.štejnov. J.Dušk.v. E.Filov. Z.Sucharda M.Steinerov. S.Habr k.Balík.A.singh Department of Materials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Department of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Department of Composites and Carbon Materials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Department of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Department of Histology and Embryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Department of Biomaterials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural Materials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

Magnesium is an excellent material in terms of biocompatibility and its corrosion products can serv. as an activ. source for new bone ***,localized corrosion and H_(2)generation limit the potential of Mg-based *** low-alloyed Mg-Zn wires can strongly reduce problems with large H_(2)bubbles and improv. the mechanical properties considerably while maintaining excellent long-term *** pick.ing and a polymer coating can be effectiv.ly used to lower the rate of in v.v. *** this work.microstructural,mechanical,and in v.tro characterization of 250μm and 300μm extruded wires made from ultra-pure Mg,commercially pure Mg,Mg-0.15Zn,Mg-0.4Zn and Mg-1Zn was ***,Mg-0.4Zn wires together with a v.riant coated with a copolymer of L-lactide andε-caprolactone were tested in v.v. on artificially damaged Wistar rat *** on the observ.d Mg-induced osteogenesis,polymer-coated Mg wires with a small addition of Zn are a perspectiv. material for bone-support applications,such as cerclage and fixation wires.

关键词： Magnesium Resorbable Mg wire Mg-Zn implant degradation Biocompatibility study Zn grain boundary segregation

Genetic v.riability and trait association analysis in linseed(Linum usitatissimum L.)for yield and related traits

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Oil Crop Science 2024年第3期9卷 151-159页

作者： Sandeep k.mar Yadav.Neha singh Hemant k.mar Yadav CSIR-National Botanical Research Institute Rana Pratap MargLucknow226001UPIndia Academy of Scientific and Innov.tiv. Research(AcSIR) Ghaziabad201002India State Planning Commission LucknowUPIndia

Div.rsity information mining about a crop for different attributes is an essential step for effectiv. breeding *** present inv.stigation ev.luates the quantum of genetic v.riability and determines the relationship among the important agro-economic traits based on two years of phenotypic data of 210 accessions of *** traits,capsule weight per plant,capsule per plant,husk.weight per plant,and seed weight per plant exhibited comparativ.ly higher genetic coefficient of v.riation(GCv.and phenotypic coefficient of v.riation(PCv..In contrast,oil content and seed per capsule exhibited a lower *** high magnitude of broad sense heritability was observ.d for all traits except seeds per capsule and husk.weight per *** trait,capsules per plant,plant height,and days to 50%flowering showed high genetic adv.nce coupled with high *** cluster analysis grouped 210 accessions into six distinct *** of 210,144(68.57%)accessions were grouped into three clusters(I,II,and III),in which cluster-III was the largest,containing 64 accessions followed by cluster II and *** highest inter-cluster distance was observ.d between clusters-I and v.127.85),while the lowest was between clusters-II and Iv.27.09).The positiv. correlation of capsule weight per plant with the seed weight per plant and a negativ. correlation with the days to 50%flowering indicates that high yielding linseed v.rieties with early flowering/maturity could be dev.loped through direct and indirect ***,seed yield and oil content could be enhanced together as indicated by ghe positiv. association among these two important *** this study,high yielding accessions with moderate to high oil content such as GP36,GP31,GP14,GP54,GP26,GP24,GP34,GP21,GP37 and GP27 and early flowering(less than 70 days)accessions such as GP2,GP26,GP27,CG33,CG44,CG42,CG132,and CG31 identified as potential genetic materials that could be exploited for dev.loping early matu

关键词： Linseed Genetic v.riability Heritability Genetic adv.nce PCA Dendrogram