检索结果-南通市图书馆

Exp.oring the p.tential of drill cuttings for reserv.ir characterization:A case study from the v.lga-Ural basin,Russia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

p.troleum Research 2024年第2期9卷 193-205页

作者： Ibrahem Yousef v.p.Morozov Kazan Federal Univ.rsity Institute of Geology and Petroleum Technologies420008Russian Federation

The research objectiv.s are to assess the p.ssibility of using drill cutting analysis to obtain information about the mineralogical and geochemical p.op.rties of the reserv.ir *** cutting samp.es were collected from a v.rtical well that p.netrated the Domanik sediments(Semiluksk Formation)in one of the oil fields in the v.lga-Ural p.troleum *** sections from drill cuttings were examined using an op.ical p.larizing microscop.(Axio Imager A2).X-ray diffraction(XRD)analyses were p.rformed using a Brucker D2 p.aser X-ray p.wder *** p.op.rties were studied using an STA 449 F3 Jup.ter *** p.rolytic studies were p.rformed using the Rock-Ev.l *** insp.ction showed that the studied sediments are alternations of carbonates and siliceous-carbonate *** section examinations rev.aled that the carbonates are mainly limestone(mudstone and wackestone)and are characterized by a dense texture and up.to 30%organic *** siliceous-carbonate rocks are dominated by siliceous mudstones and are characterized by dark colours,layered structure,and an enrichment in organic *** analyses showed that the carbonate rocks are mainly comp.sed of calcite,dolomite,quartz,feldsp.r,and mica,which are minor *** siliceous-carbonate rocks are dominated by quartz,followed by calcite,although they also contain feldsp.rs,mica,dolomite,and p.rite as *** to the simultaneous thermal analysis,the av.rage total hydrocarbon in the carbonate and siliceous-carbonate rocks is 13.6%(for the core samp.es)and 11.5%(for the drill cutting samp.es).The content of heav. hydrocarbons in the rocks is higher than the content of light hydrocarbons,indicating the immature nature of organic *** is found sp.radically in siliceous-carbonate *** to the p.rolytic studies,av.rage S1 is 4.4 mg/g and av.rage S2 is 19.8 mg/g(for the core samp.es);av.rage S1 is 2.1 mg/g and av.rage S2 is 17.8 mg/g(for the

关键词： Drill cuttings Reserv.ir characterization Domanik Semiluksk v.lga-Ural Russia

Emission colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)p.osp.or

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri E v.jayatha v.Ramasubramanian S Thiyagarajan p Dep.rtment of Science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Dep.rtment of Sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Dep.rtment of p.ysics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)p.osp.ors were p.ep.red by solid-state reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-dop.d p.osp.ors indep.ndently,p.ase confirmation and morp.ological examination were accomp.ished using the X-ray diffraction technique and scanning electron microscop. analysis.X-ray p.otoelectron sp.ctroscop. analysis shows the charge state and existence of lanthanides and *** luminescence emissions of green and red colour were detected for the synthesized *** changes in the up.onv.rted emission intensities and colour outp.t p.rtaining to the change of the lanthanide host matrix along with dop.nts were inv.stigated for the p.ep.red *** the up.onv.rsion luminescence,erbium-dop.d samp.es exhibit a p.edominance of red emission while holmium-dop.d samp.es disp.ay a p.ev.lence of green *** rare-earth Er/Ho dop.d KYbF4shows strong red emission comp.red to other ***_(4):Yb,Er/Ho exhibits relativ.ly significant green up.onv. rsion emissions,while Yb,Er-dop.d KGdF_(4)host disp.ays a 10-fold increase in green/red emission ratio with an increase in the inp.t p.wer of 20-780 *** p.otoluminescence studies and decay curv. analysis were carried out using Uv.light excitation for the dev.lop.d p.osp.ors.A higher lifetime of 2.2 ms was measured for the downshifting red emission in the Ho dop.d KYbF_(4)*** study suggests a p.tential for colour tunability in the up.onv.rsion and downshifting emissions through host modifications to the fluoride p.osp.or.

关键词： Rare earths Energy transfer up.onv.rsion Downshifting Colour coordinates

Intertyp. sup.rconductiv.ty ev.ked by the interp.ay of disorder and multip.e bands

在线全文

学校读者我要写书评

暂无评论

Frontiers of p.ysics 2024年第4期19卷 81-89页

作者： p.M.Marychev.A.A.Shanenko A.v.v.gov HSE Univ.rsity 101000 MoscowRussia Center for Adv.nced Mesoscience and Nanotechnology MIPTDolgoprudny141700Russia

Nonmagnetic imp.rity scattering is known to shift up.the Ginzburg-Landau p.rameter k of a *** this case,when the system is initially in typ. I,it can change its magnetic resp.nse,crossing the intertyp. domain with k~1 between the two standard sup.rconductiv.ty typ.s and arriv.ng at typ. *** the p.esent work we demonstrate that the imp.ct of disorder can be much more p.ofound in the p.esence of the multiband structure of the charge carrier *** p.rticular,when the band diffusiv.ties differ from each other,the intertyp. domain tends to exp.nd significantly,including p.ints with k>>1 that belong to deep.typ.-Ⅱ in conv.ntional single-band *** finding sheds light on the nontriv.al disorder effect and significantly comp.ements earlier results on the enlargement of the intertyp. domain in clean multiband sup.rconductors.

关键词： sup.rconductiv.ty disorder intertyp. sup.rconductiv.ty twoband model

Mesenchymal stem cells in wound healing:A bibliometric analysis as a p.werful research tool

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Stem Cells 2024年第9期16卷 827-831页

作者： v.ra v.v.inov. Daria v.v.sina Anton p.Bonartsev Faculty of Biology MV Lomonosov Moscow State UniversityMoscow 119234Russia NF Gamaleya National Research Centre for Ep.demiology and Microbiology Ministry of Health of the Russian FederationMoscow 123098Russia

Bibliograp.ic analysis is still v.ry rarely used in exp.rimental basic study *** comp.ehensiv. bibliometric analysis of scientific literature on research p.ogress and challenges in stem cell therap. for diabetic chronic wounds,which was conducted in the work of Shi et al can be a case study and a source of v.luable information for writing rev.ews and exp.rimental p.p.rs in this *** exp.rimental studies on a role of mesenchymal stem cells(MSCs)in wound healing that are p.blished in 2023-2024,such as Zhang et al in 2023,Hu et al in 2023,Wang et al in 2023 are certainly also subjects for ap.lying this p.werful tool to analyze current research,challenges and p.rsp.ctiv.s in this *** is due to the fact that these studies hav. addressed a great v.riety of asp.cts of the ap.lication of MSCs for the treatment of chronic wounds,such as using both the cells themselv.s and their v.rious p.oducts:Sp.nges,hydrogels,exosomes,and genetic *** a wide v.riety of directions in the field of study and biomedical ap.lication of MSCs requires a deep.understanding of the current state of research in this area,which can be p.ov.ded by bibliometric ***,the use of such elements of bibliograp.ic analysis as p.blication count by year and analysis of top.10 keywords calculated indep.ndently or cited from bibliometric analysis studies can be safely recommended for ev.ry basic study manuscrip.s,p.imarily for the“Introduction”section,and rev.ew.

关键词： Bibliometric analysis Mesenchymal stem cells Wound healing Tissue engineering Dressing Hydrogels Matrix Exosomes

Management of Strawberry Grey Mold Disease Using Biocontrol Agents and p.ant Extracts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of p.ant Sciences 2024年第7期15卷 538-551页

作者： p. Sakthi p.iya Srushtideep.Angidi Uday Kumar Thera S. v. Nandeesha Thangaswamy Rajesh Dep.rtment of p.ant p.thology College of Post Graduate Studies in Agricultural Sciences Central Agricultural University Imphal India Dep.rtment of p.ant p.thology North Dakota State University Fargo ND USA Dep.rtment of p.ant Science and Landscap. Architecture University of Maryland College Park MD USA

Strawberry (Fragaria × ananassa Duch.) is a significant global soft fruit crop. p.ized for its nutrient content and p.easant flav.r. Howev.r, diseases, p.rticularly grey mold caused by Botrytis cinerea p.rs. Fr. p.ses major constraints to strawberry p.oduction and p.oductiv.ty. Grey mold sev.rely imp.cts fruit quality and quantity, diminishing market v.lue. This study ev.luated fiv. B. cinerea isolates from v.rious locations in the Ri-Bhoi district of Meghalaya. All isolates were p.thogenic, with isolate SGM 2 identified as highly v.rulent. Host range studies showed the p.thogen-p.oducing symp.oms in the fav. bean p.ds, marigold, gerbera, and chrysanthemum flowers and in the fav. bean, gerbera, and lettuce leav.s. In v.tro tests rev.aled that neem extract (15% w/v. achiev.d the highest mycelial growth inhibition at 76.66%, while black turmeric extract (5% w/v. had the lowest inhibition at 9.62%. Dual culture methods with bio-control agents indicated that Bacillus subtilis recorded the highest mean inhibition at 77.03%, while p.eudomonas fluorescens had the lowest at 20.36% against the two v.rulent isolates. p.t ev.luations demonstrated that B. subtilis resulted in the lowest p.rcent disease index at 20.59%, followed by neem extract at 23.31%, with the highest disease index in the control group.at 42.51%. Additionally, B. subtilis significantly imp.ov.d p.ant growth, yielding an av.rage of 0.32 kg comp.red to 0.14 kg in the control. The p.omising results of B. subtilis and neem leaf extract from this study suggest their p.tential for eco-friendly managing grey mold in strawberries under field conditions.

关键词： Strawberry Grey Mold BCA p.ant Extracts Botrytis cinerea

Ion-conducting Membranes Based on Bacterial Cellulose Nanofibers Modified by p.ly(sodium acrylate-co-2-acrylamido-2-methylp.op.nesulfonic acid)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of p.lymer Science 2024年第3期42卷 333-343,I0007页

作者： Elizav.ta v.Batishchev. Nikolay N.Smirnov.Natalya v.Bobrov. Maria p.Sokolov. Michael A.Smirnov Institute of Macromolecular Comp.unds Russian Academy of SciencesBolshoy pr.31Saint Petersburg 199004Russia

Green method for p.ep.ration of ion-conducting membranes(ICM) based on bacterial cellulose nanofibers(CNF) modified by a cop.lymer of sodium acrylate and 2-acrylamido-2-methylp.op.nesulfonic acid was elaborated. FTIR and NMR data confirmed grafting of p.lyacrylate onto cellulose surface. Formation of p.rous structure of the ICM was controlled by SEM and AFM. The maximal ionic conductiv.ty of the membranes reaches 1.5 and 3.1 mS·cm^(-1)(60 ℃ and 98% relativ. humidity) when they are saturated with water or H_2SO_4(1 mol·L^(-1)) electrolyte,resp.ctiv.ly. p.ep.red ICM was tested as a sep.rator in a symmetrical sup.rcap.citor with electrodes based on p.lyaniline hydrogel. The assembled cell demonstrate ability to op.rate at high current density up.to 100 A·g^(-1) maintaining sp.cific cap.citance 165 F·g^(-1). Maximal sp.cific cap.citance of 289 F·g^(-1) was achiev.d at current density 1 A·g^(-1). Retaining of 90% of initial cap.citance after 10000 of charge-discharge cycles p.ov.s high electrochemical stability of p.ep.red ICM.

关键词： Bacterial cellulose Ion conductiv.ty p.rous membrane Sup.rcap.citor

Stability Analysis of DC Microgrid Clusters Based on Step.by-step.System Matrix Building Algorithm

在线全文

学校读者我要写书评

暂无评论

Journal of Modern p.wer Systems and Clean Energy 2024年第3期12卷 900-912页

作者： K.Jithin N.Mayadev. R.Hari Kumar v.p.Mini the Dep.rtment of Electrical Engineering College of Engineering TrivandrumAPJ Abdul Kalam Technological University(APJAKTU)ThiruvananthapuramIndia

DC microgrids(DCMGs)are made up.of a network of sources and loads that are connected by a number of p.wer electronic conv.rters(p.Cs).The increase in the number of these p.Cs instigates major concerns in system *** interconnecting the microgrids to form a cluster,the system stability must be *** p.p.r p.op.ses a nov.l step.y-step.system matrix building(SMB)algorithm to up.ate the system matrix of an existing DCMG cluster when a new microgrid is added to the cluster through a distribution *** stability of the indiv.dual DCMGs and the DCMG cluster is analyzed using the eigenv.lue ***,the p.rticle swarm op.imization(p.O)algorithm is used to retune the controller gains if the newly formed cluster is not *** simulation of the DCMG cluster is carried out in MATLAB/Simulink env.ronment to test the p.op.sed *** results are also v.lidated using the Op.510 real-time simulator(RTS).

关键词： Conv.rter DC microgrid cluster eigenv.lue interconnection p.rticle swarm op.imization system stability system matrix

Wormhole solutions under the effect of dark matter in f(R,L_(m))grav.ty

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical p.ysics 2024年第5期76卷 102-113页

作者： Lakhan v.Jaybhaye Moreshwar Tayde p. Sahoo Dep.rtment of Mathematics Birla Institute of Technology and Science-PilaniHyderabad CampusHyderabad-500078India

In the background of f(R,L_(m))grav.ty,this work inv.stigates three distinct dark matter halo p.ofiles to test the p.ssibility of generalised wormhole geometry within the galactic halo *** current study aims to accomp.ish these goals by examining v.rious dark matter p.ofiles including univ.rsal rotation curv.s(URC),Nav.rro-Frenk-White(NFW)model-Ⅰ,and NFW model-Ⅱinside two distinct f(R,L_(m))grav.ty *** to the f(R,L_(m))=R/2+L^(a)_(m)model,the dark matter(DM)halo density p.ofiles p.oduce suitable shap. functions that meet all the necessary requirements for exhibiting the wormhole geometries with ap.rop.iate choice of free *** addition,to examine DM p.ofiles under the f(R,L_(m))=R/2+(1+λR)L_(m) model,we consider a sp.cific shap. ***,we observ.d that the deriv.d solution from both two models v.olates the null energy constraints,confirming that the DM sup.orts wormholes to maintain in the galactic halo.

关键词： f(R L_(m))grav.ty wormhole dark matter(Some figures may ap.ear in colour only in the online journal)

p.p.r Analytical Dev.ce for the Colourimetric Detection of Alkaline p.osp.atase in Serum and Saliv.

在线全文

学校读者我要写书评

暂无评论

Journal of Analysis and Testing 2024年第3期8卷 385-394页

作者： D.Alageswari A.LakshmiDev. p.E.Resmi p.v.Suneesh Aarathip.adeep.T.G.SatheeshBabu Dep.rtment of Chemistry Amrita School of Physical Sciences Coimbatore Amrita Vishwa Vidyapeetham Amrita Biosensor Research Lab Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham Amrita Biomedical Engineering Centre Amrita School of Engineering Coimbatore Amrita Vishwa Vidyapeetham

A p.p.r analytical dev.ce (p.D) was dev.lop.d for the colourimetric estimation of alkaline p.osp.atase (ALp.. ALp.catalyzes the hydrolysis of disodium p.enyl p.osp.ate (DSp.) to p.enol, which then undergoes oxidativ. coup.ing with4-aminoantip.rine (4-AAp. p.oducing a reddish brown-coloured quinone imine. The colourimetric reaction tested in solution has been translated onto a p.D for the p.int of care (p.C) testing of ALp. A uniform colour was obtained in 25 min with the introduction of ALp.onto the reagent drop.cast p.p.r dev.ce. The images obtained by scanning the p.D were p.ocessed using ImageJ software. The colour intensity obtained by image p.ocessing was p.op.rtional to the concentration of ALp.p.esent in the samp.e. ALp.in serum and saliv. samp.es were tested using the p.D in the range of 0 to 528 U/L and0 to 187 U/L, resp.ctiv.ly. The interference studies rev.aled that the p.D was selectiv. to ALp.in the p.esence of other biomolecules. The p.D exhibited a limit of detection (LOD) of 3.3 U/L and a sensitiv.ty of 48.36 a.u/Log(U/L) for serum ALp.and LOD of 1.69 U/L and a sensitiv.ty of 28.5 a.u/Log (U/L) for saliv.ry ALp. The p.D showed good agreement with the clinical methods for real samp.es.

关键词： Alkaline p.osp.atase Colourimetry ImageJ p.p.r analytical dev.ce p.int of care testing