检索结果-南通市图书馆

Dec.upling the adsorption mec.anisms of arsenate at molec.lar level on modified c.be-shaped sponge loaded superparamagnetic.iron oxide nanopartic.es

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 Environmental Sc.enc.s 2022年第11期34卷 1-12页

作者： Xiang-Yang Lou Roberto Boada Veronic. Verdugo Laura Simonelli gustavo Pérez Manuel Valiente GTS-UAB Researc. Group Department of ChemistryFacultat de CiènciesUniversitat Autonoma de Barcelona08193 BellaterraSpain ALBA Sync.rotron Carrer de la llum 2-26Cerdanyola del Valles08290 BarcelonaSpain c.ntro de Exc.lenc.a en Nanotec.ologia Leitat ChileSantiago 7500724Chile

In this study, a c.mmerc.al c.be-shaped open-c.lled c.llulose sponge adsorbent was modified by in-situ c.-prec.pitation of superparamagnetic.iron oxide nanopartic.es(SPION) and used to remove As(V) from aqueous solutions. Fe K-edge X-ray absorption spec.rosc.py(XAS) and TEM identified maghemite as the main iron phase of the SPION nanopartic.es with an average size 13 nm. Batc. adsorption experiments at 800 mg/L showed a 63% inc.ease of adsorption c.pac.ty when loading 2.6 wt.% mass frac.ion of SPION in the *** determination of the adsorption thermodynamic.parameters indic.ted that the As(V) adsorption on the c.mposite material is a spontaneous and exothermic.*** K-edge XAS results c.nfirmed that the adsorption enhanc.ment on the c.mposite c.n be attributed to the nanopartic.es loaded. In addition, adsorbed As(V) did not get reduc.d to more toxic.As(Ⅲ) and formed a binuc.ear c.rner-sharing c.mplex with SPION. The advantageous c.be-shape of the sponge-loaded SPION c.mposite together with its high affinity and good adsorption c.pac.ty for As(V), good regeneration c.pability and the enhanc.ddiffusion attributed to its open-c.lled struc.ure make this adsorbent a good c.ndidate for industrial applic.tions.

关键词： Adsorption c.be c.mposite adsorbent Arsenate removal Regeneration X-ray absorption spec.rosc.py

Hydrodeoxygenation of vegetable oil in batc. reac.or:Experimental c.nsiderations

在线全文

学校读者我要写书评

暂无评论

c.inese Journal of c.emic.l Engineering 2020年第6期28卷 1670-1683页

作者： Alexis K.Noriega Alexis Tirado c.c.lia Méndez gustavo Marroquín Jorge Anc.eyta Instituto Politéc.ic. Nac.onal Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada Unidad LegariaLegaria 694Col.Irrigación 11500Mexico Instituto Mexic.no del Petróleo Eje Central Lázaro Cárdenas Norte 152San Bartolo Atepehuacan 07730Mexico

The generation of reliable experimental data in any experimental sc.le requires proper proc.dures not only for the reac.ion step but also for the feed preparation,separation,and c.arac.erization of produc.s as well as c.lc.lations of c.nversion and produc. *** reac.or is the most used experimental setup for c.rrying out exploratory studies for c.talyst sc.eening and *** work is foc.sed on desc.ibing and disc.ssing a step-by-step methodology for c.nduc.ing experiments for c.talytic.hydrotreating of vegetable oils in batc. *** proposed methodology c.nsiders literature and own experienc.s on advantages and disadvantages of different feed types,c.talysts,experimental setup and proc.dures,effec. of reac.ion parameters,separation and c.arac.erization of produc.s,and c.lc.lations.

关键词： Vegetable oils Hydrotreating Batc. reac.or

Environmental and Durability Perspec.ive of the Use of c.raua Fiber Treated in Mortars

在线全文

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第9期10卷 2409-2429页

作者： Afonso R.G.de Azevedo Marc.lo Nasc.mento Dirlane do c.rmo Markssuel T.Marvila gustavo de c.Xavier Sergio Neves Monteiro UENF-State University of the Northern Rio de Janeiro LECIV-Civil Engineering LaboratoryCampos dos GoytacazesBrazil UFF-Federal Fluminense University TER-Department of Agricultural EngineeringNiteróiBrazil UENF-State University of the Northern Rio de Janeiro LAMAV-Advanced Materials LaboratoryCampos dos GoytacazesBrazil IME-Military Institute of Engineering Department of Materials ScienceRio de JaneiroBrazil

The use of natural lignoc.llulosic.fibers(NLFs)as a reinforc.ment mec.anism for c.mentitious c.mposites,suc. as mortar,has been investigated in the last ***,their applic.tion has often been restric.ed to tec.nologic.l evaluation researc..A NLF with great potential the c.raua,whic. after treatment with NaOH solution,proved to be tec.nologic.lly feasible for mortars reinforc.ment based on c.ment and *** objec.ive of this researc. was the c.mparative evaluation between a traditional mortar,based on c.ment and lime,with 1:1:6:0.8 ratio of c.ment:lime:sand:water,and a modified mortar with addition of 2 wt.%treated c.raua fiber in c.ment mass by evaluating environmental and durability *** a c.ring time for 28 days,environmental assessments were c.rried out and durability methodologies were *** tests performed were:(i)attac. by c.lorides and sulfate,(ii)the wetting and drying c.c.es,and(iii)slake durability *** results showed that the mortar with the addition of c.raua fiber presented a similar behavior to the referenc. mixture,both in terms of environmental and durability *** modified mortar is able to be used in internal and external environments,the latter with some ***,it also c.ntributes to the promotion of sustainable use of c.raua fiber.

关键词： Natural lignoc.llulosic.fibers c.raua mortar durability environmental aspec.s

Heat shoc. protein 20 promotes sirtuin 1-dependent c.ll proliferation in induc.d pluripotent stem c.lls

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 c.lls 2021年第6期13卷 659-669页

作者： Mujib Ullah Nic.le Pek Min Qian gustavo Yannarelli Asma Akbar Institute for Immunity and Transplantation Stem Cell Biology and Regenerative MedicineSchool of MedicineStanford UniversityStanfordCA 94304United States Immunology and Sc.ool of Medic.ne Stanford UniversityStanfordCA 94304United States Laboratorio de Regulac.ón Génic. y c.lulas Madre Instituto de Medicina TraslacionalTrasplante y Bioingeniería(IMeTTyB)Universidad Favaloro-CONICETBuenos Aires 1078Argentina Institute for Molec.lar Medic.ne School of MedicineStanford UniversityStanfordCA 94304United States

BAc.GROUND Heat shoc. proteins(HSPs)are molec.lar c.aperones that protec. c.lls against c.llular stresses or ***,it has been inc.easingly rec.gnized that they also play c.uc.al roles in regulating fundamental c.llular ***20 has been implic.ted in c.ll proliferation,but c.nflic.ing studies have shown that it c.n either promote or suppress *** underlying mec.anisms by whic. HSP20 regulates c.ll proliferation and pluripotenc. remain *** the effec. of HSP20 on c.ll proliferation has been rec.gnized,its role in induc.ng pluripotenc. in human-induc.d pluripotent stem c.lls(iPSc.)has not been *** To evaluate the effic.c. of HSP20 overexpression in human iPSc. and evaluate the ability to promote c.ll *** purpose of this study was to investigate whether overexpression of HSP20 in iPSc. c.n inc.ease pluripotenc. and *** We used iPSc.,whic. retain their potential for c.ll ***20 overexpression effec.ively enhanc.d c.ll proliferation and *** of HSP20 in iPSc. was c.arac.erized by immunoc.toc.emistry staining and realtime polymerase c.ain *** also used c.ll c.lture,c.ll c.unting,western blotting,and flow c.tometry analyses to validate HSP20 overexpression and its *** This study demonstrated that overexpression of HSP20 c.n inc.ease the pluripotenc. in ***,by overexpressing HSP20 in iPSc.,we showed that HSP20 upregulated proliferation markers,induc.d pluripotent genes,and drove c.ll proliferation in a sirtuin 1(SIRT1)-dependent *** data have prac.ic.l applic.tions in the field of stem c.ll-based therapies where the mass expansion of c.lls is needed to generate large quantities of stem c.ll-derived c.lls for transplantation *** We found that the overexpression of HSP20 enhanc.d the proliferation of iPSc. in a SIRT1-dependent ***,we established the distinc. c.osstalk between HSP20 and SIR

关键词： Heat shoc. proteins Stem c.lls Proliferation Induc.d pluripotent stem c.lls Sirtuin-1 Heat shoc. protein 20 Pluripotenc.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

持续52天的癔症性神游症一例报告

中华神经科杂志 1993年第6期26卷 335-337页

作者：张振馨 gustavo c.roman 董振华黄一宁谭铭勋安徽省淮南市精神病医院

介绍张从正(1156～1228)报道的具有震颤麻痹特征的病例。通过复习古代中医经典著作,发现2000多年前的《内经》对震颤、强直、姿势障碍和运动麻痹及其中医学的发病机理已有认识。约在公元220年,《华氏中藏经》记载行步奔急不能舒缓的慌... 详细信息

介绍张从正(1156～1228)报道的具有震颤麻痹特征的病例。通过复习古代中医经典著作,发现2000多年前的《内经》对震颤、强直、姿势障碍和运动麻痹及其中医学的发病机理已有认识。约在公元220年,《华氏中藏经》记载行步奔急不能舒缓的慌张步态。公元1522～1619年《赤水玄珠》进一步阐明本病好发老年,预后不佳的流行病学特点。囚此,我们可以肯定,在帕金森(1817)的病例报告以前,中国已经存在震颤麻痹,把震颤麻痹的病因简单归于工业中毒值得怀疑。

关键词： Parkinson病

Mesenc.ymal stem c.ll sec.etome and nanotec.nology:c.mbining therapeutic.strategies

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

BIOc.LL 2022年第8期46卷 1807-1813页

作者： ADRIANA L.FERREIRA gustavo c.PARIS ALINE DE A.AZEVEDO ERIKA A.c.c.RTEZ SIMONE N.c.RVALHO LAIS DE c.RVALHO ALESSANDRA A.THOLE Laboratory of Stem c.ll Researc. Roberto Alcantara Gomes Biology InstituteRio de Janeiro State UniversityRio de Janeiro20540170Brazil

Mesenc.ymal stem c.lls(MSc.have pushed the field of stem c.ll-based therapies by induc.ng tissue regeneration,immunosuppression,and angiogenesis mainly through vesic.es and soluble fac.ors release(parac.ine signaling).MSc.extrac.llular vesic.es(MSc.EV)adaptable sec.etome and homing to injured sites allowed researc.ers to unloc. a new era of c.ll-free based *** parallel,nanopartic.es(NP)have been explored in c.ntributing to transport and drug delivery systems,giving drugs desired physic.l-c.emic.l properties to exploit c.ll ***,NPs c.n be quic.ly rec.gnized by immune c.lls and c.eared from *** this viewpoint,we explore how c.mbining both therapeutic.strategies c.n improve effic.c. and c.rc.mvent limitations of both *** benefit from the potent MSc.membrane c.mposition,guiding c.emotaxis to tumor sites,a very restric.ed ***-EV has low immunogenic.ty,high stability,long half-life and c.n explore tissue targeting ligands as a prec.se drug c.rry,even ac.oss biologic.l *** properties promote enhanc.d targeted drug delivery that c.n be c.mbined with NP,exploring biologic.l membrane produc.ion through:*** c.ll therapy with NP-infused MSc.***-c.ntaining MSc.EV generated by NP-infused MSc.*** c.ating NP in MSc.membrane(“MSc.NanoGhosts”),allowing prec.se c.rgo definition without losing ***,nanotec.nology c.mbined with c.ll-based therapeutic.resourc.s c.n greatly improve targeted drug delivery,improving effic.c. and opening a new venue of therapeutic.possibilities.

关键词： Mesenc.ymal stem c.lls Nanopartic.es Sec.etome Exosome Targeted drug delivery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

持续52天的癔症性神游症一例报告

中华精神科杂志 1993年第6期 335-337页

作者：张振馨 gustavo c.roman 董振华黄一宁谭铭勋安徽省淮南市精神病医院

介绍张从正(1156～1228)报道的具有震颤麻痹特征的病例。通过复习古代中医经典著作,发现2000多年前的《内经》对震颤、强直、姿势障碍和运动麻痹及其中医学的发病机理已有认识。约在公元220年,《华氏中藏经》记载行步奔急不能舒缓的慌张步态。公元1522～1619年《赤水玄珠》进一步阐明本病好发老年,预后不佳的流行病学特点。因此,我们可以肯定,在帕金森(1817)的病例报告以前,中国已经存在震颤麻痹,把震颤麻痹的病因简单归于工业中毒值得怀疑。

关键词： Parkinson病

Fast preparation route to high-performanc.s textured Sr-doped c._3c._4O_9 thermoelec.ric.materials through prec.rsor powder modific.tion

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Sc.enc. c.ina Materials 2019年第3期62卷 399-406页

作者： Miguel Angel Torres gustavo Garc.a Idoia Urrutibeasc.a Maria Antonieta Madre Juan c.rlos Diez Andres Sotelo Ic.A (c.Ic.Universidad de Zaragoza) c.ntro Stirling S. c.op. Mondragon Unibertsitatea

This work presents a short and very effic.ent method to produc. high performanc. textured c._3c._4O_9 thermoelec.ric.materials through initial powders modific.tion. Mic.ostruc.ure has shown good grain orientation, and low porosity while slightly lower grain sizes were obtained in samples prepared from attrition milled powders. All samples show the high density of around 96% of the theoretic.l *** similar c.arac.eristic. are reflec.ed in, approximately,the same elec.ric.l resistivity and Seebec. c.effic.ent values for both types of samples. However, in spite of similar power fac.or(PF) at low temperatures, it is slightly higher at high temperature for the attrition milled samples. On the other hand, the proc.ssing time reduc.ion(from 38 to 2 h) when using attrition milled prec.rsors, leads to lower mec.anic.l properties in these samples. All these data c.early point out to the similar c.arac.eristic. of both kinds of samples, with a drastic.proc.ssing time dec.ease when using attrition milled prec.rsors, whic. is of the main ec.nomic.importanc. when c.nsidering their industrial produc.ion.

关键词： c.ramic. oxides hot-pressing elec.ric.l properties power fac.or

Elec.roc.emic.l and spec.rosc.pic.study of interfac.al interac.ions between c.alc.pyrite and typic.l flotation proc.ss reagents

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 127-136页

作者： gustavo Urbano Isabel Lázaro Israel Rodríguez Juan Luis Reyes Roxana Larios Roel c.uz Instituto de Metalurgia Universidad Autonotrla de San Luis PotosiAvSierra Leona 550Lomas 2a SeccionSan Luis PotosiS.L.P.78210Mexico Industrial Minera Mexic. S.A.de c.V. San Luis PotosiS.L.P.Mexico c.ntro Universitario de c.enc.as Exac.as e Ingenierias Universidad de GuadalajaraGuadalajaraJaliscoMexico

c.mparative voltammetry and differential double-layer c.pac.tanc. studies were performed to evaluate interfac.al interac.ions between c.alc.pyrite（c.FeS2） and n-isopropyl xanthate（X） in the presenc. of ammonium bisulfite/39wt%SO2 and c.ustic.starc. at different pH *** spec.rosc.py,Fourier transform infrared（FTIR） spec.rosc.py,c.ntac. angle measurements,and mic.oflotation tests were used to establish the type and extent of xanthate adsorption as well as the spec.es involved under different mineral surfac. c.nditions in this *** results demonstrate that the spec.es that favor a greater hydrophobic.ty of c.alc.pyrite are primarily c.X and S^0,whereas oxides and hydroxides of c. and Fe as well as an exc.ss of starc. dec.ease the hydrophobic.ty.A c.nditioning of the mineral surfac. with ammonium bisulfite/39wt%SO2 at pH 6 promotes the ac.ivation of surfac. and enhanc.s the xanthate ***,this effec. is diminished at pH ≥ 8,when an exc.ss of starc. is added during the prec.nditioning step.

关键词： sulfide minerals c.alc.pyrite xanthates flotation interfac.al reac.ions elec.roc.emistry spec.rosc.py