检索结果-南通市图书馆

Suzuki React.on of Aryl Bromides Using a Phosphine-Free Magnet.c Nanopart.cle-Support.d Palladium Cat.lyst

在线全文

学校读者我要写书评

暂无评论

催化学报 2011年第11期32卷 1667-1676页

作者： Nghia t. BUI t.ung B. DANG Ha V. LE nam t. S. phan Depart.ent.of Chemical Engineering HCMC University of Technology VNU-HCM 268 Ly Thuong Kiet Distriet 10 Ho Chi Minh City Viet Nam

A palladium cat.lyst.immobilized on superparaganet.c nanopart.cles was prepared wit. a palladium loading of 0.30 mmol/g. t.e cat.lyst.was charact.rized using X-ray diffract.on, scanning elect.on microscopy, t.ansmission elect.on microscopy, vibrat.ng sample magnet.met.y, t.ermogravimet.ic analysis, Fourier t.ansform infrared, at.mic absorpt.on spect.ophot.met.y, and nit.ogen adsorpt.on. t.e immobilized palladium cat.lyst.was an efficient.cat.lyst.wit.out.added phosphine ligands for t.e Suzuki cross-coupling react.on of several aryl bromides wit. phenylboronic acid. t.e recovery of cat.lyst.was simply by magnet.c decant.t.on in t.e presence of a magnet. t.e immobilized palladium cat.lyst.can be reused many t.mes wit.out.significant.degradat.on in cat.lyt.c act.vit.. No leaching of act.ve palladium species int. t.e react.on solut.on was det.ct.d.

关键词： superparamagnet.c nanopart.cle Suzuki react.on palladium aryl bromide

Det.rminat.on of fuel burnup dist.ibut.on of a research react.r based on measurement. at.subcrit.cal condit.ons

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and t.chniques 2018年第12期29卷 30-38页

作者： Quang Binh Do Hoai-nam t.an Quang Huy Ngo Giang t. t. phan Ho Chi Minh Cit. Universit. of t.chnology and Educat.on 1 Vo Van Ngan Thu Duc HCMC Vietnam Inst.t.t. of Fundament.l and Applied Sciences Duy Tan University Ho Chi Minh city Vietnam

t.is paper present. t.e det.rminat.on of t.e fuel burnup dist.ibut.on of t.e Dalat.nuclear research react.r(DNRR) using a met.od of measurement. at.subcrit.cal condit.ons. t.e met.od is based on t.e assumpt.on of linear dependence of t.e react.vit. on t.e burnup of fuel bundles and t.e measurement. at.subcrit.cal *** measurement. were t.ken for seven select.d fuel bundles in t.o different.measuring sequences. t.e measured burnup values have also been compared wit. t.e calculat.ons for verifying t.e met.od and t.e measurement.procedure. t.e result. obt.ined wit. t.e t.ree det.ct.rs have a good agreement.wit. each ot.er wit. a discrepancy less t.an 1.0%. t.e errors of t.e measured burnup values are wit.in 6%. Comparison bet.een t.e calculat.d and measured burnup values shows t.at.t.e discrepancy of t.e C/E rat.o is wit.in 9% compared t. unit.. t.e result. indicat. t.at.t.e met.od of measurement. at.subcrit.cal condit.ons could be well applied t. det.rmine t.e relat.ve burnup dist.ibut.on of t.e DNRR.

关键词：研究反应堆燃料分发测量过程验证方法方法论价值计算

Wedelolact.ne from Eclipt. prost.at.(L)*** inflammat.on and improves insulin resist.nce

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of t.opical Biomedicine 2024年第6期14卷 253-258页

作者： t.inh t.t.Cuong Duong Duc t.ien Hoang Hai Yen Nguyen Anh Duc t.inh Quang nam Do Viet.Khanh Key Laborat.ry for Enzyme and Prot.in t.chnology Vietnam National University University of ScienceHanoiVietnam Facult. of Biology Vietnam National University University of ScienceHanoiVietnam Hanoi Universit. of Pharmacy HanoiVietnam Vinschool HanoiVietnam

Object.ve:t. evaluat. t.e effect. of wedelolact.ne,a major flavonoid from Viet.0}ese Eclipt. prost.at.(L)L.,on inflammat.on and insulin ***:Wedelolact.ne was ext.act.d from t.e leaves of Viet.0}ese Eclipt. prost.at.(L.)*** met.anol by *** effect. of wedelolact.ne on lipopolysaccharide(LPS)-induced cyt.kine product.on,react.ve oxygen species(ROS)generat.on,and nicot.namide adenine dinucleot.de phosphat.(NADPH)oxidase act.vit.es in Raw 264.7 cells were measured by enzyme-linked immunosorbent.assay(ELISA),specific immunofluorescent.dyes and luminomet.ic analysis,*** addit.on,it. effect. on glucose upt.ke and t.e prot.in expression of insulin recept.r subst.at. 1(IRS1)and glucose t.ansport.r 4(GLUt.)were examined in 3t.-L1 cells by immunofluorescent.dyes and West.rn ***:Wedelolact.ne at.30μg/mL significant.y inhibit.d LPS-induced product.on of t.mor necrosis fact.r-α,int.rleukin(IL)-6,and IL-8(Pt. no not.ceable effect. on IL-10 *** also reduced ROS generat.on and NADPH oxidase act.vit.es in LPS-st.mulat.d Raw 264.7 cells(Pt.ermore,wedelolact.ne showed ant.-insulin resist.nce act.vit.,as evidenced by improved glucose upt.ke and t.e upregulat.d expression of IRS1 and GLUt. in 3t.-L1 cells(Pt.ne exhibit. ant.-inflammat.on and ant.-insulin resist.nce effect.,which may be used for t.e t.eat.ent.of diabet.s and inflammat.on-associat.d diseases.

关键词： Wedelolact.ne Eclipt. prost.at. Inflammat.ry responses Ant.-insulin resist.nce Diabet.s IRS1 GLUt.

Chebyshev polynomial-based Rit. met.od for t.ermal buckling and free vibrat.on behaviors of met.l foam beams

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mat.emat.cs and Mechanics(English Edit.on) 2024年第5期45卷 891-910页

作者： N.D.NGUYEN t.N.NGUYEN Facult. of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh City 71309Viet Nam Facult. of Engineering and t.chnology Kien Giang UniversityChau Thanh 92000Viet Nam

t.is st.dy present. t.e Chebyshev polynomials-based Rit. met.od t. examine t.e t.ermal buckling and free vibrat.on charact.rist.cs of met.l foam *** analyses include t.ree models for porosit. dist.ibut.on and t.o scenarios for t.ermal *** mat.rial propert.es are assessed under t.o condit.ons,i.e.,t.mperat.re dependence and t.mperat.re *** t.eoret.cal framework for t.e beams is based on t.e higher-order shear deformat.on t.eory,which incorporat.s shear deformat.ons wit. higher-order *** governing equat.ons are est.blished from t.e Lagrange equat.ons,and t.e beam displacement.fields are approximat.d by t.e Chebyshev *** simulat.ons are performed t. evaluat. t.e effect. of t.ermal load,slenderness,boundary condit.on(BC),and porosit. dist.ibut.on on t.e buckling and vibrat.on behaviors of met.l foam *** findings highlight.t.e significant.influence of t.mperat.re-dependent.t.)mat.rial propert.es on met.l foam beams'buckling and vibrat.on responses.

关键词： Rit. met.od Chebyshev funct.on buckling vibrat.on met.l foam beam higher-order beam t.eory(HOBt.

沸石咪唑酯骨架结构材料ZIF-8催化Friedel-Craft.酰基化反应(英文)

在线全文

学校读者我要写书评

暂无评论

催化学报 2012年第4期33卷 688-696页

作者： Lien t. L. NGUYEN Ky K. A. LE nam t. S. phan Depart.ent.of Chemical Engineering Hochiminh City University of Technology VNU-HCM 268 Ly Thuong Kiet District 10 Ho Chi Minh Citv 740128. Met Nam

A zeolit. imidazolat. framework,ZIF-8,was synt.esized and charact.rized by dynamic laser light.scat.ering,X-ray powder diffract.on,scanning elect.on microscopy,t.ansmission elect.on microscopy,t.ermogravimet.ic analysis,Fourier t.ansform infrared,at.mic absorpt.on spect.ophot.met.y,and nit.ogen adsorpt.on *** ZIF-8 was highly cryst.lline and porous wit. a surface area of over 1600 m2 /***-Craft. acylat.on of anisole and benzoyl chloride proceeded well in t.e presence of ZIF-8(2-6 mol%) wit.out.t.e need for an inert.*** react.on afforded a select.vit. of 93%-95% t. t.e *** solid cat.lyst.can be separat.d from t.e react.on mixt.re by simple cent.ifugat.on and reused wit.out.significant.degradat.on in cat.lyt.c *** was no leaching of act.ve acid species int. t.e react.on solut.on.

关键词：化学催化高压高温

Poroelast.dynamic responses and elast.c moduli of a t.ansversely isot.opic porous cylinder under forced deformat.on t.st

在线全文

学校读者我要写书评

暂无评论

Int.rnat.onal Journal of Mining Science and t.chnology 2023年第7期33卷 793-800页

作者： Chao Liu Dung t.phan Aramco Research Cent.r-Houst.n Houston TX 77084USA

Exist.ng t.ansversely isot.opic poroelast.dynamics solut.ons are limit.d t. infinit. domains and wit.out.experiment.l validat.on. Furt.ermore, t.ere is a lack of analyt.cal simulat.ons for t.e elast.c moduli dispersion of fluid-sat.rat.d porous cylinders. t. address t.ese t.ree limit.t.ons and invest.gat. t.e mechanisms of moduli dispersion, we present.t.e analyt.cal solut.ons of t.e poromechanical responses and t.e elast.c moduli dispersion of a t.ansversely isot.opic, fluid-sat.rat.d, finit. porous cylinder subject.d t. a forced deformat.on t.st. t.rough an example, we demonst.at. t.e effect. of loading frequency, boundary condit.ons, and mat.rial's anisot.opy, dimension, and permeabilit. on t.e responses of pore pressure,force, displacement. and dynamic elast.c moduli of t.e cylinder. t.e specimen's responses are significant.y influenced by t.e frequency of t.e applied load, result.ng in a drained st.t. at.low frequencies and an undrained st.t. at.high frequencies. At.high frequencies, t.e sample behaves ident.cally for an open or a closed lat.ral boundary, and permeabilit. has insignificant.effect.. t.e dynamic elast.c moduli are mainly cont.olled by t.e loading frequency and t.e rat.o of t.e sample's radius t. it. height. Last.y,we show excellent.mat.hes bet.een t.e newly derived analyt.cal solut.on and laborat.ry measurement. on one clay and t.o shale samples from Mont.t.rri.

关键词： Poroelast.dynamics Dynamic moduli t.ansversely isot.opic Porous cylinder Forced deformat.on t.st

Designing Soft.are t. Analyze Sewing Process of Indust.ial Knit.ed Product.

在线全文

学校读者我要写书评

暂无评论

Comput.r Syst.ms Science & Engineering 2023年第2期44卷 1837-1852页

作者： phan t.anh t.ao Nguyen t.anh Hung Pham t.i Le My Nguyen Xuan Hiep Duy-nam phan Hanoi Universit. of Science and t.chnology Hanoi10000Vietnam

In t.e t.xt.le indust.y,garment.manufact.ring cont.ins four major pro-cesses cont.ining cut.ing,sewing,ﬁnishing,and *** is t.e most.crucial and int.icat. sect.on,dealing wit. a large number of varied operat.ons.A successful sewing process needs t. be opt.mized regarding different.fact.rs,including t.me,sewing equipment.and skilled *** lineﬂow is combined by a set.of operat.ons wit. a part.cular *** ut.ost.impor-t.nce of all garment.indust.y is t. arrange t.e workst.t.ons t. minimize t.e num-ber of employees in order t. produce at.t.e best.product.ve rat. wit. t.e most.reasonable cost.short.st.t.me,and sat.sfying *** most.garment.fact.ries,t.e product.on lines are balanced using t.e empirical judgment.of t.e line *** t.e whole process t.e dat. of product.on t.me at.each st.p,labor pro-duct.vit.,proper choices of equipment.were always needed t. calculat. line efﬁ*** far as t.e issue is concerned,t.ere has not.been an academically sewing process analyzing soft.are providing adequat. dat. of sewing mot.ons and sewing t.me as t.e credible input.for t.e line balancing *** t.is goal,t.is paper present. t.e result. of research on opt.mizing academically self-built.soft.are t. analyze t.e sewing process of knit.ed product. applied t. indust.ial product.on using Java programming language on Google *** result. achieved by t.e soft.are are not.only t. analyze sewing product. and t.e t.chnological sewing process,calculat. t.e sewing t.me on t.e machine but.also analyze t.e sewing act.vit.es of workers int. manipulat.ons,movement.,and mot.ons t. calculat. t.e preparat.on t.me for t.o t.pical knit.ed product.,namely,Polo-Shirt.and t.Shirt.wit. t.e case st.dies at.General t.xt.le Garment.Joint.St.ck Company Hanoi and St.r Fashion Company Limit.d.

关键词： Sewing mot.on sewing t.me GSD Mt. polo-shirt t.shirt sewing process sewing operat.on analyzing soft.are

Survival benefit.of concurrent.chemoradiot.erapy for advanced ampulla of Vat.r cancer

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 Clinical Cases 2024年第2期12卷 267-275页

作者： Chae Hwa Kwon Hyung Il Seo Dong Uk Kim Sung Yong Han Suk Kim nam Kyung Lee Seung Baek Hong Ji Hyun Ahn Young Mok Park Byeong Gwan Noh BioMedical Research Inst.t.t. Pusan National University HospitalBusan 49241South Korea Depart.ent.of Surgery Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Depart.ent.of Int.rnal Medicine Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Depart.ent.of Radiology Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 49241South Korea Depart.ent.of Pat.ology and Biomedical Research Inst.t.t. Pusan National University HospitalBusan 49241South Korea

BACKGROUND Current.y,t.ere is no st.ndard adjuvant.t.erapy for pat.ent. wit. resect.d ampulla of Vat.r(AoV)*** t. evaluat. t.e effect.veness of adjuvant.concurrent.chemoradiot.erapy(CCRt.in pat.ent. wit. advanced AoV cancer who underwent.curat.ve *** t.is single-cent.red,ret.ospect.ve st.dy included 29 pat.ent. wit. advanced AoV cancer who underwent.pancreat.coduodenect.my bet.een 2006 and *** impact.of CCRt.on advanced AoV cancer was *** t.e 1-,3-,and 5-yr recurrence-free survival(RFS)rat.s for pat.ent. wit. advanced AoV cancer were 82.8%,48.3%,and 40.8%,respect.vely,and t.e overall survival(OS)rat.s were 89.7%,62.1%,and 51.7%,***-cular invasion was found t. be a significant.risk fact.r for RFS and OS in pat.ent. wit. advanced AoV cancer in t.e univariat. analysis,whereas t.st.ge and lymph node met.st.sis were significant.y associat.d wit. OS in t.e mult.variat. *** t. t.e pat.ent. who did not.receive adjuvant.CCRt.t.ose who received adjuvant.CCRt.did not.show st.t.st.cally significant.improvement. in t.e RFS and OS,alt.ough t.ey had a significant.y lower average age and significant.y higher plat.let.t.-lymphocyt. *** Adjuvant.CCRt.did not.improve survival out.omes in pat.ent. wit. advanced AoV *** findings cont.ibut. t. exist.ng knowledge on t.e effect.veness of CCRt.in t.is pat.ent.populat.on and provide import.nt.insight. for clinical decision-making.

关键词： Advanced ampulla of Vat.r cancer Adjuvant.concurrent.chemoradiot.erapy Recurrence Survival Vat.r cancer

St.uct.ral Charact.rist.cs of Allomyrina Dichot.ma Beet.e＇s Hind Wings for Flapping Wing Micro Air Vehicle

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 Bionic Engineering 2014年第2期11卷 226-235页

作者： Ngoc San Ha Quang t.i t.uong Hoang Vu phan nam Seo Goo Hoon Cheol Park Biomimet.cs and Int.lligent.Microsyst.m Laborat.ry Department of Advanced Technology Fusion Division of Interdisciplinary Studies Konkuk University Seoul 143-701 Republic of Korea

In t.is st.dy, we present.a complet. st.uct.ral analysis ofAllomyrina dichot.ma beet.e＇s hind wings by invest.gat.ng t.eir st.t.c and dynamic charact.rist.cs. t.e wing was subject.d t. t.e st.t.c loading t. det.rmine it. overall flexural st.ffness. Dy- namic charact.rist.cs such as nat.ral frequency, mode shape, and damping rat.o of vibrat.on modes in t.e operat.ng frequency range were det.rmined using a Bruel ＆ Kjaer fast.Fourier t.ansform analyzer along wit. a laser sensor. t.e st.t.c and dynamic charact.rist.cs of nat.ral Allomyrina dichot.ma beet.e＇s hind wings were compared t. t.ose of a fabricat.d art.ficial wing. t.e result. indicat. t.at.nat.ral frequencies of t.e nat.ral wing were significant.y correlat.d t. t.e wing surface area densit. t.at.was defined as t.e wing mass divided by t.e hind wing surface area. Moreover, t.e bending behaviors of t.e nat.ral wing and art.ficial wing were similar t. t.at.of a cant.lever beam. Furt.ermore, t.e flexural st.ffness of t.e art.ficial wing was a lit.le higher t.an t.at.of t.e nat.ral one whereas t.e nat.ral frequency of t.e nat.ral wing was close t. t.at.of t.e art.ficial wing. t.ese result. provide import.nt.informat.on for t.e biomimet.c design of insect.scale art.ficial wings, wit. which highly ma- neuverable and efficient.micro air vehicles can be designed.

关键词： beet.e hind wing flexural st.ffness nat.ral frequency mode shape Micro Air Vehicles (MAVs)