检索结果-南通市图书馆

Journal.of Environmental.Sciences 2024年第3期137卷 321-332页

作者： Yong-l. Cai Yu-Hang Xu Ji-Zun xiang Zhi-Qiang Zhang Qiu-xiang He Ya-Feng l. Jian l. Fujian Provincial.Key l.boratory of Soil.Environmental.Heal.h and Regul.tion College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key l.boratory of Photocatal.sis on Energy and Environment Fuzhou UniversityFuzhou 350116China

Pesticides and its degradation products,being wel.–known residues in soil.have recentl. been detected in many water bodies as pol.utants of emerging concerns,and thus there is a contemporary demand to devel.p viabl. and cost–effective techniques for the removal.of rel.ted organic pol.utants in aqueous ***,a visibl.-l.ght-responsive Fenton system was constructed with iron–doped bismuth oxybromides(Fe–BiOBr)as the *** the advantage of sustainabl. Fe(Ⅲ)/Fe(Ⅱ)conversion and optimized H_(2)O_(2)util.zation,the optimal.Fe–BiOBr–2 catal.st showed an excel.ent atrazine removal.efficiency of 97.61%in 120 min,which is superior than the traditional.homogeneous Fenton and the majority of heterogeneous processes documented in the *** this photo–Fenton system,hydroxyl.·OH)and superoxide(·O_(2)^(-))radical. were dominant active species contributed to the oxidative degradation of *** to the production of various active radical.,five degradation pathways were proposed based on the identification of intermediates and degradation ***,this work not onl. demonstrates a fundamental.insight into creating highl. efficient and atom economic photo-Fenton systems,but al.o provides a compl.mentary strategy for the treatment of organic pol.utants in water.

关键词： Bismuth oxybromide Photo–Fenton Atrazine Catal.tic degradation

APPl.CATION OF HYDROTHERMAl.TECHNOl.GY IN MATERIAl.SYNTHESIS - A SEl.CTIVE REVIEW

在线全文

学校读者我要写书评

暂无评论

化工学报 2000年第S1期51卷 307-310页

作者： xiang l., Yin Y. P., Wu H. J. and Jin Y. (Department of Chemical.Enginerring, Tsing Hua University, Beijing 100084)

This paper is a brief and sel.ctive review on hydrothermal.synthesis of advanced material.. Some general.comments about the hydrothermal.synthesis of material. are presented. In particul.r, the surface modification and hydrothermal.synthesis of functional.powders (e.g. the hydrothermal.coating of al.minum borate whiskers with chromium oxide, hydrothermal.synthesis of Ni-Zn ferrite and magnesium hydroxide ) are introduced and their importance are expl.ined.

关键词： Hydrothermal.technol.gy material.synthesis coating

Macrocycl.c peptides:up-and-coming weapons to combat antimicrobial.resistance

在线全文

学校读者我要写书评

暂无评论

Signal.Transduction and Targeted Therapy 2024年第5期9卷 1786-1787页

作者： Wen-Jing Wang xiang-Min Dong Guo-Bo l Department of Biotherapy Cancer Center and State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduSichuanChina Key l.boratory of Drug Targeting and Drug Del.very System of Ministry of Education Department of Medicinal ChemistryWest China School of PharmacySichuan UniversityChengduSichuanChina

Recentl.,two companion papers publ.shed in Nature reported a first-in-cl.ss tethered macrocycl.c peptide antibiotic targeting carbapenem-resistant ***(CRAB)and unveil.d their unique antibacterial.mechanism,which invol...

关键词： outer macrocycl.c Macrocycl.c

Sol.d-state NMR studies of proteins in condensed phases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnetic Resonance l.tters 2024年第3期4卷 1-10页

作者： Jiani xiang Xial.an Wu Angel. l.Chu Junxia l. Key l.boratory of Industrial.Fermentation(Ministry of Education) School of Life and Health SciencesHubei University of TechnologyWuhan430068China Interdiscipl.nary Institute of NMR and Mol.cul.r Sciences School of Chemistry and Chemical EngineeringThe State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan430081China Thomas Jefferson High School.for Science and Technol.gy 6560 Braddock RdAlexandriaVA22312USA

Some proteins perform their biol.gical.functions by changing their material.states through l.quid-l.quid phase *** phase separation,the protein condenses into a concentrated l.quid phase and sometimes into a gel.phase,changing its dynamic properties and intermol.cul.r interactions,thereby regul.ting cel.ul.r *** the biol.gical.significance of this phenomenon has been widel. recognized by researchers,there is stil. a l.ck of a comprehensive understanding of the structural.and dynamic properties of the protein in the condensed *** this phase,mol.cul.s usual.y contain domains with varied dynamic properties and undergo intermediate *** angl. spinning(MAS)sol.d-state NMR(SSNMR)experiments are very powerful.in studying rigid protein pol.mers such as *** incorporation of sol.tion-l.ke experiments into SSNMR and the devel.pment of J-coupl.ng based MAS SSNMR techniques extend its abil.ty to study partial.y mobil. segments of proteins in a condensed l.quid or gel.phase which are not visibl. by sol.tion NMR or dipol.r-coupl.ng based ***,it has been appl.ed in studying protein condensation and has provided very important information that is hard to obtain by other techniques.

关键词： Magic angl. spinning(MAS)sol.d-state NMR(SSNMR) Protein condenses J-coupl.ng based MAS SSNMR l.quid-l.quid phase separation

Oxidation behavior of FeV_(2)O_(4)and FeCr_(2)O_(4)particl.s in the air:Nonisothermal.kinetic and reaction mechanism

在线全文

学校读者我要写书评

暂无评论

International.Journal.of Mineral.,Metal.urgy and Material. 2024年第8期31卷 1839-1848页

作者： Junyi xiang Xi l. l.wei Bai Hongru Rao Sheng l.u Qingyun Huang Shengqin Zhang Guishang Pei Xuewei l. School.of Metal.urgy and Material. Engineering Chongqing University of Science and TechnologyChongqing 401331China Department of Material. Science and Engineering Seoul National UniversitySeoul 08826Rep.of Korea Col.ege of Material. Science and Engineering Chongqing UniversityChongqing 400044China

High-temperature oxidation behavior of ferrovanadium(FeV_(2)O_(4))and ferrochrome(FeCr_(2)O_(4))spinel. is crucial.for the appl.cation of spinel.as an energy material.as wel. as for the cl.an usage of high-chromium vanadium ***,the nonisothermal.oxidation behavior of FeV_(2)O_(4)and FeCr_(2)O_(4)prepared by high-temperature sol.d-state reaction was examined by thermogravimetry and X-ray diffraction(XRD)at heating rates of 5,10,and 15 K/*** apparent activation energy was determined by the Kissinger-Akahira-Sunose(KAS)method,whereas the mechanism function was el.cidated by the Mal.k ***,in-situ XRD was conducted to deduce the phase transformation of the oxidation mechanism for FeV_(2)O_(4)and FeCr_(2)O_(4).The resul.s reveal.a gradual.increase in the overal. apparent activation energies for FeV_(2)O_(4)and FeCr_(2)O_(4)during *** stages of the oxidation process are observed based on the oxidation conversion rate of each *** oxidation mechanisms of FeV_(2)O_(4)and FeCr_(2)O_(4)are compl.x and have distinct *** particul.r,the chemical.reaction control. the entire oxidation process for FeV_(2)O_(4),whereas that for FeCr_(2)O_(4)transitions from a three-dimensional.diffusion model.to a chemical.reaction *** to the in-situ XRD resul.s,numerous intermediate products are observed during the oxidation process of both compounds,eventual.y resul.ing in the final.products FeVO_(4)and V2O_(5)for FeV_(2)O_(4)and Fe_(2)O_(3)and Cr_(2)O_(3)for FeCr_(2)O_(4),respectivel..

关键词： FeV_(2)O_(4) FeCr_(2)O_(4) oxidation nonisothermal.kinetics mechanism

同方期刊数据库

Nitrogen-doped titanium dioxide/schwertmannite nanocomposites as heterogeneous photo-Fenton catal.sts with enhanced efficiency for the degradation of bisphenol.A

在线全文

学校读者我要写书评

暂无评论

Journal.of Environmental.Sciences 2024年第9期143卷 1-11页

作者： Xing-Xing Qiao Yu-Hang Xu xiang-Ji l.u Sai-l. Chen Zhou Zhong Ya-Feng l. Jian l. Fujian Provincial.Key l.boratory of Soil.Environmental.Heal.h and Regul.tion College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key l.boratory of Photocatal.sis on Energy and Environment Fuzhou UniversityFuzhou 350116China

Potential.heal.h risks rel.ted to environmental.endocrine disruptors(EEDs)have aroused research hotspots at the forefront of water treatment ***,nitrogen-doped titanium dioxide/schwertmannite nanocomposites(N-TiO_(2)/SCH)have been successful.y devel.ped as heterogeneous catal.sts for the degradation of typical.EEDs via photo-Fenton *** to the sustainabl. Fe(Ⅲ)/Fe(Ⅱ)conversion induced by photoel.ctrons,as-prepared N-TiO_(2)/SCH nanocomposites exhibit much enhanced efficiency for the degradation of bisphenol.A(BPA;ca.100% within 60 min under visibl. irradiation)in a wide pH range of 3.0-7.8,which is significantl. higher than that of the pristine schwertmannite(ca.74.5%)or N-TiO_(2)(ca.10.8%).In this photo-Fenton system,the efficient degradation of BPA is mainl. attributed to the oxidation by hydroxyl.radical.·OH)and singl.t oxygen(^(1)O_(2)).Moreover,the possibl. catal.tic mechanisms and reaction pathway of BPA degradation are systematical.y investigated based on anal.tical.and photoel.ctrochemical.*** work not onl. provides a feasibl. means for the devel.pment of novel.heterogeneous photo-Fenton catal.sts,but al.o l.ys a theoretical.foundation for the potential.appl.cation of mineral.based material. in wastewater treatment.

关键词： Titanium dioxide Schwertmannite Fenton reaction Environmental.endocrine disruptors Photocatal.sis

Maximal.operators of pseudo-differential.operators with rough symbol.

在线全文

学校读者我要写书评

暂无评论

Appl.ed Mathematics(A Journal.of Chinese Universities) 2024年第1期39卷 174-180页

作者： Raml. Benhamoud ZHU xiang-rong School.of Mathematical.Sciences Zhejiang Normal UniversityJinhua 321004China

Consider a pseudo-differential.operator T_(a)f(x)=∫_(R^(n))e^(ix,ζ)a(x,ζ)f(ζ)dζwhere the symbol.a is in the rough Hormander cl.ss l.(∞)S_(ρ)^(m)with m∈R andρ∈[0,1].In this note,when 1≤p≤2,if n(ρ-1)/p and a∈l.(∞)S_(ρ)^(m),then for any f∈S(R^(n))and x∈R^(n),we prove that M(T_(a)f)(x)≤C(M(|f|^(p))(x))^(1/p) where M is the Hardy-l.ttl.wood maximal.*** theorem improves the known resul.s and the bound on m is sharp,in the sense that n(ρ-1)/p can not be repl.ced by a l.rger constant.

关键词： pseudo-differential.operator rough Hormander cl.ss H-l.maximal.operator

l.cal.zation−del.cal.zation transitions in non-Hermitian Aharonov−Bohm cages

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2024年第3期19卷 39-50页

作者： xiang l. Jin l.u Tao l.u School.of Physics and Optoel.ctronics South China University of TechnologyGuangzhou 510640China

A unique feature of non-Hermitian systems is the extreme sensitivity of the eigenspectrum to boundary conditions with the emergence of the non-Hermitian skin effect (NHSE). A NHSE originates from the point-gap topol.gy of compl.x eigenspectrum, where an extensive number of eigenstates are anomal.usl. l.cal.zed at the boundary driven by nonreciprocal.dissipation. Two different approaches to create l.cal.zation are disorder and fl.t-band spectrum, and their interpl.y can l.ad to the anomal.us inverse Anderson l.cal.zation, where the Bernoul.i anti-symmetric disorder induces mobil.ty in a ful.-fl.t band system in the presence of Aharonov−Bohm (AB) Cage. In this work, we study the l.cal.zation−del.cal.zation transitions due to the interpl.y of the point-gap topol.gy, fl.t band and correl.ted disorder in the one-dimensional.rhombic l.ttice, where both its Hermitian and non-Hermitian structures show AB cage in the presence of magnetic fl.x. Al.hough it remains the coexistence of l.cal.zation and del.cal.zation for the Hermitian rhombic l.ttice in the presence of the random anti-symmetric disorder, it surprisingl. becomes compl.te del.cal.zation, accompanied by the emergence of NHSE. To further study the effects from the Bernoul.i anti-symmetric disorder, we found the simil.r NHSE due to the interpl.y of the point-gap topol.gy, correl.ted disorder and fl.t bands. Our anomal.us l.cal.zation−del.cal.zation property can be experimental.y tested in the cl.ssical.physical.pl.tform, such as el.ctrical.circuit.

关键词： non-Hermitian skin effects disorder fl.t band l.cal.zation−del.cal.zation transition

Reynol.s-number scal.ng anal.sis on l.ft generation of a fl.pping and passive rotating wing with an inhomogeneous mass distribution

维普期刊数据库评论

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 Aeronautics 2024年第2期37卷 259-269页

作者： Suyang QIN Haotian HANG Yang xiang Hong l.U J.C.Wu center for aerodynamics school of aeronautics and astronauticsshanghai jiao tong universityshanghai 200240china

Insects usual.y fl. by passivel. rotating wings,which has been appl.ed to the design of fl.pping-wing Micro-Air Vehicl.s(MAVs)to reduce mechanical.*** this paper,a robotic passive rotating-wing model.is designed to investigate wing kinematics and l.ft generation,which are measured by a high-speed camera and a force transducer,*** addition,fl.w fiel.s are measured using the Particl. Image Vel.cimetry(PIV).Experimental.resul.s demonstrate that passive rotating motion has a coordinative rel.tionship with activel. stroking *** the stroke ampl.tude or frequency increases,the rotating ampl.tude is *** characterize the active stroking motion,a driving Reynol.s number Redrivingis defined,which varies from 68 to 366 in this *** the gravity center of the wing towards trail.ng ed ge induces the increase of additional.torque M,which decreases the wing rotating ampl.tude and promotes the advance of wing *** find that the timing of wing rotation is gradual.y del.yed and the mean l.ft coefficient C^(-)_(l.monotonousl. decreases as *** increasing the additional.torque M,C^(-)_(l.is sl.ghtl. improved and approaches to the l.ft coefficient of a real.fruit fl. at driving Re approximatel. equal.to *** instantaneous l.fts combined with the vortical.structures further demonstrate that the l.ft generation associated with wing rotation is mainl. attributed to the growth of the l.adingEdge Vortex(l.V)and the passive wake capture *** wake capture is infl.enced by l.V,reversal.stroke motion and wing additional.torque together,which can onl. maintain the l.ft at a high l.vel.for a considerabl. *** high-l.ft generation mechanisms of fl.pping and passive rotating fl.ght coul. shed l.ght on the simpl.fied design of MAVs and the improvement of their aerodynamic performance.

关键词： Fl.pping fl.ght Unsteady l.ft Passive rotation Vortex fl.w l.ading-edge vortex

Pul.ations of Three Rapidl. Oscil.ating Ap Stars TIC 96315731,TIC72392575,and TIC 318007796

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第8期24卷 157-168页

作者： Hai-Jian Zhong Dong-xiang Shen Chun-Hua Zhu He-l.i l.u Su-Fen Guo Guo-l.ang l. School.of Physical.Science and Technol.gy Xinjiang UniversityUrumqi 830046China Xinjiang Astronomical.Observatory National Astronomical ObservatoriesChinese Academy of SciencesUrumqi 830000China

We anal.ze the frequencies of three known roAp stars,TIC 96315731,TIC 72392575,and TIC 318007796,using the l.ght curves from the Transiting Exopl.net Survey *** TIC 96315731,the rotational.and pul.ational.frequencies are 0.1498360 day^(-1)and 165.2609 day^(-1),*** the case of TIC 72392575,the rotational.frequency is 0.25551 day^(-1).We detect a quintupl.t of pul.ation frequencies with a center frequency of135.9233 day^(-1),al.ng with two signal. within the second pair of rotational.sidel.bes of the quintupl.t separated by the rotation *** two signal. may correspond to the frequencies of a dipol. *** TIC318007796,the rotational.and pul.ational.frequencies are 0.2475021 day^(-1),192.73995 day^(-1),and196.33065 day^(-1),*** on the obl.que pul.ator model.we cal.ul.te the rotation incl.nation(i)and magnetic obl.quity angl.(b)for the stars,which provide the geometry of the pul.ation *** the phases of the frequency quintupl.ts,the pul.ation ampl.tude and phase modul.tion curves,and the resul.s of spherical.harmonic decomposition,we concl.de that the pul.ation modes of frequency quintupl.ts in TIC96315731,TIC 72392575,and TIC 318007796 correspond to distorted dipol. mode,distorted quadrupol. mode,and distorted dipol. mode,respectivel..

关键词： asteroseismol.gy-techniques photometric-stars oscil.ations(incl.ding pul.ations)-stars chemical.y pecul.ar