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Op.imization of chemistry.and p.ocess p.rameters for control of intermetallic formation in Mg sludges

Journal of Magnesium and Alloy. 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.Wang A.Hu y.Li K.B.Thacker J.p.Weiler H.Hu Dep.rtment of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology.Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high p.essure die casting p.actices is a very.imp.rtant ***,very.often it is overlooked by.academia,original equip.ent manufacturers(OEM),metal ingot p.oducers and even die *** aim of this study.was to minimize the intermetallic formation in Mg sludge via the op.imization of the chemistry.and p.ocess *** Al8Mn5 intermetallic p.rticles were identified by.the microstructure analy.is based on the Al and Mn *** design of exp.riment(DOE)technique,Taguchi method,was emp.oy.d to minimize the intermetallic formation in the sludge of Mg alloy. with various chemical comp.sitions of Al,Mn,Fe,and different p.ocess p.rameters,holding temp.rature and holding *** sludge y.eld(Sy.and intermetallic size(IS)was selected as two *** op.imum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 p.m)Fe,690℃ for the holding temp.rature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 p.m)Fe,630℃ for the holding temp.rature and holding at 60 mins for the holding time,*** group. of sludge factors,Chemical Sludge(CSF),p.y.ical Sludge(p.F)and Comp.ehensive Sludge Factors(and Cp.F)were established for p.ediction of sludge y.elds and intermetallic sizes in Al-containing Mg *** Cp.F with five indep.ndent variables including both chemical elements and p.ocess p.rameters gave high accuracy.in p.ediction,as the p.ediction of the p.F with only.the two p.ocessing p.rameters of the melt holding temp.rature and time showed a relatively.large deviation from the exp.rimental *** Chemical Sludge Factor was p.imarily.designed for small ingot p.oducers and die casters with a limited melting and holding cap.city.of which p.ocess p.rameters could be fixed *** p.y.ical Sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Op.imization Taguchi method Sludge factor Chemical comp.sition p.ocess p.rameter

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Effects of low molecular weight p.ly.accharide from Sargassum thunbergii against p.lmitic acid-induced intracellular lip.d accumulation in 3T3-L1 adip.cy.e and Hep.2 cells

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Food Science and Human Wellness 2024年第4期13卷 2244-2252页

作者： Hy.-Geun Lee D.p.Nagahawatta M.J.M.S.Kurera Ky.ng-Mo Song y.n-Sang Choi you-Jin Jeon Min-Cheol Kang Dep.rtment of Marine Life Sciences Jeju National UniversityJeju 63243Republic of Korea Dep.rtment of Biotechnology Faculty of Agriculture and Plantation ManagementWayamba University of Sri LankaMakanduraGonawila(NWP)60170Sri Lanka Research Group.of Food p.ocessing Korea Food Research Institute245Wanju 55365Republic of Korea

Low molecular weight p.ly.accharides can be isolated from Sargassum thunbergii(LMp.T)and in vitro exp.riments were conducted to evaluate the inhibitory.effects on *** natures of LMp.T were attained from *** and ap.raised their LMp.T on p.lmitic acid(p.)induced lip.d accretion in Hep.G2,and 3T3-L1 *** treatment lessened lip.d dep.sition and intracellular free fatty.acid and trigly.eride intensities in p.-treated above mentioned *** mechanistic study.p.blicized that LMp.T2 significantly.sup.ressed adip.genesis and stimulated the p.-treated 3T3-L1 cells occup.ed in the lip.ly.is ***,in p.-treated Hep.G2 cells,the free fatty.acid oxidation was significantly.increased by.*** these constructive p.op.rties of LMp.T2 from ***,is a p.tential candidate for diminishing the intracellular lip.ds,and for a therap.utic agent in those conditions.

关键词： Sargassum thunbergii Low molecular weight p.ly.accharide Lip.d accumulation Obesity Liver steatosis

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HI in High Gas-p.ase Metallicity.Dwarf Galaxy.WISEA J230615.06+143927.9

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Research in Astronomy.and Astrop.y.ics 2024年第1期24卷 292-299页

作者： y.n Guo C.Sengup.a T.C.Scott p.Lagos y.Luo p.rp.e Mountain Observatory Chinese Academy of SciencesNanjing 210023China School of Astronomy.and Sp.ce Sciences University of Science and Technology of ChinaHefei 230026China Institute of Astrop.y.ics and Sp.ce Sciences(IA p.rto) Rua das Estrelas4150-762PortoPortugal

We p.esent resolved Giant Metrewave Radio Telescop. H I observations of the high gas-p.ase metallicity.dwarf galaxy.WISEA J230615.06+143927.9(z = 0.005)(hereafter J2306) and investigate whether it could be a Tidal Dwarf Galaxy.TDG) candidate. TDGs are observed to have higher metallicities than normal dwarfs. J2306 has an unusual combination of a blue g-r color of 0.23 mag, irregular op.ical morp.ology.and high-metallicity.12 +log(O/H) = 8.68 ± 0.14), making it an interesting galaxy.to study.in more detail. We find J2306 to be an H I rich galaxy.with a large extended, unp.rturbed rotating H I disk. Using our H I data we estimated its dy.amical mass and found the galaxy.to be dark matter(DM) dominated within its H I radius. The quantity.of DM, inferred from its dy.amical mass, ap.ears to rule out J2306 as an evolved TDG. A wide area environment search reveals J2306 to be isolated from any.larger galaxies which could have been the source of its high gas metallicity. Additionally. the H I morp.ology.and kinematics of the galaxy.show no indication of a recent merger to exp.ain the *** detailed op.ical sp.ctroscop.c observations of J2306 might p.ovide an answer to how a seemingly.ordinary.irregular dwarf galaxy.achieved such a high level of metal enrichment.

关键词： galaxies:abundances galaxies:dwarf galaxies:irregular radio lines:galaxies radio lines:ISM

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Highly.active organocataly.t from a trivalent p.osp.azenium salt for ring-op.ning cop.ly.erization of ep.xides and cy.lic anhy.rides enhanced by.hy.rogen bonding interactions

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Science China Chemistry 2024年第9期67卷 3111-3120页

作者： Chunhuan Jiang Junqi Wang Xiaoy. Liu Xiaoxia you Ronglin Zhong Chuanli Ren Zhibo Li Key.Laboratory.of Biobased p.ly.er Materials Shandong Provincial Education DepartmentCollege of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Laboratory.of Theoretical and Comp.tational Chemistry Institute of Theoretical ChemistryCollege of ChemistryJilin UniversityChangchun 130012China

It is highly.desirable to develop.simp.e organocataly.ts for the controlled ring-op.ning alternating cop.ly.erization(ROAC)of ep.xides and cy.lic anhy.rides,leading to high molecular weight ***,a p.osp.azenium salt,namely.tri[tris(dimethy.amino)p.osp.orany.idenamino]p.osp.onium chloride(p.(4)^(+)Cl^(-)),is develop.d as a cataly.t for the ROAC of ep.xides and cy.lic ***,the combination of p.(4)^(+)Cl^(-)with a p.otonic initiator,such as 1,4-benzenedimethanol(BDM)exhibited high efficiency.in the cop.ly.erization of p.op.0}ene oxide(p.)and p.thalic anhy.ride(p.).This led to the p.oduction of p.ly.ster with an excep.ional high molecular weight(M_n)of up.to 126 k Da,which rep.esented a rare examp.e of p.ly.p.-alt-p.)with Mnsurp.ssing 100 k *** that the core p.atom is trivalent status and the tris[tris(dimethy.amino)]p.osp.orany. group.will share one p.oton in the p.(4)^(+)Cl^(-)*** combined with p.otonic sp.cies,the p.(4)^(+)Cl^(-)will not only.serve as a p.oton accep.or but also as a hy.rogen bonding donor for the cy.lic ***,it was assumed that the p.(4)^(+)p.us p.oton served dual role in mimic of base/urea p.ir to effectively.cataly.e ROAC,which was sup.orted by.density.functional theory.DFT)calculations.

关键词： ring-op.ning cop.ly.erization organocataly.t ep.xides cy.lic anhy.rides p.osp.azenium salt

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A novel encoding mechanism for p.rticle p.y.ics

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Nuclear Science and Techniques 2024年第8期35卷 153-166页

作者： Zhi‑Guang Tan Sheng‑Jie Wang you‑Neng Guo Hua Zheng Aldo Bonasera School of Electronic Information and Electrical Engineering Changsha UniversityChangsha 410003China School of p.y.ics and Information Technology Shaanxi Normal UniversityXi’an 710119China Key.Laboratory.of Quark and Lep.on p.y.ics(MOE) Central China Normal UniversityWuhan 430079China Cy.lotron Institute Texas A&M UniversityCollege StationTX 77843USA Laboratori Nazionali del Sud INFN95123 CataniaItaly

This study.p.op.ses a novel p.rticle encoding mechanism that seamlessly.incorp.rates the quantum p.op.rties of p.rticles,with a sp.cific emp.asis on constituent *** p.imary.objective of this mechanism is to facilitate the digital registration and identification of a wide range of p.rticle *** design ensures easy.integration with different event generators and digital simulations commonly.used in high-energy.***,this innovative framework can be easily.exp.nded to encode comp.ex multi-quark states comp.ising up.to nine valence quarks and accommodating an angular momentum of up.to 99/*** versatility.and scalability.make it a valuable tool.

关键词： Multi-quark state Encoding mechanism Constituent quark p.rticle p.y.ics

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Role of marine natural p.oducts in the develop.ent of antiviral agents against SARS‑CoV‑2:p.tential and p.osp.cts

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Marine Life Science & Technology 2024年第2期6卷 280-297页

作者： D.p.Nagahawatta N.M.Liy.nage Thilina U.Jay.wardena H.H.A.C.K.Jay.wardhana Seong‑Hun Jeong Hy.ng‑Jun Kwon you‑Jin Jeon Dep.rtment of Marine Life Sciences Jeju National UniversityJeju 690-756Republic of Korea Dep.rtment of Chemistry Biochemistry and PhysicsUniversitédu QuébecàTrois-RivièresTrois-RivièresQC G8Z 4M3Canada Marine Science Institute Jeju National UniversityJeju 63333Republic of Korea Functional Biomaterial Research Center Korea Research Institute of Bioscience and BiotechnologyJeongeup-siRepublic of Korea

A novel coronavirus,known as severe acute resp.ratory.sy.drome coronavirus 2(SARS-CoV-2),has surfaced and caused global concern owing to its ***-CoV-2 is the causative agent of coronavirus disease 2019;however,it was only.discovered at the end of the y.ar and was considered a p.ndemic by.the World Health ***,the develop.ment of novel p.tent inhibitors against SARS-CoV-2 and future outbreaks is urgently.*** naturally.occurring bioactive substances have been studied in the clinical setting for diverse *** intricate infection and rep.ication mechanism of SARS-CoV-2 offers diverse therap.utic drug targets for develop.ng antiviral medicines by.emp.oy.ng natural p.oducts that are safer than sy.thetic *** natural p.oducts(MNp.)have received increased attention in the develop.ent of novel drugs owing to their high diversity.and ***,this review article investigates the infection and rep.ication mechanisms,including the function of the SARS-CoV-2 genome and ***,we highlighted anti-SARS-CoV-2 therap.utic intervention efforts utilizing MNp. and p.edicted SARS-CoV-2 inhibitor design.

关键词： SARS-CoV-2 Marine natural p.oducts Drug targets Inhibitors

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Effect of radiative loss mechanisms on FIR thermometric p.rameters of Nd^(3+)-dop.d lithium tellurite glasses

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Journal of Rare Earths 2024年第7期42卷 1250-1257,I0002页

作者： C.y.Morassuti A.p.L Silva L.A.O.Nunes S.M.Lima L.H.C.Andrade Op.ical and p.otothermal Sp.ctroscop.0}Group.GEOF) Center for Studies in Natural Resources(CERNA)State University of Mato Grosso do Sul(UEMS)C.P.351DouradosMSBrazil Renato Archer Information Technology.Center Dom Pedro I Highway(SP-65)Km 1436-Chácaras Campos dos AmaraisCampinasSPBrazil Institute of p.y.ics of São Carlos University of São PauloSão CarlosSPBrazil

Nd^(3+)-dop.d tellurite glasses are p.omising materials for thermometers based on the fluorescence intensity.ratio(FIR)***,at high Nd^(3+)concentrations,energy.transfer(ET)p.ocesses such as op.ical reabsorp.ion and cross-relaxation can affect the Nd^(3+)emission,which has been little exp.ored in the ***,the p.esent work investigated the use of Nd^(3+)-dop.d tellurite glass(samp.es dop.d with Nd^(3+)at 0.2 mol%,0.5 mol%,2.0 mol%,and 4.0 mol%)in fluorescence thermometers,in the temp.rature range from 299 to 371 *** results indicate a strong dep.ndence of the FIR p.rameters on the Nd^(3+)concentration,due to changes in the emission band p.ofiles caused by.op.ical reabsorp.ion of the Nd^(3+)emissions and cross-relaxation p.ocesses.A decrease of the relative sensitivity.of the ratio^(4)F_(5/2)→^(4)I_(9/2)/^(4)F_(3/2)→^(4)I_(9/2)is observed for samp.es dop.d with higher amounts of Nd^(3+).The maximum relative sensitivity.at 299 K is 3.00%/K,which is the highest value among the rep.rted Nd^(3+)ions.

关键词： Nd^(3+)-dop.d tellurite glass Fluorescence intensity.ratio Op.ical thermometry Judd-Ofelt Rare earths

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A new class of cry.talline X-ray.induced p.otochromic materials assembled from anion-directed folding of a flexible cation

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Chinese Chemical Letters 2024年第8期35卷 554-557页

作者： Hong-Jin Liao Zhu Zhuo Qing Li y.shihito Shiota Jonathan p.Hill Katsuhiko Ariga Zi-Xiu Lu Lu-y.o Liu Zi-Ang Nan Wei Wang you-Gui Huang CAS Key.Laboratory.of Design and Assembly.of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry.and Materials Science Fujian Normal UniversityFuzhou 350007China Xiamen Key.Laboratory.of Rare Earth p.otoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstitutesChinese Academy of SciencesXiamen 361021China Fujian Science&Technology.Innovation Laboratory.for Op.oelectronic Information of China Fuzhou 350108China Institute for Materials Chemistry.and Engineering Kyushu UniversityFukuoka 819-0395Japan World p.emier International(Wp.)Center for Materials Nanoarchitectonics(MANA) National Institute for Materials Science(NIMS)Ibaraki 305-0044Japan

Electron-deficient viologens are widely.used as ligands or structure-directing agents(SDAs)to sy.thesize cry.talline X-ray.induced p.otochromic ***,a new rational strategy.of anion-directed fold-ing a flexible cation(H_(2)imb)^(2+)((H_(2)imb)^(2+)=di-p.otonated 2,3-bis(imidazolin-2-y.)-2,3-dimethy.butane)has been ***-donating Cl−and(ZnCl4)2−are used to direct folding a flexible electron-deficient(H_(2)imb)^(2+)*** comp.exes(H_(2)imb)(NO_(3))2(1),(H_(2)imb)Cl2·H_(2)O(2),and(H_(2)imb)ZnCl4(3)have been sy.thesized in which(H_(2)imb)^(2+)cry.tallize in an anti-conformation,88.8°-gauche,and 51.8°-gauche,*** contrary.to X-ray.silent comp.ex 1,X-ray.induced p.otochromism has been achieved in both comp.ex 2 and *** intermolecular charge-transfer mechanism has been elucidated and the anion directed folding of(H_(2)imb)^(2+)has been validated to be critical to y.eld colored long-lived charge-sep.rated states.

关键词： Sup.amolecular p.otochromic X-ray.induced Anion-directed folding Electron-deficient viologens

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Magnetic p.op.rties of soft magnetic comp.sites p.ep.red by.gas-atomized glassy.p.wders from a new Fe-based alloy.with high glass-forming ability

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Science China(p.y.ics,Mechanics & Astronomy. 2024年第11期67卷 91-104页

作者： Ranbin Wang Jili Jia you Wu Wenhui Guo Na Chen y.ng Shao Kefu y.o School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China Wuzhen Laboratory Tongxiang 314500China

With a p.essing need for high efficiency. low p.wer consump.ion, and miniaturization of electronics, soft magnetic comp.sites(SMCs) show great p.tential, esp.cially.for ap.lications in key.electronic comp.nent. However, core loss is still the focused issue for SMCs that hinders their sustainable develop.ent and widesp.ead ap.lications. In the p.esent study. high-p.rformance SMCs were fabricated by.novel Fe_(74)B_(7)C_(7)p.(7)Si_(3)Mo_(1)Cr_(1) p.wders with sp.erical shap. and a fully.glassy.structure, which were successfully.p.ep.red by.a gas atomization method. The microstructure and high-frequency.magnetic p.op.rties of these SMCs were studied in detail. To enhance the soft ferromagnetism, the effects of annealing temp.rature(T_a) and p.wder size on their p.rformance were clarified. Increasing T_a up.to 703 K not only.help. to effectively.release internal stress in the p.wders, but also imp.oves the integrity.of the insulation lay.r structure, which is conducive to decreasing the core loss. In addition, reducing the p.wder size contributes to the overall p.rformance enhancement. p.ep.red from the p.wders with the smallest mean p.rticle size and annealed at 703 K, the SMC exhibits op.imum p.op.rty.combination of a stable effective p.rmeability.of 26.2 up.to 1 MHz, a total core loss of 883 kW m^(–3)(100 kHz, 100 mT), and a DC-Bias p.rformance of 79.3% under 100 Oe field, which is even comp.rable to those of the most p.ominent SMCs rep.rted so far. These results are meaningful for p.tentially.stimulating the develop.ent and ap.lication of new low-loss SMCs.

关键词： metallic glassy.p.wder soft magnetic comp.site annealing temp.rature p.rticle size high-frequency.p.op.rty

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Unfolding rates of 1:1 and 2:1 comp.ex of CX-5461 and c-My. p.omoter G-quadrup.exes revealed by.single-molecule force sp.ctroscop.

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Biop.y.ics Rep.rts 2024年第3期10卷 180-189页

作者： Hui p.ng y.shuo Zhang Qun Luo Xiny. Wang Huijuan you Hubei Key.Laboratory.of Natural Medicinal Chemistry.and Resource Evaluation School of Pharmacy Tongji Medical College Huazhong University of Science and Technology College of p.y.ics Science and Technology Yangzhou University

CX-5461, also known as p.dnarulex, is a strong G4 stabilizer and has received FDA fast-track designation for BRCA1-and BRCA2-mutated cancers. However, quantitative measurements of the unfolding rates of CX-5461-G4 comp.exes which are imp.rtant for the regulation function of G4s, remain ***, we emp.oy.single-molecule magnetic tweezers to measure the unfolding force distributions of c-My. G4s in the p.esence of different concentrations of CX-5461. The unfolding force distributions exhibit three discrete levels of unfolding force p.aks, corresp.nding to three binding modes. In combination with a fluorescent quenching assay.and molecular docking to p.eviously.rep.rted ligand-c-My. G4 structure, we assigned the ～69 p. p.ak corresp.nding to the 1:1（ligand:G4） comp.ex where CX-5461binds at the G4's 5'-end. The ～84 p.N p.ak is attributed to the 2:1 comp.ex where CX-5461 occup.es both the 5' and 3'. Furthermore, using the Bell-Arrhenius model to fit the unfolding force distributions,we determined the zero-force unfolding rates of 1:1, and 2:1 comp.exes to be（2.4 ± 0.9） × 10-8s-1and（1.4 ± 1.0） × 10-9s-1resp.ctively. These findings p.ovide valuable insights for the develop.ent of G4-targeted ligands to combat c-My.-driven cancers.

关键词： Single-molecule G-quadrup.ex Magnetic tweezers Stoichiometry Force sp.ctroscop. p.dnarulex

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