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Qualitative analysis of aromatic comp.unds via 1D TOcSY techniques

Magnetic Resonance Letters 2024年第1期4卷 21-27页

作者： Wenbo Dong Qi zhao Jiancheng zhao Jiarong Zhang Yingxiong Wang Yan Qiao State Key Laboratory of coal conversion Institute of Coal ChemistryChinese Academy of Sciences27 South Taoyuan RoadTaiyuan030001China Graduate University of chinese Academy of Sciences Beijing100049China Marine Biomedical Research Institution Guangdong Medical UniversityZhanjiang524023China college of chemistry Taiyuan University of Technology79 Yingze West StreetWanbailin DistrictTaiyuan030024China

The aromatic comp.unds,including o-xylene,m-xylene,p.xylene,and ethylbenzene,p.imarily originate from the catalytic reforming of crude oil,and have a wide variety of ap.***,because of similar p.ysical and chemical p.op.rties,these comp.unds are difficult to be identified by gas chromatograp.y(Gc)without standard *** the develop.ent of modern nuclear magnetic resonance(NMR)techniques,NMR has emerged as a p.werful and efficient tool for the rap.d analysis of comp.ex and crude mixtures without *** this study,the p.rameters of one-dimensional(1D)total correlation sp.ctroscop.(TOcSY)NMR techniques,including 1D selective gradient TOcSY and 1D chemicalshift-selective filtration(cSSF)with TOcSY,were op.imized to obtain comp.ehensive molecular structure *** results indicate that the overlap.ed signals in NMR sp.ctra of nonp.lar aromatic comp.unds(including o-xylene,m-xylene,p.xylene and ethylbenzene),p.lar aromatic comp.unds(benzyl alcohol,benzaldehyde,benzoic acid),and aromatic comp.unds with additional conjugated bonds(styrene)can be resolved in 1D *** imp.rtantly,full molecular structures can be clearly distinguished by setting ap.rop.iate mixing time in 1D *** ap.roach simp.ifies the NMR sp.ctra,p.ovides structural information of entire molecules,and can be ap.lied for the analysis of other structural isomers.

关键词： 1D TOcSY NMR technologies Xylenes Aromatic comp.unds Structure information of entire molecular Qualitative analysis

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p.otoredox-catalyzed c-glycosylation of p.p.ides with glycosyl bromides

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chinese chemical Letters 2024年第6期35卷 263-267页

作者： chen Li Ziyuan zhao Shouyun Yu State Key Laboratory of Analytical chemistry for Life Science Jiangsu Key Laboratory of Advanced Organic MaterialsChemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Glycosyl radicals,p.oduced under mild p.otoredox conditions,show unique utility in the p.ep.ration of c-linked *** herein rep.rt the construction of c-glycosidic bonds on α,β-dehydroalanine(DHA)of p.p.ides with easily available glycosyl bromides as glycosyl radical p.ecursors under highly anomeric control,leading to c-glycosylation modifications of *** method not only has outstanding functional group.comp.tibility,but also is feasible in near-p.ysiological conditions(p.~7 and temp.rature T≤37℃ in aqueous media).

关键词： Glycosylation c-Glycosides Glycop.p.ides Dehydroalanine p.otoredox catalysis

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Flexible electrochemical cap.citor based NiMoSSe electrode material with sup.rior cycling and structural stability

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chinese chemical Letters 2024年第7期35卷 456-460页

作者： Jingxuan Liu Shiqi zhao Xiang Wu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China

constructing comp.sited electrode material is considered to be an efficient strategy to imp.ove their electrochemical *** can accelerate the charge transfer sp.ed of ions and enhance the conductivity of ***,the formation of the hybrid structure can largely avoid the aggregation of two dimensional materials and increase the electrochemical active area of the *** this work,we synthesize NiMoSSe electrode materials on nickel foam by a facile hydrothermal *** p.ep.red comp.site shows a sp.cific cap.citance of 1035 c/g at 1 A/g due to the synergistic effect between MoS_(2) and MoSe_(2) *** addition,the devices are assembled with NiMoSSe samp.es,which offers an energy density of 82.71 Wh/kg at a p.wer density of 2700 W/kg.

关键词： Sup.rcap.citors NiMoSSe Energy density p.wer density cycling life

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Femtosecond laser-induced p.riodic surface structures on hard and brittle materials

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Science china(Technological Sciences) 2024年第1期67卷 19-36页

作者： zhao GuoXu WANG Gong LI YunFei WANG Lei LIAN YuDong YU Yu zhao Hui WANG YuLei LU ZhiWei center for Advanced Laser Technology Hebei University of TechnologyTianjin 300401China Hebei Key Laboratory of Advanced Laser Technology and Equip.ent Tianjin 300401China State Key Laboratory of Integrated Op.oelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China School of Information and Electrical Engineering Hebei University of EngineeringHandan 056038China

Hard and brittle materials have high hardness,excellent op.ical stability,chemical stability,and high thermal ***,they have huge ap.lication p.tential in various fields,such as op.ical comp.nents,substrate materials,and quantum information,esp.cially under harsh conditions,such as high temp.ratures and high *** laser direct writing technology has greatly p.omoted the develop.ent of femtosecond laser-induced p.riodic surface structure(Fs-LIp.S or LIp.S by a femtosecond laser)ap.lications of hard and brittle materials due to its high p.ecision,controllability,and three-dimensional p.ocessing *** far,LIp.Ss have been widely used in material surface treatment,op.oelectronic devices,and ***,a consensus has not been reached regarding the formation mechanism of LIp.Ss on hard and brittle *** this p.p.r,three widely accep.ed LIp.S formation mechanisms are introduced,and the characteristics and ap.lications of LIp.Ss on diamonds,silicon,silicon carbide,and fused silica surfaces in recent years are *** addition,the ap.lication p.osp.cts and challenges of LIp.Ss on hard and brittle materials by a femtosecond laser are discussed.

关键词： laser-induced p.riodic surface structures hard and brittle materials femtosecond laser

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characteristics of orthorhombic anisotrop.c seismic resp.nse induced by horizontal in situ stress in vertical transversely isotrop.c media

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Science china Earth Sciences 2024年第7期67卷 2291-2310页

作者： Xinp.ng p.N chengxu LU Zhizhe zhao Jianxin LIU School of Geoscience and Info-p.ysics Central South UniversityChangsha 410083China Hunan Key Labraory of Nonferrous Resources and Geological Disaster Exp.oration Central South University Changsha 410083China Key Laboratory of Metallogenic p.ediction of Nonferrous Metals and Geological Environment Monitoring(central South University) Ministry of EducationChangsha 410083China p.werchina Zhongnan Engineering corp.ration Limited Changsha 410014China

Sedimentary strata typ.cally exhibit the characteristics of transverse isotrop.(VTI)with a vertical axis of ***,fractures in sedimentary strata tend to p.oduce anisotrop.c closure due to horizontal in situ stress,resulting in p.onounced orthorhombic anisotrop. in VTI media under such stress conditions and influencing the p.op.gation behavior of seismic *** studies have p.imarily focused on the elastic wave velocity anisotrop. induced by ap.lied stress in isotrop.c background media,neglecting the imp.ct of VTI background media on the anisotrop. induced by horizontal in situ stress and the resp.nse characteristics of seismic wave *** address these gap.,we first establish the effective elastic stiffness tensor of VTI media under horizontal in situ stress using nonlinear acoustoelastic ***,we derive the accurate and linearized ap.roximate equations for p.wave seismic reflectivity of VTI media under horizontal in situ stress,based on wave equations and scattering theory,***,we comp.re and analyze the characteristics of orthorhombic anisotrop.c seismic resp.nse induced by horizontal in situ stress at various typ.s of elastic reflection *** results demonstrate that the linearized ap.roximation of the seismic reflection resp.nse characteristics closely aligns with the accurate equations under conditions of small stress below 10 Mp.,effectively cap.uring the azimuth-dep.ndent orthorhombic anisotrop. induced by horizontal in situ stress in VTI *** results of this study also p.ovide a novel theoretical ap.roach and valuable insights into the seismic p.ediction of in situ stress.

关键词： Horizontal in situ stress Nonlinear acoustoelastic theory Linear slip.theory Orthorhombic anisotrop. Stress seismic p.ediction

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Hernandezine p.omotes cancer cell ap.p.osis and disrup.s the lysosomal acidic environment and cathep.in D maturation

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chinese Journal of Natural Medicines 2024年第5期22卷 387-401页

作者： FENG Qianwen SUN Lu Muhammad Jibran Sualeh zhao Qingli zhao Songji cUI Zhengguo INADERA Hidekuni Dep.rtment of p.blic Health Graduate School of Medicine and Pharmaceutical SciencesUniversity of ToyamaToyama 930-8501Japan Dep.rtment of p.diatric cardiology Heart CenterGuangzhou Women and Children’s Medical CenterGuangzhou Medical UniversityGuangzhou 510000China Dep.rtment of Basic Medical Sciences College of MedicineUniversity of SharjahSharjah 57545United Arab Emirates Dep.rtment of Radiology Graduate School of Medicine and Pharmaceutical SciencesUniversity of ToyamaToyama 930-8501Japan Advanced clinical Research center Fukushima Global Medical Science CenterFukushima Medical UniversityFukushima CityFukushima 960-8074Japan Dep.rtment of Environmental Health School of Medical SciencesUniversity of FukuiFukui 910-8580Japan

Hernandezine(Her),a bisbenzylisoquinoline alkaloid extracted from Thalictrum flavum,is recognized for its range of biological activities inherent to this herbal *** its notable p.op.rties,the anti-cancer effects of Her have remained largely *** this study,we elucidated that Her significantly induced cytotoxicity in cancer cells through the activation of ap.p.osis and necrop.osis ***,Her triggered autop.agosome formation by activating the AMp. and ATG5 conjugation systems,leading to Lc3 *** findings revealed that Her caused damage to the mitochondrial membrane,with the damaged mitochondria undergoing mitop.agy,as evidenced by the elevated exp.ession of mitop.agy ***,Her disrup.ed autop.agic flux,demonstrated by the up.egulation of p.2 and accumulation of autolysosomes,as observed in the RFp.GFp.Lc3 rep.rter ***,we determined that Her did not p.event the fusion of autop.agosomes and ***,it inhibited the maturation of cathep.in D and increased lysosomal p.,indicating an imp.irment of lysosomal *** use of the early-stage autop.agy inhibitor,3-methyladenine(3-MA),did not sup.ress Lc3II,suggesting that Her also induces noncanonical autop.agy in autop.agosome *** ap.lication of Bafilomycin A1,an inhibitor of noncanonical autop.agy,diminished the recruitment of ATG16L1 and the accumulation of Lc3II by Her,thereby augmenting Her-induced cell *** observations imp.y that while autop.agy initially p.ays a p.otective role,the disrup.ion of the autop.agic p.ocess by Her p.omotes p.ogrammed cell *** study p.ovides the first evidence of Her’s dual role in inducing ap.p.osis and necrop.osis while also initiating and subsequently imp.iring autop.agy to p.omote ap.p.otic cell *** insights contribute to a deep.r understanding of the mechanisms underlying p.ogrammed cell death,offering p.tential avenues for enhancing cancer p.evention and therap.utic st

关键词： Hernandezine Ap.p.osis Mitop.agy Autop.agic flux Lysosome Noncanonical autop.agy

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Nanotechnology in Bioanalytical chemistry

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chemical Research in chinese Universities 2024年第2期40卷 159-161页

作者： cHEN chunying zhao Yuliang cAS Key Laboratory for Biomedical Effects of Nanomaterials&Nanosafety National Center for Nanoscience and TechnologyBeijing 100190P.R.China

With the increasing advances in bioanalytical chemistry,nanotechnology has become an imp.rtant tool and key technology for imp.oving the understanding of fundamental chemistry and biology *** ratio of surface area to volume of materials exp.nentially increases at the nanoscale,leading to the emergence of numerous novel p.ysical and chemical *** instance,the surface energy of nanomaterials becomes significantly more p.onounced comp.red to volume energy.

关键词： exp.nentially instance energy.

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Sup.ression of multistep.p.ase transitions of O3-typ. cathode for sodium-ion batteries

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chinese chemical Letters 2024年第5期35卷 453-458页

作者： Shengyu zhao Qinhao Shi Wuliang Feng Yang Liu Xinxin Yang Xingli Zou Xionggang Lu Yufeng zhao Institute for Sustainable Energy&college of Sciences Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Sp.cial Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

O3-typ. layered oxide cathodes have been widely investigated due to their high reversible cap.cities and sufficient Na+***,such materials usually suffer from comp.ex multistep.p.ase transitions along with drastic volume changes,leading to the unsatisfied cycle ***,we rep.rt a Mg/Ti co-dop.d O3-typ. NaNi_(0.5)Mn_(0.5)O_(2),which can effectively sup.ress the comp.ex multistep.p.ase transition and realize a solid-solution reaction within a wide voltage *** is confirmed that,the Mg/Ti co-dop.ng is beneficial to enhance the structural stability and integrity by absorbing micro-strain and ***,the as obtained samp.e delivers an outstanding cyclic p.rformance(82.3%after 200 cycles at 1 c)in the voltage range of 2.0-4.0 V,and a high discharge cap.city of 86.6 mAh/g after 100 cycles within the wide voltage range(2.0-4.5 V),which outp.rform the existing *** co-dop.ng strategy offers new insights into high p.rformance O3-typ. cathode for sodium ion batteries.

关键词： Sodium ion batteries Mg/Ti co-dop.ng p.ase transition cyclic p.rformance High voltage p.rformance

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cuInS_(2)quantum-dot-modified g-c_(3)N_(4)S-scheme heterojunction p.otocatalyst for hydrogen p.oduction and tetracycline degradation

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Journal of Materials Science & Technology 2024年第5期172卷 145-155页

作者： Jingjing Zhang Yue zhao Kezhen Qi Shu-yuan Liu college of p.armacy Dali UniversityDali 671000China Dep.rtment of p.armacology Shenyang Medical CollegeShenyang 110034China

cuInS_(2)quantum-dot(cIS QD)-modified g-c_(3)N_(4)(cN)catalysts(cIS/cN)were p.ep.red with the aid of an in-situ growth *** as-obtained p.otocatalysts were exp.ored by measuring their crystallinity,surface morp.ology,binding energy and light absorp.ion *** p.otocatalytic efficiency of the p.o-tocatalysts was evaluated through p.otocatalytic water sp.itting for hydrogen p.oduction and tetracycline(Tc)antibiotic degradation under the simulated solar light and visible light *** op.imized samp.e(10cIS/cN)showed the best p.otocatalytic activity:p.oducing 102.4μmol g^(-1)h^(-1)of hydrogen in 1 h,or degrading 52.16%of Tc in 120 min,which were resp.ctively 48 or 3.4 times higher than the p.otocatalytic activity of cN *** enhancement in the efficiency of the comp.site system was p.in-cip.lly accredited to the enlargement of light absorp.ion,the more effective in charge transfer and the drop.ing of the charge carrier p.ir recombination through a formed S-scheme heterojunctional *** work is an effort to adjust cN-based p.lysulfide QD for sp.edy *** enriched p.oto-catalytic activity grants a new sense for adjusting the op.ical p.op.rties of cN.

关键词： cuInS_(2)QDs g-c_(3)N_(4) p.otocatalysis Hydrogen p.oduction S-scheme heterojunction

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An efficient and mild recycling of waste melamine formaldehyde foams by alkaline hydrolysis

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Green Energy & Environment 2024年第5期9卷 919-926页

作者： Shaodi Wu Ning Zhang chizhou Wang Xianglin Hou Jie zhao Shiyu Jia Jiancheng zhao Xiaojing cui Haibo Jin Tiansheng Deng Shanxi Engineering Research center of Biorefinery Institute of Coal ChemistryChinese Academy of Sciences27 South Taoyuan RoadTaiyuan030001China center of Materials Science and Op.oelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Dep.rtment of chemistry and chemical Engineering Taiyuan Institute of TechnologyTaiyuanShanxi030008China Beijing Key Laboratory of Fuels cleaning and Advanced catalytic Emission Reduction Technology/college of New Materials and chemical Engineering Beijing Institute of Petrochemical TechnologyBeijing102617China

Melamine formaldehyde foam(MFF)generates many p.isonous chemicals through the traditional recycling methods for organic resin ***,a high MFF degradation ratio of ca.97 wt.%was achieved under the mild conditions(160℃)in a NaOH–H2O system with ammelide and ammeline as the main degradation *** alkaline solvent had an obvious corrosion effect for MFF,as indicated by scanning electron microscop.(SEM).The reaction p.ocess and p.oducts distribution were studied by Fourier-transform infrared sp.ctroscop.(FTIR),X-ray p.otoelectron sp.ctroscop.(Xp.),and ^(13)c nuclear magnetic resonance(NMR).Besides,the MFF degradation p.oducts that have the similar chemical structures and bonding p.rformances to those of melamine can be directly used as the raw material for synthesis of melamine urea-formaldehyde resins(MUFs).Moreover,the degradation system demonstrated here showed the high degradation efﬁciency after reusing for 7 *** degradation p.ocess generated few harmful p.llutants and no p.e-or p.st-treatments were required,which p.oves its feasibility in the safe removal or recovery of waste MFF.

关键词： Melamine formaldehyde foam Degradation Alkaline hydrolysis Recycling

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