检索结果-南通市图书馆

Pharmacology & Pharmacy 2010年第2期1卷 69-74页

作者： Olga G. Sitnikov. Sergey B. Nazarov.Irina v. Shikhanov. alexander v. agafonov Jean A. Dyuzhev.rina G. Popov. 不详

In this study inv.stigation of influence of hybrid nanosilica-polyethylene glycols materials (molecular weight 1500, 6000 and 15000), prepared by sol-gel synthesis, on lipid peroxidation and antioxidant activ.ty of human serum in v.tro was performed. Methods included chemiluminescence analysis and quantitativ. malonic dialdehyde estimation. It was rev.aled that nanosilica-PEG materials with different molecular weight had certain biological activ.ty. Powders of SiO2-PEG 1500 and SiO2-PEG 6000 manifest prooxidant effects, whereas mesoporous (calcine) powders produced antioxidant effects in blood serum in v.tro.

关键词： Free-Radical Oxidation Nanosilica Chemiluminescence Malonic Dialdehyde

Unv.iling the atomic-scale transition between light harv.sting and photoprotectiv. states in plant photosynthesis

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

Science China Chemistry 2024年第5期67卷 1375-1377页

作者： alexander v.Ruban School of Biological and Behav.oural Sciences Queen Mary University of LondonLondon E14NSUK

Non-photochemical chlorophyll fluorescence quenching(NPQ) stands as a cornerstone in the realm of photosynthesis research, attracting generations of dedicated scientists in their quest to unrav.l its mysteries. This mechanism, crucial for safeguarding photosynthesis, plays a piv.tal role in regulating light harv.sting, particularly in oxygenic photosynthesis where the oxygen-ev.lv.ng photosystem II (PSII)is susceptible to photodamage [1].

关键词： harv.sting protectiv. attracting

Parasites of the liv.r:A global problem?

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2024年第30期30卷 3554-3559页

作者： v.adislav.v.Tsukanov.alexander v.v.syutin Julia L Tonkikh Clinical Department of the Digestiv. System Pathology of Adults and Children Federal Research Center“Krasnoyarsk Science Center”of the Siberian Branch of the Russian Academy of SciencesScientific Research Institute of Medical Problems of the NorthKrasnoyarsk 660022Russia

Parasitic liv.r diseases can be caused by trematodes,cestodes,nematodes,and *** pathology is significant because millions of people in different parts of the world hav. liv.r parasites,which can manifest themselv.s in the dev.lopment of inflammation,liv.r cysts,cholecystitis,cholelithiasis,pancreatitis and liv.r cirrhosis that are often threatening their *** International Agency for Research on Cancer considers three species of trematodes,Schistosoma haematobium,Opisthorchis v.v.rrini and Clonorchis sinensis,to be *** modern examination methods,in some cases including extensiv. screening of large populations,are required for diagnosing liv.r *** of parasitic liv.r diseases is differentiated and can inv.lv. a combination of surgical and therapeutic *** is no doubt that the clinical and epidemiological scale allows one to regard parasitic liv.r diseases as a global healthcare problem.

关键词： Liv.r Parasites Epidemiology Diagnosis Clinics Treatment Echinococcosis Opisthorchiasis Fascioliasis Schistosomiasis

Interatomic Interaction Models for Magnetic Materials:Recent Adv.nces

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 Physics Letters 2024年第6期41卷 54-66页

作者： Tatiana S.Kostiuchenko alexander v.Shapeev.Iv.n S.Nov.kov Emanuel Institute of Biochemical Physics RAS 4 Kosygin StreetMoscow119334Russian Federation Independent inv.stigator

Atomistic modeling is a widely employed theoretical method of computational materials *** has found particular utility in the study of magnetic ***,magnetic empirical interatomic potentials or spinpolarized density functional theory(DFT)serv.d as the primary models for describing interatomic interactions in atomistic simulations of magnetic ***,in recent years,a new class of interatomic potentials known as magnetic machine-learning interatomic potentials(magnetic MLIPs)has *** MLIPs combine the computational efficiency,in terms of CPU time,of empirical potentials with the accuracy of DFT *** this rev.ew,our focus lies on prov.ding a comprehensiv. summary of the interatomic interaction models dev.loped specifically for inv.stigating magnetic *** also delv. into the v.rious problem classes to which these models can be ***,we offer insights into the future prospects of interatomic interaction model dev.lopment for the exploration of magnetic materials.

关键词： materials interaction empirical

Electrostatic Interaction-directed Construction of Hierarchical Nanostructured Carbon Composite with Dual Electrical Conductiv. Networks for Zinc-ion Hybrid Capacitors with Ultrastability

在线全文

学校读者我要写书评

暂无评论

Energy & Env.ronmental Materials 2024年第1期7卷 188-196页

作者： Changyu Leng Zongbin Zhao Xuzhen Wang Yuliya v.Fedoseev. Lyubov.G.Bulushev. alexander v.Okotrub Jian Xiao Jieshan Qiu State Key Lab of Fine Chemicals School of Chemical Engineering Liaoning Key Lab for Energy Materials and Chemical Engineering Dalian University of Technology Nikolaev.Institute of Inorganic Chemistry Siberian Branch of the Russian Academy of Sciences College of Chemical Engineering Beijing University of Chemical Technology

Metal-organic framework(MOF)-deriv.d carbon composites hav. been considered as the promising materials for energy ***,the construction of MOF-based composites with highly controllable mode v.a the liquid-liquid synthesis method has a great challenge because of the simultaneous heterogeneous nucleation on substrates and the self-nucleation of indiv.dual MOF nanocrystals in the liquid phase.

关键词： carbon composite electrostatic interaction metal–organic framework coating self-assembly zinc-ion hybrid capacitor

Praseodymium metal nanorods as a 5-fluorouracil carrier

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第7期42卷 1328-1336,I0005页

作者： v.rnitha Manikantan Gov.ndaraj Sri v.ralakshmi Ujma Ashapak Tamboli Archana Sumohan Pillai Aleyamma alexander Anushka Lucas Bose Allben Akash Israel v.M.v.Enoch Centre for Nanoscience and Genomics Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia Department of Applied Chemistry Karunya Institute of Technology and Sciences(Deemed University)Coimbatore641114Tamil NaduIndia

Interest in metal nanoparticles as nanoscale drug-carrying v.hicles has been *** such an aspect,lanthanide metal nanoparticles are particularly ***,we report praseodymium nanoparticles as a nov.l anticancer therapeutic transporting *** material was made as a composite with the supramolecular host polymer,poly-β-*** praseodymium nanorods were characterized using standard analytical techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and thermograv.metric analysis(TGA).In addition,they were imaged using transmission electron *** nanostructures are a long rod-shaped material with 2.0±0.1μm in length and 230±10 nm in *** material shows a saturation magnetization v.lue abov. 30 emu/g with a coerciv.ty v.lue of 130 *** nanocarrier is freighted with the drug 5-fluorouracil,and the encapsulation efficiency is 76.09%.The drug release is continuous from the nanocarrier(polymer-containing praseodymium nanoparticles)and proceeds for abov. 250 *** in v.tro cytotoxicities of the blank nanocarrier and the 5-fluorouracil-loaded one are deduced by testing them on MCF-7 and v.ro(non-cancerous)cell *** cytotoxicity on the cancerous cell lines is observ.d,whereas the non-cancerous cells are *** IC_(50)v.lues on the cell lines are reported.

关键词： Metal nanoparticles Praseodymium Poly-cyclodextrin Drug deliv.ry Anticancer activ.ty Rare earths

同方期刊数据库

Cluster Analysis of the Roma-BZCAT Blazars

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5期24卷 117-139页

作者： Dmitry O.Kudryav.sev.Yulia v.Sotnikov. v.adislav.A.Stolyarov.Timur v.Mufakharov.v.lery v.v.asyuk Margarita L.Khabibullina alexander G.Mikhailov.Yulia v.Cherepkov. Special Astrophysical Observ.tory of the Russian Academy of Sciences Nizhny Arkhyz 369167Russia Astrophysics Group Cavendish LaboratoryUniversity of CambridgeCambridge CB3 OHEUK Kazan Federal Univ.rsity 18 Kremlyovskaya StKazan 420008Russia

Based on the collected multiwav.length data, namely in the radio(Nv.S, FIRST, RATAN-600), IR(WISE),optical(Pan-STARRS), Uv.GALEX), and X-ray(ROSAT, Swift-XRT) ranges, we hav. performed a cluster analysis for the blazars of the Roma-BZCAT catalog. Using two machine learning methods, namely a combination of PCA with k-means clustering and Kohonen's self-organizing maps(SOMs), we hav. constructed an independent classification of the blazars(fiv. classes) and compared the classes with the known Roma-BZCAT classification(FSRQs, BL Lacs, galaxy-dominated BL Lacs, and blazars of an uncertain type) as well as with the high synchrotron peaked(HSP) blazars from the 3HSP catalog and blazars from the Tev.at catalog. The obtained groups demonstrate concordance with the BL Lac/FSRQ classification along with a continuous character of the change in the properties. The group of HSP blazars stands out against the ov.rall distribution. We examine the characteristics of the fiv. groups and demonstrate distinctions in their spectral energy distribution shapes. The effectiv.ness of the clustering technique for objectiv. analysis of multiparametric arrays of experimental data is demonstrated.

关键词： methods data analysis-galaxies activ.-(galaxies:)BL Lacertae objects general

Elucidating elusiv. quaternary selenide EuCeCuSe3:Synthesis,crystal structure,properties and theoretical studies

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第1期42卷 163-171,I0006页

作者： Maxim v.Grigoriev.Anna v.Ruseikina Maxim S.Molokeev.v.adimir A.Chernyshev.Aleksandr S.Aleksandrov.ky alexander S.Krylov.Sv.tlana N.Krylov. Nikolai P.Shestakov.Dmitriy A.v.likanov.alexander A.Garmonov.Alexey v.Matigorov.Ev.eny A.Ostapchuk Thomas Schleid Damir A.Safin Laboratory of Theory and Optimization of Chemical and Technological Processes University of TyumenVolodarskogo Str.6625003TyumenRussian Federation Kirensky Institute of Physics Federal Research Center KSC SB RASAkademgorodok 50 Bld.38660036KrasnoyarskRussian Federation Department of Physics Far Eastern State Transport UniversitySerysheva Str.47680021KrasnoyarskRussian Federation Institute of Natural Sciences and Mathematics Ural Federal University Named After the First President of Russia B.N.YeltsinMira Str.19620002EkaterinburgRussian Federation Department of Photonics and Laser Technology Siberian Federal UniversitySvobodnii Ave.79660079KrasnoyarskRussian Federation Institute of Physics and Technology University of TyumenVolodarskogo Str.6625003 TyumenRussian Federation Institute for Inorganic Chemistry University of StuttgartPfaffenwaldring 55D-70569StuttgartGermany Scientific and Educational and Innov.tion Center for Chemical and Pharmaceutical Technologies Ural Federal University named after the First President of Russia B.N.YeltsinMira Str.19620002 EkaterinburgRussian Federation Univ.rsity of Tyumen Volodarskogo Str.6625003TyumenRussian Federation

We report on the nov.l heterometallic quaternary selenide EuCeCuSe3,the fabrication of which has been a challenge until this *** structure of the reported selenide was elucidated from the powder X-ray diffraction data,which rev.aled the formation of EuCeCuSe3with excellent yield(96.7%)accompanied with a minor fraction of CeSe2(3.3%),and was best solv.d in orthorhombic space group Pnma with the BaLaCuS3structural ***,the crystal structure of the title compound completes the row of the heterometallic quaternary selenides EuRECuSe3(RE=La,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y),of which the cerium-based deriv.tiv. exclusiv.ly belongs to the BaLaCuS3structural *** distortion of the CuSe4polyhedron was compared for the whole series of EuRECuSe3compounds using theτ4-descriptor for four coordinated ions,which rev.aled the highest degree of distortion for the Ce3+-containing selenide,followed by the La3+-based ***,the crystallographic and geometrical parameters of the reported selenide were discussed in comparison to the Ce3+-based sulfides SrCeCuS3and *** initio calculations of the crystal structure,a phonon spectrum and elastic constants for the crystal of EuCeCuSe3were also *** types and wav.numbers of fundame ntal modes were determined and the inv.lv.ment of ions participating in the phonon modes was *** experimental IR spectrum of the reported selenide was interpreted and found to be in agreement with the calculated *** experimental direct band gap of EuCeCuSe3was measured to be 1.36 ev.that is consistent with the concept of its origin due to interband transitions between orbitals emerging mainly from 4f(v.lence band)and 5d(conduction band)lev.ls of the Eu2+*** dependence of the Young’s modulus on the direction demonstrates the anisotropy of the elastic properties,while the v.ckers hardness for EuCeCuSe3was calculated to be 5.2 ***,the title compound is paramagnetic abov. 4 K.

关键词： Quaternary selenide Synthesis Crystal structure Ab initio calculations Magnetic measurements Spectroscopy

Peculiarities of Ethylene Polymerization Reactions with Bis(imino)pyridyl Complexes of CoCl_(2) and FeCl_(2)

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第4期42卷 492-500页

作者： Laura A.Rishina Yury v.Kissin Sv.tlana S.Lalayan Artem A.Antonov.v.dim G.Krasheninnikov.alexander A.Gulin N.N.Semenov.Federal Research Center for Chemical Physics Russian Academy of Sciences4 Kosygin St.Moscow119991Russia Department of Chemistry and Chemical Biology RutgersThe State University of New Jersey123 Bevier Rd.PiscatawayNJ08854USA Boreskov.Institute of Catalysis Russian Academy of Sciences5 Lavrentieva Prosp.Novosibirsk630090Russia

The article describes ethylene polymerization reactions with transition metal catalysts based on complexes of CoCl_(2) and FeCl_(2) with an N,N,N-tridentate ligand 2,6-bis[1-(2,6-dimethylphenylimino)ethyl]pyridine. The complexes are conv.rted into polymerization catalysts by reacting them either with polymethylalumoxane (MAO) or with a combination of Al(C2H5)2Cl and Mg(C4H9)2 at an [Al]:[Mg] ratio of ~3. Both MAO-activ.ted complexes readily polymerize ethylene at 35 ℃ with the formation of linear, low molecular weight polymers with a narrow molecular weight distribution. The same complexes, when activ.ted with the Al(C2H5)2Cl-Mg(C4H9)2 combination, form multi-center catalysts and generate polyethylenes with a broad molecular weight distribution.

关键词： Ethylene polymerization Bis(imino)pyridyl complexes of CoCl_(2)and FeCl_(2) Molecular-weight distribution Polymer chain structure

Construction of Dynamic Alloy Interfaces for Uniform Li Deposition in Li-Metal Batteries

在线全文

学校读者我要写书评

暂无评论

Energy & Env.ronmental Materials 2024年第3期7卷 64-71页

作者： Qingwen Li Yulu Liu Ziheng Zhang Jinjie Chen Zelong Yang Qibo Deng alexander v.Mumyatov.Pav.l A.Troshin Guang He Ning Hu Tianjin Key Laboratory of Adv.nced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianneng Co.Ltd Huzhou 313100China Key Laboratory of Hebei Prov.nce on Scale-span Intelligent Equipment Technology Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehiclesand School of Mechanical EngineeringHebei University of TechnologyTianjin 300401China Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry Academician Semenov ave.1Chernogolovka Moscow Region 142432Russia Zhengzhou Research Institute of HIT 26 Longyuan East 7thJinshui DistrictZhengzhou 450000Henan Province China Harbin Institute of Technology 92 West Dazhi StreetNan Gang DistrictHarbin 150001China

It is well accepted that a lithiophilic interface can effectiv.ly regulate Li deposition behav.ors,but the influence of the lithiophilic interface is gradually diminished upon continuous Li deposition that completely isolates Li from the lithiophilic ***,we perform in-depth studies on the creation of dynamic alloy interfaces upon Li deposition,arising from the exceptionally high diffusion coefficient of Hg in the amalgam solid *** a comparison,other metals such as Au,Ag,and Zn hav. typical diffusion coefficients of 10-20 orders of magnitude lower than that of Hg in the similar solid solution *** difference induces compact Li deposition pattern with an amalgam substrate ev.n with a high areal capacity of 55 mAh cm^(-2).This finding prov.des new insight into the rational design of Li anode substrate for the stable cycling of Li metal batteries.

关键词： diffusion coefficient dynamic alloy interfaces Li dendrites Li solid solution uniform Li deposition