检索结果-南通市图书馆

Theoretical study on the reaction mechanism of (CH3)3CO(.) radical with NO

在线全文

学校读者我要写书评

暂无评论

Science china {1. 2004年第4期47卷 289-294页

作者： zhao hongmei1,2. liU Kun1, {2. & li zonghe1 1. department of chemistry, beijing normal university, beijing 100875, china 2. department of chemistry, Beihua university, Jilin 132.13, china 1. department of {1. Beijing Normal University 100875 Beijing China 2. {1. of chemistry Beihua University 132013 Jilin China

The reaction mechanism of (CH3)3CO? radical with NO is theoretically investigated at the B3LYP/6-31.* level. The results show that the reaction is multi-channel in the single state and triplet state. The potential energy surfaces of reaction paths in the single state are lower than that in the triple state. The balance reaction: (CH3)3CONO(CH3)3CO?+NO, whose potential energy surface is the lowest in all the reaction paths, makes the probability of measuring (CH3)3CO? radical increase. So NO may be considered as a stabilizing reagent for the (CH3)3CO? radical.

关键词： (CH3)3CO. radical DFT reaction mechanism NO

Theoretical study on the reaction mechanism of(CH_3)_3CO+CO

在线全文

学校读者我要写书评

暂无评论

Science china {1. 2005年第1期48卷 18-24页

作者： zhao hongmei1,2.3, {2.,4, ZHANG Rongchang3, XI Hongmin3 & li zonghe1 1. department of chemistry, beijing normal university, beijing 100875, china 2. The Laboratory of Molecular Reaction Dynamics, Institute of chemistry, Chinese Academy of Sciences, beijing 100080, china 3. department of chemistry, Beihua university, Jilin 132.13, china 4. department of chemistry, Qujing normal university, Yunnan 655000, china 1. department of {1. Beijing Normal University 100875 Beijing China 2. The Laboratory of Molecular Reaction Dynamics Institute of Chemistry Chinese Academy of Sciences 100080 Beijing China 3. department of {1. Beihua University 132013 Jilin China 4. department of {1. Qujing Normal University 655000 Yunnan China

The reaction mechanism of (CH3)3CO with CO has been theoretically investigated using density-functional theory (DFT) calculations at B3LYP/6-31.* level. In order to get more reliable energy values the single-point energy is evaluated at CCSD (T)/6-31.+G** level. The results show that the reaction is multi-channel and the reaction of (CH3)3CO radical with CO mostly produces (CH3)3C + CO{1. The reaction could play a role in eliminating air pollution.

关键词： DFT, B3LYP, (CH3)3CO, radical.

Proton induced X-ray emission (PIXE) analysis of sources of porcelain body of Ru Guan and Jun Guan porcelains

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2006年第4期49卷 411-420页

作者： li Guoxia1, zhao Weijuan1, li Rongwu2. sun Hongwei1, GUO Min1, WANG Yanfang1, liU Hui1, zhao Qingyun3, sun Xinmin3, zhao Wenjun3 & CHENG Huansheng4 1. Faculty of Physical Engineering, Zhengzhou university, Zhengzhou 450052. china 2. department of Physics, beijing normal university, beijing 100875, china 3. Institute of Cultural Relic and Archaeology of Henan Province, Zhengzhou 450000, china 4. Institute of Modern Physics, Fudan university, Shanghai 2.0433, china Faculty of Physical Engineering Zhengzhou University Zhengzhou 450052 China department of Physics Beijing Normal University Beijing 100875 China Institute of Cultural Relic Archaeology of Henan Province Zhengzhou 450000 China Institute of Modern Physics Fudan University Shanghai 200433 China

34 samples of Ru Guan porcelain body and 50 samples of Jun Guan porcelain body (both kinds being in different body colors) were selected with the purpose of finding out the source of raw materials and their classification relationship so as to search for ways of non-destructive discrimination. Proton induced X-ray emission (PIXE) has been applied to these samples to determine their chemical elements. The data of seven major chemical elements collected from these samples were further studied through fuzzy cluster analysis. Results indicate that the origin of raw materials of Jun Guan porcelain body samples is comparatively more concentrated in certain places, while that of Ru Guan porcelain body samples is scattered about. The places of origin of raw materials of the majority of Ru Guan and Jun Guan porcelain body samples have something in common, but some differences still exist. It might be an important way for non-destructive discrimination among Ru Guan and Jun Guan porcelains by combining PIXE with fuzzy cluster analysis.

关键词： Ru Guan and Jun Guan porcelain, source of porcelain body, PIXE, fuzzy cluster analysis, non-destructive discrimination.

Factors affecting land dissection density in geomorphological regions of china

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第4期21卷 1372-1387页

作者： sun Xiao{1.n zhao Yinjun PENG Peihao CHENG Weiming WEI Yongping YANG Ronghao {1. Jiaxu College of Earth Sciences Chengdu University of TechnologyChengdu 610059China School of Civil Engineering Guangxi Polytechnic of ConstructionNanning 530001China Key Laboratory of Environment Change and Resources Use in Beibu Gulf Ministry of EducationNanning Normal UniversityNanning 530001China Key Laboratory of Earth Surface Process and Intelligent Simulation(Guangxi) Nanning Normal UniversityNanning 530001China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China School of Earth and Environmental Sciences The University of QueenslandBrisbane 4702Australia School of Geography and Planning Nanning Normal UniversityNanning 530001China

Land dissection density(LDD)provides morphological evidence regarding prior intense soil erosion and quantifies the distribution of land dissections.A comprehensive understanding of the potential factors influencing the spatial pattern and value of the LDD is vital in geological disasters,soil erosion,and other related *** dissection phenomena in china affects large areas with different morphological,pedological,and c{1.matic *** studies have focused on the potential factors influencing the LDD at a watershed ***,these results are insufficient to reflect the status quo of dissection development and its primary influencing factors on a national ***’s spatial patterns and the dominant factors at a regional scale in mil{1.ons of square kilometers remain to be *** study used the geomorphon-based method and the geographical detector model to quantify the spatial pattern of LDD over china and identify the dominant factors affecting this pattern in china’s six first-order geomorphological regions(GR1.GR6).The results yield the following findings:(1.LDD in china ranges from 0~4.55 km/km^(2.,which is larger in central and eastern regions than in other regions of china;(2.dominant factors and their dominant risk subcategories vary with each geomorphological region’s primary internal and external forces;(3)the influence of natural factors is more significant on the large regional scale in mil{1.ons of square kilometers compared to anthropogenic factors;re{1.ef degree of land surface(RDLS)is dominant in GR1.GR2.and GR5;the slope is dominant in GR6,soil type is dominant in GR3 and GR4,and {1.thology plays a critical role in the dominant interactions of GR3,GR4,and GR6;(4)the interactions between factors on LDD’s spatial pattern have a more significant effect than individual factors.

关键词： Land dissection density Influencing factors Regional scale Spatial pattern Geographical detector model Geomorphon-based method china

Review of current ZT>1.thermoelectric sulfides

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第1期10卷 218-233页

作者： Fu-Hua sun Hezhang {1. Jun Tan {1.ngmei zhao Xinyu Wang Haihua Hu Chao Wang Takao Mori School of Materials Science and Engineering Hubei Normal UniversityHuangshi435002China International Center for Materials Nanoarchitechtonics(WPI-MANA) National Institute for Materials Science(NIMS)Namiki 1-1Tsukuba305-0047Japan department of Precision Instrument Tsinghua UniversityBeijing100084China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Graduate School of Pure and Applied Sciences University of TsukubaTsukuba305-8671Japan Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan528225China

Thermoelectrics has played a fascinating role in the developments of direct energy conversion *** the past decade,sulfur-based thermoelectric materials have been significantly advanced in optimizing electrical and thermal transport due to their similarities in chemical and structural properties with tellurides and *** review provides research progress on metal sulfides,particularly focuses on materials exhibiting high thermoelectric figure of merit(ZT>1.0).It highlights the potential compounds,***-S,Sn-S,Pb-S based,and *** strategies of superionic conducting,band configuration tuning,high-entropy alloying,and anomalous harmonic scattering are try to demonstrate the performance-improved mechanisms for thermoelectric *** addition,some common synthesis recipes are briefly introduced,and thereby making potential candidates as excellent alternatives for producing thermoelectric power generators in the mid *** outcomes along with how to further improve the thermoelectric performance and promote its scale-up applications are also outlined at the end.

关键词： Synthetic technology Figure merit of ZT Sulfides Thermoelectric

Boosting the zinc storage performance of vanadium dioxide by integrated morphology engineering and carbon nanotube conductive networks

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

Nano Research 2024年第8期17卷 7136-7143页

作者： lijie Ma Xiaolin Wang Xiang Chen Jianbin Gao Yiwen Wang Yuehai Song Yaran zhao Shizhe Gao lin li Jianchao sun School of Environment and Material Engineering Yantai UniversityYantai 264005China College of Textile Science and Engineering(International Institute of Silk) Zhejiang Sci-Tech UniversityHangzhou 310018China BNU-HKUST Laboratory of Green Innovation Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Vanadium dioxide(VO_(2.) with the advantages of high theoretical capacity and tunnel structure has attracted considerable promising candidates for aqueous zinc-ion ***,the intrinsic low electronic conductivity of VO_(2. results in an unsatisfactory electrochemical ***,a flower-like VO_(2./carbon nanotubes(CNTs)composite was obtained by a facile hydrothermal *** unique flower-like morphology shortens the ion transport length and facilitates electrolyte ***,the CNT conductive networks is in favor of fast electron transfer.A highly reversible zinc storage mechanism was revealed by ex-situ X-ray diffraction and X-ray photoelectron *** a result,the VO_(2./CNTs cathode exhibits a high reversible capacity(41. mAh·g^(−1.),superior rate performance(305 mAh·g^(−1.at 5 A·g^(−1.),and excellent cycling stability(a reversible capacity of 2.1.mAh·g^(−1.was maintained even after 2.00 cycles).This work provides a guide for the design of high-performance cathode materials for aqueous zinc metal batteries.

关键词： VO_(2./carbon nanotubes morphology engineering zinc metal batteries cathode materials conductive networks

Synthesis and Crystal Structure of Complex: [Co（cdm）2.H2.）4].2.2. （cdm=Carbamyldicyanomethanide Anion）

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 Structural chemistry 2002年第2期 178-181页

作者： SHI Jing-Min②1 YIN Hai-liang1 sun li-Jing1 YU Wen-Tao2.XU Wen1 zhao Ming-Gen3 1({2. of {2., Shandong normal university, Jinan 2.0014, china) 2.Institute of Crystal Matrials, Shandong university, Jinan 2.0010, china) 3({2. of Che department of {1.， Shandong {2. university， Jinan 2.001.， china Institute of Crystal Matrials， Shandong university， Jinan {1.001.， china department of {1.， Xinzhou {2. Institute， Xinzhou 034000， china

Mononuclear complex [Co(cdm)2.H2.)4]?H2. was synthesized by sodium carbamyldicyanomethanide (Nacda) and cobalt perchlorate. The crystal belongs to monoclinic system, space group P2./n with a = 9.366(3), b = 7.392.3), c = 1.0}039(4)? = 1.8.335(4)? V = 791.2.5)?, Z = 2. Mr (C8H1.CoN6O8) = 383.2. Dc = 1.608 g/cm3, F(000) = 394, = 1.1.5 mm-1. = 0.71.73 ? The structure was refined to R = 0.02.0 and wR = 0.0632.for 1.0}7 observed reflections (I > 2.I)). The cobalt(II) atom in the complex is coordinated by two nitrile-nitrogen atoms and four oxygen atoms of H2., which forms a slightly distorted coordination octahedron around the cobalt(II) ion. The mononuclear complexes are connected by hydrogen bondings and in the crystal there exists a cavity where the uncoordinated H2. molecules are trapped.

关键词： synthesis crystal structure cobalt complex

Proteomic analysis of mitochondria reveals a metabolic switch from fatty acid oxidation to glycolysis in the failing heart

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china({1.fe Sciences) 2009年第11期52卷 1003-1010页

作者： WANG Jun1.2. BAI {1.ng1.2. {1. Jing3, sun ChaoFeng1.2. zhao Jin1. CUI ChangCong1.2. HAN Ke1.2. {1.U Yu1.2. ZHUO XiaoZhen1.2. WANG TingZhong1.2. {1.U Ping1.2. FAN Fen{1.ng1.2. GUAN YouFei3 & MA AiQun1.2.1.{2. of Cardiology, First affi{1.ated hospital of medical college of Xi’an Jiaotong {2., Xi’an 71.061.{21. 2.Ion Channel Disease Laboratory, Key Laboratory of Environment and Genes Related to Diseases of Education Ministry, Xi’an 71.061.{21. 3 {2. of Physiology and Pathophysiology Key Laboratory of Molecular Cardiovascular Sciences of the Ministry of Education, Peking {2. Health Science Center, beijing 1.0083,{21. 1. department of Cardiology First affiliated hospital of medical college of Xi’an Jiaotong University Xi’an 710061 China 2. Ion Channel Disease Laboratory Key Laboratory of Environment and Genes Related to Diseases of Education Ministry Xi’an 710061 China 3. department of Physiology and Pathophysiology Key Laboratory of Molecular Cardiovascular Sciences of the Ministry of Education Peking University Health Science Center Beijing 100083 China

This work characterizes the mitochondrial proteomic profile in the failing heart and elucidates the molecular basis of mitochondria in heart failure. Heart failure was induced in rats by myocardial infarction, and mitochondria were isolated from hearts by differential centrifugation. Using two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization-time of flight mass spectrometry, a system biology approach was employed to investigate differences in mitochondrial proteins between normal and failing hearts. Mass spectrometry identified 2. proteins differentially expressed that involved in energy metabolism. Among those, the up-regulated proteins included tricarboxylic acid cycle enzymes and pyruvate dehydrogenase complex subunits while the down-regulated proteins were involved in fatty acid oxidation and the OXPHOS complex. These results suggest a substantial metabolic switch from free fatty acid oxidation to glycolysis in heart failure and provide molecular evidence for alterations in the structural and functional parameters of mitochondria that may contribute to cardiac dysfunction during ischemic injury.

关键词： mitochondria heart failure proteome two-dimensional electrophoresis energy metabolism

Development of a potent benzonitrile-based inhibitor of glutaminyl-peptide cyclotransferase-like protein(QPCTL)with antitumor efficacy

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1期9卷 44-46页

作者： Lei Yu Pengcheng zhao Yao{1.ang sun Zening Zheng Wenhao Du {1.shan Zhang Yaxu {1. Longyan Xie Shi{1.n Xu Ping Wang Tongji university Cancer Center Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghaiChina department of Medicinal {1. Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghaiChina

Dear Editor,Immune checkpoint therapies manipulating the immune system to eliminate tumor cells have shown remarkable clinical efficacy in treating various ***47,an emerging efficient immune checkpoint,is crucial for cancer cells to evade macrophagemediated phagocytosis by interaction with signal-regulatory proteinα(SIRPα).Antibodies blocking the CD47/SIRPαinteraction have been effective to promote macrophage-mediated phagocytosis in various types of cancer in mice and ***47 is not only highly expressed in tumor cells,but also normal cells,such as red blood cells(RBCs).Thus,during clinical trials involving cancer patients,anti-CD47 antibodies may promote the macrophagesmediated phagocytosis of RBCs,ultimately inducing undesirable anemia side *** contrast,small molecule inhibitors interrupting CD47/SIRPαaxis have shown potential to overcome the anemia,possibly due to their lower immunogenicity and shorter half-life compared to antibodies.1.Hence,developing the novel strategies,especially those without the anemia side effect,to intervene in CD47/SIRPαinteraction will benefit cancer immunotherapy.

关键词： anemia overcome eliminate