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Effect of Non-Muffin-Tin Potential on Electronic Structure of NiO

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Chinese Physics Letters 1998年第11期15卷 828-830页

作者： QIAN Mei-cun HU Wen-ying zheng qing-qi Institute of Solid State Physics Chinese Academy of SciencesHefei 230031 Hefei Institute for Advanced Study University of Science and Technology of ChinaHefei 230026

The electronic structure of NiO has been calculated within the self-consistent local spin density approximation(LSDA)as well as with on-site Coulomb interaction(LSDA+U)*** NiO as a typical ionic crystal,the linear muffin-tin orbitals with the ionic sphere approximation method is *** effect of non-spherical crystalline field is taken into account *** obtained energy-dispersion bands are in agreement with the recent angle-resolved-photoemission spectra.

关键词： spectra. method. approximation

Construction and genetic analysis of mutator insertion mutant population in maize

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Chinese Science Bulletin 2006年第21期51卷 2604-2610页

作者： LIU Wenting GAO Youjun TENG Feng SHI qing zheng Yonglian National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University Wuhan 430070 China

A total of 26718 M1 plants were ob- tained by crossing the active mutator transposon donor parents (Q105, WW51, 115F, V26-2 and 919J) with the recipient parents (Hz85,W328 with Bz gene and S-Mo17Rf3Rf3). The phenotypes of M1 plants were observed in the field. M1 plants were self-pollinated to develop the mutator insertion-mutagenized M2 seeds. The transposition frequency of the mutator in the genome was calculated based on the spotted aleurone phenotype of the M2 seeds. The results showed that: (1) the mutation frequency of M1 phe- notypes in the field was 0.07 in the population of W328×Mu; (2) the mutation frequency of spotted aleurone seeds on the M2 ears was 0.122 in the population of W328×Mu; (3) five S-cytoplasm male-sterile plants were found among 22500 M1 plants of S-Mo17Rf3Rf3×Mu, with the transposition frequency about 2.2×10?4 per locus. 99 flanking se- quences of mutator transposition were amplified by the modified MuTAIL-PCR, and 59 non-redundant sequences with length around 400 bp were obtained. After bioinformatic analysis, 27 sequences of them could be annotated, using non-redundant nucleotide database of maize, rice, and Arabidopsis. 36 se- quences of them were located on the genetic map of maize by comparative genomics, and several flank- ing sequences of mutator insertion were mapped on the single marker locus. Hotspot sequences of mu- tator transposition were revealed by comparing the homologies between the 9-bp target site duplication of the mutator insertion. The putative functions of 8 flanking sequences of mutator transposition had identity with the functions of their correspondingmarker. The constructed mutator insertion mutant population in maize will facilitate the new gene discovery and functional genomics study in maize.

关键词：玉米突变基因转位子突变体种群 MuTAIL-PCR

Effects of HIPing Pressure on Microstructures and Properties of TiAl Alloy

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Journal of Central South University 2000年第3期12卷 140-142页

作者： CHEN Jian-xun HUANG Bai-yun ZHOU Ke-chao zheng qing State Key Laboratory for Powder Metallurgy Central South UniversityChangsha 410083China

Blended elemental Ti 34%Al powders (mass fraction), containing 1.5%TiC, were hot isostatic pressed to prepare TiAl alloys. The effects of HIPing pressure on the sintered density, microstructure, constitutions phase were studied in details. The results show that the density of TiAl alloy increases repaidly with the increase of the HIPing pressure. At the same time, with the increase of pressure, the Ti 3Al phase in matrix disappears. TiC reacts with other substance, forming Ti 2AlC phase, which precipitates at grain boundaries. With the increase of hot isostatic pressing(HIPing) pressure, the shrinkage of the alloys increases, the fine spherical Ti 2AlC phase can meet together and forms a needle shape Ti 2AlC, and the amount of needle shaped Ti 2AlC phase increases. The composite material of TiAl containing C can be made easily by HIPing technology.

关键词： TiAl alloy hot isostatic pressing pressure microstructure carbide

Mucosal lesions of the upper gastrointestinal tract in patients with ulcerative colitis:A review

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World Journal of Gastroenterology 2021年第22期27卷 2963-2978页

作者： Yan Sun Zhe Zhang Chang-qing zheng Li-Xuan Sang Department of Gastroenterology Shengjing Hospital of China Medical UniversityShenyang 110022Liaoning ProvinceChina

Ulcerative colitis(UC)is a chronic,nonspecific,relapsing inflammatory bowel *** colorectum is considered the chief target organ of UC,whereas upper gastrointestinal(UGI)tract manifestations are ***,emerging evidence has suggested that UC presents complications in esophageal,stomachic,and duodenal mucosal ***,UC-related UGI tract manifestations are varied and frequently silenced or ***,the endoscopic and microscopic characteristics of UGI tract complicated with UC are ***,UGI involvement may be ignored by many *** addition,no standard criteria have been established for patients with UC who should undergo ***,specific treatment recommendations may be needed for patients with UC-associated UGI ***,we review the esophageal,gastric,and duodenal mucosal lesions of the UC-associated UGI tract,as well as the potential pathogenesis and therapy.

关键词： Ulcerative colitis Upper gastrointestinal tract Inflammatory bowel disease Endoscopic and microscopic manifestations

H_(2)O_(2) sulfenylates CHE to activate systemic salicylic acid synthesis and ignite systemic acquired resistance

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Molecular Plant 2024年第12期17卷 1794-1796页

作者： Kaihuai Li Cheng Li Daowen Wang Fengquan Liu zheng qing Fu Department of Plant Pathology College of AgricultureGuizhou UniversityGuiyang 550025China State Key Laboratory of Wheat and Maize Crop Science College of Agronomy and Center for Crop Genome EngineeringHenan Agricultural UniversityLongzi Lake CampusZhengzhou 450046China Department of Biological Sciences University of South CarolinaColumbiaSC 29208USA

Reactive oxygen species(ROS),generated within plant cells during metabolic processes or in the plant apoplast when triggered by external microorganisms,comprise a group of unstable molecules that include superoxide anions,hydrogen peroxide(H_(2)O_(2)),hydroxyl radicals,and singlet oxygen and are highly reactive with other substances(Waszczak et al.,2018).In the realm of plant biology,H_(2)O_(2) stands out as a vital ROS,instrumental in overseeing numerous developmental processes and stress responses.

关键词： synthesis singlet unstable

Meta-analysis of the effectiveness and safety of vedolizumab for ulcerative colitis

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World Journal of Gastroenterology 2015年第20期21卷 6352-6360页

作者： Yu Jin Yan Lin Lian-Jie Lin Chang-qing zheng Department of Gastroenterology Shengjing Hospital of China Medical University

AIM: To conduct a meta-analysis examining the effectiveness and safety of vedolizumab for the treatment of ulcerative colitis(UC).METHODS: A search was conducted of MEDLINE, Cochrane, EMBASE, and Google Scholar on July 31, 2013. Inclusion criteria were:(1) Randomized controlled trial(RCT);(2) Patients treated for UC; and(3) Intervention was vedolizumab. The following information/data were extracted from studies that met the inclusion criteria: the name of the first author, year of publication, study design, patient demographic information, response rate, remission rate, and adverse events. The primary outcome was clinical response rate, and the secondary outcomes were clinical remission rate and serious adverse events. Odds ratio(OR) with 95%CI were calculated for each outcome. RESULTS: Of 224 studies initially identified, three RCTs examining the use of vedolizumab meeting the inclusion criteria were included in the meta-analysis. All studies examined the use of vedolizumab at dosages ranging from 0.5 to 10 mg/kg body weight(one study used a standard dose of 300 mg). The follow-up periods were approximately 6 wk. The total number of patients in the intervention groups was 901, and in the control groups was 221. The mean age of the patients was approximately 41 years, and approximately half were males. The follow-up periods ranged from 43 d to 6 wk. The clinical response and remission rates were significantly higher for patients who received vedolizumab as compared to control patients(clinical response: OR = 2.69; 95%CI: 1.94-3.74, P < 0.001 and remission rate: OR = 2.72; 95%CI: 1.76-4.19, P < 0.001). Serious adverse events were not higher in patients that received ***: This analysis supports the use of vedolizumab for the treatment of UC.

关键词： Inflammatory bowel disease Ulcerativecolitis Vedolizumab MLN-002 Meta-analysis

Molecular Dynamic Studies on Langmuir Monolayers of Stearic Acid

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Chemical Research in Chinese Universities 2013年第3期29卷 545-550页

作者： KONG Chui-peng ZHANG Hong-xing ZHAO Zeng-xia zheng qing-chuan State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry Jilin University Changchun 130021 P. R. China

Compression isotherm for stearic acid was obtained by means of molecular dynamic simulation and compared to experimentally measured values for the Langmuir monolayers. Compared to the previous simulation, the present simulation has provided a method to reproduce the compression of the monolayer. The result is consistent with other experimental results. By analyzing the alkyl tails, the configuration of stearic acid molecules during the compression process was studied and a uniform monolayer was obtained after compression. Stearic acid molecules were observed to form fine organized monolayer from completely random structure. Hexatic order of the arrangement has been identified for the distribution of stearic acid molecules in the monolayer. At the end of the compression, the stearic acid molecules were tightly packed in the gap of two other molecules. At last, the hydrogen bonds in the system were analyzed. The main hydrogen bonds were from stearic acid-water interaction and their intensities constantly decreased with the decreased of surface area per molecule. The weak hydrogen bond interaction between stearic acid molecules may be the reason of easy collapse.

关键词： Stearic acid Monolayer Molecular dynamics

An Update of the Catalog of Radial Velocity Standard Stars from the APOGEE DR17

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Research in Astronomy and Astrophysics 2023年第11期23卷 243-251页

作者： qing-zheng Li Yang Huang Xiao-Bo Dong Jian-Jun Chen A-Li Luo Yunnan Observatories Chinese Academy of SciencesKunmingYunnan 650011China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China CSA Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China

We present an updated catalog of 46,753 radial velocity(RV)standard stars selected from the APOGEE *** stars cover the Northern and Southern Hemispheres almost evenly,with 62%being red giants and 38%being main sequence *** RV standard stars are stable on a baseline longer than 200 days(with 54%longer than one year and 10%longer than five years)with a median stability better than 215 m s~(-1).The average number of observations of those stars is 5 and each observation is required to have signal-to-noise ratio greater than50 and RV measurement error smaller than 500 m s~(-1).Based on the new APOGEE RV standard star catalog,we have checked the RV zero-points(RVZPs)for current large-scale stellar spectroscopic surveys including RAVE,LAMOST,GALAH and *** careful analysis,we estimate their mean RVZP to be+0.149 kms~(-1),+4.574 km s~(-1)(for LRS),-0.031 km s~(-1)and+0.014 kms~(-1),respectively,for the four *** the RAVE,LAMOST(for MRS),GALAH and Gaia surveys,RVZP exhibits a systematic trend with stellar parameters(mainly[Fe/H],T_(eff),log g,G_(BP)-G_(RP)and G_(RVS)).The corrections to those small but clear RVZPs are of vital importance for these massive spectroscopic surveys in various studies that require extremely high RV accuracies.

关键词： stars:fundamental parameters (stars:)binaries:general stars:general catalogs

Theoretical Studies on Structural and Spectroscopic Properties of Photoelectrochemical Cell Ruthenium Sensitizers―the Derivatives of N3

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Chemical Research in Chinese Universities 2012年第4期28卷 696-702页

作者： CHEN Jie WANG Jian BAI Fu-quan zheng qing-chuan ZHANG Hong-xing State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical ChemistryJilin UniversityChangchun 130021P.R.China

A series of dye molecules was designed ***,azoles and their derivatives were chosen as the modifying groups linking to ancillary ligands of [Ru（dcbpyH2）2（NCS）2]（N3,dcbpy=4,4＇-dicarboxy2,2＇-bipyridine;NCS=thiocyanato）.Density functional theory（DFT） based approaches were applied to exploring the electronic structures and properties of all these *** dye molecule with 1,2,4-triazole groups which exhibits a very high intensity of absorption in visible region,was ***-dependent DFT（TD-DFT） results indicate that the ancillary ligand dominates the molecular orbital（MO） energy levels and masters the absorption transition nature to a certain *** deprotonation of anchoring ligand not only affects the frontier MO energy levels but also controls the energy gaps of the highest occupied MO（HOMO） to the lowest unoccupied MO（LUMO） and LUMO to LUMO＋1 *** the gap between LUMO-LUMO＋1 is small enough,the higher efficiency of dye-sensitized solar cell（DSSC） should be expected.

关键词： Dye-sensitized solar cell Density functional theory(DFT) Frontier molecular orbital Absorption spectrum Deprotonation