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1265篇 您的检索式:作者名="Peng E"
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1A complete sequence and comparative analysis of a SARS-associated virus(Isolate BJ01)显示文摘The genome sequence of the Severe Acute Respiratory Syndrome (SARS)-associated virus provides essential information for the identification of pathogen(s), exploration of etiology and evolution, interpretation of transmission and pathogenesis, development of diagnostics, prevention by future vaccination, and treatment by developing new drugs. We report the complete genome sequence and comparative analysis of an isolate (BJ01) of the coronavirus that has been recognized as a pathogen for SARS. The genome is 29725 nt in size and has 11 ORFs (Open Reading Frames). It is composed of a stable region encoding an RNA-dependent RNA polymerase (composed of 2 ORFs) and a variable region representing 4 CDSs (coding sequences) for viral structural genes (the S, E, M, N proteins) and 5 PUPs (putative uncharacterized proteins). Its gene order is identical to that of other known coronaviruses. The sequence alignment with all known RNA viruses places this virus as a member in the family of Coronaviridae. Thirty putative substitutions have been identified by comparative analysis of the 5 SARS- associated virus genome sequences in GenBank. Fifteen of them lead to possible amino acid changes (non-synonymous mutations) in the proteins. Three amino acid changes, with predicted alteration of physical and chemical features, have been detected in the S protein that is postulated to beinvolved in the immunoreactions between the virus and its host. Two amino acid changes have been detected in the Mprotein, which could be related to viral envelope formation. Phylogenetic analysis suggests the possibility of non-human origin of the SARS-associated viruses but provides noevidence that they are man-made. Further efforts should focus on identifying the etiology of the SARS-associated virus and ruling out conclusively the existence of otherpossible SARS-related pathogen(s).QIN E'de ZHU Qingyu YU Man FAN Baochang CHANG Guohui SI Bingyin YANG Bao PENG Wenming JIANG Tao LIU Bohua DENG Yongqiang LIU Hong ZHANG Yu WANG Cui LI Yuquan GAN Yonghua LI Xiaoyu L Fushuang TAN Gang CAO Wuchun, YANG Ruifu Institute of Microbiology and Epidemiology, Chinese Academy of Military Medical Sciences, Beijing 100071, China WANG Jian, LI Wei, XU Zuyuan, LI Yan, WU Qingfa, LIN Wei, CHEN Weijun, TANG Lin, DENG Yajun, HAN Yujun, LI Changfeng, LEI Meng, LI Guoqing, LI Wenjie, L Hong, SHI Jianping, TONG Zongzhong, ZHANG Feng, LI Songgang, LIU Bin, LIU Siqi, DONG Wei, WANG Jun, Gane K-S Wong, YU Jun & YANG Huanming* Beijing Genomics Institute, Chinese Academy of Sciences, Beijing 101300 National Center for Genome Information, Beijing 101300, China 2003Chinese Science Bulletin2003,48,10:121
2Expression of calreticulin is associated with infiltration of T-cells in stage ⅢB colon cancer显示文摘AIM: To investigate the correlation between expression of calreticulin and infiltration of lymphocytes in stage ⅢB colon cancer. METHODS: Sixty-eight pathologically-confirmed speci-mens were obtained from stage ⅢB (T3N1M0) colon cancer patients who underwent radical resection between January 1999 and May 2002 at the Cancer Center of Sun Yat-Sen University, Guangzhou, China. Immuno-histochemical analysis was performed to show infiltration of lymphocytes and expression of calreticulin in colon cancer. Association between calreticulin expression, infiltration of lymphocytes, and 5-year survival rate of patients was assessed. RESULTS: The expression level of calreticulin was lower in cancer nest than in its adjacent normal epithelium since 61.8% (42/68) of the samples were stained with calreticulin in colon cancer. The expression of calreticulin in colon cancer was associated with the infi ltration of CD45RO+ cells rather than with that of CD3+ cells. In addition, the stronger expression of calreticulin and the higher infiltration of CD3+ and CD45RO+ cells in colon cancer were associated with the higher 5-year survival rate of patients. CONCLUSION: Expression of calreticulin is associated with infiltration of T-cells, which implies that a low expression level of molecular marker may represent a new mechanism underlying immune escape in colon cancer.Rui-Qing Peng, Ya Ding, Xing Zhang, Yi-Xin Zeng, Xiao- Shi Zhang, State Key Laboratory of Oncology in South China, Biotherapy Center, Cancer Center, Sun Yat-Sen University, 651 Dongfeng R E, Guangzhou 510060, Guangdong Province, China Ying-Bo Chen, Zhi-Wei Zhou, State Key Laboratory of Oncology in South China, Department of Gastric and Pancreatic Oncology, Cancer Center, Sun Yat-Sen University, 651 Dongfeng R E, Guangzhou 510060, Guangdong Province, China Rong Zhang, State Key Laboratory of Oncology in South China, Department of Endoscopy, Cancer Center, Sun Yat-Sen University, 651 Dongfeng R E, Guangzhou 510060, Guangdong Province, China Xing-Juan Yu, Yi-Xin Zeng, State Key Laboratory of Oncology in South China, Department of Experimental Research, Cancer Center, Sun Yat-Sen University, 651 Dongfeng R E, Guangzhou 510060, Guangdong Province, China 2010World Journal of Gastroenterology2010,16,19:16
3Pupillary response in patients receiving intrathecal sufentanil显示文摘Pupillary constriction occurs with intravenousadministration of opioids such as sufentanil.However,few studies have investigated the pupillaryeffects of intrathecal(IT)sufentanil.It has previouslybeen demonstrated that the cephalad spread within thecerebrospinal fluid of IT sufentanil results in sideeffects.There are two principal findings of the presentstudy:(1)spinal sufentanil combined with low-dose ofbupivacaine in patients with lower abdominal or lowerextremity procedures induces a dose-dependent pupillaryconstriction that is far more sensitive than othercentrally-mediated side effects;(2)the pupillary effect ofIT sufentanil correlates closely with the adequacy ofspinal anesthesia.WANG Yi-chun GUO Qu-lian WANG E ZHONG Tao HUANG Chang-sheng PENG Jing 2007Chinese Medical Journal2007,,14:14
4Effect of controlled low central venous pressure on renal function in major liver resection显示文摘Objective: To investigate the effects of low central venous pressure (LVCP) on blood loss and evaluate its influ- ence on renal function in patients undergoing hepatectomy. Methods: Forty-six patients, ASA classification I–III, undergoing liver resection were randomized into LCVP group (n = 23) and control group (n = 23). In LCVP group, CVP was maintained at 2–4 mmHg and MBP above 60 mmHg during hepatectomy, while in control group hepatectomy was performed routinely without lowering CVP. Volume of blood loss during hepatectomy, volume of blood transfusion, and changes of renal functions were compared between the two groups. Results: There were no significant differences in demographics, ASA score, type of hepatectomy, duration of inflow occlusion, operation time, weight of resected liver tissues, and renal functions between the two groups. LCVP group had a significantly lower volume of total intraoperative blood loss (P < 0.01) and RBC transfusion (P < 0.05). Conclusion: Lowering the CVP to less than 5 mmHg is a simple and effective technique to reduce blood loss and blood infusion during liver resection, and has no detrimental effects on renal functions.Yuyong Liu Mingxue Cai Shan'e Duan Xuemei Peng Yong Lai Yalan Li 2008The Chinese-German Journal of Clinical Oncology2008,7,1:5
5Characterization and target identification of a DNA aptamer that labels pluripotent stem cells显示文摘Zhonggang Hou Susanne Meyer Nicholas E Propson jeff Nie Peng Jiang Ron Stewart James A Thomson 2015Cell Research2015,25,3:5
6Evaluation of a scientific CMOS camera for astronomical observations显示文摘We evaluate the performance of the first generation scientific CMOS (sC-MOS) camera used for astronomical observations. The sCMOS camera was attached to a 25 cm telescope at Xinglong Observatory, in order to estimate its photometric capabilities. We further compared the capabilities of the sCMOS camera with that of full-frame and electron multiplying CCD cameras in laboratory tests and observations. The results indicate the sCMOS camera is capable of performing photometry of bright sources, especially when high spatial resolution or temporal resolution is desired.Peng Qiu Yong-Na Mao Xiao-Meng Lu E Xiang Xiao-Jun Jiang 2013Research in Astronomy and Astrophysics2013,13,5:4
7Parkin deficiency accentuates chronic alcohol intake-induced tissue injury and autophagy defects in brain,liver and skeletal muscle显示文摘Alcoholism leads to organ injury including mitochondrial defect and apoptosis with evidence favoring a role for autophagy dysregulation in alcoholic damage.Parkin represents an autosomal recessive in herited gene for Parkins on's disease and an important member of selective autophagy for mitoch on dria.The associati on between Parkins on's disease and alcoholic injury remains elusive.This study aimed to examine the effect of parki n deficiency on chr onic alcohol in takeinduced organ injury in brain,liver and skeletal muscle(rectus femoris muscle).Adult parkinknockout(PRK-/-)and wild-type mice were placed on Liber-De Carli alcohol liquid diet(4%)for 12 weeks prior to assessment of liver enzymes,intraperitoneal glucose toleranee,protein carbonyl content apoptosis,hematoxylin and eosin morphological staining,and mitochondrial respiration(cytochrome c oxidase,NADH:cytochrome c reductase and succinate:cytochrome c reductase).Autophagy protein markers were monitored by western blot analysis.Our data revealed that chronic alcohol intake imposed liver injury as evidenced by elevated aspartate aminotransferase and alanine transaminase,glucose intoleranee,elevated protein carbonyl formation,apoptosis,focal inflammation,necrosis,microvesiculation,autophagy/mitophagy failure and dampened mitochondrial respiration(complexⅣ,complexesⅠandⅢ,and complexesⅡandⅢ)in the brain,liver and rectus femoris skeletal muscle.Although parkin ablation itself did not generate any notable effects on liver enzymes,insulin sensitivity,tissue carbonyl damage,apoptosis,tissue morphology,autophagy or mitochondrial respiration,it accentuated alcohol intake-induced tissue damage,apoptosis,morphological change,autophagy/mitophagy failure and mitochondrial injury without affecting insulin sensitivity.These data suggest that parkin plays an integral role in the preservation against alcohol-induced organ injury,apoptosis and mitochondrial damage.Hu Peng Xing Qin Sainan Chen Asli E Ceylan Maolong Dong Zhaofen Lin Jun Ren 2020Acta Biochimica et Biophysica Sinica2020,52,6:3
8Simulating global soil-CO_2 flux and its response to climate change显示文摘It has been argued that increased soil respiration would become a major atmospheric source of CO\-2 in the event of global warming. The simple statistical models were developed based on a georeferenced database with 0 5°×0 5° longitude/latitude resolution to simulate global soil\|CO\-2 fluxes, to investigate climatic effects on these fluxes using sensitivity experiments, and to assess possible responses of soil\|CO\-2 fluxes to various climate change scenarios. The statistical models yield a value of 69 PgC/a of global soil\|CO\-2 fluxes for current condition. Sensitivity experiments confirm that the fluxes are responsive to changes in temperature, precipitation and actual evapotranspiration, but increases in temperature and actual evapotranspiration affect soil\|CO 2 fluxes more than increases in precipitation. Using climatic change projections from four global circulation models, each corresponding to an equilibrium doubling of CO 2, it can be found that the largest increases in soil\|CO 2 fluxes were associated with the boreal and tundra regions. The globally averaged soil\|CO 2 fluxes were estimated to increase by about 35% above current values, providing a positive feedback to the greenhouse effect.PENG Chang\|hui 1* , Michael J. Apps\+2 (1 Ontario Forest Research Institute, Ministry of Natural Resources, 1235 Queen Street East, Sault Ste. Marie, ON P6A 2E5,Canada. E\|mail: pengc@gov.on.ca 2 Morthern Forestry Center, Canadian Forest Serv 2000Journal of Environmental Sciences2000,12,3:2
9Oral delivery of capsaicin using MPEG-PC nanoparticles显示文摘Aim: To prepare a biodegradable polymeric carrier for oral delivery of a water-insoluble drug capsaicin (CAP) and evaluate its quality. Methods: CAP-loaded methoxy poly (ethylene glycol)-poly(c-caprolactone) nanoparticles (CAP/NPs) were prepared using a modified emulsification solvent diffusion technique. The quality of CAP/NPs were evaluated using transmission electron microscopy, powder X-ray diffraction, differential scanning calorimetry and Fourier transform infrared techniques. A dialysis method was used to analyze the in vitro release profile of CAP from the CAP/NPs. Adult male rats were orally administered CAP/NPs (35 mg/kg); and the plasma concentrations of CAP were measured with a validated HPLC method. The morphology of rat gastric mucosa was studied with HE staining. Results: CAP/NPs had an average diameter of 82.54±0.51 nm, high drug-loading capacity of 14.0%±0.13% and high stability. CAP/NPs showed a biphasic release profile in vitro: the burst release was less than 25% of the loaded drug within 12 h followed by a more sustained release for 60 h. The pharmacokinetics study showed that the mean maximum plasma concentration was observed 4 h after oral administered of CAP/NPs, and approximately 90 ng/mL of CAP was detected in serum after 36 h. The area under the curve for the CAP/NPs group was approximately 6-fold higher than that for raw CAP suspension. Histological studies showed that CAP/NPs markedly reduced CAP-caused gastric mucosa irritation. Conclusion: CAP/NPs significantly enhance the bioavailability of CAP and markedly reduce gastric mucosa irritation in rats.Wei PENG Xin-yi JIANG Yuan ZHU E Omari-Siaw Wen-wen DENG Jiang-nan YU Xi-ming XU Wei-ming ZHANG 2015Acta Pharmacologica Sinica2015,36,1:2
10Low-temperature sintering and microwave dielectric properties of Ca(Li1/3 Nb2/3)O3-δ ceramics显示文摘Liu Peng Kim E S Yoon K H 2001Jpn Journal Application Physics2001,40,:2
11Microwave dielectric properties of low temperature sintering Ca O3-δ 显示文摘Liu Peng Ogawa H Kim E S 2004Journal of European Ceramic Society2004,24,:2
12A preliminary study of level 1A data processing of a low-low satellite to satellite tracking mission显示文摘With the Gravity Recovery and Climate Experiment(GRACE)mission as the prime example,an overview is given on the management and processing of Level 1A data of a low-low satellite to satellite tracking mission.To illustrate the underlying principle and algorithm,a detailed study is made on the K-band ranging(KBR)assembly,which includes the measurement principles,modeling of noises,the generation of Level 1A data from that of Level0 as well as Level 1A to Level 1B data processing.Xu Peng Qiang Li'e Bian Xing Dong Peng Ju Peng Gao Wei Gong Xuefei Luo Ziren Shao Mingxue Tang Werilin Wan Xiaoyun Lau Yun-Kau 2015Geodesy and Geodynamics2015,6,5:2
13Thermally induced structural transformation of polytriazoleimide to polyindoleimide显示文摘包含 bisphenyl-1,2,3-triazole (BPT ) 的 polytriazoleimide 的一种新类型被叠氮化物和炔属羟和 polycondensation (CuAAC ) 的催化铜的 1,3-dipolar cycloaddition 综合。polytriazoleimide 的热稳定性和降级机制被调查。结果证明在 polytriazoleimide 的 BPT 的结构在热处理以后转变到 phenylindole,伴随 N2 的版本。Yan Peng E Li Qiang Wan Yu Jing Li Fa Rong Huang Lei Du 2012Chinese Chemical Letters2012,23,9:2
14White spot syndrome baculovirus(WSBV) detected in cultured and captured shrimp, crabs and other arthropods 显示文摘Lo C F Ho C H Peng S E 1996Dis Aquat Org1996,27,:1
15CFD Simulation of Fine Coal Segregation and Stratification in Jigs 显示文摘Xia Y k Peng F F Wolfe E 2007Mineral Process2007,82,3:1
16A novel coordination polymer with double chains structure: hydrothermal syntheses, structures and magnetic properties of ECu(phen) ( H2O)2 SO4]n ( phenl, 10-phenanthroline)显示文摘Xu L Wang E B Peng J Huang R D 2003Inorganic Chemistry Communications2003,,6:1
17Molecular analysis of cellulose biosynthesis in Arabidopsis显示文摘ARIOLI T PENG L BETZNER A S BURN J WITTKE W HERTH W CAMILLERI C H(O)FTE H PLAZINSKI J BIRCH R CORKA GLOVER J REDMOND J WILLIAMSDN R E 1998Science1998,279,:1
18hybrids and 4-1BB costimulation Mouse dendritic-endothelial cell elicit antitumor effects mediated by broad antiangiogenic immunity 显示文摘Ko E Luo W Peng L 2007Cancer Res2007,67,16:1
19'Green revolution' genes encode mutant gibberellin response modulators显示文摘Peng J R Donald E R Nigel M H 1999Nature1999,400,:1
20Guaranteed cost control of linear systems overs networks with state and input quantisations 显示文摘YUE D PENG C TIAN E G 2006IEE Proceedings: Control Theory and Applications2006,153,6:1
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