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| 1 | A 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 | 2003 | Chinese Science Bulletin2003，48，10： | 121 |
| 2 | Intestinal microbiota pathogenesis and fecal microbiota transplantation for inflammatory bowel disease显示文摘The intestinal microbiota plays an important role in inflammatory bowel disease(IBD).The pathogenesis of IBD involves inappropriate ongoing activation of the mucosal immune system driven by abnormal intestinal microbiota in genetically predisposed individuals.However,there are still no definitive microbial pathogens linked to the onset of IBD.The composition and function of the intestinal microbiota and their metabolites are indeed disturbed in IBD patients.The special alterations of gut microbiota associated with IBD remain to be evaluated.The microbial interactions and hostmicrobe immune interactions are still not clarified.Limitations of present probiotic products in IBD are mainly due to modest clinical efficacy,few available strains and no standardized administration.Fecal microbiota transplantation(FMT)may restore intestinal microbial ho-meostasis,and preliminary data have shown the clinical efficacy of FMT on refractory IBD or IBD combined with Clostridium difficile infection.Additionally,synthetic microbiota transplantation with the defined composition of fecal microbiota is also a promising therapeutic approach for IBD.However,FMT-related barriers,including the mechanism of restoring gut microbiota,standardized donor screening,fecal material preparation and administration,and long-term safety should be resolved.The role of intestinal microbiota and FMT in IBD should be further investigated by metagenomic and metatranscriptomic analyses combined with germfree/human flora-associated animals and chemostat gut models. | Zi-Kai Wang Yun-Sheng Yang Ye Chen Jing Yuan Gang Sun Li-Hua Peng | 2014 | World Journal of Gastroenterology2014，20，40： | 30 |
| 3 | The intracellular mechanism of alpha-fetoprotein promoting the proliferation of NIH 3T3 cells显示文摘AIM The existence and properties of alpha-fetoprotein (AFP) receptor on the surface of NIH 3T3 cells and the effects of AFP on cellular signal transduction pathway were investigated. METHODS The effect of AFP on the proliferation of NIH 3T3 cells was measured by incorporation of 3H-TdR. Receptor-binding assay of 125I-AFP was performed to detect the properties of AFP receptor in NIH 3T3 cells. The influences of AFP on the [cAMP]i and the activities of protein kinase A (PKA) were determined. Western blot was used to detect the change of K-ras P21 protein expression. RESULTS The proliferation of NIH 3T3 cells treated with 0-80 mg/L of AFP was significantly enhanced. The Scatchard analysis indicated that there were two classes of binding sites with KD of 2.722×10-9M (Bmax=12810 sites per cell) and 8.931× 10-SM (Bmax=l19700 sites per cell) respectively. In the presence of AFP (20 mg/L), the content of cAMP and activities of PKA were significantly elevated . The level of K-ras P21 protein was upregulated by AFP at the concentration of 20 mg/L. The monoclonal antibody against AFP could reverse the effects of AFP on the cAMP content, PKA activity and the expression of K-ras p21 gene. CONCLUSION The effect of AFP on the cell proliferation was achieved by binding its receptor to trigger the signal transduction pathway of cAMP-PKA and alter the expression of K- ras p21 gene. | MENG SEN LI, PING FENG LI, FBI YI YANG, SHI PENG HE, Guo GUANG DU, GANG LI1 Department of Biochemistry and Molecular Biology, 2 Department of Biophysics, Health Science Center, Peking University, Beijing 100083, China | 2002 | Cell Research2002，12，2： | 27 |
| 4 | Latest Progress of the Chinese Meteorological Satellite Program and Core Data Processing Technologies显示文摘In this paper,the latest progress,major achievements and future plans of Chinese meteorological satellites and the core data processing techniques are discussed.First,the latest three FengYun(FY)meteorological satellites(FY-2H,FY-3D,and FY-4A)and their primary objectives are introduced Second,the core image navigation techniques and accuracies of the FY meteorological satellites are elaborated,including the latest geostationary(FY-2/4)and polar-orbit(FY-3)satellites.Third,the radiometric calibration techniques and accuracies of reflective solar bands,thermal infrared bands,and passive microwave bands for FY meteorological satellites are discussed.It also illustrates the latest progress of real-time calibration with the onboard calibration system and validation with different methods,including the vicarious China radiance calibration site calibration,pseudo invariant calibration site calibration,deep convective clouds calibration,and lunar calibration.Fourth,recent progress of meteorological satellite data assimilation applications and quantitative science produce are summarized at length.The main progress is in meteorological satellite data assimilation by using microwave and hyper-spectral infrared sensors in global and regional numerical weather prediction models.Lastly,the latest progress in radiative transfer,absorption and scattering calculations for satellite remote sensing is summarized,and some important research using a new radiative transfer model are illustrated. | Peng ZHANG Qifeng LU Xiuqing HU Songyan GU Lei YANG Min MIN Lin CHEN Na XU Ling Sun Wenguang BAI Gang MA Di XIAN | 2019 | Advances in Atmospheric Sciences2019，36，9： | 26 |
| 5 | Identification of anti-asthmatic compounds in Pericarpium citri reticulatae and evaluation of their synergistic effects显示文摘 | Qian SHI Ze LIU Yang YANG Peng GENG Yuan-yuan ZHU Qi ZHANG Fang BAI Gang BAI | 2009 | Acta Pharmacologica Sinica2009，30，5： | 23 |
| 6 | Impact of social isolation and resident intruder stress on aggressive behavior in the male rat显示文摘Stress studies frequently utilize physical stressors to establish animal models of stress.In the majority of cases,these models are not consistent with human circumstances.The present study simulated a social isolation plus resident intruder stress model in the rat.The rats were subjected to daily social isolation and resident intruder stress for 2 weeks.Behaviors were then tested.Rats subjected to social stress exhibited different aggressive behavior styles;some rats had greater scores on composite aggression behaviors,as well as locomotor and exploratory activity,but lower scores on latency than others.The high-aggressive group exhibited predominantly anger-out,while the low-aggressive group exhibited anger-in.Results suggest that social isolation plus resident intruder may serve as an appropriate model for anger-in and anger-out emotion modeling in the rat. | Sheng Wei Huiyun Zhang Jie Gao Ling Xue Peng Sun Yubin Chao Gang Xue Mingqi Qiao | 2010 | Neural Regeneration Research2010，5，15： | 23 |
| 7 | Elevated serum alpha fetoprotein levels promote pathological progression of hepatocellular carcinoma显示文摘AIM:To investigate the biological role of alpha fetoprotein (AFP) and its clinical signif icance in carcinogenesis of hepatocellular carcinoma (HCC).METHODS:Clinical analysis of HCC patients and im-munohistochemical examination were conducted to evaluate the relationship between serum AFP level and patient mortality. Confocal microscopy,Western blotting, dimethylthiahzolyl-2,5-diphenyl-tetrazolium bromide,Cell Counting Kit-8 assays and flow cytometry were performed to explore the possible mechanism.RESULTS: Among the 160 HCC patients enrolled in this study,130 patients survived 2 years (81.25%),with a survival rate of 86.8% in AFP < 2 0 μg/L group,88.9% in AFP 20-250 μg/L group,and 69.6% in AFP > 250 μg/L group, demonstrating a higher mortality rate in HCC patients with higher AFP levels. Surgical treatment was benef icial only in patients with low AFP levels.The mortality rate of HCC patients with high AFP levels who were treated surgically was apparently higher than those treated with conservative management.The results of immunohistochemistry showed that AFP and AFP receptor were merely expressed in tissues of HCC patients with positive serum AFP.Consistently,in vitro analysis showed that AFP and AFPS were expressed in HepG2 but not in HLE cells. AFP showed a capability to promote cell growth,and this was more apparent in HepG2 cells,in which the proliferation was increased by 3.5 folds. Cell cycle analysis showed that the percent-age of HepG2 cells in S phase after exposure to AFP was modestly increased.CONCLUSION:HCC patients with higher AFP levels show a higher mortality rate,which appears to be attributable to the growth promoting properties of AFP. | Peng Li Shan-Shan Wang Hui Liu Ning Li Michael A McNutt Gang Li Hui-Guo Ding | 2011 | World Journal of Gastroenterology2011，17，41： | 23 |
| 8 | The China Alzheimer Report 2022显示文摘China’s population has rapidly aged over the recent decades of social and economic development as neurodegenerative disorders have proliferated,especially Alzheimer’s disease(AD)and related dementias(ADRD).AD’s incidence rate,morbidity,and mortality have steadily increased to make it presently the fifth leading cause of death among urban and rural residents in China and magnify the resulting financial burdens on individuals,families and society.The‘Healthy China Action’plan of 2019-2030 promotes the transition from disease treatment to health maintenance for this expanding population with ADRD.This report describes related epidemiological trends,evaluates the economic burden of the disease,outlines current clinical diagnosis and treatment status and delineates existing available public health resources.More specifically,it examines the public health impact of ADRD,including prevalence,mortality,costs,usage of care,and the overall effect on caregivers and society.In addition,this special report presents technical guidance and supports for the prevention and treatment of AD,provides expertise to guide relevant governmental healthcare policy development and suggests an information platform for international exchange and cooperation. | Rujing Ren Jinlei Qi Shaohui Lin Xinya Liu Peng Yin Zhihui Wang Ran Tang Jintao Wang Qiang Huang Jianping Li Xinyi Xie Yongbo Hu Shishuang Cui Yuan Zhu Xiaoping Yu Pengfei Wang Yikang Zhu Yiran Wang Yanyan Huang Yisong Hu Ying Wang Chunbo Li Maigeng Zhou Gang Wang | 2022 | General Psychiatry2022，35，1： | 20 |
| 9 | Preliminary study on a single balloon cross-midline expansion via unipedicular approach in kyphoplasty显示文摘背景最近,有一个单个汽球的双边的 transpedicular kyphoplasty 被执行让脊椎的身体压缩折断的 osteoporotic (OVCF ) 减少操作的操作,而是时间的费用,放射暴露更长。这研究的目的是决定一个单个汽球的安全和有效性跨中线的经由在为 OVCFs.Methods 的 kyphoplasty 的 unipedicular 途径的扩大有痛苦的 OVCF (61 vertebrae ) 的 36 个病人在这研究被注册。单方的 transpedicular 刺在在小花梗下面一个倾斜的角度监视的荧光检查下面被执行。一个单个汽球通过 unipedicular 途径被介绍。最后的汽球位置在有跨中线的扩大和骨头水泥充满了的汽球的脊椎的身体的中线。临床的结果被外科手术前、手术后的视觉类似物规模(管) 和 Oswestry 残疾索引(ODI ) 的比较决定。X 光线照相术的评价包括了脊椎的高度的恢复和驼背的修正。后续被进行 6-12 月(平均数 9.2 月).Results 有 61 vertebrae 的 36 个连续病人成功地每椎骨与 37.4 分钟的一吝啬的手术时间被给动手术。所有病人没有外科或设备相关的复杂并发症在过程以后在 96 个小时以内有戏剧的疼痛地势和功能的恢复。管 20 从 7.27 慲? 改善了 ??????????????????????????????????? 偏吗?? | SUN Gang JIN Peng LI Fan-dong LIU Xun-wei HAO Run-song YI Yu-hai XIE Zhi-yong | 2008 | Chinese Medical Journal2008，，18： | 17 |
| 10 | HPLC Fingerprint - Antioxidant Properties Study of Buckwheat显示文摘For quality control of buckwheat, fingerprint-efficacy study of buckwheat was carried out in this work. 2,2′-Bipyridyl,2,2- diphenyl-1-picrylhydrazyl radical (DPPH) scavenging activity of the buckwheat was measured using UV spectrometer. Chemical fingerprints of tartary buckwheat from 29 different sources were determined by HPLC-UV and investigated by similarity analysis and hierarchical clustering analysis. The fingerprint-efficacy relationship between chemical fingerprint and DPPH radical scavenging activity of tartary buckwheat were established by multi-linear regression analysis. The results showed that the sources of buckwheat had some important influence on the chemical fingerprints and DPPH radical scavenging activity. DPPH radical scavenging activity of tartary buckwheat was stronger than that of common buckwheat, rutin, and kaempferol and some unknown compound might be the major effective components for quality control of tartary buckwheat for its antioxidant activity. | ZHAO Gang PENG Lian-xin WANG Shu HU Yi-bing ZOU Liang | 2012 | Journal of Integrative Agriculture2012，11，7： | 17 |
| 11 | Wheel/rail dynamic interaction due to excitation of rail corrugation in high-speed railway显示文摘Characteristics of wheel-rail dynamic interaction due to the rail corrugation in a high-speed railway are analyzed based on the theory of vehicle-track coupled dynamics in this paper.Influences of the corrugation wavelength and depth on the wheel-rail dynamic performance are investigated.The results show that,under the excitation of a measured rail corrugation,the wheel-rail dynamic interaction of high-speed railway is enhanced obviously,and the high-frequency dynamic force between wheel and rail is generated,which has an obvious impact on the vibrations of the wheelset and rail,and little effect on the vibration of the frame and carbody.If the corrugation wavelength is shorter than the sensitive wavelength,the wheel-rail vertical force will increase with the growth of the corrugation wavelength,otherwise,it will decrease.However,the wheel-rail vertical force keeps increasing with the growth of corrugation depth.Furthermore,if the corrugation wavelength is shorter than the sensitive wavelength,the wheel-rail vertical force will increase with the decrease of the running speed,otherwise,it will decrease.It is also found that the critical wavelength of corrugation increases with the growth of the corrugation depth and the running speed,and the critical depth of corrugation is nonlinearly related to the sensitive wavelength. | WANG Kai Yun LIU Peng Fei ZHAI Wan Ming HUANG Chao CHEN Zai Gang GAO JianMin | 2015 | Science China(Technological Sciences)2015，58，2： | 17 |
| 12 | Interleukin-8, a promising predictor for prognosis of pancreatic cancer显示文摘AIM: To investigate the value of interleukin-8 (IL-8), a pro-inflammatory chemokine, in predicting the prognosis of pancreatic cancer. METHODS: Expression of IL-8 and its receptor CXCR1 was assessed by immunohistochemistry in pancreatic cancer and chronic pancreatitis samples. Enzyme-linked immunosorbent assay was used to detect the serum IL-8 levels in pancreatic cancer patients. Human pancreatic cancer tissues were heterotopically transplanted to the immune-deficiency mice to evaluate the effect of serum IL-8 on the tumorigenesis of the cancer samples.RESULTS: IL-8 and CXCR1 proteins were both overexpressed in pancreatic adenocarcinoma samples (55.6% and 65.4%, respectively) compared with the matched para-cancer tissues (25.9% and 12.3%, P < 0.01), or chronic pancreatitis (0% and 25%, P < 0.05). Serum IL-8 levels in pancreatic cancer patients (271.1 ± 187.7 ng/mL) were higher than in other digestive system tumors, such as gastric cancer (41.77 ± 9.11 ng/mL, P = 0.025), colorectal carcinoma (78.72 ± 80.60 ng/mL, P = 0.032) and hepatocellular carcinoma (59.60 ± 19.80 ng/mL, P = 0.016). In vivo tumorigenesis analysis further proved that tumor tissues from patients with higher serum IL-8 levels grew faster than those with lower IL-8 levels. CONCLUSION: IL-8 can be a fine serum marker for predicting the prognosis pancreatic cancer. | Ying Chen Min Shi Guan-Zhen Yu Xiao-Ran Qin Gang Jin Peng Chen Ming-Hua Zhu | 2012 | World Journal of Gastroenterology2012，18，10： | 16 |
| 13 | Effects of Proton Pump Inhibitors on the Gastrointestinal Microbiota in Gastroesophageal Reflux Disease显示文摘Proton pump inhibitors(PPIs) are commonly used to lessen symptoms in patients with gastroesophageal reflux disease(GERD). However, the effects of PPI therapy on the gastrointestinal microbiota in GERD patients remain unclear. We examined the association between the PPI usage and the microbiota present in gastric mucosal and fecal samples from GERD patients and healthy controls(HCs) using 16 S rRNA gene sequencing. GERD patients taking PPIs were further divided into short-term and long-term PPI user groups. We showed that PPI administration lowered the relative bacterial diversity of the gastric microbiota in GERD patients. Compared to the non-PPIuser and HC groups, higher abundances of Planococcaceae, Oxalobacteraceae, and Sphingomonadaceae were found in the gastric microbiota from the PPI-user group. In addition, the Methylophilus genus was more highly abundant in the long-term PPI user group than in the short-term PPI-user group. Despite the absence of differences in alpha diversity, there were significant differences in the fecal bacterial composition of between GERD patients taking PPIs and those not taking PPIs. There was a higher abundance of Streptococcaceae, Veillonellaceae, Acidaminococcaceae,Micrococcaceae, and Flavobacteriaceae present in the fecal microbiota from the PPI-user group than those from the non-PPI-user and HC groups. Additionally, a significantly higher abundance of Ruminococcus was found in GERD patients on long-term PPI medication than that on shortterm PPI medication. Our study indicates that PPI administration in patients with GERD has a significant effect on the abundance and structure of the gastric mucosal microbiota but only on the composition of the fecal microbiota. | Yi-Chao Shi Shun-Tian Cai Ya-Ping Tian Hui-Jun Zhao Yan-Bing Zhang Jing Chen Rong-Rong Ren Xi Luo Li-Hua Peng Gang Sun Yun-Sheng Yang | 2019 | Genomics, Proteomics & Bioinformatics2019，17，1： | 16 |
| 14 | Effects of warming and clipping on plant and soil properties of an alpine meadow in the Qinghai-Tibetan Plateau, China显示文摘Climate warming and livestock grazing are known to have great influences on alpine ecosystems like those of the Qinghai-Tibetan Plateau(QTP) in China. However, it is lacking of studies on the effects of warming and grazing on plant and soil properties in these alpine ecosystems. In this study, we reported the related research from manipulative experiment in 2010–2012 in the QTP. The aim of this study was to investigate the individual and combined effects of warming and clipping on plant and soil properties in the alpine meadow ecosystem. Infrared radiators were used to simulate climate warming starting in July 2010, while clipping was performed once in October 2011 to simulate the local livestock grazing. The experiment was designed as a randomized block consisting of five replications and four treatments: control(CK), warming(W), clipping(C) and warming+clipping combination(WC). The plant and soil properties were investigated in the growing season of the alpine meadow in 2012. The results showed that W and WC treatments significantly decreased relative humidity at 20-cm height above ground as well as significantly increases air temperature at the same height, surface temperature, and soil temperature at the depth of 0–30 cm. However, the C treatment did not significantly decrease soil moisture and soil temperature at the depth of 0–60 cm. Relative to CK, vegetation height and species number increased significantly in W and WC treatment, respectively, while vegetation aboveground biomass decreased significantly in C treatment in the early growing season. However, vegetation cover, species diversity, belowground biomass and soil properties at the depth of 0–30 cm did not differ significantly in W, C and WC treatments. Soil moisture increased at the depth of 40–100 cm in W and WC treatments, while belowground biomass, soil activated carbon, organic carbon and total nitrogen increased in the 30–50 cm soil layer in W, C and WC treatments. Although the initial responses of plant and soil properties to experimental warming and clipping were slow and weak, the drought induced by the downward shift of soil moisture in the upper soil layers may induce plant belowground biomass to transfer to the deeper soil layers. This movement would modify the distributions of soil activated carbon, organic carbon and total nitrogen. However, long-term data collection is needed to further explain this interesting phenomenon. | Man Hou XU Fei PENG Quan Gang YOU Jian GUO Xia Fei TIAN Min LIU Xian XUE | 2015 | Journal of Arid Land2015，7，2： | 14 |
| 15 | Choice of approach for hepatectomy for hepatocellular carcinoma located in the caudate lobe:Isolated or combined lobectomy?显示文摘AIM:To investigate the significance of the surgical approaches in the prognosis of hepatocellular carcinoma(HCC) located in the caudate lobe with a multivariate regression analysis using a Cox proportional hazard model.METHODS:Thirty-six patients with HCC underwent caudate lobectomy at a single tertiary referral center between January 1995 and June 2010.In this series,left-sided,right-sided and bilateral approaches were used.The outcomes of patients who underwent isolated caudate lobectomy or caudate lobectomy combined with an additional partial hepatectomy were compared.The survival curves of the isolated and combined resection groups were generated by the Kaplan-Meier method and compared by a log-rank test.RESULTS:Sixteen(44.4%) of 36 patients underwent isolated total or partial caudate lobectomy whereas 20(55.6%) received a total or partial caudate lobectomy combined with an additional partial hepatectomy.The median diameter of the tumor was 6.7 cm(range,2.1-15.8 cm).Patients who underwent an isolated caudate lobectomy had significantly longer operative time(240 min vs 170 min),longer length of hospital stay(18 d vs 13 d) and more blood loss(780 mL vs 270 mL) than patients who underwent a combined caudate lobectomy(P < 0.05).There were no perioperative deaths in both groups of patients.The complication rate was higher in the patients who underwent an isolated caudate lobectomy than in those who underwent combined caudate lobectomy(31.3% vs 10.0%,P < 0.05).The 1-,3-and 5-year disease-free survival rates for the isolated caudate lobectomy and the combined caudate lobectomy groups were 54.5%,6.5% and 0% and 85.8%,37.6% and 0%,respectively(P < 0.05).The corresponding overall survival rates were 73.8%,18.5% and 0% and 93.1%,43.6% and 6.7%(P < 0.05).CONCLUSION:The caudate lobectomy combined with an additional partial hepatectomy is preferred because this approach is technically less demanding and offers an adequate surgical margin. | Peng Liu Bao-An Qiu Gang Bai Hong-Wei Bai Nian-Xin Xia Ying-Xiang Yang Jian-Yong Zhu Yang An Bing Hu | 2012 | World Journal of Gastroenterology2012，18，29： | 13 |
| 16 | Drag models for simulating gas–solid flow in the turbulent fluidization of FCC particles显示文摘This paper examines the suitability of various drag models for predicting the hydrodynamics of the turbulent fluidization of FCC particles on the Fluent V6.2 platform.The drag models included those of Syamlal–O’Brien,Gidaspow,modified Syamlal–O’Brien,and McKeen.Comparison between experimental data and simulated results showed that the Syamlal–O’Brien,Gidaspow,and modified Syamlal–O’Brien drag models highly overestimated gas–solid momentum exchange and could not predict the formation of dense phase in the fluidized bed,while the McKeen drag model could not capture the dilute charac- teristics due to underestimation of drag force.The standard Gidaspow drag model was then modified by adopting the effective particle cluster diameter to account for particle clusters,which was,however, proved inapplicable for FCC particle turbulent fluidization.A four-zone drag model(dense phase,subdense phase,sub-dilute phase and dilute phase)was finally proposed to calculate the gas–solid exchange coefficient in the turbulent fluidization of FCC particles,and was validated by satisfactory agreement between prediction and experiment. | Peng Li Xingying Lan Chunming Xu Gang Wang Chunxi Lu Jinsen Gao | 2009 | Particuology2009，7，4： | 13 |
| 17 | A vicinal effect for promoting catalysis of Pd1/TiO2:supports of atomically dispersed catalysts play more roles than simply serving as ligands显示文摘Atomically dispersing metal atoms on supports has been emerging as an effective strategy to maximize the atom utilization of metals for catalysis. However, due to the lack of effective tools to characterize the detailed structure of metal-support interface, the chemical functions of supports in atomically dispersed metal catalysts are hardly elucidated at the molecular level. In this work, an atomically dispersed Pd_1/TiO_2 catalyst with Ti(Ⅲ) vicinal to Pd is prepared and used to demonstrate the direct involvement of metal atoms on support in the catalysis of dispersed metal atoms. Systematic studies reveal that the Ti(Ⅲ)-O-Pd interface facilitates the activation of O_2 into superoxide(O_2^-), thus promoting the catalytic oxidation. The catalyst exhibits the highest CO turn-over frequency among ever-reported Pd-based catalysts,and enhanced catalysis in the combustion of harmful volatile organic compound(i.e., toluene) and greenhouse gas(i.e., methane). The demonstrated direct involvement of metal atoms on oxide support suggests that the real active sites of atomically dispersed metal catalysts can be far beyond isolated metal atoms themselves. Metal atoms on oxide supports in the vicinity serve as another vector to promote the catalysis of atomically dispersed metal catalysts. | Pengxin Liu Yun Zhao Ruixuan Qin Lin Gu Peng Zhang Gang Fu Nanfeng Zheng | 2018 | Science Bulletin2018，63，11： | 13 |
| 18 | Optimum design of hierarchical stiffened shells for low imperfection sensitivity显示文摘A concept of hierarchical stiffened shell is proposed in this study,aiming at reducing the imperfection sensitivity without adding additional weight.Hierarchical stiffened shell is composed of major stiffeners and minor stiffeners,and the minor stiffeners are generally distributed between adjacent major stiffeners.For various types of geometric imperfections,e.g.,eigenmode-shape imperfections,hierarchical stiffened shell shows significantly low imperfection sensitivity compared to traditional stiffened shell.Furthermore,a surrogate-based optimization framework is proposed to search for the hierarchical optimum design.Then,two optimum designs based on two different optimization objectives(including the critical buckling load and the weighted sum of collapse loads of geometrically imperfect shells with small-and large-amplitude imperfections)are compared and discussed in detail.The illustrative example demonstrates the inherent superiority of hierarchical stiffened shells in resisting imperfections and the effectiveness of the proposed framework.Moreover,the decrease of imperfection sensitivity can finally be converted into a decrease of structural weight,which is particularly important in the development of large-diameter launch vehicles. | Bo Wang Peng Hao Gang Li Jia-Xin Zhang Kai-Fan Du Kuo Tian Xiao-Jun Wang Xiao-Han Tang | 2014 | Acta Mechanica Sinica2014，30，3： | 12 |
| 19 | Human mesenchymal stromal cells enhance the immunomodulatory function of CD8+CD28- regulatory T cells显示文摘 | Qiuli Liu Haiqing Zheng Xiaoyong Chen Yanwen Peng Weijun Huang Xiaobo Li Gang Li Wenjie Xia Qiquan Sun an Andy Peng Xiang | 2015 | Cellular & Molecular Immunology2015，12，6： | 12 |
| 20 | Chinese physicians' perceptions of fecal microbiota transplantation显示文摘AIM: To explore Chinese physicians' perceptions towards fecal microbiota transplantation(FMT) and to provide information and an assessment of FMT development in China.METHODS: A self-administered questionnaire was developed according to the FMT practice guidelines and was distributed to physicians in hospitals via Internet Research Electronic Data Capture(REDcap) software and electronic mails to assess their attitudes toward and knowledge of FMT. The questionnaire included a brief introduction of FMT that was followed by 20 questions. The participants were required to respond voluntarily, under the condition of anonymity and without compensation. Except for the fill-in-the-blank questions, all of the other questions were required in the REDcap data collection systems, and the emailed questionnaires were completed based on eligibility.RESULTS: Up to December 9, 2014, 844 eligible questionnaires were received out of the 980 distributed questionnaires, with a response rate of 86.1%. Among the participants, 87.3% were from tertiary hospitals, and there were 647(76.7%) gastroenterologists and 197(23.3%) physicians in other departments(nongastroenterologists). Gastroenterologists' awareness of FMT prior to the survey was much higher than non-gastroenterologists'(54.3 vs 16.5%, P < 0.001); however, acceptance of FMT was not statistically different(92.4 vs 87.1%, P = 0.1603). Major concerns of FMT included the following: acceptability to patients(79.2%), absence of guidelines(56.9%), and administration and ethics(46.5%). On the basis of understanding, the FMT indications preferred byphysicians were recurrent Clostridium difficile infection(86.7%), inflammatory bowel disease combined with Clostridium difficile infection(78.6%), refractory ulcerative colitis(70.9%), ulcerative colitis(65.4%), Crohn's disease(59.4%), chronic constipation(43.7%), irritable bowel syndrome(39.1%), obesity(28.1%) and type 2 diabetes(23.9%). For donor selection, the majority of physicians preferred individuals with a similar gut flora environment to the recipients. 76.6% of physicians chose lower gastrointestinal tract as the administration approach. 69.2% of physicians considered FMT a safe treatment. CONCLUSION: Chinese physicians have awareness and a high acceptance of FMT, especially gastroenterologists, which provides the grounds and conditions for the development of this novel treatment in China. Physicians' greatest concerns were patient acceptability and absence of guidelines. | Rong-Rong Ren Gang Sun Yun-Sheng Yang Li-Hua Peng Shu-Fang Wang Xiao-Hong Shi Jing-Quan Zhao Yong-Ling Ban Fei Pan Xue-Hong Wang Wei Lu Jian-Lin Ren Ying Song Jiang-Bin Wang Qi-Ming Lu Wen-Yuan Bai Xiao-Ping Wu Zi-Kai Wang Xiao-Mei Zhang Ye Chen | 2016 | World Journal of Gastroenterology2016，22，19： | 12 |
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