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1281篇 您的检索式:作者名="ZHENG Yong"
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1Functional exhaustion of antiviral lymphocytes in COVID-19 patients显示文摘In December 2019,a novel coronavirus was first reported in Wuhan,China.1 It was named by the World Health Organization as severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and is responsible for coronavirus disease 2019(COVID-19).Up to 28 February 2020,79,394 cases have been confirmed according to China’s National Health Commission.Outside China,the virus has spread rapidly to over 36 countries and territories.Yuanhong Xuand Zhigang Tian Meijuan Zheng Yong Gao Gang Wang Guobin Song Siyu Liu Dandan Sun Yuanhong Xu Zhigang Tian 2020Cellular & Molecular Immunology2020,17,5:54
2Stress changes on major faults caused by M_w7.9 Wenchuan earthquake,May 12,2008显示文摘On May 12,2008,a magnitude 7.9 earthquake ruptured the Longmenshan fault system in Sichuan Province,China,collapsing buildings and killing tens of thousands people.As predicted,aftershocks may last for at least one year,and moreover,large aftershocks are likely to occur.Therefore,it is critical to outline the areas with potential aftershocks before reconstruction and resettling people as to avoid future disasters.It is demonstrated that the redistribution of stress induced by an earthquake should trigger successive seismic activity.Based on static stress triggering theory,we calculated the coseismic stress changes on major faults induced by the Wenchuan earthquake,with elastic dislocation the-ory and the multilayered crustal model.We also discuss the stress distribution and its significance for future seismic activity under the impact of the Wenchuan earthquake.It is shown that coulomb failure stress(CFS) increases obviously on the Daofu-Kangding segment of the Xianshuihe Fault,the Maqu and Nanping segment of the Eastern Kunlun Fault,the Qingchuan Fault,southern segment of the Min-jiang Fault,Pengxian-Guanxian Fault,Jiangyou-Guangyuan Fault,and Jiangyou-Guanxian Fault.The increased stress raises the probability of earthquake occurrence on these faults.Since these areas are highly populated,earthquake monitoring and early disaster alarm system are needed.CFS increases with a magnitude of 0.03―0.06 MPa on the Qingchuan Fault,which is close to the northern end of the rapture of Wenchuan earthquake.The occurrence of some strong aftershocks,including three events with magnitude higher than 5.0,indicates that the seismic activities have been triggered by the main shock.Aftershocks seem to migrate northwards.Since the CFS change on the Lueyang-Mianxian Fault located on the NEE of the Qingchuan Fault is rather small(±0.01 MPa),the migration of aftershocks might be terminated in the area near Hanzhong City.The CFS change on the western Qinling Fault is around 10 Pa,and the impact of static triggering can be neglected.The increment of CFS on the Pengxian-Guanxian Fault and Beichuan-Yingxiu Fault southwest to the main rupture is 0.005―0.015 MPa,which would facilitate earthquake triggering in these areas.Very few aftershocks in these areas indicate that the accumulated stress has not been released sufficiently.High seismic risk is predicated in these areas due to coseismic CFS loading.The Wenchuan earthquake released the accumulated CFS on the Fubianhe Fault,the Huya Fault,the Ha'nan-Qingshanwan Fault,and the Diebu-Bailongjiang Fault.The decrement of CFS changes on the Longquanshan Fault east to Chengdu City is about 0.002 MPa.The seismic activity will be depressed by decrement of CFS on these faults.SHAN Bin XIONG Xiong ZHENG Yong DIAO FaQi 2009Science China Earth Sciences2009,52,5:47
3Crustal structure of the northeastern Tibetan plateau,the Ordos block and the Sichuan basin from ambient noise tomography显示文摘We apply ambient noise tomography to significant seismic data resources in a region including the northeastern Tibetan plateau,the Ordos block and the Sichuan basin.The seismic data come from about 160 stations of the provincial broadband digital seismograph networks of China.Ambient noise cross-correlations are performed on the data recorded between 2007 and 2009 and high quality inter-station Rayleigh phase velocity dispersion curves are obtained between periods of 6 s to 35 s.Resulting Rayleigh wave phase velocity maps possess a lateral resolution between 100 km and 200 km.The phase velocities at short periods (<20 s) are lower in the Sichuan basin,the northwest segment of the Ordos block and the Weihe graben,and outline sedimentary deposits.At intermediate and long periods (>25 s),strong high velocity anomalies are observed within the Ordos block and the Sichuan basin and low phase velocities are imaged in the northeastern Tibetan plateau,reflecting the variation of crustal thickness from the Tibetan plateau to the neighboring regions in the east.Crustal and uppermost mantle shear wave velocities vary strongly between the Tibetan plateau,the Sichuan basin and the Ordos block.The Ordos block and the Sichuan basin are dominated by high shear wave velocities in the crust and uppermost mantle.There is a triangle-shaped low velocity zone located in the northeastern Tibetan plateau,whose width narrows towards the eastern margin of the plateau.No low velocity zone is apparent beneath the Qinling orogen,suggesting that mass may not be able to flow eastward through the boundary between the Ordos block and the Sichuan basin in the crust and uppermost mantle.Yong Zheng Yingjie Yang Michael H. Ritzwoller Xiufen Zheng Xiong Xiong Zuning Li 2010Earthquake Science2010,23,5:43
4Stress changes on major faults caused by 2013 Lushan earthquake and its relationship with 2008 Wenchuan earthquake显示文摘On April 20, 2013, an Ms7.0 earthquake occurred in Ya'an-Lushan region, Sichuan Province, China, killing and injuring morethan one thousand people. Therefore, it is critical to outline the areas with potential aftershocks before reconstruction andre-settlement as to avoid future disasters. Based on the elastic dislocation theory and multi-layered lithospheric model, we calculate the co-and post-seismic stress changes caused by the Wenchuan and Lushan earthquakes to discuss the relationshipbetween Mw7.9 Wenchuan earthquake and Ms7.0 Lushan earthquake, the influences on the distribution of aftershock caused bythe Lushan earthquake, and the stress changes on major faults in this region. It is shown that the Coulomb failure stress increment on the hypocenter of Lushan earthquake caused by the Wenchuan earthquake is about 0.0037-0.0113 MPa. And the possible maximum value (0.0113 MPa) is larger than the threshold of stress triggering. Therefore, the occurrence of Lushanearthquake is probably effectively promoted by the Wenchuan earthquake. The aftershock distribution is well explained by theco-seismic stress changes of Lushan earthquake. By the two ends of the rupture of Lushan earthquake with increased Coulombfailure stress, a lack of aftershock recordings indicates the high seismic hazard. The stress accumulation and correspondingseismic hazard on the Kangding-Dafu segment of the Xinshuihe fault, the Beichuan-Yingxiu fault, the Pengxian-Guanxianfault, and the Ya'an fault are further increased by the Lushan earthquake and post-seismic process of Wenchuan earthquake.SHAN Bin XIONG Xiong ZHENG Yong JIN BiKai LIU ChengLi XIE ZhuJun HSU HouTze 2013Science China Earth Sciences2013,56,7:49
5Straw return and appropriate tillage method improve grain yield and nitrogen efficiency of winter wheat显示文摘Straw return is an important management tool for tackling and promoting soil nutrient conservation and improving crop yield in Huang-Huai-Hai Plain, China. Although the incorporation of maize straw with deep plowing and rotary tillage practices are widespread in the region, only few studies have focused on rotation tillage. To determine the effects of maize straw return on the nitrogen(N) efficiency and grain yield of winter wheat(Triticum aestivum L.), we conducted experiments in this region for 3 years. Five treatments were tested:(i) rotary tillage without straw return(RT);(ii) deep plowing tillage without straw return(DT);(iii) rotary tillage with total straw return(RS);(iv) deep plowing tillage with total straw return(DS);(v) rotary tillage of 2 years and deep plowing tillage in the 3rd year with total straw return(TS). Treatments with straw return increased kernels no. ear^(–1), thousand-kernel weight(TKW), grain yields, ratio of dry matter accumulation post-anthesis, and nitrogen(N) efficiency whereas reduced the ears no. ha^(–1) in the 2011–2012 and 2012–2013 growing seasons. Compared with the rotary tillage, deep plowing tillage significantly increased the grain yield, yield components, total dry matter accumulation, and N efficiency in 2013–2014. RS had significantly higher straw N distribution, soil inorganic nitrogen content, and soil enzymes activities in the 0–10 cm soil layer compared with the DS and TS. However, significantly lower values were observed in the 10–20 and 20–30 cm soil layers. TS obtained approximately equal grain yield as DS, and it also reduced the resource costs. Therefore, we conclude that TS is the most economical method for increasing grain yield and N efficiency of winter wheat in Huang-Huai-Hai Plain.CHEN Jin ZHENG Meng-jing PANG Dang-wei YIN Yan-ping HAN Ming-ming LI Yan-xia LUO Yong-li XU Xu LI Yong WANG Zhen-lin 2017Journal of Integrative Agriculture2017,16,8:42
6Where Does AlphaGo Go: From Church-Turing Thesis to AlphaGo Thesis and Beyond显示文摘An investigation on the impact and significance of the Alpha Go vs. Lee Sedol Go match is conducted, and concludes with a conjecture of the Alpha Go Thesis and its extension in accordance with the Church-Turing Thesis in the history of computing. It is postulated that the architecture and method utilized by the Alpha Go program provide an engineering solution for tackling issues in complexity and intelligence. Specifically,the Alpha Go Thesis implies that any effective procedure for hard decision problems such as NP-hard can be implemented with Alpha Go-like approach. Deep rule-based networks are proposed in attempt to establish an understandable structure for deep neural networks in deep learning. The success of Alpha Go and corresponding thesis ensure the technical soundness of the parallel intelligence approach for intelligent control and management of complex systems and knowledge automation.Fei-Yue Wang Jun Jason Zhang Xinhu Zheng Xiao Wang Yong Yuan Xiaoxiao Dai Jie Zhang Liuqing Yang 2016IEEE/CAA Journal of Automatica Sinica2016,3,2:44
7Crustal and upper mantle structure and the deep seismogenic environment in the source regions of the Lushan earthquake and the Wenchuan earthquake显示文摘Following the M w 7.9 Wenchuan earthquake, the M w 6.6 Lushan earthquake is another devastating earthquake that struck the Longmenshan Fault Zone (LFZ) and caused severe damages. In this study, we collected continuous broadband ambient noise seismic data and earthquake event data from Chinese provincial digital seismic network, and then utilized ambient noise tomography method and receiver function method to obtain high resolution shear wave velocity structure, crustal thickness, and Poisson ratio in the earthquake source region and its surroundings. Based on the tomography images and the receiver function results, we further analyzed the deep seismogenic environment of the LFZ and its neighborhood. We reveal three main findings: (1) There is big contrast of the shear wave velocities across the LFZ. (2) Both the Lushan earthquake and the Wenchuan earthquake occurred in the regions where crustal shear wave velocity and crustal thickness change dramatically. The rupture faults and the aftershock zones are also concentrated in the areas where the lateral gradients of crustal seismic wave speed and crustal thickness change significantly, and the focal depths of the earthquakes are concentrated in the transitional depths where shear wave velocities change dramatically from laterally uniform to laterally non-uniform. (3) The Wenchuan earthquake and its aftershocks occurred in low Poisson ratio region, while the Lushan earthquake sequences are located in high Poisson ratio zone. We proposed that the effect of the dramatic lateral variation of shear wave velocity, and the gravity potential energy differences caused by the big contrast in the topography and the crustal thickness across the LFZ may constitute the seismogenic environment for the strong earthquakes in the LFZ, and the Poisson ratio difference between the rocks in the south and north segments of the Longmenshan Fault zone may explain the 5 years delay of the occurrence of the Lushan earthquake than the Wenchuan earthquake.ZHENG Yong GE Can XIE ZuJun YANG YingJie XIONG Xiong HSU HouTze 2013Science China Earth Sciences2013,56,7:37
8Source parameters inversion of the 2013 Lushan earthquake by combining teleseismic waveforms and local seismograms显示文摘On April 20, 2013, a magnitude M s 7.0 earthquake occurred in Lushan, Sichuan Province, China, and caused heavy casualties and economic losses. Based on the local broadband waveforms in Sichuan and adjacent provinces regional networks and teleseismic broadband records from IRIS stations, the focal mechanism and the focal depth are determined by the CAP (Cut And Paste) and its upgraded methods, CAPtele and CAPjoint, respectively. The results show that the focal mechanisms and depth from different methods are steady, and the best double couple solution derived from the joint inversion is 210°, 44°, and 91° for strike, dip, and rake angles respectively for one nodal plane and 29°, 46°, and 89° for another with 16 km focal depth and M w 6.66 moment magnitude. In order to verify the reliability of the results, a number of tests are performed based on local seismograms with different velocity models. They indicate that there is about 10 degree's fluctuation in focal mechanisms and about 2 km variation in focal depth with a complex velocity structure. Furthermore, inverted by re-sampling the teleseismic waveforms on the basis of epicentral distance, the solutions are consistent with each other, which manifests that the teleseismic records are effective for constraining source parameters of the Lushan earthquake.XIE ZuJun JIN BiKai ZHENG Yong GE Can XIONG Xiong XIONG Cheng HSU HouTze 2013Science China Earth Sciences2013,56,7:35
9Rapid and Efficient Gene Modification in Rice and Brachypodium Using TALENs显示文摘Qiwei Shan Yanpeng Wang Kunling Chen Zhen Liang Jun Li Yi Zhang Kang Zhang Jinxing Liu Daniel F. Voytas Xuelian Zheng Yong Zhang Caixia Gao 2013Molecular Plant2013,6,4:37
10The Phenotypic Characterization of Naturally Occurring Regulatory CD4^+CD25^+T Cells显示文摘免疫系统的动态平衡取决于在对自我抗原的对入侵的病原体和有免疫力的忍耐的有免疫力的反应之间的平衡。中央、外部的忍耐是为 T 房间忍耐的正式就职和维护的重要机制。最近,许多注意对规章的 T 房间(Treg ) 被给予了,它在维持外部有免疫力的忍耐起一个重要作用。到目前为止,关于 Treg 房间的表面标记没有令人满意的进展,因为任何一个都不为 Treg 房间是唯一的。在这评论,我们总结在自然地发生的CD4+CD25+ Treg 房间( nTreg )表示的一些重要分子,包括 forkhead/winged-helix 家庭 transcriptional 抑压者 p3 ( Foxp3 ),肿瘤坏死因素受体( TNFR )家庭, CD28/CTLA4 分子, chemokine 受体,像使用费的受体( TLR ), membranebound TGF-和其它分子例如 neuropilin-1 ,淋巴细胞激活 gene-3 (落后) -3 和 granzyme.This 评论在 nTregHuanfa Yi Yu Zhen Lingling Jiang Jialin Zheng Yong Zhao 2006Cellular & Molecular Immunology2006,3,3:31
11Stenting for symptomatic intracranial arterial stenosis in China:1-year outcome of a multicentre registry study显示文摘background and purpose A multicentre prospective registry study of individually tailored stenting for a patient with symptomatic intracranial atherosclerotic stenosis(ICAS)combined with poor collaterals in China showed that the short-term safety and efficacy of stenting was acceptable.However,it remained uncertain whether the low event rate could be of a long term.We reported the 1-year outcome of this registry study to evaluate the long-term efficacy of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Methods Patients with symptomatic ICAS caused by 70%-99% stenosis located at the intracranial internal carotid,middle cerebral,intracranial vertebral or basilar arteries combined with poor collaterals were enrolled.Balloon-mounted stent or balloon plus self-expanding stent were selected based on the ease of vascular access and lesion morphology determined by the operators.The primary outcome was the rate of 30-day stroke,transient ischaemic attack and death,and 12-month ischaemic stroke within the same vascular territory,haemorrhagic stroke and vascular death after stenting.results From September 2013 to January 2015,300 patients(ages 58.3±9.78 years)were recruited.Among them,159 patients were treated with balloon-mounted stent and 141 with balloon plus self-expanding stent.During the 1-year follow-up,25 patients had a primary end point event.The probability of primary outcome at 1 year was 8.1%(95% CI 5.3% to 11.7%).In 76 patients with digital subtraction angiography follow-up,27.6%(21/76)had re-stenosis≥50% and 18.4%(14/76)had re-stenosis≥70%.No baseline characteristic was associated with the primary outcome.Conclusion The event rate remains low over 1 year of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Further randomised trial of comparing individually tailored stenting with best medical therapy is needed.Ning Ma Yong Zhang Jie Shuai Changchun Jiang Qiyi Zhu Kangning Chen Li Liu Baomin Li Xiangqun Shi Lianbo Gao Yajie Liu Feng Wang Yongli Li Tieyan Liu Hongbo Zheng Dapeng Mo Feng Gao Yilong Wang Yongjun Wang Lei Feng Zhongrong Miao 2018Stroke & Vascular Neurology2018,3,3:29
12Orbit determination of Chang'E-3 and positioning of the lander and the rover显示文摘Chang’E-3 landed on the east of Sinus Iridum area on December 14,2013,performing China’s first successful soft landing on the lunar surface.We present the results on precision orbit determination and positioning of the lander and the rover.We describe the data,modeling,and methods used to achieve position knowledge over the period December 2–21,2014.In addition to the radiometric X-band range and Doppler tracking data,delta differential one-way ranging data are also used in the calculation,which show that they strongly improve the accuracy of the orbit reconstruction.Total position overlap differences are about 20 and 30 m for the 100 km 9 100 km and100 km9 15 km lunar orbit,respectively,increased by*50%with respect to CE-2 and at the same level as other lunar spacecrafts of recent era such as SELENE and lunar reconnaissance orbiter(LRO).The position error of the soft landing trajectory is less than 100 m.A kinematic statistical method is applied to determine the position of the lander and relative position of the rover with respect to the lander.The position difference of the lander is better than50 m compared to LRO photograph result.Compared with the delta very long baseline interferometry(VLBI)group delay between the lander and the rover,the delta VLBI phase delay can improve the relative position of the rover from*1,000 to*1 m.Yong Huang Shengqi Chang Peijia Li Xiaogong Hu Guangli Wang Qinghui Liu Weimin Zheng Min Fan 2014Chinese Science Bulletin2014,59,29:28
13A shallow aftershock sequence in the north-eastern end of the Wenchuan earthquake aftershock zone显示文摘Previous studies show that mature faults are filled with fault gouge in the shallow part and thus cannot accumulate enough strain energy for earthquakes. Therefore most earthquakes are deeper than 5 km, except those events occurring on new faults or in intact rocks. From field observation, Wenchuan earthquake is found to rupture the free surface about 200 km, but the rupture may extend underground much further from teleseismic body waves inversion and aftershocks distribution. In the northeastern end of the rupture zone, deep rupture may induce stress increase near the free surface, and trigger shallow earthquakes. An Ms 5.7 aftershock occurred at Qingchuan, northeast end of Wenchuan earthquake fault on July 24, 2008, featuring thrust mechanism with a 3 km source centroid depth. The shallow focal depth is confirmed with the sPL phase recorded at station L0205. As Rayleigh wave is well only developed for source depth less than 1/5 of epicentral distance, the observed large amplitude of Rg at a distance of 15 km implied depth of 3 km or less. Dozens of aftershocks' sPL waveforms are also analyzed to confirm the source depths less than 3 km. On the other hand, no surface ruptures are found by geological survey or InSAR studies. It is strongly suggested that these aftershock sequences initiate fresh rupture in intact rocks triggered by stress increase from the deep co-seismic rupture of the Wenchuan mainshock.Luo Yan Ni SiDao Zeng XiangFang Zheng Yong Chen QiFu Chen Yong 2010Science China Earth Sciences2010,53,11:26
14Comparison of Diver CE and ZEEK manual aspiration catheters for thrombectomy in ST-segment elevation myocardial infarction显示文摘数据的背景 A 成长体积建议直接 stenting 跟随的简单用手的血栓渴望与常规主要一种总线标准相比改进心肌的灌注和临床的结果,但是仍然有有限数据,比较在里面在不同设备之中的 vivo 性能。这研究试图由 Diver CE 比较血栓渴望的功效和操作性( Invatec , Brescia ,意大利 )并且 ZEEK ( Zeon 医药公司,东京,日本)在圣片断举起的渴望导管心肌的梗塞( STEMI )和他们到2008年6月的从2004年9月的3月的 outcome.Methods 上的影响,收到了用手的血栓渴望的有 STEMI 的 298 个连续病人涉及一个单个中心回顾的分析。他们, 229 和 69 分别地与 Diver CE 和 ZEEK 渴望导管被对待。主要端点是心肌的脸红等级(MBG ) ,在心肌的梗塞(TIMI ) 的 thrombolysis 流动等级,圣片断举起决定(STR ) ,设备 pushability 和由由把发成送气音的血栓症的尺寸分发显示了的双指南电线和渴望功效的用法的频率判定了的可跟踪性。第二等的端点是包括左室的结束的3月的结果心脏舒张的直径( LVEDD ),左室的喷射部分( LVEF ),以及心脏的死亡,目标损害 revascularization ( TLR ),主要不利心脏的事件(向) .Results 基线特征不在二个组之间是不同的重新梗塞和他们的联合为比在 Diver CE 组( Diver CE )的在 ZEEK 组( ZEEK )的暂时的心脏的踱步的更高的频率期望(0.44%对5.8%, P=0.002 )。可见检索血栓症在 65.9% Diver CE 和 68.1% ZEEK (P=0.74 ) 被完成。把发成送气音的血栓症作为小血栓症被分类(< 3.5 公里) ,中等血栓症(3.5-7.0 公里) 和大血栓症(> 7.0 公里) 。小血栓症是经常在 Diver CE (61.6% 对 42.6%) 看见的更多,而中等、更大的血栓症更经常在 ZEEK (38.4% 对 57.4%)(P=0.021 ) 被发现。双电线利用的率是 1.7% Diver CE 和 7.2% ZEEK (P=0.052 ) 。在在二个组之间的 MBG, STR 和 TIMI 流动等级没有差别。没有差别两个都在 3 月的 follow-up.Conclusions 期间在在 Diver CE 和 ZEEK 之间的心脏的死亡, TLR,重新梗塞,向, LVEDD 和 LVEF 被发现 Diver CE 和 ZEEK 用手的渴望导管为在 STEMI 的 thrombectomy 是有效的。在临床的实践, ZEEK 介绍一个更强壮的渴望能力为与 Diver CE,而是 Diver CE 显示相比节制到大血栓症向更好的 pushability 和可跟踪性的一个趋势比 ZEEK。在在在这个背景的 Diver CE 和 ZEEK 之间的渴望能力和操作性的差别不影响心肌的灌注和 3 月的结果。ZHAO Han-jun YAN Hong-bing WANG Jian SONG Li LI Qing-xiang LI Shi-ying CHI Yun-peng WU Zheng ZHANG Xiao-jiang ZHAO Yong ZHENG Bin 2009Chinese Medical Journal2009,,6:25
15Effect of HCV NS_3 protein on P53 protein expression in hepatocarcinogenesis显示文摘NTRODUCTIONHepatocelularcarcinoma(HCC)isoneofthemostcommonhumancancersintheworld.Recently,theHCVinfectionwasfoundtobeanetiolo...FENG De Yun, CHEN Rui Xue, PENG Yong, ZHENG Hui and YAN Ya Hui 1999World Journal of Gastroenterology1999,5,1:25
16Numerical description of coalbed methane desorption stages based on isothermal adsorption experiment显示文摘Quantitative description of desorption stages of coalbed methane is an important basis to objectively understand the production of coalbed methane well,to diagnose the production state,and to optimize the management of draining and collection of coalbed methane.A series of isothermal adsorption experiments were carried out with 12 anthracite samples from 6 coalbed methane wells located in the south of the Qinshui Basin,based on the results of isothermal adsorption experiments,and an analytical model was developed based on the Langmuir sorption theory.With the model,a numerical method that adopts equivalent desorption rate and its curve was established,which can be used to characterize the staged desorption of coalbed methane.According to the experimental and numerical characterizations,three key pressure points determined by the equivalent desorption rate curvature that defines pressure-declining desorption stage,have been proposed and confirmed,namely,start-up pressure,transition pressure and sensitive pressure.By using these three key pressure points,the process of coalbed methane desorption associated with isothermal adsorption experiments can be divided into four stages,i.e.,zero desorption stage,slow desorption stage,transition desorption stage,and sensitive desorption stage.According to analogy analysis,there are differences and similarities between the processes of coalbed methane desorption identified by isothermal adsorption experiments and observed in gas production.Moreover,it has been found that larger Langmuir volume and ratio of Langmuir constants are beneficial to earlier advent of steady production stage,whereas it is also possible that the declining production stage may occur ahead of schedule.ZHANG Zheng QIN Yong Geoff X WANG FU XueHai 2013Science China Earth Sciences2013,56,6:25
17Induction of apoptosis of human gastric carcinoma SGC-7901 cell line by 5,7-dihydroxy-8-nitrochrysin in vitro显示文摘AIM: To investigate the effect of 5, 7-dihydroxy-8- nitrochrysin (NOChR) on apoptosis of human gastric carcinoma SGC-7901 cell line. METHODS: SGC-7901 cells were cultured in vitro and the inhibitory effect of NOChR on proliferation of SGC-7901 cells was measured by using an MTT assay. NOChR-induced apoptosis rate of SGC-7901 cells was detected using flow cytometry (FCM) with PI staining. DNA ladder bands were observed by DNA agarose gel electrophoresis. The influence of NOChR on the proxisome proliferator-activated receptor-γ (PPARγ), Bcl-2 and Bax protein expression of SGC-7901 cells was analyzed by Western blot. RESULTS: MTT assay showed that NOChR markedly inhibited proliferation of SGC-7901 cells in a dose- dependent manner, and when IC50 was 4.14 μmol/L, the potency of NOChR was 10 times than that of lead compound, chrysin (ChR, IC50 was 40.56 μmol/L), and was similar to 5-fluorouracil (5-FU, IC50 was 4.51 μmol/L). FCM with propidium iodide (PI) staining demonstrated that the apoptosis rates of SGC-7901 cells treated with 1.25, 5.00 and 20.00 μmol/L NOChR for 48 h were 9.8% ± 0.2%, 36.8% ± 1.9% and 45.5% ± 3.5%, respectively, and were significantly higher when treated with 5.00 and 20.00 μmol/L NOChR than that with 20.00 μmol/L ChR (12.9% ± 1.5%). DNA agarose gel electrophoresis showed that treatment of SGC-7901 cells with 20.00 μmol/L NOChR for 48 h resulted in typical DNA ladder bands of DNA of SGC-7901 cells, which could be eliminated by treating with 10.00 μmol/L GW9662, a blocker of PPARγ. Western blot analysis revealed that after 24 h of treatment with 20.00 μmol/L NOChR, PPARgamma and Bax protein expression of SGC-7901 cells increased but Bcl-2 expression decreased; however, pre-incubation with 10.00 μmol/L GW9662 could efficiently antagonize and weaken the regulatory effect of 20.00 μmol/L NOChR on Bax and Bcl-2 protein expression of SGC-7901 cells. CONCLUSION: NOChR induces apoptosis of SGC-7901 cell lines by activating PPARγ and decreasing ratio of Bcl-2 to Bax.Xiao-Hong Ai Xing Zheng Xiao-Qing Tang Li Sun Yang-Qin Zhang Yong Qin Hua-Qing Liu Hong Xia Jian-Guo Cao 2007World Journal of Gastroenterology2007,13,28:22
18Role of adjuvant chemoradiotherapy in treatment of resectable esophageal carcinoma: a meta-analysis显示文摘ZHENG Bin ZHENG Wei ZHU Yong LIN Xiao-yan XU Ben-hua CHEN Chun 2013Chinese Medical Journal2013,,6:22
19Long-term propagation of tree shrew spermatogonial stem cells in culture and successful generation of transgenic offspring显示文摘树鼯有一种靠近的关系到首领并且在生物医学的研究比啮齿类动物有许多优点。然而,基因操作方法的缺乏妨碍了这个动物的更宽的使用。Spermatogonial 干细胞(SSC ) 成功地在文化被扩展了允许复杂基因在老鼠和老鼠编辑。这里,没有干细胞性质的损失,我们为树鼯 SSC 的长期的扩大描述一个文化系统。在我们的学习,胸腺房间抗原 1 被用来充实树鼯 SSC。定序 RNA 分析表明表明小径的 Wnt/-catenin 在无差别的 SSC 是活跃的,但是是在 SSC 区别的开始之上的 downregulated。树鼯的暴露到 recombinant Wnt3a 蛋白质的主要 SSC 在文化的起始的段落期间提高了 SSC 的幸存。当 feeder 被发现为树鼯 SSC 增长必要,树鼯 Sertoli 房间,然而并非老鼠使用胚胎的成纤维细胞,导致柔韧的房间扩大和长期的文化。扩展的树鼯 SSC 是有提高的绿色的 transfected 荧光灯表示 lentiviral 向量的蛋白质(EGFP ) 。在进消毒的成年的男树鼯睾丸的移植以后,标注 EGFP 的 SSC 能恢复精子发生并且成功地产生转基因的后代。而且,这些 SSC 对 CRISPR/Cas9-mediated 基因修正合适。在有编辑的基因的联合的树鼯 SSC 接近膨胀的一个文化系统的发展用树鼯为精确染色体操作铺平道路。Chao-Hui Li Lan-Zhen Yan Wen-Zan Ban Qiu TH Yong Wu Lin Wang Rui Bi Shuang Ji Yu-Hua Ma Wen-Hui Nie Long-Bao Lv Yong-Gang Yao Xu-Dong Zhao Ping Zheng 2017Cell Research2017,27,2:22
20Molecular mechanisms of diabetic coronary dysfunction due to large conductance Ca2+-activated K+ channel impairment显示文摘WANG Ru-xing SHI Hai-feng CHAI Qiang WU Ying SUN Wei JI Yuan YAO Yong LI Ku-lin ZHANG Chang-ying ZHENG Jie GUO Su-xia LI Xiao-rong LU Tong 2012Chinese Medical Journal2012,,14:21
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