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1080篇 您的检索式:作者名="Heng Zhang"
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1Advances and Trends on Tube Bending Forming Technologies显示文摘作为有庞大的数量和差异的一个种关键部件,弄弯的试管部分从材料和结构方面为无足轻重的人和高张力产品满足增加的需要。弄弯的试管广泛地在象航空,太空,造船,汽车,精力和护理那样的许多高端工业被使用了。弯曲的试管成为了为小产品形成生产技术的钥匙之一。经由把特征和多重缺点弄弯的分析,在试管弯曲探索普通问题上的进展在穹隆之内面关于起皱的不稳定性被总结,墙变瘦(裂开) 在拱背, springback 现象,剖面图变丑,形成的限制和过程 / 工具设计 / 优化。一些当前发达的弯曲技术以他们的优点和限制被考察。最后,鉴于高效的建筑群的迫切要求,在航空与 difficult-to-deform 和小材料把试管部件弄弯,太空域,发展趋势和相应挑战为认识到把变丑弄弯的精确、高效率的试管被介绍。YANG He LI Heng ZHANG Zhiyong ZHAN Mei LIU Jing LI Guanjun 2012Chinese Journal of Aeronautics2012,25,1:86
2Multiple genetic alterations and behavior of cellular biology in gastric cancer and other gastric mucosal lesions:H.pylori infection,histological types and staging显示文摘AIM To investigate the expression of multiplegenes and the behavior of cellular biology ingastric cancer(GC)and other gastric mucosallesions and their relations to Helicobacter pylori(H.pylori)infection,tumor staging andhistological subtypes.METHODS Three hundred and twenty-sevenspecimens of gastric mucosa obtained viaendoscopy or surgical resection,and ABCimmunohistochemical staining were used todetect the expression of p53,p16,Bcl-2 andCOX-2 proteins.H.pylori was determined byrapid urea test combined with pathologicalstaining or14C urea breath test.Cellular image analysis was performed in 66 patients withintestinal metaplasia(IM)and/or dysplasia(Dys).In 30 of them,both cancer and theparacancerous tissues were obtained at the timeof surgery.Histological pattern,tumor staging,lymph node metastasis,grading ofdifferentiation and other clinical data werestudied in the medical records.RESULTS p16 expression of IM or Dys wassignificantly lower in positive H.pylori chronicatrophic gastritis(CAG)than those withnegative H.pylori(CAG:54.8% vs 88.0%,IM:34.4% vs 69.6%,Dys:23.8% vs 53.6%,allP<0.05),Bcl-2 or COX-2 expression of IM orDys in positive H.pylori cases was significantlyhigher than that without H.pylori(Bcl-2:68.8%vs23.9%,90.5% vs 60.7%;COX-2:50.0% vs10.8%,61.8% vs 17.8%;all P<0.05).Themean number of most parameters of cellularimage analysis in positive H.pylori group wassignificantly higher than that in negative H.pylori group(Ellipser:53±14,40±12μm,Area1:748±572,302±202 μm2,Area2:3050±1661,1681±1990 μm2,all P<0.05;Ellipseb:79±23,58±15 μm,Ratio1:22%±5%,13%±4%,Ratio2:79%±17%,53%±20%,all P<0.01).There was significant correlation between Bcl-2and histologic pattern of gastric carcinoma,andbetween COX-2 and tumor staging or lymph nodemetastasis(Bcl-2:75.0% vs 16.7%;COX-2:76.0% vs 20.0%,79.2% vs 16.7%;allP<0.05).CONCLUSION p1l6, Bcl-2, and COX-2 but not p53 gene may play a role in the early genesis/ progression of gastric carcinoma and are associated with H. pylori infection. p53 gene is relatively late event in gastric tumorigenesis and mainly relates to its progression. There is more cellular-biological behavior of malignant tumor in gastric mucosal lesions with H. pylori infection. Aberrant Bcl-2 protein expression appears to be preferentially associated with the intestinal type cancer. COX-2 seems to be related to tumor staging and lymph node metastasis.Heng Jun Gao Lian Zhen Yu Jian Feng Bai Yan Shen Peng Gu Sun Han Lin Zhao Kun Miu Xiu Zhen Lü Xiao Yong Zhang Zhi Quan Zhao 2000World Journal of Gastroenterology2000,6,6:52
3Cardioprotection of sevoflurane postconditioning by activating extracellular signal-regulated kinase 1/2 in isolated rat hearts^1显示文摘瞄准:1/2 免于的细胞外的调整信号的 kinase (英皇家空军之阶级最低之兵) 的激活是化学家灌注损害。ERK1/2 是否调停 sevoflurane 柱子调节的 cardioprotection 是未知的。我们测试了 sevoflurane 柱子调节是否经由 ERK1/2-depen-dent 机制生产 cardioprotection。方法:在协议 1 , 酒Langendorff 的 Sprague Dawley 老鼠心( n=84 , 12 每组)与假冒的组的异常,受到 90 min 灌注跟随的 30 min 局部缺血并且被分到未经治疗(控制)组,由 4 个周期列在后面是化学家帖子调节(各个的 25 s ),3%( v/v ) sevoflurane 帖子调节(为 5 min 和冲刷的 10 min ),并且 PD98059 溶剂 DMSO (<0.2%), ERK1/2 禁止者 PD98059 ( 20 μmol/L ),和 Sevo+PD 管理。在平衡的 30 min 的左室的 hemodynamics 和冠的流动分别地在灌注的 30, 60,和 90 min 被记录。尖锐梗塞尺寸被 triphenyltetrazolium 氯化物染色测量。线粒体的配置被一台电子显微镜观察。西方的污点分析被用来在灌注的结束决定 cytosolic 和 mitochondrial 细胞色素 c 的内容。在协议 2,在灌注的 15 min 以后,总数的表示和 ERK1/2 和它的下游的目标 p70S6K 的 phosphorylated 形式由西方的弄污是坚定的。结果:在基线 hemodynamics 的差别都没在试验性的组(P>0.05 ) 之中被观察。在灌注以后,与控制组相比, sevoflurane 柱子调节并且显著地是化学家柱子调节(P<0.05 ) 改进了功能的恢复并且(P<0.05 ) 大部分减少了心肌的梗塞尺寸(22.9%± 4 .6% 和 21.2%± 3 .8% ,对 39.4%± 5 .7% ,两 P<0.05 ) 。调停 Sevoflurane 的保护被 PD98059 废除。结论:由 sevoflurane 的麻药柱子调节有效地由在 vitro 激活 ERK1/2 免于灌注损坏。Hong-tao CHEN Cheng-xiang YANG Heng LI Cheng-jing ZHANG Xian-jie WEN Jun ZHOU You-ling Fan Teng HUANG Yin-ming ZENG 2008Acta Pharmacologica Sinica2008,29,8:41
4Zircon U-Pb age and Hf isotope of Quanyishang A-type granite in Yichang: Signification for the Yangtze continental cratonization in Paleoproterozoic显示文摘Zircon U-Pb age and Hf isotope, and major and trace element compositions were reported for granite at Quanyishang, which intruded into the Kongling complex in Yichang, Hubei Province. The results show that the Quanyishang granite is rich in silicon and alkalis but poor in calcium and magnesium, and displays enrichment in Ga, Y, Zr, Nb but depletion in Sr and Ba, exhibiting the post-orogenic A-type affinity. 90% zircons from the granite are concordant, and give a middle Paleoproterozoic magmatic crystallization age (mean 1854 Ma). Initial Hf isotope ratios (176Hf/177Hf)i of the middle Paleoproterozoic zircons range from 0.280863 to 0.281134 and they have negative εHf(t) values with a minimum of -26.3. These zircons give the depleted mantle model ages (TDM) of 2.9―3.3 Ga (mean 3.0 Ga), and the average crustal model ages (Tcrust) of 3.6―4.2 Ga (mean 3.8 Ga). A Mesoarchean grain with 207Pb/206Pb age of 2859 Ma has a slightly high TDM (3.4 Ga) but similar Tcrust (3.8 Ga) to the Paleoproterozoic zircons. All these data suggest that the source materials of the Quanyishang A-type granite are unusually old, at least ≥2.9 Ga (even Eoarchean). The event of crustal remelting, which resulted in the formation of the Quanyishang granite in the middle Paleoproterozoic, recorded the cratonization of the Yangtze conti- nent. The process may have relation to the extension and collapse of the deep crust with Archean ages, in response to the transition stage of the assembly and breakup of the Columbia supercontinent.XIONG Qing HENG JianPing YU ChunMei SU YuPing TANG HuaYun ZHANG ZhiHai 2009Chinese Science Bulletin2009,54,3:46
5Apoptosis and Proinflammatory Cytokine Responses of Primary Mouse Microglia and Astrocytes Induced by Human H1N1 and Avian H5N1 Influenza Viruses显示文摘Patients with an influenza virus infection can be complicated by acute encephalopathy and encephalitis. To investigate the immune reactions involved in the neurocomplication,mouse microglia and astrocytes were isolated,infected with human H1N1 and avian H5N1 influenza viruses,and examined for their immune responses. We observed homogeneously distributed viral receptors,sialic acid (SA)-α2,3-Galactose (Gal) and SA-α2,6-Gal,on microglia and astrocytes. Both viruses were replicative and productive in microglia and astrocytes. Virus-induced apoptosis and cytopathy in infected cells were observed at 24 h post-infection (p.i.). Expression of IL-1β,IL-6 and TNF-α mRNA examined at 6 h and 24 h p.i. was up-regulated,and their expression levels were considerably higher in H5N1 infection. The amounts of secreted proinflammatory IL-1β,IL-6 and TNF-α at 6 h and 24 h p.i. were also induced,with greater induction by H5N1 infection. This study is the first demonstration that both human H1N1 and avian H5N1 influenza viruses can infect mouse microglia and astrocytes and induce apoptosis,cytopathy,and proinflammatory cytokine production in them in vitro. Our results suggest that the direct cellular damage and the consequences of immunopathological injury in the CNS contribute to the influenza viral pathogenesis.Gefei Wang Juan Zhang Weizhong Li Yun Su Yuanli Gao Heng Zhang Guimei Lin Xiaoyang Jiao Kangsheng Li 2008Cellular & Molecular Immunology2008,5,2:28
6Therapeutic effects of Caspase-1 inhibitors on acute lung injury in experimental severe acute pancreatitis显示文摘AIM: To assess the therapeutic effect of Caspase-1 inhibitors (ICE-I) on acute lung injury (ALI) in experimental severe acute pancreatitis (SAP). METHODS: Forty-two SD rats were randomly divided into 3 groups: healthy controls (HC, n = 6); SAP-S group (n = 18); SAP-ICE-I group (n = 18). SAP was induced by retrograde infusion of 5% sodium taurocholate into the bile-pancreatic duct. HC rats underwent the same surgical procedures and duct cannulation without sodium taurocholate infusion. In SAP-S group, rats received the first intraperitoneal injection of isotonic saline 2 h after induction of acute pancreatitis and a repeated injection after 12 h. In SAP-ICE-I group, the rats were firstly given ICE inhibitors intraperitoneally 2 h after induction of pancreatitis. As in SAP-S group, the injection was repeated at 12 h. Serum IL-1β was measured by ELISA. Intrapulmonary expression of Caspase-1, IL-1β and IL-18 mRNA were detected by semi-quantitative RT-PCR. The wet/dry weight ratios and histopathological changes of the lungs were also evaluated. RESULTS: Serum IL-1β levels in SAP-S group were 276.77 ± 44.92 pg/mL at 6 h, 308.99 ± 34.95 pg/mL at 12 h, and 311.60 ± 46.51 pg/mL at 18 h, which were increased significantly (P < 0.01, vs HC). In SAP- ICE-I group, those values were decreased significantly (P < 0.01, vs SAP-S). Intrapulmonary expression of Caspase-1, IL-1β and IL-18 mRNA were observed in the HC group, while they were increased significantly in the SAP-S group (P < 0.01, vs HC). The expression of IL-1β and IL-18 mRNA were decreased significantly in the SAP- ICE-I group (P < 0.01, vs SAP-S), whereas Caspase-1 mRNA expression had no significant difference (P > 0.05). The wet/dry weight ratios of the lungs in the SAP-S group were increased significantly (P < 0.05 at 6 h, P < 0.01 at 12 h and 18 h, vs HC) and they were decreased significantly in the SAP-ICE-I group (P < 0.05, vs SAP-S).Caspase-1 inhibitors ameliorated the severity of ALI in SAP. CONCLUSION: Caspase-1 activation, and overproduction of IL-1β and IL-18 play an important role in the course of ALI, and Caspase-1 inhibition is effective for the treatment of ALI in experimental SAP.Xiao-Hua Zhang Ren-Min Zhu Wen-An Xu Hai-Jun Wan Heng Lu 2007World Journal of Gastroenterology2007,13,4:26
7Hypoxic preconditioning attenuates hypoxia/reoxygenation-induced apoptosis in mesenchymal stem cells显示文摘目的: 间充质的干细胞(MSC ) 是心脏的代替治疗的一个有希望的候选人。然而,因为差的血供给, ischemia-reperfusion,和煽动性的因素,移植 MSC 的多数乐意地在移植以后被失去。我们试图在 MSC.Methods 的 hypoxia/reoxygenation-induced apoptosis 上学习组织缺氧 preconditioning ( HPC )的效果: MSC 的三代被划分成 6 个组包括正常的组, hypoxia-reoxygenation ( H/R )组, cyclosporine A ( CsA ),和 HPC 10 min , 20 min ,并且 30 min 组织。 apoptotic 索引,房间生存能力, mitochondrial 膜电位, Bcl-2 和 bax 的易位,细胞外的调整激酶(英皇家空军之阶级最低之兵), Akt ,组织缺氧可诱导的因素 1-alpha ,并且脉管的内皮生长因素( VEGF )在 H/R treatment.Results 以后被测试: HPC 减少了 apoptotic 索引并且增加了 H/R.Moreover 导致的生存能力, HPC 显著地稳定了 mitochondrial 膜电位在调整 Bcl-2 和 VEGF 表达式上面,并且增加了英皇家空军之阶级最低之兵和 Akt.As 的磷酸化积极控制, CsA 有象 HPC 的一样的函数,除了支持英皇家空军之阶级最低之兵和 Akt 磷酸化并且在调整 VEGF.Conclusion 上面: HPC 对 H/R 经由稳定 mitochondrial 膜电位导致的 MSC apoptosis 有保护的效果在调整 Bcl-2 和 VEGF 上面,并且支持英皇家空军之阶级最低之兵和 Akt phosphorylation.HPC 为新奇干细胞protective 策略的开发有含意。Jian-an WANG Tie-long CHEN Jun JIANG Heng SHI Chun GUI Rong-hua LUO Xiao-jie XIE Mei-xiang XIANG Xing ZHANG 2008Acta Pharmacologica Sinica2008,29,1:25
8Mechanisms of Plant Responses and Adaptation to Soil Salinity显示文摘Soil salinity is a major environmental stress that restricts the growth and yield of crops.Understanding the physiological,metabolic,and biochemical responses of plants to salt stress and mining the salt tolerance-associated genetic resource in nature will be extremely important for us to cultivate salt-tolerant crops.In this review,we provide a comprehensive summary of the mechanisms of salt stress responses in plants,including salt stress-triggered physiological responses,oxidative stress,salt stress sensing and signaling pathways,organellar stress,ion homeostasis,hormonal and gene expression regulation,metabolic changes,as well as salt tolerance mechanisms in halophytes.Important questions regarding salt tolerance that need to be addressed in the future are discussed.Chunzhao Zhao Heng Zhang Chunpeng Song Jian-Kang Zhu Sergey Shabala 2020The Innovation2020,1,1:25
9A high-quality genome assembly of quinoa provides insights into the molecular basis of salt bladder-based salinity tolerance and the exceptional nutritional value显示文摘Changsong Zou Aojun Chen Lihong Xiao Heike M Muller Peter Ache Georg Haberer Meiling Zhang Wei Jia Ping Deng Ru Huang Daniel Lang Feng Li Dongliang Zhan Xiangyun Wu Hui Zhang Jennifer Bohm Renyi Liu Sergey Shabala Rainer Hedrich Jian-Kang Zhu Heng Zhang 2017Cell Research2017,27,11:22
10The cloning of 3'-truncated preS/S gene from HBV genomic DNA and its expression in transgenic mice显示文摘INTRODUCTIONHepatitis B virus (HBV) is regarded as one of themain etiologic factors involved in the developmentof human hepatocellular carcinoma (HCC).The open reading frame (orf)of X gene of HBVencoded a transactivating factor is the evidence thatstrongly supported the notion that the X gene ofHBV DNA integrated in HCC genomic DNA couldcontribute to the carcinogenesis of liver cells byactivation of some related cellular genesYi Ping Hu~1 Yu Cheng Yao~1 Jian Xiu Li~1 Xin Min Wang~1 Hong Li~2 Zhong Hua Wang~1 Zhang Heng Lei~3 1 Department of Cell Biology,Second Military Medical University,Shanghai 200433,China 2 Department of Biology,Department of Basic Medicine,West-China University of Medical Sciences,Chengdu 610041,China 3 Department of Biology,North Sichuan Medical College,Nanchong 637007,China 2000World Journal of Gastroenterology2000,6,5:18
11Reassessment of subacute MPTP-treated mice as animal model of Parkinson's disease显示文摘1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP ) 老鼠模型仍然是 Parkinsons 疾病(PD ) 的最通常使用的动物模型。有三个 MPTP 处理计划:尖锐、稍尖、长期。就到 PD 的经期和类似的优点而言,稍尖的模型经常被选择估计新候选人的有效性,但是变化为进一步要证实的这个模型遗体由稍尖的 MPTP 治疗和适当积极控制引起。这研究的目的是:为了估计稍尖的 MPTP 鼠标的值,并且发现有效的积极的药,在行为的性能,生物化学的变化和病理学的畸形的方面当模特儿。男 C57BL/6 老鼠与 MPTP 被注射(这研究的 30 mgThe 结果证明 RVR 与中高音(P=0.015 ) 被联系,著名计算机生产厂商(P=0.020 ) , IFNL3 rs12979860 (CC )(P=0.043 ) , rs12980275 (AA )(P=1 n 减少了饮食的 CF.Subjects/Methods:在饮食的 CF 的变化在参予重量损失试用的 61 个喂奶的女人之中被分析。食物吸入数据从 4 天称??Qiu-shuang ZHANG Yang HENG Zheng MOU Ju-yang HUANG Yu-he YUAN Nai-hong CHEN 2017Acta Pharmacologica Sinica2017,38,10:18
12‘Size effect’ related bending formability of thin-walled aluminum alloy tube显示文摘Aluminum alloy (Al-alloy) thin-walled (D/t > 20, diameter D, wall thickness t) bent tubes have attracted increasing applications in many industries with mass quantities and diverse specifications due to satisfying high strength to weigh ratio requirements of product manufacturing. However, due to nonlinear nature of bending with coupling effects of multiple factors, the similarity theory seems not applicable and there occurs a challenge for efficient and reliable evaluation of the bending formability of thin-walled tube with various bending specifications. Considering the unequal deformation and three major instabilities, the bending formability of thin-walled Al-alloy tube in changing tube sizes such as D and t are clarified via both the analytical and FE modeling/ simulations. The experiments of rotary draw bending are conducted to validate the theoretical models and further confirm 'size effect' related bending formability. The major results show that (1) The anti-wrinkling capability of tube decreases with the larger D and smaller t, and the effect significance of t is larger than that of D even under rigid supports; (2) The wall thinning increases with the larger D and smaller t, and this tendency becomes much more obvious under rigid supports; (3) The cross-section deformation increases with the larger D and smaller t according to the analytical model obtained intrinsic relationship, while this tendency becomes opposite due to the nonlinear role of mandrel die; (4) The size factor D/t can be used as a nondimensional index to evaluate both the bending formability regarding the wall thinning and cross-section deformation.Li Heng Yang He Zhang Zhiyong Wang Zekang 2013Chinese Journal of Aeronautics2013,26,1:16
13High porosity and low thermal conductivity high entropy(Zr0.2Hf0.2Ti0.2Nb0.2Ta0.2C显示文摘Porous ultra-high temperature ceramics(UHTCs)are promising for ultrahigh-temperature thermal insulation applications.However,the main limitations for their applications are the high thermal conductivity and densification of porous structure at high temperatures.In order to overcome these obstacles,herein,porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))C was prepared by a simple method combing in-situ reaction and partial sintering.Porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))C possesses homogeneous microstructure with grain size in the range of 100–500 nm and pore size in the range of 0.2–1μm,which exhibits high porosity of 80.99%,high compressive strength of 3.45 MPa,low room temperature thermal conductivity of 0.39 W·m^-1K^-1,low thermal diffusivity of 0.74 mm^2·s^-1and good high temperature stability.The combination of these properties renders porous high entropy(Zr(0.2)Hf(0.2)Ti(0.2)Nb(0.2)Ta(0.2))Cpromising as light-weight ultrahigh temperature thermal insulation materials.Heng Chen Huimin Xiang Fu-Zhi Dai Jiachen Liu Yiming Lei Jie Zhang Yanchun Zhou 2019Journal of Materials Science & Technology2019,35,8:16
14Advanced glycation end products promote human aortic smooth muscle cell calcification in vitro via activating NF-KB and down-regulating IGFIR expression显示文摘Yi WANG Zhen-yu ZHANG Xiao-qing CHEN Xiang WANG Heng CAO Shao-wen LIU 2013Acta Pharmacologica Sinica2013,34,4:16
15A Novel Chloroplast-Localized Pentatricopeptide Repeat Protein Involved in Splicing Affects Chloroplast Development and Abiotic Stress Response in Rice显示文摘Pentatricopeptide 重复(PPR ) 蛋白质在更高的植物包括一个大家庭并且在 organellar RNA 新陈代谢的各种各样的方面调制 organellar 基因表示 byparticipating。在米饭,家庭包含他们的功能仍然是的 477 个成员,和 majorityof 不清楚。在这研究,我们孤立并且描绘米饭变异的、白条纹叶(wsl ) ,它在开发早的显示萎黄病有条纹或刻痕之状态。基于地图的克隆表明 WSL 编码指向叶绿体的最新识别的米饭 PPR 蛋白质。在 wsl 异种,锐气依赖者质体基因表示是显著地下面调整的,并且质体 rRNAs 和翻译 productsaccumulate 到很底层。一致地与观察, wsl 在叶绿体抄本 rpl2 拼接显示出一个强壮的缺点,在异种导致异常抄本累积和它的产品减小。wsl 显示出提高的敏感到骆驼毛的织物,咸度,和糖,并且它积累更多的 H 2 O 2 比野类型。这些结果建议减少的翻译效率可以影响异种的反应到 abioticstress.Key 词:Junjie Tan Zhenhua Tan Fuqing Wu Peike Sheng Yueqin Heng Xinhua Wang Yulong Ren Jiulin Wang Xiuping Guo Xin Zhang Zhijun Cheng Ling Jiang Xuanming Liu Haiyang Wang Jianmin Wan 2014Molecular Plant2014,7,8:15
16Scour and silting evolution and its influencing factors in Inner Mongolian Reach of the Yellow River显示文摘有河的平衡的河被床变丑调整描绘。在剖面图的侵蚀免职区域反映这个特征,它是研究河的一个底搜索并且由时间系列分析的免职进化。与在这篇论文建议的一个侵蚀免职区域指示物方法,在 Bygl 和 Shhk 车站的侵蚀免职区域数量的时间系列从 1976 ~ 2006 与 31 年的系列持续时间被获得。在它的趋势和变化的分析以后,关于进化的三个不同趋势通过快速的收缩从伪平衡阶段一般来说被观察到最后的新伪平衡。一旦大洪水发生在一些支流,侵蚀免职区域系列的趋势将变化,这也被发现一旦大洪水发生在一些支流,并且它的曾经更大的影响由于有在上游的水库的结束的洪水的减少。几乎所有转弯的点与超沉积洪水发生在一些支流的时间是重合的。与清楚的变化的时间系列自从 1990 年代末,内部蒙古的活动范围在一个新平衡阶段。这能在二个方面被结束。1。从在河收缩的支流结果的大洪水和沉积交通的缺席,并且重获隧道在内部蒙古的活动范围的带流动的能力大洪水高山峰分泌物并且过长的间隔被需要破坏新平衡。2。因为它能在数量表明生气的节的实时变丑,侵蚀免职区域指示物的建议方法具有到隧道搜索免职进化分析的大帮助。QIN Yi ZHANG Xiaofang WANG Fenglong YAN Heng HAN Haijun 2011Journal of Geographical Sciences2011,21,6:14
17Changes in China’s lakes: climate and human impacts显示文摘Lakes have played a critical role in providing water and ecosystem services for people and other organisms in China for millennia.However,accelerating climate change and economic boom have resulted in unprecedented changes in these valuable lakes.Using Landsat images covering the entity of the country,we explored the changes in China’s lakes and the associated driving forces over the last 30 years(i.e.mid-1980 s to 2015).We discovered that China’s lakes have changed with divergent regional trends:in the sparsely populated Tibetan Plateau,lakes are abundant and the lake area has increased dramatically from 38596 to46831 km^2(i.e.increased by 8235 km^2,or 21.3%),whereas,in the densely populated northern and eastern regions,lakes are relatively scarce and the lake area has decreased from 36659 to 33657 km^2(i.e.decreased by 3002 km^2,or 8.2%).In particular,severe lake decreases occurred in the Mongolia-Xinjiang Plateau and the Eastern Plain(-2151 km^2).Statistical analyses indicated that climate was the most important factor controlling lake changes in the Tibetan Plateau,the Yun-Gui Plateau and the Northeast Plain.However,the strength of climatic control on lake changes was low in the Eastern Plain and the Mongolia-Xinjiang Plateau,where human activities,e.g.impoldering,irrigation and mining,have caused serious impacts on lakes.Further lake changes will exacerbate regional imbalances between lake resources and population distribution,and thus may increase the risk of water-resource crises in China.Shengli Tao Jingyun Fang Suhui Ma Qiong Cai Xinyu Xiong Di Tian Xia Zhao Leqi Fang Heng Zhang Jiangling Zhu Shuqing Zhao 2020National Science Review2020,7,1:14
18Overexpression and Immunosuppressive Functions of Transforming Growth Factor 1,Vascular Endothelial Growth Factor and Interleukin-10 in Epithelial Ovarian Cancer显示文摘Objective: Transforming growth factor-1 (TGF-β1), vascular endothelial growth factor (VEGF), and interleukin-10 (IL-10) may be critical cytokines in the microenvironment of a tumor, playing roles in immune suppression. This study was conducted to elucidate the roles and immunosuppressive functions of these cytokines in epithelial ovarian cancer (EOC). Methods: The expression levels of TGF-β1, VEGF and IL-10 in malignant tissue were evaluated by immune-histochemistry and compared with corresponding borderline, benign, and tumor-free tissues. Moreover, relationships among the levels of these cytokines and correlations between expression and the prognosis of EOC were analyzed by Pearson rank correlations and multi-factor Logistic regression. The roles of TGF-β1, VEGF, and IL-10 in the immunosuppressive microenvironment of ovarian cancer were studied through dendritic cell (DC) maturation and CD4+CD25+FoxP3+Treg generation in vitro experiments. Results: TGF-β1, VEGF, and IL-10 were expressed in 100%, 74.69%, and 54.96% of EOC patients, respectively. TGF-β1 was an independent prognostic factor for EOC. IL-10 was significantly co-expressed with VEGF. In vitro, VEGF and TGF-β1 strongly interfered with DC maturation and consequently led to immature DCs, which secreted high levels of IL-10 that accumulated around the tumor site. TGF-β1 and IL-10 induced Treg generation without antigen presentation in DCs. Conclusions: TGF-β1, VEGF and IL-10 play important roles in EOC and can lead to frequent immune evasion events.Chan-zhen Liu Li Zhang Xiao-hong Chang Ye-xia Cheng Hong-yan Cheng Xue Ye Tian-yun Fu Jun Chen Heng Cui 2012Chinese Journal of Cancer Research2012,24,2:13
19Polygalasaponin XXXII, a triterpenoid saponin from Polygalae Radix, attenuates scopolamine-induced cognitive impairments in mice显示文摘瞄准:最近的研究证明中国植物 Polygalae 根值的摘录在老鼠和人施加提高认知的行动。这研究的目的是描绘从 Polygalae Radix.Methods 提取的活跃混合物的药理学侧面:二部分 P3 和 P6 和二混合物 PTM-15 和 polygalasaponin XXXII (PGS32 ) 被准备。Neuroprotective 效果在暴露于高集中 glutamate,浆液缺乏或 H 2 O 2 。反痴呆行动用走彻底地回避测试和隧道水迷宫测试在老鼠在导致莨菪胺的健忘被估计。在进行隧道水迷宫测试以后,在老鼠马头鱼尾的怪兽的 TrkB phosphorylation 用西方的弄污被检测。长期的 potentiation (LTP ) 在成年老鼠在有牙齿的回转被导致;PGS32 (5 μ L 400 μ mol/L ) 被注入侧面的服的室在高频率刺激(HFS ) 以后的 20 min .Results:在老鼠在导致莨菪胺的健忘比作部分 P6,显示出的更突出的 neuroprotective 在 vitro 完成的部分 P3 和提高认知的效果。在部分 P3 的一活跃复合 PGS32 施加了有势力提高认知的行动:PGS32 的口头的管理(0.125 mg·为 19 天的 kg −1·d−1) 在老鼠废除了导致莨菪胺的记忆缺陷。而且, PGS32 (0.5 和 2 mg· kg −1·d−1) 显著地在马头鱼尾的怪兽刺激了 TrkB 的 phosphorylation。PGS32 的 Intracerebroventricular 注射显著地在 rats.Conclusion 的有牙齿的回转提高了导致 HFS 的 LTP:PGS32 在老鼠稀释导致莨菪胺的认知缺陷,建议它有为认知机能障碍和痴呆的处理的一个潜力。Heng ZHOU Wei XUE Shi-feng CHU Zhen-zhen WANG Chuang-jun LI Yi-na JIANG Lin-ming LUO Piao LUO Gang LI Dong-ming ZHANG Nai-hong CHEN 2016Acta Pharmacologica Sinica2016,37,8:12
20Effect of human epididymis protein 4 gene silencing on the malignant phenotype in ovarian cancer显示文摘背景人的 epididymis 能分泌的蛋白质(HE4 ) 4 被证明了是为上皮的卵巢的癌的察觉的有希望的新奇 biomarker。与 CA125 相比, HE4 试金表明了一个改进能力与恶意、良性的疾病在骨盆的质量之间区别。尽管然而, HE4 是在卵巢的癌症的 overexpressed,是众所周知的,在卵巢的癌症的 carcinogenesis 和前进的 HE4 的角色在这研究仍然是 unkown.Methods,我们在卵巢的癌症的 carcinogenesis 和前进探索了 HE4 的角色。我们为 HE4 表示,和使用的 RNA 干扰(RNAi ) 屏蔽了九根卵巢的癌症房间线,我们在 CaoV3 和 SKOV3.ip1 的 silenced HE4 基因表示卵巢的癌症房间线。我们由在 vitro.Results HE4 基因 silencing 检验房间周期, apoptosis,增长和 transwell 迁居 / 侵略在转变显型上估计了 HE4 基因 silencing 的效果导致 G0/G1 拘捕并且在 CaoV3 和 SKOV3.ip1 房间阻止 G1 接近前进到 S 阶段。HE4 在在 vitro.Conclusion HE4 的 SKOV3.ip1 房间的击倒的也禁止的房间增长,移植和侵略可以涉及房间周期的规定并且支持卵巢的癌症移植和侵略。ZOU Shu-li CHANG Xiao-hong YE Xue CHENG Hong-yan CHENG Ye-xia TANG Zhi-jian ZHANG Zu-juan GAO Li CHEN Xin-hua CUI Heng 2011Chinese Medical Journal2011,,19:12
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