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136篇 您的检索式:作者名="Zhang Xueqin"
    题名 作者 年代 出处 被引量
1Epidermal growth factor receptor (EGFR) T790M mutation identified in plasma indicates failure sites and predicts clinical prognosis in non-small cell lung cancer progression during first-generation tyrosine kinase inhibitor therapy: a prospective observational study显示文摘Introduction:Plasma circulating tumor DNA(ctDNA)is an ideal approach to detecting the epidermal growth factor receptor(EGFR)T790M mutation,which is a major mechanism of resistance to first-generation EGFR-tyrosine kinase inhibitor(TKI)therapy.The present study aimed to explore the association of ctDNA-identified T790M mutation with disease failure sites and clinical prognosis in non-small cell lung cancer(NSCLC)patients.Methods:Patients who progressed on first-generation TKIs were categorized into failure site groups of chest limited(CF),brain limited(BF)and other(OF).Amplification refractory mutation system(ARMS)and droplet digital PCR(ddPCR)were used to identify the T790M mutation in ctDNA.Prognosis was analyzed with Kaplan-Meier methods.Results:Overall concordance between the two methods was 78.3%.According to both ARMS and ddPCR,patients in the OF group had a significantly higher rate of T790M mutation than did patients in the BF and CF groups(P<0.001),and a significantly higher T790M mutation rate was also observed in OF-group patients than in those in the CF and BF groups(P<0.001).AZD9291 was found to be an excellent treatment option and yielded the longest survival for T790M+patients in all groups who had progressed on EGFR-TKIs;for other treatments,the prognosis of T790M−patient subgroups varied.Conclusions:The present study demonstrates that T790M mutation in ctDNA is associated with failure sites for NSCLC patients after EGFR-TKI therapy and indicates that both failure site and T790M mutational status greatly influ-ence treatment selection and prognosis.Shirong Zhang Lucheng Zhu Bing Xia Enguo Chen Qiong Zhao Xiaochen Zhang Xueqin Chen Xufeng Chen Shenglin Ma 2018Cancer Communications2018,38,1:12
2The Efficacy of High-Intensity Focused Ultrasound (HIFU) in Advanced Pancreatic Cancer显示文摘OBJECTIVE To observe the efficacy of high-intensity focused ultrasound (HIFU) in the treatment of late-stage pancreatic cancer. METHODS Sixteen patients with advanced pancreatic cancer received HIFU therapy.Evaluation of efficacy was made on the basis of changes in clinical symptoms and variations in the tumor echo and size. RESULTS Clinical symptoms such as pain were significantly alleviated,echo of the tumor was enhanced with B-US and the quality of life such as eating,sleeping and mental status was markedly improved;no serious complications were observed. CONCLUSION The use of HIFU in the treatment of advanced pancreatic cancer is feasible and safe.It is effective in killing the carcinoma cells and alleviating pain.This technique may offer non-invasive therapy for the treatment of patients with late-stage pancreatic cancer.Bo Xie Jiajun Ling Weiming Zhang Xueqin Huang Jihua Zhen Yanzhe Huang 2008Chinese Journal of Clinical Oncology2008,5,3:12
3Study on stabilities and electrochemical behavior of V(V) electrolyte with acid additives for vanadium redox flow battery显示文摘Several acid compounds have been employed as additives of the V(V) electrolyte for vanadium redox flow battery(VRB) to improve its stability and electrochemical activity. Stability of the V(V) electrolyte with and without additives was investigated with ex-situ heating/cooling treatment at a wide temperature range of-5 ?C to 60 ?C. It was observed that methanesulfonic acid, boric acid, hydrochloric acid, trifluoroacetic acid,polyacrylic acid, oxalic acid, methacrylic acid and phosphotungstic acid could improve the stability of the V(V) electrolyte at a certain range of temperature. Their electrochemical behaviors in the V(V) electrolyte were further studied by cyclic voltammetry(CV), steady state polarization and electrochemical impedance spectroscopy(EIS). The results showed that the electrochemical activity, including the reversibility of electrode reaction, the diffusivity of V(V) species, the polarization resistance and the flexibility of charge transfer for the V(V) electrolyte with these additives were all improved compared with the pristine solution.Gang Wang Jinwei Chen Xueqin Wang Jing Tian Hong Kang Xuejing Zhu Yu Zhang Xiaojiang Liu Ruilin Wang 2014Journal of Energy Chemistry2014,23,1:10
4Morphological responses to water-level fluctuations of two submerged macrophytes, Myriophyllum spicatum and Hydrilla verticillata显示文摘Aims Myriophyllum spicatum and Hydrilla verticillata are common submerged macrophytes in the Yangtze River basin.To investigate their tolerances and adaptations to water-level fluctuations,an experiment was conducted in a pond.Methods We designed five different amplitudes of water-level fluctuations as static,615,630,660 and 690 cm during the 74 days of the experiment.In each amplitude treatment,two cultivation methods were examined as monoculture and mixed culture.Important Findings The results showed that M.spicatum had greater morphological responses to water-level fluctuations than H.verticillata.Fluctuating amplitude had significant effects on branch number,shoot length and root dry weight(DW)of M.spicatum,whereas it only had significant effect on branch number of H.verticillata.Both fluctuating amplitude and cultivation method had significant effects on total DW of M.spicatum,which was higher in monoculture than mixed culture.The total DW of H.verticillata was affected by fluctuating amplitude only,and the largest biomass was in the amplitude of 630 cm.Fruit DW of M.spicatum was largest in the amplitude of 630 cm,high amplitude of water-level fluctuations would inhibit flowering and seed production.Root DW proportion was significantly affected by fluctuating amplitude and cultivation method in both species,and the root DW proportion of M.spicatum was significantly higher in the amplitude-of 690 cm.We conclude that moderate amplitude of water-level fluctuations can promote the distribution and growth of both species,and in order to accelerate the restoration of both species in natural habitats,the optimum amplitude should be keep at 615 to 630 cm.Xiaoke Zhang Xueqin Liu Qingzhang Ding 2013Journal of Plant Ecology2013,6,1:10
5Simpler criterion on W state for perfect quantumstate splitting and quantum teleportation显示文摘A simpler criterion is presented to judge whether a W state can be taken as quantum channel forperfectly splitting or teleporting an arbitrary single-qubit state. If the W state is usable,the detailed manipulations in the two quantum information processes are amply shown. Moreover,some relevant discussions are made.ZUO XueQin LIU YiMin ZHANG Wen ZHANG ZhanJun 2009Science China(Physics,Mechanics & Astronomy)2009,52,12:10
6Progress and challenges towards additive manufacturing of SiC ceramic显示文摘Silicon carbide(SiC)ceramic and related materials are widely used in various military and engineering fields.The emergence of additive manufacturing(AM)technologies provides a new approach for the fabrication of SiC ceramic products.This article systematically reviews the additive manufacturing technologies of SiC ceramic developed in recent years,including Indirect Additive Manufacturing(Indirect AM)and Direct Additive Manufacturing(Direct AM)technologies.This review also summarizes the key scientific and technological challenges for the additive manufacturing of SiC ceramic,and also forecasts its possible future opportunities.This paper aims to provide a helpful guidance for the additive manufacturing of SiC ceramic and other structural ceramics.Rujie HE Niping ZHOU Keqiang ZHANG Xueqin ZHANG Lu ZHANG Wenqing WANG Daining FANG 2021Journal of Advanced Ceramics2021,10,4:9
7A novel two-stage extended Kalman filter algorithm for reaction flywheels fault estimation显示文摘This paper investigates the problem of two-stage extended Kalman filter(TSEKF)-based fault estimation for reaction flywheels in satellite attitude control systems(ACSs). Firstly, based on the separate-bias principle, a satellite ACSs with actuator fault is transformed into an augmented nonlinear discrete stochastic model; then, a novel TSEKF is suggested such that it can simultaneously estimate satellite attitude information and actuator faults no matter they are additive or multiplicative; finally, the proposed approach is respectively applied to estimating bias faults and loss of effectiveness for reaction flywheels in satellite ACSs, and simulation results demonstrate the effectiveness of the proposed fault estimation approach.Chen Xueqin Sun Rui Jiang Wancheng Jia Qingxian Zhang Jinxiu 2016Chinese Journal of Aeronautics2016,29,2:7
8Hydrochemical regime and its mechanism in Yamzhog Yumco Basin, South Tibet显示文摘The hydrochemistry of alpine lakes reflects water characteristic and its response to climatic change. Over 300 water samples had been collected from 52 sites of 5 lakes and 7 inflowing rivers in the Yamzhog Yumco Basin, South Tibet, during 2009–2014, basing which the hydrochemical regime and its mechanism were analyzed along with the adoption of hydrological investigations in 1979 and 1984 as well. Results revealed that the waters were hard with weak alkalinity for the Yamzhog Yumco Basin. Most of them were fresh, and the rest were slightly saline. The hydrochemical types of 5 lakes(i.e., Lake Yamzhog Yum Co, Puma Yum Co, Bajiu Co, Kongmu Co, and Chen Co) were SO_4^(2–)–HCO_3~––Mg^(2+)–Na^+, HCO_3~–– SO2–2+4–Mg^(2+)–Ca, SO_4^(2–)–Mg^(2+)–Na^+, SO_4^(2–)–HCO_3~––Ca^(2+), and SO_4^(2–)–Na^+–Mg^(2+)–Ca^(2+), respectively. As for rivers, HCO_3~– and SO_4^(2–) were the major anions, and Ca^(2+) was the dominant cation. Lake Yamzhog Yum Co, the largest lake in the basin, exhibited remarkable spatial variations in hydrochemistry at its surface but irregular changes with depth. The weathering of evaporates and carbonates, together with evaporation and crystallization, were the major mechanisms controlling the hydrochemistry of waters in the Yamzhog Yumco Basin. Global warming also had significant impacts on hydrochemical variations.ZHE Meng ZHANG Xueqin WANG Buwei SUN Rui ZHENG Du 2017Journal of Geographical Sciences2017,27,9:7
9Simpler criterion and flexibility of operation complexity for perfectly teleporting arbitrary n-qubit state with 2n-qubit pure state显示文摘A criterion for whether a pure-state quantum channel consisting of 2n qubits averagely distributed between two nodes can be used for perfectly teleporting an arbitrary n-qubit state via Bell-state measurements is educed.Specifically,a matrix is composed of the coefficients of the known channel state and whether the matrix is unitary decides the criterion.As the criterion is apparently different from the usual standard entanglement criterion (USEC),its applicability is enlarged and verified by other measuring bases.Thorough analyses have further simplified the resultant criterion,so that a much simpler criterion than the USEC is conclusively obtained.Moreover,the flexibility of operation complexity between the non-unitary measurements and the unitary reconstructions is explicitly exhibited.ZUO XueQin 1,LIU YiMin 2,ZHANG ZiYun 1,ZHANG Wen 1 & ZHANG ZhanJun 1 1 Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China,School of Physics & Material Science,Anhui University,Hefei 230039,China 2 Department of Physics,Shaoguan University,Shaoguan 512005,China 2010Science China(Physics,Mechanics & Astronomy)2010,53,11:5
10Incorporating the magnetic alignment of GO composites into Pebax matrix for gas separation显示文摘The mixed matrix membranes(MMMs) were developed by incorporating graphite oxide(GO) flakes functionalized with iron oxide(Fe_3O_4) into Pebax matrix. The Pebax/Fe_3O_4–GO MMMs were used to separate CO_2/CH_4 and CO_2/N_2 gas mixture. The results showed that the MMMs with magnetic alignment presented the better gas separation performance than that of random arrangement of Pebax/Fe_3O_4–GO mixed matrix membranes. The reason was that the Fe_3O_4–GO flakes arranged magnetically in the membrane played a multiple role in improving the performance of MMMs. Firstly, under the action of the magnetic field,the magnetic alignment of Fe_3O_4–GO flakes in Pebax matrix constructed the shorter transfer path for gas molecule, increasing the CO_2 permeability. Secondly, the hydroxyl groups in GO flakes and the presence of Fe_3O_4 have stronger binding force for water, improving the CO_2 solubility selectivity. Thirdly, the better interaction between the magnetic alignment of GO composites and polymer matrix, reduced the interface defects. Especially, the optimum gas separation performance was obtained at the Fe_3O_4–GO flakes content of 3 wt% in Pebax matrix at vertical arrangement with selectivity of 47 and 75 for CO_2/CH_4 and CO_2/N_2, respectively, and CO_2 permeability of 538 Barrer at 0.2 MPa and room temperature.Weifang Zhu Yun Qin Zhongming Wang Jianshu Zhang Ruili Guo Xueqin Li 2019Journal of Energy Chemistry2019,28,4:5
11The heterogeneity of islet autoantibodies and the progression of islet failure in type 1 diabetic patients显示文摘Type 1 diabetes mellitus is heterogeneous in many facets. The patients suffered from type 1 diabetes present several levels of islet function as well as variable number and type of islet-specific autoantibodies. This study was to investigate prevalence and heterogeneity of the islet autoantibodies and clinical phenotypes of type 1 diabetes mellitus; and also discussed the process of islet failure and its risk factors in Chinese type 1 diabetic patients. A total of 1,291 type 1 diabetic patients were enrolled in this study. Demographic information was collected. Laboratory tests including mixed-meal tolerance test, human leukocyte antigen alleles, hemoglobin A1 c, lipids, thyroid function and islet autoantibodies were conducted. The frequency of islet-specific autoantibody in newly diagnosed T1 DM patients(duration shorter than half year) was 73% in East China. According to binary logistic regressions, autoantibody positivity, longer duration and lower Body Mass Index were the risk factors of islet failure. As the disease developed, autoantibodies against glutamic acid decarboxylase declined as well as the other two autoantibodies against zinc transporter 8 and islet antigen 2. The decrease of autoantibodies was positively correlated with aggressive beta cell destruction. Autoantibodies can facilitate the identification of classic T1 DM from other subtypes and predict the progression of islet failure. As there were obvious heterogeneity in autoantibodies and clinical manifestation in different phenotypes of the disease, we should take more factors into consideration when identifying type 1 diabetes mellitus.Jin Liu Lingling Bian Li Ji Yang Chen Heng Chen Yong Gu Bingqin Ma Wei Gu Xinyu Xu Yun Shi Jian Wang Dalong Zhu Zilin Sun Jianhua Ma Hui Jin Xing Shi Heng Miao Bing Xin Yan Zhu Zhenwen Zhang Ruifang Bu Lan Xu Guangde Shi Wei Tang Wei Li Dongmei Zhou Jun Liang Xingbo Cheng Bimin Shi Jixiang Dong Ji Hu Chen Fang Shao Zhong Weinan Yu Weiping Lu Chenguang Wu Li Qian Jiancheng Yu Jialin Gao Xiaoqiang Fei Qingqing Zhang Xueqin Wang Shiwei Cui Jinluo Cheng Ning Xu Guofeng Wang Guoqing Han Chunrong Xu Yun Xie Minmin An Wei Zhang Zhixiao Wang Yun Cai Qi Fu Yu Fu Shuai Zheng Fan Yang Qingfang Hu Hao Dai Yu Jin Zheng Zhang Kuanfeng Xu Yifan Li Jie Shen Hongwen Zhou Wei He Xuqin Zheng Xiao Han Liping Yu Jinxiong She Mei Zhang Tao Yang 2016Science China(Life Sciences)2016,59,9:5
12Comments on 2018 CPCS guideline for diagnosis and treatment of syncopein children and adolescents显示文摘Syncope is one kind of transient loss of consciousness,due to transient global cerebral hypoperfusion.It is sometimes misunderstood with other causes of transient loss of consciousness,like epilepsy,metabolic disorders,head trauma,psychological factors,and so on.Syncope in children and adolescents is common and seriously impacts the quality of their lives.However,its pathogenesis,etiologies,diagnosis and management are complex.The studies on syncope attract great interest of pediatricians and great progress has been made in this interesting field.Based on the improvement achieved so far,Chinese Pediatric Cardiology Society(CPCS)successfully developed a guideline for the diagnosis and treatment of syncope in children and adolescents,which would greatly improve the level of clinical management of syncope.Chunyan Tao Xueqin Liu Chunyu Zhang Yonghong Chen? Yaqian Huang? 2019Science Bulletin2019,64,5:5
13Assessing site-safeguard effectiveness and habitat preferences of Bar-headed Geese (Anser indicus) at their stopover sites within the Qinghai-Tibet Plateau using GPS/ GSM telemetry显示文摘Background:The Bar-headed Goose(Anser indicus)breeds across the high plains and plateau of Central Asia and winters in the Qinghai-Tibet Plateau(QTP),the Yunnan-Guizhou Plateau and the Indian sub-continent.Of the two recognized discrete flyways of the Bar-headed Goose,the Eastern Tibetan Flyway(ETF)is the larger,comprising at least six migration routes.However,we remain ignorant about their migratory connectivity,habitat use and effectiveness of site-safeguard mechanisms set in place for the species.Methods:We tracked 30 ETF Bar-headed Geese from Chinese and Mongolian breeding areas to their wintering grounds using GPS/GSM transmitters,to determine their migration routes and stopover staging patterns within the QTP,overlaying these upon GIS layers of protected area status and habitat type,to model their habitat selection.Results:In total,14 tagged Bar-headed Geese provided information on their entire autumn migration and 4 geese on their entire spring migration.Qinghai Lake marked birds overwintered in the QTP(n=2),geese tagged in Mongolia wintered either in the QTP(n=3)or in India/Bangladesh(n=9),representing three of the migration routes within the ETF.In total,tagged birds staged at 79 different stopover sites within QTP in autumn and 23 in spring,of which 65%(autumn)and 59%(spring)of all fixes fell within the boundaries of either National Nature Reserves(NNRs)or Important Birds Areas(IBAs)in the QTP.Bar-headed Geese predominantly occurred on four land-cover types:grassland(mostly by day),water bodies(at night),wetlands and bare substrates(salt flats,dry lake/river substrates and plough)with little change in proportion.Generalized linear mixed models comparing presence with pseudo-absence data suggested geese strongly selected for wetlands as staging habitat,avoiding bare substrates in spring.Conclusions:Based on our limited observations of these tagged geese,this study is the first to show that the current designated National Nature Reserves in place in the staging areas within the QTP appear adequate to protect this increasing population.In addition,Hala Lake in Qinghai Province and adjacent areas used as initial QTP staging during autumn migration(currently outside of designated as NNRs/IBAs)are recommended for protection,based on their use by tagged birds from this study.Habitat modelling confirmed the importance of natural wetlands as feeding areas and safe areas of open water as roosting places.Junjian Zhang Yanbo Xie Laixing Li Nyambayar Batbayar Xueqin Deng Iderbat Damba Fanjuan Meng Lei Cao Anthony David Fox 2020Avian Research2020,11,4:5
14Sensitivity Analysis of P-Waves and S-Waves to Gas Hydrate in the Shenhu Area Using OBS显示文摘Compared to towed streamers, ocean-bottom seismometers(OBS) obtain both S-wave data and richer wavefield information. In this paper, the induced polarization method is used to conduct wavefield separation on OBS data obtained from the Shenhu area in the South China Sea. A comparison of the changes in P-and S-waves, and a comprehensive analysis of geological factors within the area, enable analysis and description of the occurrence of natural gas hydrate in the study area. Results show an increase in P-wave velocity when natural gas hydrate exists in the formation, whereas the S-wave velocity remains almost constant, as S-waves can only propagate through the rock skeleton. Therefore, the bottom-simulating reflection(BSR) response of the P-wave is better than that of the S-wave in the frequency analysis profile. In a wide-angle section, the refractive wave of the hydrate layer is evident when using P-wave components but identification is difficult with S-wave components. This velocity model illustrates the sensitivity of Pand S-wave components to gas hydrate. The use of this polarization method and results of analysis provide technical and theoretical support for research on hydrate deposits and other geological features in the Shenhu area.XING Lei LIU Xueqin ZHANG Jin LIU Huaishan ZHANG Jing LI Zizheng WANG Jianhua 2018Journal of Ocean University of China2018,17,1:5
15s-HBEGF/SIRT1 circuit-dictated crosstalk between vascular endothelial cells and keratinocytes mediates sorafenib-induced hand-foot skin reaction that can be reversed by nicotinamide显示文摘Hand-foot skin reaction(HFSR),among the most significant adverse effects of sorafenib,has been limiting the clinical benefits of this frontline drug in treating various malignant tumors.The mechanism underlying such toxicity remains poorly understood,hence the absence of effective intervention strategies.In the present study,we show that vascular endothelial cells are the primary cellular target of sorafenib-induced HFSR wherein soluble heparin-binding epidermal growth factor(s-HBEGF)mediates the crosstalk between vascular endothelial cells and keratinocytes.Mechanistically,s-HBEGF released from vascular endothelial cells activates the epidermal growth factor receptor(EGFR)on keratinocytes and promotes the phosphorylation of c-Jun N-terminal kinase 2(JNK2),which stabilizes sirtuin 1(SIRT1),an essential keratinization inducer,and ultimately gives rise to HFSR.The administration of s-HBEGF in vivo could sufficiently induce hyper-keratinization without sorafenib treatment.Furthermore,we report that HBEGF neutralization antibody,Sirtl knockdown,and a classic SIRTI inhibitor nicotinamide could all significantly reduce the sorafenib-induced HFSR in the mouse model.It is noteworthy that nicotinic acid,a prodrug of nicotinamide,could substantially reverse the sorafenib-induced HFSR in ten patients in a preliminary clinical study.Collectively,our findings reveal the mechanism of vascular endothelial cell-promoted keratinization in keratinocytes and provide a potentially promising therapeutic strategy for the treatment of sorafenib-induced HFSR.Peihua Luo Hao Yan Xueqin Chen Ying Zhang Ziying Zhao Ji Cao Yi Zhu Jiangxia Du Zhifei Xu Xiaochen Zhang Su Zeng Bo Yang Shenglin Ma Qiaojun He 2020Cell Research2020,30,9:5
16Effect of ^(60)Co-gamma radiation on the random walk error of interferometric fiber optic gyroscopes显示文摘Two ^(60)Co-gamma radiation experiments were launched to explore the radiation effect on optical components and interferometric fiber optic gyroscope (IFOG). In optical components radiation experiment, the result showed that polarization-maintaining (PM) fiber coil loss was the most affected parameter in all the RWC (random walk coefficient) related parameters, compared with the weak sensitivity of other components parameters. In the IFOG radiation experiment, the RWC performance degradation was found to be almost due to an increase of the PM fiber attenuation. Based on the experiment result, a RWC prediction model in radiation, which is obtained by embedding PM fiber loss expression into the RWC model, was built following a power law of dose and dose rate. An IFOG RWC in space radiation environment was predicted from radiation dose and dose rate by the RWC prediction model. This RWC value calculated from test data is fully accorded to the RWC value predicted from radiation dose.JIN Jing*, WANG XueQin, SONG NingFang & ZHANG ChunXi School of Instrument Science and Optic-electronics Engineering, Beihang University, Beijing 100191, China 2010Science China(Technological Sciences)2010,53,11:4
17第一代酪氨酸激酶抑制剂治疗中发生进展的非小细胞肺癌血浆表皮生长因子受体(EGFR)T790M突变提示了失败部位并预测了临床预后:一项前瞻性观察研究显示文摘背景与目的血浆循环肿瘤DNA(circulating tumor DNA,ctDNA)是检测表皮生长因子受体(epidermal growth factor receptor,EGFR)T790M突变的理想方法。T790M突变是第一代EGFR酪氨酸激酶抑制剂(tyrosine kinase inhibitor,TKI)耐药的主要机制。本研究旨在探讨ctDNA来源的T790M突变与非小细胞肺癌(non-small cell lung cancer,NSCLC)患者疾病失败部位及临床预后的关系。方法第一代TKI治疗发生进展的患者被分为局限胸内进展(chest limited,CF)、局限颅内进展(brain limited,BF)和其他部位进展(other,OF)组。采用扩增阻滞突变系统(amplification refractory mutation system,ARMS)和微滴式数字PCR(droplet digital PCR,ddPCR)对ctDNA中T790M突变进行了检测。采用Kaplan-Meier法分析了预后。结果 2种方法的总体一致性为78.3%。根据ARMS和ddPCR,OF组患者的T790M突变率明显高于BF组和CF组(P <0.001),OF组的T790M突变丰度也明显高于CF组和BF组(P <0.001)。AZD9291是T790M+患者最佳治疗选择,为EGFR-TKI治疗后进展的所有组中T790M+患者提供了最长的生存期;接受其他治疗的T790M-患者亚组的预后各不相同。结论本研究表明ctDNA中T790M突变与NSCLC患者EGFR-TKI治疗失败部位相关,失败部位和T790M突变状态对治疗选择和预后都有很大影响。Shirong Zhang Lucheng Zhu Bing Xia Enguo Chen Qiong Zhao Xiaochen Zhang Xueqin Chen Xufeng Chen Shenglin Ma 2018癌症2018,37,9:4
18Hypoxia-mimicking 3D bioglass-nanoclay scaffolds promote endogenous bone regeneration显示文摘Large bone defect repair requires biomaterials that promote angiogenesis and osteogenesis.In present work,a nanoclay(Laponite,XLS)-functionalized 3D bioglass(BG)scaffold with hypoxia mimicking property was prepared by foam replication coupled with UV photopolymerization methods.Our data revealed that the incorporation of XLS can significantly promote the mechanical property of the scaffold and the osteogenic differentiation of human adipose mesenchymal stem cells(ADSCs)compared to the properties of the neat BG scaffold.Desferoxamine,a hypoxia mimicking agent,encourages bone regeneration via activating hypoxia-inducible factor-1 alpha(HIF-1α)-mediated angiogenesis.GelMA-DFO immobilization onto BG-XLS scaffold achieved sustained DFO release and inhibited DFO degradation.Furthermore,in vitro data demonstrated increased HIF-1αand vascular endothelial growth factor(VEGF)expressions on human adipose mesenchymal stem cells(ADSCs).Moreover,BG-XLS/GelMA-DFO scaffolds also significantly promoted the osteogenic differentiation of ADSCs.Most importantly,our in vivo data indicated BG-XLS/GelMA-DFO scaffolds strongly increased bone healing in a critical-sized mouse cranial bone defect model.Therefore,we developed a novel BG-XLS/GelMA-DFO scaffold which can not only induce the expression of VEGF,but also promote osteogenic differentiation of ADSCs to promote endogenous bone regeneration.Xiao Zheng Xiaorong Zhang Yingting Wang Yangxi Liu Yining Pan Yijia Li Man Ji Xueqin Zhao Shengbin Huang Qingqing Yao 2021Bioactive Materials2021,6,10:4
19ALGORITHM AND IMPLEMENTATION OF AUTO-SEARCHING WELD LINE FOR WELDING MOBILE ROBOT显示文摘为焊接活动机器人的寻找汽车的焊接线的一个算法被介绍。寻找汽车的焊接线是机器人罐头自动地在焊接前根据焊接沟的特征认出一条焊接沟,然后以准备的需要的地位调整自己姿势因为也就是,焊接它是机器人独立地自己排列到焊接缝接的中心的一个过程。第一,与寻找汽车的焊接线的功能焊接活动机器人的配置被介绍,然后,算法和实现寻找 ofauto 焊接线根据机器人的 kinematics 模型被介绍,最后,轨道在寻找汽车的焊接线之中计划详细被调查。发达焊接活动机器人成功地装的实验结果 hows 在焊接前实现 auto-searchingweld 线的任务,追踪错误精确能被控制到近似± 1 .5 公里,并且满足实际焊接的要求工程。ZHANG Ke Lü Xueqin WU Yixiong L0U Songnian 2006Chinese Journal of Mechanical Engineering2006,19,2:4
20Arabidopsis Blue Light Receptor Phototropin 1 Undergoes Blue Light-Induced Activation in Membrane Microdomains显示文摘Phototropin (辐透) 调停了发信号由蓝光(BL ) 开始了在在植物在血浆膜(下午) 优化光合的轻俘获起一个关键作用。然而,响应 BL 在 PM 位于辐透活动的规定下面的机制仍然保持大部分不清楚。在这研究,由单个粒子的追踪和 phot1-GFP 蛋白质的逐步的 photobleaching 分析,我们在黑暗 phot1 表明了那 ? 蛋白质留在一个不活跃的状态并且主要作为单体存在。Dimerization 和 phot1-GFP 的散开率响应 BL 以一种剂量依赖者方式增加了。相反, BL 没影响 kinase 不活跃的 phot1 D806N -GFP?but 确实提高了它的 dimerization,建议那 phot1 dimerization 独立于 phosphorylation。F ? rster 回声精力转移荧光一生成像显微镜学 ? 分析表明在 phot1-GFP 和充满甾醇的类脂化合物环境的一个标记之间的相互作用, AtRem1.3-mCherry,与 BL 处理的增加的时间被提高。然而,这个 BL 依赖的相互作用不在植物共同表示是明显的 phot1 D806N -GFP 和 AtRem1.3-mCherry,显示那 BL 便于功能的 phot1-GFP 的 translocation 进标记 AtRem1.3 的 microdomains 激活调停辐透的发信号。相反地,甾醇弄空稀释了 phot1-GFP 动力学, dimerization,和 phosphorylation。一起拿,这些结果显示膜 microdomains 充当在 PM 组织为激活的 phot1 的合适的功能必要的平台。Yiqun Xue Jingjing Xing Yinglang Wan Xueqin Lv Lusheng Fan Yongdeng Zhang Kai Song Li Wang Xiaohua Wang Xin Deng Frantisek Baluska John M. Christie Jinxing Lin 2018Molecular Plant2018,11,6:4
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