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110篇 您的检索式:作者名="Zhigang Shi"
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1Suppression of tumorigenesis by human mesenchymal stem cells in a hepatoma model显示文摘人的间充质的干细胞(hMSCs ) 装家到肿瘤地点并且禁止肿瘤细胞的生长。很少对内在的分子的机制被知道连接 hMSCs 到肿瘤房间的指向的抑制。在这研究,我们从 hMSCs 用一个动物移植模型,一个合作文化系统和调节媒介在二根人的 hepatoma 房间线(H7402 和 HepG2 ) 上调查了 hMSCs 的效果。当 SCID 老鼠与 H7402 细胞和 Z3 hMSCs 的一个相等的数字被注射时,动物移植研究证明肿瘤形成的潜伏的时间被延长并且肿瘤尺寸更小。当 co 有教养时与 Z3 房间, H7402 细胞增殖减少了,增加的 apoptosis,和 Bcl-2 的表示, c-Myc,原子抗原(PCNA ) 和 survivin 低是的增殖的房间调整了。在有调节媒介的处理源于 Z3 hMSC 文化以后, H4702 房间出现了减少的形成殖民地的能力和减少的增长。Immunoblot 分析证明 beta-catenin, Bcl-2, c-Myc, PCNA 和 survivin 表示是在 H7402 和 HepG2 房间调整的 down。总起来说,我们的调查结果证明 hMSCs 禁止 H7402 和 HepG2 人的肝癌症房间线的恶意的显型,它包括增长,形成殖民地的能力和 oncogene 表示试管内和体内。而且,我们的研究提供表明小径的 Wnt 可以在调停 hMSC 的指向和肿瘤房间抑制有一个角色的证据。Ling Qiao Zhili Xu Tiejun Zhao Zhigang Zhao Mingxia Shi Robert C Zhao Lihong Ye Xiaodong Zhang 2008Cell Research2008,18,4:68
2Precise orbit determination of Beidou Satellites with precise positioning显示文摘Chinese Beidou satellite navigation system constellation currently consists of eight Beidou satellites and can provide preliminary service of navigation and positioning in the Asia-Pacific Region.Based on the self-developed software Position And Navigation Data Analysis(PANDA) and Beidou Experimental Tracking Stations (BETS),which are built by Wuhan University,the study of Beidou precise orbit determination,static precise point positioning (PPP),and high precision relative positioning,and differential positioning are carried out comprehensively.Results show that the radial precision of the Beidou satellite orbit determination is better than 10 centimeters.The RMS of static PPP can reach several centimeters to even millimeters for baseline relative positioning.The precision of kinematic pseudo-range differential positioning and RTK mode positioning are 2-4 m and 5-10 cm respectively,which are close to the level of GPS precise positioning.Research in this paper verifies that,with support of ground reference station network,Beidou satellite navigation system can provide precise positioning from several decimeters to meters in the wide area and several centimeters in the regional area.These promising results would be helpful for the implementation and applications of Beidou satellite navigation system.SHI Chuang ZHAO QiLe LI Min TANG WeiMing HU ZhiGang LOU YiDong ZHANG HongPing NIU XiaoJi LIU JingNan 2012Science China Earth Sciences2012,55,7:61
3Preliminary results pertaining to coseismic displacement and preseismic strain accumulation of the Lushan M_S7.0 earthquake,as reflected by GPS surveying显示文摘This paper presents the coseismic displacement and preseismic deformation fields of the Lushan MS7.0 earthquake that occurred on April 20,2013.The results are based on GPS observations along the Longmenshan fault and within its vicinity.The coseismic displacement and preseismic GPS results indicate that in the strain release of this earthquake,the thrust rupture is dominant and the laevorotation movement is secondary.Furthermore,we infer that any possible the rupture does not reach the earth’s surface,and the seismogenic fault is most likely one fault to the east of the Guanxian-Anxian fault.Some detailed results are obtainable.(1)The southern segment of the Longmenshan fault is locked preceding the Lushan earthquake.After the Wenchuan earthquake,the strain accumulation rate in the southeast direction accelerates in the epicenter of the Lushan earthquake,and the angle between the principal compressional strain and the seismogenic fault indicates that a sinistral deformation background in the direction of the seismogenic fault precedes the Lushan earthquake.Therefore,it is evident that the Wenchuan MS8.0 earthquake accelerated the pregnancy of the Lushan earthquake.(2)The coseismic displacements reflected by GPS data are mainly located in a region that is 230 km(NW direction)×100 km(SW direction),and coseismic displacements larger than 10 mm lie predominantly in a100-km region(NW direction).(3)On a large scale,the coseismic displacement shows thrust characteristics,but the associated values are remarkably small in the near field(within 70 km)of the earthquake fault.Meanwhile,the thrust movement in this70-km region does not correspond with the attenuation characteristics of the strain release,indicating that the rupture of this earthquake does not reach the earth’s surface.(4)The laevorotation movements are remarkable in the 50-km region,which is located in the hanging wall that is close to the earthquake fault,and the corresponding values in this case correlate with the attenuation characteristics of the strain release.WU YanQiang JIANG ZaiSen WANG Min CHE Shi LIAO Hua LI Qiang LI Peng YANG YongLin XIANG HePing SHAO ZhiGang WANG WuXing WEI WenXin LIU XiaoXia 2013Chinese Science Bulletin2013,58,28:33
4The principle of the positioning system based on communication satellites显示文摘It is a long dream to realize the communication and navigation functionality in a satellite system in the world. This paper introduces how to establish the system, a positioning system based on communication satellites called Chinese Area Positioning System (CAPS). Instead of the typical navigation satellites, the communication satellites are configured firstly to transfer navigation signals from ground stations, and can be used to obtain service of the positioning, velocity and time, and to achieve the function of navigation and positioning. Some key technique issues should be first solved; they include the accuracy position determination and orbit prediction of the communication satellites, the measur- ing and calculation of transfer time of the signals, the carrier frequency drift in communication satellite signal transfer, how to improve the geometrical configuration of the constellation in the system, and the integration of navigation & communication. Several innovative methods are developed to make the new system have full functions of navigation and communication. Based on the development of crucial techniques and methods, the CAPS demonstration system has been designed and developed. Four communication satellites in the geosynchronous orbit (GEO) located at 87.5°E, 110.5°E, 134°E, 142°E and barometric altimetry are used in the CAPS system. The GEO satellites located at 134°E and 142°E are decommissioned GEO (DGEO) satellites. C-band is used as the navigation band. Dual frequency at C1=4143.15 MHz and C2=3826.02 MHz as well as dual codes with standard code (CA code and precision code (P code)) are adopted. The ground segment consists of five ground stations; the master station is in Lintong, Xi’an. The ground stations take a lot of responsibilities, including monitor and management of the operation of all system components, determination of the satellite position and prediction of the satellite orbit, accomplishment of the virtual atomic clock measurement, transmission and receiving navigation signals to and from each satellite. In the north, the south, the east, the west and the center of Chinese main land, the function of CAPS demonstration system is checked and measured. In cars and on board the system is also checked and measured. The results are as follow: CA-code, horizontal positioning accuracy, 15-25 m (1σ), vertical, 1-3 m; P-code, horizontal positioning accuracy, 8-10 m (1σ), vertical, 1-3 m; velocity accuracy, CA-code, 0.13-0.30 m/s, P-code, 0.15-0.17 m/s; time accuracy, CA-code, 160 ns, P-code, 13 ns; determination accuracy of orbit ≤2 m. About 20 million US $ and two years are spent for the development of demonstration. A complete CAPS system is now being established.AI GuoXiang SHI HuLi WU HaiTao LI ZhiGang GUO Ji 2009Science China(Physics,Mechanics & Astronomy)2009,52,3:21
5Low-frequency E-field Detection Array(LFEDA)-Construction and preliminary results显示文摘In recent years, locating total lightning at the VLF/LF band has become one of the most important directions in lightning detection. The Low-frequency E-field Detection Array(LFEDA) consisting of nine fast antennas was developed by the Chinese Academy of Meteorological Sciences in Guangzhou between 2014 and 2015. This paper documents the composition of the LFEDA and a lightning-locating algorithm that applies to the low-frequency electric field radiated by lightning pulse discharge events(LPDEs). Theoretical simulation and objective assessment of the accuracy and detection efficiency of LFEDA have been done using Monte Carlo simulation and artificial triggered lightning experiment, respectively. The former results show that having a station in the network with a comparatively long baseline improves both the horizontal location accuracy in the direction perpendicular to the baseline and the vertical location accuracy along the baseline. The latter results show that detection efficiencies for triggered lightning flashes and return strokes are 100% and 95%, respectively. The average planar location error for return strokes of triggered lightning flashes is 102 m. By locating LPDEs in thunderstorms, we find that LPDEs are consistent with convective regions as indicated by strong reflectivity columns, and present a reasonable distribution in the vertical direction.In addition, the LFEDA can reveal an image of lightning development through mapping the channels of lightning. Based on three-dimensional locations, the vertical propagation speed of the preliminary breakdown and the changing trend of the leader's speed in an intra-cloud and a cloud-to-ground flash are investigated. The research results show that the LFEDA has the capability for three-dimensional location of lightning, which provides a new technique for researching lightning development characteristics and thunderstorm electricity.SHI DongDong ZHENG Dong ZHANG Yang ZHANG YiJun HUANG ZhiGang LU WeiTao CHEN ShaoDong YAN Xu 2017Science China Earth Sciences2017,60,10:10
6Methods of rapid orbit forecasting after maneuvers for geostationary satellites显示文摘A geostationary(GEO) satellite may serve as a navigation satellite,but there is a problem that maneuvers frequently occur and the forces are difficult to model.Based on the technique of determining satellite orbits by transfer,a predicted orbit with high accuracy may be achieved by the method of statis-tical orbit determination in case of no maneuver force.The predicted orbit will soon be invalid after the maneuver starts,and it takes a long time to get a valid orbit after the maneuver ends.In order to improve ephemeris usability,the method of rapid orbit forecasting after maneuvers is studied.First,GEO satellite movement is analyzed in case of maneuvers based on the observation from the orbit meas-urement system by transfer.Then when a GEO satellite is in the free status just after maneuvers,the short arc observation is used to forecast the orbit.It is assumed that the common system bias and biases of each station are constant,which can be obtained from orbit determination with long arc observations.In this way,only 6 orbit elements would be solved by the method of statistical orbit determination,and the ephemeris with high accuracy may be soon obtained.Actual orbit forecasting with short arc observation for SINOSAT-1 satellite shows that,with the tracking network available,the precision of the predicted orbit(RMS of O-C) can reach about 5 m with 15 min arc observation,and about 3 m with 30 min arc observation.YANG XuHai LI ZhiGang FENG ChuGang GUO Ji SHI HuLi AI GuoXiang WU FengLei QIAO RongChuan 2009Science China(Physics,Mechanics & Astronomy)2009,52,3:10
7Genome-wide Dissection of Co-selected UV-B Responsive Pathways in the UV-B Adaptation of Qingke显示文摘Qingke (Tibetan hulless barley) has long been cultivated and exposed to long-term and strong UV-B radiation on the Tibetan Plateau, which renders it an ideal species for elucidating novel UV-B responsive mechanisms in plants. Here we report a comprehensive metabolite profiling and metabolite-based genome-wide association study (mGWAS) using 196 diverse qingke and barley accessions. Our results demonstrated both constitutive and induced accumulation, and common genetic regulation, of metabolites from different branches of the phenylpropanoid pathway that are involved in UV-B protection. A total of 90 significant mGWAS loci for these metabolites were identified in barley-qingke differentiation regions, and a number of high-level metabolite trait alleles were found to be significantly enriched in qingke, suggesting co-selection of various phenylpropanoids. Upon dissecting the entire phenylpropanoid pathway, we identified some key determinants controlling natural variation of phenylpropanoid content, including three novel proteins, a flavone C-pentosyltransferase, a tyramine hydroxycinnamoyl acyltransferase, and a MYB transcription factor. Our study, furthermore, demonstrated co-selection of both constitutive and induced phenylpropanoids for UV-B protection in qingke.Xingquan Zeng Hongjun Yuan Xuekui Dong Meng Peng Xinyu Jing Qijun Xu Tang Tang Yulin Wang Sang Zha Meng Gao Congzhi Li Chujin Shu Zexiu Wei Wangmu Qimei Yuzhen Basang Jiabu Dunzhu Zeqing Li Lijun Bai Jian Shi Zhigang Zheng Sibin Yu Alisdair R.Fernie Jie Luo Tashi Nyima 2020Molecular Plant2020,13,1:9
8Stability and remote real-time monitoring of the slope slide body in the Luoshan mining area显示文摘Landslides have occurred frequently in the Luoshan mining area because of disordered mining.This paper discusses the landforms and physiognomy,hydro-meteorology,formation lithology,and geologic structure of the Luoshan mining area.It also describes the factors influencing the slope stability of landslide No.Ⅲ,determines the general parameters and typical section plane,analyzes the stress-strain state of the No.Ⅲ slope,and calculates its safety factors with FLAC3 D under saturated and natural conditions.Based on a stability analysis,a remote real-time monitoring system was applied to the No.Ⅲ slope,and these monitoring data were collected and analyzed.Yang Xiaojie Hou Dinggui Tao Zhigang Peng Yanyan Shi Haiyang 2015International Journal of Mining Science and Technology2015,25,5:6
9Characteristics of the Seismic Waves from a New Active Source Based on Methane Gaseous Detonation显示文摘Active seismic sources are critical for obtaining high resolution images of the subsurface.For active imaging in urban areas,environment friendly and green seismic sources are required.In present work,we introduce a new type of green active source based on the gaseous detonation of methane and oxygen.When fired in a closed container,the chemical reaction,i.e.gaseous detonation,will produce high pressure air over 150 MPa.Seismic waves are produced when high pressure air is quickly released to impact the surroundings.The first field experiment of this active source was carried out in December,2017 in Jingdezhen,Jiangxi Province,where a series of active sources were excited to explore their potential in mine exploration.In current work,we analyzed the seismic waves recorded by near-field accelerators and a dense short-period seismic array and compared them with those from a mobile airgun source,another kind of active source by releasing high pressure air into water.The results demonstrate that it can be used for high resolution near surface imaging.Firstly,the gaseous detonation productions are harmless CO2 and water,making it a green explosive source.Secondly,the dominant seismic frequencies are 10-80 Hz and a single shot can be recorded up to 15 km,making it suitable for local structure investigations.Thirdly,it can be excited in vertical wells,similar to traditional powder explosive sources.It can also act as an additional on-land active source to airgun sources,which requires a suitable water body as intermediate media to generate repeating signals.Moreover,the short duration and high frequency signature of the source signals make it safe with no damage to nearby buildings.These make it convenient to excite in urban areas.As a new explosive source,the excitation equipment and conditions,such as gas ratio,sink depth and air-releasing directions,need further investigation to improve seismic wave generation efficiency.WANG Weitao WANG Xiang MENG Chuanmin DONG Shi WANG Zhigang XIE Junju WANG Baoshan YANG Wei XU Shanhui WANG Tao 2019Earthquake Research in China2019,33,2:6
10A review on transesterification of propylene carbonate and methanol for dimethyl carbonate synthesis显示文摘Dimethyl carbonate(DMC)is widely applied in various fields according to its outstanding physico-chemical properties,especially as a solvent in electrolyte of lithium-ion batteries.More than 90%DMC in China is industrially produced from the propylene carbonate(PC)and methanol(MeOH)route because it is an environmentally friendly and highly efficient process.This review summarizes different DMC production technologies,homogeneous and heterogeneous catalysts,catalytic mechanisms,reaction kinetics and engineering,with particular focus on the relationship between catalyst preparation and catalytic performances.The advantages and disadvantages of various catalysts are categorically compared.Homogeneous catalysts are highly efficient but prone to deactivate and are difficult to separate.Heterogeneous catalysts are easy to separate and have the promising future in industrial application,but their low catalytic efficiency is still the critical bottleneck.From process aspect,the catalytic distillation technology would be promising to overcome the efficiency problem of solid catalysts.Wenjie Deng Lei Shi Jie Yao Zhigang Zhang 2019Carbon Resources Conversion2019,2,3:6
11Senegenin promotes in vitro proliferation of human neural progenitor cells显示文摘Senegenin,an effective component of Polygala tenuifolia root extract,promotes proliferation and differentiation of neural progenitor cells in the hippocampus.However,the effects of senegenin on mesencephalon-derived neural progenitor cells remain poorly understood.Cells from a ventral mesencephalon neural progenitor cell line(ReNcell VM) were utilized as models for pharmaceutical screening.The effects of various senegenin concentrations on cell proliferation were analyzed,demonstrating that high senegenin concentrations(5,10,50,and 100 μmo/L),particularly 50 μmol/L,significantly promoted proliferation of ReNcell VM cells.In the mitogen-activated protein kinase signal transduction pathway,senegenin significantly increased phosphorylation levels of extracellular signal-regulated kinases.Moreover,cell proliferation was suppressed by extracellular signal-regulated kinase inhibitors.Results suggested that senegenin contributed to in vitro proliferation of human neural progenitor cells by upregulating phosphorylation of extracellular signal-regulated kinase.Shi, Fang Liang, Zhigang Guo, Zixuan Li, Ran Yu, Fen Zhang, Zhanjun Wang, Xuan Wang, Xiaomin 2011Neural Regeneration Research2011,6,3:5
12Serum DKK1 as a protein biomarker for the diagnosis of hepatocellular carcinoma: a large-scale, multicentre study显示文摘Qiujin Shen Jia Fan Xin-Rong Yang Yexiong Tan Weifeng Zhao Yang Xu Ning Wang Yongdong Niu Zheng Wu Jian Zhou Shuang-Jian Qiu Ying-Hong Shi Bin Yu Ning Tang Wei Chu Min Wang Jinhua Wu Zhigang Zhang Shengli Yang Jianren Gu Hongyang Wang Wenxin Qin 2012Lancet Oncology2012,,8:4
13Qualitative and quantitative assessment of related substances in the Compound Ketoconazole and Clobetasol Propionate Cream by HPLC-TOF-MS and HPLC显示文摘Related substances in pharmaceutical formulations are associated with their safety, efficacy and stability. However, there is no overall study already published on the assessment of related substances in the Compound Ketoconazole and Clobetasol Propionate Cream. In this work, a reliable HPLC-TOF-MS qualitative method was developed for the analysis of related substances in this preparation with a quick and easy extraction procedure. Besides the active pharmaceutical ingredients, two compounds named ketoconazole impurity B′ optical isomer and ketoconazole impurity E were identified. Furthermore, a new HPLC method for qualitative and quantitative assessment on related substances and degradation products, which were found in the stability test, was established and validated. The single standard to determine multi-components method was applied in the quantitative analysis, which was an effective way for reducing cost and improving accuracy. This study can provide a creative idea for routine analysis of quality control of the Compound Ketoconazole and Clobetasol Propionate Cream.Wenling Yang Xiaomei Yang Fanghua Shi Zhigang Liao Yongkun Liang Liangzhong Yu Ruixun Wang Qing Li Kaishun Bi 2019Journal of Pharmaceutical Analysis2019,9,3:4
14Four-year dynamic observation and study on standardized management of elderly patients with type 2 diabetes in Beijing Yongding Road Community显示文摘Purpose:This study aimed to understand the joint standard of blood glucose,blood li-pids,and blood pressure in elderly patients>60 years of age with type 2 diabetes in the Beijing Yongding Road Community.Methods:One hundred ninety-two elderly patients>60 years of age who were diagnosed with type 2 diabetes in Yongding Road Community served as the investigation subjects,under-went standard management,and the dynamic changes in blood glucose,blood lipids,and blood pressure were monitored for 48 months.Results:At the end of the observation period,the standard rates of fasting blood glucose and postprandial blood glucose were 72.55%and 80.00%,respectively,which were increased compared with 55.73%and 56.08%at baseline(P<0.01).The standard rate of HbA1c was 59.81%,which was increased compared with 53.44%at baseline(P>0.05).The standard rates of TG and LDL-C were 76.71%and 60.38%,respectively,which were increased compared with 54.69%and 34.74%at base-line,and the standard rate of HDL-C was 13.64%,which was decreased compared with 40.10%at baseline(P<0.01).The standard rate of BP was 58.33%,which was increased compared with 38.54%at baseline(P<0.01).The optimal control rate of blood glucose for 48 months(the standard times of the total measurement times in 48 months≥75%)was higher;the fasting blood glucose was 52.17%,the 2-h postprandial blood glucose was 60.22%,and the HbA1c was 46.45%.The optimal control rate of blood lipids was lower;LDL-C was 17.49%and HDL-C was 13.59%.The optimal control rate of BP was 9.13%.At the end of the observation period,the levels of fasting blood glucose and postprandial blood glucose were decreased by 0.7 mmol/L and 1.48 mmol/L,respectively,compared with the base-line(P<0.01).The level of HbA1c was decreased by 0.18%compared with the baseline(P<0.05).The levels of LDL-C and HDL-C were decreased by 0.4 mmol/L and 0.23 mmol/L,respectively,compared with the baseline(P<0.01).The levels of SBP and DBP were decreased by 4 mmHg compared with the baseline(P<0.01).At the end of the observation period,the joint standard rate of the three indices of HbA1c,LDL-C,and BP was 24.72%,which was increased compared with 6.25%at baseline(P<0.01).Conclusion:Standardized management of elderly patients with diabetes in the Community can improve the joint standard rate of blood glucose,blood lipids,and blood pressure.The op-timal control rate and joint standard rate are the important indices for evaluating the quality of diabetes management.Yue Li Dongyun Shen Wei Zhang Yimin Wang Hongmei Li Jie Geng Liying Yang Zhijun Xiao Yan Liu Zhigang Feng Linying Cao Yan Jin Lixia Shi 2014Family Medicine and Community Health2014,2,2:4
15CPPU may induce gibberellin-independent parthenocarpy associated with PbRR9 in‘Dangshansu’pear显示文摘Parthenocarpy is a valuable trait in self-incompatible plants,such as pear.N-(2-chloro-4-pyridyl)-N’-phenylurea(CPPU),a synthetic cytokinin analog,can induce parthenocarpy in pear(Pyrus spp.),but the mechanism of induction is unclear.To investigate the role of gibberellin in CPPU-induced parthenocarpy in pear,CPPU supplemented with paclobutrazol(PAC)was sprayed onto‘Dangshansu’pear.We found that the fruit set rate of pear treated with CPPU supplemented with PAC was identical to that in a CPPU-alone treatment group.In regard to cell development,CPPU mainly promoted hypanthium cell division and expansion,and PAC application had no influence on CPPU-induced cell development.RNA sequencing revealed that gibberellin 20 oxidase and gibberellin 3 oxidase genes were not differentially expressed following CPPU treatment.According to the analysis of fruit phytohormone content,the CPPU treatments did not induce gibberellin biosynthesis.These results suggest that CPPU-induced parthenocarpy may be gibberellin independent in‘Dangshansu’pear.After CPPU treatment,the indole acetic acid(IAA)content in fruit was significantly increased,and the abscisic acid(ABA)content was significantly decreased.Similarly,RNA sequencing revealed that many genes involved in the auxin and ABA pathways were significantly differentially expressed in the CPPU treatment groups;among them,indole-3-pyruvate monooxygenase(YUCCA)was significantly upregulated and 9-cis-epoxycarotenoid dioxygenase(NCED)was significantly downregulated.IAA and ABA may thus play important roles in CPPU-induced parthenocarpy.PbTwo-component response regulator9(PbRR9),PbYUCCA4,and PbNCED6 were then selected to further elucidate the mechanism of CPPU-induced parthenocarpy.A yeast one-hybrid assay indicated that PbRR9 can combine with the PbYUCCA4 and PbNCED6 promoters.Dual luciferase assays revealed that PbRR9 can promote and repress the activities of the PbYUCCA4 and PbNCED6 promoters,respectively.After the transient expression of PbRR9 in fruits,PbYUCCA4 expression was significantly upregulated,and PbNCED6 expression was significantly downregulated.This study uncovered a CPPU-induced parthenocarpy mechanism that is different from that in tomato.CPPU may upregulate PbYUCCA4 and downregulate PbNCED6 by upregulating PbRR9,thereby increasing IAA content and decreasing ABA content to ultimately induce parthenocarpy in‘Dangshansu’pear.However,because only a single time point was used and because‘botanical’and‘accessory’fruits have different structures,this conclusion is still preliminary.Liu Cong Ting Wu Hanting Liu Huibin Wang Haiqi Zhang Guangping Zhao Yao Wen Qianrong Shi Lingfei Xu Zhigang Wang 2020Horticulture Research2020,7,1:4
16Materials Experiment on Tiangong-2 Space Laboratory显示文摘During the China's Tiangong-2(TG-2) flight mission, the experiments of 18 kinds of material samples were conducted in space by using a Multiple Materials Processing Furnace(MMPF) mounted in the orbital module of the TG-2 space laboratory. After the experiments of 12 kinds of samples of the first and second batches were completed successfully, astronauts packed and brought them back to the ground by ShenzhouII spacecraft. By studying processing and formation on semiconductor and optoelectronics materials, metal alloys and metastable materials, functional single-crystal, micro-and nano-composite materials encapsulated in sample ampoules both in space and on Earth, we expect to explore some physical and chemical processes and mechanism of the materials formation that are normally obscured and therefore are difficult to study quantitatively on the ground due to the gravity-induced convection, to obtain the processing and synthesis technology for preparing high quality materials, and lead to the improvement and development of materials processing techniques on Earth, and also develop the experiment device and comprehensive ability for materials experiment in microgravity environment. This report briefly introduces the main points of each research work and preliminary comparative analysis results of 12 samples carried out by scientists undertaking research task.LI Xiangyang LU Ye MENG Xiangjian WANG Jianlu WANG Reng CHEN Lidong HUA Zile LI Xiaoya SHI Jianlin LIU Jinfeng XU Guisheng WEI Bingbo XIE Wenjun YIN Zhigang ZHANG Xingwang JIANG Hongxiang LI Hong LUO Xinghong ZHANG Haifeng ZHAO Jiuzhou WANG Binbin PAN Mingxiang 2018空间科学学报2018,38,5:4
17A modified HLA-A^(*)0201-restricted CTL epitope from human oncoprotein (hPEBP4) induces more efficient antitumor responses显示文摘We previously identified human phosphatidylethanolamine-binding protein 4(hPEBP4)as an antiapoptotic protein with increased expression levels in breast,ovarian and prostate cancer cells,but low expression levels in normal tissues,which makes hPEBP4 an attractive target for immunotherapy.Here,we developed hPEBP4-derived immunogenic peptides for inducing antigen-specific cytotoxic T lymphocytes(CTLs)targeting breast cancer.A panel of hPEBP4-derived peptides predicted by peptide-MHC-binding algorithms was evaluated to characterize their HLAA2.1 affinity and immunogenicity.We identified a novel immunogenic peptide,P40–48(TLFCQGLEV),that was capable of eliciting specific CTL responses in HLA-A2.1/K^(b) transgenic mice,as well as in peripheral blood lymphocytes from breast cancer patients.Furthermore,amino-acid substitutions in the P40–48 sequence improved its immunogenicity against hPEBP4,a self-antigen,thus circumventing tolerance.We designed peptide analogs by preferred auxiliary HLA-A^(*)0201 anchor residue replacement,which induced CTLs that were crossreactive to the native peptide.Several analogs were able to stably bind to HLA-A^(*)0201 and elicit specific CTL responses better than the native sequence.Importantly,adoptive transfer of CTLs induced by vaccination with two analogs more effectively inhibited tumor growth than the native peptide.These data indicate that peptide analogs with high immunogenicity represent promising candidates for peptide-mediated therapeutic cancer vaccines.Weihong Sun Junyi Shi Jian Wu Junchu Zhang Huabiao Chen Yuanyuan Li Shuxun Liu Yanfeng Wu Zhigang Tian Xuetao Cao Nan Li 2018Cellular & Molecular Immunology2018,15,8:4
18Do Nutrition and Health Affect Migrant Workers' Incomes?Some Evidence from Beijing,China显示文摘候鸟工人在中国城市里成为了劳动力量的一个主要元素,当形成一个社会上处于不利地位的组时,做对经济的重要贡献。关于在在中国的营养和健康和收入的水平之间的关系的存在研究主要集中于住在农村区域的农民。在北京基于一个食物绞碎机方程并且用调查,这篇论文检验在候鸟工人的营养和健康层次和他们的每月的收入之间的关系。当时,我们发现营养吸入和身体团索引在收入上有积极效果病和每日的工作小时的持续时间有否定效果。这些结论暗示中国政府应该把更多的强调放在改进候鸟工人的健康上,包括提供营养和健康上的教育程序,并且提高医药保险和老年保险系统。Shi Zheng Zhigang Wang Holly Wang Shunfeng Song 2010China & World Economy2010,18,5:4
19Albumin-bound paclitaxel dimeric prodrug nanoparticles with tumor Qr redox heterogeneity-triggered drug release for synergistic photothermal/ chemotherapy显示文摘In spired by the clinically approved albumin based PTX formulatio n(Abraxa ne)and high-drug-loading dimeric prodrug tactics,herein we report a theranostic HAbraxane-likeH prodrug formulation,which is comprised of human serum albumin(HSA),a paclitaxel(PTX)dimer bridged with thioether liner(PTX2-S),and photosensitizer IR780 iodide.Nanoparticles(NPs)with PTX2-S and IR780 as the core and HSA as the stealth shell are formed.Compared with HSA-based PTX clinical formulation(Abraxane),the dimeric molecules not only constitute the bulk structure of the particles,but also act as crossi ng age nt,thus realizing drug loadi ng content in creasi ng from 6.6 wt.%to 48.7 wt.%with high loadi ng efficie ncy(>90%)and excellent stability in biological conditions.Importa ntly,the thioether lin kage dually resp onds to the tumor redox heteroge neity and the NPs gradually releases the pare nt drug PTX for chemotherapy.Mea nwhile,PTX2-S facilitates the en capsulatio n of IR780 iodide due to their π-π stacki ng interaction and IR780 iodide gen erates spatio-temporal hyperthermia un der light irradiation to kill cancer cells for photothermal therapy.The described craft integrates the biomimetic trait of HSA,high drug loading,tumor redox heterogeneity-initiated on-dema nd drug release,and combi nation therapy into one formulati on and the developed nan oparticles are promising for cancer treatment.Qing Pei Xiuli Hu Xiaohua Zheng Rui Xia Shi Liu Zhigang Xie Xiabin Jing 2019Nano Research2019,12,4:3
20Adhesive anastomosis for organ transplantation显示文摘The recent development of tough tissue adhesives has stimulated intense interests among material scientists and medical doctors.However,these adhesives have seldom been tested in clinically demanding surgeries.Here we demonstrate adhesive anastomosis in organ transplantation.Anastomosis is commonly conducted by dense sutures and takes a long time,during which all the vessels are occluded.Prolonged occlusion may damage organs and even cause death.We formulate a tough,biocompatible,bioabsorbable adhesive that can sustain tissue tension and pressurized flow.We expose the endothelial surface of vessels onto a gasket,press two endothelial surfaces to the adhesive using a pair of magnetic rings,and reopen the bloodstream immediately.The time for adhesive anastomosis is shortened compared to the time for sutured anastomosis.We have achieved adhesive anastomosis of a great vein in transplanting the liver of a pig.After the surgery,the adhesive is absorbed,the vein heals,and the pig lives for over one month.Kang Liu Hang Yang Gaobo Huang Aihua Shi Qiang Lu Shanpei Wang Wei Qiao Haohua Wang Mengyun Ke Hongfan Ding Tao Li Yanchao Zhang Jiawei Yu Bingyi Ren Rongfeng Wang Kailing Wang Hui Feng Zhigang Suo Jingda Tang Yi Lv 2022Bioactive Materials2022,7,7:3
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