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127篇 您的检索式:作者名="Xia Chi"
    题名 作者 年代 出处 被引量
1The characteristics of CO_2 assimilation of photosynthesis and chlorophyll fluorescence in transgenic PEPC rice显示文摘With PEPC, PPDK, NADP-ME and PEPC+ PPDK transgenic and untransformed rice (Orysa sativa L.), the activities of related C4 photosynthesis enzymes, the chlorophyll fluorescence parameters, CO2 exchange and other physiological indexes were compared, in which the physiological characteristics of PEPC transgenic rice were mainly studied. The results were as follows: (i) The activities of PEPC in PEPC transgenic rice were 20-fold higher than those in untransformed rice; the light-saturation photosynthetic rates and the carboxylation efficiency of PEPC transgenic rice were increased by 55% and 50% more than those of untransformed rice, respectively, while the CO2 compensation point decreased by 27%. (ii) The PS II photochemical efficiency (Fv/Fm) and photochemical quenching (qp) of transgenic PEPC rice decreased less in comparison with those of untransformed rice after the treatment with high light intensity (3 h) or methyl viologen (MV), a photooxidative reagent, which demonstrated that the tolerance of PEPCJIAO Demao, LI Xia, HUANG Xueqing, CHI Wei, KUANG Tingyun & Ku SB Maurice1. Institute of Agrobiological Genetics and Physiology, Jiangsu Academy of Agricultural Sciences, Nangjing 210014, China 2. Institute of Botany, the Chinese Academy of Sciences, Beijing 100093, China 3. Botany Department, Washington State University, Pullman, WA 99164-4236, USA 2001Chinese Science Bulletin2001,46,13:29
2The Chrysanthemum nankingense Genome Provides Insights into the Evolution and Diversification of Chrysanthemum Flowers and Medicinal Traits显示文摘The Asteraceae (Compositae),a large plant family of approximately 24 000-35 000 species,accounts for^10% of all angiosperm species and contributes a lot to plant diversity.The most representative members of the Asteraceae are the economically important chrysanthemums (Chrysanthemum L.)that diversified through reticulate evolution.Biodiversity is typically created by multiple evolutionary mechanisms such as wholegenome duplication 0NGD)or polyploidization and locally repetitive genome expansion.However,the lack of genomic data from chrysanthemum species has prevented an in-depth analysis of the evolutionary mechanisms involved in their diversification.Here,we used Oxford Nanopore long-read technologyto sequence the diploid Chrysanthemum nankingense genome,which represents one of the progenitor genomes of domesticated chrysanthemums.Our analysis revealed that the evolution of the C.nankingense genome was driven by bursts of repetitive element expansion and WGD events including a recentWGD that distinguishes chrysanthemum from sunflower,which diverged from chrysanthemum approximately 38.8 million years ago.Variations of ornamental and medicinal traits in chrysanthemums are linked to the expansion of candidate gene families by duplication events including paralogous gene duplication.Collectively,our study of the assembled reference genome offers new knowledge and resources to dissect the history and pattern of evolution and diversification of chrysanthemum plants,and also to accelerate their breeding and improvement.Chi Song Yifei Liu Aiping Song Gangqiang Dong Hongbo Zhao Wei Sun Shyam Ramakrishnan Ying Wang Shuaibin Wang Tingzhao Li Yan Niu Jiafu Jiang Bin Dong Ye Xia Sumei Chen Zhigang Hu Fadi Chen Shilin Chen 2018Molecular Plant2018,11,12:24
3Over-expression of NYGGF4 inhibits glucose transport in 3T3-L1 adipocytes via attenuated phosphorylation of IRS-1 and Akt显示文摘Chun-mei ZHANG Xiao-hui CHEN Bin WANG Feng LIU Xia CHI Mei-ling TONG Yu-hui NI Rong-hua CHEN Xi-rong GUO 2009Acta Pharmacologica Sinica2009,30,1:17
4Flame retardant polyamide 6 by in situ polymerization of ε-caprolactam in the presence of melamine derivatives显示文摘An improved method for preparing melamine cyanurate (MCA) based flame retardant polyamide 6 (FRPA6) materials has been proposed. This processing method, i.e., improved in situ polymerization, was used to synthesize flame retardant PA6. In situ formed MCA nanoparticles were supposed to be linked to PA6 chains in the e-caprolactam hydrolytic polymerization system to obtain star- type polymers for the first time. Through TEM photographs, it can be found that the in situ formed MCA nanoparticles with diametric size of less than 50 nm, are nanoscaled, highly uniformly dispersed in the PA6 matrix. Synthesized ?ame retardant PA6 have good fire performance which can achieve UL-94 V-0 rating at 1.6 mm thickness with the presence of 7.34 wt.% MCA in the matrix.Zhi Yong Wu Wei Xu Jin Kui Xia Yao Chi Liu Qian Xin Wu Wei Jian Xu 2008Chinese Chemical Letters2008,19,2:15
5Prostate cancer in Asia:A collaborative report显示文摘The incidence of prostate cancer(PCa)within Asian population used to be much lower than in the Western population;however,in recent years the incidence and mortality rate of PCa in some Asian countries have grown rapidly.This collaborative report summarized the latest epidemiology information,risk factors,and racial differences in PCa diagnosis,current status and new trends in surgery management and novel agents for castration-resistant prostate cancer.We believe such information would be helpful in clinical decision making for urologists and oncologists,health-care ministries and medical researchers.Rui Chen Shancheng Ren Ming Kwong Yiu Ng Chi Fai Wai Sam Cheng Lap Hong Ian Seiji Naito Tadashi Matsuda Elijah Kehinde Ali Kural Jason Yichun Chiu Rainy Umbas Qiang Wei Xiaolei Shi Liqun Zhou Jian Huang Yiran Huang Liping Xie Lulin Ma Changjun Yin Danfeng Xu Kexin Xu Zhangqun Ye Chunxiao Liu Dingwei Ye Xin Gao Qiang Fu Jianquan Hou Jianlin Yuan Dalin He Tiejun Pan Qiang Ding Fengshuo Jin Benkang Shi Gongxian Wang Xiuheng Liu Dongwen Wang Zhoujun Shen Xiangbo Kong Wanhai Xu Yaoliang Deng Haibo Xia Alexa NCohen Xu Gao Chuanliang Xu Yinghao Sun 2014Asian Journal of Urology2014,1,1:13
6Downregulation of STEAP4, a highly-expressed TNF-α-inducible gene in adipose tissue, is associated with obesity in humans显示文摘Chunsmei ZHANG Xia CHI Bin WANG Min ZHANG Yu-hui NI Rong-hua CHEN Xiao-nan LI Xi-rong GUO 2008Acta Pharmacologica Sinica2008,29,5:11
7In vitro corrosion resistance of a Ta2O5 nanofilm on MAO coated magnesium alloy AZ31 by atomic layer deposition显示文摘Micro-arc oxidation(MAO)coating with outstanding adhesion strength to Mg alloys has attracted more and more attention.However,owing to the porous structure,aggressive ions easily invaded the MAO/substrate interface through the through pores,limiting long-term corrosion resistance.Therefore,a dense and biocompatible tantalum oxide(Ta2O5)nanofilm was deposited on MAO coated Mg alloy AZ31 through atomic layer deposition(ALD)technique to seal the micropores and regulate the degradation rate.Surface micrography,chemical compositions and crystallographic structure were characterized using FE-SEM,EDS,XPS and XRD.The corrosion resistance of all samples was evaluated through electrochemical and hydrogen evolution tests.Results revealed that the Ta2O5 film mainly existed in the form of amorphousness.Moreover,uniform deposition of Ta2O5 film and effective sealing of micropores and microcracks in MAO coating were achieved.The current density(icorr)of the composite coating decreased three orders of magnitude than that of the substrate and MAO coating,improving corrosion resistance.Besides,the formation and corrosion resistance mechanisms of the composite coating were proposed.Chang-Yang Li Chi Yu Rong-Chang Zeng Bo-Cheng Zhang Lan-Yue Cui Jun Wan Yang Xia 2020Bioactive Materials2020,5,1:11
8Hepatitis C virus core protein triggers expansion and activation of CD4+CD25+ regulatory T cells in chronic hepatitis C patients显示文摘Naicui Zhai Xiumei Chi Tianyang Li Hongxiao Song Haijun Li Xia Jin Ian Nicholas Crispe Lishan Su Junqi Niu Zhengkun Tu 2015Cellular & Molecular Immunology2015,12,6:10
9Impacts of nitrogen and zeolite managements on yield and physicochemical properties of rice grain显示文摘Zeolite(Z)can hold soil water and nutrient to obtain a higher yield on introduction into moist soil.However,the effects of Z and nitrogen(N)managements on rice grain quality is unclear.Therefore,the effects of different amounts of Z(Z0:0 t/hm^(2);Z0.9 and Z0.22:10 t/hm^(2)in different particle sizes of 0.45-0.9 mm and 0.17-0.22 mm in diameter)and N(N0,N52.5,N105,N157.5:0 kg/hm^(2),52.5 kg/hm^(2),105 kg/hm^(2),157.5 kg/hm^(2)),and Z(Z0,Z10:0 t/hm^(2),10 t/hm^(2))and application frequencies of N on rice yield and grain quality were investigated in 2014 and 2015 in Northeast coastal region of China where Z10 was extended to use in large areas.Results showed that both N and Z applications significantly increased the yields of rough rice(RRY),brown rice,milled rice and head rice.However,there was no significant difference between Z0.9 and Z0.22.The chalkiness area,length-width ratio and head rice rate were not influenced by Z and N applications.However,Z application significantly decreased the chalk rate and slightly increased amylose content(AC)but mattered little to taste value(TV)of rice and rice cooking quality.N could significantly increase rice protein content(PC)but lessen the TV and breakdown value;the order of influence degree on rice yield increasing was as follows:CRF2(third-split fertilization with Z10),CRF1(basal fertilization one time with Z10),U2(urea:third-split fertilization without Z)and U1(basal fertilization one time without Z).Both CRF1 and CRF2 greatly enhanced the RRY.However,CRF1 was recommended for clear decrease in labor and fuel for growers.Compared with treatments of U1 and CRF1,CRF2 and U2 significantly decreased the AC.PC exhibited significant negative relation to TV and greatly determined the rice eating quality and cooking quality.Wu Qi Xia Guimin Chen Taotao Chi Daocai Jin Ye Sun Dehuan 2016International Journal of Agricultural and Biological Engineering2016,9,5:10
10Gender differences in efficacy of primary percutaneous coronary intervention in patients with ST-elevation myocardial infarction显示文摘背景经皮的冠的干预(一种总线标准)的临床的结果在学习在在病人在主要一种总线标准的策略上把性差别的影响与尖锐圣片断举起作比较瞄准了的 men.This 比那在女人是更差的心肌的梗塞( STEMI ) .Methods 经历了的有 STEMI 的 259 个病人主要在 12 小时症状发作以内的一种总线标准是 enrolled.The 男组由 143 个男人组成了>没有年龄 lim , 55 年,和一个女组包括了 116LIU Yu WANG Le-feng YANG Xin-chun GE Yong-gui WANG Hong-shi XU Li LI Wei-ming NI Zhu-hua XIA Kun CHI Yong-hui LI Qiang ZHANG Da-peng WU Xiao-qing SUN Hao GUO Zong-sheng 2008Chinese Medical Journal2008,,23:9
11Determination of 15 phthalate esters in air by gas-phase and particle-phase simultaneous sampling显示文摘Based on previous research,the sampling and analysis methods for phthalate esters(PAEs)were improved by increasing the sampling flow of indoor air from 1 to 4 L/min,shortening the sampling duration from 8 to 2 hr. Meanwhile,through the optimization of chromatographic conditions,the concentrations of 9 additional PAE pollutants in indoor air were measured. The optimized chromatographic conditions required a similar amount of time for analysis as before,but gave high responsivity,the capability of simultaneously distinguishing 15 kinds of PAEs,and a high level of discrimination between individual sample peaks,as well as stable peak generation. The recovery rate of all gas-phase and particle-phase samples of the 15 kinds of PAEs ranged from 91.26% to 109.42%,meeting the quantitative analysis requirements for indoor and outdoor air sampling and analysis. For the first time,investigation of the concentration levels as well as characteristics of 15 kinds of PAEs in the indoor air from four different traffic micro-environments(private vehicles,busses,taxis and subways)was carried out,along with validation of the optimized sampling and analytical method. The results show that all the 9 additional PAEs could be detected at relatively high pollution levels in the indoor air from the four traffic micro-environments. As none of the pollution levels of the 15 kinds of PAEs in the indoor air from the 4 traffic micro-environments should be neglected,it is of great significance to increase the types of PAEs able to be detected in indoor air.Chenchen Chi Meng Xia Chen Zhou Xueqing Wang Mili Weng Xueyou Shen 2017Journal of Environmental Sciences2017,29,5:7
12SARS-CoV-2 envelope protein causes acute respiratory distress syndrome (ARDS)-like pathological damages and constitutes an antiviral target显示文摘Cytokine storm and multi-organ failure are the main causes of SARS-CoV-2-related death.However,the origin of excessive damages caused by SARS-CoV-2 remains largely unknown.Here we show that the SARS-CoV-2 envelope(2-E)protein alone is able to cause acute respiratory distress syndrome(ARDS)-like damages in vitro and in vivo.Bingqing Xia Xurui Shen Yang He Xiaoyan Pan Feng-Liang Liu Yi Wang Feipu Yang Sui Fang Yan Wu Zilei Duan Xiaoli Zuo Zhuqing Xie Xiangrui Jiang Ling Xu Hao Chi Shuangqu Li Qian Meng Hu Zhou Yubo Zhou Xi Cheng Xiaoming Xin Lin Jin Hai-Lin Zhang Dan-Dan Yu Ming-Hua Li Xiao-Li Feng Jiekai Chen Hualiang Jiang Gengfu Xiao Yong-Tang Zheng Lei-Ke Zhang Jingshan Shen Jia Li Zhaobing Gao 2021Cell Research2021,31,8:7
13Osteoblast/fibroblast coculture derived bioactive ECM with unique matrisome profile facilitates bone regeneration显示文摘Extracellular matrix(ECM)with mimetic tissue niches was attractive to facilitate tissue regeneration in situ via recruitment of endogenous cells and stimulation of self-healing process.However,how to engineer the complicate tissue specific ECM with unique matrisome in vitro was a challenge of ECM-based biomaterials in tissue engineering and regenerative medicine.Here,we introduced coculture system to engineer bone mimetic ECM niche guided by cell-cell communication.In the cocultures,fibroblasts promoted osteogenic differentiation of osteoblasts via extracellular vesicles.The generated ECM(MN-ECM)displayed a unique appearance of morphology and biological components.The advantages of MN-ECM were demonstrated with promotion of multiple cellular behaviors(proliferation,adhesion and osteogenic mineralization)in vitro and bone regeneration in vivo.Moreover,proteomic analysis was used to clarify the molecular mechanism of MN-ECM,which revealed a specific matrisome signature.The present study provides a novel strategy to generate ECM with tissue mimetic niches via cell-cell communication in a coculture system,which forwards the development of tissue-bioactive ECM engineering along with deepening the understanding of ECM niches regulated by cells for bone tissue engineering.Mei Li Anqi Zhang Jiajing Li Jing Zhou Yanan Zheng Chi Zhang Dongdong Xia Haijiao Mao Jiyuan Zhao 2020Bioactive Materials2020,5,4:7
14Recent advances in emerging techniques for non-destructive detection of seed viability: A review显示文摘Over the past decades,imaging and spectroscopy techniques have been developed rapidly with widespread applications in non-destructive agro-food quality determination.Seeds are one of themost fundamental elements of agriculture and forestry.Seed viability is of great significance in seed quality characteristics reflecting potential seed germination,and there is a great need for a quick and effective method to determine the germination condition and viability of seeds prior to cultivate,sale and plant.Some researches based on spectra and/or image processing and analysis have been explored in terms of the external and internal quality of a variety of seeds.Many attempts have been made in image segmentation and spectra correction methods to predict seed quality using various traditional and novel methods.This review focuses on the comparative introduction,development and applications of emerging techniques in the analysis of seed viability,in particular,near infrared spectroscopy,hyperspectral and multispectral imaging,Raman spectroscopy,infrared thermography,and soft X-ray imaging methods.The basic theories,principle components,relative chemometric processing,analytical methods and prediction accuracies are reported and compared.Additionally,on the foundation of the observed applications,the technical challenges and future outlook for these emerging techniques are also discussed.Yu Xia Yunfei Xu Jiangbo Li Chi Zhang Shuxiang Fan 2019Artificial Intelligence in Agriculture2019,,1:7
15Novel synthesis of N-doped graphene as an efficient electrocatalyst towards oxygen reduction显示文摘做氮的 graphene (NG ) 被一个新奇、灵巧、可伸缩的自底向上的方法成功地综合。退火的 NG (NG -- 一) 拥有的高特定的表面区域和一块层次多孔的质地,和在在碱、酸的媒介的氧减小反应的展出显著地改进的 electrocatalytic 活动。分子的动态模拟显示了的 Ab initio 那快速的 H 转移和六成员的 N 结构的热力学的稳定性在 600 敮 x 从 pyrrolic 把包含 N 种类的转变提升了到Ruguanq Ma Xiaodong Ren Bao Yu Xia Yao Zhou Chi Sun Qian Liu Jianjun Liu Jiacheng Wang 2016Nano Research2016,9,3:6
16Untreated Prior Pulmonary Tuberculosis Adversely Affects Pregnancy Outcomes in Infertile Women Undergoing in vitro Fertilization and Embryo Transfer: A Large Retrospective Cohort Study显示文摘Objective Prior pulmonary tuberculosis(PTB) on chest X-ray(CXR) was commonly found in infertile patients receiving examinations before in vitro fertilization and embryo transfer(IVF-ET). It was unclear whether untreated PTB would affect pregnancy outcomes after IVF-ET.Method We conducted a retrospective cohort study of 14,254 infertile patients who had received IVFET at Peking University Third Hospital in 2017. Prior PTB was defined as the presence of signs suggestive of old or inactive PTB on CXR, with or without a clinical TB history. Patients who had prior PTB on CXR but had not received a clinical diagnosis and anti-TB therapy were included for analysis. Live birth,clinical pregnancy, and miscarriage rates were compared between the untreated PTB and non-PTB groups.Results The untreated PTB group had significantly lower clinical pregnancy(31.7% vs. 38.1%) and live birth(23.8% vs. 30.6%) rates than the non-PTB group(both P < 0.001). Multivariate analysis revealed that untreated PTB was a risk factor for decreased live birth rate [odds ratio(OR), 0.80;95% confidence interval(CI), 0.66–0.98;P = 0.028] in all patients and for increased miscarriage(OR, 4.19;95% CI,1.69–10.39;P = 0.002) and decreased live birth(OR, 0.45;95% CI, 0.24–0.83;P = 0.011) rates in patients with unexplained infertility.Conclusions Untreated PTB was associated with adverse pregnancy outcomes after IVF-ET, especially in patients with unexplained infertility, highlighting the clinical significance of PTB in this specific patient population.GAI Xiao Yan CHI Hong Bin ZENG Lin CAO Wen Li CHEN Li Xue ZHANG Chen LU Ming NING Lan Ding CHANG Chun ZHANG Wei Xia LIU Ping LI Rong SUN Yong Chang QIAO Jie 2021Biomedical and Environmental Sciences2021,34,2:6
17Lipid nanoparticle-encapsulated mRNA antibody provides longterm protection against SARS-CoV-2 in mice and hamsters显示文摘Monoclonal antibodies represent important weapons in our arsenal to against the CO VID-19 pandemic.However,this potential is severely limited by the time-consuming process of developing effective antibodies and the relative high cost of manufacturing.Herein,we present a rapid and cost-effective lipid nanoparticle(LNP)encapsulated-mRNA platform for in vivo delivery of SARS-CoV-2 neutralization antibodies.Two mRNAs encoding the light and heavy chains of a potent SARS-CoV-2 neutralizing antibody HB27,which is currently being evaluated in clinical trials,were encapsulated into clinical grade LNP formulations(named as mRNA-HB27-LNP).I n vivo characterizatio n dem on strated that intravenous administratio n of mRNA-HB27-LNP in mice resulted in a longer circulating half-life compared with the original HB27 antibody in protein format.More importantly,a single prophylactic administration of mRNA-HB27-LNP provided protection against SARS-CoV-2 challenge in mice at 1,7 and even 63 days post administration.In a close contact transmission model,prophylactic administration of mRNA-HB27-LNP prevented SARS-CoV-2 in fecti on betwee n hamsters in a dose-depende nt mariner.Overall,our results dem on strate a superior Ion g-term protect!on agai nst SARS-CoV-2 conferred by a single administration of this unique mRNA antibody,highlight!ng the potential of this universal platform for antibody-based disease prevention and therapy against COVID-19 as well as a variety of other infectious diseases.Yong-Qiang Deng Na-Na Zhang Yi-Fei Zhang Xia Zhong Sue Xu Hong-Ying Qiu Tie-Cheng Wang Hui Zhao Chao Zhou Shu-Long Zu Qi Chen Tian-Shu Cao Qing Ye Hang Chi Xiang-Hui Duan Dan-Dan Lin Xiao-Jing Zhang Liang-Zhi Xie Yu-Wei Gao Bo Ying Cheng-Feng Qin 2022Cell Research2022,32,4:5
18Nosocomial Infection Surveillance in a Tuberculosis Specialized Hospital in China显示文摘Nosocomial infections(NIs) are a critical issue affecting the quality of healthcare. In this study, we performed a retrospective study to explore the incidence rates, mortality rates, and microbial spectrum of NIs in Beijing Chest Hospital, a tuberculosis(TB) specialized hospital in China. Our data demonstrate that the overall incidence rate of inpatients with NIs slightly decreased from 2012 to 2016, which may be associated with the implementation of hand hygiene measures, while the mortality rates associated with NI did not significantly change. In addition, the species distribution of NIs was quite different from that presented in previous reports, and Klebsiella pneumoniae was the most frequently isolated microorganism.XIE Zhong Yao HUANG Guo Fang GAO Hui CHI Yu Qing WANG Yan Xia PANG Yu WANG Jing Ping 2017Biomedical and Environmental Sciences2017,30,9:5
19Analysis of the influencing factors of PAEs volatilization from typical plastic products显示文摘The primary emphasis of this research was to investigate the foundations of phthalate(PAEs) pollutant source researches and then firstly confirmed the concept of the coefficient of volatile strength, namely phthalate total content in per unit mass and unit surface area of pollutant sources. Through surveying and evaluating the coefficient of volatile strength of PAEs from typical plastic products, this research carried out reasonable classification of PAEs pollutant sources into three categories and then investigated the relationship amongst the coefficient of volatile strength as well as other environmental factors and the concentration level of total PAEs in indoor air measured in environment chambers.Research obtained phthalate concentration results under different temperature, humidity,the coefficient of volatile strength and the closed time through the chamber experiment. In addition, this study further explored the correlation and ratio of influencing factors that affect the concentration level of total PAEs in environment chambers, including environmental factors, the coefficient of volatile strengths of PAEs and contents of total PAEs in plastic products. The research created an improved database system of phthalate the coefficient of volatile strengths of each type of plastic goods, and tentatively revealed that the volatile patterns of PAEs from different typical plastic goods, finally confirmed that the coefficient of volatile strengths of PAEs is a major factor that affects the indoor air total PAEs concentration, which laid a solid foundation for further establishing the volatile equation of PAEs from plastic products.Weidong Chen Chenchen Chi Chen Zhou Meng Xia Cees Ronda Xueyou Shen 2018Journal of Environmental Sciences2018,30,4:5
20Enhancement of cellular uptake, transport and oral absorption of protease inhibitor saquinavir by nanocrystal formulation显示文摘目的: Saquinavir (SQV ) 是为 HIV 感染的处理的第一个朊酶禁止者,但是与差的溶解度。这研究的目的是为改进 SQV 的口头的吸收准备胶体的 nanocrystal 暂停。Yuan HE Deng-ning XIA Qiu-xia LI Jin-song TAO Yong GAN Chi WANG 2015Acta Pharmacologica Sinica2015,36,9:4
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