维普中文期刊产品整合服务
83篇 您的检索式:作者名="Po ZHANG"
    题名 作者 年代 出处 被引量
1Propofol differentially induces unconsciousness and respiratory depression through distinct interactions between GABAa receptor and GABAergic neuron in corresponding nuclei显示文摘Propofol is the most commonly used intravenous anesthetic worldwide.It can induce loss of consciousness prior to the occurrence of severe respiratory suppression,which is also a pharmacodynamic feature of all general anesthetics.However,the neural mechanisms underlying this natural phenomenon are controversial and highly related to patient safety.In the present study,we demonstrated that the pharmacodynamic effects of propofol(50 and 100 μM)on suppression of consciousness-related excitatory postsynaptic currents in the medial prefrontal cortex(mPFC)and centromedian nucleus of the thalamus(CMT)were lower than those in the kernel respiratory rhythmogenesis nucleus pre-Botzinger complex(PrBo).Furthermore,we unexpectedly found that the GABAa receptor β3 subunit is the key target for propofol's action and that it is mutually and exclusively expressed in GABAergic neurons.It is also more abundant in the mPFC and CMT,but mainly co-localized with GABAergic neurons in the PrBo.As a result,the differentiated expression pattern should mediate more neuron suppression through the activation of GABAergic neurons in the mPFC and CMT at low doses of propofol(50 μM).However,PrBo GABAergic neurons were only activated by propofol at a high dose(100 μM).These results highlight the detailed pharmacodynamic effects of propofol on consciousness-related and respiration-related nuclei and provide the distinct interaction mechanism between the β3 subunit and GABAergic neurons in mediating the suppression of consciousness compared to the inhibition of respiration.Junli Jiang Yingfu Jiao Po Gao Wen Yin Wei Zhou Yunchun Zhang Yanjun Liu Daxiang Wen Yuan Wang Liang Zhou Tian Yu Weifeng Yu 2021Acta Biochimica et Biophysica Sinica2021,53,8:11
2Modeling of elastic wave propagation on a curved free surface using an improved finite-difference algorithm显示文摘Based on existing direct and imaging methods of a staggered finite-difference scheme, an improved algorithm for staggered finite-difference is proposed to implement rugged topographic free boundary conditions. This method assumes that the free surface can be implemented with horizontal and vertical free surface segments and their corners; the free surface passes through the grid points of shear stress components, instead of the normal stress components. Imaging is carried out for stress components in both horizontal and vertical directions, thus increasing the accuracy. To update particle- velocities, imaging and updating are first performed in the horizontal direction, and then in the vertical direction. The numerical results for elastic flat horizontal free surface with the imaging method and those for flat free surfaces of various slope angles with the proposed method are compared, and are shown to be in good agreement. The advantage of the proposed method is that only the stresses are dealt with in implementing the free surface into the staggered algorithm, which improves computation efficiency.WANG Xiuming1,3 & ZHANG Hailan2 1. CSIRO Petroleum, ARRC, PO BOX 1130, Technology Park, Bentley, WA 6102, Australia 2. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China 3. Present address: Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China 2004Science China(Physics,Mechanics & Astronomy)2004,47,5:11
3An online maximum power point capturing technique for highefficiency power generation of solar photovoltaic systems显示文摘This paper proposes a novel high-efficiency generation technique for photovoltaic(PV) system,named maximum power point capturing(MPPC) technique. This is an aperiodic perturbation MPPC technique compared to the conventional periodic perturbation maximum power point tracking technique. Firstly, under a closed-loop circuit and an open-loop circuit,the complete I-V curves and P-V curves are defined. Secondly, the proposed MPPC technique is based on the complete I-V curves and a practical model of solar PV systems.The proposed method realizes that maximum power point(MPP) is captured online, and its control strategy is designed to set a steady operating area around MPP. The duty cycle keeps constant when the operating point is within the steady operating area, i.e., aperiodic perturbation, and when the operating point is outside the steady operating area, MPPC is triggered to capture a new MPP with an updated steady operating area. Simulation results demonstrate that no oscillations exist in steady-state;dynamic performances are improved;and only two perturbations are required to capture the new MPP. Using the proposed MPPC method,low voltage ride through and high voltage ride through can be prevented.Lijun ZHANG Samson Shenglong YU Tyrone FERNANDO Herbert Ho-Ching IU Kit Po WONG 2019Journal of Modern Power Systems and Clean Energy2019,7,2:8
4Learning curve of computer-assisted navigation system in spine surgery显示文摘用帮助计算机的航行(罐头) 的背景脊骨外科被证明了导致低螺丝钉误放率,放射暴露的低发生和看的优秀的起作用的地对常规 intraoperative 图象 intensifier (C) 。不管多么当我们知道,以前的研究描述了的很少二个连续盒子队与不同经验背景, A 和 B 在花梗螺丝钉精确性和二位脊骨外科医生的起作用的时间上学习的在我们执行了的脊骨 surgery.Methods 的罐头的学习曲线,在一个机构在一样的时期期间。外皮的穿孔率和操作使用的一样的类型的起作用的时间装的腰部的花梗螺丝钉被分析并且比较了为二位外科医生使用 C 在起始,当四年的全部的盒子被包括时, 6 个月和 12 月罐头 usage.Results 罐头脊骨外科为外科医生 A 和 B 队与 C 相比有全面更低的外皮的穿孔率和不太吝啬的起作用的时间。它错过了是统计上重要的,与 3.3% 对 4.7%(P=0.191 ) 并且为外科医生 A 的 125.7 对 132.3 分钟(P=0.428 ) 并且 3.6% 对 6.4%(P=0.058 ) ,并且为外科医生 B 的 183.2 对 213.2 分钟(P=0.070 ) 。在一次尝试到表明学习曲线,在 6 月在每位外科医生的队的罐头系统以后的盒子被比较。穿孔率在 2.4% 减少了(P=0.039 ) 并且 4.3%(P=0.003 ) 并且起作用的时间分别地为外科医生 A 和 B 的 CAN 组到 31.8 分钟(P=0.002 ) 和 14.4 分钟(P=0.026 ) 被减少。当仅仅盒子表现在 12 以后时,用 CAN 系统的月被考虑,穿孔率在3.9%减少了( P=0.006 )并且5.6%( P 0.001 )并且起作用的时间为外科医生 A 和 B 的 CAN 组到 20.9 分钟( P 0.001 )和 40.3 分钟( P 0.001 )被减少, respectively.Conclusions 长远来说,罐头脊骨外科减少了腰部的螺丝钉外皮的穿孔率和起作用的时间。在 6 月使用在 12 个月以后装那 plateaued 以后,学习曲线显示出锋利的落下;它被穿孔率和起作用的时间数据表明。数据的小心的分析证明罐头是特别有用的让更少的富有经验的外科医生减少穿孔率和 intraoperative 时间,尽管进一步比较的研究被期望。BAI Yu-shu ZHANG Ye CHEN Zi-qiang WANG Chuan-feng ZHAO Ying-chuan SHI Zhi-cai LI Ming LIU Ka Po Gabriel 2010Chinese Medical Journal2010,,21:8
5Transarterial chemoembolization with PD-(L)1 inhibitors plus molecular targeted therapies for hepatocellular carcinoma(CHANCE001)显示文摘There is considerable potential for integrating transarterial chemoembolization(TACE),programmed death-(ligand)1(PD-[L]1)inhibitors,and molecular targeted treatments(MTT)in hepatocellular carcinoma(HCC).It is necessary to investigate the therapeutic efficacy and safety of TACE combined with PD-(L)1 inhibitors and MTT in real-world situations.In this nationwide,retrospective,cohort study,826 HCC patients receiving either TACE plus PD-(L)1 blockades and MTT(combination group,n=376)or TACE monotherapy(monotherapy group,n=450)were included from January 2018 to May 2021.The primary endpoint was progression-free survival(PFS)according to modified RECIST.The secondary outcomes included overall survival(OS),objective response rate(ORR),and safety.We performed propensity score matching approaches to reduce bias between two groups.After matching,228 pairs were included with a predominantly advanced disease population.Median PFS in combination group was 9.5 months(95%confidence interval[CI],8.4-11.0)versus 8.0 months(95%CI,6.6-9.5)(adjusted hazard ratio[HR],0.70,P=0.002).OS and ORR were also significantly higher in combination group(median OS,19.2[16.1-27.3]vs.15.7 months[13.0-20.2];adjusted HR,0.63,P=0.001;ORR,60.1%vs.32.0%;P<0.001).Grade 3/4 adverse events were observed at a rate of 15.8%and 7.5%in combination and monotherapy groups,respectively.Our results suggest that TACE plus PD-(L)1 blockades and MTT could significantly improve PFS,OS,and ORR versus TACE monotherapy for Chinese patients with predominantly advanced HCC in real-world practice,with an acceptable safety profile.Hai-Dong Zhu Hai-Liang Li Ming-Sheng Huang Wei-Zhu Yang Guo-Wen Yin Bin-Yan Zhong Jun-Hui Sun Zhi-Cheng Jin Jian-Jian Chen Nai-Jian Ge Wen-Bin Ding Wen-Hui Li Jin-Hua Huang Wei Mu Shan-Zhi Gu Jia-Ping Li Hui Zhao Shu-Wei Wen Yan-Ming Lei Yu-Sheng Song Chun-Wang Yuan Wei-Dong Wang Ming Huang Wei Zhao Jian-Bing Wu Song Wang Xu Zhu Jian-Jun Han Wei-Xin Ren Zai-Ming Lu Wen-Ge Xing Yong Fan Hai-Lan Lin Zi-Shu Zhang Guo-Hui Xu Wen-Hao Hu Qiang Tu Hong-Ying Su Chuan-Sheng Zheng Yong Chen Xu-Ya Zhao Zhu-Ting Fang Qi Wang Jin-Wei Zhao Ai-Bing Xu Jian Xu Qing-Hua Wu Huan-Zhang Niu Jian Wang Feng Dai Dui-Ping Feng Qing-Dong Li Rong-Shu Shi Jia-Rui Li Guang Yang Hai-Bin Shi Jian-Song Ji Yu-E Liu Zheng Cai Po Yang Yang Zhao Xiao-Li Zhu Li-Gong Lu Gao-Jun Teng 2023Signal Transduction and Targeted Therapy2023,8,3:7
6MAP kinase gene STK1 is required for hyphal, conidial, and appressorial development, toxin biosynthesis, pathogenicity, and hypertonic stress response in the plant pathogenic fungus Setosphaeria turcica显示文摘The mitogen-activated protein kinase(MAPK), a key signal transduction component in the MAPK cascade pathway, regulates a variety of physiological activities in eukaryotes. However, little is known of the role MAPK plays in phytopathogenic fungi. In this research, we cloned the MAPK gene STK1 from the northern corn leaf blight pathogen Setosphaeria turcica and found that the gene shared high homology with the high osmolality glycerol(HOG) MAPK gene HOG1 of Saccharomyces cerevisiae. In addition, gene knockout technology was employed to investigate the function of STK1. Gene knockout mutants(KOs) were found to have altered hyphae morphology and no conidiogenesis, though they did show similar radial growth rate compared to the wild-type strain(WT). Furthermore, microscope observations indicated that STK1 KOs did not form normal appressoria at 48 h post-inoculation on a hydrophobic surface. STK1 KOs had reduced virulence, a significantly altered Helminthosporium turcicum(HT)-toxin composition, and diminished pathogenicity on the leaves of susceptible inbred corn OH43. Mycelium morphology appeared to be significantly swollen and the radial growth rates of STK1 KOs declined in comparison with WT under high osmotic stress. These results suggested that STK1 affects the hyphae development, conidiogenesis, and pathogenicity of S. turcica by regulating appressorium development and HT-toxin biosynthesis. Moreover, the gene appears to be involved in the hypertonic stress response in S. turcica.LI Po GONG Xiao-dong JIA Hui FAN Yong-shan ZHANG Yun-feng CAO Zhi-yan HAO Zhi-min HAN Jian-min GU Shou-qin DONG Jin-gao 2016Journal of Integrative Agriculture2016,15,12:7
7Metal halide perovskite nanocrystals and their applications in optoelectronic devices显示文摘In recent years, metal halide perovskite nanocrystals (NCs) have been favored by manyresearchers due to their unique properties including long carrier diffusion length, highcarrier mobility, tunable emission wavelength, and narrow full width at half maximum,making them great application potentials in optoelectronic devices. The photoluminescencequantum yields of perovskite NCs are nearly 100%, and the device efficiencyof perovskite NC-based light-emitting diodes (LEDs) has been improvedsignificantly from below 0.1% to over 20%. In addition, perovskite NC-based solarcells and photodetectors have also developed rapidly in recent years. Here, we summarizethe synthesis and the basic optoelectronic properties of metal halide perovskiteNCs and introduce their applications in LEDs, solar cells, and photodetectors.Po Lu Min Lu Hua Wang Ning Sui Zhifeng Shi William W.Yu Yu Zhang 2019InfoMat2019,1,4:7
8Development of gated fiber detectors for laser-induced strong electromagnetic pulse environments显示文摘With the development of laser technologies,nuclear reactions can happen in high-temperature plasma environments induced by lasers and have attracted a lot of attention from different physical disciplines.However,studies on nuclear reactions in plasma are still limited by detecting technologies.This is mainly due to the fact that extremely high electromagnetic pulses(EMPs)can also be induced when high-intensity lasers hit targets to induce plasma,and then cause dysfunction of many types of traditional detectors.Therefore,new particle detecting technologies are highly needed.In this paper,we report a recently developed gated fiber detector which can be used in harsh EMP environments.In this prototype detector,scintillating photons are coupled by fiber and then transferred to a gated photomultiplier tube which is located far away from the EMP source and shielded well.With those measures,the EMPs can be avoided which may result that the device has the capability to identify a single event of nuclear reaction products generated in laser-induced plasma from noise EMP backgrounds.This new type of detector can be widely used as a time-of-flight(TOF)detector in high-intensity laser nuclear physics experiments for detecting neutrons,photons,and other charged particles.Po Hu Zhi-Guo Ma Kai Zhao Guo-Qiang Zhang De-Qing Fang Bao-Ren Wei Chang-Bo Fu Yu-Gang Ma 2021Nuclear Science and Techniques2021,32,6:6
9太极锻炼对血脂的临床疗效:随机对照试验的meta分析(英文)显示文摘目的:探讨太极锻炼是否能改善血脂水平。创新点:明确太极锻炼对血脂的影响,为非药物调脂治疗提供新手段。方法:通过筛选太极锻炼持续4周以上,PEDro评分3分以上,且观察太极锻炼对血脂影响的成人随机对照试验,meta分析太极锻炼对总胆固醇、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇和甘油三酯的影响。结论:通过meta分析最终入选的6项研究(共445例患者)的结果显示,太极锻炼能显著降低血甘油三酯水平,且有降低总胆固醇的趋势,但是对于低密度脂蛋白胆固醇和高密度脂蛋白胆固醇未发现有明显影响。Xiao-hong PAN Amina MAHEMUTI Xue-hua ZHANG Ya-ping WANG Po HU Ju-bo JIANG Mei-xiang XIANG Gang LIU Jian-an WANG 2016Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2016,17,8:5
10Analysis of leakage current in GaAs micro-solar cell arrays显示文摘The output characteristics of micro-solar cell arrays are analyzed on the basis of a modified model in which the shunt resistance between cell lines results in current leakage.The modification mainly consists of adding a shunt resistor network to the traditional model.The obtained results agree well with the reported experimental results.The calculation results demonstrate that leakage current in substrate affects seriously the performance of GaAs micro-solar cell arrays.The performance of arrays can be improved by reducing the number of cells per line.In addition,at a certain level of integration,an appropriate space occupancy rate of the single cell is recommended for ensuring high open circuit voltages,and it is more appropriate to set the rates at 80%-90% through the calculation.WANG YanShuo1,CHEN NuoFu1,2,3,ZHANG XingWang1,BAI YiMing1,WANG Yu1,HUANG TianMao1,ZHANG Han1 & SHI HuiWei1 1 Key Laboratory of Semiconductor Materials Science,Institute of Semiconductors,Chinese Academy of Sciences,PO Box 912,Beijing 100083,China 2 School of Renewable Energy Engineering,North China Electric Power University,Beijing 102206,China 3 National Laboratory of Micro-Gravity,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China 2010Science China(Technological Sciences)2010,53,5:5
11Sequential quadratic programming particle swarm optimization for wind power system operations considering emissions显示文摘In this paper,a computation framework for addressing combined economic and emission dispatch(CEED)problem with valve-point effects as well as stochastic wind power considering unit commitment(UC)using a hybrid approach connecting sequential quadratic programming(SQP)and particle swarm optimization(PSO)is proposed.The CEED problem aims to minimize the scheduling cost and greenhouse gases(GHGs)emission cost.Here the GHGs include carbon dioxide(CO_(2)),nitrogen dioxide(NO_(2)),and sulphur oxides(SO_(x)).A dispatch model including both thermal generators and wind farms is developed.The probability of stochastic wind power based on the Weibull distribution is included in the CEED model.The model is tested on a standard system involving six thermal units and two wind farms.A set of numerical case studies are reported.The performance of the hybrid computational method is validated by comparing with other solvers on the test system.Yang ZHANG Fang YAO Herbert Ho-Ching IU Tyrone FERNANDO Kit Po WONG 2013Journal of Modern Power Systems and Clean Energy2013,1,3:5
12The role of pineal microRNA-325 in regulating circadian rhythms after neonatal hypoxic-ischemic brain damage显示文摘Circadian rhythm disorder is a common,but often neglected,consequence of neonatal hypoxic-ischemic brain damage(HIBD).However,the underlying molecular mechanisms remain largely unknown.We previously showed that,in a rat model of HIBD,up-regulation of microRNA-325(miR-325)in the pineal gland is responsible for the suppression of Aanat,a key enzyme involved in melatonin synthesis and circadian rhythm regulation.To better understand the mechanism by which miR-325 affects circadian rhythms in neonates with HIBD,we compared clinical samples from neonates with HIBD and samples from healthy neonates recruited from the First Affiliated Hospital of Soochow University(Dushuhu Branch)in 2019.We found that circulating miR-325 levels correlated positively with the severity of sleep and circadian rhythm disorders in neonates with HIBD.Furthermore,a luciferase reporter gene assay revealed that LIM homeobox 3(LHX3)is a novel downstream target of miR-325.In addition,in miR-325 knock-down mice,the transcription factor LHX3 exhibited an miR-325-dependent circadian pattern of expression in the pineal gland.We established a neonatal mouse model of HIBD by performing doublelayer ligation of the left common carotid artery and exposing the pups to a low-oxygen environment for 2 hours.Lhx3 mRNA expression was significantly down-regulated in these mice and partially rescued in miR-325 knockout mice subjected to the same conditions.Finally,we showed that improvement in circadian rhythm-related behaviors in animals with HIBD was dependent on both miR-325 and LHX3.Taken together,our findings suggest that the miR-325-LHX3 axis is responsible for regulating circadian rhythms and provide novel insights into the identification of potential therapeutic targets for circadian rhythm disorders in patients with neonatal HIBD.The clinical trial was approved by Institutional Review Board of Children’s Hospital of Soochow University(approval No.2015028)on July 20,2015.Animal experiments were approved by Animal Care and Use Committee,School of Medicine,Soochow University,China(approval No.XD-2016-1)on January 15,2016.Ning Sha Hua-Wei Wang Bin Sun Min Gong Po Miao Xiao-Lu Jiang Xiao-Feng Yang Mei Li Li-Xiao Xu Chen-Xi Feng Yuan-Yuan Yang Jie Zhang Wen-Jing Zhu Yuan-Yuan Gao Xing Feng Xin Ding 2021Neural Regeneration Research2021,16,10:4
13A Natural Vaccine Candidate Strain Against Cholera显示文摘E1 Tor Vibrio cholerae (EVC) strains may be classifled into two kinds-epidemigenic (EEVC) strains and non-epidemigenic (NEEVC) strains-based on a phage-biotyping system. A large number of EEVC strains have been screened for toxigenic and putative colonization attributes. One such naturally occurring strain (designated IEM 101) has been found which is devoid of genes encoding cholera toxin (CT), accessory cholera enterotoxin (ACE), zonula occludens toxin (ZOT), but possesses RS1 sequences and toxin-coregulated pilus A gene (tcpA) although tcpA is poorly expressed. It expresses type B pili but does not posses type C pili. It is an E1 Tor Ogawa strain and does not cause fluid accumulation in rabbit ileal loop tests. Active immunization of rabbits with strain IEM 101 elicited good protection against challenge with virulent strains of V cholerae O1. Oral administrationcaused no side effects in 15 human volunteers, colonized the gut for four to ten days and elicited good immuneLIU YAN-QING QI GUO-MING WANG SHI-XIA YU YONG-MAO DUAN GUANG-CAI ZHANG LI-JUAN AND GAO SHOU-YI(Institute of Epidemiology and Mcrobiology, Chinese Academp ofPreventive Medicine, PO Box 5, ChangpingBeijing 102206, China) 1995Biomedical and Environmental Sciences1995,8,4:4
14Quantifying the effectiveness of SiO_2/Au light trapping nanoshells for thin film poly-Si solar cells显示文摘In order to enhance light absorption of thin film poly-crystalline silicon(TF poly-Si)solar cells over a broad spectral range, and quantify the effectiveness of nanoshell light trapping structure over the full solar spectrum in theory,the effective photon trapping flux(EPTF)and effective photon trapping efficiency(EPTE)were firstly proposed by considering both the external quantum efficiency of TF poly-Si solar cell and scattering properties of light trapping structures.The EPTF,EPTE and scattering spectrum exhibit different behaviors depending on the geometric size and density of nanoshells that form the light trapping layer.With an optimum size and density of SiO2/Au nanoshell light trapping layer,the EPTE could reach up to 40%due to the enhancement of light trapping over a broad spectral range,especially from 500 to 800 nm.BAI YiMing 1 ,WANG Jun 2 ,CHEN NuoFu 1,3 ,YAO JianXi 1 ,YIN ZhiGang 3 ,ZHANG Han 3 , ZHANG XingWang 3 ,HUANG TianMao 3 ,WANG YanShuo 3 &YANG XiaoLi 3 1School of Renewable Energy Engineering,North China Electric Power University,Beijing 102206,China 2 National Engineering Research Center for Optoelectronic Devices,Institute of Semiconductors, Chinese Academy of Sciences,PO Box 912,Beijing 100083,China 3 Key Laboratory of Semiconductor Materials Science,Institute of Semiconductors, Chinese Academy of Sciences,PO Box 912,Beijing 100083,China 2010Science China(Technological Sciences)2010,53,8:4
15Chromosome-scale genome assembly of sweet cherry(Prunus avium L.)cv.Tieton obtained using long-read and Hi-C sequencing显示文摘Sweet cherry(Prunus avium)is an economically significant fruit species in the genus Prunus.However,in contrast to other important fruit trees in this genus,only one draft genome assembly is available for sweet cherry,which was assembled using only Illumina short-read sequences.The incompleteness and low quality of the current sweet cherry draft genome limit its use in genetic and genomic studies.A high-quality chromosome-scale sweet cherry reference genome assembly is therefore needed.A total of 65.05 Gb of Oxford Nanopore long reads and 46.24 Gb of Illumina short reads were generated,representing~190x and 136x coverage,respectively,of the sweet cherry genome.The final de novo assembly resulted in a phased haplotype assembly of 344.29 Mb with a contig N50 of 3.25 Mb.Hi-C scaffolding of the genome resulted in eight pseudochromosomes containing 99.59%of the bases in the assembled genome.Genome annotation revealed that more than half of the genome(59.40%)was composed of repetitive sequences,and 40,338 protein-coding genes were predicted,75.40%of which were functionally annotated.With the chromosomescale assembly,we revealed that gene duplication events contributed to the expansion of gene families for salicylic acid/jasmonic acid carboxyl methyltransferase and ankyrin repeat-containing proteins in the genome of sweet cherry.Four auxin-responsive genes(two GH3s and two SAURs)were induced in the late stage of fruit development,indicating that auxin is crucial for the sweet cherry ripening process.In addition,772 resistance genes were identified and functionally predicted in the sweet cherry genome.The high-quality genome assembly of sweet cherry obtained in this study will provide valuable genomic resources for sweet cherry improvement and molecular breeding.Jiawei Wang Weizhen Liu Dongzi Zhu Po Hong Shizhong Zhang Shijun Xiao Yue Tan Xin Chen Li Xu Xiaojuan Zong Lisi Zhang Hairong Wei Xiaohui Yuan Qingzhong Liu 2020Horticulture Research2020,7,1:4
16Primary migration and secondary alteration of the Upper Paleozoic gas reservoir in Ordos Basin,China―Application of fluid inclusion gases显示文摘The composition of fluid inclusions(FI)often represents the initial geochemical characteristics of palaeo-fluid in reservoir rock.Influence on composition and carbon isotopic composition of gas during primary migration,reservoir-forming and subsequent secondary alterations are discussed through comparing fluid inclusion gas with coal-formed gas and natural gas in present gas reservoirs in the Ordos Basin.The results show that primary migration of gas has significant effect on the molecular but not on the carbon isotopic composition of methane.Migration and diffusion fractionation took place during the secondary migration of gas in Upper Paleozoic gas reservoir according to carbon isotopic composition of methane in FIs.Composition and carbon isotopic composition of natural gas were nearly unchanged after the gas reservoir forming through comparing the FI gases with the natural gas in present gas reservoir.GONG Se 1,2 ,PENG PingAn 1 ,SHUAI YanHua 3 ,DAI JinXing 3 &ZHANG WenZheng 4 1 Guangzhou Institute of Geochemistry,the Chinese Academy of Sciences,Guangzhou 510640,China 2 Common Wealth Scientific and Research Organization,Petroleum Resources,PO Box 136,North Ryde,New South Wales,1670,Australia 3 Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China 4 Research Institute of Exploration and Development,Changqing Petroleum Corporation,Xi’an 710021,China 2008Science China Earth Sciences2008,51,S1:3
17Stk2,a Mitogen-Activated Protein Kinase from Setosphaeria turcica,Specifically Complements the Functions of the Fus3 and Kss1 of Saccharomyces cerevisiae in Filamentation,Invasive Growth,and Mating Behavior显示文摘Setosphaeria turcica,an essential phytopathogenic fungus,is the primary cause of serious yield losses in corn;however,its pathogenic mechanism is poorly understood.We cloned STK2,a newly discovered mitogen-activated protein kinase gene with a deduced amino acid sequence that is 96%identical to MAK2 from Phaeosphaeria nodorum,56%identical to KSS1 and 57%identical to FUS3 from Saccharomyces cerevisiae.To deduce Stk2 function in S.turcica and to identify the genetic relationship between STK2 and KSS1/FUS3 from S.cerevisiae,a restructured vector containing the open reading frame of STK2 was transformed into a fus3/kss1 double deletion mutant of S.cerevisiae.The results show that the STK2complementary strain clearly formed pseudohyphae and ascospores,and the strain grew on the surface of the medium after rinsing with sterile water and the characteristics of the complementary strain was the same as the wild-type strain.Moreover,STK2 complemented the function of KSS1 in filamentation and invasive growth,as well as the mating behavior of FUS3 in S.cerevisiae,however,its exact functions in S.turcica will be studied in the future research.GU Shou-qin YANG Yang LI Po ZHANG Chang-zhi FAN Yu ZHANG Xiao-yu TIAN Lan HAO Zhi-min CAO Zhi-yan GONG Xiao-dong FAN Yong-shan HAN Jian-min DONG Jin-gao 2013Journal of Integrative Agriculture2013,12,12:3
18Study on products and reaction paths for synthesis of 3,4-dihydro-2H-3-phenyl-1,3-benzoxazine from phenol,aniline and formaldehyde显示文摘To study the synthesis of 3,4-dihydro-2H-3-phenyl-1,3-benzoxazine(benzoxazine),the reaction paths of phenol,aniline and formaldehyde were investigated by analyzing the synthesis crude products.With the aid of high-performance liquid chromatography(HPLC),chromatographic column and preparative HPLC,seven compounds originated from the crude products were obtained and their chemical structures were elucidated.Possible reaction paths are proposed based on these compounds.Results show that Nhydroxymethyl aniline(HMA) derived from the reaction of formaldehyde and aniline is probably the key intermediate during the reaction.HMA can react with itself or other reactants to form other intermediates,such as 1,3,5-triphenyl-1,3,5-triazinane and 2-((phenylamino)methyl)phenol,and further form benzoxazine and byproducts.Cheng-Xi Zhang Yu-Yuan Deng Yi-Yang Zhang Po Yang Yi Gu 2015Chinese Chemical Letters2015,26,3:2
19Validity of the Bouchet's complementary relationship at 102 observatories across China显示文摘Bouchet in 1963 hypothesized that for large homogeneous land surface with minimum advection of heat and moisture,there exists a 1:1 complementary relationship of potential and actual evaporation coupled through land-atmosphere feedbacks.The complementary relationship has been widely used to estimate regional actual evaporation and explain the pan evaporation paradox.We examine the standardized potential evaporation(potential evaporation divided by wet environment evaporation) at 102 observatories at different elevations across China.Generally,the relationship is appropriate at the low elevations(<1000 m).With the increase of elevation,vapor transfer power becomes much less than radiation energy budget because of lower vapor pressure deficit and stronger global solar radiation.As a result,at the high elevations(over 1000 m),the excess energy resulted by limited moisture availability is not enough to be converted into drying power of the air.This result suggests that the complementary relationship is asymmetric at the high elevations.YU JingJie1,2,ZHANG YongQiang3,LIU ChangMing1,2 1 Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China 2 Key Laboratory of Water Cycle and Related Land Surface Processes,Chinese Academy of Sciences,Beijing 100101,China 3 CSIRO Land and Water,PO Box 1666,Canberra ACT 2601,Australia 2009Science China Earth Sciences2009,52,5:2
20Mitochondria Redistribution in Enterovirus A71 Infected Cells and Its Effect on Virus Replication显示文摘Enterovirus A71(EV-A71)is one of the main causative agents of hand,foot and mouth disease(HFMD)and it also causes severe neurologic complications in infected children.The interactions between some viruses and the host mitochondria are crucial for virus replication and pathogenicity.In this study,it was observed that EV-A71 infection resulted in a perinuclear redistribution of the mitochondria.The mitochondria rearrangement was found to require the microtubule network,the dynein complex and a low cytosolic calcium concentration.Subsequently,the EV-A71 non-structural protein 2BC was identified as the viral protein capable of inducing mitochondria clustering.The protein was found localized on mitochondria and interacted with the mitochondrial Rho GTPase 1(RHOT1)that is a key protein required for attachment between the mitochondria and the motor proteins,which are responsible for the control of mitochondria movement.Additionally,suppressing mitochondria clustering by treating cells with nocodazole,EHNA,thapsigargin or A23187 consistently inhibited EV?A71 replication,indicating that mitochondria recruitment played a crucial role in the EV-A71 life cycle.This study identified a novel function of the EV-A71 2BC protein and provided a potential model for the regulation of mitochondrial motility in EV-A71 infection.Yang Yang Haolong Cong Ning Du Xiaodong Han Lei Song Wenliang Zhang Chunrui Li Po Tien 2019Virologica Sinica2019,34,4:2
返回顶部 每页显示:
共5页 首页 上一页 第1页 下一页 末页 /5 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费