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63篇 您的检索式:作者名="MengQS"
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1Spatial and temporal charac-teristics of VHF radiation source produced by lightning in supercell thunderstorms显示文摘The three-dimensional temporal and spatial characteristics of VHF radiation events produced by light-ning discharges in three supercell thunderstorms have been analyzed based on the data measured by the lightning map-ping array system with high time and space resolution. The results indicate that lightning hole (lighting free region) with about 5—6 km in diameter or lighting ring (annular lighting free region) is associated with the strong updraft in thunder-storm. The lasting time of lightning holes is either short or long, being about 20 min in a tornado-producing thunder-storm. The lightning holes appear before the occurrence of tornado. The lightning hole is the most obvious during the occurrence of tornado and some self-existent lighting radia-tion events appear at a height of 15—16 km. The lightning channels of inter-cloud (IC) lightning discharge exhibit clockwise rotary structures and do not have clear bilevel structures in the vicinity of the tornado. The lightning holes are corresponding to the strong updraft region. The tempo-ral and spatial distribution of lightning radiation events re-veals the structure of strong updraft in supercell thunder-storms. Positive cloud-to-ground (CG) lightning discharges dominate in these thunderstorms and the peak of positive CG lightning flash rate appears, with the maximum of 6 per minute, after or before the occurrence of tornado.ZHANGYijun MENGQing P.R.Krehbiel LIUXinsheng ZHOUXiuji 2004Chinese Science Bulletin2004,49,6:14
2Re-Os dating of the Raobazhai ultramafic massif in North Dabie显示文摘The ultramafic massif at Raobazhai in North Dabie is located in the suture zone between the Yangtze craton and North China craton. The Re-Os isotope compositions of the massif are used to decipher the origin and tectonics of the ultramafic rocks involved in continental subduction and exhumation. Fifteen samples were collected from five drill holes along the main SE-NW axis of the Raobazhai massif. Major and trace element compositions of the samples show linear correlations between MgO, Yb and Al2O3. This suggests that the massif experienced partial melting with variable degrees and is from fertile to deplete in basaltic compositions. Nine selected samples were analyzed for Re-Os isotope compositions. Re contents range from 0.004 to 0.376 ng/g, Os contents from 0.695 to 3.761 ng/g, ^187Re/^188Os ratios from 0.022 to 2.564 and ^187Os/^188Os ratios from 0.1165 to 0.1306. These indicate that the massif is a piece of continental lithospberic mantle with variable depletion. Using the positive correlations between ^187TOs/^188Os and Yb and Al2O3 respectively, a proxy isochron age of 1.8±0.1 Ga is obtained for the Raobazhai ultramafic massif, which is interpreted to represent a fragment of the ancient subcontinental lithospheric mantle. During Triassic subduction of the Yangtze craton beneath the North China craton, part of the wedge of subcontinental lithospheric mantle was intruded into the subduction belt, and then exhumed to crustal level together with the subducted crustal plate after ultrahigh pressure metamorphism at mantle depths. This ancient lithospheric mantle is now exposed as an orogenic peridotite massif.JINYongbin ZHIXiachen MENGQing GAOTianshan PENGZicheng 2004Chinese Science Bulletin2004,49,5:12
3Eye movement indices in the study of depressive disorder显示文摘YU LI Yangyang XU Mengqing XIA Tianhong ZHANG Junjie WANG Xu LIU Yongguang HE Jijun WANG 2016上海精神医学2016,28,6:6
4Interacting effects of multiple factors on the morphological evolution of the meandering reaches downstream the Three Gorges Dam显示文摘阐明河的过程上的水坝的影响能通知河保护和盆管理。然而,相对,很少研究集中了多重因素怎么交往影响蜿蜒地流的活动范围的词法进化。用水文学和地形学的数据,我们分析了下游地影响并且调整蜿蜒地流的活动范围的因素三个峡水坝(TGD ) 。我们的结论如下。(1 ) 蜿蜒地流的活动范围能在预先建水坝时期期间基于他们的进化被分类进二种类型:G1 活动范围,由侵蚀和凹面隧道免职(CECD ) ,和 G2 到达的凸的点酒吧描绘了,由凸的点酒吧免职和凹面隧道侵蚀(CDCE ) 描绘了。两种活动范围类型在水坝以后的时期期间展出了 CECD 特征。(2 ) 流动过程和沉积运输是引起了位于凸的点酒吧的低沙滩的严肃的侵蚀的因素。然而,在河政体,河边界和东廷·莱克的 jacking 的变化不对蜿蜒地流的活动范围的词法进化作为主要控制起作用。(3 ) 充满在凸的点酒吧的更大的侵蚀从 20,000 ~ 25,000 m 3/s 结果的分泌物。如果这些流动的持续时间,接近满满的分泌物,超过 20 天,点酒吧变得搜索。另外,在水流带来的碎石的减小引起在 water-falling 时期点酒吧 siltation 减少。(4 ) 在水坝以后的经期,洪水消退,分泌物从 20,000 ~ 25,000 m 3/s,的增加的持续时间和在沉积的重要减小期间,运输是引起了蜿蜒地流的活动范围显示出 CECD 特征的主要因素。在他们能通知估计河床变化,河管理策略和河保护的地方,我们的结果与另外的蜿蜒地流的活动范围相关。HAN Jianqiao ZHANG Wei FAN Yongyang YU Mengqing 2017Journal of Geographical Sciences2017,27,10:3
5Understanding the spatial representativeness of air quality monitoring network and its application to PM_(2.5)in the China's Mainland显示文摘Air pollution has seriously endangered human health and the natural ecosystem during the last decades.Air quality monitoring stations(AQMS)have played a critical role in providing valuable data sets for recording regional air pollutants.The spatial representativeness of AQMS is a critical parameter when choosing the location of stations and assessing effects on the population to long-term exposure to air pollution.In this paper,we proposed a methodological framework for assessing the spatial representativeness of the regional air quality monitoring network and applied it to ground-based PM_(2.5)observation in the mainland of China.Weighted multidimensional Euclidean distance between each pixel and the stations was used to determine the representativeness of the existing monitoring network.In addition,the K-means clustering method was adopted to improve the spatial representativeness of the existing AQMS.The results showed that there were obvious differences among the representative area of 1820 stations in the mainland of China.The monitoring stations could well represent the PM_(2.5)spatial distribution of the entire region,and the effectively represented area(i.e.the area where the Euclidean distance between the pixels and the stations was lower than the average value)accounted for 67.32%of the total area and covered 93.12%of the population.Forty additional stations were identified in the Northwest,North China,and Northeast regions,which could improve the spatial representativeness by 14.31%.Ling Su Chanchan Gao Xiaoli Ren Fengying Zhang Shanshan Cao Shiqing Zhang Tida Chen Mengqing Liu Bingchuan Ni Min Liu 2022Geoscience Frontiers2022,13,3:3
6Radio frequency energy regulates the multi-scale structure,digestive and physicochemical properties of rice starch显示文摘Radio frequency (RF) heating as an emerging technology was applied to regulate the structural,digestive and physicochemical properties of rice starch.In vitro digestibility results showed that RF treatment enhanced the resistant starch content and reduced the rapidly digestible starch content of rice starch,resulting in higher resistant to enzyme hydrolysis.Microstructure analysis indicated that RF treatment caused the granular surface erosions and morphology changes with increasing treatment time.RF treatment did not alter the A-type crystal form of starch,but disrupted the relative crystallinity,short-range molecular order,and lamellar structure in different degrees.Moreover,the DSC results suggested that starch orders with a higher thermal stability formed after RF treatment,thereby reducing the accessibility of starch granules to the enzyme.Furthermore,rapid viscosity analysis revealed that RF treatment significantly reduced the peak viscosity and breakdown of indica and japonica rice starch,while increased them in waxy rice starch.The rheological properties of rice starch were also changed after RF treatment.This work provides a theoretical basis for the application of RF technology in starch modification.Zhenna Zhang Mengqing Zhang Bin Zhang Yunyang Wang Wei Zhao 2022Food Bioscience2022,47,3:2
7Emergency laparoscopic pancreatoduodenectomy as treatment for pancreatic head cancer-induced acute gastrointestinal hemorrhage,safe or not?显示文摘We have read with great interests the article by Jin and colleagues entitled“Laparoscopic pancreaticoduodenectomy for pancreatic cancer:a hope or hype?”recently published in HepatoBiliary Surgery and Nutrition(1).They came out with a conclusion that Laparoscopic pancreaticoduodenectomy(LPD)could be a safe and feasible approach for the patients with pancreatic cancers even at their advanced stage,and may also obtain comparable long-term oncologic outcomes.We really agree with this conclusion.We would here also like to report one of our experiences of an emergency LPD case of the treatment of pancreatic head cancer induced acute gastrointestinal hemorrhage,which could be the first case to the best of our knowledge based on literature research.Mengqing Sun Yingxin Wei Shuo Li Ziwen Liu Xianlin Han 2021Hepatobiliary Surgery and Nutrition2021,10,1:2
8Effect of Dietary Vitamin E on the Sperm Quality of Turbot(Scophthalmus maximus)显示文摘A 3-month feeding experiment was conducted in an in-door seawater system to investigate the effect of dietary vitamin E(Ve) on the sperm quality of turbot(Scophthalmus maximus). D-α-tocopherol acetate was supplemented to the basal(control) diet(65.14 mg kg–1 Ve) to obtain low and high levels of dietary Ve(244.60 mg kg–1, LVe; 721.60 mg kg–1, HVe). Compared with the control, sperm concentration was significantly increased in Ve-supplemented groups(LVe and HVe); while relative sperm volume and testis-somatic index were significantly increased in group HVe only. Sperm motility duration was significantly longer in group HVe than in the control, but no significant difference was observed in percent motility among groups. Sperm size, the uniformity of mitochondrial size, and the integrity of mitochondria cristae and plasma membrane were improved by dietary Ve, especially in HVe. The content of Ve in testis and liver as well as polyunsaturated fatty acids in sperm increased with dietary Ve. These results suggested that dietary Ve, especially at the high level(721.60 mg kg–1), significantly improved sperm concentration and motility duration and maintained normal sperm morphology of turbot.XU Houguo HUANG Lina LIANG Mengqing ZHENG Keke WANG Xinxing 2015Journal of Ocean University of China2015,14,4:2
9Suppression of breast cancer invasion and migration by indole-3-carbinol:associated with up-regulation of BRCA1 and E-cadherin/catenin complexes显示文摘MengQ Qi M Chen DZ Yuan R Goldberg I D Rosen E M Auborn K Fan S J 2000J Mol Med2000,78,3:1
10Construction of cDNA Library from the Antenna of Chrysopa pallens(Rambur)显示文摘A full-length c DNA library from the antenna of Chrysopa pallens( Rambur) was constructed based on switching mechanism at 5’ end of RNA transcript( SMART) system. The purified double-stranded c DNA was ligated to vector SMART2 IFD,and transformed into Escherichia coli DH5ɑ by electroporation. The library constructed for female and male reached high titers of 2. 1 × 10~6 and 1. 8 × 10~6 pfu / m L,respectively. PCR results showed that the inserts varied from 400 bp to 2 000 bp with the average size larger than 500 bp and the recombination rate over 93. 0%. Further studies on those genes and large scale sequencing of the library may be helpful in screening new olfactory related genes in C. pallens.Wang Juan Zhang Lisheng Zhang Haiping Liu Chenxi Wang Mengqing Chen Hongyin 2015Plant Diseases and Pests2015,6,3:1
11Consecutive flap transfer for repairing massive soft tissue defects in the opisthenar with improved donor site closure显示文摘Wu Lehao Tong Dedi Zhu Shan Zang Mengqing Tian Guanglei Chen Shanlin 2014Chinese Journal of Traumatology2014,17,5:1
12A Linear Mixedeffects Model of Biomass and Volume of Trees Using Landsat ETM+- Images 显示文摘MengQ M Cieszewski C J Madden M 2007Forest Ecology and Management2007,244,13:1
13Free fatty acid receptor 2 promotes cardiomyocyte hypertrophy by activating STAT3 and GATA4显示文摘Free fatty acids(FFAs)play important roles in cardiovascular disease.Studies have shown that it is an important way for FAs to exert biological effects through their own receptors besides directly participating biochemical reaction in body.Free fatty acid receptor 2(FFA2)can be activated by short-chain FAs and is involved in inflammatory reactions and lipid accumulation.Since the known pathological changes caused by FFA2 are also implicated in cardiac hypertrophy,we hypothesized that FFA2 might be pathogenic in cardiac hypertrophy.This paper showed that FFA2 expression significantly increased in cardiac hypertrophy in vivo and in vitro.FFA2 agonist 4-CMTB or TUG-1375 promoted the expression of the hypertrophy markers ANF and BNP and increased cell surface area in vitro,which was further strengthened by FFA2 overexpression,suggesting that FFA2 might contribute to cardiomyocyte hypertrophy.Furthermore,4-CMTB treatment or FFA2 overexpression combined with 4-CMTB treatment elevated the phosphorylation and transcriptional activity of GATA4 and STAT3,which were inhibited by an ERK1/2 inhibitor,and GATA4 and STAT3 knockdown inhibited the elevation of hypertrophy biomarkers in cardiomyocytes treated with 4-CMTB.Taken together,these data indicate that FFA2 can enhance cardiomyocyte hypertrophy by activating STAT3 and GATA4 via ERK1/2,providing a potential new target for therapy.Hui Gao Kunming Tian Xiaojun Feng Mengqing Yan Chen Gao Yisheng Jiang Chenhao Zhu Huzhe Zhu Xueping Liu Yingfu Peng 2022Food Science and Human Wellness2022,11,2:1
14Development and simulated test of WEBSPC system显示文摘TanLi Mengqing Zhou Li Jiang Yongtao 2008Proceedings of IDMME2008,,10:1
15Piezo-actuated zona-drilling improves the fertilisation of OPS vitrified mouse oocytes显示文摘MengQ Li X Wu T 2007Acta Vet Hung2007,55,3:1
16The Cotton GhNHX1 Gene Encoding a Novel Putative Tonoplast Na^+/H^+ Antlporter Plays an Important Role in Salt Stress 显示文摘Wu C A Yang G D MengQ W 2004Plant Cell Physiol2004,45,5:1
174-(Trifluoromethyl)-benzonitrile: A novel electrolyte additive for lithium nickel manganese oxide cathode of high voltage lithium ion battery显示文摘Wenna Huang Lidan Xing Yating Wang Mengqing Xu Weishan Li Fengchao Xie Shengan Xia 2014Journal of Power Sources2014,,:1
18Structure and Growth Mechanism of V/Ag Multilayers with Different Periodic Thickness Fabricated by Magnetron Sputtering Deposition显示文摘Hongxiu Zhang Feng Ren Mengqing Hong Xiangheng Xiao Guangxu Cai Changzhong Jiang 2013Journal of Materials Science & Technology2013,,:1
19Realignment of in-centives for health-care providers in China 显示文摘Yip WC-M HsiaoWC MengQ 2010Lancet20102010,,:1
20显示文摘MengQS FanW H ChenRX 2010J of Alloys and Comp2010,492,:1
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