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1Mesoproterozoic age for Xiamaling Formation in North China Plate indicated by zircon SHRIMP dating显示文摘Zircon grains of magmatic origin from tuffite layers in the Xiamaling Formation at Zhaojiashan Village, Xuanhua area, Hebei Province, were used for zircon dating with a Sensitive High-Resolution Ion Microprobe (SHRIMP II), which gives a weighted mean 207Pb/206Pb age of 1366±9 Ma. It shows a very similar age (1368±12 Ma) as the zircon dating from the Xiamaling Formation in Western Hill, Beijing. This age proposes that the Xiamaling Formation in the North China plate should be of Mesoproterozoic, instead of Neoproterozoic based on K-Ar, Ar-Ar dating. The new zircon age also indicates the devel- opment of macrofossils algae from the Mesoproterozoic age.GAO LinZhi ZHANG ChuanHeng SHI XiaoYing SONG Biao WANG ZiQiang LIU YaoMing 2008Chinese Science Bulletin2008,53,17:68
2Soybean GmMYB76, GmMYB92, and GmMYB177 genes confer stress tolerance in transgenic Arabidopsis plants显示文摘MYB 类型抄写因素包含保存 MYB 约 50 氨基酸的 DNA 有约束力的领域并且涉及植物生长,开发,新陈代谢和应力的许多方面的规定回答。从大豆植物,我们识别了 156 GmMYB 基因用我们的以前获得了 206 MYB unigenes,并且 48 被发现有全身的开读物的框架。所有这些识别基因的表情被检验,并且我们发现 43 基因的表情与骆驼毛的织物,盐,干旱或冷应力在处理之上被改变。三 GmMYB 基因, GmMYB76, GmMYB92 和 GmMYB177,为进一步的分析被选择。用酵母试金系统, GmMYB76 和 GmMYB92 被发现有 transactivation 活动和罐头形式 homodimers。GmMYB177 不看起来举办 transactivation 活动,但是能与 GmMYB76 形成 heterodimers。酵母一个混血儿试金表明三 GmMYBs 能绑在 cis 元素的所有梭织 AAC GGT TTT TT 和 CCG GAA AAA AGG 在,但是与不同亲密关系,并且 GmMYB92 能也绑在 TCT CAC CTA CC。转基因的 Arabidopsis 植物 overexpressing GmMYB76 或 GmMYB177 在盐和结冰忍耐比 GmMYB92 转基因的植物显示出更好的性能。然而,这些转基因的植物与野类型的植物比较在萌芽舞台展出了减少的敏感到骆驼毛的织物处理。三 GmMYB 基因差别除了他们压力应答的基因的一个普通子集的规定影响了压力应答的基因的一个子集。这些结果显示三 GmMYB 基因可以在压力忍耐起微分作用,可能通过压力应答的基因的规定。Yong Liao Hong-Feng Zou Hui-Wen Wang Wan-Ke Zhang Biao Ma Jin-Song Zhang Shou-Yi Chen 2008Cell Research2008,18,10:70
3Spatial Distribution of Heavy Metals in Agricultural Soils of an Industry-Based Peri-Urban Area in Wuxi, China显示文摘In industry-oriented peri-urban areas, the heavy metal accumulation in soils caused by industrialization has become a potential threat. The top soil samples from 27 paddy fields and 75 vegetable fields were collected from a typical industry-based peri-urban area of about 8 km2 in Wuxi, China, to study the accumulation and distribution of As, Hg, Cu, Zn, Pb, Cr, and Cd in comparison with heavy metal contents in soils near developed industrial sites (Guangzhou, China; Wallsend Burn of Tyneside, UK; and Osnabriick, Germany). Kriging interpolation was used to determine the metals' spatial distribution. The results showed that most soils, compared to the background values, contained elevated contents of As, Hg, Cu, Zn, and Pb with some having elevated contents of Cd and Cr. Except for less than 10% of the soil samples of Cu, Zn and Cd contents, these heavy metal contents were lower than the soil threshold levels of the Grade II criteria for the Chinese environmental quality standard. Probably, because of the scattered distribution and diversity of industries in the study area, spatial distributions of these heavy metals from Kriging interpolation indicated little similarity. Nevertheless, when compared with other areas in the Taihu Lake region, mean contents of Cu, Zn, Pb, and Cd were relatively high in the Wuxi peri-urban area. Additionally, compared to soils in agricultural areas around Guangzhou, Osnabriick, or Wallsend Burn, contents of most heavy metals in soils from this area were lower.ZHAO Yan-Feng SHI Xue-Zheng HUANG Biao YU Dong-Sheng WANG Hong-Jie SUN Wei-Xia I. OEBOERN K. BLOMBACK 2007Pedosphere2007,17,1:49
4Zircon U-Pb dating for the earliest Neoproterozoic mafic magmatism in the southern margin of the North China Block显示文摘Huge diabase occurs within the Pro- terozoic strata in the southern margin of the North China Block, geographically in the northern parts of Anhui and Jiangsu provinces, where no strata younger than Neoproterozoic have been found. Zir- cons from the diabase show three different structures from cathodoluminesecence imaging, but they are all of magmatic origin. SHRIMP U-Pb dating yields a range of 206Pb/238U ages from 2600 to 124 Ma, but two geological events can clearly be identified from both concordant and discordant ages. One gives two weighted mean 207Pb/206Pb ages of 976 ± 24 and 1038 ± 26 Ma which are interpreted as timing of dia- base crystallization, and the other has a weighted mean 207Pb/206Pb age of 2523 ± 52 Ma that repre- sents formation time of inherited zircon from the old crust. The dating results indicate that the mafic magmatic event occurred in a transition period from the latest Mesoproterozoic to the earliest Neopro- terozoic, consistent with global subduction of Grenvill ocean crust to result in the assembly of superconti- nent Rodinia. Therefore, the North China Block needs to be taken into account when reconstructing the position of China continents within the framework of Rodinia supercontinent.LIU Yongqing GAO Linzhi LIU Yanxue SONG Biao WANG Zongxiu 2006Chinese Science Bulletin2006,51,19:36
5Terrestrial carbon sinks in China and around the world and their contribution to carbon neutrality显示文摘Enhancing the terrestrial ecosystem carbon sink(referred to as terrestrial C sink) is an important way to slow down the continuous increase in atmospheric carbon dioxide(CO_(2)) concentration and to achieve carbon neutrality target.To better understand the characteristics of terrestrial C sinks and their contribution to carbon neutrality,this review summarizes major progress in terrestrial C budget researches during the past decades,clarifies spatial patterns and drivers of terrestrial C sources and sinks in China and around the world,and examines the role of terrestrial C sinks in achieving carbon neutrality target.According to recent studies,the global terrestrial C sink has been increasing from a source of (-0.2±0.9) Pg C yr^(-1)(1 Pg=1015g)in the 1960s to a sink of (1.9±1.1) Pg C yr^(-1) in the 2010s.By synthesizing the published data,we estimate terrestrial C sink of 0.20–0.25 Pg C yr^(-1) in China during the past decades,and predict it to be 0.15–0.52 Pg C yr^(-1) by 2060.The terrestrial C sinks are mainly located in the mid-and high latitudes of the Northern Hemisphere,while tropical regions act as a weak C sink or source.The C balance differs much among ecosystem types:forest is the major C sink;shrubland,wetland and farmland soil act as C sinks;and whether the grassland functions as C sink or source remains unclear.Desert might be a C sink,but the magnitude and the associated mechanisms are still controversial.Elevated atmospheric CO_(2) concentration,nitrogen deposition,climate change,and land cover change are the main drivers of terrestrial C sinks,while other factors such as fires and aerosols would also affect ecosystem C balance.The driving factors of terrestrial C sink differ among regions.Elevated CO_(2) concentration and climate change are major drivers of the C sinks in North America and Europe,while afforestation and ecological restoration are additionally important forcing factors of terrestrial C sinks in China.For future studies,we recommend the necessity for intensive and long-term ecosystem C monitoring over broad geographic scale to improve terrestrial biosphere models for accurately evaluating terrestrial C budget and its dynamics under various climate change and policy scenarios.Yuanhe Yang Yue Shi Wenjuan Sun Jinfeng Chang Jianxiao Zhu Leiyi Chen Xin Wang Yanpei Guo Hongtu Zhang Lingfei Yu Shuqing Zhao Kang Xu Jiangling Zhu Haihua Shen Yuanyuan Wang Yunfeng Peng Xia Zhao Xiangping Wang Huifeng Hu Shiping Chen Mei Huang Xuefa Wen Shaopeng Wang Biao Zhu Shuli Niu Zhiyao Tang Lingli Liu Jingyun Fang 2022Science China(Life Sciences)2022,65,5:32
6High-entropy ceramics:Present status,challenges,and a look forward显示文摘High-entropy ceramics (HECs) are solid solutions of inorganic compounds with one or more Wyckoff sites shared by equal or near-equal atomic ratios of multi-principal elements.Although in the infant stage,the emerging of this new family of materials has brought new opportunities for material design and property tailoring.Distinct from metals,the diversity in crystal structure and electronic structure of ceramics provides huge space for properties tuning through band structure engineering and phonon engineering.Aside from strengthening,hardening,and low thermal conductivity that have already been found in high-entropy alloys,new properties like colossal dielectric constant,super ionic conductivity,severe anisotropic thermal expansion coefficient,strong electromagnetic wave absorption,etc.,have been discovered in HECs.As a response to the rapid development in this nascent field,this article gives a comprehensive review on the structure features,theoretical methods for stability and property prediction,processing routes,novel properties,and prospective applications of HECs.The challenges on processing,characterization,and property predictions are also emphasized.Finally,future directions for new material exploration,novel processing,fundamental understanding,in-depth characterization,and database assessments are given.Huimin XIANG Yan XING Fu-zhi DAI Hongjie WANG Lei SU Lei MIAO Guojun ZHANG Yiguang WANG Xiwei QI Lei YAO Hailong WANG Biao ZHAO Jianqiang LI Yanchun ZHOU 2021Journal of Advanced Ceramics2021,10,3:28
7Cytological, physiological, and transcriptomic analyses of golden leaf coloration in Ginkgo biloba L显示文摘Ginkgo biloba is grown worldwide as an ornamental plant for its golden leaf color.However,the regulatory mechanism of leaf coloration in G.biloba remains unclear.Here,we compared G.biloba gold-colored mutant leaves and normal green leaves in cytological,physiological and transcriptomic terms.We found that chloroplasts of the mutant were fewer and smaller,and exhibited ruptured thylakoid membranes,indistinct stromal lamellae and irregularly arranged vesicles.Physiological experiments also showed that the mutant had a lower chlorophyll,lower flavonoid and higher carotenoid contents(especially lutein).We further used transcriptomic sequencing to identify 116 differentially expressed genes(DEGs)and 46 transcription factors(TFs)involved in chloroplast development,chlorophyll metabolism,pigment biosynthesis and photosynthesis.Among these,the chlorophyll biosynthesis-related PPO showed down-regulation,while chlorophyll degradation-related NYC/NOL had up-regulated expression in mutant leaves.Z-ISO,ZDS,and LCYE,which are involved in carotenoid biosynthesis were up-regulated.Quantitative real-time PCR(RT-qPCR)further confirmed the altered expression levels of these genes at three stages.The alteration of PPO and NYC/NOL gene expression might affect chlorophyll biosynthesis and promote degradation of chlorophyll b to chlorophyll a,while the up-regulated genes Z-ISO,ZDS and LCYE enhanced carotenoid accumulation.Consequently,changes in the ratio of carotenoids to chlorophylls were the main factors driving the golden leaf coloration in the mutant G.biloba.Wei-xing Li Shun-bo Yang Zhaogeng Lu Zhi-chong He Yun-ling Ye Bei-bei Zhao Li Wang Biao Jin 2018Horticulture Research2018,5,1:28
8Regulating effects of arsenic trioxide on cell death pathways and inflammatory reactions of pancreatic acinar cells in rats显示文摘背景煽动性的 cytokines 在尖锐胰腺炎的发展起一个关键作用,这被接受,那么堵住煽动性的反应的开始可以减轻尖锐胰腺炎的病理学的变化。我们在 vitro 在胰腺的 acinar 房间的 apoptosis 和 oncosis 上学习了砷三氧化物(As2O3 ) 的规章的效果,在尖锐 pancreatitis.Methods 上的 vivo 和它的治疗学的效果,胰腺的 acinar 房间被 collagenase 消化方法孤立。孤立的胰腺的 acinar 房间的 Apoptosis 和 oncosis 与 Hoechst 33258+PI 或 Annexin V+PI 被检测两倍荧光灯的染色。淀粉酶并且喂奶脱氢酶版本被测量。尖锐胰腺炎被 caerulein 的 intraperitoneal 注射在 Wistar 老鼠导致,并且 apoptosis 与把方法标记的终端 dUTP 刻痕结束被检测。肿瘤 necorsis 因素(TNF-) mRNA, myeloperoxidase,原子 factor-B 并且胰腺的损坏的组织学的分级是在那里的 measured.Results 是增加的 apoptosis 但是在有 As2O3 的处理以后的胰腺的 acinar 房间的减少的 oncosis。层次喂奶脱氢酶和淀粉酶版本显著地在在对待的 As2O3 的对待的 group.Myeloperoxidase 内容,TNF- mRNA 水平,原子 factor-B 激活和病理学的分数组织的 As2O3 被减少比在未经治疗的 group.Conclusions As2O3 能导致 apoptosis 和胰腺的 acinar 的还原剂 oncosis 的显著地低房间,因此导致 acinar 房间的 endocellular 酶的减少的版本,减少了煽动性的房间渗入并且减少 inflammaXUE Dong-bo ZHANG Wei-hui YUN Xiao-guang SONG Chun ZHENG Biao SHI Xing-ye WANG Hai-yang 2007Chinese Medical Journal2007,,8:26
9Chinese Trauma Surgeon Association for management guidelines of vacuum sealing drainage application in abdominal surgeries-Update and systematic review显示文摘Vacuum sealing drainage (VSD) is frequently used in abdominal surgeries. However, relevant guidelines are rare. Chin ese Trauma Surge on Associati on orga nized a committee composed of 28 experts across China in July 2017, aiming to provide an evidence-based recommendation for the application of VSD in abdominal surgeries.Eleven questions regarding the use of VSD in abdominal surgeries were addressed:(1) which type of materials should be respectively chosen for the intraperitoneal cavity, retroperitoneal cavity and superficial incisions?(2) Can VSD be preventively used for a high-risk abdominal incision w让h primary suture?(3) Can VSD be used in severely contaminated/infected abdominal surgical sites?(4) Can VSD be used for temporary abdominal cavity closure under some special conditions such as severe abdominal trauma, infection, liver transplantation and intra-abdominal volume increment in abdominal compartment syndrome?(5) Can VSD be used in abdominal organ inflammation, injury, or postoperative drainage?(6) Can VSD be used in the treatment of intestinal fistula and pancreatic fistula?(7) Can VSD be used in the treatment of intra-abdominal and extra-peritoneal abscess?(8) Can VSD be used in the treatment of abdominal wall wounds, wound cavity, and defects?(9) Does VSD in crease the risk of bleeding?(10) Does VSD increase the risk of intestinal wail injury?(11) Does VSD increase the risk of peritoneal adhesion? Focusing on these questions, evidence-based recommendations were given accordingly. VSD was strongly recommended regarding the questions 2-4. Weak recommendations were made regarding questions 1 and 5-11. Proper use of VSD in abdominal surgeries can lower the risk of infection in abdominal incisions with primary suture, treat severely contaminated/infected surgical sites and facilitate temporary abdominal cavity closure.Yang Li Pei-Yuan Li Shi-Jing Sun Yuan-Zhang Yao Zhan-Fei Li Tao Liu Fan Yang Lian-Yang Zhang Xiang-Jun Bai Jing-Shan Huo Wu-Bing He Jun Ouyang Lei Peng Ping Hu Yan-An Zhu Ping Jin Qi-Feng Shao Yan-Feng Wang Rui-Wu Dai Pei-Yang Hu Hai-Ming Chen Ge-Fei Wang Yong-Gao Wang Hong-Xu Jin Chang-Ju Zhu Qi-Yong Zhang Biao Shao Xi-Guang Sang Chang-Lin Yin 2019Chinese Journal of Traumatology2019,22,1:26
10A review of transient flow structure and unsteady mechanism of cavitating flow显示文摘The flow structure and the unsteady mechanism of the unsteady cavitating flow are reviewed in this paper. The flow patterns and structures in different cavitation regime, for the attached cavitation and the vortical cavitation, are shown with both the visualization and the quantitative information. The attached cavitating flow around the Clark-Y hydrofoil and the vortical cavitating flow around the Tulin hydrofoil are considered. In particular, the phenomena such as the large-scale vortex structure and the re-entrant flow associated with the cloud cavitation, and the cavitating vortex street's forming and crumbling are described. The evolution of the cavitation structure in the transient sheet/cloud cavity forming, along with the cavity collapse induced by the re-entrant flow and the shock wave propagation are discussed. The perspective future research of higher fidelity simulations, and the accurate identifications of the cavitating vortex structure is commented.Biao Huang Si-cong Qiu Xiang-bin Li Qin Wu Guo-yu Wang 2019Journal of Hydrodynamics2019,31,3:24
11Experimental and numerical investigation of unsteady cavitating flows through a 2D hydrofoil显示文摘In the present study, firstly, the unsteady cavitating flows around a hydrofoil are studied based on the flow visualization and detail velocity measurement, a high-speed video camera is used to visualize the flow structures, and a particle image velocimetry (PIV) technique is applied to the measurement of the time-averaged and instantaneous velocity and vorticity fields. The results show that the unsteadiness of mass transfer process between the vapor and the two-phase regions is substantial, a self-oscillatory behavior of the whole sheet cavitation is obtained, with large length fluctuations and vapor cloud shedding, and also the cavitation structure depends on the interaction of the water-vapor mixture and the periodic vortex shedding. The main purpose of this experimental study is to offer information for validating computational models, and shed light on the unsteady multiphase transport process of cavitating flows. Furthermore, with an emphasis on the dynamics of the attached turbulent cavitating flows, a filter-based model (FBM) is derived from the ktwo-equation model, a conditional averaging method aimed at improving unsteady simulation is applied to computation. In comparison to the standard kmodel, overall, the filter-based model is shown to improve the predictive capability considerably.HUANG Biao WANG GuoYu 2011Science China(Technological Sciences)2011,54,7:23
12Long-term results of endovascular therapy for proximal subclavian arterial obstructive lesions显示文摘背景 Endovascular 治疗是为锁骨下的动脉的局部性的吸藏的一种处理选择。在与 59 个病人一起的长期的经验是在1998年6月和2008年9月之间的 presented.Methods 的这份报告,我们使用了 endovascular 治疗在 59 个病人对待 61 锁骨下的动脉的妨碍的损害( 46 男性和 13 女性,有一个平均数的 34-82 岁变老( 61.9 眠瑩?佃??????????????WANG Ke-qin WANG Zhong-gao YANG Bao-zhong YUAN Chao ZHANG Wang-de YUAN Biao XING Tong SONG Sheng-han LI Tan LIAO Chuan-jun ZHANG Yang 2010Chinese Medical Journal2010,,1:21
13Measurement of Local Gravity via a Cold Atom Interferometer显示文摘ZHOU Lin 2011Chinese Physics Letters2011,28,1:21
14Forest Ecosystem Services and Their Values in Beijing显示文摘As the most important ecosystem in Beijing, the forest supports a lot of ecosystem services to local and around communities, which plays a key role in the maintenance of urban ecological security.However, the valuation on the forest ecosystem services based on regional scale could not provide precise and reasonable values for forestry sector management.In this study, we estimated the magnitudes and economic values of the forest ecosystem services in Beijing at sublot level.The economic value of forest ecosystem services in Beijing was estimated to be 19 339.71×10 6 yuan(RMB) in 2004.Among all the ecosystem services indicators we estimated in this study, only fruit, timber and part of the recreation(which only include the tourism income from the forest parks and scenic areas, but not include that from other forest types) were measured in the social economic system.As estimated in this study, more than 82.19% of the economic value of forest ecosystem services could not be measured in the socio-economic statistical system.The importance of forest ecosystem services in Beijing to human welfare was underestimated by the socio-economic system.Therefore, the policies about the eco-compensation of forest ecosystem services should be established to maintain the sustainable supply of the forest ecosystem services in Beijing.XIE Gaodi LI Wenhua XIAO Yu ZHANG Biao LU Chunxia AN Kai WANG Jixing XU Kang WANG Jinzeng 2010Chinese Geographical Science2010,20,1:18
15Carbon budgets of three temperate forest ecosystems in Dongling Mt.,Beijing,China显示文摘There is a general agreement that forest ecosystems in the Northern Hemisphere function as signifi-cant sinks for atmospheric CO2; however, their magnitude and distribution remain large uncertainties. In this paper, we report the carbon (C) stock and its change of vegetation, forest floor detritus, and mineral soil, annual net biomass increment and litterfall production, and respiration of vegetation and soils between 1992 to 1994, for three temperate forest ecosystems, birch (Betula platyphylla) forest, oak (Quercus liaotungensis) forest and pine (Pinus tabulaeformis) plantation in Mt. Dongling, Beijing, China. We then evaluate the C budgets of these forest ecosystems. Our results indicated that total C density (organic C per hectare) of these forests ranged from 250 to 300 t C ha-1, of which 35―54 t C ha-1 from vegetation biomass C and 209―244 t C ha-1 from soil organic C (1 m depth, including forest floor detritus). Biomass C of all three forests showed a net increase, with 1.33―3.55 t C ha-1 a-1 during the study period. Litterfall production, vegetation autotrophic respiration, and soil heterotrophic respira-tion were estimated at 1.63―2.34, 2.19―6.93, and 1.81―3.49 t C ha-1 a-1, respectively. Ecosystem gross primary production fluctuated between 5.39 and 12.82 t C ha-1 a-1, about half of which (46%―59%, 3.20―5.89 t C ha-1 a-1) was converted to net primary production. Our results suggested that pine forest fixed C of 4.08 t ha-1 a-1, whereas secondary forests (birch and oak forest) were nearly in balance in CO2 exchange between the atmosphere and ecosystems.FANG JingYun LIU GuoHua ZHU Biao WANG XiaoKe LIU ShaoHui 2007Science China Earth Sciences2007,50,1:17
16Endoscopic retrograde cholangiopancreatography in children with symptomatic pancreaticobiliary maljunction: A retrospective multicenter study显示文摘BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)has been widely used in pediatric patients with cholangiopancreatic diseases.AIM To evaluate the efficacy,safety,and long-term follow-up results of ERCP in symptomatic pancreaticobiliary maljunction(PBM).METHODS A multicenter,retrospective study was conducted on 75 pediatric patients who were diagnosed with PBM and underwent therapeutic ERCP at three endoscopy centers between January 2008 and March 2019.They were divided into four PBM groups based on the fluoroscopy in ERCP.Their clinical characteristics,specific ERCP procedures,adverse events,and long-term follow-up results were retrospectively reviewed.RESULTS Totally,112 ERCPs were performed on the 75 children with symptomatic PBM.Clinical manifestations included abdominal pain(62/75,82.7%),vomiting(35/75,46.7%),acholic stool(4/75,5.3%),fever(3/75,4.0%),acute pancreatitis(47/75,62.7%),hyperbilirubinemia(13/75,17.3%),and elevated liver enzymes(22/75,29.3%).ERCP interventions included endoscopic sphincterotomy,endoscopic retrograde biliary or pancreatic drainage,stone extraction,etc.Procedure-related complications were observed in 12 patients and included post-ERCP pancreatitis(9/75,12.0%),gastrointestinal bleeding(1/75,1.3%),and infection(2/75,2.7%).During a mean follow-up period of 46 mo(range:2 to 134 mo),ERCP therapy alleviated the biliary obstruction and reduced the incidence of pancreatitis.The overall effective rate of ERCP therapy was 82.4%;seven patients(9.3%)were lost to follow-up,eight(11.8%)re-experienced pancreatitis,and eleven(16.2%)underwent radical surgery,known as prophylactic excision of the extrahepatic bile duct and hepaticojejunostomy.CONCLUSION ERCP is a safe and effective treatment option to relieve biliary or pancreatic obstruction in symptomatic PBM,with the characteristics of minor trauma,fewer complications,and repeatability.Jing-Qing Zeng Zhao-Hui Deng Kai-Hua Yang Tian-Ao Zhang Wen-Yu Wang Jian-Mei Ji Ya-Bin Hu Chun-Di Xu Biao Gong 2019World Journal of Gastroenterology2019,25,40:17
17An R2R3-type transcription factor gene AtMYB59 regulates root growth and cell cycle progression in Arabidopsis显示文摘MYB 蛋白质在真核细胞的有机体起重要作用。在植物, R1R2R3 类型 MYB 蛋白质在房间周期控制工作。然而, R2R3 类型 MYB 蛋白质是否也涉及房间部门过程,仍然保持未知。这里,我们报导那 R2R3 类型抄写因素基因, AtMYB59,涉及房间周期前进和根生长的规定。AtMYB59 蛋白质在洋葱的原子核是局部性的表皮的房间并且 transactivation 活动。在酵母房间的 AtMYB59 的表示压制房间增长,和 transformants 与更长的房间有更多的原子核和更高的 aneuploid DNA 内容。在 AtMYB59 的保存领域的变化在酵母细胞生长上废除它的效果。在同步 Arabidopsis 房间暂停, AtMYB59 基因明确地在房间周期前进期间在 S 阶段被表示。表示和 promoter-GUS 分析表明 AtMYB59 基因富有地在根被表示。转基因的植物 overexpressing AtMYB59 更短的根与野类型的植物(Arabidopsis 就职 Col-0 ) 相比,并且在在根尖端的有丝分裂的房间的一半附近在中期。相反地,空变异的 myb59-1 比关口在中期让更长的根和更少有丝分裂的房间,建议那 AtMYB59 可以由扩大有丝分裂的房间的中期禁止根生长。AtMYB59 调整许多下游的基因,包括 CYCB1; 1 基因,可能通过到 MYB 应答的元素的绑定。这些结果在细胞周期规定和植物根生长为 AtMYB59 支持一个角色。Rui-Ling Mu Yang-Rong Cao Yun-Feng Liu Gang Lei Hong-Feng Zou Yong Liao Hui-Wen Wang Wan-Ke Zhang Biao Ma Ji-Zhou Du Ming Yuan Jin-Song Zhang Shou-Yi Chen 2009Cell Research2009,19,11:16
18Coping as a Mechanism Linking Stressful Life Events and Mental Health Problems in Adolescents显示文摘Objective Although stressful life events represent an etiologic factor of mental health problems in adolescents,few studies have been conducted to address mechanisms linking the stress‐psychopathology relation.The present study was designed to examine coping as a mediate factor on the relationship between stressful life events and symptoms of anxiety and depression.Methods The participants were 13 512 students from eight cities of China,who participated in a school‐based survey.Data were collected by a questionnaire comprising coping,stressful life events,anxiety,and depressive symptoms.As a model,a series of regression equations were used to examine whether coping mediated the association between stressful life events and symptoms of anxiety and depression.Results Each dimension of stressful life events showed significant correlation with anxiety,depression and coping (all P<0.001).In the model to analyze mediate effects,all standardized coefficients (β) were significant (all P<0.01),indicating marked mediator effects.Furthermore,negative coping might account for more mediate effects than positive coping on this relationship.Conclusion Coping partially mediated the relationship between stressful life events and mental health during adolescence.This study highlighted an important public health priority for preventive interventions targeting stress‐related psychopathology,and for further promoting adolescents'mental health.MENG Xiu Hong TAO Fang Biao WAN Yu Hui HU Yan WANG Ren Xi 2011Biomedical and Environmental Sciences2011,24,6:16
19ZmMs30 Encoding a Novel GDSL Lipase Is Essential for Male Fertility and Valuable for Hybrid Breeding in Maize显示文摘Genic male sterility (GMS) is very useful for hybrid vigor utilization and hybrid seed production. Although a large number of GMS genes have been identified in plants, little is known about the roles of GDSL lipase members in anther and pollen development. Here, we report a maize GMS gene, ZmMs30, which encodes a novel type of GDSL lipase with diverged catalytic residues. Enzyme kinetics and activity assays show that ZmMs30 has lipase activity and prefers to substrates with a short carbon chain. ZmMs30 is specifically expressed in maize anthers during stages 7-9. Loss of ZmMs30 function resulted in defective anther cuticle, irregular foot layer of pollen exine, and complete male sterility. Cytological and lipidomics analyses demonstrate that ZmMs30 is crucial for the aliphatic metabolic pathway required for pollen exine formation and anther cuticle development. Furthermore, we found that male sterility caused by loss of ZmMs30 function was stable in various inbred lines with different genetic background, and that it didn't show any negative effect on maize heterosis and production, suggesting that ZmMs30 is valuable for crossbreeding and hybrid seed production. We then developed a new multi-control sterility system using ZmMs30 and its mutant line, and demonstrated it is feasible for generating desirable GMS lines and valu. able for hybrid maize seed production. Taken together, our study sheds new light on the mechanisms of anther and pollen development, and provides a valuable male-sterility system for hybrid breeding maize.Xueli An Zhenying Dong Youhui Tian Ke Xie Suowei Wu Taotao Zhu Danfeng Zhang Van Zhou Canfang Niu Biao Ma Quancan Hou Jianxi Bao Simiao Zhang Ziwen Li Yanbo Wang Tingwei Yan Xiaojing Sun Yuwen Zhang Jinping Li Xiangyuan Wan 2019Molecular Plant2019,12,3:15
20Endoscopic Palliative Treatment for Malignant Obstructive Jaundice: A Report of 929 Cases显示文摘Objective:To review the experience with endoscopic palliative treatment for malignant obstructive jaundice (MOJ) in 929 patients. Methods:929 patients (598 males and 331 females) underwent 1215 endoscopic palliative drainages for MOJ in our hospital. Tumor obstruetion oeeurred in the distal common bile duet(CBD)(263 patients), the middle CBD (43),and the hilum(909).The mean bilirubin level was 284.3 μmol/L(range 26-810). Of the 1215 drainages, 599 were performed by stenting with plastic endoprosthesis, 385 by naso-biliary eatheterization, 167 by expandable metal stents,39 by combined drainage method,19 by tumor sphincterotomy and 6 by endoseopie fistulostomy. Results:The successful rate of endoscopic procedure was 94.3%. The jaundice symptom was improved in 81.8% of the patients with a significant reduetion of serum bilirubin in 64.7%. The complication after treatment occurred in 23 eases (2.6%), including eholangitis(23 eases), panereatitis (8 eases), and bleeding (one ease), and 3 eases were dead (0.2%).The median survival time of all patients was 14 months and life time analysis showed a life expectancy of 75.9%, 44.0% and 25.2% at 1, 2 and 3 years respectively. Conclusion:In the patients with MOJ seeondary to panereatobiliary malignancy, sueeessful endoscopic drainage provides adequate relief of biliary obstruetion and is associated with low morbidity and mortality. Enduseopie interventional treatment may be considered as an alternative of palliative biliary operation for the late stage of pancreatic and biliary malignaneies.HU Bing, ZHOU Daiyun, GONG Biao, WANG Shuzhi, WU Mengchao Eastern Hepatohiliary Surgery Hospital, Second Military Medical University Shanghai 200438, China 2002The Chinese-German Journal of Clinical Oncology2002,1,1:15
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