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1Identification of a novel coronavirus causing severe pneumonia in human:a descriptive study显示文摘Background:Human infections with zoonotic coronaviruses(CoVs),including severe acute respiratory syndrome(SARS)-CoV and Middle East respiratory syndrome(MERS)-CoV,have raised great public health concern globally.Here,we report a novel batorigin CoV causing severe and fatal pneumonia in humans.Methods:We collected clinical data and bronchoalveolar lavage(BAL)specimens from five patients with severe pneumonia from Wuhan Jinyintan Hospital,Hubei province,China.Nucleic acids of the BAL were extracted and subjected to next-generation sequencing.Virus isolation was carried out,and maximum-likelihood phylogenetic trees were constructed.Results:Five patients hospitalized from December 18 to December 29,2019 presented with fever,cough,and dyspnea accompanied by complications of acute respiratory distress syndrome.Chest radiography revealed diffuse opacities and consolidation.One of these patients died.Sequence results revealed the presence of a previously unknownβ-CoV strain in all five patients,with 99.8%to 99.9%nucleotide identities among the isolates.These isolates showed 79.0%nucleotide identity with the sequence of SARS-CoV(GenBank NC_004718)and 51.8%identity with the sequence of MERS-CoV(GenBank NC_019843).The virus is phylogenetically closest to a bat SARS-like CoV(SL-ZC45,GenBank MG772933)with 87.6%to 87.7%nucleotide identity,but is in a separate clade.Moreover,these viruses have a single intact open reading frame gene 8,as a further indicator of bat-origin CoVs.However,the amino acid sequence of the tentative receptor-binding domain resembles that of SARS-CoV,indicating that these viruses might use the same receptor.Conclusion:A novel bat-borne CoV was identified that is associated with severe and fatal respiratory disease in humans.Li-Li Ren Ye-Ming Wang Zhi-Qiang Wu Zi-Chun Xiang Li Guo Teng Xu Yong-Zhong Jiang Yan Xiong Yong-Jun Li Xing-Wang Li Hui Li Guo-Hui Fan Xiao-Ying Gu Yan Xiao Hong Gao Jiu-Yang Xu Fan Yang Xin-Ming Wang Chao Wu Lan Chen Yi-Wei Liu Bo Liu Jian Yang Xiao-Rui Wang Jie Dong Li Li Chao-Lin Huang Jian-Ping Zhao Yi Hu Zhen-Shun Cheng Un-Lin Liu Zhao-Hui Qian Chuan Qin Qi Jin Bin Cao Jian-Wei Wang 2020Chinese Medical Journal2020,,9:99
2Crustal velocity structure in the Emeishan large igneous province and evidence of the Permian mantle plume activity显示文摘The Emeishan large igneous province(ELIP) in SW China is interpreted to be associated with an ancient mantle plume. Most of the constraints on the role of mantle plume in the generation of the Emeishan flood basalts were provided by geological and geochemical methods, but the geophysical investigation is very limited. In order to better understand the deep structure and features of ELIP, we have studied the crustal velocity structure using the data acquired from the Lijiang-Panzhihua-Qingzhen wide-angle seismic profile. This profile crosses the three sub-zones of the ELIP(the inner, intermediate, and outer zones), divided based on the differential erosion and uplift of the Maokou limestone. The results provided by the active source seismic experiment demonstrate:(1) The average depth of the crystalline basement along the profile is about 2 km.(2) The middle crust in the Inner Zone is characterized by high-velocity anomalies, with the average velocity of 6.2-6.6 km/s, which is about 0.1– 0.2 km/s higher than the normal one. The velocity of the lower crust in the inner zone is 6.9-7.2 km/s, higher than those observed in the intermediate and outer zones(6.7-7.0 km/s). Relatively low velocity anomalies appear in the upper, middle and lower crusts near the junction of the inner zone and intermediate zone, probably due to the effect of the Xiaojiang fault(XJF).(3) The average velocity of the crust is comparatively low on both sides of XJF, especially on the east side, and the average velocity of the consolidated continental crust is also low there. This may suggest that the XJF extends at least down to 40 km deep, even beyond through the crust.(4) The depth to the Moho discontinuity decrease gradually from 47-53 km in the inner zone, via 42-50 km in the intermediate zone to 38-42 km in the outer zone. In the inner zone, the Moho uplifts locally and the(consolidated) crust is characterized by high-velocity anomalies, which are likely related to intensive magma intrusion and underplating associated with melting of plume head. Overall the crustal velocity structure in the study area recorded the imprint left by the Permian Emeishan mantle plume.XU Tao ZHANG ZhongJie LIU BaoFeng CHEN Yun ZHANG MingHui TIAN XiaoBo XU YiGang TENG JiWen 2015Science China Earth Sciences2015,58,7:36
3Gd-EOB-DTPA-enhanced magnetic resonance imaging for focal liver lesions in Chinese patients:a multicenter,open-label,phase Ⅲ study显示文摘BACKGROUND:Contrast agents help to improve visibility in magnetic resonance(MR)imaging.However,owing to the large interstitial spaces of the liver,there is a reduction in the natural contrast gradient between lesions and healthy tissue.This study was undertaken to evaluate the efficacy and safety of the liverspecific MR imaging contrast agent gadoxetate disodium(GdEOB-DTPA)in Chinese patients.METHODS:This was a single-arm,open-label,multicenter study in patients with known or suspected focal liver lesions referred for contrast-enhanced MR imaging.MR imaging was performed in 234 patients before and after a single intravenous bolus of Gd-EOB-DTPA(0.025 mmol/kg body weight).Images were evaluated by clinical study investigators and three independent,blinded radiologists.The primary efficacy endpoint was sensitivity in lesion detection.RESULTS:Gd-EOB-DTPA improved sensitivity in lesion detection by 9.46%compared with pre-contrast imaging for the average of the three blinded readers(94.78%vs 85.32%for Gd-EOB-DTPA vs pre-contrast,respectively).Improvements in detection were more pronounced in lesions less than 1cm.Gd-EOB-DTPA improved diagnostic accuracy in lesion classification.CONCLUSIONS:This open-label study demonstrated that Gd-EOB-DTPA improves diagnostic sensitivity in liver lesions,particularly in those smaller than 1 cm.Gd-EOB-DTPA also significantly improves the diagnostic accuracy in lesion classification,and furthermore,Gd-EOB-DTPA is safe in Chinese patients with liver lesions.Meng-Su Zeng Hui-Yi Ye Liang Guo Wei-Jun Peng Jian-Ping Lu Gao-Jun Teng Josy Breuer Yi Huan Ping Li Jian-Rong Xu Chang-Hong Liang 2013Hepatobiliary & Pancreatic Diseases International2013,12,6:31
4Holmium laser versus conventional transurethral resection of the bladder tumor显示文摘TENG Jing-fei WANG Kai YIN Lei QU Fa-jun ZHANG Dong-xu CUI Xin-gang XU Dan-feng 2013Chinese Medical Journal2013,,9:32
5The Association of Maternal Body Composition and Dietary Intake with the Risk of Gestational Diabetes Mellitus during the Second Trimester in a Cohort of Chinese Pregnant Women显示文摘Objective To investigate the association of maternal body composition and dietary intake with the risk of gestational diabetes mellitus(GDM). Methods A total 154 GDM subjects and 981 controls were enrolled in a prospective cohort study in 11 hospitals from May 20, 2012 to December 31, 2013. Bioelectrical impedance analysis and dietary surveys were used to determine body composition and to evaluate the intake of nutrients in subjects at 21-24 weeks' gestation(WG). Logistic regression analysis was applied to explore the relationships of maternal body composition and dietary intake with the risk of GDM morbidity. Results Age, pre-pregnant body weight(BW), and body mass index(BMI) were associated with increased risk of GDM. Fat mass(FM), fat mass percentage(FMP), extracellular water(ECW), BMI, BW, energy, protein, fat, and carbohydrates at 21-24 WG were associated with an increased risk of GDM. In contrast, fat free mass(FFM), muscular mass(MM), and intracellular water(ICW) were associated with a decreased risk of GDM. Conclusion Maternal body composition and dietary intake during the second trimester of pregnancy were associated with the risk of GDM morbidity.Xu Qing Gao Zhi Ying Li Li Ming Wang Lu Zhang Qian Teng Yue Zhao Xia Ge Sheng Jing Hong Jiang Yang Yong Tao Liu Xiao Jun Lyu Chun Jian Mao Lun Yu Xiao Ming Liu Ying Hua Kong Ai Jing Yang Xue Yan Liu Zhao Zhang Yong Wang Jin Zhang Xin Sheng Xue Chang Yong Lu Yan Ping 2016Biomedical and Environmental Sciences2016,29,1:29
6Engineering a New Chloroplastic Photorespiratory Bypass to In crease Photosynthetic Efficiency and Productivity in Rice显示文摘Over the past few years, three photorespiratory bypasses have been introduced into plants, two of which led to observable in creases in photos yn thesis and biomass yield. However, most of the experiments were carried out using Arabidopsis under controlled environmental conditions, and the increases were only observed under low-light and short-day conditions. In this study, we designed a new photorespiratory bypass (called GOC bypass), characterized by no reducing equivalents being produced during a complete oxidation of glycolate into CO2 catalyzed by three rice-self-originating enzymes, i.e., glycolate oxidase, oxalate oxidase, and catalase. We successfully established this bypass in rice chloroplasts using a multi-gene assembly and transformation system. Transgenic rice plants carrying GOC bypass (GOC plants) showed significant increases in photosynthesis efficiency, biomass yield, and nitrogen content, as well as several other CO2-enriched phe no types under both greenhouse and field conditions .Grain yield of GOC plants varied depending on seeding season and was increased significantly in the spring. We further demonstrated that GOC plants had significant advantages under high-light conditions and that the improvements in GOC plants resulted primarily from a photosynthetic CO2-concentrating effect rather than from improved energy balance. Taken together, our results reveal that engineering a newly designed chloroplastic photorespiratory bypass could increase photosynthetic efficiency and yield of rice plants grown in field conditions, particularly under high light.Bo-Ran Shen Li-Min Wang Xiu-Ling Lin Zhen Yao Hua-Wei Xu Cheng-Hua Zhu Hai-Yan Teng Li-Li Cui E.-E. Liu Jian-Jun Zhang Zheng-Hui He Xin-Xiang Peng 2019Molecular Plant2019,12,2:30
7Characteristic pattern of human prostatic growth with age显示文摘Aim:To study the characteristic pattern of the age-related growth of the human prostate gland.Methods:The volume (weight) of the prostate in 1,601 males,aged from newborn to 92 years,was determined by Bultrasonography.Results:Prostatic volume determination by B-ultrasonography in 1601 males (1301 normal subjects and 300 BPH patients) pointed out that the age-stratified growth of human prostate could be categorized into 4 life stages:(1) the first slow growing phase(from newborn to 9 years):the prostate grows slowly at a rate of 0.14g per year;(2)the first rapid growing phase (from 10 to 30 years):the prostate grows at a rate of 0.84g per year;(3)the second slow growing phase (from 30 to 50 years),the prostate grows at a rate of 0.21g per year;(4)the second rapid growing phase (from 50 to 90 years):the prostate grows at one of the following rates:in one group the growth rate is of 0.50g per year and in the other 1.20g per year,leading to benign prostatic hyperplasia(BPH).Conclusion:The volumes of the prostate are different in different age groups and it grows with age at different rates in four life phases.The prostate growth in phases can be expressed by the following equation:Y=19.36+1.36X'-0.58X'^2+0.33X'^3,where Y=prostate volume,X=age(up to 70 years),X'=(X-35.5)/10.Shu-Jie XIA Xiao-Xin XU Jian-Bao TENG Chun-Xiao XU Xiao-Da TANG 2002Asian Journal of Andrology2002,4,4:30
8Incidence of Pleural Effusion in Patients with Pulmonary Embolism显示文摘Min Liu Ai Cui Zhen-Guo Zhai Xiao-Juan Guo Man Li Lei-Lei Teng Li-Li Xu Xiao-Juan Wang Zhen Wang Huan-Zhong Shi 2015Chinese Medical Journal2015,,8:25
9Prognostic value of clinical and pathological factors for surgically treated localized clear cell renal cell carcinoma显示文摘Teng Jingfei Gao Yi Chen Ming Wang Kai Cui Xingang Liu Yushan Xu Danfeng 2014Chinese Medical Journal2014,,9:23
10The rice OsV4 encoding a novel pentatricopeptide repeat protein is required for chloroplast development during the early leaf stage under cold stress显示文摘Pentatricopeptide repeat(PPR)proteins,characterized by tandem arrays of a 35 amino acid motif,have been suggested to play central and broad roles in modulating the expression of organelle genes in plants.However,the molecular mechanisms of most rice PPR genes remains unclear.In this paper,we isolated and characterized a temperature-conditional virescent mutant,OsV4,in rice(Oryza sativa cultivar Jiahua1(WT,japonica rice variety)).The mutant displays albino phenotype and abnormal chloroplasts at the three leaf stage,which gradually turns green after the four leaf stage at a low temperature(20°C).But the mutant always develops green leaves and well-developed chloroplasts at a high temperature(32°C).Genetic and molecular analyses uncovered that OsV4 encodes a novel chloroplast-targeted PPR protein including four PPR motifs.Further investigations show that the mutant phenotype is associated with changes in chlorophyll content and chloroplast development.The OsV4transcripts only accumulate to high levels in young leaves,indicating that its expression is tissue-specific.In addition,transcript levels of some ribosomal components and plastid-encoded polymerase-dependent genes are dramatically reduced in the albino mutants grown at 20°C.These findings suggest that OsV4 plays an important role during early chloroplast development under cold stress in rice.Xiaodi Gong Qianqian Su Dongzhi Lin Quan Jiang Jianlong Xu Jianhui Zhang Sheng Teng Yanjun Dong 2014Journal of Integrative Plant Biology2014,56,4:19
11经尿道等离子体前列腺电切术是一种治疗良性前列腺增生可靠的微创术式:一项随机对照试验的荟萃分析显示文摘我们进行一项随机对照试验的荟萃分析来评估经尿道等离子体电切术(PKRP)和经尿道前列腺电切术(TURP)治疗良性前列腺增生的疗效性和安全性。我们检索了PubMed,Embase,WebofScience和CochraneLibrary。对最大尿流率、国际前列腺症状评分、手术时间、留置导尿时间、冲洗量、住院时间和经尿道前列腺电切综合征、输血、血块凝结、尿潴留和尿道狭窄的风险率进行评估。TURP和PKRP两组在随访的1、3、6和12月的国际前列腺症状评分上无明显差异,而PKRP组1月后的Qmax优于TURP组。PKRP组的经尿道前列腺电切综合症、输血和血块凝结的风险率更低,且留置导尿时间和手术时间都短于TURP组。而冲洗量、住院时间,尿潴留和尿道狭窄发生率无显著差异。总之,我们的研究表明PKRP是可靠的且能够成为治疗BPH的一种微创术式。Kai Wang Yao Li Jing-Fei Teng Hai-Yong Zhou Dan-Feng Xu Yi Fan 2015Asian Journal of Andrology2015,17,1:19
12Neuronavigator-guided percutaneous radiofrequency thermocoagulation in the treatment of intractable trigeminal neuralgia显示文摘因为它的安全和可行性,三叉的中心(PRTTG ) 的背景经皮的收音机频率 thermocoagulation 与三叉的神经痛(TN ) 为大多数病人被认为是第一种选择。然而,指导 neuronavigator 的 PRTTG 很少被报导了。这研究的目的是为难处理的 TN 的治疗估计 neuronavigator-guidedPRTTG 的安全和功效。在 2000 年 1 月和 2004 年 12 月之间的方法,有难处理的 TN 的 54patients 被注册进这研究并且随机被划分成二个组。在航行组(n=26 ) 的病人少些与框架经历了 PRTTG 没有神经原航空,在控制组(n=28 ) 的神经原航空,和那些收到了 PRTTG。在外科的操作,功效,副作用,和复杂并发症以后的三个月被记录。在控制组的病人被跟随在上面为 10 ~ 54 个月(平均数, 34 ± 5 ) ,并且那些在航行组被跟随在上面为 13 ~ 58 个月(平均数, 36 ± 7 ) 。pain-freesurvival 曲线的 Kaplan-Meier 分析被用于审查幸存数据,并且木头等级测试被用来比较二个组的幸存曲线。结果航行组的立即的完全的疼痛消除率是 100% ,而它在控制是 95% 。持续疼痛消除的比例评估 at12,在过程以后的 24 和 36 个月在航行组,和 54%,40% 是 85% , 77% ,和 62% ,并且 35% 在控制。在控制组的复发在然后是比那更普通的航空组。第一和第二年里的年度复发率在然后是 15% 和 23% 航空组,并且 46% , 60% 在控制组。除了最小的面部忧郁感觉,没有副作用和复杂并发症在航行组被注意。没有神经原航空,结论指导 Neuronavigator 的 PRTTG 比 PRTTG 是为有更好短期、长期的结果和更低的复杂并发症率的难处理的 TN 的治疗的一个安全、有希望的方法。XU Shu-jun ZHANG Wen-hua CHEN Teng WU Cheng-yuan ZHOU Mao-de 2006Chinese Medical Journal2006,,18:18
13Ubiquitination of Rheb governs growth factor-induced mTORC1 activation显示文摘Mechanistic target of rapamycin mTOR complex 1 (mTORC1)plays a key role in the integration of various environmental signals to regulate cell growth and metabolism,mTORC1 is recruited to the lysosome where it is activated by its interaction with GTP-bound Rheb GTPase.However,the regulatory mechanism of Rheb activity remains largely unknown.Here,we show that ubiquitination governs the nucleotide-bound status of Rheb.Lysosome-anchored E3 ligase RNF152 catalyzes Rheb ubiquitination and promotes its binding to the TSC complex.EGF enhances the deubiquitination of Rheb through AKT-dependent USP4 phosphorylation,leading to the release of Rheb from the TSC complex.Functionally,ubiquitination of Rheb is linked to mTORC1-mediated signaling and consequently regulates tumor growth.Thus,we propose a mechanistic model whereby Rheb-mediated mTORC1 activation is dictated by a dynamic opposing act between Rheb ubiquitination and deubiquitination that are catalyzed by RNF152 and USP4 respectively.Lu Deng Lei Chen Linlin Zhao Yan Xu Xiaoping Peng Xinbo Wang Lin Ding Jiali Jin Hongqi Teng Yanming Wang Weijuan Pan Fei Yu Lujian Liao Li Li Xin Ge Ping Wang 2019Cell Research2019,29,2:16
14Consensus among Chinese experts on standard interventional therapy for deep venous thrombosis of lower extremity(second edition)显示文摘This is an update on the first edition of the expert consensus. This document discusses the indications and contraindications of interventional treatment methods for deep venous thrombosis such as anticoagulation, catheter-directed thrombolysis, percutaneous mechanical thrombectomy, percutaneous transluminal angioplasty and stent implantation. The operational procedures, considerations, preoperative management, and prevention of complications were also updated, supplemented, and revised. Emphasis is placed on the interventional treatment of acute and subacute deep venous thrombosis to effectively reduce the incidence of post-thrombosis syndrome.Jianping Gu Ke Xu Gaojun Teng 2018Journal of Interventional Medicine2018,1,3:16
15Electroacupuncture inhibits annulus fibrosis cell apoptosis in vivo via TNF-α-TNFR1-caspase-8 and integrin β1/Akt signaling pathways显示文摘OBJECTIVE: To examine whether electroacupuncture(EA) treatment inhibited cell apoptosis of intervertebral annulus fibrosis(AF) via tumor necrosis factor-α(TNF-α)-tumor necrosis factor receptor 1(TNFR1)-caspase-8 and integrin β1/Akt signaling pathways in a rat model of cervical intervertebral disc degeneration caused by unbalanced dynamic and static forces.METHODS: Thirty-two Sprague-Dawley rats were included in this study, of which 24 rats underwent surgery to induce cervical intervertebral disc degeneration, while eight rats received EA treatment at Dazhui(GV 14). Immunohistochemical staining was used to detect TNF-α, TNFR1, and caspase-8Apoptosis of AF cells was examined with terminal deoxynucleotidyl transferase-mediated d UTP-biotin nick end labeling(TUNEL) staining. The m RNA and protein expression levels of integrin β1 andAkt were evaluated with real-time polymerase chain reaction and western blot analysis, respectively.RESULTS: Treatment with EA decreased TUNEL-positive AF cells and lowered TNF-α, TNFR1 and caspase-8 positive cells compared with control groups. EA treatment also increased integrin β1and Akt m RNA and protein levels compared with controls.CONCLUSION: Treatment with EA inhibits AF cell apoptosis through suppression of the TNF-α-TNFR1-caspase-8 signal pathway and increases the expression of integrin β1 and Akt. EA may be a good alternative therapy for treating cervical spondylosis.Jun Liao Le Zhang Jiaxuan Zheng Debiao Yu Meigui Ke Teng Xu 2014Journal of Traditional Chinese Medicine2014,34,6:12
16The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart 2019Science China(Physics,Mechanics & Astronomy)2019,62,2:11
17Effect of Gd addition on microstructure and corrosion behaviors of Mg-Zn-Y alloy显示文摘The Mg_(97-x)Zn_(1)Y_(2)Gd_(x) alloys were prepared by as-casting method.Corrosion performance of alloys was evaluated by using potentiodynamic polarization,hydrogen evolution rate and mass loss measurements in 3%sodium chloride solution at room temperature.The results shown that the atomic rate of the long period stacking ordered(LPSO)with the composition of Mg_(12)Zn_(1)Y_(1).The microstructure of LPSO phases was lamellar structure.When the atomic fraction of Zn is 1%and the atomic ratio of Zn/RE(Y,Gd)is 2:5,the volume fraction of LPSO phase can reach the extreme value.The corrosion resistance of Mg–Zn–Y alloy improves with the increase of the volume fraction of LSPO phase.The Mg_(96.5)Zn_(1)Y_(2)Gd_(0.5)(MG0.5)alloy had better corrosion resistance than those of other alloys.It meant that 0.5 at.%gadolinium(Gd)was a suitable addition to Mg_(97)Zn_(2)Y alloy about corrosion resistance.Jinyang Zhang Min Xu Xinying Teng Min Zuo 2016Journal of Magnesium and Alloys2016,4,4:11
18Diagnostic accuracy of endoscopic ultrasonography for rectal neuroendocrine neoplasms显示文摘AIM:To investigate the diagnostic accuracy of endoscopic ultrasonography(EUS)for rectal neuroendocrine neoplasms(NENs)and the differential diagnosis of rectal NENs from other subepithelial lesions(SELs).METHODS:The study group consisted of 36 consecutive patients with rectal NENs histopathologically diagnosed using biopsy and/or resected specimens.The control group consisted of 31 patients with homochronous rectal non-NEN SELs confirmed by pathology.Epithelial lesions such as cancer and adenoma were excluded from this study.One EUS expert blinded to the histological results reviewed the ultrasonic images.The size,original layer,echoic intensity and homogeneity of the lesions and the perifocal structures were investigated.The single EUS diagnosis recorded by the EUS expert was compared with the histological results.RESULTS:All NENs were located at the rectum 2-10 cm from the anus and appeared as nodular(n=12),round(n=19)or egg-shaped(n=5)lesions with a hypoechoic(n=7)or intermediate(n=29)echo pattern and a distinct border.Tumors ranged in size from 2.3 to 13.7 mm,with an average size of 6.8 mm.Homogeneous echogenicity was seen in all tumors except three.Apart from three patients(stage T2 in two and stage T3 in one),the tumors were located in the second and/or third wall layer without involvement of the fourth and fifth layers.In the patients with stage T1 disease,the tumors were located in the second wall layer only in seven cases,the third wall layer only in two cases,and both the second and third wall layers in27 cases.Approximately 94.4%(34/36)of rectal NENs were diagnosed correctly by EUS,and 74.2%(23/31)of other rectal SELs were classified correctly as nonNENs.Eight cases of other SELs were misdiagnosed as NENs,including two cases of inflammatory lesions and one case each of gastrointestinal tumor,endometriosis,metastatic tumor,lymphoma,neurilemmoma,and hemangioma.The positive predictive value of EUS for rectal NENs was 80.9%(34/42),the negative predictive value was 92.0%(23/25),and the diagnostic accuracy was85.1%.CONCLUSION:EUS has satisfactory diagnostic accuracy for rectal NENs with good sensitivity,but unfavorable specificity,making the differential diagnosis of NENs from other SELs challenging.Hong-Tan Chen Guo-Qiang Xu Xiao-Dong Teng Yi-Peng Chen Li-Hua Chen You-Ming Li 2014World Journal of Gastroenterology2014,20,30:10
19Waxy allelic diversity in common millet(Panicum miliaceum L.) in China显示文摘A set of 132 accessions of common millet,Panicum miliaceum L.,from 12 provinces of China were assessed for endosperm starch type(waxy or non-waxy)using I_2-KI staining,amylose and amylopectin contents using the dual-wavelength colorimetric method,and genotype of Waxy genes conditioning amylose content by gene sequencing.Endosperm starch content varied from57.69%to 74.70%,while the amylose and amylopectin contents of the starch ranged from 0 to23.29%and from 41.99%to 70.24%,respectively.Sequencing two Wx genes,including Wx-L(intron 5-exon 7 and intron 8–9)and Wx-S(exon 9–intron 10)revealed several polymorphisms(S_0,S_(-15),L_C,L_F,L_Y).Marker M5-R11 linking to the Wx-S gene may be used to discriminate waxy common millet accessions from non-waxy ones.Among the 132 accessions,68 with the S_(-15)allele had waxy endosperm starch with the amylose content range 0–2.58%and 64 accessions with the S_0allele had non-waxy endosperm starch with amylose content range 3.94%–23.29%.Five genotypes including S_(-15)/L_F(45%of the accessions),S_0/L_F(25%),S_0/L_Y(12%),S_0/L_C(11%),and S_(-15)/L_Y(7%)were identified.Six new SNPs were detected at the Wx-L locus.These results will facilitate common millet breeding,especially of cultivars free of amylose.Ruiyun Wang Haigang Wang Xiaohuan Liu Xu Ji Ling Chen Ping Lu Minxuan Liu Bin Teng Zhijun Qiao 2018The Crop Journal2018,6,4:10
20First Imported Case of SARS-CoV-2 Omicron Subvariant BA.5—Shanghai Municipality,China,May 13,2022显示文摘On April 27,2022,an international flight KL857 from Amsterdam,the Netherlands arrived at Pudong International Airport,Shanghai Municipality.Passengers were transferred to the quarantine hotel for a routine 14-day medical observation in Songjiang District and regularly tested for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).One of the passengers(a 37-year-old Chinese male)was reported positive and diagnosed as a mild case on April 29.The case set out from Uganda(flight KL535)on April 25 and transferred at Amsterdam,the Netherlands on April 26 and Seoul,the Republic of Korea(KL857)on April 27.The patient has been vaccinated in four doses against coronavirus disease 2019(COVID-19)(Beijing Institute of Biological Products Co.,Ltd)in China and Uganda.After diagnosis,he was transferred to Shanghai Public Health Clinical Center for treatment.He recovered after treatment and was discharged on May 12.Hui Jiang Changcheng Wu Wenbo Xu Hongyou Chen Fanghao Fang Min Chen Chaonan Wang Lingyue Yuan Huanyu Wu Zheng Teng Jinyuan Guo Yaxu Zheng Xihong Lyu Xuefei Qiao Guizhen Wu Wenjie Tan Xi Zhang 2022China CDC weekly2022,4,30:10
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