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Effect of Al and Zn additives on grain size of Mg-3Ni-2MnO_(2) alloy

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Transactions of Nonferrous Metals Society of China 2009年第S2期19卷 355-358页

作者： FANg wa SUN Hong-fei FANg Wen-bin wa.g Bin School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The effect of Al and Zn additives on the grain size of Mg-3Ni-2MnO_(2) alloy was *** nanostructured Mg-3Ni-2MnO_(2) and Mg-3Ni-2MnO_(2)-3Al-Zn were made by ball milling process under hydrogen *** XRD results and TEM analysis reveal that Al and Zn additives almost have no effect on the grain size of Mg-3Ni-2MnO_(2) *** present study provides us a feasibility of producing nano-structured magnesium alloys,based on hydrogenation,disproportionation,desorption and recombination(HDDR),by adding beneficial elements to hydrogen storage materials.

关键词： nanocrystalline magnesium alloy hydrogenation-disproportionation-desorption-recombination(HDDR) ball milling

A Computational Study of Asymmetric Hydrogenation of 2-Phenyl Acrylic Acids Catalyzed by a Rh(l) Catalyst with Ferrocenyl Chiral Bisphosphorus Ligand: The Role of Ion-Pair Interaction

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Chinese Journal of Chemistry 2021年第6期39卷 1616-1624页

作者： Xiangru Fan Lini Zheng Yuhong Yang Xiu-Qin Dong Xumu Zhang Lung-wa Chung Deportment of Chemistry Guangdong Provincial Key Laboratory of Catalysis and Shenzhen Grubbs InstituteSouthern University of Science and TechnologyShenzhenGuangdong 518055China Key Laboratory of Biomedical Polymers Engineering Research Center of Organosilicon Compounds&MaterialsMinistry of EducationCollege of Chemistry and Molecular SciencesWuhan UniversityWuhanHubei 430072China

Asymmetric hydrogenation reaction is one of the most efficient synthetic methods to form useful chiral compounds for synthetic chemistry,medicinal chemistry and material ***,the enantioselectivity of many hydrogenation reactions is controlled by steric hindrance between the chiral ligand and ***,Zhang group developed a highly asymmetric hydrogenation of 2-aryl and 2-alkyl acrylic acids catalyzed by a Rh(l)catalyst with a chiral Wudaphos *** excellent enantioselectivity of this asymmetric reaction was proposed to be controlled by ion-pair interaction between the substrate and chiral *** this study,a systematic density functional theory study has been carried out to investigate the reaction mechanism and origin of the *** computational results suggest that this reaction follows the classic mechanism involving oxidative addition of H_(2),migratory insertion and reductive *** from the C=C coordination to the metal in the common oxidative addition step,our study found that the chelation of the carboxyl group of the substrate to the cationic Rh(l)metal is more favorable in this oxidative addition *** high enantioselectivity is proposed to be dictated by a better catalyst/substrate geometric complementarity in the major pathway to have less distortion of the catalyst for a strong ion-pair interaction.

关键词： Hydrogenation Enantioselectivity Reaction mechanism Density functional theory Ion-pair interaction

Rice-wheat comparative genomics:gains and gaps

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The Crop Journal 2024年第3期12卷 656-669页

作者： Akila Wijerathna-Yapa Ruchi Bishnoi Buddhini Ranawaka Manu Maya Magar Hafeez Ur Rehman Swati g.Bharad Michal T.Lorenc Vinita Ramtekey Sasha gohar Charu Lata Md.Harun-Or-Rashid Maryam Razzaq Muhammad Sajjad Bhoja *** School of Agriculture and Food Sustainability The University of QueenslandSt LuciaQLD 4072Australia ARC Centre of Excellence for Plant Success in Nature and Agriculture The University of QueenslandSt LuciaQLD 4072Australia Department of genetics and Plant Breeding College of AgricultureUmmedganj-KotaAgriculture UniversityKotaRajasthan 324001India Centre for Agriculture and the Bioeconomy Queensland University of Technology(QUT)2 George StreetBrisbaneQLD 4000Australia Uwa School of Agriculture and Environment The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia Nepal Agriculture Research Council KhumaltarLalitpurNepal Department of Agronomy University of AgricultureFaisalabad 38040Pakistan Department of Agricultural Botany Dr Panjabrao Deshmukh Krishi VidyapeethAkola 444104MaharashtraIndia ICAR-Indian Institute of Seed Science MauUttar Pradesh 275103India School of Natural Sciences Macquarie UniversityMacquarie ParkNSW 2109Australia ICAR-Indian Institute of Wheat and Barley Research Flowrdale 54642ShimlaIndia International Maize and Wheat Improvement Center(CIMMYT)Bangladesh Office Gulshan-2Dhaka 1212Bangladesh Center for Seed Science University of AgricultureFaisalabad 38000Pakistan Department of Biosciences COMSATS University IslamabadPark RoadTarlai KalanIslamabad 45550Pakistan CgIAR’s Excellence in Breeding(EiB)Platform/Accelerated Breeding Initiative International Maize and Wheat Improvement Center(CIMMYT)El Batán 56237Mexico

Rice and wheat provide nearly 40%of human calorie and protein *** share a common ancestor and belong to the Poaceae(grass)*** their genetic homology is crucial for developing new cultivars with enhanced *** wheat genes and gene families have been characterized based on their rice ***–wheat orthology can identify genetic regions that regulate similar traits in both ***–wheat comparative genomics can identify candidate wheat genes in a genomic region identified by association or QTL mapping,deduce their putative functions and biochemical pathways,and develop molecular markers for marker-assisted breeding.A knowledge of gene homology facilitates the transfer between crops of genes or genomic regions associated with desirable traits by genetic engineering,gene editing,or wide crossing.

关键词： Comparative genomics Orthologs genes Synteny genetic engineering Molecular breeding

Design and research of magnetic field sensor based on grapefruit optical fiber filled with magnetic fluid

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Optoelectronics Letters 2022年第5期18卷 269-275页

作者： wa.g Mengye JIN wa LIU Xuejing SUN Wenjie ZHANg Chenhui BI Weihong College of Information Science and Engineering Yanshan UniversityQinhuangdao066000China The Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province Qinhuangdao066000China College of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai200093China

A novel magnetic field sensor was proposed based on the grapefruit optical fiber with the magnetic fluid injected into the six air *** sensor utilizes the Mach-Zehnder interference(MZI).The light is transmitted through the single-mode fiber to the fusion splice point and is divided into two *** the light passes through the cladding air hole with magnetic fluid,it interferes with the core light,and the change of the interference light is related with the change of the magnetic *** sensor cavity length is 6 *** can be obtained from the experimental results that the magnetic field sensitivity reaches up to 2.243 nm/Oe with the range from 0 to 2.28 *** sensor has the advantages of easy fabrication,easy installation and low *** findings provide new ideas for the study of ocean wind electromagnetic fields.

关键词： fiber optical magnetic

内蒙古牛呼吸道合胞体病毒的分离鉴定及其全基因组分析

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中国预防兽医学报 2024年第5期46卷 476-483页

作者：黄金田李静丁玉林王文龙高娃王金玲内蒙古农业大学兽医学院/农业农村部动物疾病临床诊疗技术重点实验室内蒙古呼和浩特010010 内蒙古自治区科学技术厅内蒙古呼和浩特010000 河套学院医学系/内蒙古自治区蜱媒人畜共患传染病重点实验室内蒙古巴彦淖尔015000

为确定引起内蒙古地区3月龄~6月龄荷斯坦犊牛暴发呼吸系统疾病的病原,并分析其基因组序列,本研究对病死犊牛剖检并观察其各脏器的剖检病变,制备各组织病理切片,观察其组织病变。结果可见犊牛肺脏呈深红色有光泽的肌肉样实变,心脏肥大,... 详细信息

为确定引起内蒙古地区3月龄~6月龄荷斯坦犊牛暴发呼吸系统疾病的病原,并分析其基因组序列,本研究对病死犊牛剖检并观察其各脏器的剖检病变,制备各组织病理切片,观察其组织病变。结果可见犊牛肺脏呈深红色有光泽的肌肉样实变,心脏肥大,肝脏表面散在细小的结节状灰白色病灶,肾脏表面散在细小深红色出血点;组织病理学观察可见典型间质性肺炎,多数各级细支气管腔和肺泡腔内巨噬细胞和淋巴细胞大量增生和浸润,偶见合胞体细胞,在各级细支气管部分黏膜上皮细胞浆内有大小不等的圆形红染的病毒包涵体;轻度纤维化和小坏死灶的变质性肝炎,急性炎性脾肿,多发性小出血灶的慢性硬化性肾小球肾炎。进一步进行RT-PCR检测,结果显示,扩增获得约600 bp的目的条带,测序后与genBank中相关基因序列比对,结果显示目的基因与牛呼吸道合胞体病毒(BRSV)美国分离株USII/S1(KU159366)的同源性最高(98.42%),表明该地区某牧场犊牛感染了BRSV。将该病例肺组织研磨上清液接种牛肾细胞(MDBK)盲传3代出现典型的细胞病变,经RT-PCR检测确认为BRSV,进一步表明分离到1株BRSV,命名为IM BRSV-39。分段扩增IM BRSV-39株的全基因组序列,经测序后拼接获得长度为15130 bp的BRSV全基因组序列。采用MegAlign软件分析IM BRSV-39株的全基因组序列、g基因序列和F基因序列的同源性及突变位点;采用MEgA 11软件构建分离株全基因组进化树分析其遗传进化关系。结果显示,IM BRSV-39株的全基因组序列、g基因和F基因序列均与BRSVⅢ亚型分离株相应基因序列的同源性最高、且位于同一进化分支,证实IM BRSV-39株属于BRSVⅢ亚型;突变位点分析结果显示:与BRSVⅢ亚型参考株相比,IM BRSV-39株g基因序列存在7个突变位点,F基因序列存在12个突变位点;g蛋白氨基酸序列存在4个突变位点,其中L13H处在g蛋白的胞质结构域(aa1~aa37);Y^(127)H、I^(139)T、P^(177)L、A^(186)T处在g蛋白的胞外结构域(aa66~aa257);F蛋白氨基酸序列存在5个氨基酸突变位点,其中M^(4)T、M^(7)T、S^(14)C处在F蛋白氨基末端信号肽区(aa1~aa26)。本研究检测并分离到1株BSRV,揭示了该病毒基因组的遗传进化特征,为国内BRSV的深入研究奠定了基础。

关键词：病毒包涵体牛呼吸道合胞体病毒全基因组遗传进化

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西藏昌都丁青县孜珠寺藏古籍考察记

古籍保护研究 2024年第2期 103-114页

作者：萨仁高娃王沛白张王建海国家图书馆古籍馆国家古籍保护中心办公室西藏图书馆

2023年5月15日,“古象雄文化遗产调查及抢救性保护研究项目”课题组在西藏丁青县孜珠山(外象雄中心)启动古籍普查及调研座谈活动。本项目由中国经济时报社与国家古籍保护中心合作开展,在“中华古籍保护计划”框架下,对西藏昌都孜珠寺所... 详细信息

2023年5月15日,“古象雄文化遗产调查及抢救性保护研究项目”课题组在西藏丁青县孜珠山(外象雄中心)启动古籍普查及调研座谈活动。本项目由中国经济时报社与国家古籍保护中心合作开展,在“中华古籍保护计划”框架下,对西藏昌都孜珠寺所藏藏文古籍开展调研,旨在深度挖掘古象雄文化遗产的时代价值,探索古籍的文物和文献价值,在古籍普查的基础上进一步做好原生性保护与再生性保护。本文作为“古象雄文化遗产调查及抢救性保护研究项目”成果之一,详尽记录了本次考察的项目背景、考察目的、考察情况,并对文献价值进行评估,提出下一步工作计划。

关键词：西藏古象雄孜珠寺苯教古籍

Comparative transcriptome analysis reveals molecular adaptations underlying distinct immunity and inverted resting posture in bats

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Integrative Zoology 2023年第3期18卷 493-505页

作者： Jinwei WU Libiao ZHANg Chao SHEN Simon Yung wa SIN Caoqi LEI Huabin ZHAO Engineering Research Center of Eco-environment in Three gorges Reservoir Region of Ministry of Education China Three Gorges UniversityYichangChina guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationInstitute of ZoologyGuangdong Academy of SciencesGuangzhouChina College of Life Sciences Wuhan UniversityWuhanChina School of Biological Sciences The University of Hong KongHong Kong SARChina

Understanding how natural selection shapes unique traits in mammals is a central topic in evolutionary *** mammalian order Chiroptera(bats)is attractive for biologists as well as the general public due to their speciﬁc traits of extraordinary immunity and inverted resting ***,genomic resources for bats that occupy key phylogenetic positions are not sufﬁcient,which hinders comprehensive investigation of the molecular mechanisms underpinning the origin of speciﬁc traits in ***,we sequenced the transcriptomes of 5 bats that are phylo-genetically divergent and occupy key positions in the phylogenetic tree of *** combination with the available genomes of 19 bats and 21 other mammals,we built a database consisting of 10918 one-to-one ortholog genes and reconstructed phylogenetic relationships of these *** found that genes related to immunity,bone remodeling,and cardiovascular system are targets of natural selection along the ancestral branch of *** analyses revealed that the T cell receptor signaling pathway involved in immune adaptation is speciﬁcally enriched in ***,molecular adaptations of bone remodeling,cardiovascular system,and balance sensing may help to explain the reverted resting posture in *** study provides valuable transcriptome resources,enabling us to tentatively identify genetic changes associated with bat-speciﬁc *** work is among theﬁrst to advance our understanding of the molecular underpinnings of inverted resting posture in bats,which could provide insight into healthcare applications such as hypertension in humans.

关键词： adaptation bats immunity resting posture transcriptome

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西藏地区93例小儿肝囊型包虫病的手术治疗

肝脏 2024年第1期29卷 99-101页

作者：冶俊山陈彪巴桑顿珠达瓦西藏自治区人民医院普通外科拉萨850000

目的探讨小儿肝囊型包虫病的临床特点及手术治疗的效果。方法回顾性分析西藏自治区人民医院普通外科2014年1月至2019年12月手术治疗小儿肝囊型包虫病患者的临床资料,包括临床表现、囊肿特点、手术方式及术后并发症。结果共纳入93例患儿... 详细信息

目的探讨小儿肝囊型包虫病的临床特点及手术治疗的效果。方法回顾性分析西藏自治区人民医院普通外科2014年1月至2019年12月手术治疗小儿肝囊型包虫病患者的临床资料,包括临床表现、囊肿特点、手术方式及术后并发症。结果共纳入93例患儿,其中男性53例,女性40例。58例(62.3%)无症状体检发现就诊,29例(31.1%)表现为腹痛。62例(66.6%)囊肿位于肝右叶,12例(12.9%)位于肝左叶,左右肝均有19例(20.4%),肝内多发囊肿34例(36.55%);囊肿直径(9.14±3.16)cm;43例(46.2%)行内囊摘除术,39例(41.9%)行外囊次全切除术,11例(11.8%)行外囊完整摘除术;术后并发残腔胆漏5例,胸腔积液11例,残腔感染1例,肺部感染2例,死亡1例。术后随诊1~4年,复发4例,均经口服阿苯达唑治疗,定期B超随诊。结论小儿肝囊型包虫病无症状感染体检发现居多,囊肿多位于肝右叶且具有多发囊肿占比大、外囊壁薄的特点,手术是主要的的治疗方法,术式应遵循个体化的方案。

关键词：儿童肝囊型包虫病手术治疗

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Ureteral double J stent displaced into vena cava and management with laparoscopy: A case report and review of the literature

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World Journal of Clinical Cases 2018年第16期6卷 1160-1163页

作者： Xia-wa Mao gang Xu Jia-Quan Xiao Hui-Feng Wu Department of Urology the Second Affiliated Hospital of Zhejiang University School of Medicine

We reported displacement of a ureteral double J stent into the vena cava and laparoscopic management in a 69-year-old patient with a history of ureteral stent placement. Preoperative computed tomography and plain X-rays showed malpositioning of the double J stent and displacement into the inferior vena cava. The characteristics of stent misplacement precluded endovascular procedures and explorative laparoscopic surgery was performed. The intra-and postoperative periods were uneventful. Postoperative imaging demonstrated that the new double J stent was in the right position. The patient was discharged 7 d after the operation and was symptom free at the 4-mo followup.

关键词： Double J stent Displacement Inferior vena cava Laparoscopy