简介：AbstractWe conducted environmental surveillance to detect avian influenza viruses circulating at live poultry markets (LPMs) and poultry farms in Guangxi Autonomous Region, China, where near the China-Vietnam border. From November through April 2017-2018 and 2018-2019, we collected environmental samples from 14 LPMs, 4 poultry farms, and 5 households with backyard poultry in two counties of Guangxi and tested for avian influenza A, H5, H7, and H9 by real-time reverse transcription-polymerase chain reaction (rRT-PCR). In addition, we conducted four cross-sectional questionnaire surveys among stall owners on biosecurity practices in LPMs of two study sites. Among 16,713 environmental specimens collected and tested, the median weekly positive rate for avian influenza A was 53.6% (range = 33.5% - 66.0%), including 25.2% for H9, 4.9% for H5, and 21.2% for other avian influenza viruses A subtypes, whereas a total of two H7 positive samples were detected. Among the 189 LPM stalls investigated, most stall owners (73.0%) sold chickens and ducks. Therefore, continued surveillance of the avian influenza virus is necessary for detecting and responding to emerging trends in avian influenza virus epidemiology.

简介：报道了H5［H3AsMo7V5O40].9．5H2O的合成和元素分析、电位滴定、差热、红外光谱及紫外光谱等表征。并通过与H3+n[AsMo12-nVnO40].mH2O（n-1~4）系列的比较，对标题化合物的结构进行了确认。

简介：ＳＹＮＴＨＥＳＩＳＯＦ３－ＡＲＹＬ－１（２Ｈ，４Ｈ）ＡＣＲＩＤＯＮＥＳＡＮＤＴＨＥＩＲＤＥＲＩＶＡＴＩＶＥＳ￥ＲｏｎｇＹＩＮ；ＧｕａｎｇＦａｎＨＡＮ；ＹｕＴｉａｎＬＩ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｄｉｃａｌＬａｂｏｒａｔｏｒｙ，ＪｉｌｉｎＭｅｄｉｅａ...

简介：Thea-Si∶H/SiNx∶HsampleseriesareinvestigatedbymeansofRamanscatteringtechnique(RST).Theresultshowsthatduetothestructuralmismatchbetweena-Si∶Handa-SiNx∶H,severeinduceddistortionsareproducedintheinterfaceoftheheterojunction,andtheseinduceddistortionstendtowardsacertainenergystate.Theorderingoftheinterfacestructuredependsontheperiodicnumberofmultilayerthinfilms.

简介：本文报道了Ｃ６Ｈ１２Ｏ６（ＮＨ４）２ＳＯ４Ｃ２Ｈ５ＯＨＨ２Ｏ（Ｃ２Ｈ５ＯＨ／Ｈ２Ｏ＝０．９０）体系在３５℃时体系溶解度和饱和溶液的折光指数，并绘出了体系相应的溶度图和饱和溶液的折光指数曲线图。结果表明：所研究的体系为四元体系Ｃ６Ｈ１２Ｏ６（ＮＨ４）２ＳＯ４Ｃ２Ｈ５ＯＨＨ２Ｏ中的一部分。当溶液中肌醇饱和时，溶度曲线落在约５０％的等醇水比面上。当（ＮＨ４）２ＳＯ４在溶液中达到饱和时，出现共饱点。其组成为（ＮＨ４）２ＳＯ４：２１０％，Ｃ６Ｈ１２Ｏ６：２．０８％，Ｃ２Ｈ５ＯＨ：４４７５％。同时出现分层，在富醇相随着乙醇浓度的增加，出现肌醇与硫酸铵共饱线。在富水相硫酸铵饱和溶度曲线落在约５％乙醇的等醇水比面上，折光指数曲线由三支组成，其中两条分别与Ｃ６Ｈ１２Ｏ６·Ｈ２Ｏ和（ＮＨ４）２ＳＯ４相对应，另外一条线与（ＮＨ４）２ＳＯ４和Ｃ６Ｈ１２Ｏ６·Ｈ２Ｏ的共饱线相对应

简介：1IntroductionLetA∈Cn×n,B∈Cn×n.WesayBisasquarerootofAifA=B×Bi.e.A=B2.Itiswell-knownthatanysymmetricpositivedefinitematrixexistsoneandonlyonesquarerootwhichisasymmetricpositivedefinitematrix,too（e.g.see[5]）.Higham[4]studiedcarefullytherelationofarealnonsingularmatrixbetweenitsrealsquarerootsanditseigenvalues.AlefeldandSchneider[1]pointedoutthatforanynonsingularM-ma-trixthereisoneandonlyoneM-matrixasitssquareroot.Inthispaper,westudyona

简介：

简介：CблHцeпOCTOяHHOBOздéЙCTByeTHaHáшyплaHéTy,BызыBáeTHaHeЙTaKиeяBлéHия,KOTбpыeOTpaжáяюTCяHaпpkTичeCKOЙДéяTeлbHOCTи　людéй.MopяKи　и　лёTчиKи　Xopoшб　зHáюT,

简介：

简介：俄语中少数源自抽象名词的状态词与动词不定式构成的单部句，在语言实践中使用频率较高。文章从OXOTa+ИHФ．型句子的句法属性、聚合体、不定式体的使用、实义切分、语境等方面进行了阐释，以便学生全面掌握、正确灵活运用该句型。

简介：

简介：放宽QDII限制导致的国内热钱跨境流动，可以缩小A股与H股之间的价格偏差，不过两者之间不可能有完全的套戥，指望同质的A、H股出现同价是天方夜谭。

简介：快时尚与殿堂级设计师看似光鲜的合作，只是高端品牌博关注、高街品牌掀人气的噱头，何曾狂欢至天明？H＆M会和哪家大牌合作推出“XXforH＆M”系列？近几年，这个每年都会更新答案的问题成为人们期盼的焦点之一，各种猜测莫衷一是。

简介：<正>在亚洲的东方,巍然屹立着一个泱泱大国。在她广袤的土地上,孕育着一代代黄皮肤的龙的传人,演绎着无尽的风云传奇。她的辉煌让人侧目,人们在晨曦中瞥见她的侧影,轻吐她的名字:"C—H—I—N—A"。

简介：本文对H∞控制理论近二十年来的发展状况进行了综述。首先概括性的介绍了H∞控制理论的发展背景、诞生、发展和成熟。进而，针对近几年我国控制的发展详述了其主要的研究和应用成果。最后，总结了目前H∞控制存在的若干关键问题，并对今后H∞控制的发展进行了展望。

简介：H＆M是瑞典最大的服装连锁经营商，欧洲第三大最有影响力品牌，成立于1947年。迄今为止，H＆M已经成功地在欧洲的18个国家和美国共开设了950家连锁店，

简介：在珍视的模糊集合被考虑的间隔的模糊间隔值的伪巧合的概念。事实上，这个概念是在一个模糊集合的一个模糊的点的伪巧合的一个概括概念。由使用这个新概念，作者定义间隔的观点珍视半的模糊h理想包围的()；学习他们的相关性质。另外，作者也与阀值扩大模糊亚群的概念到珍视的间隔的概念模糊与在半戒指的阀值h理想。

简介：是孤独者的游戏，还是B股突围出口？

简介：讨论向量值函数的Banach代数H^∞（D；X）的极大理想空间的拓扑性质和代数性质，得到了若干结果。

简介：AbstractObjective:The aim of this work was to explore the feasibility of in vivo and non-invasive monitoring of deuterium/hydrogen (2H/1H) exchange at the metabolic level upon exposure to heavy water (2H2O).Methods:The healthy female mice were randomly assigned to two groups after day 0 when both mice received standard drinking water. The treated mouse was fed with 2H2O (80%, v/v) and the control mouse fed with standard drinking water (H2O) over next 13 days. Real-time mass spectrometric analysis of volatile metabolism emitted through breathing and the skin was performed on days 1, 2, 3, 10, 12, and 13. Animal experiment was approved by the Laboratory Animal Ethics Committee of Jinan University (approval No. 20161117163322) on October 29, 2021.Results:We observed a replacement of 1H by 2H in 52 mass spectral features (60 2H/1H isotopologue pairs) for the mouse fed with 2H2O, but not for the control mouse. These included pyruvic acid and lactic acid, lysine and methyl-lysine as well as short-chain fatty acids comprising acetic acid, propionic acid, butyric acid and valeric acid.Conclusion:Secondary electrospray ionization-high resolution mass spectrometry allows monitoring in vivo2H-incorporation of metabolites in a non-invasive and real-time setup and opens new opportunities to use 2H tracing to extend current metabolic studies, especially those with a focus on anaerobic glycolysis, lysine methylation and gut microbiome via monitoring of short-chain fatty acids.