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Androgen signaling inhibits de novo lipogenesis to alleviate lipid deposition in zebrafish

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Zoological Research 2024年第2期45卷 355-366页

作者： Jing-Yi Jia Guang-Hui Chen Ting-Ting Shu qi-Yong lou Xia Jin Jiang-Yan He Wu-Han Xiao Gang Zhai Zhan Yin College of Fisheries Huazhong Agriculture UniversityWuhanHubei 430070China State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhanHubei 430072China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes Chinese Sturgeon Research InstituteChina Three Gorges CorporationYichangHubei 443100China Hubei Hongshan Laboratory Huazhong Agriculture UniversityWuhanHubei 430070China Innovative Academy of Seed Design Chinese Academy of SciencesBeijing 100049China

Testosterone is closely associated with lipid metabolism and known to affect body fat composition and muscle mass in ***,the mechanisms by which testosterone acts on lipid metabolism are not yet fully understood,especially in *** this study,cyp17a1-/-zebrafish(Danio rerio)exhibited excessive visceral adipose tissue(VAT),lipid content,and up-regulated expression and activity of hepatic de novo lipogenesis(DNL)*** assay for transposase accessible chromatinwithsequencing(ATAC-seq)results demonstrated that chromatin accessibility of DNL genes was increased in cyp17a1-/-fish compared to cyp17a1+/+male fish,including stearoyl-CoA desaturase(scd)and fatty acid synthase(fasn).Androgen response element(ARE)motifs in the androgen signaling pathway were significantly enriched in cyp17a1+/+male fish but not in cyp17a1-/-*** androgen receptor(ar)-/-and wildtype(WT)zebrafish administered with Ar antagonist flutamide displayed excessive visceral adipose tissue,lipid content,and up-regulated expression and activity of hepatic de novo lipogenesis *** Ar agonist BMS-564929 reduced the content of VAT and lipid content,and down-regulated acetyl-CoA carboxylase a(acaca),fasn,and scd ***,the rescue effect of testosterone on cyp17a1-/-fish in terms of phenotypes was abolished when ar was additionally ***,these findings reveal that testosterone inhibits lipid deposition by down-regulating DNL genes via Ar in zebrafish,thus expanding our understanding of the relationship between testosterone and lipid metabolism in teleosts.

关键词： Cyp17a1 Testosterone Androgen receptor De novo lipogenesis Fatty acid synthesis

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黄河口湿地潜在溢油污染生态风险评估

海洋通报 2024年第2期43卷 229-239页

作者：周梦宇娄琦张学庆娄安刚中国海洋大学环境科学与工程学院山东青岛266100 中国海洋大学环境与生态教育部重点实验室山东青岛266100

黄河口有着我国典型的新生湿地生态系统,生态环境非常脆弱,极易受到陆源和海洋污染事故的影响。本文针对黄河口附近海上油田的开发和运输带来的潜在溢油风险,结合溢油污染概率模型以及河口的生态脆弱性,对黄河口湿地潜在溢油污染风险进... 详细信息

黄河口有着我国典型的新生湿地生态系统,生态环境非常脆弱,极易受到陆源和海洋污染事故的影响。本文针对黄河口附近海上油田的开发和运输带来的潜在溢油风险,结合溢油污染概率模型以及河口的生态脆弱性,对黄河口湿地潜在溢油污染风险进行评估。在河口水动力模拟的基础上,采用随机情景模拟法选取300种风和潮流组合作为溢油模拟的强迫条件,分别模拟溢油后72 h和720 h的污染结果,并统计黄河口湿地受溢油污染影响的最大概率和最短时间,采用环境敏感指数表征湿地对溢油污染的敏感程度、危害后果指数量化表征其危害程度及风险矩阵量化风险高低。结果表明黄河口国家公园受潜在溢油污染概率较大,危害后果指数值为29,处于较高危害等级,属于中风险区;河口岸线受潜在溢油污染概率较小,危害后果指数值均小于1,溢油危害后果低,属于低风险区。

关键词：黄河口溢油生态风险危害后果风险矩阵

改良式内镜手术器械挂架预防内镜手术相关感染及仪器污染的效果

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中华医院感染学杂志 2024年第8期34卷 1272-1275页

作者：王雪飞楼奇峰张红台州市立医院内镜中心浙江台州318000 杭州市第一人民医院内镜中心浙江台州310006

目的探讨改良式内镜手术器械挂架在内镜手术配台操作治疗中应用的效果。方法从2018年8月-2019年8月台州市立医院收治的需要进行内镜黏膜剥离术患者62例作为对照组,采取普通内镜手术器械手术台。从2019年9月-2020年9月,选择65例需要进行... 详细信息

目的探讨改良式内镜手术器械挂架在内镜手术配台操作治疗中应用的效果。方法从2018年8月-2019年8月台州市立医院收治的需要进行内镜黏膜剥离术患者62例作为对照组,采取普通内镜手术器械手术台。从2019年9月-2020年9月,选择65例需要进行内镜黏膜剥离术手术的黏膜下肿瘤患者作为研究对象作为研究组,采取改装成的内窥镜手术器械架。采用相同的操作程序、相同的操作人员、相同的手术条件,观察两组手术过程,并记录两组拿取仪器错误次数和取仪器过程中的仪器污染情况。记录两组的内镜黏膜剥离术操作时间。结果对照组拿取附件总出错率15.40%,研究组1.74%,对照组拿取附件出错率更高(P<0.05),研究组手术时间较对照组缩短(P<0.05);对照组附件污染率为12.63%,研究组1.39%,对照组附件污染率高于研究组(P<0.05);研究组手术感染发生率低于对照组(P<0.05)。结论改良式内镜手术器械挂架可有效缩短手术时间,降低手术感染率、手术相关附件污染率、附件取出出错率。值得临床关注。

关键词：内镜黏膜剥离术黏膜下肿瘤内镜手术相关感染改良式内镜手术器械挂架仪器污染

Co-Poisson structures on polynomial Hopf algebras

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Science China Mathematics 2018年第5期61卷 813-830页

作者： qi lou Quanshui Wu School of Mathematical Sciences Fudan University

The Hopf dual H~? of any Poisson Hopf algebra H is proved to be a co-Poisson Hopf algebra provided H is noetherian. Without noetherian assumption, unlike it is claimed in literature, the statement does not hold. It is proved that there is no nontrivial Poisson Hopf structure on the universal enveloping algebra of a non-abelian Lie algebra. So the polynomial Hopf algebra, viewed as the universal enveloping algebra of a finite-dimensional abelian Lie algebra, is considered. The Poisson Hopf structures on polynomial Hopf algebras are exactly linear Poisson structures. The co-Poisson structures on polynomial Hopf algebras are *** correspondences between co-Poisson and Poisson structures are also established.

关键词： Poisson algebra co-Poisson coalgebra Poisson Hopf algebra co-Poisson Hopf algebra

Poisson double extensions

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Science China Mathematics 2020年第4期63卷 701-720页

作者： qi lou Sei-Qwon Oh Shengqiang Wang School of Mathematical Sciences Fudan UniversityShanghai 200433China Department of Mathematics Chungnam National UniversityDaejeon 34134Republic of Korea Department of Mathematics East China University of Science and TechnologyShanghai 200237China

A double Ore extension was introduced by Zhang and Zhang(2008)to study a class of ArtinShelter regular *** we give a definition of Poisson double extension which may be considered as an analogue of the double Ore extension,and show that algebras in a class of double Ore extensions are deformation quantizations of Poisson double *** also investigate the modular derivations of Poisson double extensions and the relationship between Poisson double extensions and iterated Poisson polynomial *** are illustrated by examples.

关键词： Poisson double extension semiclassical limit deformation quantization

Impact of typhoon Lekima(2019)on material transport in Laizhou Bay using Lagrangian coherent structures

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Journal of Oceanology and Limnology 2022年第3期40卷 922-933页

作者： qi lou Zhengyan LI Yanwei ZHANG Yilei FENG Xueqing ZHANG College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Science and Numerical Modeling Ministry of Natural Resources(MNR)Qingdao 266061China

Typhoon has an impact on an estuary and coastal ***,the present research lacks the detailed description of material transport processes during typhoon passage,such as the transport channels and barriers in the course of material transport and material accumulation area,***,Lagrangian coherent structures(a method developed for describing the transport structure of fluids in recent years)was introduced to investigate and predict the floating material and debris transport process in the Laizhou Bay,Bohai Sea,during typhoon Lekima in *** show that the Lagrangian coherent structure could well explain the complex flow phenomena in the *** the typhoon,the general direction of floating material transport in the Laizhou Bay was *** was a channel for material transport in the northwest and south of the bay,and there are transportation obstacles in the northeast-southwest direction in the middle of the ***,the typhoon might worsen the water *** results provide references for precise countermeasures to control the formulation of pollution in the Laizhou Bay.

关键词： material transport typhoon Lagrangian coherent structures Laizhou Bay

The Derivation of Nutrient Criteria for the Adjacent Waters of Yellow River Estuary in China

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Journal of Ocean University of China 2022年第5期21卷 1227-1236页

作者： lou qi ZHANG Xueqing ZHAO Bei CAO Jing LI Zhengyan College of Environmental Science and Engineering Ocean University of ChinaQingdao 266100China North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266033China Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationQingdao 266100China

Ecological protection and high-quality development of the Yellow River basin are becoming part of the national strategy in recent *** Yellow River Estuary has been seriously affected by human ***,it has been severely polluted by the nitrogen and phosphorus from land sources,which have caused serious eutrophication and harmful algal *** criteria,however,was not developed for the Yellow River Estuary,which hindered nutrient management measures and eutrophication risk assessment in this key ecological function zone of *** on field data during 2004-2019,we adopted the frequency distribution method,correlation analysis,Linear Regression Model(LRM),Classification and Regression Tree(CART)and Nonparametric Changepoint Analysis(nCPA)methods to establish the nutrient criteria for the adjacent waters of Yellow River *** water quality criteria of dissolved inorganic nitrogen(DIN)and soluble reactive phosphorus(SRP)are recommended as 244.0μg L^(−1) and 22.4μg L^(−1),*** is hoped that the results will provide scientific basis for the formulation of nutrient standards in this important estuary of China.

关键词： water quality criteria nutrient Yellow River Estuary frequency distribution classification and regression tree eutro-phication

Competition of Stimulated Raman Scattering in H_(2)-CH_(4) Mixed Gases

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Chinese Physics Letters 1999年第10期16卷 718-720页

作者： XU Jian-qiu lou qi-hong DONG Jing-Xing Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800

Competition of stimulated Raman scattering was observed in hydrogen-methane mixed gases pumped by a KrF *** Stokespulse of methane gas oscillated,shortened and was destroyed with the addition ofvarious ratios of hydrogen gas.A model including the feedback of the cell windows as well as competition between hydrogen and methane gas agree well with the experimental observations.

关键词： pumped scattering KrF

Compact All-Fiber 102W Picosecond MOPA Laser with a Narrow Spectral Linewidth

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Chinese Physics Letters 2011年第11期28卷 121-123页

作者： WU Wen-Di REN Ting-qi ZHOU Jun DU Song-Tao GU Xi-Jia lou qi-Hong College of Physics and Engineering Qufu Normal UniversityQufu 273165 Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 Department of Electrical and Computer Engineering Ryerson UniversityTorontoCanada

We report an all-fiber-based master oscillator power amplifier picosecond ytterbium-doped fiber laser with an average power of 102W and a spectral line width of 0.1 *** seed source is a compact single mode passively mode-locked fiber laser with an average power of 2.48 ***,the laser maximum average output power of 102W picosecond pulses is realized by a direct all-fiber amplifier structure in one *** experiment enables the optical-to-optical conversion efficiency to reach 61.4%,with the central wavelength of 1063.7nm.A significant feature of this experiment is the spectral line width of 0.1 *** spectrum has no broadening or nonlinear effects when the pump is strengthened.

关键词： amplifier fiber pump