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Sources and degradation of organic matter in the surface sediments of the Chukchi Sea:insights from amino acids

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Acta Oceanologica Sinica 2023年第11期42卷 9-18页

作者： Weiwei Li Zhongqiao Li Zhuoyi Zhu Alexander Polukhin Youcheng Bai Yang Zhang Futao Fang Haiyan Jin anatolii S.astakhov Xuefa Shi Jianfang Chen Key Laboratory of Marine Ecosystem and Biogechemistry Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Shanghai Key Laboratory of Polar Life and Environment Sciences School of OceanographyShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory for Polar Science of Ministry of Natural Resources Polar Research Institute of ChinaShanghai 201209China Laboratory of Biohydrochemistry Shirshov Institute of OceanologyRussian Academy of SciencesMoscow 117997Russia State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China V.I.Il’ichev Pacific Oceanological Institute Far Eastern BranchRussian Academy of SciencesVladivostok 690012Russia Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China

In the context of global warming and rapid environment change in the Arctic,the supply of organic matter(OM)has increased significantly and a large amount of OM are buried on the Arctic *** the fate of OM in Arctic shelf sediments is crucial to understanding the global carbon *** a marginal sea of the Arctic Ocean,the Chukchi Sea is one of the most critical areas where OM is *** on the surface sediment samples collected during the sixth Chinese National Arctic Research Expedition in the summer of 2014 and the SinoRussian joint Arctic Research Expedition in the summer of 2016,this study takes amino acids(AAs)as the primary tool to explore the source and degradation of OM in the surface sediments of the Chukchi *** study shows that total hydrolyzable amino acid(THAA)concentrations(dry weight)are high,with a mean value of(32.7±15.8)μmol/*** spatial distribution is related to primary productivity,hydrodynamic conditions,sediment properties and other *** source of OM in the surface sediments of the Chukchi Sea is dominated by diatom-dominated marine productivity,with some input from terrestrial ***,as the main source of the D-enantiomer of AA(D-AA),not only have transforming effect on OM,but their cell walls and remnants likewise supply the OM *** on a series of diagenetic indicators,we conclude that the OM in the surface sediments of the Chukchi Sea has undergone extensive degradation[DI(degradation index)=-0.59±0.44],and the degradation degree in the slope is higher than that in the *** study uses AA to explore the sources and degradation of OM in the sediments of the Chukchi Sea,which facilitates our understanding of OM transport and transformation on the Arctic shelf.

关键词： Chukchi Sea amino acids degradation indicator organic matter

北极东西伯利亚陆架黑碳的地球化学特征及其环境意义

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海洋地质与第四纪地质 2022年第4期42卷 50-60页

作者：于文秀胡利民石学法张钰莹叶君白亚之夏逸杨刚 anatolii astakhov 中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室青岛266100 自然资源部第一海洋研究所海洋地质与成矿作用重点实验室青岛266061 青岛海洋科学与技术试点国家实验室海洋地质过程与环境功能实验室青岛266237 俄罗斯科学院远东分院太平洋海洋研究所符拉迪沃斯托克690041

热成因黑碳与气候变化和人类活动关系密切。在全球变暖背景下,这类碳的排放、从陆向海的转移及其环境归宿对于理解北极快速变化下陆源有机碳的源汇过程及其气候环境效应具有重要的科学意义。北极东西伯利亚陆架是全球最为宽浅的陆架,接... 详细信息

热成因黑碳与气候变化和人类活动关系密切。在全球变暖背景下,这类碳的排放、从陆向海的转移及其环境归宿对于理解北极快速变化下陆源有机碳的源汇过程及其气候环境效应具有重要的科学意义。北极东西伯利亚陆架是全球最为宽浅的陆架,接收了大量来自径流和海岸侵蚀输入的陆源物质,尤其近年来环北极野火的频繁发生,因而成为研究北极沉积黑碳源-汇过程的理想区域。本研究对东西伯利亚陆架表层沉积物中黑碳的含量和组成、空间分布特征及其影响因素等进行了研究,结果表明,黑碳的含量为0.1~2.3 mg/g,平均为0.99 mg/g,其中来自生物质燃烧贡献为主的焦炭平均占70%以上。黑碳总体空间分布具有显著的异质性,拉普捷夫海和东西伯利亚海西部地区黑碳含量较高,与海岸侵蚀和河流输入关系密切;陆架东部(包括楚科奇海)陆源输入相对较少,黑碳含量相对较低。不同类型黑碳的空间分布格局显著不同;对于近岸区,来自径流和海岸侵蚀的输入可能是焦炭从陆向海的主要输入方式。

关键词：黑碳源汇表层沉积物北极快速变化东西伯利亚陆架

白令海与西北冰洋表层沉积物粒度分布特征及其环境意义

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海洋地质与第四纪地质 2015年第3期35卷 1-9页

作者：王春娟刘焱光董林森刘大海王国槐李传顺闫仕娟 anatolii astakhov 王汝建中国地质大学(北京)海洋学院北京100083 海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所青岛266061 V 1 II'ichev Pacific Oceanological Institute Far Eastern BranchRussian Academy of Science Vladivostok 690041 同济大学海洋地质国家重点实验室上海200092

基于中国第2次至第5次北极科学考察以及俄罗斯科学院远东分院太平洋海洋研究所提供的表层沉积物样品,开展粒度分析,研究表层沉积物粒度特征及其变化规律对沉积环境的指示意义。白令海与北冰洋表层沉积物类型比较丰富,沉积物主要来源于... 详细信息

基于中国第2次至第5次北极科学考察以及俄罗斯科学院远东分院太平洋海洋研究所提供的表层沉积物样品,开展粒度分析,研究表层沉积物粒度特征及其变化规律对沉积环境的指示意义。白令海与北冰洋表层沉积物类型比较丰富,沉积物主要来源于陆源碎屑,搬运方式以河流、海岸侵蚀、冰筏为主,辅以洋流。沉积物类型主要因为沉积物搬运方式及距离的远近产生差异,白令海北部及楚科奇海南部表层沉积物粒度随着离陆地距离的增大而逐渐减小,高纬地区的沉积物因冰筏沉积作用而分选较差。

关键词：粒度特征沉积物类型环境意义白令海西北冰洋

北极东西伯利亚陆架表层沉积物汞的分布特征及其意义

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海洋地质与第四纪地质 2023年第1期43卷 49-60页

作者：张振虎姚政权胡利民 anatolii astakhov 邹建军刘焱光王昆山杨刚陈志华夏逸李秋玲冯晗石学法自然资源部第一海洋研究所海洋地质与成矿作用重点实验室青岛266061 青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室青岛266237 中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室青岛266100 俄罗斯科学院远东分院太平洋海洋研究所符拉迪沃斯托克(海参崴)69004

全球变暖导致北极地区冻土退化、海冰消融、河流径流增加及海洋动力发生变化,这些因素连同日益增加的人类活动都影响北冰洋中汞的输入和运移。对取自北极东西伯利亚陆架的87个表层沉积物进行了汞含量测试与分析,发现沉积物中汞含量的分... 详细信息

全球变暖导致北极地区冻土退化、海冰消融、河流径流增加及海洋动力发生变化,这些因素连同日益增加的人类活动都影响北冰洋中汞的输入和运移。对取自北极东西伯利亚陆架的87个表层沉积物进行了汞含量测试与分析,发现沉积物中汞含量的分布有显著的空间差异性,可分为近岸低汞区(33 ng/g)、陆架中部汞含量中等区(58 ng/g)和北部深水高汞区(84ng/g)。总体来看,从近岸向外海,汞含量随水深的增大而升高。结合沉积物粒度、有机碳和比表面积等指标,发现东西伯利亚陆架沉积物中黏土含量与汞含量呈现正相关,显示了沉积物粒度对汞分布的控制作用。近岸由于受河流输入、海岸侵蚀和环流分选等因素的影响,沉积物粒径较粗,导致汞含量较低,而北部陆架深水区的细粒沉积物则吸附了更多的汞。在楚科奇海和拉普捷夫海,沉积汞含量和总有机碳含量有较强的正相关性,而在东西伯利亚海相关性较弱,这可能是因为东西伯利亚海的沉积有机碳来源相对更为复杂。基于沉积汞的富集因子指标,我们认为北极东西伯利亚陆架沉积汞的污染水平整体较低,受人类活动的影响相对较弱。

关键词：表层沉积物汞含量污染水平北极东西伯利亚陆架

北极东西伯利亚陆架表层沉积生物硅分布特征及环境意义

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矿物岩石地球化学通报 2023年第4期42卷 717-727页

作者：杨功旭姚政权冯晗胡利民 anatolii astakhov 邹建军刘焱光王昆山 Alexander Bosin Yuri Vasilenko 杨刚石学法自然资源部第一海洋研究所海洋地质与成矿作用重点实验室山东青岛266061 崂山实验室海洋地质过程与环境功能实验室山东青岛266237 中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室山东青岛266100 俄罗斯科学院远东分院太平洋海洋研究所符拉迪沃斯托克(海参崴)690041

揭示北冰洋陆架区初级生产力变化及其控制因素,对评估北极在全球变化中的地位具有重要意义。本文对北极东西伯利亚陆架87个表层沉积生物硅进行了测试与分析,结果显示,东西伯利亚陆架表层沉积生物硅含量为0.42%~14.11%(平均值为3.12%),... 详细信息

揭示北冰洋陆架区初级生产力变化及其控制因素,对评估北极在全球变化中的地位具有重要意义。本文对北极东西伯利亚陆架87个表层沉积生物硅进行了测试与分析,结果显示,东西伯利亚陆架表层沉积生物硅含量为0.42%~14.11%(平均值为3.12%),大致以165°E~170°E为界,界限以西的拉普捷夫海和东西伯利亚海西部生物硅含量较低(平均值为1.56%),界限以东的东西伯利亚海东部和楚科奇海中西部生物硅含量较高(平均值为9.7%)。综合分析表明,生物硅高值区主要是东西伯利亚海东部及楚科奇海受季节性海冰及太平洋入流水携带更多的营养物质造成的,而低值区除受常年海冰覆盖影响外,河流径流量增加和硅质生物的溶解作用也会导致生物硅含量降低。生物泵效率指标揭示东西伯利亚陆架海域,特别是楚科奇海可能是吸收全球大气CO_(2)的重要汇区。

关键词：生物硅海冰初级生产力东西伯利亚陆架北极

北极东西伯利亚陆架陆源有机碳的跨陆架输运及其环境效应

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北极东西伯利亚陆架陆源有机碳的跨陆架输运及其环境效应

Human chemerin induces eryptosis at concentrations exceeding circulating levels

第十七届全国古地理学及沉积学学术会议

作者：孙一方胡利民姚政权叶君杜佳宗石学法 anatolii astakhov 中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室自然资源部第一海洋研究所海洋沉积与成矿作用重点实验室

北极周围陆地区域储存的陆源有机碳(TerrOC)含量相当于大气中碳含量的2倍,而TerrOC很大一部分存在于北极冻土沉积物中。气候变暖导致北极储存的永久冻土大规模融化,释放大量陆源有机碳,这些有机碳经河流输入和海岸侵蚀进入海洋,可能埋...

北极周围陆地区域储存的陆源有机碳(TerrOC)含量相当于大气中碳含量的2倍,而TerrOC很大一部分存在于北极冻土沉积物中。气候变暖导致北极储存的永久冻土大规模融化,释放大量陆源有机碳,这些有机碳经河流输入和海岸侵蚀进入海洋,可能埋藏在海底沉积物、输运至深海区域或被降解成温室气体进入到大气,不同的归宿会对北极气候环境产生不同的反馈。因此,需要进一步了解不同源区陆源有机碳入海后的输运及其沉积归宿,

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BIOCELL 2024年第8期48卷 1197-1208页

作者： MARYNA TKACHENKO anatolii ONISHCHENKO LILIYA TRYFONYUK DMYTRO BUTOV KATERYNA KOT VIKTORIIA NOVIKOVA LIWEI FAN VOLODYMYR PROKOPIUK YURII KOT ANTON TKACHENKO Department of Internal Medicine No.2 Clinical Immunology and AllergologyKharkiv National Medical UniversityKharkiv61022Ukraine Research Institute of Experimental and Clinical Medicine Kharkiv National Medical UniversityKharkiv61022Ukraine Institute of Health National University of Water and Environmental EngineeringRivne61022Ukraine Department of Infectious Diseases and Phthisiology Kharkiv National Medical UniversityKharkiv61022Ukraine Biochemistry Department V.N.Karazin Kharkiv National University Ministry of Education and Science of UkraineKharkiv61022Ukraine Department of Chemistry BiochemistryMicrobiology and Food HygieneState Biotechnological UniversityKharkiv61022Ukraine Clinical Research Innovation Lab Floor 26 Block D Qidi Technology Building 8Tsinghua Technology ParkBeijing100084China Department of Cryobiochemistry Institute for Problems of Cryobiology and Cryomedicine of the National Academy of Sciences of UkraineKharkiv61015Ukraine

Introduction:Human chemerin is an adipokine that regulates chemotaxis,inflammation,and glucose *** addition,accumulating evidence suggests that chemerin promotes apoptosis,autophagy,and ***,there are no data on its impact on *** current study aimed to analyze the effects of human active Glu^(21)-Ser^(157) chemerin on eryptosis in *** and Methods:Human chemerin 0-2-10-50μg/mL was incubated for 24 h with human erythrocytes(hematocrit 0.4%)obtained from eight healthy *** cytometry-based determination of phospholipid scrambling,reactive oxygen species(ROS)production,and intracellular Ca^(2+)levels was *** supplement data on ROS and Ca^(2+)signaling in chemerin-mediated eryptosis,incubation in the presence or absence of antioxidants vitamin C and N-acetylcysteine and Ca^(2+)-binding agent EGTA was carried out,*** microscopy-based techniques were used to detect reactive nitrogen species(RNS)generation,involvement of caspase-3 and caspase-8,as well as the state of lipid order in cell membranes of erythrocytes exposed to human Glu^(21)-Ser^(157) ***:Our observations suggest that human Glu^(21)-Ser^(157) chemerin had no impact on eryptosis parameters at 2μg/***,chemerin stimulated phosphatidylserine externalization,ROS production,and Ca^(2+)accumulation at higher concentrations suggesting activation of ***^(2+)uptake turned out to be at least partly required for chemerin-mediated ***-mediated erythrotoxicity was additionally mediated by RNS,caspase-3,and ***,Glu^(21)-Ser^(157) chemerin promoted reduction in the liquid-ordered phase of cell membranes in ***:The present study first discloses that human chemerin can induce eryptosis via Ca^(2+)-dependent mechanisms at concentrations noticeably exceeding circulating ***,chemerin-induced eryptosis can hardly contribute to eryptosis-mediated anemia in disease

关键词： Adipokine Cell death Chemerin Oxidative stress Eryptosis

Effect of pulsed magnetic field pre-treatment of AISI 52100 steel on the coefficient of sliding friction and wear in pin-on-disk tests

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Friction 2014年第4期2卷 310-316页

作者： anatolii BABUTSKYI Andreas CHRYSANTHOU Chuanli ZHAO School of Engineering and Technology University of HertfordshireHatfieldUK

Disc specimens manufactured from commercial bearing rollers(AISI 52100 steel,62−63 HRC)in initial state and after pre‐treatment by pulsed magnetic field(PMF)with a magnetic field strength of 1−7 MA/m were tested with sunflower oil using pin‐on‐disk *** to the obtained results the treatment causes a reduction in the coefficient of friction and *** explain the results,nano‐and microhardness tests as well as optical and atomic force microscopy were *** of the effect of PMF on the friction and wear were discussed.

关键词： bearing rollers pulsed magnetic field

Arctic source for elevated atmospheric mercury(Hg^0) in the western Bering Sea in the summer of 2013

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Journal of Environmental Sciences 2018年第6期30卷 114-121页

作者： V.V.Kalinchuk V.F.Mishukov A.S.astakhov V.I.Il'ichev Pacific Oceanological Institute of Far Eastern Branch of Russian Academy of Sciences Vladivostok Russia

Measurements of gaseous elemental mercury（Hg^0） in the marine boundary layer of the western Bering Sea were performed using an automatic mercury analyzer RA 915 ＋（Ltd. ＂Lumex＂, St. Petersburg, Russia） aboard the Russian research vessel Academician *** from 3 to 20 August 2013. Hg^0 concentrations varied from 0.3 to 2.1 ng/m^3（n = 4783）;the average value（1.1 ± 0.3 ng/m^3） was lower than both the background range of the Northern Hemisphere（1.5–1.7 ng/m^3） and average values previously observed in the Bering Sea, and corresponded to the background concentrations of the Southern Hemisphere（1.1–1.3 ng/m^3）.Maximum Hg^0 concentrations were observed within air masses that came from the lower troposphere of the central Arctic. Under these conditions, Hg^0 ranged between 1.1 and 2.1 ng/m^3 with an average of 1.5 ± 0.2 ng/m^3（n = 1183）. Except for these periods, Hg^0 concentrations during the rest of the study varied from 0.3 to 1.8 ng/m^3, with an average value of 1.0 ± 0.2 ng/m^3（n = 3600）. Our results support the hypothesis that, in the summer, air masses from the central Arctic Ocean can be an exporter of mercury to lower latitudes. Perhaps the atmospheric transport of elevated concentrations of Hg^0 into lower latitudes may have implications for the biologic and economic health of important fisheries, such as the Bering Sea.

关键词： Mercury Atmosphere Long-range transport Bering Sea Arctic