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Distribution, burial fluxes and carbon sink effect of sedimentary organic carbon in the eastern China seas

Science China Earth Sciences 2024年第10期67卷 3062-3082页

作者： Xuefa SHI Bin WU Shuqing QIAO Zhengquan YAO limin hu Yazhi BAI Shan hu Jie SHENG Yanguang LIU Shengfa LIU Kunshan WANG Jianjun ZOU Key Laboratory of Marine Geology and Metallogeny First Institute of Oceanography Ministry of Natural Resources Laboratory for Marine Geology Qingdao Marine Science and Technology Center Key Laboratory of Deep Sea Mineral Resources Development Shandong Province (Preparatory) Key Laboratory of Submarine Geosciences and Technology College of Marine Geosciences Ocean University of China

The ocean is the largest active carbon reservoir on Earth. Organic carbon（OC）, as the primary species of carbon sequestration in the ocean, plays an important role in the global carbon cycle through its deposition and burial. In this study,sedimentary OC data from 5796 stations, together with relevant geochemical and sedimentological parameters in the Bohai Sea,Yellow Sea, and East China Sea（BYES） were used to summarize and elucidate the distribution and burial patterns of sedimentary OC, and assess carbon sink effect of sedimentary OC burial. The results show that the OC content in the sediments of the BYES ranges from 0.00% to 2.12%, with an average content of 0.47%±0.26%. OC content is significantly correlated with finegrained sediments, with an average OC content in mud areas being 39% higher than that in non-mud areas. Modern OC buried in the BYES are mainly deposited in 7 major mud areas, with a total sedimentary OC burial flux of approximately 8.20 Mt C yr–*** them, the burial flux of biospheric OC is 6.92 Mt C yr–1, equivalent to the OC consumption amount of silicate weathering of the 9 major river basins in the eastern China. In its natural state, the annually sequestered OC in the sediments of the eastern China seas is equivalent to 25.37 Mt of atmospheric CO2, indicating a significant carbon sink effect. The distribution and burial of terrigenous OC in the BYES are mainly influenced by the large river inputs and complex marine hydrodynamic environment,while human activities such as dam construction have significantly altered the OC burial in these coastal mud areas.

关键词： Sedimentary organic carbon Burial flux Carbon sink effect Carbon cycle Eastern China seas

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媒体融合背景下广电节目制播优化路径探究

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新闻研究导刊 2024年第9期15卷 95-97页

作者：胡丽敏锦州北镇市融媒体中心辽宁北镇121300

媒体融合时代,互联网、移动通信等技术广泛应用,传统的广电节目制播方式亟须转型升级。广电媒体也须探寻优化广电节目制播的有效路径,提高广电节目质量。文章首先分析媒体融合在广电节目制播中的优势体现,进而深入探索媒体融合背景下广... 详细信息

媒体融合时代,互联网、移动通信等技术广泛应用,传统的广电节目制播方式亟须转型升级。广电媒体也须探寻优化广电节目制播的有效路径,提高广电节目质量。文章首先分析媒体融合在广电节目制播中的优势体现,进而深入探索媒体融合背景下广电节目制播优化路径。研究发现,媒体融合在广电节目制播中的优势主要体现在:传播渠道整合化、媒体优势互补化。文章认为,为进一步优化广电节目制播水平,广电媒体需充分发挥这些优势,转变节目制播思维,遵循发展规律,强化开放性思维,顺应媒体融合趋势;深入挖掘技术资源,运用“5G+”多技术融合、数字编辑技术、交互技术、运动追踪技术等技术,优化观众体验;提高观众参与度,建立集上传、评论等功能于一体的个人素材收集平台,鼓励观众主动参与到节目内容的创制过程中,进而形成间接营销。

关键词：媒体融合广电行业节目制播 “5G+”多技术融合

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高校学生社团育人功能提升策略研究

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成才之路 2024年第6期 5-8页

作者：胡丽敏安秋亭扬州工业职业技术学院江苏扬州225127

高校学生社团作为重要的学生群众组织,是落实立德树人根本任务的重要载体,也是促进学生全面发展的育人平台。受各种因素制约,当前部分高校学生社团价值引领效果不佳、社团管理制度不健全、社团育人资源空间有限、社团运作专业指导匮乏... 详细信息

高校学生社团作为重要的学生群众组织,是落实立德树人根本任务的重要载体,也是促进学生全面发展的育人平台。受各种因素制约,当前部分高校学生社团价值引领效果不佳、社团管理制度不健全、社团育人资源空间有限、社团运作专业指导匮乏。要提升学生社团育人功能,高校需要根据社团文化和青年特征,强化社团思想价值引领、健全社团运行管理机制、完善社团资源供给配置、打造社团特色文化品牌,从而实现社团育人的时代价值。

关键词：高校社团育人功能立德树人价值引领

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水库调控下黄河口沉积有机碳的分布、来源与输运特征

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海洋地质与第四纪地质 2024年第2期44卷 120-130页

作者：党瑶刘夙睿王厚杰卢泰安吴晓毕乃双胡利民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 黄河水利委员会山东水文水资源局利津水文站东营257400

黄河是全球输沙量最大的河流之一,陆源颗粒有机碳通量高。然而,近年来流域水库调控对黄河下游水文格局和颗粒有机碳输送产生了重要影响,小浪底水库调水调沙时期成为黄河水沙和有机碳入海的关键时段。为揭示水库调控对河口水动力和有机... 详细信息

黄河是全球输沙量最大的河流之一,陆源颗粒有机碳通量高。然而,近年来流域水库调控对黄河下游水文格局和颗粒有机碳输送产生了重要影响,小浪底水库调水调沙时期成为黄河水沙和有机碳入海的关键时段。为揭示水库调控对河口水动力和有机碳分布的影响机制,基于2020年7月调水期和调沙期黄河口的水动力观测结果,结合沉积物有机碳测试结果,研究了水库调控不同阶段下河口沉积物粒度参数和表层沉积物有机碳的时空分布。研究结果表明,水库不同阶段下悬浮颗粒物的物源和主要扩散、沉积区域的变化,使得黄河口表层沉积物的粒度组成特征发生明显变化;在高径流量的调水期期间,粗颗粒泥沙携带颗粒有机碳在河口距离口门12 km范围内大量埋藏,河口区域表层沉积物的有机碳含量相较于调沙期明显偏低。调水期黄河口陆源有机碳主要来自下游河床冲刷,颗粒较粗,调沙期则转变为水库释放的细颗粒有机碳和流域C3维管植物碎屑。水库调控的不同阶段使得黄河下游河流水动力格局和泥沙运输机制改变,从而引起黄河口沉积有机碳来源和分布的显著变化。因此,人类活动对调节有机碳向海洋的输送及其在近岸海域的分布具有主导性作用。

关键词：调水调沙颗粒有机碳沉积物输运黄河口

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北黄海西部泥质区全新世以来沉积有机碳埋藏特征

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海洋地质与第四纪地质 2024年第2期44卷 110-119页

作者：王培杰胡利民闫天浩王厚杰毕乃双王楠张洋吴晓中国海洋大学海洋地球科学学院青岛266100 中国海洋大学海底科学与探测技术教育部重点实验室青岛266100 中国海洋大学深海圈层与地球系统前沿科学中心青岛266100

北黄海西部泥质区沉积环境稳定、沉积记录连续,是重建过去周边流域变化与黄海海洋环境信息的良好载体。目前围绕北黄海西部泥质区沉积有机碳的研究工作多局限于通过表层沉积物揭示其现代分布特征,对于该泥质区长时间尺度沉积有机碳埋藏... 详细信息

北黄海西部泥质区沉积环境稳定、沉积记录连续,是重建过去周边流域变化与黄海海洋环境信息的良好载体。目前围绕北黄海西部泥质区沉积有机碳的研究工作多局限于通过表层沉积物揭示其现代分布特征,对于该泥质区长时间尺度沉积有机碳埋藏过程与机制的研究相对薄弱。通过北黄海西部泥质区W03岩芯的总有机碳指标,重建了全新世以来北黄海西部沉积有机碳的埋藏特征,探讨了气候及海洋环境变化对北黄海西部沉积有机碳埋藏的控制机制。研究表明:海平面上升的停滞期(10.3~9.8 ***),发育硬质黏土层,有机碳以陆源输入为主(60.7%),动荡的沉积环境导致总有机碳含量相对较低,平均含量仅为0.22%;海平面上升期(9.8~7.0 ***),海源有机碳的贡献增加(47.7%),相对稳定的沉积环境有利于该时期有机碳的埋藏;高海平面以来(7.0 ***至今),黄海环流体系逐渐形成,陆源有机碳输入随着东亚冬季风驱动的沿岸流强度变化发生相应的改变,海源有机碳的贡献继续增加(50.0%),总有机碳的含量升高至0.58%。北黄海西部泥质区全新世以来沉积有机碳埋藏主要受控于海平面变化和海洋环流体系的运动。

关键词：泥质区全新世沉积有机碳北黄海

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Recent advances in persulfate-based advanced oxidation processes for organic wastewater treatment

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Chinese Chemical Letters 2022年第10期33卷 4461-4477页

作者： Ke Tian limin hu Letian Li Qingzhu Zheng Yanjun Xin Guangshan Zhang College of Resource and Environment Qingdao Engineering Research Center for Rural EnvironmentQingdao Agricultural UniversityQingdao 266109China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China

In recent years,with the emergence of new pollutants,the effective treatment of wastewater has become very ***-based advanced oxidation processes have been successfully applied to the treatment of wastewater,such as wastewater containing antibiotics,pharmaceuticals and personal care products,dyes,endocrine-disrupting chemicals,chlorinated organic pollutants,and phenolics,for the degradation of refractory organic *** paper summarizes the production of sulfate radicals,which can be generated by the activation of persulfate via conventional and emerging *** existing problems of persulfate-based advanced oxidation processes were analyzed in detail,including residual sulfates,coexisting factors(coexisting inorganic anions and natural organic matter),and energy *** paper proposes corresponding possible solutions to the problems mentioned above,and this paper could provide a reference for the application of persulfate-based advanced oxidation processes in actual wastewater treatment.

关键词： Persulfate Sulfate radical Activation Organic wastewater Advanced oxidation processes

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基因编辑技术在大豆基因功能鉴定及遗传改良上的应用

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植物遗传资源学报 2024年第6期25卷 919-930页

作者：刘佳瑞张钰彭国庆齐照明陈庆山辛大伟胡利民东北农业大学智慧农场技术与系统全国重点实验室/大豆生物学教育部重点实验室哈尔滨150030

大豆作为重要的粮食作物和油料作物,在人类生产生活中扮演着十分重要的角色。近年来国内大豆供给孱弱,对外依存度过高,使国内大豆市场受到严重冲击,并给国家粮食安全带来一定隐患,因此培育优质高产的大豆品种是当前国内大豆育种的重要... 详细信息

大豆作为重要的粮食作物和油料作物,在人类生产生活中扮演着十分重要的角色。近年来国内大豆供给孱弱,对外依存度过高,使国内大豆市场受到严重冲击,并给国家粮食安全带来一定隐患,因此培育优质高产的大豆品种是当前国内大豆育种的重要目标。目前,大豆中一批控制重要性状的关键基因已经被克隆和解析,为开展分子设计育种提供了重要的理论支撑。传统育种周期长、效率较低,基因编辑技术为生物育种提供了新的途径和工具,可以加速育种进程。以CRISPR/Cas9技术为代表的基因编辑技术已经快速发展成为大豆基因功能研究、改造及农艺性状遗传改良的重要工具。本文介绍了基因编辑技术的类型、特点及其在植物中的应用概况,并综述了其在大豆产量、品质、抗病、抗逆、开花期、共生固氮和育性等农艺性状研究中的最新研究进展,为开展大豆基因编辑育种提供了一定的依据和借鉴。此外,本文还探讨了基因编辑技术在大豆遗传改良中存在的问题,并对其应用前景进行了展望。

关键词：大豆基因编辑技术遗传改良育种

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The effect of iron on the preservation of organic carbon in marine sediments and its implications for carbon sequestration

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Science China Earth Sciences 2023年第9期66卷 1946-1959页

作者： limin hu Yuhan JI Bin ZHAO Xiting LIU Jiazong DU Yantao LIANG Peng YAO College of Marine Geosciences Key Laboratory of Submarine Geosciences and Prospecting TechniquesMinistry of EducationOcean University of ChinaQingdao 266100China Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao 266100China College of Marine Life Sciences Ocean University of ChinaQingdao 266100China

Marine sediments are the most significant reservoir of organic carbon(OC)in Earth′s surface ***,a crucial component of the marine biogeochemical cycle,has a considerable impact on marine ecology and carbon *** the effect of iron on the preservation of OC in marine sediments is essential for comprehending biogeochemical processes of carbon and climate *** review summarizes the methods for characterizing the content and structure of iron-bound OC and explores the influencing mechanism of iron on OC preservation in marine sediments from two aspects:the selective preservation of OC by reactive iron minerals(iron oxides and iron sulfides)and iron redox *** selective preservation of sedimentary OC is influenced by different types of reactive iron minerals,OC reactivity,and functional *** iron redox process has dual effects on the preservation and degradation of *** considering sedimentary records of iron-bound OC across diverse marine environments,the role of iron in long-term preservation of OC and its significance for carbon sequestration are *** research should focus on identifying effective methods for extracting reactive iron,the effect of diverse functional groups and marine sedimentary environments on the selective preservation of OC,and the mediation of *** work will help elucidate the influencing mechanisms of iron on the long-term burial and preservation of OC and explore its potential application in marine carbon sequestration to maximize its role in achieving carbon neutrality.

关键词： Marine sedimentary organic carbon Reactive iron minerals Iron-bound organic carbon Selective preservation Carbon sequestration

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Safety Research in Traditional Chinese Medicine: Methods, Applications, and Outlook

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Engineering 2019年第1期5卷 76-82页

作者： Yue Gao Aihua Liang Xiaohui Fan limin hu Feiran Hao Yubo Li Institute of Radiation Medicine Academy of Military Medical Sciences Beijing 100850 China Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing 100700 China Pharmaceutical Informatics Institute College of Pharmaceutical Sciences Zhejiang University Hangzhou 310058 China Tianjin State Key Laboratory of Modern Chinese Medicine School of Chinese Materia Medica Tianjin University of Traditional Chinese Medicine Tianjin 300193 China

Traditional Chinese medicine (TCM) is a medical system that has collected and summarized abundant clinical experience over its long history of more than 2000 years. However, the frequent occurrence of TCM-induced adverse reactions has hindered the modernization and internationalization of TCM, while attracting increasing attention from around the world. Unlike chemical drugs and biological agents, the difficulties involved in research on the toxicity and safety of TCM mainly include the complexity of its components and the unpredictability of drug–body interactions. Much of TCM, which has overall therapeutic effects, has the typical mechanisms of multiple components, multiple pathways, and multiple targets. While considering the gradualness and unpredictability of TCM toxicity, the ambiguity of toxicants and safe dosage, and individual differences during long-term TCM administration, we have systematically established key techniques for the toxicity assessment of TCM. These techniques mainly include TCM toxicity discovery in an early phase, based on a combination of drug toxicology genomics and metabolomics;methods to identify dose–toxicity relationships in TCM;and integrated techniques for the exploration of TCM interactions, such as fast-screening tests based on drug-metabolizing enzymes and receptor pathways. In particular, we have developed a new technical system for TCM safety evaluation using molecular toxicology, which has been validated well in research on TCM compatibility contraindication, quality control, and allergen discovery. The application of this key technical platform is introduced here in detail. This application includes model organisms, toxicant biomarkers, a magnetic suspension technique, and the application of network toxicology and computational toxicology in research on the toxicity of Fructus toosendan, Semen cassiae, Polygonum multiflorum, and Fructus psoraleae.

关键词： Traditional Chinese medicine Safety Methods and technical platform Toxicity Mechanism

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Coupled δ^(15)N_(TN) and δ^(13)C_(TOC) Insights into Methane Seepage Activities in Bulk Marine Sediments of the Qiongdongnan Basin, South China Sea

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Journal of Ocean University of China 2022年第6期21卷 1495-1503页

作者： MIAO Xiaoming FENG Xiuli hu limin LI Jingrui LIU Xiting WANG Nan XIAO Qianwen WEI Jiangong College of Marine Geosciences Ocean University of Chinathe Key Laboratory of Submarine Geosciences and Prospecting TechniquesQingdao 266100China Deep-Sea Multidisciplinary Research Center&Laboratory for Marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266037China MLR Key Laboratory of Marine Mineral Resources Guangzhou Marine Geological SurveyGuangzhou 510075China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China

Recently,methane seepage related to the dissociation of natural gas hydrates has attracted much attention,which has a significant impact on the study of the global carbon and nitrogen *** on the detailed geochemical analyses of sediments(core Q6)from the Qiongdongnan Basin,South China Sea,three methane seepage activities were identified and the exact horizons of anaerobic oxidation of methane(AOM)were ***,organic carbon isotopic(δ^(13)C_(TOC))levels ranged from−23.6‰–−20.6‰PDB;nitrogen isotopes(δ^(15)N_(TN))of the same sedimentary samples ranged from 1.8‰–5.3‰.We also found obvious simultaneous negative excursions of organic carbon isotopes(δ^(13)C_(TOC))and nitrogen isotopes(δ^(15)N_(TN))in the horizons of methane *** with the normal sediments,their maximum negative excursions were 2.6‰and 2.5‰,*** discuss in detail the various characteristics ofδ^(15)N_(TN) andδ^(13)C_(TOC) levels in sediments and their coupling responses to methane seepage *** believe that the methane seepage events changed the evolution trajectory ofδ^(15)N_(TN) andδ^(13)C_(TOC) levels in sediment records,which resulted in the simultaneous negative *** phenomenon is of great significance to reveal the historical dissociation of natural gas hydrates and their influence on the deep-sea carbon and nitrogen pool.

关键词： methane seepage TS/TOC nitrogen isotopes organic carbon isotopes South China Sea

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