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Seasonal variability in dissolved oxygen in the Bohai Sea,China

Journal of Oceanology and Limnology 2022年第1期40卷 78-92页

作者： yaozu chen Fangguo ZHAI Yanzhen GU Jing CAO Cong LIU Xingchuan LIU Zizhou LIU Peiliang LI School of Marine Sciences Sun Yat-Sen UniversityZhuhai 519082China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China North China Sea Environmental Monitoring Center State Oceanic AdministrationQingdao 266000China Institute of Physical Oceanography and Remote Sensing Ocean CollegeZhejiang UniversityZhoushan 316021China Hainan Institute of Zhejiang University Sanya 572024China

Deoxygenation has frequently appeared in coastal ecosystems over the past century due to the joint infl uence of increasing anthropogenically induced nutrient inputs and global warming.The semi-enclosed Bohai Sea is a typical system that is prone to deoxygenation,with regular hypoxia events consistently recorded in recent decades.Based on in-situ observation data collected in large-scale voyage surveys in the Bohai Sea during 2008-2017,the seasonal variability in dissolved oxygen(DO)and its controlling mechanisms were studied.The results indicated that in spring and autumn,the DO distributions exhibited similar spatial patterns in the surface and bottom layers,while in summer,its spatial distribution was characterized by large-scale oxygen-poor zones distributed off the Qinhuangdao Coast and the central southern Bohai Sea in the bottom layer.The controlling mechanisms of the DO distribution varied from season to season.Spring and autumn DO distributions were dominated by the seawater temperature.Under the combined eff ects of stratifi cation and decomposition,the summer bottom DO exhibited dual-core distribution.On the one hand,stratifi cation could greatly impede vertical mixing,resulting in reduced bottom DO replenishment.On the other hand,the increased bottom organic matter intensifi ed the decomposition processes,inducing massive DO consumption and elevated dissolved inorganic nitrogen concentrations.In addition,the stronger stratifi cation might be the reason for the more severe deoxygenation in the southern oxygen-poor zones in summer.Our study provides guidance for an in-depth understanding of the DO seasonality in the Bohai Sea and the mechanisms that modulate it and for the improvement of hypoxia forecasts in ocean models.

关键词： dissolved oxygen seasonal variability mechanism the Bohai Sea

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Climatology and seasonal variability of satellite-derived chlorophyll a around the Shandong Peninsula

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Journal of Oceanology and Limnology 2021年第4期39卷 1222-1244页

作者： Xiukai SONG Yanzhen GU Fangguo ZHAI Peiliang LI Pengxia LIU Zizhou LIU Wenfan WU yaozu chen Xiangyang JIANG Jianlong HE Shandong Marine Resources and Environment Research Institute Shandong Provincial Key Laboratory of Restoration for Marine EcologyYantai 264006China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Institute of Physical Oceanography and Remote Sensing Ocean CollegeZhejiang UniversityZhoushan 316021China Hainan Institute of Zhejiang University Sanya 572025China

The chlorophyll a(Chl a)is an important indicator of marine ecosystems.The spatiotemporal variation of the Chl a greatly aff ects the mariculture and marine ranching in coastal waters of the Shandong Peninsula.In the current study,the climatology and seasonal variability of surface Chl-a concentration around the Shandong Peninsula are investigated based on 16 years(December 2002-November 2018)of satellite observations.The results indicate that the annual mean Chl-a concentration is greater in the Bohai Sea than in the Yellow Sea and decreases from coastal waters to off shore waters.The highest Chl-a concentrations are found in Laizhou Bay(4.2-8.0 mg/m^(3)),Haizhou Bay(4.2-5.9 mg/m^(3))and the northeast coast of the Shandong Peninsula(4.4-5.0 mg/m^(3)),resulting from the combined eff ects of the intense riverine input and long residence time caused by the concave shape of the coastline.The seasonal Chl-a concentration shows a significant spatial variation.The Chl-a concentrations in these three subregions generally exhibit an annual maximum in August/September,due to the combined eff ects of sea surface temperature,river discharge and sea surface wind.In the southeast coast region,however,the Chl-a concentration is lowest throughout the year and reaches a maximum in February with a minimum in July,forced by the seasonal evolution of the Yellow Sea Cold Water and monsoon winds.The interannual Chl-a concentration trends vary among regions and seasons.There are significant increasing trends over a large area around Haizhou Bay from winter to summer,which are mainly caused by the rising sea surface temperature and eutrophication.In other coastal areas,the Chl-a concentration shows decreasing trends,which are clearest in summer and induced by the weakening land rainfall.This study highlights the differences in the Chl-a dynamics among regions around the Shandong Peninsula and is helpful for further studies of coupled physical-ecological-human interactions at multiple scales.

关键词： chlorophyll-a concentration Shandong Peninsula climatology seasonal variability Yellow Sea Cold Water

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Diterpenoids from Rabdosia Nervosa

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Chemical Research in Chinese Universities 1989年第3期5卷 250-254页

作者： Bai Guang, chen yaozu and Meng Xianjun (Department of Chemistry, Lanzhou University, Lanzhou)

Six ent-kaurene type diterpenoids were isolated from the leaves of Rabdosia nerwsa. Among them.ganer-vosin A and B are new compounds, the structures of which were elucidated as 1 and 2 respectively by spectral and chemical methods. The other four were identified as odonicin (3), novelrabdosin (4), nodosin (5) and shikokianal acetate (8). Compounds (1), (2), (5) and (8) have not been found in this herb previously.

关键词： Rabdosia nervosa Diterpenoids Herb

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SPIN-LABELED ANTITUMOR DERIVATIVES OF PODOPHYLLOTOXIN

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Science in China,Ser.B 1987年第10期30卷 1070-1079页

作者：陈耀祖张长久田暄 Department of Chemistry Lanzhou University

Three spin-labeled antitumor derivatives of podophyllotoxin, containing an iminoxyl radical,have been synthesized.Preliminary pharmacological tests showed that these derivatives have significant antitumor activity in several experimental tumor systems with a marked decrease in toxicity compared with the parent compound.The relative intensities of ESR signals of these spin-labeled compounds were linearly proportional to their concentrations, the levels of the agent in blood and organs of mice or rabbits can be measured via ESR spectrometry.

关键词： ESR OC GP

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一类活动发射平台驱动控制系统网络设计

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Aerospace China 2023年第3期24卷 26-30页

作者： LI Daoping ZHU Maioxin LI Chunlin chen yaozu ZHENG Guokun Beijing Institute of Space Launch Technology 100076

In order to ensure that a mobile launch platform is able to transport a launch vehicle which is assembled vertically on a complex orbit,a communication network for the drive control system was designed.Based on the char-acteristics of equipment of the drive control system and its position,Industrial Ethernet and Profibus were selected.To meet the requirements for reliability and maintainability of aerospace products,the communication network featured a hot redundant to avoid single point failure risk,so that if any point in the system fails,the control strategy of standby switches using heartbeat detection and parity check would ensure the normal communication and failure diagnostics,which could enable the transport mission of the launch vehicle to be completed smoothly.

关键词： mobile launch platform drive control system communication network Industrial Ethernet Profibus hot redundancy

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基于包络面积算法的人体平衡测试仪系统研究

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传感器与微系统 2023年第9期42卷 35-38页

作者：陈耀祖谷玉海杨凯徐小力北京信息科技大学现代测控技术教育部重点实验室北京100192 北京信息科技大学机电工程学院北京100192

目前大多数脑卒中、偏瘫等患者存在着严重的平衡功能障碍,通过采用人体平衡测试仪能够定量、客观地评定被测试者的平衡能力。本文对人体重心包络面积算法进行了研究,设计了重心坐标点的计算方法,编写了人体平衡测试仪系统。经测试,平衡... 详细信息

目前大多数脑卒中、偏瘫等患者存在着严重的平衡功能障碍,通过采用人体平衡测试仪能够定量、客观地评定被测试者的平衡能力。本文对人体重心包络面积算法进行了研究,设计了重心坐标点的计算方法,编写了人体平衡测试仪系统。经测试,平衡测试仪系统可稳定地运行,能够实时地显示被测试者的重心坐标点轨迹,具有良好的平衡测试功能,使用文中包络面积算法运行速度快,算法具有良好的稳定性,可以进行有效的人体重心包络面积计算。

关键词：平衡测试仪系统包络面积算法重心坐标点重心轨迹

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OFF－LINE　TWO－DIMENSIONAL　GAS　CHROMATOGRAPHY－MASS　SPECTROMETRY　FOR　ANALYSIS　OF　ASSENTAL　OIL　OF　MEDICINAL　HERB：USE　OF　ABSORPTION　TRAP　AS　INTERFACE

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Chinese Chemical Letters 1994年第1期5卷 73-76页

作者： XueYi MA Hui Ping PAN and yaozu chen (National Laboratory of Applied Organic Chemistry and Department of Chemistry,Lanzhou University, Lanzhou 730000)

The use of an absorption trap off-line 2-DGC in conjunction with a mass spectrometer greatly improved the separation and identification of minor constituents of a complex mixtures such as a natural essential oil. The ... 详细信息

关键词： GAS CHROMATOGRAPHY DIMENSIONAL TWO MASS LINE ABSORPTION

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青海翠雀化学成份的研究

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有机化学 2003年第6期23卷 563-565页

作者：余明新潘远江陈耀祖浙江大学化学系杭州310027

用柱层析、制备薄层层析等对青海翠雀的化学成份进行了分离 ,并用IR ,EA ,MS ,1HNMR ,13 CNMR及DEPT等光谱确定了化合物的结构 ,共分得 5种二萜生物碱 ,其中一种为新化合物 ,还分得一种非生物碱 β 谷甾醇 .

关键词：二萜生物碱制备青海翠雀化学成份提取分离镇痛剂

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苯丙醇胺对映体的毛细管电泳分离和定量

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分析化学 2000年第2期28卷 197-200页

作者：王伟傅小芸陈耀祖兰州730000 兰州大学应用有机化学国家重点实验室浙江大学分析测试中心!杭州310027

采用环糊精及其衍生物作为手性选择剂对苯丙醇胺对映体进行了分离，研究了环糊精种类和浓度对分离的影响。结果表明，采用2，6-O-二甲基-β-环糊精（DM-β-CD）可以使苯丙醇胺对映体达到基线分离。在选定的条件下，考察了苯丙醇胺的定... 详细信息

采用环糊精及其衍生物作为手性选择剂对苯丙醇胺对映体进行了分离，研究了环糊精种类和浓度对分离的影响。结果表明，采用2，6-O-二甲基-β-环糊精（DM-β-CD）可以使苯丙醇胺对映体达到基线分离。在选定的条件下，考察了苯丙醇胺的定量线性范围、检测限和重现性，测得苯丙醇胺的线性范围为20～200mg/L，检测限为1mg／L，迁移时间重现性的RSD为1．0％，峰面积重视性的RSD小于3.5％，并对康泰克实样进行了分析。

关键词：毛细管电泳手性分离苯丙醇胺

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中药复方化学研究策略诹议

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化学进展 1999年第2期11卷 188-192页

作者：陈耀祖浙江大学化学系

为了发展祖国文化瑰宝——中医药学，为人类保健事业做出贡献，亟待开展中药现代化基础研究，其内容大致包括下列５个方面。（１）中药药理基础研究建立符合中医治法治则，脏腑理论的药理模型，开发可量化的简捷、微量的细胞、亚细胞和... 详细信息

为了发展祖国文化瑰宝——中医药学，为人类保健事业做出贡献，亟待开展中药现代化基础研究，其内容大致包括下列５个方面。（１）中药药理基础研究建立符合中医治法治则，脏腑理论的药理模型，开发可量化的简捷、微量的细胞、亚细胞和分子水平的中药药理实验新技术。（２...

关键词：中药复方复方化学研究策略

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