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Open Journal of Marine Science 2014年第2期4卷 61-67页

作者： Rong Yi Yehui Tan shengfu Wang pingping shen Zhixin Ke Liangmin Huang Xingyu Song Gang Li Key Laboratory of Tropical Marine Bio-Resources and Ecology South China Sea Institute of Oceanology CAS Guangzhou China Key Laboratory of Tropical Marine Bio-Resources and Ecology South China Sea Institute of Oceanology CAS Guangzhou China University of the Chinese Academy of Sciences Beijing China

Bioavailability of nitrogen (N) and phosphorus (P) is known to affect marine phytoplankton physiology, thus influencing their primary productivity;and it’s of general interest to see how the N or/and P additions affect the differently cell-sized phytoplankton assemblages. Data from the northern South China Sea showed that P addition increased up to 6 times of total chl a content within 24 h in the estuarine water;and N+P addition increased more than 20 times of chl a within 144 h in the pelagic water. The P addition powered 18.0% and 149% increase in the carbon fixation of larger (>3 μm) and smaller (

关键词： Nutrient Addition Carbon Fixation Cell Size Phytoplankton Assemblages South China Sea

Atmospheric iron deposition in a megacity of northwest China:Solubility,speciation,and deposition fluxes

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Particuology 2024年第7期90卷 383-393页

作者： Xiaotao Yang pingping Liu Zhiwei Xue Hao Zhang Xuan Li Hongmei Xu Zhenxing shen Department of Environmental Science and Engineering Xi'an Jiaotong UniversityXi'anChina State Key Laboratory of Loess and Quaternary National Key R&D of China Geology Institute of Earth EnvironmentChinese Academy of SciencesXi'anChina No.203 Research Institute of Nuclear Industry Xi'an710086China Xi'an Environmental Monitoring Station Xi'an 710054China

Atmospheric iron has crucial effects on biogeochemical cycles,atmospheric processing,global climate,and human health.In this study,atmospheric dustfall samples were collected from six functional areas in Xi'an,China,from 2020 to 2021.The spatiotemporal distributions and deposition fluxes of total and water-soluble(ws)Fe as well as the speciation and potential sources of ws-Fe were characterized.Industrial areas had the highest concentrations of total Fe and ws-Fe,which were mainly due to copious emissions of heavy metals during manufacturing.The total Fe concentrations peaked in spring,primarily due to the substantial input of crustal dust,which also led to the lowest Fe solubility in this season.By contrast,the highest levels of ws-Fe occurred during winter due to an increase in biomass combustion.Among the water-soluble forms,ws-Fe(II)was dominant and accounted for 74.8%of the total amount of ws-Fe.Crustal dust was the main contributor to total Fe,whereas biomass burning primarily contributed to peak ws-Fe concentrations.The average total and ws-Fe deposition fluxes in Xi'an were the highest in spring and lowest in autumn,which were related to the distributions of the dustfall deposition fluxes and their Fe contents during these periods.Our study provided a broader and comprehensive understanding of atmospheric iron deposition in Chinese urban area,which is of positive significance for understanding atmospheric chemistry and global climate change.

关键词： Atmospheric dustfall Iron Speciation distribution Seasonal variation Functional area Sources

Cell-death-mode switch from necrosis to apoptosis in hydrogen peroxide treated macrophages

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Science China(Life Sciences) 2010年第10期53卷 1196-1203页

作者： LIN XuZhu SUN TingZhe CAI MeiHong shen pingping State Key Laboratory of Pharmaceutical Biotechnology Department of BiochemistrySchool of Life ScienceNanjing UniversityNanjing 210093China

Cell death is typically defined either as apoptosis or necrosis. Because the consequences of apoptosis and necrosis are quite different for an entire organism, the investigation of the cell-death-mode switch has considerable clinical significance. The existence of a necrosis-to-apoptosis switch induced by hydrogen peroxide in macrophage cell line RAW 264.7 cells was confirmed by using flow cytometry and fluorescence microscopy. With the help of computational simulations, this study predicted that negative feedbacks between NF-κB and MAPKs are implicated in converting necrosis into apoptosis in macrophages exposed to hydrogen peroxide, which has significant implications.

关键词： macrophage hydrogen peroxide apoptosis necrosis cell-death-mode switch

Experimental investigations on the fluid flow mechanism in porous media of enhanced oil recovery by alkli/surfactant/polymer flooding

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Science China(Technological Sciences) 2005年第4期48卷 454-467页

作者： WANG Jialu shen pingping CHEN Yongzhong ZHANG Zubo JIA Xu TIAN Yuling Research Institute of Petroleum Exploration and Development Beijing 100083 China Research Institute of Petroleum Exploration and Development Beijing 100083 China Research Institute of Petroleum Exploration and Development Beijing 100083 China Research Institute of Petroleum Exploration and Development Beijing 100083 China Research Institute of Petroleum Exploration and Development Beijing 100083 China Research Institute of Petroleum Exploration and Development Beijing 100083 China

The fluid flow mechanism in porous media of enhanced oil recovery by Alkli/ Surfactant/ Polymer (ASP) flooding is investigated by measuring production performance, pressure distribution and saturation distribution through installing differential pressure transducers and saturation measuring probes in a physical model of vertical heterogeneous reservoir. The fluid flow variation in porous media is the main reason of enhanced oil recovery of ASP flooding. The pressure field and saturation field are nonlinearly coupled together and the interaction between them results in the fluid flow variation in the reservoir. In a vertical heterogeneous reservoir, the ASP agents initially flow in the high permeability layer, and fluid changes the flow direction toward the low and the middle permeability layers because the resistance in the high permeability layer is increased under the physical and chemical action of adsorption, retention and emulsion. ASP flooding displaces out not only the residual oil in the high permeability layer, but also the remaining oil in the low and the middle permeability layers by increasing swept volume and displacing efficiency.

关键词： ASP flooding, vertical heterogeneous reservoir, enhanced oil recovery, fluid flow mechanism in porous media.

Composition and Distribution of Planktonic Ciliates in the Southern South China Sea During Late Summer： Comparison Between Surface and 75 m Deep Layer

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Journal of Ocean University of China 2016年第1期15卷 171-176页

作者： LIU Huaxue shen pingping LI Chunhou CHEN Zuozhi QI Zhanhui HUANG Honghui Guangdong Provincial Key Laboratory of Fishery Ecology and Environment Key Laboratory of South China Sea Fishery Resources Development and Utilization of Ministry of Agriculture South China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Guangzhou 510300 P. R. China Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 P. R. China

Ciliates are very important components in most marine ecosystem.They are trophic link between the microbial food web and grazing food chain.In this study,ciliates were collected from 11 sites in the southern South China Sea(SCS) during August 25 to September 28,2011.Their composition and distribution at the surface and 75 m deep depth of the ocean were studied.A total of 30 species belonging to 22 genera were identified,and 22 species of 15 genera were Tintinnids.Eutintinnus fraknoii and E.stramentus were the most common species.The other dominants were strombidiids ciliates including Strombidium conicum and S.globosaneum,which were followed by the tide form,Mesodinium pulex.Ciliates abundance ranged from 46 ind L^(-1) to 368 ind L^(-1) in the open sites,46–368 ind L^(-1) at surface and 73–198 ind L^(-1) at 75 m deep layer.In the Yongshu reef,ciliates abundance ranged from 167 ind L^(-1) to 365 ind L^(-1) in the water column,similar to that in Sanya coral reef waters.Ciliates composition showed obvious difference between surface and 75 m deep layer at station S2(P < 0.05),while no similar result was observed at other sites.At 75 m deep layer,salinity was negatively related to mixed layer depth(P < 0.05),but positively to chlorophyll a concentration(P < 0.05),indicating that the change of vertical mixing in water column influenced vertical distribution of ciliates in the southern SCS.

关键词：浮游纤毛虫组成部分海洋表面南海南部海洋生态系统叶绿素a浓度混合层深度中国南海

Variations in silicate concentration affecting photosynthetic carbon fixation by spring phytoplankton assemblages in surface water of the Strait of Malacca

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Acta Oceanologica Sinica 2013年第4期32卷 77-81页

作者： LI Gang LIN Qiang shen pingping NI Guangyan SONG Xingyu WANG shengfu FAN Yanzhi HUANG Liangmin TAN Yehui Key Laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical Garden Chinese Academy of Sciences Guangzhou 510160 China

The Strait of Malacca （SoM）, the world＇s busiest sea-route, is increasingly polluted as the rapid develop- ment of world trades, affecting phytoplankton primary productivity therein. The variations of surface phy- toplankton biomass, size-structure and carbon fixation were investigated across the SoM during the spring period （May 4 to 9, 2011）. Chlorophyll a concentration increased from 0.12 ptg/L at the northwest entrance of the SoM to a maximal 0.63 #g/L at narrowest section, and decreased to 0.10/.tg/L at the southeast entrance. Photosynthetic carbon fixation by phytoplankton coincided well with Chl a biomass, and increased from 10.8 to 22.3 pg C/（L.d）, then decreased to 9.21/zg C/（L.d）; while the carbon fixation rate showed an inverse pattern to the changes of Chl a, and decreased from 87.1 to 35.5 #g C/（#g Chl a.d） and increased thereafter to 95.3 btg C/（/2g Chl a.d）. Picophytoplankton cells （〈3/2m） contributed to more than 60% and 50% of the total Chl a and carbon fixation at both the entry waters; while the contributions of pico-cells decreased sharply to the minimum of 18.3% and 27.5% at the narrowest part of the SoM. In particular, our results showed that the silicate concentration positively regulated Chl a biomass and carbon fixation, reflecting that the higher silicate favoured the growth of phytoplankton and thus led to higher primary production in this strait.

关键词： photosynthetic carbon fixation phytoplankton the Strait of Malacca

Industrial Flue Gas Utilized to Improve Oilfield Development

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China Oil & Gas 2005年第3期12卷 7-10页

作者： shen pingping Jiang Biwu Research Institute of Petroleum Exploration and Development PetroChina

To decrease CO2 emission: one of China's important strategiesThe negative effect and harm for human being and natural environment caused by greenhouse effect has triggered all governments' great concerns throughout the world, which is generated by greenhouse gas emission into aerosphere. CO2 is the main component of greenhouse gas, accounting for about 65%. In order to constrain the global-warming trend, the Kyoto Protocol set a target for developed countries to reduce CO2 emission, which required the greenhouse gas emission would decline by 5.2% from 2008 to 2012 compared with that in 1990.

关键词：中国石油市场油田天然气市场工业燃料环境保护

Longitudinal patterns of spring-intermonsoon phytoplankton biomass,species compositions and size structure in the Bay of Bengal

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Acta Oceanologica Sinica 2012年第2期31卷 121-128页

作者： LI Gang KE Zhixin LIN Qiang NI Guangyan shen pingping LIU Huaxue YIN Jianqiang LI Kaizhi HUANG Liangmin TAN Yehui Key Laboratory of Marine Bio-resources Sustainable Utilization South China Sea Institute ofOceanologyChinese Academy of SciencesGuangdong 510301China Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South ChinaBotanical GardenChinese Academy of SciencesGuangdong 510650China

Vertical distributions of phytoplankton biomass, compositions and size structure were investigated during the spring-intermonsoon （April 22 to 30） of 2010 along transact 10°N of the Bay of Bengal, northern Indian Ocean. Surface phytoplankton biomass （Chl a） was （0.065±0.009） μg/L, being greater than 80% of which was contributed by pico-phytoplankton （〈3 μm）. The Chl a concen- tration vertically increased to the maximal values at deep chlorophyll maximum （DCM） layer that shoaled eastwards from 75 to 40 m. The Chl a biomass at DCM layer generally varied between 0.2 and 0.4 μg/L, reaching the maximum of 0.56 μg/L with micro-phytoplankton cells （~20 #m） accounting for 58% and nano- （3-20μm） or pico-cells for 15% and 27%, respectively. In particular, the cells concentration coupling well with phosphate level was observed at middle layer （75-100 m） of 87° to 89°E, dominated by micro-cells diatoms （e.g., Chaetoceros atlanticus v. neapolitana, Chaetoceros femur and Pseudonitzsehia sp.） and cyanobacteria （i.e., Trichodesmium hildebrandtii）, With the ceils concentration reached as high as 4.0 × 10^4 and 4.3 × 10^4 cells/L. At the rest of the trans- act however, dinoflagellates （e.g., Amphisdinium carterae and Prorocentrum sp.） were the dominant species, with the cells concentration varying from 0.3×10^3 to 6.8×10^3 cells/L. Our results also indicate that the regulation of large cells （micro-, nano-） on phytoplankton biomass merely occurred at DCM layer of the Bay.

关键词： longitudinal distributions phytoplankton size structure Bay of Bengal

Improved Oil Recovery Technology in China:Status & Outlook

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China Oil & Gas 2005年第4期12卷 6-9页

作者： shen pingping Song Jie Zhu Bin PetroChina Research Institute of Petroleum Exploration and Development

Most of China's onshore oilfields belong to continental deposits, with features of strong heterogeneity, high viscosity, etc., and oil recovery factor averaged only in the scope of 33%-35%. There may be two thirds of ... 详细信息

关键词：中国石油工业石油开采技术石油回收注水技术海上油田

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微灌用泵前微压过滤器的最佳运行工况研究

灌溉排水学报 2022年第6期41卷 72-79页

作者：陶洪飞沈萍萍周洋吴梓境李巧新疆农业大学水利与土木工程学院乌鲁木齐830052 新疆水利工程安全与水灾害防治重点实验室乌鲁木齐830052

【目的】探究微灌用泵前微压过滤器的最佳运行工况。【方法】以泵前微压过滤器为研究对象,以水头损失、截沙质量和总过滤效率作为考核指标,开展了进水流量、含沙量、分水器型式、滤网面积等因素的物理模型正交试验,采用极差和方差分析... 详细信息

【目的】探究微灌用泵前微压过滤器的最佳运行工况。【方法】以泵前微压过滤器为研究对象,以水头损失、截沙质量和总过滤效率作为考核指标,开展了进水流量、含沙量、分水器型式、滤网面积等因素的物理模型正交试验,采用极差和方差分析方法对试验结果进行处理。【结果】影响水头损失大小的因素依次排序为:进水流量、含沙量、滤网面积、分水器型式;对截沙质量影响大小依次排序为:含沙量、滤网面积、分水器型式、进水流量;对总过滤效率影响大小依次排序为:滤网面积、含沙量、分水器型式、进水流量。【结论】影响水头损失、截沙质量及总过滤效率的两个主要因素是含沙量和滤网面积;经综合分析可知最佳运行工况为:进水流量4m^(3)/h,含沙量1.5 g/L,分水器型式3型,滤网面积2060 cm^(2)。

关键词：过滤器微灌系统正交设计极差分析方差分析