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Impacts of Typhoons Tianying and Dawei on seagrass distribution in Xincun Bay,Hainan Province,china

Acta Oceanologica Sinica 2011年第1期30卷 32-39页

作者： YANG Dingtian HUANG Daojian CAS key Laboratory of Tropical Marine Environmental Dynamics South China Sea Instituteof Oceanology Chinese Academy of Sciences Guangzhou 510301 China South china institute of Environmental Sciences Ministry of Environmental Protection of thePeople＇s Republic of China Guangzhou 510655 China

More than 50% of the typhoons landing in china have landed on the southeast coast, where they have caused great pressure on the coastal environment. Seagrass, one of the most important con- stituents of coastal ecosystems, is also greatly affected by typhoons. In order to clarify how seagrass distribution variation is affected by typhoons in coastal areas in southeast china, data of Typhoons Dawei and Tianying （category 4 and category 2 respectively, which just ran through the southern part of Hainan province） have been studied. In situ observation and satellite remote sensing data （CBERS-china Brazil Earth Resources Satellite） in 2004 and 2006 were used to retrieve seagrass distribution in Xincun Bay, Hainan province. In situ observations showed that leaf length, stem biomass and above ground biomass on average showed evidence of reduction after Typhoons Tiany- ing and Dawei. However, seagrass density showed no evidence of reduction after typhoon Tianying and Dawei passed by and increased rapidly in January 2006. From results of satellite remote sensing data, seagrass distribution can be detected with high accuracy, and the area of seagrass distribution on the south coast of Xincun Bay in 2006 after the typhoon passed by was smaller than that in 2004 in region A and B. However, in region C, area of seagrass coverage under 20% increased. These results demonstrated that typhoons Tianying and Dawei damaged seagrass bed and helped seagrass to get rid of aged and dead leaves, and this correspondingly facilitated seagrass growth.

关键词： seagrass Typhoon Tianying and Dawei Xincun Bay

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Ambient formaldehyde concentrations in summer in 30 Chinese cities and impacts on air cleaning of built environment

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Energy and Built Environment 2024年第4期5卷 493-499页

作者： Shuolin Qiu Zirui He guangdong Liu Zhen Ding Zhongming Bu Jianping Cao Wenjing Ji Wei Liu Chunxiao Su Xinke Wang Fan Liu Ting Li Hua Qian Cong Liu School of Energy and Environment Southeast UniversityNanjingJiangsu210096China china Green Development Investment Group Co.LTD Beijing100000China Department of Environmental Health Jiangsu Provincial Center for Disease Control and PreventionNanjingJiangsu210009China Department of Energy and Environmental System Engineering Zhejiang University of Science and TechnologyHangzhouZhejiang310023China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhouGuangdong510006China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China institute for Health and Environment Chongqing University of Science and TechnologyChongqing401331China School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai200093China School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an710049ShaanxiChina Tsinghua University Beijing100084China

Formaldehyde is an important carcinogen commonly found *** indoor sources have been intensively *** study on outdoor formaldehyde concentration,which is potentially an important source to indoors,remains *** study attempts to characterize temporal and spatial distribution of the atmospheric formalde-hyde concentration in Chinese *** variation of ambient formaldehyde was examined in 6 cities and peak hours were identified between 12:00 pm and 3:00 ***,outdoor formaldehyde concentrations were measured in the peak hours in 30 cities during the summer months of Jul.-Aug.,*** formaldehyde concentrations in the peak hours fell into a range of 0.005-0.087 mg/m^(3)(median value is 0.027 mg/m^(3)),87.7%of which have exceeded the chronic reference exposure criteria of 0.009 mg/m^(3) set by Office of Environmental Health Hazard *** risk analysis suggests that exposure to ambient formaldehyde could cause a median carcinogenic risk of 1.9×10^(−5)(3.17×10^(−6)-6.13×10^(−5)),higher than threshold limit of 10−*** correlation analysis of the 30 cities shows that ambient summertime atmospheric formaldehyde concentrations of the city are positively correlated with its Gross Domestic Product(r=0.48).We also found that the outdoor formaldehyde concentrations in urban areas(median:0.017 mg/m^(3))is slightly higher than those in suburban areas(median:0.013 mg/m^(3)).Results here prove that outdoor formaldehyde is ubiquitous in Chinese cities and reduces effectiveness of ventilation in dilution indoor *** it would underestimate air cleaner capacity needed by a factor of about *** should be accounted for in health analysis and air quality engineering control design of built environment in the future.

关键词： Atmospheric formaldehyde Temporal distribution Health risk Ventilation efficiency

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泮塘五约微改造,广州,广东,中国

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世界建筑 2024年第8期 58-63页

作者： Urban Elephant Architectural Design & Planning (guangzhou) Co.,Ltd. guangzhou Urban Renewal Planning & Design institute Co.,Ltd. 象城建筑规划设计(广州)有限公司广州市城市更新规划设计研究院

广州荔湾泮塘五约更新计划始于2011年底,至今仍在持续。本项目展示了2016-2024年间针对建筑和环境空间的历次设计、改造,反映了广州历史街区改造中出现的城市遗产整体观念,以及更新设计方法、修缮技术的不断尝试和逐渐进步。泮塘五约更... 详细信息

广州荔湾泮塘五约更新计划始于2011年底,至今仍在持续。本项目展示了2016-2024年间针对建筑和环境空间的历次设计、改造,反映了广州历史街区改造中出现的城市遗产整体观念,以及更新设计方法、修缮技术的不断尝试和逐渐进步。泮塘五约更新计划是在城市历史景观视角下,通过对建成遗产与环境、历史与当代生活记忆的阅读、理解,建立景观、遗产与传统文化的整体关联,并通过公众参与式的设计与共同缔造,实现多主体共同愿景下的保护、活化与发展。

关键词：项目展示城市历史景观整体观念广州荔湾更新设计公众参与泮塘共同愿景

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A Slip-Line Method for Calculating Extrusion Force of Steel Helmet with Cold Extrusion Moulding

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Journal of Systems Engineering and Electronics 1999年第2期10卷 75-81页

作者： Guo Jinji Zhao Sheng Xing Haoxu(Department of Applied Mechanics and Engineering, Zhongshan University,guangzhou 510275, P. R. china)Guan Guifen Liu Zhijian(The Iron Steel Research institute of guangdong,guangzhou 510275, P. R. china) Department of Applied Mechanics and Engineering Zhongshan University guangzhou 510275 P. R. china The Iron Steel Research institute of guangdong Guangzhou 510275 P. R. China

This paper presents the elastic and plastic deformation of the steel helmet with coldextrusion moulding. The plastic streamline of the plastic mould-making process for ellipse thinplate is described. The distribution of slip-line is established based on the plastic streamline. Theextrusion force of plastic moulding of the steel helmet is calculated by using of slip-line ***, an applied example is given.

关键词： Steel helmet Cold extrusion Plastic streamline slip-line method Extrusion force.

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INFLUENCE OF CHEMICAL ADDITIVES ON GAS HYDRATE FORMATION

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化工学报 2003年第Z1期54卷 37-40页

作者： TANG Cuiping and FAN Shuanshi (Center for Gas Hydrate Research, guangzhou institute of Energy Conversion, Chinese Academy of Science, guangzhou 510070, guangdong, china) Center for Gas Hydrate Research Guangzhou Institute of Energy Conversion Chinese Academy of Science Guangzhou 510070 Guangdong China

One surfactant as sodium dodecyl sulfate (SDS) and one synthesized sample as gas hydrate inhibitor are introduced in this paper. Through experiments we prove sodium dodecyl sulfate can accelerate the formation rate of... 详细信息

关键词： natural gas hydrate, chemical additive, kinetic inhibitor

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RESEARCH ON THE POPULATION CARRYING CAPACITY OF THE LAND RESOURCES IN THE ECONOMIC AREA OF ZHUJIANG DELTA

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Chinese Geographical Science 2001年第2期11卷 174-180页

作者： TANG Hui-jun1, JIANG Jian-quan2 (1.institute of Economy Management, guangdong University of Technology, guangzhou 510090, P.R.china 2.Shenzhen Longgang Urban Planning ＆Architecture institute, Shenzhen, 518172, P.R.china) institute of Economy Management Guangdong University of Technology Guangzhou P. R. China Shenzhen Longgang Urban Planning & Architecture institute Shenzhen P. R. China

The authors once made a preliminary research on population carrying capacity of the land in the Economic Area of Zhujiang Delta (EAZD for short) in 1995, and reckoned that the ultimate population in this region will be 23 550 thousand by year of 2000. While the population in being in EAZD was 22.62 million in *** accords with the prefigured result in the rough from the point of view of development. According to the data of plow land resources from the 2000 Statistical Yearbook of EAZD and the study on the population-foodstuff-plow land relationship, this paper calculates the productive potential of plow land and the population carrying capacity of land by year of 2010, and puts forward the countermeasures for improving the population carrying capacity of land in this region.

关键词： land resources land production potential population carrying capacity of land the Economic Area of Zhujiang Delta

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Ecology of the rehabilitation of vegetation on tropical coastal eroded land in guangdong， china

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Journal of Environmental Sciences 1995年第1期7卷 74-84页

作者： Yu Zuoyue Wang Zhuhao South china institute of Botany, Chinese Academy of Sciences,guangzhou 510650,china South china Inst of Botany Chinese Academy of Science Guangzhou China

ＥｃｏｌｏｇｙｏｆｔｈｅｒｅｈａｂｉｌｉｔａｔｉｏｎｏｆｖｅｇｅｔａｔｉｏｎｏｎｔｒｏｐｉｃａｌｃｏａｓｔａｌｅｒｏｄｅｄｌａｎｄｉｎＧｕａｎｇｄｏｎｇ，ＣｈｉｎａＹｕＺｕｏｙｕｅ；ＷａｎｇＺｈｕｈａｏＳｏｕｔｈＣｈ... 详细信息

ＥｃｏｌｏｇｙｏｆｔｈｅｒｅｈａｂｉｌｉｔａｔｉｏｎｏｆｖｅｇｅｔａｔｉｏｎｏｎｔｒｏｐｉｃａｌｃｏａｓｔａｌｅｒｏｄｅｄｌａｎｄｉｎＧｕａｎｇｄｏｎｇ，ＣｈｉｎａＹｕＺｕｏｙｕｅ；ＷａｎｇＺｈｕｈａｏＳｏｕｔｈＣｈｉｎａＩｎｓｔｉｔｕｔｅｏｆＢｏｔ...

关键词： tropics ereded land ecology of vegetation recovery.

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Two-dimensional Riemann problems of simplified Euler equation

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Chinese Science Bulletin 1998年第6期43卷 441-444页

作者： YANG Xiaozhou 1,2 and HUANG Feimin+1 1. institute of Applied Mathematics, Chinese Academy of Sciences, Beijing 100080, china 2. Department of Mathematics, Shantou University, guangdong 515063, china institute of Applied Mathematics Chinese Academy of Sciences Beijing China Department of Mathematics Shantou University Guangdong China

The two-dimensional Riemann problem of simplifed Euler equation is discussed, in which initial value contains two different constant states that are separated by a smooth curve. This problem is a natural description of realistic phenomena, but it is hard to study by conventional idea. So a new approach is proposed. Some new properties about two-dimensional rarefaction wave, shock wave and intermediate state of solutions are disclosed.

关键词： D Riemann problem implicit functions cylindrical surface pencil of cylindrical surface.

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Differential expression analysis of Liprin-α2 in hibernating bat (Rhinolophus ferrumequinum)

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Progress in Natural Science:Materials International 2008年第1期18卷 27-32页

作者： Lihong Yuan a,b,c, Xueguo Zuo a, Jinping Chen d, Benfu Lin e, Junpeng Zhang b, Min Sun e, Shuyi Zhang a,* a School of Life Science, East china Normal University, Shanghai 200062, china b institute of Zoology, Chinese Academy of Sciences, Beijing 100080, china c Graduate University of Chinese Academy of Sciences, Beijing 100080, china d guangdong Entomological institute, guangzhou 510260, china e guangzhou institute of Biomedicine and Health, Chinese Academy of Sciences, guangzhou 510663, china School of Life Science East China Normal University Shanghai 200062 China institute of Zoology Chinese Academy of Sciences Beijing 100080 China Graduate University of Chinese Academy of Sciences Beijing 100080 China guangdong Entomological institute Guangzhou 510260 China guangzhou institute of Biomedicine and Health Chinese Academy of Sciences Guangzhou 510663 China

A PCR-based subtractive hybridization technique was used to identify genes up-regulated in the hibernating bat brain to explore the molecular mechanism of hibernation. Three genes, Liprin-a2, PTP4A2 and CAMKKb were difierentially expressed in hibernating bat brain tissue compared to active bat brain tissue. One of them, Liprin-a2, which has recently been shown to have the key function in the organization of presynaptic and postsynaptic multiprotein complexes was studied in detail. We demonstrated that the expression level of Liprin-a2 was up-regulated almost 4-fold in hibernating bat brains by RT-PCR compared to levels in active bats. The difierential expression pattern of Liprin-a2 was also detected in muscle, fat, brain and heart tissue of hibernating bats by real-time quantitative PCR. The result indicated that Liprin-a2 was over-expressed in brain and heart tissue and down-regulated in muscle and fat. In brain tissue of hibernating bats, Liprin-a2 expression was statistically significantly higher than in brain tissue of active controls (P = 0.029). The precise control of transcriptional level and the distinctively difierential expression pattern of Liprin-a2 in difierent organs during circ- annual hibernation may have important physiological significance, not only in maintaining normal function of many key organs but also in effectively conserving limited energy resources without physiological damage.

关键词： Bat Differential expression Hibernation Liprin-a2

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Highly efficient transformation of intact yeast-like conidium cells of Tremella fuciformis by electroporation

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Science china(Life Sciences) 2008年第10期51卷 932-940页

作者： GUO LiQiong1,2, LIU Yong1, ZHAO ShuXian1, LIU ErXian1 & LIN JunFang1,2 1 College of Food Sciences, South china Agricultural University, guangzhou 510640, china 2 institute of Biomass Research, South china Agricultural University, guangzhou 510640, china 1. College of Food Sciences South China Agricultural University Guangzhou 510640 China 2. institute of Biomass Research South China Agricultural University Guangzhou 510640 China

Tremella fuciformis is one of higher basidiomycetes. Its basidiospore can reproduce yeast-like conidia, also called the blastospore by budding. The yeast-like conidia of T. fuciformis is monokaryotic and easy to culture by submerged fermentation similar to yeast. So it is a good recipient cell for exogenous gene expression. In this study, two expression vectors pGlg-gfp containing gpd-Gl promoter and gfp gene and pGlg-hph containing gpd-Gl promoter and hph gene were constructed. The lowest sensitive concentration of hygromycin for the blastospore was determined on three types of media. Our ex- periments showed that the lowest sensitive concentration of hygromycin for the blastospore was 5 μg/mL on MA medium. The intact blastospores were transformed with the expression vector pGlg-hph by electroporation. The putative transformants were obtained by the MA selective medium. Experi- mental results showed that the most effective parameters for the electroporation of intact blastospores were obtained by using STM buffer, 1.0×108 cells/mL of blastospores, 200 μL in transformation volume, 6 μg plasmid, 2.0 kV/cm of electric pulse voltage, stillness culturing on MB liquid medium for 48 h after electroporation. In these transformation conditions, the efficiency reached 277 colonies/μg DNA. Co-transformation of plasmid pGlg-gfp and pGlg-hph with ratio of 1:1 was performed by electroporation with the optimal parameters. The putative co-transformants were obtained by the MA selective medium. Eight randomly selected colonies from the vast putative co-transformants were analyzed by PCR de- tection and Southern blotting. The experiments showed that the gfp was integrated into the genomes of three transformants. The co-transformation efficiency was 37.5%. Green fluorescence was observed under laser scanning confocal microscope in these gfp positive transformants. This indicates that the exogenous gfp can be expressed effectively in the yeast-like conidia of T. fuciformis.

关键词： Tremella fuciformis electroporation yeast-like conidia intact cells gene expression hph gene gfp gene

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