关于通报表扬在全国县（市）、乡（镇）、村级干部国土资源法律知识宣传教育培训活动中成绩突出单位和个人的通知     

国土资源部全国县 《国土资源通讯》2009,(3):12-19

国土资发〔2009〕13号各省、自治区、直辖市党委组织部、宣传部,国土资源厅（局）、教育厅（教委）、司法厅（局）、广播电影电视局,各派驻地方的国家土地督察局,中国地质调查局及国土资源部其他直属单位。国土资源部机关各司局： 为贯彻落实党的十七大精神，深入学习实践科学发展观，坚持节约和合理利用资源的基本国策，推进国土资源法律法规知识的普及，使坚守18亿亩耕地红线和合理开发利用矿产资源成为广大基层干部群众的自觉行动，  相似文献   

Current and Thermohaline Characteristics of the Arabian Sea During January 1998     

CHEN Meixiang)  ZUO Juncheng)  LI Peiliang)  DU Ling)  and LI Lei)) Oceanography Department  Ocean University of China  Qingdao  P. R. China ) Key Laboratory of Coastal Disaster  Defence  Ministry of Education  Hohai University  Nanjing  P. R. China 《中国海洋大学学报(英文版)》2007,6(2):117-124

Based on a ship survey during January 1998, the characteristics of the flow, the thermohaline properties and the volume transport of the Arabian Sea are discussed. A strong westward flow exists between 10.5?N and 11?N, part of which turns to the south as the Somali current near the coast at about 10?N and the rest turns north. At the passage between the African continent and the So- cotra Island, the northern branch separates into two flows: the left one enters the passage and the right one flows eastward along the southern slope of the island. Off the island the flow separates once more, most of it meandering northeast and a small fraction flow- ing southeast. Volume transport calculation suggests that the tidal transport is one or two orders of magnitude smaller than the total transport in this region and it becomes more important near the coast. The average velocity of the flow in the upper layer (0-150 m) is about 20 cm s-1, with a maximum of 53 cm s-1 appearing east of the Socotra Island, and the subsurface layer (200-800 m) has an aver- age velocity of 8.6 cm s-1; the velocity becomes smaller at greater depths. The depth of the seasonal thermocline is about 100 m, above which there is a layer with well mixed temperature and dissolved oxygen. High-salinity and oxygen-rich water appears near the surface of the northern Arabian Sea; a salinity maximum and oxygen minimum at 100 m depth along 8?N testifies the subduction of surface water from the northern Arabian Sea. Waters from the Red Sea and the Persian Gulf also influence the salinity of the area.  相似文献   

THE DIFFERENCE OF ECONOMIC FUNCTION AND THE TRENDS OF INDUSTRIAL DEVELOPMENT IN CENTRAL CITIES ALONG THE XIJIANG RIVER     

LIAO Chi-mei  LI Lan  ZENG Ling-yun 《中国地理科学(英文版)》2000,10(4):335-342

TheXijiangRiveristhemainwaterwayacrosseastandwestinSouthernChina.ItsmaincoursebacksontothewestofGuangdongandthesouthwestofChina,withitsexitthroughHongKong,MacaoandSoutheasternAsia.Ithasawidehinterlandandconvenientwatertransportation.AlongtheXijiangRiver,thecentralcitiesarethecities,whichspreadalongtheXijiangRiver'smaincourse,theZhujiangRiver'sdeltaandoutlet,andBosehasbeenselectedasarepresentativecityintheupperreachesoftheXijiangRiver.Theytotal12cities,includingGuangzhou,Shenzhen,Zhuh…  相似文献   

ESTIMATE OF METHANE EMISSIONS FROM RICE FIELDS IN CHINA BY CLIMATE-BASED NET PRIMARY PRODUCTIVITY     

KANG Guo-ding    CAI Zu-cong  ZHANG Zi-heng    XIAO Peng-feng 《中国地理科学(英文版)》2004,14(4):326-331

1INTRODUCTIONIrrigated ricefieldsarecharacterizedbylargespatialandtemporalvariationsin CH4 emissiontotheatmo-sphere.Accordingly,thereisagreatuncertaintyintheestimate ofCH4 emissionsfromricefields.GreateffortshavebeenmadetoestimatetheCH4 emissionsfromricefieldsandseveralapproacheshavebeendeveloped.TherepresentativemethodsincludetheIPCC(Inter-governmentPanelofClimateChange)region-specificemissionfactormethodandthemodelcalculationmethod.Toimprovethecalculationaccuracy,theIPCCmethodreq…  相似文献   

Expression of the Phycoerythrin Gene of Gracilaria lemaneiformis (Rhodophyta) in E. coli and Evaluation of the Bioactivity of Recombinant PE   总被引：1，自引：0，他引：1  

WEN Ruobing)  SUI Zhenghong)  *  ZHANG Xuecheng)  ZHANG Shuang)  and QIN Song) ) Laboratory of Marine Genetics  Breeding  College of Marine Life Sciences  Ocean University of China  Qingdao  P. R. China ) Institute of Oceanology  Chinese Academy of Sciences  Qingdao  P.R. China 《中国海洋大学学报(英文版)》2007,6(4):373-377

Phycoerythrin (PE) is one of the most important proteins involved in light capturing during photosynthesis in red algae. Its potential biological activities had gained wide concerns. In the present study, tumor cytotoxic and hydroxyl radical assay were preformed to detect the bioactivity of recombinant PE. Recombinant plasmids pGEX-PE and pBGL were transformed into E.coli BL21 to make two recombinant strains BEX (pGEX-PE) and BGL (pBGL). PE expressing in BEX (pGEX-PE) was validated by SDS-PAGE and Western blotting analysis. SDS-PAGE analysis indicated that the PE-GST fusion protein was mostly inclusion bod- ies. Specific expression of PE was confirmed by Western blotting analysis. The recombinant E. coli BEX (pGEX-PE) cells were col- lected and sonicated. The supernatants were reserved for the tumor cytotoxic experiments. The result of tumor cytotoxic assay indi- cated that the supernatants containing PE had the activity of inhibiting the growth of Hela cells and with the increase of protein con- centration, the inhibiting rate increased from 37.31% to 63.26%, which showed significant difference from the control. Hydroxyl radical scavenging effect was tested with supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates treated with sonication and heating. For the sonication samples, the scavenging rates of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were significantly higher than the negative control BL21(pGEX-4T) (P<0.02), and the scavenging rates increased slowly following the increase of the protein content. For the heating samples, except for the 0.2 mg mL-1 BGL (pBGL) products, the scavenging effects of the supernatants of BEX (pGEX-PE) and BGL (pBGL) cell lysates were stronger than that of negative control BL21(pGEX-4T). However, the effect intensity was not positively correlated with the increase of the protein concentration. Though a partially de- creased hydroxyl radical scavenging activity was led by heating, the biological activity was still retained and conspicuous. This re- search showed that phycoerythrin protein expressing in E. coli has the potential medical and sanitarian value.  相似文献   

Impact of Human Activities on Depositional Process of Tidal Flat in Quanzhou Bay of China   总被引：2，自引：0，他引：2  

WANG Aijun 《中国地理科学(英文版)》2007,17(3):265-269

As a very important component of a coastal system,tidal flats come to be a focus of the studies on land-ocean interaction in the coastal zone because those areas are subjected to intense human activities and are highly sensitive to the global change.The Quanzhou Bay,located along the middle part of Fujian coast of China,covers about 136.4km2,and the area of coastal wetland in the entire bay from intertidal to subtidal with 6m of water depth accounts for 96% of the total area.Seven short cores were collected and divided in situ with the interval of 5cm on the coastal wetlands of Quanzhou Bay on April 19,2006.The sediment samples were scattered and the grain sizes were measured by using Mastersizer 2000.Human beings' activities on tidal flat have disturbed the vertical distribution of sediments in stratigraphic sequence and accelerated the sedimentation rates.Grain size analysis results show that the grain size diameters increase and sediment becomes worse sorted towards the sea under the strong human disturbance;Spartina alterniflora can play a role of trapping the fine sediment;but near the bank,the sediment becomes coarse and there are two peak values on frequency curve influenced by the sandpile.The trough formed by human activities along the coastline changes the transport path of water and suspended sediment.The sediments are transported through the trough and deposit in it during the flood;the ebb flow is retarded by the flow output through the adjacent trough,and the deposited sediment can not be re-suspended;then,the sedimentation rate increases.In situ observation show that the sedimentation rate is about 8-10cm/yr.  相似文献   

Nodes and Field of Tourist Origins to Ancient Village——A Case Study of Huangcheng Village in Shanxi Province of China     

ZHONG Jing  ZHANG Jie  LI Donghe    ZHAO Yong  LU Song    SHI Chunyun 《中国地理科学(英文版)》2007,17(3):280-287

Based on Hagget's theory of spatial structure,researches on the nodes and field of tourist origins to Huang-cheng Village in Shanxi Province of China have been explored.Nodal hierarchy structure of tourist origins is analyzed with cluster analysis and the gravity model.And field of tourist origins is analyzed with attraction radius index(R)and geography concentration index(G).In the field analysis,R and G of Huangcheng Village are compared with Xidi Village that is a world heritage located in Huangshan City of Anhui Province in China.According to comparison of loca-tions of two areas,influential factors for field area of Huangcheng Village are identified.It is concluded that:1)cluster analysis and gravity model can be complementary methods to each other for nodal hierarchy structure analysis of tour-ist origins;and 2)as far as location is concerned,the weak intensity effect of tourism resources in the tourist region is a major cause for explaining why tourist origins to Huangcheng Village are mainly its neighboring areas.Moreover,it is suggested that the regional effect of tourist resources should be regarded as a component of destination attractiveness when applying gravity model.  相似文献   

漫游维甘,品读"菲常"韵味     

黄橙 《地图》2021,(1):78-91

维甘古城早在1999年就拥有了“世界文化遗产”的响亮名号,然而知者寥寥,菲律宾政府似乎也不以为意,一直在力推海岛度假与潜水探秘,维甘古城被冷落了许久!这座“亚洲保存得最为完好的西班牙殖民城市,海上丝绸之路的重要驿站”,几百年来就这样自守一隅,过着阳光明媚、岁月静好的恬淡日子。  相似文献   

苏甲荣与日新舆地学社     

李鹏  本刊编辑部 《地图》2021,(1):100-107

日新舆地学社的创设1922年,日新與地学社在北京创办,创始人是北京大学的一位毕业生一苏甲荣。苏甲荣(1895-1945年),字演存,广西藤县人,素喜舆地之学。1914年秋考入北京大学预.科,开始致力于史地研究。1916年撰写《中国境界变迁大势考》一书,.上起清初,迄于民国,以中国与列强的边界谈判为主线,完整勾勒出近代以来中国疆域的变迁过程。  相似文献   

京城旧梦:古地图中的北京印象     

吴寒 《地图》2021,(1):108-121

“帝京高拥九重尊,直北山河紫翠痕”。北京是一座既古老又现代的城市,它承载了厚重的历史记忆,凝聚了浓郁的人文气息。北京城是一个说不尽的话题,这里分布着宫苑园林、坛庙建筑、商业集市、街道坊巷、城市水系等等,既包罗大气雍容的都城气象,也不乏繁华热闹的市井趣味:南起永定门,北至钟楼的城市中轴线,延伸出北京独有的秩序之美;宫城、皇城、内城、外城层层嵌套的城市空间格局,定格了历朝古都的庄严气魄。  相似文献