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30 June 2009, Volume 21 Issue 2 Previous Issue    Next Issue

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INFLUENCE OF ENVIRONMENTAL FACTORS ON THE GROWTH AND DEGRADATION EFFICIENCY OF COLD-ADAPTED PETROLEUM HYDROCARBON-DEGRADING SHEWANELL SP. BACTERIA ISOLATED FROM ANTARCTIC SEA LIU Fang-Meng, Jiu-Jin-Lai, Cang-Jia-Ye, Dong-Chun-Xia, Wang-Si-Bin 2009, 21 (2):  81-90.  Abstract ( 2443 )   PDF (509KB) ( 1762 )   Antarctic petroleum hydrocarbon-degrading bacteria NJ49 was screened from microorganism culture collections of Antarctic sea and sea-ice,using diesel as sole carbon source. A preliminary study of influence of environmental factors on the growth and degradation efficiency of NJ49 has been made. In the laboratory,through setting several kinds of cultivation conditions,influence of initial pH,temperature,salty,nutrition and biosurfactant on the growth and degradation efficiency of Shewanell sp. NJ49 were asses... Related Articles | Metrics

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PRELIMINARY RESULTS ON RELATIONSHIP BETWEEN THERMAL DIFFUSIVITY AND POROSITY OF SEA ICE IN THE ANTARCTIC DAN Li-Qiong, BAI Jue-La, LI Zhi-Jun, Matti Leppranta 2009, 21 (2):  91-99.  Abstract ( 2519 )   PDF (398KB) ( 1747 )   Used sea-ice temperature,salinity and density data from Chinese Antarctic Expedition and the Cox and Weeks formula to calculate porosity in ice,the vertical profile of porosity in ice is calculated. Then the vertical profile of sea-ice thermal diffusivity is obtained by establishing an optimal control model about distributed parameter system. According to seven assumed relations of sea-ice thermal diffusion and porosity,the best relation between the diffusion and porosity is identified. In order to illumina... Related Articles | Metrics

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PHYLOGENETIC DIVERSITY OF CULTURABLE BACTERIA IN LAKE SEDIMENT OF ARDLEY ISLAND,ANTARCTIC WANG Feng, WANG Feng-Beng 2009, 21 (2):  100-108.  Abstract ( 2187 )   PDF (902KB) ( 1941 )   The phylogenetic diversity of culturable bacteria in lake sediment of the Ardley Island,Antarctic was investigated. A total of 34 strains were isolated and 16S rDNA nearly full-length sequence analysis revealed that strains fall in 4 divisions:gram positive bacteria (Arthrobacter,Rhodococcus,Staphylococcus);gamma-proteobacteria (Pseudomonas,Acinetobacter,Stenotrophomonas);beta-proteobacteria (Janthinobacterium);Cytophaga-Flexibacteria-Bacteroides(Cytophaga,Pedobacter). The majority of the bacterial strains ... Related Articles | Metrics

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ANTARCTIC ICE MASS LOSS FROM GRAVITY SATELLITE YANG Yuan-De, E Dong-Chen, Chao-Ding-Bei 2009, 21 (2):  109-115.  Abstract ( 2136 )   PDF (458KB) ( 1634 )   GRACE,launched in March 2003,measures spatio-temporal variations of the gravity field with an unprecedented resolution and precision. Jason1 measures the combined effect of steric and mass variations,while the former part can be inferred from GRACE and the latter from WOA05. The seasonal steric variations from difference between Jason1 and GRACE are compared with that of WOA05. The results show that CSR RL04,GFZ RL04 ,GRGS GL04 agree well with WOA05. Antarctic mass change rate distributions are estimated fr... Related Articles | Metrics

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PRELIMINARY STUDY ON PARTICULATE ORGANIC CARBON EXPORT FLUXES IN THE BERING SEA MA Hao, HE Jian-Hua, CENG Zhi, YIN Meng-Duan, CHEN Li-Ai, CENG Shi 2009, 21 (2):  116-123.  Abstract ( 2092 )   PDF (264KB) ( 1453 )   During the Second Chinese National Arctic Expedition from July to September of 2003,depth profiles of dissolved and particulate 234Th in upper water columns were collected at two stations in the Bering Sea. Thorium-234 was sampled by using a traditional Fe(OH)3 co-precipitation technique,which is a reliable approach to 234Th measurement. We observed 234Th excess at station BR03 below the euphotic zone,which is possibly due to the intensive reminera-lization of particulate matter. Particulate organic carbon ... Related Articles | Metrics

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A BIBLIOMETRIC STUDY ON POLAR RESEARCH ARTICLES PARTICIPATED BY CHINESE SCHOLARS COVERED IN WOS HUA Wei-Na, ZHANG Ji, LIU Fang, DENG San-Hong 2009, 21 (2):  124-140.  Abstract ( 2392 )   PDF (609KB) ( 2128 )   This paper presented a bibliometric study on almost all the research articles in WoS database on Antarctic and Arctic research participated by Chinese scholars. A series of quantitative analysis has been made from the aspects of publications,periodicals,authors,regions,affiliations,subjects,citations and so on,in order to find out the research productivity,key organizations,core scholars,core journals,main research fields,most influencing research works,developing trends and to reflect the current research ... Related Articles | Metrics

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ORGANIC GEOCHEMISTRY OF PENGUIN ORNITHOGENIC SEDIMENT FROM VESTFOLD HILLS,EAST ANTARCTICA HUANG Jing, WANG Xin-Meng, SUN Li-An 2009, 21 (2):  141-150.  Abstract ( 2379 )   PDF (832KB) ( 1696 )   We studied molecular geochemical compositions of penguin ornithogenic sediment DG2 from Gardner Island,Vestfold Hills,East Antarctica. The results showed that the aliphatic hydrocarbons mainly consisted of short-chain n-alkanes which likely derived from freshwater algae and bacteria. Meanwhile,the even-carbon fatty acids,such as n-C16,n-C18 and n-C24,dominated alkenoic acids and they principally originated from bacteria,freshwater moss or zooplankton. However,unsaturated fatty acids were predominated by C18... Related Articles | Metrics

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THE PRELIMINARY STUDY OF POLLEN OCCURRENCE IN THE MARINE BOUNDARY IN POLAR REGION LI Zheng, XU Sai-Qi, XIE Zhou-Qing 2009, 21 (2):  151-159.  Abstract ( 2138 )   PDF (1141KB) ( 1609 )   During the 22nd Chinese Antarctic Research Expedition,the aerosols in the marine boundary layer along the R/V Xuelong cruise route were collected using high volume samplers. The samples collected in the tropical,temperate and the Antarctic region,respectively,were selected for pollen analysis. The composition and spatial distribution characteristics of pollen were identified. In addition,the origin and transportation of pollen were also discussed based upon the backward trajectory calculated using the HYSPL... Related Articles | Metrics

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THE ANALYSIS OF ANTARCTIC POLITICS DAN Wei-Hua 2009, 21 (2):  160-166.  Abstract ( 2245 )   PDF (265KB) ( 2057 )   With the deepening of countries Antarctic expeditions and researches,Antarctic politics has become an emerging field of the international politics. In this paper,the main content of Antarctic politics will be explained by the study of the issues of territorial disputes,environmental protection,mineral resources and scientific research. The paper analyzes the role of Antarctic political and legal framework in addressing these issues. At the same time,this paper also discusses the interaction with the Antarc... Related Articles | Metrics