壬基酚对罗氏沼虾血清中免疫酶活力的影响

将罗氏沼虾(Macrobrachium rosenbergii)在0.1、0.2、0.4 mg/L的壬基酚中暴露48 h,检测壬基酚对罗氏沼虾血清中部分免疫酶活力的影响。结果表明:高剂量壬基酚组(0.4 mg/L)的罗氏沼虾血清超氧化物歧化酶(SOD)活力在前期受到明显抑制(p<0.05),24 h后各剂量组血清SOD活力转为促进,中、高剂量组的SOD活力显著高于对照组(p<0.05);中、低剂量组血清中酸性磷酸酶(ACP)活力均受到抑制,其中12 h低剂量组血清ACP活力显著降低(p<0.05),高剂量组则表现为先促进后抑制的效应;各剂量组血清碱性磷酸酶(AKP)活力先受到抑制后转为促进,48 h中、低剂量组血清AKP活力显著高于对照组(p<0.05)。     

斜生栅藻对全氟辛酸和Zn2+联合胁迫的生理生化响应

【目的】探究全氟辛酸(PFOA)与重金属锌(Zn²⁺)单一及联合暴露对斜生栅藻(Scenedesmus obliquus)的急性毒性效应和作用机制,为全氟化合物(Perfluorinated compounds,PFCs)和重金属在水生生态系统中的联合风险评估提供理论基础。【方法】将1×10⁶mL^-1斜生栅藻分别在0～16 mg/L Zn²⁺、0～350 mg/L PFOA单一处理组及0～1.5 TU联合处理组暴露96 h,分析暴露条件对斜生栅藻的细胞浓度、藻细胞叶绿素a(Chl a)、总蛋白(TP)含量、抗氧化系统、细胞外部形态、转化氨氮能力、Zn²⁺与PFOA去除率等指标的影响。【结果与结论】处理96 h,Zn²⁺与PFOA单一胁迫抑制斜生栅藻生长的半最大效应质量浓度(96 h-EC₅₀)分别为14.17 mg/L和198.98 mg/L;二者联合胁迫96 h-EC₅₀为0.97 TU,作用模式为部分相加作用...     

Mg2+、Mn2+对波吉卵囊藻生长的影响

【目的】研究Mg²⁺、Mn²⁺对波吉卵囊藻生长和多糖代谢的影响。【方法】取蒸馏水培养数日后的波吉卵囊藻液接入以f/2培养液的配方为基础的新鲜培养液中,Mg²⁺浓度梯度分别设置为0、1、2、4、8 mg/L,Mn²⁺浓度梯度分别设置为0、0.005、0.050、0.500、5.000 mg/L,实验周期为10 d。【结果与结论】不同浓度Mg²⁺、Mn²⁺对波吉卵囊藻的生长有显著性影响,当Mg²⁺质量浓度为2 mg/L时,波吉卵囊藻的相对增长率、色素蛋白含量均出现最大值,显著高于Mg²⁺添加量为0、4和8 mg/L的组(P<0.05),当Mn²⁺质量浓度为0.005 mg/L时,波吉卵囊藻相对增长率、色素蛋白含量均出现最大值,显著高于Mn²⁺添加量0、0.050、0.500和5.000 mg/L组(P<0.05)。不同浓度Mg²⁺、Mn²⁺对波吉卵囊藻胞外多糖含量有显著影响(P<0.05),当Mg²⁺质量浓度>2 mg/L、Mn²⁺质量浓度>0.005 mg/L时,波吉卵囊藻生长均受到胁迫,其胞外多糖合成量明显增加,以保护藻体不受危害;当Mg²⁺质量浓度为8 mg/L、Mn²⁺质量浓度为5.000 mg/L时,波吉卵囊藻胞外多糖含量分别为对照组的2.43和3.36倍。     

湛江港海水中铜、锌、铅、镉的周年变化与水质评价

于2008年3月至2009年1月用电感耦合等离子体质谱法(ICP-MS)对湛江港海水中的铜(Cu)、锌(Zn)、铅(Pb)、镉(Cd)进行调查。分析结果表明:2008年湛江港湾海水中Cu、Zn、Pb、Cd含量较低,年平均含量分别为4.46×10-3mg/L、14.2×10-3mg/L、0.795×10-3mg/L、0.588×10-3mg/L,总体上表层海水中Cu、Zn、Pb、Cd的含量均略低于底层海水。各季度海水中重金属含量的比较结果为:Cu的含量秋季>春季>夏季>冬季,Zn的含量夏季>春季>秋季>冬季,Pb的含量秋季>夏季>春季>冬季,Cd的含量冬季>夏季>秋季>春季。湛江港湾的Cu、Zn、Pb、Cd的含量均在中部水域湛江港码头核心作业区最高,港湾外较低;Zn、Cd在港湾内的含量较高。按照单因子污染指数法评价,湛江港湾海水中的Cu、Zn、Pb、Cd含量均低于国家二类海水水质标准规定的限值,水质较好。     

维生素E醋酸酯对鱼油脂肪酸含量变化的影响

新鲜鱼油中添加05、0、2505、00 mg/kg 4种不同浓度的维生素E醋酸酯,在实验的第6、14、28、36和68天测定鱼油中的脂肪酸含量。结果表明:在500 mg/kg添加量内,维生素E醋酸酯对鱼油中脂肪酸含量没有显著性影响(P>0.05)。在实验期间,EPA(C20:5)、DHA(C22:6)、亚油酸(C18:2)含量明显下降,ARA(C20:4)、亚麻酸(C18:3)先升后降,棕榈酸(C16:1)逐步上升;C14含量逐渐增加,C17则先降后升,C16和C18在实验后期有较大提高。维生素E醋酸酯对鱼油中不饱和脂肪酸效用系数大小依次为:ARA>EPA>DHA>C18:3>0>C16:1>C18:2>C18:1,对ARA抗氧化效用最大,效用系数达到10.193%,C20:5为0.490%,C22:6为0.364%;维生素E醋酸酯对饱和脂肪酸效用系数大小依次为:C14>C17>0>C18>C16。     

含铜土壤中铜的物相分析

文章探讨了含铜土壤中铜的赋存状态 ,并对土壤中铜的物相分析方法进行了研究。结果表明 :用乙二胺浓度为 0 .0 5mol/L(pH =10 )的溶液浸取自由氧化铜 ,用含有Na2 SO3 和NH4 HF2 的H2 SO4 (0 .9mol/L)溶液浸取结合氧化铜 ,用含有硫脲 (2 0 0g/L)的HCl(1.0mol/L)溶液浸取次生硫化铜能获得满意的结果。在最佳浸取条件下对含铜土壤中的铜进行物相分析和基准矿物回收试验 ,结果满意。     

4种重金属离子及其混合液对壶状臂尾轮虫的急性毒性试验

研究了铜、锌、镉、铅离子及其混合液对壶状臂尾轮虫(Brachionusurceus)的急性毒性影响,实验结果表明,Cu2+、Zn2+、Cd2+、Pb2+对壶状臂尾轮虫的24hLC50分别为83 .18μg/L、4 .27mg/L、7. 60mg/L、23 44mg/L,将4种离子按照质量比120∶20∶6∶1的比例配成混合金属溶液,其混合液对壶状臂尾轮虫的24hLC50为0 42mg/L。     

水体中NH3-N对建鲤非特异性免疫功能的影响

用 0 .1、0 .5、1.0、2 .0和 5.0 mg/ L NH3- N分别刺激建鲤 10 d和 2 0 d后 ,测定了建鲤非特异性免疫指标 ,估测不同浓度的 NH3- N对建鲤非特异性免疫指标的影响。 0 .1、0 .5mg/ L的 NH3- N对建鲤NBT阳性细胞、溶菌酶活性无影响 ,1.0 mg/ L的 NH3- N可使 NBT阳性细胞数和溶菌酶活性降低 ,而2 .0和 5.0 mg/ L则使 NBT阳性细胞数和溶菌酶活性显著下降 ( P<0 .0 5)。这些结果表明水体中 0 .1、0 .5mg/ L的 NH3- N对建鲤非特异性免疫功能无影响 ,1.0 mg/ L的 NH3- N略有影响 ,而 2 .0和 5.0mg/ L的 NH3- N则明显降低了建鲤的非特异性免疫功能     

钻井泥浆和消油剂对合浦珠母贝稚贝的急性毒性试验

以合浦珠母贝稚贝为测试对象 ,比较了三种钻井泥浆和消油剂的 96h急性毒性效应。实验结果表明 ,钻井泥浆对合浦珠母贝稚贝的半致死浓度大于 10 5mg/ L;三种消油剂的半致死浓度分别为12 58mg/ L ,4 4 69mg/ L和 2 545mg/ L。     

5种除草剂对白鲢鱼种急性毒性试验

以白鲢（Hypophthalmicthys molitris）为实验材料，研究常用除草剂对鱼类的毒性效应。结果表明：采用直线回归法求得的96h LC50值分别为：2，4-D丁酯0．185mg/L，可信限0．138～0．247mg／L；丁草胺0．080mg/L，可信限0．067～0．097mg/L；使它隆3．80mg/L，可信限2．68—5．40mg／L；艾割18．60mg／L，可信限14．80～23．32mg/L；嗪草酮108．80mg/L，可信限91．46～129．72mg／L。对鱼类安全浓度分别为0．019mg／L，0．38mg／L，0.008mg／L，1.86mg／L and 10．88mg／L。     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter.     

Information for authors

正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet.     

Journal of Mountain Science(JMS)

<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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Information for Authors

<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research