平邑磨坊沟金矿床矿物包裹体特征及与成矿阶段的关系

对磨坊沟金矿床流体包裹体进行了测试研究 ,结果表明主要成矿阶段的温度为 1 2 0～360℃ ,包裹体盐度在 0 .35 %～ 2 0 .6%之间 ,压力在 1 .73× 1 0 5～ 44.1 8× 1 0 5Pa之间 ,密度为0 .80～ 1 .0 9g/cm3。推测该矿床形成深度为 5 0 0～ 1 0 0 0m ,成矿流体来源于岩浆水和大气降水。     

两个凡纳滨对虾亲本群体的RAPD研究

采用Operon公司的 16个引物对两批凡纳滨对虾亲虾的基因组DNA多态性进行了检测 ,结果表明 ,第一个亲本群体对 16个引物共检测到 78个位点 ,其中多态位点数为 4 8个 ,占 6 1.5 4% ;第二个亲本群体共获得 97个位点 ,其中多态位点数为 4 9个 ,占 5 0 .5 2 %。单个引物获得的标记数为 1～ 8个。第一个亲本群体个体间的平均遗传距离为 0 .196 0± 0 .0 392 ,第二个亲本群体个体间的平均遗传距离为 0 .0 92 2± 0 .0 189。两个亲本群体间的多态位点比例为 6 6 .98% ,遗传距离为0 345 5± 0 .0 795。在OPF 0 9、OPV 19、OPZ 113个引物的扩增结果中 ,发现两个亲本群体有明显差异。     

盐度渐变和骤变对褐点石斑鱼存活和摄饵的影响

以人工育苗所得的褐点石斑鱼苗为材料,水温28～31.5℃下,盐度范围0～70以组间距5共设置15个梯度,分别进行盐度渐变和骤变对鱼苗存活和摄饵影响的研究。结果表明:渐变实验中,以5/d升高或者降低盐度时,盐度10～55之间,鱼苗存活率100%;而在盐度降低至5时,平均存活时间为15.16 h,24 h存活率19.1%;盐度降至0,平均存活时间7.92 h,24 h存活率为0,盐度0时其平均存活时间与盐度5时的平均存活时间有极显著差异(P<0.01);盐度60,鱼苗基本不摄食,24 h平均存活时间38.51h,24 h存活率为89.8%,24～48 h存活率为89.8%;盐度65,鱼苗不摄食,平均存活时间10.95 h,24 h存活率0%;盐度65平均存活时间与盐度60之间有极显著差异(P<0.01);鱼苗在盐度25～45间摄食活动活跃。骤变实验中,盐度5～50,鱼苗存活时间>48 h;盐度0,24 h存活率5%,48 h存活率为0;盐度55,24 h存活率100%,24～48 h间存活率83.3%;盐度60,24 h存活率44.1%,48 h存活率降至11.1%;鱼苗在盐度65、70中24 h存活率0%;盐度0、65、70的处理组48 h平均存活时间的显著短于其它各组,盐度0～5、55～70为褐点石斑鱼苗骤变的极限生存盐度。     

锯缘青蟹围塘养殖试验

1998～ 1999年间在阳东县采用改造蟹池、水质调控、合理投饵、轮捕轮放等技术进行锯缘青蟹围塘养殖试验。结果表明 ,锯缘青蟹成活率为 70 .9% ,比 1998年提高 4 0 % ;平均产量 32 6 7kg hm2 ,比 1998年提高 12 2 .3%。 1999年与 2 0 0 0年推广养殖面积各为 10 3hm2 与 137.3hm2 ,平均产量分别为 30 5 9kg hm2 与 3132kg hm2 ,与 1998年相比分别提高 10 8.3%与 113.3%。     

大黄鱼库道虫病的初步研究

在广东湛江海水网箱养殖的大黄鱼 (Pseudosciaenacrocea)中发现了库道虫病 (Kudoasis) ,检出率高达 31%。其症状表现为 :白色孢囊分布于胸鳍、腹鳍、臀鳍和尾鳍等的鳍膜下 ,剖检时发现腹壁和背部肌肉中布满许多白色呈球形或椭圆形的小孢囊 ,在肠系膜、腹膜以及近口腔的粘膜上也有大量的白色小孢囊分布。镜检发现孢囊中含有典型的库道虫 ,其孢子宽为 ( 8 90± 0 55) μm ,长为 ( 8 35± 0 4 6 ) μm ,极囊宽为 ( 2 39± 0 36 ) μm ,极囊长为 ( 4 4 8± 0 39) μm。孢子在淡水中 2 0min后全部死亡 ,在盐度为 6的水体中 ,12h和 2 4h后存活率分别约为 87.4 %和 70 % ;在盐度为 16、2 6和 36的水体中 ,孢子存活率均为 10 0 % ;在盐度为 4 6的水体中 ,12h和 2 4h后存活率分别约为92 %和 84 %。孢子对低温有较强的耐受力 ,当水温达到 4 4℃时 ,8h、12h和 2 4h后 ,孢子的存活率分别约为 91%、80 .5%和 6 6 %。     

正交设计法提取江蓠高活性膳食纤维

采用正交设计法 ,研究了江蓠高活性膳食纤维的提取工艺条件 ,筛选出江蓠碱处理和漂白的最佳工艺条件 ,提取出江蓠高活性膳食纤维。结果表明 ,江蓠高活性膳食纤维的产率达 2 8.3% ,颜色较白 ,膳食纤维干基质量分数达 92 .83% ,钙质量分数 1.0 8% ,磷质量分数 0 .0 6 8% ,膨胀力为 9.0 m L / g,持水力为 82 5% ,质量和功能性指标远远超过西方国家麸皮膳食纤维的标准 (膳食纤维干基质量分数 4 7%、膨胀力 4 m L/ g、持水力 4 0 0 % )     

沙虫干呈味及功能性成分研究

对沙虫干抽提物成分的组成进行的研究结果表明 :游离氨基酸含量 w为 10 .3% ,占抽提物含氮物质的 77.9%。抽提物组成中 ,呈甘味的 Gly(3.2 % )、Ala(2 .5% )和呈鲜味的 IMP(0 .2 7% )、Glu(0 .2 5% )、琥珀酸 (0 .35% )等成分同沙虫干独特的风味有关 ,Na 、Cl-等无机离子也同其呈味相关。此外 ,牛磺酸含量 w高达 3.2 % ,是富含牛磺酸的一种海洋生物 ;精氨酸的含量 w亦较高 ,为 1.2 %。     

黄鳍鲷肌肉生化成分分析和营养品质评价

测定了 6尾黄鳍鲷肌肉的生化成分 ,并对其营养价值进行评定。结果表明 ,该鱼肌中各成分的质量分数为粗蛋白 2 1.10 % ,粗脂肪 1.31% ,粗灰分 1.5 0 % ,水分 74 .4 0 %。干物质中水解氨基酸总量w 76 .38% ,其中必需氨基酸w 32 .4 6 % ,占氨基酸总量的 4 2 .5 % ;呈味氨基酸w 32 .5 1% ,占氨基酸总量的 4 2 5 6 %。蛋氨酸为第一限制氨基酸 ,赖氨酸含量 (每克氮中 )最高 ,达 4 94mg·g-1。牛磺酸含量为 30 4 0mg kg。认为黄鳍鲷是一种高蛋白、低脂肪的美味优良食物 ,应注意种质资源的保护。     

硝酸银络合法浓缩金枪鱼鱼油多不饱和脂肪酸的研究

以金枪鱼鱼油混合脂肪酸为材料 ,利用硝酸银络合法浓缩其中的多不饱和脂肪酸 (PU FA) ,主要考察了搅拌时间和硝酸银浓度对产品得率和EPA和DHA含量的影响 ,并测定了产品的理化指标和脂肪酸组成。研究结果表明 :搅拌时间为 6 0min ,硝酸银浓度为 4mol/L时得到的产品得率为 18.0 3% ,浓缩产品中的EPA和DHA的质量分数分别为 9.78%和 86 .0 7% ,总质量分数达95 .85 % ,过氧化值为 7.35mmol/kg ,碘值 2 6 0 8.9g/kg。     

煤变油参考资料

美国石油日消耗量约为 190 0万桶 (按吨 7.3桶计算 ,年消费石油 9.5亿ｔ) ,其中进口为日 110 0万桶 (年 5 .5亿ｔ) ,占 5 7.89%。在进口石油中 ,沙特石油占 15 % (《参考消息》2 0 0 1年 11月 2 5日 )。截止 2 0 0 0年底 ,中国累计探明石油储量 :陆上 145亿ｔ,海上 2 4.4亿ｔ。 (央视 6月 2 1日“新闻联播”)当前中国的采油工艺技术水平 ,对油田探明的石油资源量可回收 40 %左右。大庆油田已进入晚期开发 ,至今没有找到可接替的特大油田。受石油资源状况限制 ,今后若干年只能维持年产 1.7亿ｔ水平。 2 0 0 0年中国石油进口高达 70 0 0多万ｔ…     

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