南大洋深海嗜冷菌2-5-10-1及其低温脂肪酶的研究   总被引：14，自引：0，他引：14  

林学政  杨秀霞  边际  黄晓航 《海洋学报》2005,27(3):154-158

从南大洋普里兹湾的水样中筛选到一株产低温脂肪酶的深海嗜冷菌2-5-10-1,对其生长及产酶情况和酶性质做了初步研究.该菌株的最适生长温度为5℃,此时分泌的胞外脂肪酶最多;添加Tween80,橄榄油可显著促进脂肪酶的产生.该脂肪酶的最适作用温度为35℃,在0～20℃均保持较高的酶活性,在0℃可保持37%的相对酶活性;酶的最适作用的pH值为7.5,在pH6～9的范围内均存在较高酶活性;对热较敏感,在60℃保温15min可丧失50%以上的酶活性.该脂肪酶的催化作用不需要金属离子的参与,Cu2+和Zn2+对酶活有着强烈的抑制作用.  相似文献   

东海陆架外缘隆起带地质构造特征   总被引：1，自引：0，他引：1  

李桂群  李学伦 《中国海洋大学学报(自然科学版)》1995,(2)

根据地质、地球物理及钻探资料，结合周边区域地质资料，论证东海外缘隆起带前中中新世基底岩系组成及地质构造特征。  相似文献   

断阶型潜山带地质模型的建立及储层预测--以CG20潜山为例     

姜素华  王永诗  张家震  王军 《中国海洋大学学报(自然科学版)》2004,34(3):437-445

以 CG2 0潜山为例 ,从建立地质模型入手 ,包括地层模型、构造模型、储集模型、储盖组合模型、速度模型等 ,认识到各套地层分布和储层物性的差异均与地震响应密切相关 ,因此可以利用地震波的信息 ,预测潜山储层的发育及分布情况。在对 CG2 0潜山进行精细全三维构造解释的基础上 ,探讨性地应用了测井约束反演、吸收系数、相干分析及三维模式识别等技术 ,对潜山储层进行了预测 ,从而提高了潜山勘探的效益 ,并为类似断阶型潜山带的勘探提供了成功的经验 ,具有一定的指导意义。  相似文献   

深水网箱投饵机设计与试验研究   总被引：15，自引：0，他引：15  

宋协法  路士森 《中国海洋大学学报(自然科学版)》2006,36(3):405-409

根据网箱养殖的特点,结合网箱养殖的经验,设计了1种深水网箱投饵机,并进行了相应的试验,测定了不同情况下产生的真空度以及在冲饵管和吸饵管不同开度时的下料时间。此投饵机使用水力环流供饵、水力抽负吸饵、水动力投饵,充分利用了丰富的海水资源,用汽油机水泵作动力,利用管道将饵料抛向网箱,可向多个、距离不同的网箱供饵。作为1种新的投饵机具,可用于网箱养鱼和池塘养鱼的投饵。  相似文献   

Benthic Metabolism and Standing Stock in the Central and Northern Deep Red Sea     

H. Thiel    O. Pfannkuche    R. Theeg  G. Schriever 《Marine Ecology》1987,8(1):1-20

Abstract. Benthic metabolism and standing stocks were investigated in the deep Red Sea between 21^o and 27^oN, Activity was assessed by the determination of respiration rates with a shipboard method and by calculating oxygen consumption from the activity in the electron transport system. We attempted to compare results from different latitudes within the warm Red Sea and with data from cold Atlantic environments. Our investigations were part of an environmental risk assessment to evaluate future mining of metalliferous sediments from the Atlantis II Deep.  相似文献   

烟台市污水处理深海排放工程设计方案研究与选择   总被引：2，自引：0，他引：2  

王文喜  李明基 《海岸工程》1997,16(1):30-35

沿海城市污水处理深海排放工程在我国起步较晚，烟台市污水处理深海排放工程我国目前规模最大的同类工程，且已进入施工阶段，本文详细阐述了该工程及水工设计方案，在我国城市污水２深海排放工程领域作了积极有益的探索。  相似文献   

山东全新世滨海软土与工程地质灾害的研究   总被引：2，自引：0，他引：2  

吴建政 《海洋地质与第四纪地质》1995,15(3):43-54

山东全新世滨海软土分布在海湾、泻湖、河口区，厚度１－１０ｍ。海湾、泻湖软土为淤泥、淤泥质土，陆源物质供应丰富的浅水区，软土颗粒偏粗，强度相对较高，触变性对建筑物危害性大，陆源物质供应少的深水区，软土颗粒偏细，低强度、高压缩性、沉降变形大和蠕变性是危及建筑物稳定的主要因素。海湾、泻湖软土位于地下水位下，具低透水性，掩埋后短期不易排水固结，软土下为强度较高的冲积物，对一般建筑物，利用强夯、粉喷搅拌桩、  相似文献   

烟台套子湾八角深水港的开发研究     

戚立心  王全东 《海岸工程》1996,15(4):9-19

通过调查和比较，认为在我国渤海和北黄海南岸的套子湾八角海区是一个条件优越的深水港址，在阐述开发八角深水港的重要意义同时，根据城市布局规划和岸线及水域资源，参照国际港口未来发展趋势，结合我国对中、西部地区经济发展战略，对八角深水港的开发和布局进行了研究，为烟台市发展成为“现代化、国际型港口城市”，提出了港区未来建设的模式。  相似文献   

A Study on the Dynamic Analysis of A Tracked Vehicle for Ocean Mining on the Deep Seabed     

Hyung-suk HAN 《中国海洋工程》2003,17(3)

1 .IntroductionOnthedeepseabed ,30 0 0～ 50 0 0mbelowthePacificOcean ,manganesenodulesaresolidifiedandspread ,andmanycountriesintheworldarestudyinghowtominethem .AccordingtoYamazakietal.( 1 998)andAmannetal.( 1 991 ) ,theenvironmentofthedeepseabedisdifferentfromthedrylandinmanyways .Inparticular,thesurfaceoftheseabedisverysoft.Inordertoensuretheperformanceofrunningofamanganesenodulemineronsuchasoftsurface ,thetrackedvehiclemaybeapplied .Ac cordingtoHongandChoi ( 2 0 0 1 ) ,astudyisbeingdone…  相似文献   

Macrofauna Communities in the Eastern Mediterranean Deep Sea   总被引：1，自引：0，他引：1  

Ingrid Kröncke  Michael Türkay  & Dieter Fiege 《Marine Ecology》2003,24(3):193-216

Abstract. During two expeditions with RV ‘Meteor’ in summer 1993 and winter 1997/98 the structural and functional diversity of the benthic system of the highly oligotrophic eastern Mediterranean deep sea was investigated. The macrofauna communities were dominated by polychaetes even at the deepest stations. The fauna at shallow stations was dominated by surface deposit feeders, whereas subsurface deposit feeders and predators generally increased with depth. A high percentage of suspension‐feeding Porifera was found in the Levantine Basin. Mean abundance and number of taxa of both expeditions were significantly correlated to depth and distance to the nearest coast as well as to the total organic carbon (TOC) content in sediments. Numbers of taxa and abundance decreased generally with depth, although lowest numbers were not found at the deepest stations but in the extremely oligotrophic Levantine and Ierapetra Basin. Biomass measured during the second cruise was extremely low in the Ierapetra Basin and comparable to other extreme oligotrophic seas. The significant correlations found for TOC contents and macrofauna with distance to coast during both expeditions apparently reflect the role of hydrographically governed transport of organic matter produced in coastal regions into greater and extreme depths of the Mediterranean Sea. Seasonal differences in macrofauna communities due to seasonal differences in food supply were not found. However, recent large‐scale hydrographic changes (Eastern Mediterranean Transient, EMT) might change the oligotrophy and, thus, the structure of the benthic communities in the Eastern Mediterranean deep sea.  相似文献