Several significant hydrographic characteristics and their formation mechanism in the South China Sea during the spring and summer of 1998

INTRODUCTIONTheSCSisthelargestmarginseainthewestoftheNorthPacificOcean .Theprevailingwindinwinterisnortheast,whileinsummeritissouthwest .Itisstilluncertainthathowthecirculationandtemperature -salinityfieldassociatewiththemonsoonforcingandaccompanywithseveralkindsofvariationsbeforeorafterthesummermonsoonburst .DuringSECMEXin 1 998,twointensiveobservationperiods (IOP)havebeencarriedoutntheSCS (Fig 1 ) :IOP1 ,from 1 0Aprilto 5May ;IOP2 ,from 1 2JunetoJuly 6 ,inordertounderstandthe…     

海湾扇贝养殖群体遗传多样性的研究

用等位基因酶的聚丙烯酰胺凝胶电泳技术,研究了大连沿岸不同生态环境条件下的大李家湾低排筏、大李家湾高排筏、凌水桥、棋盘磨4个海湾扇贝养殖群体的遗传多样性.在4个群体的7种等位基因酶和闭壳肌蛋白中均检测到了22个基因位点,各群体的多态位点比例分别为22.73%,22.73%,22.73%,18.18%(P≤0.95)和27.27%,27.27%,31.82%,36.36%(P≤0.99);杂合度观测值分别为0.064,0.071,0.075,0.069;Hardy-Weinberg平衡偏离指数分别为-0.068,-0.020,-0.032,-0.050;近交系数分别为0.568,0.565,0.487,0.550;位点等位基因有效数分别为1.102,1.109,1.143,1.122;遗传变异综合评价指数分别为0.0060,0.0071,0.0088,0.0073.海湾扇贝养殖群体遗传多样性总体水平较低,但在这4个群体中,凌水桥群体的遗传多样性水平最高,大李家湾高排筏和棋盘磨群体的遗传多样性水平较高,大李家湾低排筏群体遗传多样性水平最低.     

AHP RESIN AND ITS URANIUM ADSORPTION MECHANISM

I. INTRODUCTION AHP resin is a new type of adsorbent and has been studied by the units concernedfor several years. There is little report about this work so far. AHP resin was synthesizedin aqueous phase with tetra-ethylene pentamine (TEPA), epichlorohydrin (ECH) andC-reagent as raw materials, and basic zinc carbonate (P_Z_n) and rubber solvent oil (120Gasoline) as pore-forming material. Compared with the technique of the amorphous lumpresin and that of the resin synthesized in oil phase, the new technique of resin synthesizedin aqueous phase manifests many advantages, such as raising the capacity of uranium-adsorption of the resin, simplifying the after-treatment process, reducing the cost, etc. Sea water, in which all kinds of cation and anion exist, is a system of electrolytes,and the concentrations of many ions are higher than the concentration of uranium for     

A COMPARATIVE STUDY OF 1982-1983 EL NIÑO EVENT

The 1982-1983 El Niño event is examined in comparison with the other El Niño events in 1949-1983. The relationships of subtropical high to the sea surface temperature (SST) show the important influence of the atter, which vaired with the characters of El Niño events.     

头足类视觉特性的电生理研究 Ⅰ.无针乌贼视网膜电图的特性

乌贼是重要的海洋水产资源之一,对其视觉特性的研究在理论上和实践上显然都有一定的意义。视网膜电图(ERG)作为网膜的综合电活动是反映视觉特性的一个良好指标。乌贼的ERG的特性至今缺乏系统的研究。本文对其ERG的波形和适应特性作了较详细的描述。续文将报导对ERG的光谱敏感性的分析。     

网格剖分积分法计算富钴结壳资源量

在矿区地质模型建立及边界条件限定的基础上,提出了基于网格剖分积分计算富钴结壳资源量的评估计算方法,推导了相应的计算公式,设计了相应的模块界面,并在"海底地形地貌自动成图系统"中实现了这种计算方法.这种资源量计算方法可应用于富钴结壳资源研究和评价计算.     

莱西市水资源管理系统的人机互动功能

本文结合莱西市水资源管理的基本特性,采用人机交互管理方式,成功地运用地理信息系统(GIS),实现了界面良好的莱西市水资源信息系统的各种功能,为规范水资源业务管理的程序、开展地区水资源管理信息系统化建设,提供了有力的技术支持。     

两种海洋微藻硝酸还原酶活性测定方法的比较研究

对6种常见海洋微藻的硝酸还原酶活性测定方法进行了初步研究。确立了离体法和活体法的提取(振荡)时间及酶促反应时间,分别为:5 min,30 min(离体法)和6 min,10 min(活体法),并对2种方法进行了对比。结果表明:在本文条件下,离体法较活体法更适于进行塔玛亚历山大藻(Alexandrium tamarense)、强壮前沟藻(Amphidinium carterae)、中肋骨条藻(Skeletonema costatum)、新月菱形藻(Nitzchia closterium)和旋链角毛藻(Chaetoceros curvisetus)的硝酸还原酶活性的测定;活体法更适于东海原甲藻(Prorocentrum donghainase)硝酸还原酶活性的测定。     

Bulk particulate organic carbon in the East China Sea: Tidal influence and bottom transport

Five oceanographic surveys were carried out in the East China Sea (ECS) and Yellow Sea from 1999 to 2003. In all, seven different sections were surveyed, but one section (the PN section) was observed on every cruise. Two time-series stations were also surveyed, one located at the Changjiang River mouth, the other over the continental shelf in the PN section.We identified biogeochemical characteristics for waters close to the Changjiang Estuary and in the Kuroshio waters (KW), respectively. Resuspension is a strong feature near bottom over the ECS continental shelf, with suspended matter values 13 times higher than that for the surface. A model of particulate organic carbon (POC) dynamics based on a rectangle equation reveals that POC concentration close to the Changjiang Estuary varies with a semidiurnal period of ∼13 h, coinciding with the tidal period. The upper limit for POC residence times in the seasons we covered over the shelf are estimated to be on the order of weeks and generally increase seaward from near the Changjiang Estuary to the KW. Short POC residence times suggest that POC in the ECS is rapidly exported from euphotic waters.A nepheloid layer, observed as elevated suspended matter in near the bottom of the water column, is important in particle transfer over the shelf, especially in winter when the residual current flows mainly eastward. Cross-shelf transport of POC via the nepheloid layer is estimated to be 0.22 × 10¹² g yr⁻¹. Comparison with other work indicates that POC transport is ∼2% of the Changjiang POC input.     

移动式海上基地(MOB)连接器动力响应试验研究

移动式海上基地(Mobile Offishore Base，MOB)是由若干半潜模块相连而成的超大型浮式结构物。在进行海上作业时，模块间的连接器将会产生巨大的载荷。用缩尺比为1：100的三模块MOB模型在实验室进行了连接器动力响应试验研究。文中对试验的关键问题，如连接器模型的设计、制作、安装、试验工况的确定和测试方法等作了较详细的介绍。