Lipopurealins,novel bromotyrosine derivatives with long chain acyl groups,from the marine spongePsammaplysilla purea

Summary Lipopurealin-A,-B and-C have been isolated from the Okinawan marine spongePsammaplysilla purea. They are inhibitors of Na, K-ATPase, and the structures have been elucidated on the basis of spectral data. They are bromotyrosine derived structures with saturated long chain acyl parts.Physiologically active marine natural products from Porifera X. Preceding paper: Nakamura, H., Wu, H., Kobayashi, J., Nakamura, Y., Ohizumi, Y., and Hirata, Y., Tetrahedron Lett.26 (1985) 4517.     

象山港海水鱼网箱养殖试验

本文通过１９９２年６月－１９９４年１２月对鲈鱼Ｌａｔｅｏｌａｂｒａｘｊａｐｏｎｉｃｕｓ、鱼师鱼Ｓｅｒｉｏｌａｑｕｉｎｑｕｅｒａｄｉａｔｅ、状黄姑鱼Ｎｉｂｅａｍｉｃｈｔｈｉｏｉｄｅｓ、真鲷Ｂｏｇｒｏｓｏｍｕｓｍａｊｏｒ、黑鲷Ｓｐａｒｕｓｍａｃｒｏｃｅｐｈａｌｕｓ等海水鱼在象山港海区进行网箱生产性养殖试验，探讨了试养鱼类的生长、成活率与产量。认为上述５种鱼类均适合在象山港海水网箱中养殖，其中鲈鱼为最佳鱼种，真鲷、黑鲷、鱼师鱼为较佳鱼种。     

秦皇岛全新世海岸的演化和现代海岸的保护

秦皇岛海岸东自山海关西至洋河口。经过六十年代与八十年代两个时期对岸带的调查与实验分析资料的对比,作者认为其全新世时期的发育演化分为四个阶段:1)距今七千年前的海退阶段,2)距今七千年至五千年的海进阶段,3)距今五千年至三千年的海退阶段,4)距今三千年来的海进阶段。本文还论述了海岸带现代侵蚀问题,认为遭受侵蚀的原因有:海面的上升,沿海河流建水坝和茌河床及岸带大量挖砂使海岸带泥沙供应减少。此外,还对海岸的保护提出了具体的建议。     

海洋细菌Pseudomonas sp.7-11产碱性蛋白酶的研究

本文研究了海洋细菌Pseudomonas sp.7-11产碱性蛋白酶的发酵条件及调控机制，并对该蛋白酶进行了分离纯化，实验结果显示，7－11为好氧菌，具有某些嗜低温的特性，而且适宜在偏碱性的条件下生长并产酶；酪蛋白培养基适合该菌株产酶；K^＋对产酶起关键作用；复合氨基酸对产酶有抑制作用，发酵液经盐析和离子交换层析等得到了两个活性峰，其中一个峰达到电泳纯，因此该菌产生蛋白酶不止一种。     

海水鱼网箱养殖对比试验

本文通过１９９１年６月－１９９３年９月对１３种海水鱼网箱对比试养，探讨了各筛选鱼类的生长、增长率、摄饵量、饵料系数、适应范围与成活率，提出状黄姑鱼Ｎｉｂｅａｍｉｉｃｈｔｈｉｏｉｄｅｓ、鲈鱼Ｌａｔｅｏｌａｂｒａｘｊａｐｏｎｉｃｕｓ、鱼Ｍｉｉｃｈｔｈｙｓｍｉｉｕｙ、真鲷Ｂｏｇｒｏｓｏｍｕｓｍａｊｏｒ、石斑鱼Ｅｐｉｎｅｐｈｅｌｕｓ、黑鲷Ｓｐａｒｕｓｍａｃｒｏｃｅｐｈａｌｕｓ以及卵形鲳Ｔｒａｃｈｉｎｏｔｕｓｏｖａｔｕｓ是目前适合于浙江海区环境与技术经济条件的增养殖鱼种，状黄姑鱼、鱼、鲈鱼为最佳鱼种，石斑鱼、真鲷、黑鲷是优良鱼种，卵形鲳是较佳鱼种。     

海洋钻井隔水管非线性时域动力分析

本文用有限单元法对海洋钻井隔水管进行非线性时间域动力分析,建立了力学分析模型,推导了有限元动力方程,采用纽马克积分法求解。数值计算结果表明,理论分析是正确的,计算精度可满足工程要求。文章还对隔水管力学强度的各种影响因素进行了讨论。本文所提供的动力分析法及计算机程序可供海洋石油设计部门参考使用。     

Ecological functioning of free-living marine nematodes in coastal wetlands: an overview

Nematodes are small multicellular, thread-like organisms, inhabiting almost all conceivable environments; among these, some 25 % are free-living marine forms with a population density of （1-12） × 10^6 inds m^-2 in seabed sediment, reaching maximum values in muddy estuaries and salt marshes. A large quantity of carbon from the salt marsh plants enters the ecosystem via the detritus pathway, in which nematodes play an important role through their feeding and bioturbation activities. Vegetation influences the sedimentary environment and modifies the distribution pattern of nematode communities in coastal wetlands. Nematodes are coupled closely with bacteria/detritus in microbial food webs, stimulating bacterial growth and subsequent nutrient remineralization; they provide food sources for higher trophic levels and serve as a linkage between micro- and macro-fauna. Furthermore, nematodes have a potential to provide proxies that can be used in diagnosing environmental quality. In China, only a limited number of nematode data sets are available for the coastal wetlands across several different climatic zones. It is necessary to carry out additional investigations into the biology and ecology of nematodes in order to delineate their ecological functioning in coastal wetlands. On such a basis, the contribution made by nematodes to material cycling and the ecological functioning in coastal wetlands can be quantified. The assessment of their biological diversity should be a focus, which is fundamental in the study of wetland ecosystem dynamic mechanisms. In addition to laboratory and mesocosm experiments, mathematical models should be established to predict the responses of ecosystem to the environmental disturbance. Finally, it is necessary to improve the techniques for nematode analysis, to enhance the efficiency of data acquisition.     

储层厚度和电阻率对海洋可控源电磁法的影响分析

随着海底油气资源勘探的进行,海洋可控源电磁法（CSEM）成为研究的热点。本文采用二维自适应有限元正演程序MARE2DCSEM,建立正演模型,模拟了不同厚度、电阻率对异常的影响。模拟结果表明：厚度一定时,MVO曲线和电阻率先成正比例,而在达到最大响应的收发距时则随之减少;电阻率相同时,厚度从小渐渐增大时,MVO曲线逐渐增大,在达到最大响应的收发距时则随之减小;储层厚度和电阻率变化是一个体积效应,当乘积相同时,归一化曲线差别很小,大约在2%左右,这为反演提供了理论依据。     

盐城沿海海洋药物与保健品资源及其开发利用现状的调查

调查发现盐城海洋药物与海洋保健品生物资源丰富,其中优势种类近20种,如蛤、海带等。目前,盐城市对海洋药物的开发利用几乎是空白,而海洋保健品的开发利用正处于起步阶段。     

波浪浮标系统设计与测波方法研究

介绍了波浪浮标系统的总体设计方案和各功能模块的主要工作原理,重点介绍了波浪浮标采集系统的电路设计,实现方法和工作原理,包括微处理器模块、GPS模块、加速度传感器模块。创造性地提出了多传感器的设计方案,使波浪浮标采集的数据更加的精确。介绍了波浪浮标对波浪参数的测量算法,包括波高、波周期、波向、功率谱和方向图等。最后介绍了波浪反演软件,通过实际对波浪的测量证明了测波算法的合理性和整个系统的有效性。