Relationship between biogeochemical features of biogenic elements and flocculation in the Changjiang Estuary   总被引：1，自引：3，他引：1  

Lin Yi''an  Tang Renyou  Li Yan  Dong Henglin  Guan Xuwei  Chen Yinzu 《海洋学报(英文版)》1995,14(2):225-234

ＲｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｂｉｏｇｅｏｃｈｅｍｉｃａｌｆｅａｔｕｒｅｓｏｆｂｉｏｇｅｎｉｃｅｌｅｍｅｎｔｓａｎｄｆｌｏｃｃｕｌａｔｉｏｎｉｎｔｈｅＣｈａｎｇｊｉａｎｇＥｓｔｕａｒｙ￥ＬｉｎＹｉ＇ａｎ；ＴａｎｇＲｅｎｙｏｕ；ＬｉＹａｎ；Ｄｏ...  相似文献   

赤点石斑鱼人工配合饵料中蛋白质最适含量的研究   总被引：11，自引：1，他引：11  

陈学豪  林利民  洪惠馨 《台湾海峡》1995,(4)

本文探讨了不同蛋白质含量的配合饵料对赤点石斑鱼（Epinephelusakaara）生长的影响。通过60d度验得出：在各配合饵料组中，蛋白质含量为49．52％的试验的相对增重率（46．84％）体长相对增长率（15．96％）、蛋白质效率（60．35％）和饵料转化率（29．85％）等均为最佳。配合饵料组鱼体肌肉营养成分（蛋白质、脂肪、氨基酸和鲜味氨基酸）也均优于对照组，而更接近野生鱼。经回归方程分析，赤点石斑鱼人工配合饵料中蛋白质最适含量为48．37％～49．24％。  相似文献   

海湾扇贝肝素样多糖分离方法的研究     

王长云  管华诗  林洪 《海洋与湖沼》1995,26(S1):66-69

于1992年1月-1993年2月，对从海湾扇贝中提取获得的糖胺聚糖（GAG）用乙醇和溴化十六烷基三甲铵（CTAB）分级分离，并对所得制品用琼脂糖凝胶电泳和高效液相色谱验证，以研究一种简便、快速的分离提纯方法。结果表明，扇贝GAG水溶液在乙醇量60％时分离获得的级分，其GAG－GTAB给合物再用2.0 mol/LNaCl溶液解离得到的主要级分，琼脂糖凝胶电泳和高效液相色谱均显示出单一区带，红外光谱类似干肝素的。证明这一提纯过程是一简便、快速的分离提纯方法。  相似文献   

北方劳德藻配子和复大孢子的产生   总被引：8，自引：0，他引：8  

林均民  翁师德 《海洋与湖沼》1994,25(6):601-605

于１９８６年１０月在厦门近岸采集北方劳德藻，从培养中观察其有性生殖和光对生殖的影响。结果表明，该藻只有宽度为２６－４０μｍ的细胞能形成配子和复大孢子；在光照条件下每昼夜只发生１次性化；雌雄配子以不同发育方式形成，配子发生呈现一定的时间程序；强光照和１６ｈ光周期最适于性化。由此得知，引起性化既依赖适当的细胞大小，又依赖光诱导的外部因素；产生两种精子数目是与精原孢囊的体积大小紧密相关；性化与光强度之间  相似文献   

Paraconchoecia diacanthus n. sp., a new species of planktonic Ostracoda     

Chen Ruixiang  Lin Jinghong 《海洋学报(英文版)》1994,13(2):269-274

Ｐａｒａｃｏｎｃｈｏｅｃｉａｄｉａｃａｎｔｈｕｓｎ．ｓｐ．,ａｎｅｗｓｐｅｃｉｅｓｏｆｐｌａｎｋｔｏｎｉｃＯｓｔｒａｃｏｄａ￥ＣｈｅｎＲｕｉｘｉａｎｇａｎｄＬｉｎＪｉｎｇｈｏｎｇ（ＲｅｃｅｉｖｅｄＡｐｒｉｌ１６,１９９３１ａｃｃｅｐｔｅｄＪｕｌｙ２０...  相似文献   

污水-海水混合过程中磷转移的动力学   总被引：5，自引：0，他引：5       下载免费PDF全文

陈松  林汝健  廖文卓 《海洋与湖沼》1993,24(1):59-64

模拟研究厦门市污水排海时污水-海水混合过程中磷含量和形态的变化,及其在海水-颗粒物界面交换的动力学过程;提供转移模式,确定转移速率,进行磷的容量校正,为厦门西海域环境容量估算和水质控制提供定量参数和理论依据。  相似文献   

周期浅析     

战淑芸  杨淑瑞 《海洋预报》1992,9(4):47-51

本文分析了滑动平均的数据处理方法对周期分析结果产生的影响。提出了过程变量同号积分的数据处理方法,并对亚洲西风指数序列进行了试验分析。分析结果表明,周期的长短与振幅的大小有密切关系,亚洲逐日西风指数的周期振荡具有明显的季节特征。  相似文献   

Interfacial geochemistry of barium in suspension and sediment from Zhujiang Estuary     

Zeng Xiangfei  Zheng Jianlu  Lin Zhiqing  Liang Ziqiang  Chan Kwanming 《海洋学报(英文版)》1990,9(2):247-254

Chemical forms of Ba are determined in samples of suspension and sediment from the Zhujiang Estuary. Their interfacial geochemical processes are discussed. Total suspended Ba content is between 2. 4 and 40. 4 μg/L, and mostly exists in the crystalline form (43. 5%), secondly in the Fe-Mn oxidative form (23.1%). Percentages of organic, carbonate and exchangeable forms are 14. 8%, 11. l%and 7.4%, respectively. Total content of Ba in the sediment is between 158. 6 and 48. 0 ug/g. Percentages of crystalline form, Fe-Mn oxidative form and carbonate form are 78. 4% ,13. 5%and 8. 2%, respectively. Organic and exchangeable forms are not detected. The study on the mechanism of interfacial movement suggests that the salinity range of 10 is the turning point for the varied distribution of Ba. The subsidence of crystalline form affects the decrease of Ba content in suspension. The decrease mostly takes place in the salinity range lower than 10, which corresponds to the high value of Ba content in the sediment. The  相似文献   

VERIFICATION OF INTERNAL WAVES IN OFFSHORE AREAS BY MEANS OF CURRENT OBSERVATIONS     

束星北  耿世江  顾学俊  孙洪亮  王祯祥  赵俊生 《海洋学报(英文版)》1986,5(2):165-172

Based on the shear effect of internal wave currents in stratified fluid, the necessary condition for the possible existence of an internal wave and the sufficient condition under which there will be no internal wave are deduced starting from the continuity equation of incompressible fluid. The above two conditions are verified by the measured results from vertical current meter arraies at some observation stations in the Bohai Sea and the South Huanghai Sea. In the treatment of measured results, first of all, the tidal period components are separated from the measured currents by Fourier-analysis method, and then the internal wave currents of tidal period from the tidal period components in the light of some considerations. The analytical results of observed currents are well consistent with theoretical analysis. Furthermore, one can also deduce some features of internal waves therefrom. Consequently, it is concluded that the observation from a vertical current meter array is an important means to verif  相似文献   

On the recovery of surface wave by pressure transfer function     

Cheng-Han Tsai  Min-Chih Huang  Fu-Ji Young  Yin-Chern Lin  Hsien-Wen Li 《Ocean Engineering》2005,32(10):4936-1259

Except the commonly selected pressure transfer function derived from the linear wave theory, a previous study on the pressure transfer function for recovering surface wave from underwater pressure transducer suggested that the pressure transfer function is a function of frequency parameter only. With careful analysis, this study showed that the pressure transfer function should include a transducer submergence parameter as that given by the linear theory. It was found that the previously suggested empirical formula should be restricted to measurements with the pressure transducer close to the surface; otherwise overestimation of wave height would result. Field measurements were carried out with an acoustic wave gauge and a synchronized pressure transducer located at various depths with submergence parameter close to 1 (near the sea floor). It was shown that the previous one-parameter empirical formula might overestimate the significant wave height by more than 30%. This study found that with deep-water wave bursts excluded, the transfer function based on the linear wave theory provided a fairly good estimation on the significant wave heights, with an average deviation of 3.6%.  相似文献