不同生长期坛紫菜多糖中组分含量的变化   总被引：3，自引：0，他引：3  

高洪峰  纪明候  曹文达 《海洋与湖沼》1994,25(5):505-509

于１９９０－１９９１年，运用＾１３Ｃ－ＮＭＲ和化学分析方法研究南方产和移植北方养殖的不同生长发育阶段坛紫菜多糖的组分变化，结果表明，随着藻体生长发育，坛紫菜琼胶中３，６－内醚－Ｌ－半乳糖和６－ＯＣＨ３－Ｄ－半乳糖的含量逐渐增加，而硫酸基的含量呈现先增加后减少的规律；北移坛紫菜琼胶中３，６－内醚－Ｌ－半乳糖的含量高于南方坛紫菜，而硫酸基和６－ＯＣＨ３－Ｄ－半乳糖的含量低于南方坛紫菜。  相似文献   

REE distribution in water-sediment interface system at deep ocean floor     

Zhang Lijie  Liu Jihu  Yao De 《海洋学报(英文版)》1994,13(4):519-526

ＲＥＥｄｉｓｔｒｉｂｕｔｉｏｎｉｎｗａｔｅｒ－ｓｅｄｉｍｅｎｔｉｎｔｅｒｆａｃｅｓｙｓｔｅｍａｔｄｅｅｐｏｃｅａｎｆｌｏｏｒ￥ＺｈａｎｇＬｉｊｉｅ；ＬｉｕＪｉｈｕａａｎｄＹａｏＤｅ（ＲｅｃｅｉｖｅｄＦｅｂｒｕａｒｙ１，１９９４；ａｃｃｅｐｔｅｄＭａｙ...  相似文献   

A three-dimensional ocean general circulation model for mesoscale eddies——Ⅱ Diagnostic analysis     

Wang Ji  Moto Ikeda 《海洋学报(英文版)》1997,16(1):29-43

A three-dimensional density field associated with mesoscaie unstable waves generated by the 3-D, primitive-equation model (Wang and Ikeda, 1996) is provided to the quasi-geostrophic pressure tendency and ω-equations, and to the (ageostrophic) Q-vector equation. Diagnostic analyses, analogous to the approaches in meteorology: ω-equation and Q-vector method, are for the first time developed to examine the mesoscaie dynamical processes and mechanisms of the unstable waves propagating in the mid-latitude ocean. The weaknesses and strengths of these two diagnostic approaches are evaluated and compared to the model results. The Q-vector method is then recommended to diagnose the vertical motion associated with the mesoscaie dynamics from a hydrographic CTD (conductivity-temperature-depth) array, while the quasi-geostrophic equations produce some small-scale features (errors) in the diagnosed fields.  相似文献   

凤眼莲根对东海原甲藻生长的抑制作用及机制研究   总被引：8，自引：0，他引：8  

刘洁生  杨维东  陈芝兰 《热带海洋学报》2007,26(3):43-47

观察凤眼莲Eichhornia crassipes根粉末及丙酮提取物对东海原甲藻Prorocentrum donghaiense生长的影响,比较分析根系丙酮提取物中的化学成分以及不同成分抑藻效果,探讨凤眼莲根对藻类生长的抑制作用及其化学基础。结果显示,1.5g.L-1以上的凤眼莲根粉末可完全抑制东海原甲藻的生长。实际浓度0.019g.L-1的凤眼莲根丙酮提取物对东海原甲藻可产生50%的抑制率。N-苯基-2-萘胺浓度为1mg.L-1时,第6天对东海原甲藻的抑制率超过60%。浓度50μl.L-1时,亚油酸对东海原甲藻的抑制率超过80%。气相色谱-质谱联用(GC-MS)或高效液相色谱(HPLC)检测显示,凤眼莲根丙酮提取物中含有一定量的亚油酸和N-苯基-2-萘胺,同时还有大量的长链脂肪酸如十六酸、9-十六碳烯酸等。结果表明,凤眼莲根可显著抑制东海原甲藻的生长,N-苯基-2-萘胺、亚油酸可能是凤眼莲根抑藻的主要因子。  相似文献   

中国对虾血细胞及其免疫研究   总被引：54，自引：0，他引：54  

李光友  王青 《海洋与湖沼》1995,26(6):591-597

于１９９１年３月－１９９２年４月青岛近海及一养虾场捕集中国对虾亲虾和越冬亲虾，以扫描电镜和透射电镜观察中国虾的血细胞形态及其亚显微结构；研究定量测定细胞吞噬活性的方法。结果表明，中国对虾血细胞分３种：无颗粒细胞，呈球形或梭形，胞质不含颗粒粒；小颗粒细胞及颗粒细胞，卵球形或椭球球形，胞质含有电子致密颗粒，颗粒可分均匀、非均匀的；小颗粒细胞质富含线粒体，可能与它对异物敏感易发生胞吐作用有关，该细胞是识  相似文献   

Studies on marine nanodiatoms in Fujian coastal waters of China in winter     

Liu Shicheng  Gao Yahui  Cheng Zhaodi 《海洋学报(英文版)》1995,14(2):261-268

ＳｔｕｄｉｅｓｏｎｍａｒｉｎｅｎａｎｏｄｉａｔｏｍｓｉｎＦｕｊｉａｎｃｏａｓｔａｌｗａｔｅｒｓｏｆＣｈｉｎａｉｎｗｉｎｔｅｒ￥ＬｉｕＳｈｉｃｈｅｎｇ；ＧａｏＹａｈｕｉａｎｄＣｈｅｎｇＺｈａｏｄｉ（ＲｅｃｅｉｖｅｄＤｅｃｅｍｂｅｒ２２，１９９４；ａｃｃ...  相似文献   

西太平洋暖池区热带波动的天气效应     

常美桂  王衍明 《海洋与湖沼》1995,26(S1):40-46

为了探讨西太平洋暧地区热带波动的天气效应，利用1980年2－9月140°E日本静止卫星纬度时间剖面卫星云图，分析了5d和14d左右周期热带波动云的演变特征，井综合分析了14d周期的云系演变型式与流场的关系，为预报热带中期天气变化规律提供了依据；热带波动中30－60d大气低频振荡的云量变化最显著，北半球夏半年热带波动的天气压主要在10°N－0°，各半年在10°N－10°S，超过这个区域热带云量的港分布型式就有明显的变化。  相似文献   

Study on the characteristics of the marine boundary layer in the Equatorial Pacific     

Zhang Ziyu  Zhou Mingyu 《海洋学报(英文版)》1994,13(2):225-236

ＳｔｕｄｙｏｎｔｈｅｃｈａｒａｃｔｅｒｉｓｔｉｃｓｏｆｔｈｅｍａｒｉｎｅｂｏｕｎｄａｒｙｌａｙｅｒｉｎｔｈｅＥｑｕａｔｏｒｉａｌＰａｃｉｆｉｃ￥ＺｈａｎｇＺｉｙｕａｎｄＺｈｏｕＭｉｎｇｙｕ（ＲｅｃｅｉｖｅｄＡｕｇｕｓｔ２１，１９９３；ａｃｃｅｐｔｅｄ...  相似文献   

Effects of Copper and pH on Larval Attachment of Barnacle Balanus reticulatus Utinomi     

梁志  庞景梁  孙恢 《海洋学报(英文版)》1984,3(2):300-300

The present note deals with the effects of seawater with different copper concentrations and pH values on the larvae of the barnacle Balanus reticulatus Utinomi. The results show that the higher the copper concentration and the lower the pH value in the seawater, and the more acute the toxicity. In the natural seawater of pH 8.1 the effective concentration EC_(50), i.e. the copper concentration causing 50%. larvae fail to attach, is approx-  相似文献   

Design of Mooring System for Oil Storage Vessels     

LI  Wen-long 《中国海洋工程》2003,17(4):541-550

The floating oil storage system has been proposed as a new facility for Strategic Petroleum Reserve (SPR) in China. Mooring is one of the key technologies to ensure the safety, reliability, and performance of the oil storage system. This paper describes the concept, analysis, design and reliability of the mooring system. For mooring system design of these oil vessels, analysis is essential of the behavior of the vessel in connection with mooring facilities of nonlinear resilience. A nonlinear mathematical model for analyzing a moored vessel is established and solved. Some results of numerical simulations are presented. Assessment of the safety regarding the mooring system in terms of failure probability is carried out. Another simulation model for calculating the failure probability of the mooring system is proposed. The design parameters that have an influence on the characteristics of the failure probability have been identified. The simulation results show that the mooring system has an annual reliab  相似文献