Proteorhodopsin——A new path for biological utilization of light energy in the sea

The sea is the cradle of photosynthesis on the Earth. Bio-utilization of light in the sea is usually thought to be carried out by light-harvesting pigments, such as normal chlorophyll, divinyl chlorophyll and bacterial chlorophyll, which exist correspondi…     

Stratigraphy and paleontology of the marine Jurrassic strata in Vietnam

Marine Jurassic strata in Vietnam have yielded characteristic ammonites and occur in: (1) west Quang Binh Province located in the eastern margin of the Nam Theun Basin (the main part of which is located in Middle Laos); (2) the Nong Son Basin situated in the north of the Kon Tum Geoblock; (3) the Da Lat Basin, the largest Jurassic basin in Vietnam, extending from the southern margin of the Kon Tum Geoblock to southeast of Ho Chi Minh City. In the first two, Lower Jurassic marine beds occupy the lower part of the section and grade up into Middle Jurassic red beds. In central Da Lat Basin the section consists completely of marine strata containing many ammonite levels dated from Early Sinemurian to Bajocian, whereas the marginal basin section is like the first two areas. Based particularly on biostratigraphical evidence, a marine transgression is considered to have entered the Indochina Block as early as the Late Hettangian. During the early transgression the fauna was distinctly endemic, showing the separate character of the basins, but since the Late Sinemurian, communication between the Da Lat and other basins was established; the marine regime in Da Lat Basin ended around the Late Bathonian.     

《联合国海洋法公约》生效以来对我国海洋地理教育的影响

《联合国海洋法公约》对中国的生效，对我国的海洋地理教育产生了深远影响。主要表现为：在地理教育内容上应对国家领土主权的概念重新定位，改革现行地理教材；使国防安全教育有了更准确的空间范围指向；将影响我国海洋法制进程；对海洋资源可利用的范围有了新的界定；使受教育群体多样化；对地理人才的培养目标和地理教育工作者提出了更高的要求。     

邻苯二甲醛柱前衍生法测定海洋胶体中的水解氨基酸

用邻苯二甲醛(OPA)柱前衍生反相高效液相色谱法测定了厦门湾南部海域海洋胶体中氨基酸的组成和含量.该法的空白值为0～1.8×10-3μmol/L,检出限为2×10-3～9×10-3μmol/L,添加脲的回收率在99.5%～99.7%之间,相对偏差为3.4%～10.7%.结果表明,该海洋胶体中含有16种氨基酸,总量为150.83 μmol/L,其中赖氨酸是含量最多的氨基酸,浓度为35.59 μmol/L,占总水解氨基酸的23.6%.其次是天冬氨酸、谷氨酸、组氨酸、甘氨酸 苏氨酸、甲硫氨酸和亮氨酸,它们的含量相当,浓度分别为12.40、10.48、17.77、16.60、17.22和15.88 μmol/L,分别占总水解氨基酸的8.2%、7.0%、11.8%、11.0%、11.4%和10.5%.这8种氨基酸占了胶体中总水解氨基酸的83.5%,其余8种氨基酸只占16.5%.     

灰色关联分析用于近海水污染区域性特征研究

针对我国近海水污染特征难于辨析的问题,应用灰色系统理论和统计学的方法,提出了一种新的基于环境监测数据的近海水污染区域性特征的分析方法．以天津市近岸海域为例,对近海水环境监测点进行关联分析,计算监潮点之间的B型关联度,并建立了关联度矩阵和关联度排序矩阵；根据上述矩阵中的信息,采用k-means方法对监测点进行聚类,将研究海域内的监测点按照不同的陆源影响分成3个污染特征区域．应用研究表明,该方法原理简单,实用性强,非常有利于环境管理．     

"船-泵-机"匹配方法研究

为了提高舰船喷水推进系统的性能,分析了“船-泵-机”匹配方法。以螺旋桨推进为例,介绍“船-桨-机”匹配的目的、思路、步骤和方法。着重研究“船-泵-机”匹配的特殊性以及相应的方法。以某喷水推进船为例,运用上述方法进行喷水推进系统性能分析,指出了喷水推进与螺旋桨推进在推进性能方面最显著的差别之一,即最薄弱环节由“柴油机-螺旋桨”推进系统中的主机变成了“柴油机-喷泵”推进系统中的喷泵。     

南中国海红树林海洋真菌2492号次级代谢产物研究

研究了来自香港海红树林Phragmites australi的海洋真菌2492号的次级代谢产物.用乙酸乙酯对该菌的培养液进行了液-液萃取,用硅胶柱层析法对提取物进行分离纯化,并用IR,MS,UV NMR波谱法推导确定了单离到化合物的结构.结果在发酵液中分离纯化得到4个有生物活性的生物胺,分别是Hypoxylin A(2),Hypoxylin B(1),N-乙酰酪胺(3)和2492-1(4).     

一株海洋真菌Trichoderma sp.Q98合成产物分析

海洋真菌Trichoderma sp.Q98菌株有4个新颖特征:菌丝产生天然红色素;菌丝产生饱和脂肪酸(1.44% 14:0;17.52% 16:0)及不饱和脂肪酸(2.9% 16:1 (△9),39.16% 18:2 (△8,11),37.12% 18:3 (△9,12,15));培养液含有2组多肽类物质(毛细管电泳迁移时间分别为5.2 min和10.6 min);培养液原液对多重耐药性菌株EN(3)23(Ap r, Cm r, Sm r, Tet r, Ery r)具有强烈抑制作用.     

Killing of Invasive Species of Ship’s Ballast Water in 20t/h System Using Hydroxyl Radicals

A pilot-scale experiment of 20t/h for the treatment of ships ballast water was done in this paper. With the method of strong ionization discharge of dielectric barrier, O₂ in air and H₂O at gas state are ionized and dissociated into large numbers of OH radicals, and then dissolved into a part of ballast water to form dissolved OH with the concentration of 24.3 mg/L. When the dissolved OH concentration is 0.63 mg/L, the kill efficiencies of bacteria, mono-algae, protozoan reached 100% within 2.67 s. The contents of chl-a, chl-b, chl-c and carotenoid were decreased to 35–64% within 8.0 s and not be tested after 5 min. At the same time, the ballast water quality was greatly improved. Therefore, the treatment of ships ballast water using OH radicals is a kind of advanced oxidation technology, which is considered as zero pollution, zero emission and zero residual in the process of the production, of OH radicals and the treatment of ballast water.Key Project of National Foundation Research from Science and Technology Ministry of China, (2002CCC00900). Key and General Projects of National Natural Science Foundation of China (NSFC: 60031001, 60371035).     

航海与海上保险

主要探讨航海与海上保险的关系，阐明海上保险业是伴随航海的发展、频率的海上商业活动而混合产生。文中着重于海上保险业的起源，海上保险制度，我国保险制度的沿革、我国的海上保险和我国航海业与海上保险业的共存发展等内容的探讨。