连云港的巨变

连云港地处江苏省的东北部,著名的海州湾畔,是横贯中国的陇海铁路的东端起点。港口背依云台山,面临东西连岛,这里气候温和,雨量充沛,冬无严寒,夏无酷暑,四季分明,风景秀丽,是终年不冻的优良港湾。该港始建于1933年,解放前夕,由于战争摧残,造成码头倒塌,航道淤塞,濒于瘫痪。解放后,虽经修复、改造、扩建,直到1972年,也仍然是只有三五千吨级的中型泊位的小港。连云港大规模的改造和扩建,是从1973年开始的,当时周恩来总理发出“三     

对海南省开发建设的点滴建议

海南省的开发建设是在深圳等特区和沿海城市开放的经验基础上进行的,有更多的借鉴和比较。然而,海南是新建省级的更加开放的特区,地域宽广,涉及内容多,影响面大,具有很大的特殊性,不能照搬任何地区的经验。海南省需要通过全省人民艰苦创业,充分发挥自身的优势,克服劣势,并要因地制宜,引进技术、资金和人才,实时立体宏观管理,而不是靠花国家钱,走着看。实行多方位经营,只要不损害国家主权、人     

盐城海岸带表层土壤重金属的空间分布及其影响因素研究

以盐城海岸带为研究对象,分析了Cr,Cu,Fe,Mn,Ni,V,Zn,Co,Cd 9种重金属元素在二维空间分布的异质性,以及沿着经纬度方向的梯度变化,并通过主成分分析和元素区域背景值的分析,探讨重金属元素的可能来源.结果表明:自陆向海存在着逐渐减少的格局梯度,而在区域的北部分布着重金属元素的峰值;二维分析的结果表明,重...     

有些路,没走过,将是一辈子的遗憾。

正有一种旅行,叫做骑行,一架单车,一个背包,跨上后座,就能够随着梦想走很远。说走就走的旅行没那么难以实现,骑行就是一种最好的选择。骑行是健康的,单车与背包,简单而又环保;骑行也是美丽的,潮涨潮落,花谢花开,尽在路途中。有人觉得,骑行是寂寞的。一个人的旅行,带着寂寞的心上路,与宁静的大自然相伴,心中充满平静和安宁。     

缢蛏微卫星序列分离及特性分析

分析了缢蛏(Sinonovacula constricta)基因组文库中微卫星序列的特性及微卫星引物的遗传特征.采用磁珠富集珐和PCR 筛选法,以CA15为探针,快速分离含有微卫星序列的阳性克隆.结果表明,在筛选的210个白色菌落中,得到58个微卫星序列,阳性克隆率为27.6%,核心重复序列为两碱基和三碱基的微卫星居多,其中完美型占39.7%,非完美型39.7%,复合型占10.3%,非完美型与复合型共存的占10.3%.微卫星重复次数主要集中在20～40次之间,占66%,最高为63次.除探针中使用的CA重复单元外,还观察到AG/TC,AT/TA,AAC/TTG,CAA/GTT,TGA,AAT,AGAA,GTTT/CAAA,AAAT/TTTA,TTTC,CCTA,TCTA,TCCC,TGCC,GTTTCT,CTGTT,CACACC,TATACA,TTTTG的重复序列.利用Primer Premier5.0设计引物24对,经过初步筛选得到适合的微卫星引物18对,为今后未知微卫星标记的开发,群体遗传结构的分析,优良品种的选育提供基础.     

都道燕窝珍品美 谁知金丝吐血丝——泰南漫游散记

普吉岛位于泰国南部,面积仅有54.3平方千米,是全国最小的府,却是最大的岛之一。那里有风光旖旎的热带海滨浴场,蔚蓝的天空,金黄的沙滩,起伏的海浪,在海天相接的地方,点点风帆时隐时现,勾勒出一幅迷人的优美画卷,是闻名于世的休闲避暑胜地。从普吉岛东面出海,便来到了有“海上桂林”之     

基于精气神理论探析心与神明的关系

精气神理论是构成中医学的基石,心是主宰人体生命活动的重要器官,而心与神明的关系,随着时代的进步,二者关联逐渐模糊,通过对精气神理论的还原,能够进一步阐述心与神明的关系。对于古人而言,神的本义是关于可观测到但却无法解释其来源现象的内在运转原理的集合体,古人从观测自然、人体之神得到了水地学说,发展到精气学说,再发展到精气神理论,精是组成人体生命的物质基础,气是精实现变化转归的动力,神是精气功能的终极体现,而心在体主血、主脉,血脉恰恰是精气输布流转的具象化表现,因此,从精气神运转的角度来看,心与神明之间存在着必然联系。     

章鱼复仇记

在牙买加近海,到处可见美丽的珊瑚礁。海底岩石上,布满了海贝,彩色的鹦鹉螺不紧不慢地蠕动,多种游鱼编织着流动的锦缎,一切都美极了。当然,珊瑚礁中有着一些危险的隐蔽岩洞,洞里会突然伸出一条柔软的触须,把游鱼或其它的海洋生物卷进去,吃得连骨头也不剩——那里住着的,是面目丑陋的章鱼。贩毒头子麦克过惯了花天酒地的生活,为了寻求危险又恐怖的刺激,为了发泄心头之恨,花重金买了一条章鱼,取名为罗恩。据说,曾有一个叫罗恩的女人欺     

海上反偷渡

来自北京的紧急通报1997年12月6日。夜,已经很深,呼啸的北风,越刮越猛,依旧像脱缰野马,在伸手不见五指的茫茫大海,狂奔着、席卷着。“叮铃铃……”清脆的电话铃响起,坐在桌前的值班警官,麻利地拿起听筒,一边仔细听着,一边认真记着。虽未讲话,但从他脸部表情的变化,可以断定情况紧急,而且十分严重。刚才的电话,是从济南打来     

菲律宾海钱洲深海峡谷沉积物中元素的地球化学特征

作者研究了钱洲深海峡谷柱状沉积物中常量元素和微量元素的垂直分布及它们的相关关系。研究表明,大多数化学元素随岩芯深度的垂直分布变化不大,且元素明显的分为两组：Ca,Sr组和Al,Fe,Ti,Mg,Ni,V,Co,Li,Rb组,该区的物质来源为多源的,即生物来源、陆源和火山源。     

Size-fractionated uranium isotopes in surface waters in the Jiulong Estuary in China

Surface water was collected from the Jiulong Estuary for determination of activity concentrations of uranium isotopes in different size fractions, namely, greater than 53, 10 -53, 2 - 10, 0.4 -2 μm, 10 000 u -0.4 μm and less than 10 000 u fractions by microfihration and cross-flow uhrafiltration technologies. Results indicated that most of the dissolved uranium （ 〈 0.4 μm） exis- ted in the low molecular mass fraction （ 〈 10 000 u）, and the colloidal uranium-238 （10 000 u -0.4 μm） only contributed less than 1% of the dissolved uranium-238. The fractions of colloidal uranium in the dissolved phases decreased with the increasing sa- linity. A positive linear relationship between uranium-238 activities and salinities was observed for the dissolved, colloidal and low molecular mass fractions, indicating a conservative behavior of uranium in the Jiulong Estuary. In the particulate phases （ 〉 0.4 μm）, the partitioning of uranium isotopes among different size fractions was controlled by the partitioning of particle concentrations. In the regions with salinities below 20, the partitioning of uranium-238 among different size fractions was as follows： 10 - 53 μm 〉 2 - 10 μm 〉 0.4 - 2 μm greater than above 53 μm. However, the order at the offshore station with salinities above 30 changed as follows ： 0.4 - 2 μm 〉 10 - 53 μm 〉 2 - 10 μm greater than above 53 μm. The fraction of the 0.4 - 2 μm particles increased at the offshore station, suggesting the increased contribution of the authigenic uranium. The activity ratio of uranium-234 to uranium-238 in the dissolved phases, including the low molecular mass fraction and the colloidal fraction, was larger than unity, showing the occurrence of excess uranium-234. In contrast, the activity ratio of uranium-234 to uranium-238 in all size fractions of the particulate phase was close to the equilibrium value （1.0）. The observed different values of the activity ratio of uranium-234 to uranium-238 in the dissolved phase and the partic     

夏季珠江口沉积物中营养盐剖面分布和界面交换通量

通过对夏季珠江口区域沉积物间隙水营养盐剖面分析,调查了营养盐含量分布和特征,探讨了有机物的降解特性、营养盐的底部通量估算和作用.结果表明,珠江口沉积物间隙水中营养盐以高含量铵盐为主要的存在形式,沉积物中有机物的降解反应主要在厌氧状态下进行,底部水体铵盐的增加来源于底部沉积物有机质的降解释放,而且对水体的营养盐循环有较大的贡献.     

Recent progress in submarine geosciences in China

In China submarine geosciences represents a newly established discipline of oceanography, focusing on the oceanic lithosphere, and its interface with the hydrosphere and biosphere. Recently, supported by the National High Technology Research and Development Program and other high-tech development projects, significant progress has been made in the development of advanced technologies and equipment. This en- ables the scientists in China to carry out explorations of the international seabed area in the Pacific Ocean and on the Southwest Indian Ridge. In addition, they have been active in the research activities associated the mid-ocean ridges and western Pacific marginal seas. It is anticipated that this research field will continue to be highly fruitful in the near future.     

湄洲湾夏季的初级生产力

湄洲湾１９９２年夏季的叶绿素ａ，三磷酸腺苷，碳比积累速率，初级生产力的变化范围和均值分别为０．４５－４．７２，１．４９ｍｇ／ｍ＾３；０．１２－１．０７，０．３１μｇ／ｄｍ＾３；０．０６－０．５８，０．３４ｄ＾－１；０．０７－０．３４，０．２１ｍ／（ｍ＾２．ｄ）。叶绿素ａ与三磷酸腺苷之间。初级生产力与碳比积累速率之间均呈正相关关系。叶绿素ａ三磷本能腺苷的比值为４．８，湄洲湾夏季浮游植物的生长受氮不足     

Challenges in cross-sectoral marine protection in Europe

Marine environment protection in Europe faces a number of challenges. One is the coordination of relevant sectoral policies — such as agricultural and fisheries policies — with regard to marine protection objectives. The question in the following is on how marine protection issues can be more closely integrated in sectoral policies under the conditions prevailing at present. In particular the strength and weaknesses of the Marine Strategy Framework Directive (MSFD) as the key instrument for marine environment protection in Europe are analyzed in this context. In particular, the MSFD does not adequately address all sectors and policies which are relevant to marine environment protection. One possible means of giving the MSFD greater influences on other policies of relevance to marine waters is to integrate the objectives established under the MSFD in the European maritime policy. The aim should be to require the further development of sectoral policies to take unrestricted account of the objectives of the MSFD implementation process. But also other instruments of marine policy such as maritime spatial planning and marine protected areas are crucial to advance the protection of European seas.     

Recent advances in marine technology in Canada

Much of the recent Canadian activity in marine technology has focused on development of capabilities in Arctic waters, and on the update and replacement of naval vessels. This paper describes some of the significant projects and programs now under way, and suggests future research and development requirements.     

一氧化氮在浮游植物中的研究进展

对一氧化氮在浮游植物中的研究进展进行了归纳,总结了一氧化氮对浮游植物生长的影响,探讨了浮游植物中一氧化氮的产生机制,并对今后的研究重点提出展望。     

Seasonality in nutrient concentrations in Galveston Bay

In order to investigate factors controlling nutrient cycling in the shallow and turbid coastal ecosystem of Galveston Bay, data from: (1) the Texas Water Commission (TWC) database 1980–1989, and (2) salinity transects in 1989 and 1993 are presented and analyzed. Statistical regression and time-series analysis were carried out on data acquired by TWC between 1980 and 1989, in an attempt to establish seasonally of nutrient and chlorophyll-a (chl.-a.) concentrations in the bay and to determine factors which regulate these concentrations.A strong seasonality was found for phosphorus and chl.-a. in the upper and mid-bay stations. A recurring maximum for phosphate occurred in September and a chl.-a. maximum occurred regularly in March–April. It is hypothesized that benthic regeneration of phosphorus at the end of summer is responsible for the phosphate maximum. The inverse correlation of the partition coefficient (K_d) for phosphate with the concentration of suspended particulate matter (SPM), coupled to a strong enrichment of phosphate in suspended particles at low SPM concentrations, indicates additional control by geochemical and physical processes such as particle sorting and/or particle-colloid interactions. Nitrate is inversely correlated with salinity at the upper and mid-bay stations, indicating the Trinity River is a major source.Nutrient concentrations in the lower bay (East and West Bay stations) are considerably lower and less predictable, as they are not correlated with salinity or temperature. Data from the 1989 and 1993 transects confirm the yearly maximum in phosphate concentration in late summer months, with peak concentrations in the upper Trinity Bay. It is concluded that despite possible phosphate buffering by physical and geochemical mechanisms, relatively large concentration maxima recur regularly every year during the summer, possibly caused by a benthic source of phosphate.     

中国海洋腹足类分类学研究进展——纪念中国科学院海洋研究所建所70周年

中国科学院海洋研究所建所70年来,在海洋贝类分类学研究领域取得了长足发展与进步,做出一系列开创性研究成果。本文综述了建所以来我所海洋腹足类分类学研究方面的主要进展,概述了取得的主要科研成果,分析了现代腹足类分类学研究的发展趋势以及面临的挑战,并对今后的发展提出了相应对策和建议。