大黄鱼(Pseudosciaena crocea)养殖群体遗传多样性的降低

采用AFLP技术方法,对福建二个野生及二个养殖大黄鱼群体进行了遗传多样性的研究.实验采用7对引物组合,在四个群体的120个个体中共扩增出472个位点,其中多态位点为220个,多态位点比例为46.61%.结果表明,大黄鱼养殖群体的遗传多样性降低:宁德野生群体和湄州野生群体多态位点比例分别为42.42%和45.14%,Nei遗传多样性指数分别为0.1046和0.1245,shannon多样性指数分别为0.1659和0.1942,平均有效等位基因数(Ne)分别为1.4153和1.4428;宁德养殖群体和连江养殖群体多态位点比例分别为40.83%和40.53%,Nei遗传多样性指数分别为0.1027和0.1039,shannon多样性指数分别为0.1615和0.1633,平均有效等位基因数(Ne)分别为1.3919和1.3856.四个群体间遗传距离为0.0359-0.1465,平均为0.079,群体间基因流为1.0808.     

The ground-state entanglement in the spin-XX chain with a magnetization current

The ground-state entanglement in a transverse spin-1/2 XX chain with a magnetization current is studied. By introducing a magnetization current to the system, a quantum phase transition to current-carrying phase may be presented with the variation of the driving field λ for the magnetic field h>1; and the ground-state entanglement arises simultaneously at the critical point of quantum phase transition. In our model, the introduction of magnetization current may result in more entanglement between any two nearest-neighbour spins.     

长江口南港水道潮流特征分析

根据１９９６年长江口南港水道枯、丰水期（１月、７月）大、中、小潮两次各２６ｈ以上的全潮水文实测资料,统计分析了实测流的特征和潮流类型、运动形式、潮流垂直变化、余流、Ｍ２分潮流及分潮流对涨、落潮流不等的影响。     

太阳黑子、厄尔尼诺及西北太平洋热带气旋的活动

本文用１９００～１９９４年的资料，以统计分析的方法，对太阳黑子，厄尔尼诺及西北太平洋热带气旋活动的相互关系，进行了初步探讨，归纳出几点有参考价值的结论     

水样及生物体内微量锌、锰、硒的极谱催化波同时测定

本文提出了在酒石酸盐-乙二胺-高氯酸-亚硫酸钠-高碘酸钾-EDTA体系中同时测定微量锌、锰、硒的极谱催化波，波峰敏锐，波形稳定。Zn2 浓度在0．4～40μg／dm3，Mn2 浓度在1．6～80μg／dm3，Se（Ⅳ）浓度在0．02～3．0μg／dm3范围内浓度与峰电流呈线性关系。取天然水样平行12份测定，变异系数在10％以内。     

Formation and Movement of the ESIW as Modeled by MICOM

The presence of the minimum salinity and oxygen-rich East Sea Intermediate Water (ESIW) off Korean coast has raised many questions about its origin and movement. This study attempts to answer these questions in the context of numerical model. For this, the Miami Isopycnic Coordinate Ocean Model is used with surface and inflow boundary conditions based on available data. Model results show that the ESIW forms most distinctly off Vladivostok, where the center of doming structure is observed, and moves southward along Korean coast forming a large cyclonic gyre around the doming. The renewed ESIW has the character of minimum potential vorticity common to usual mode waters. These results are compatible with various indications made in previous observational and theoretical studies. However, it is not known whether the doming structure is a result of convection or the latter is favored by the former. This revised version was published online in August 2006 with corrections to the Cover Date.     

顺序扫描ICP—AES法测定海洋沉积物中九种主要成分

用ICP—AES法测定海洋沉积物中铝、铁、钙、镁、钠、钾、钦、锰、磷等九种主要成分,方法简便,省时省力,测量精密度小于4％,可以满足海洋地球化学的要求。     

Improved understanding of petroleum migration history in the Hongche fault zone,northwestern Junggar Basin (northwest China): Constrained by vein-calcite fluid inclusions and trace elements

Calcite veins and cements occur widely in Carboniferous and Permian reservoirs of the Hongche fault zone, northwestern Junggar Basin in northwest China. The calcites were investigated by fluid inclusion and trace-element analyses, providing an improved understanding of the petroleum migration history. It is indicated that the Hongche fault behaved as a migration pathway before the Early Cretaceous, allowing two oil charges to migrate into the hanging-wall, fault-core and footwall reservoirs across the fault. Since the Late Cretaceous, the Hongche fault has been sealed. As a consequence, meteoric water flowed down only into the hanging-wall and fault-core reservoirs. The meteoric-water incursion is likely an important cause for degradation of reservoir oils. In contrast, the footwall reservoirs received gas charge (the third hydrocarbon event) following the Late Cretaceous. This helps explain the distribution of petroleum across the fault. This study provides an example of how a fault may evolve as pathway and seal over time, and how reservoir diagenetic minerals can provide clues to complex petroleum migration histories.     

碎冰条件下单点系泊船舶动态响应特性研究

为了研究不同单点系泊位置对极地系泊船舶在来冰角度改变时动态响应的影响,运用离散元方法(DEM),计算了船舶在60%密集度下,冰速为1.0 m/s、冰厚为1 m时不同角度的船冰阻力,结合系泊分析软件二次开发功能,计算分析系泊船舶在不同来冰角度和不同系泊位置下受上述冰情影响下的响应。通过对模拟结果与试验结果的对比,认为离散元方法(DEM)的数值模拟结果与试验结果吻合较好;单点系泊位置为距船头L/4时,系泊船舶能以最快速、最稳定的方式对来冰方向的变化做出响应。