阿拉伯海的扩张历史：某些新的控制条件

根据海台、无震海岭．活动洋中脊以及几条破碎带，可把阿拉伯海划分成几个深海盆地．这些盆地的进化历史已从地球物理的研究中推演出来．东阿拉伯海盆(EAB)位于Laxmi-Laceadive海岭及印度的西部大陆坡之间，被认为其下伏是由裂谷和相关过程形成的过渡地壳，     

印度西南海岸Kannur区红树林沉积物的水动力反应

对Ｋａｎｎｕｒ红树林的地表和岩心沉积物的粒度特征和统计参数做过研究。向陆地带、中间过渡带和浅水剖面的砂、泥含量几乎为常量。地表沉积物平均粒度变化范围在１．８３和５．５６之间,岩心沉积物的变化范围在２．３和５．５６之间。沉积物普遍分选差至极差、...     

南极Scotia海Dove山脉形成的火山作用及其岩石学、地球化学和构造环境

本研究对来自DOVE盆地（Scotia海南部）中部火山山脊的拖网样品进行了详细的岩石学、地球化学分析,辅以K—Ar年代学分析。研究区水深2000～3000m,地理坐标范围为59°21～23′S和42°27～31′w。本研究的目的在于,通过比较研究区火成岩和形成Scotia、Antartic—Phoenix洋中脊及南设得兰群岛的火山岩之间的地球化学特征和同位素特征,厘定研究区岩浆形成的地球动力学背景以及岩浆作用的绝对年龄。     

地中海西北部深海水道：巴伦西亚水道的地貌,地震构造及其环境

地中海西北部深海水道：巴伦西亚水道的地貌、地震构造及其环境Ｂ．Ａｌｏｎｓｏ等巴伦西亚水道位于地中海西北部巴伦西亚海槽的轴部，是一个ＮＥ—ＳＷ向构造凹陷，全长４００ｋｍ。根据海底地貌沉积特征，可把巴伦西亚水道大体划分为上、中、下三段。上段特征为：（１）...     

自然延伸概念及相关地质要素在海域划界中的影响效力分析

The United Nations Convention on the Law of the Sea entitled the coastal States to naturally extend the continental shelf, which has caused more drastic disputes of maritime delimitation. This paper devotes to clarifying the significant concept of natural prolongation through an effect method combing the legal principles and technical analysis. Firstly, the classic samples with respect of the development of geological features are traced. Based on these samples, the classification with a model is proposed in order to affirm the concept''s significance under certain geomorphologic situations. Lastly, scientific analysis is used to present two potential prolongation situations and emphasize that all the technical analysis on maritime delimitation should be complied with international law and protect the common interest of all the mankind.     

美国国家大地测量局的检定基线方案

<正> 50年代早期出现的电子测距仪为测量事业带来了前所未有的速度和精度。然而,伴随此种新的测量方法而俱来的有仪器检定和规格化的过程,因为观测结果受到(变化的)气象状况和必需经常测定的种种仪器误差的影响。为此,对于测量界来说,应有测定仪器性能变化的一种方便和可靠的方法。检定基线则可为广大用户提供检定手段。检定基线(CBL)是精密测定的直线距     

Development of two novel CYP-antibodies and their use in a PCB exposure experiment with Mytilus edulis

In an attempt to learn more about the cytochrome P450 (CYP) system of mussels, we used protein databases and alignment software to extract highly conserved CYP sequences. From these alignments synthetic peptides were produced and used for rabbit immunisation, which yielded polyclonal antibodies against the CYP families 2 and 4. The antibodies were evaluated with Western Blot and ELISA assays, using digestive gland microsomal samples from the mussel Mytilus edulis. Western Blots revealed immunoreactions for both antibodies. The anti-CYP2 sequence rendered one major immunopositive protein of approximately 49 kDa size, and weak signals for proteins of approximately 41 and 56 kDa size. The anti-CYP4 sequence rendered two major bands of approximately 56 and 59 kDa size, and also a weak immunoreaction with a protein of approximately 43 kDa size. ELISA rendered only weak signals even with a 1:50 dilution of IgG-purified serum. A 10-day exposure to Aroclor 1254 did not appear to affect any of the immunopositive proteins, while total PCBs in soft bodies increased from 14-40 ng/g DW in controls to 373-638 ng/g DW in exposed mussels.     

ASCA Observation of the Quiescent X-Ray Counterpart to SGR 1627-41

We present a 2-10 keV ASCA observation of the field around the soft gamma repeater SGR 1627-41. A quiescent X-ray source, whose position is consistent both with that of a recently discovered BeppoSAX X-ray source and with the Interplanetary Network localization for this soft gamma repeater, was detected in this observation. In 2-10 keV X-rays, the spectrum of the X-ray source may be fit equally well by a power-law, blackbody, or bremsstrahlung function, with unabsorbed flux approximately 5x10-12 ergs cm-2 s-1. We do not confirm a continuation of a fading trend in the flux, and we find no evidence for periodicity, both of which were noted in the earlier BeppoSAX observations.     

金刚石钻头性能的测试设备

测试新设计的现有的钻头、是发展钻进技术的基础。虽然现场测试是获得现场数据的唯一途径,但实验室测量可以在很宽范围的工作条件下最经济地获取实验数据。A。Ersoy和M.D Waller的文章,介绍了诺丁汉大学的一种在实验室测试岩石钻头的钻机。设计该钻机的目的是为了对各种不同岩石的众多钻头提供严格的测试平台。该钻机能够提供0－2000r/min的转速,最大4000kg的载荷和200Nm的扭矩。钻进可以在恒定进给或恒定载荷条件下进行。机器构架可以容纳高1m的试件。采用专门设计的软件,所有关键数据都能自动录入计算机,并自动形成报告书。软件可连续显示有效特征参量,如钻进比能量。常用功能还包括对实验室进程中钻头磨损的监控。