Geology and Stable Isotope Geochemistry of the Dadonggou Pb-Zn Ore Deposit, Altay, Xinjiang, NW China     

LIU Min  ZHANG Zuoheng  WANG Yongqiang  GUO Xuji 《地质学报》2008,82(11)

  相似文献   

文昌鱼哈氏窝匀浆使蟾蜍足细胞释精的超微结构研究     

方永强  王龙 《台湾海峡》1991,(1)

本文报道了文昌鱼哈氏窝匀浆刺激蟾蜍足细胞释放精子过程所发生的超微结构变化,进一步证实这种匀浆含有类似脊椎动物促黄体生成素活性物质。  相似文献   

Studies on ultrastructure of oocyte in process of maturing in pen shell     

Fang Yongqiang  Qi Xiang 《海洋学报(英文版)》1988,7(3):459-472

The present paper deals with the ultrastructural changes of oocyte in the process of maturing in pen shell Atrinapectinata Linne. When it develops from the antecedent growth period to the accelerating growth period the annulate lamellae emerge, the RER better develop, the yolk granules with single and double layer membrane and are visible. In the well-developed mitochondria there is yolk stored. The Golgi vacuoles are brewing yolk granules. At the mature period the annulate lamellae and the Golgi bodies disappear, and there are only a few RER and mitochondria with poor cristae in the cytoplasm. All these might be well used for judging the maturity of the ootids in the process of the artificial propagation.  相似文献   

卵形鲳鲹早期卵子发生显微及超微结构的研究   总被引：4，自引：1，他引：4  

方永强  戴燕玉  洪桂英 《台湾海峡》1996,(4)

本文研究了卵形鲳鲹早期卵子发生的显微与超微结构特点。研究结果表明在1～2龄鱼卵巢中卵原细胞进入首次成熟分裂前期的结构特点，3～4龄鱼才开始进入小生长期，文中讨论了此鱼性腺成熟的年龄以及如何加速性腺发育，为人工繁殖提供科学依据。  相似文献   

不同水温对文昌鱼性腺发育的影响   总被引：10，自引：1，他引：10  

林加涵  方永强 《台湾海峡》1996,15(2):170-173,T001

研究表明，不同水温对文昌鱼性腺发育分化和成熟有十分显著的影响。１４℃对文昌鱼性腺发育没有显著的作用，２０和２５℃十分有利于性腺发育和成熟，经４０ｄ培养，出现一些雌、雄文昌鱼产卵和释精以及加速性腺发育。本文还讨论了水温促进性腺发育可能的机制。  相似文献   

Holocene strata along the coastal area of eastern Guangdong     

Li Pingri  Huang Zhenguo  Zhang Zhongying  Zong Yongqiang 《海洋学报(英文版)》1988,7(1):104-114

The data of about 1700 drill holes are correlated, of which 47 drill sections are discussed comprehensively for chronology and sedimentology, and the characteristics and changes of sporo-pollen are analysed. The authors consider that the Holocene strata along the coast of eastern Guangdong can be divided into five formations. The Holocene began 12 000 years ago; the fluvial facies gravel, the striped weathered clay and the "old red sand" serves as the boundary between the Holocene and the Pleistocene.  相似文献   

对虾体内氯霉素含量测定方法的研究   总被引：1，自引：0，他引：1  

李兰生  王勇强 《中国海洋大学学报(自然科学版)》1995,(3)

应用ＨＰＬＣ技术建立常用药物氯霉素的虾体动力学研究方法。该方法的特点是：与微生物法、比色法、气相色谱法、荧光法及免疫法比较．测试准确、快速且灵敏度高。应用该方法可以从虾体内的血液、肌肉、肝胰脏、肠胃中分离出被虾吸收的氯霉素，并定量测定。在１—５０μｇ／ｍｌ范围内线性关系相关系数为０．９９９５。  相似文献   

河南理工大学校园导航系统的设计与实现     

文广超  邓寅生  余永强  谢俊  严明波 《测绘信息与工程》2008,33(2):38-40

利用了SuperMap Objects组件,构建了C/S模式的河南理工大学校园导航系统,实现了信息查询、路径导航、办事指南、地图与数据编辑、数据输出、用户管理及三维虚拟校园导航等功能,并提供了与现有校园系统集成的接口.  相似文献   

The distribution and geological significance of carbazole compounds in Silurian paleo-pools of the Tarim Basin,Northwest China     

LIU Luofu HUO Hong GUO Yongqiang CHEN Lixin LI Shuangwen ZHAO Yande LI Yan WANG Ping CHEN Zhijun 《中国地球化学学报》2008,27(1):1-8

The results presented in this paper indicated that the carbazole-type compounds have high thermal stability and also show stability in oxidation and bio-degradation. This kind of compounds still has high concentrations and a complete distribution in the analyzed dry asphalt samples, showing that they are particularly useful in the study of hydrocarbon migration of the paleo-pools. The difference in the contents of nitrogen compounds in the Silurian dry asphalts from the Awati, Tabei and Tazhong areas is attributed to the difference in the extent of oxidation and （or） bio-degradation for the areas; the Awati and Tabei areas underwent relatively strong oxidation and bio-degradation. During the first stage of hydrocarbon pool formation in the Silurian system in the Tazhong and Tabei areas of the Tarim Basin （at the end of the Silurian period） and at the second stage in the Awati area （in Permian）, the hydrocarbons experienced a long-distance migration.  相似文献   

Petroleum Migration Direction of the Silurian Paleo-pools in the Tarim Basin, Northwest China   总被引：1，自引：0，他引：1  

LIU Luofu  ZHAO Ye  HUO Hong  CHEN Lixin  CHEN Yuanzhuang  ZHAO Suping  LI Chao  LI Shuangwen  GUO Yongqiang  LI Yan 《《地质学报》英文版》2008,82(1):174-183

The results obtained in this paper indicate that carbazole-type compounds have high thermal stability and also show stability in oxidation and bio-degradation. This kind of compounds still has a high concentration and complete distribution in the analyzed dry asphalt samples, showing that they are particularly useful in studying petroleum migration of paleo-pool. During the basin＇s first-stage of oil-gas pool formation in the Silurian in Tazhong and Tabei areas of Tarim Basin （at the end of Silurian period） and the second-stage in the Awati area （in Permian）, the petroleum experienced a long-distance migration. During the formation of the Silurian paleo-pools in Tazhong Uplift at the end of Silurian, the petroleum mainly came from the lower and middle Cambrian source rocks in the Manjiaer sag. The petroleum migrated towards the southwest-south entering the Silurian reservoir beds in Tazhong first. Then, it further migrated within Silurian from northwest to southeast along the highs of the Structural Belts to the region of the Silurian pinchout boundary in Tazhong. In Tabei Uplift, during the first-stage of pool formation, the petroleum was also from the lower and middle Cambrian source rocks in the Manjiaer sag. It migrated northwest entering the Silurian reservoir beds in the Tabei Uplift firstly, and then the migration continued in the same direction within the Silurian reservoirs and finally the petroleum was trapped in higher positions. During the second-stage pool formation in the Silurian beds in the areas around Awati sag, the petroleum mainly came from the lower-middle Cambrian source rocks in the Awati sag. The petroleum migrated from the generation center to Silurian reservoirs in all directions around the sag through major paths, and the petroleum was finally trapped in higher locations.  相似文献