甲烷水合物生成和分解的X射线断层扫描试验研究   总被引：4，自引：0，他引：4  

吴青柏  蒲毅彬  蒋观利  邓友生  邢丽丽  冯小太 《冰川冻土》2006,28(1):122-125

通过X-射线断层扫描系统(CT)开展甲烷水合物生成和分解试验研究,结果表明:CT可以清楚地描述甲烷水合物形成和分解过程.通过生成和分解的密度图像变化和CT数频率分布以及均方差变化,能够较好地理解甲烷水合物的生成和分解过程变化,同时CT数在生成和分解过程中的变化有助于准确地判断甲烷水合物的生成和分解的相平衡条件.  相似文献   

白刺参，浅青刺参，深青刺参和紫刺参色素组成及黑色素含量的比较分析   总被引：1，自引：0，他引：1  

邢丽丽  孙丽娜  刘石林  李晓妮  缪婷  张立斌  杨红生 《海洋学报(英文版)》2017,36(12):45-51

Sea cucumber, Apostichopus japonicus(Selenka), is a commercially important marine species in China. Among the differently colored varieties sold in China, white and purple sea cucumbers have the greatest appeal to consumers. Identification of the pigments that may contribute to the formation of different color morphs of sea cucumbers will provide a scientific basis for improving the cultivability of desirable color morphs. In this study,sea cucumbers were divided into four categories according to their body color: white, light green, dark green, and purple. The pigment composition and contents in the four groups were analyzed by high performance liquid chromatography(HPLC). The results show that the pigment contents differed significantly among the white, lightgreen, dark-green, and purple sea cucumbers, and there were fewer types of pigments in white sea cucumber than in the other color morphs. The only pigments detected in white sea cucumbers were guanine and pteroic acid.Guanine and pteroic acid are structural colors, and they were also detected in light-green, dark-green, and purple sea cucumbers. Every pigment detected, except for pteroic acid, was present at a higher concentration in purple morphs than in the other color morphs. The biological color pigments melanin, astaxanthin, β-carotene, and lutein were detected in light-green, dark-green, and purple sea cucumbers. While progesterone and lycopene,which are also biological color pigments, were not detected in any of the color morphs. Melanin was the major pigment contributing to body color, and its concentration increased with deepening color of the sea cucumber body. Transmission electron microscopy analyses revealed that white sea cucumbers had the fewest epidermal melanocytes in the body wall, and their melanocytes contained fewer melanosomes as well as non-pigmented pre-melanosomes. Sea cucumbers with deeper body colors contained more melanin granules. In the body wall of dark-green and purple sea cucumbers, melanin granules were secreted out of the cell. The results of this study provide evidence for the main factors responsible for differences in coloration among white, light-green, darkgreen, and purple sea cucumbers, and also provide the foundation for further research on the formation of body color in sea cucumber, A. japonicus.  相似文献   

我国刺参种业态势分析与技术创新展望   总被引：1，自引：0，他引：1  

杨红生  孙景春  茹小尚  张灿影  邢丽丽  孙丽娜  林承刚  刘石林  张立斌 《海洋科学》2020,44(7):2-9

刺参为我国重要的海水养殖对象，而种业是刺参产业链条健康发展的基础环节，但仍存在野生种质资源匮乏、良种不足及良种覆盖率低的现状。本文综述了当前我国刺参种业现状与态势，重点比较分析了“东科1号”等6个已育成良种的特点，提出了在全球气候变化现状下未来刺参种业的发展趋势，并针对刺参产业发展需求，提出了应用现代遗传技术实现性状精准高效选育等未来刺参育种技术体系创新发展方向，以期为我国刺参种业转型升级提供参考。  相似文献   

地震和风耦合作用下上海中心大厦结构易损性研究          下载免费PDF全文

周颖  单慧伟  邢丽丽  赵雪莲 《世界地震工程》2020,(2):001-11

随着城市人口的增加,越来越多的超高层建筑在中国各大城市涌现,在其全寿命周期内不可避免的会遭受风甚至地震等多灾害的作用。以上海中心大厦为分析模型,根据其场地条件,采用Benowitez在2015年提出的1种基于随机波的模型方法模拟不同高度处具有空间相关性的脉动风荷载时程。通过对Perform 3D有限元软件建立的上海中心大厦模型进行非线性动力时程分析,研究地震和风耦合作用下对于结构性能的影响,并基于多灾害需求生成结构在地震和风耦合作用下的易损性曲面来研究结构的抗振可靠度。结果表明:结构的响应和易损性随着风速和PGA的增大而显著增大;随着风速的增大结构的响应和易损性均有增大的趋势,但随着地震动的增大,风荷载对结构响应和易损性影响逐步减小。  相似文献