栉孔扇贝(Chlamys farreri) 血细胞类型及抗菌力的研究   总被引：1，自引：0，他引：1  

邢婧  战文斌  周丽 《中国海洋大学学报(自然科学版)》2003,33(1):41-46

用2种方法将栉孔扇贝血细胞分为2大类透明细胞、颗粒细胞.吉姆萨染色观察,透明细胞的细胞质中颗粒很少,细胞核圆形,居中,细胞质较少,核质比大;颗粒细胞比透明细胞大且多,染色深,但核质比小,在细胞质中有颗粒,有些颗粒细胞具双核.密度梯度离心结果,透明细胞主要位于上层,颗粒细胞则大部分位于下层.吞噬力、抗菌活力、溶菌活力及活性氧检测结果表明,颗粒细胞均强于透明细胞.  相似文献   

16米风化砂回填地基的深层振密加固     

曹永琅  张光蒲  丛健 《海岸工程》2001,20(4):21-26

结合北方某重力式深水 ( -1 6.0 m)码头沉箱后壁 1 4.5 m范围的回填风化砂经深层振密处理这一工程实例 ,介绍了回填砂振密的技术要求、施工工艺和方法及振密效果的检测。同时对施工与检测中的某些技术问题提出了自己的看法。  相似文献   

Estimation of gillnet and hook selectivity using log-linear models   总被引：5，自引：0，他引：5  

Millar  Russell B.; Holst  Rene 《ICES Journal of Marine Science》1997,54(3):471-477

  相似文献   

脑啡肽对栉孔扇贝血细胞聚集和附贴的影响   总被引：1，自引：0，他引：1  

王娜娜  孙虎山  王宜艳 《海洋科学》2006,30(9):28-30

用质量浓度为2,5和25mg/L的脑啡肽对栉孔扇贝(Chlamysfarreri)血细胞聚集和附贴的影响进行了研究。结果表明质量浓度为2~25mg/L的脑啡肽均抑制血细胞的聚集,并且随着脑啡肽质量浓度的升高,对血细胞聚集的抑制作用加强。2mg/L的脑啡肽促进血细胞的附贴,5mg/L和25mg/L的脑啡肽抑制血细胞的附贴。实验证明脑啡肽对栉孔扇贝的免疫调节有重要作用。  相似文献   

Hematological changes in white spot syndrome virus-infected shrimp, Fenneropenaeus chinensis (Osbeck)     

Shouming Feng  Wenbin Zhan  Jing Xing  Jun Li  Kai Yang  Jing Wang 《中国海洋大学学报(英文版)》2008,7(3):287-293

The pathological changes of hemocytes in the haemolymph and hepatopancreas were examined in experimentally and naturally WSSV (white spot syndrome virus) infected Fenneropenaeus chinensis. The results showed that the pathological manifestations of hemocytes were similar among moribund shrimps infected via injection, feeding and by nature. Firstly, the total hemocyte counts (THCs) in WSSV-infected shrimp were significantly lower than those in healthy shrimp. Secondly, necrotic, broken and disintegrated cells were often observed, and a typical hematolysis was present in the haemolymph smear of WSSV-infected shrimp. Thirdly, necrosis and typical apoptosis of hemocytes were detected with TEM in the peripheral haemolymph of WSSV-infected shrimp. Hyalinocytes and semi-granulocytes with masses of WSSVs in their nuclei often appeared, whereas no granular hemocytes with WSSV were found in the hepatopancreas of moribund infected shrimps. All our results supported that hemocytes were the main target cells of WSSV, and hyalinocytes and semigranular hemocytes seemed to be more favorable for WSSV infection in F. chinensis.  相似文献   

甲壳动物造血机制研究进展          下载免费PDF全文

杨丰  李钫 《应用海洋学学报》2019,38(4):484-489

血细胞是甲壳动物的免疫细胞,可通过吞噬、包囊、结节、黑化,以及分泌免疫活性分子等方式杀死和清除入侵的病原体。活跃的造血机能对更新和补充损耗的循环血细胞、维持一个稳定有效的免疫系统是至关重要的。相对脊椎动物而言,人们对包括甲壳动物在内的无脊椎动物的造血机制了解比较有限。本文总结了近年来在甲壳动物造血机制方面的研究进展,主要介绍了血细胞的类型和功能、造血组织的结构和细胞组成、血细胞的分化途径、造血的调控机制,以及相关的细胞模型和体外实验技术等。并在此基础上分析了已有研究存在的缺陷,提出了需要进一步探究的问题。  相似文献   

中子活化测井在萤石矿勘探中应用效果          下载免费PDF全文

师立谱  徐风曾  王世传 《山东国土资源》1990,(2)

本文简要叙述了中子活化测井原位测定萤石矿(CaF_2)含量的原理及方法技术,以及在两个萤石矿区试生产的成果实例。并着重指出: 1.该方法适用于各种不同类型的萤石矿。选择F作为CaF_2的特征指示元素,在萤石矿无其它元素干扰,方法反映单解。 2.工作证明:该方法可防止由于岩矿心破碎造成的地质取心中漏失的矿体,发现地质工作未确定的薄矿层。并能提供CaF_2含量。 3.在取心率很低的钻孔,提供了真实可靠的CaF_2含量和矿层上下顶板确切位置,避免了钻孔报废、取得了良好的经济效益。最后文章指出:该方法的精度、灵敏度和工作效率完全满足生产工作的需要。  相似文献   

杂色鲍血细胞分类、结构和免疫功能的流式细胞术分析   总被引：2，自引：0，他引：2  

冼健安  钱坤  郭慧  王冬梅  张秀霞  苗玉涛  潘训彬  王安利 《海洋科学》2015,39(12):8-14

应用流式细胞术对杂色鲍(Haliotis diversicolor Reeve)血细胞的分类、结构和免疫功能进行分析。根据细胞前向角散射光(FSC)和侧向角散射光(SSC)强度的不同,可将血细胞分为三个亚群:透明细胞、小颗粒细胞和大颗粒细胞,组成比例分别为32.71%、58.17%和8.55%。血细胞的平均总凋亡和死亡率为3.76%。血细胞对荧光微球的总吞噬率为63.67%,其中吞噬1个、2个、3个及以上荧光微球的血细胞分别占22.31%、16.39%、24.96%。线粒体数量、溶酶体数量、非特异性酯酶活性和非诱导性活性氧(ROS)含量均在大颗粒细胞中最高,透明细胞最低。结果表明,杂色鲍三类血细胞在结构和功能上均存在差异,两类颗粒细胞可能在鲍类免疫过程中发挥着更为重要的作用。  相似文献   

银河系厚盘的本地空间密度   总被引：1，自引：0，他引：1  

容建湘 《天文学报》1996,37(3):272-277

本文利用北银极天区的现代恒星计数资料，采用标准的银河系模型，通过恒星统计积分方程对参数值组合模型的亮度函数进行计数分析，证明了银河系厚盘恒星成份存在的必要性，并进一步得出太阳附近厚盘成份的空间密度的最佳期望值为薄盘密度的０．０４１．  相似文献   

‘Big data’ for pedestrian volume: Exploring the use of Google Street View images for pedestrian counts     

《Applied geography (Sevenoaks, England)》2015

New sources of data such as ‘big data’ and computational analytics have stimulated innovative pedestrian oriented research. Current studies, however, are still limited and subjective with regard to the use of Google Street View and other online sources for environment audits or pedestrian counts because of the manual information extraction and compilation, especially for large areas. This study aims to provide future research an alternative method to conduct large scale data collection more consistently and objectively on pedestrian counts and possibly for environment audits and stimulate discussion of the use of ‘big data’ and recent computational advances for planning and design. We explore and report information needed to automatically download and assemble Google Street View images, as well as other image parameters for a wide range of analysis and visualization, and explore extracting pedestrian count data based on these images using machine vision and learning technology. The reliability tests results based on pedestrian information collected from over 200 street segments in Buffalo, NY, Washington, D.C., and Boston, MA respectively suggested that the image detection method used in this study are capable of determining the presence of pedestrian with a reasonable level of accuracy. The limitation and potential improvement of the proposed method is also discussed.  相似文献