Parasites of the blue shark (Prionace glauca L.), in the North-East Atlantic Ocean

A total of 159 blue sharks, ranging in length from 64 to 228 cm, was collected from the tuna drift-net fishery operating in the North-East Atlantic Ocean, and a parasite analysis conducted. The parasite assemblage consisted of three copepod species, one nematode species and four cestode species. The copepods Kroyeria lineata and Phyllothereus cornutus both occurred on the gills, while Echthrogaleus coleoptratus occurred on the skin. The third larval stage of the nematode Anisakis simplex was recorded from the lumen of both the stomach and spiral valve, but it seems likely that these specimens were a build up of parasites from consumed prey, and were not actively parasitizing the sharks. The cestodes Prosobothrium armigerum, Anthobothrium laciniatum and Platybothrium auriculatum were all recorded from the spiral valve, while Hepatoxylon trichiuri was recorded from the body cavity. All species with the exception of E. coleoptratus displayed a negative binomial distribution, although Green's Index determined that the degree of aggregation was only slight. Infection parameters varied widely among species, but the most abundant parasite was K. lineata, which was recorded from all of the sharks examined.     

基于Shark的工作流在保险行业服务领域的应用

工作流管理系统目前处于技术发展曲线上的相对成熟阶段,不同的人对工作流的理解不同,从而也出现了众多的工作流软件,如Ofbiz、Enhydra Shark、Osworkflow、Jbpm、Obe等。结合在开发太平人寿保险有限公司客户服务中心中工作流管理系统的一些经验,力图通过对其中一种优秀的工作流引擎Shark的介绍,来促进人们对工作流技术的了解。     

血管生成抑制因子研究

<正>引言异常血管形成会引起多种疾病.搪尿病引起的视网膜病,风湿性关节炎等均由毛细血管生长异常所致血管的异常生长亦为恶性肿瘤的指数生长提供足够的氧气和营养物质.     

基因重组鲨鱼软骨血管生成抑制因子的发酵条件优化

采用三角摇瓶来优化基因工程菌表达重组鲨鱼软骨血管生成抑制因子(SCAIF)的最佳发酵条件,并以此为基础在Biotop CF-10L自动控制发酵罐进行发酵培养.基因工程菌BL21(DE3)/pET3c(SCAIF)诱导表达SCAIF蛋白的最佳摇瓶培养条件是:接种量为2%、装液量为75 mL/500 mL、加入IPTG的诱导时间为培养2 h后、IPTG浓度为0.25 mmol/L、诱导时间为2 h.BL21(DE3)/pET3c(SCAIF)菌种在Biotop CF-10L自动控制发酵罐中的条件为:以10%的接种量接种到10 L发酵培养基中,设定pH 7.0,温度37℃,培养4 h后,加入终浓度为0.5 mmol/L的IPTG,诱导2 h后终止发酵.发酵罐中获得的菌体量为10.2 g/L,蛋白表达率为25%左右.     

电子商务安全协议分析

对两种常见网络协议的结构进行了分析与比较,通过实际网络环境操作,验证了SSL协议的安全性。     

A new species of Pandaridae (Copepoda), from the whale shark Rhincodon typus (Smith)

The copepod Pandarus rhincodonicus sp. nov. (Copepoda: Pandaridae), collected from whale sharks, Rhincodon typus (Smith, 1828) (Orectolobiformes: Rhincodontidae), swimming off the North West Cape of Western Australia, is described. Pandarus rhincodonicus is closely related to Pandarus cranchii Leach, 1819. However, P. rhincodonicus differs from P. cranchii in: the armature of the posterior margin of the cephalon; the plates of segment 2 extend almost to the limit of segment 4; the shape of the caudal rami and shape of the dorsal abdominal plate; and the distribution and numbers of spines and setae on thoracic appendages. It is suggested that P. rhincodonicus is a commensal.