库区受淹企业停产损失评估与补偿计算

为了正确估算库区受淹工矿企业的补偿投资,除了要对企业拥有的固定资产进行评估,还需要对企业停产损失进行合理估算。企业停产损失是指该企业在正常生产条件下需发生的、迁建停产期间也必须发生的各项费用及其它额外开支。本文对库区受淹企业的停产损失评估及补偿投资计算进行了探讨,通过分析停产损失的评估内容,提出了停产损失的评估方法和确定合理停产期所应考虑的因素,在此基础上计算了受淹企业停产损失补偿投资 。     

Rickettsia-like organism infection in a freshwater cultured fish Ophiocephalus argus C.in China

From 2001 to 2002,a new and emergent infectious disease of Ophiocephalus argus occurred in a fishery in Hubei Province,China,with an incidence of 60%～70% and a mortality as high as 100%.The diseased fish showed an enlarged abdomen,the millet-like nodules in internal organs,and the swollen kidney which was composed of 5～10 sarcoma-like bodies in cream or gray-white colour or ulcerated into beandregs-like substance.Light microscopic observation revealed the basophilic or acidphilic inclusions in cytoplasm of the cells and the granulomas,a diffusive chronic inflammation in internal organs.Further analysis under an electron microscope indicated that the intracytoplasmic inclusions were rickettsia-like organisms (RLOs) that are either spherical or coccoid,with variable size,ranging from 0.5～1.5 μm in diameter,and enclosed within membrane-bound cytoplasmic vacuoles.RLO had a central nucleoid region with some fine filamentous structures and an electron-dense granule.Its cytoplasm contained abundant ribosomal bodies.Occasionally,RLO appeared to be divided by binary fission.RLOs were also observed in the homogenized tissue of infected fish.The results suggested that the death of cultured O.Argus was caused by RLO infection.     

盐酸副玫瑰苯胺分光光度法测定SO2影响因素探讨

本文对盐酸副玫瑰苯胺分光光度法测定ＳＯ２的影响因素如试剂浓度、温度、酸度等进行了探讨。     

北部湾金黄水母Chrysaora helvola Brandt刺细胞毒液溶血活性

【目的】探讨金黄水母Chrysaora helvolaBrandt刺细胞毒液(nematocysts venom,NV)的红细胞溶血活性特征及可能机制。【方法】通过分光光度法测定红细胞溶解释放血红蛋白的量来确认不同条件和药物对NV诱导红细胞溶血行为的影响。【结果】NV诱导的红细胞溶血与其总蛋白浓度存在依赖关系。溶液pH值、大分子非电解质渗透压保护剂PEGs均能显著影响其溶血活性;非电解质小分子糖类渗透压保护剂D-甘油和D-半乳糖对溶血活性影响很小,但D-葡萄糖能显著延缓溶血。NV同时具有Ca~(2+)依赖的弱磷酸酯酶A2(PLA_2)活性,且受组氨酸烷基化试剂p-BPB抑制。这一PLA2活性可能对其红细胞溶血活性也有贡献。【结论】NV的红细胞溶血活性可能由膜穿孔机制和所含PLA_2酶成分造成,并受到含葡萄糖单元结构的糖受体调节。     

跨流域补偿调节优化数学模型

本文应用高维DP建立了跨流域补偿调节优化数学模型,并提出了系统和子域循环迭代、多级逼近和降维交错使用的算法,及采用了库群结构矩阵和排队技巧,使模型适用于大范围、动态的跨流域水电站群补偿调节计算.本文以分布于长江、澜沧江和珠江上近百座水电站群为算例,较好地解决了水文补偿和库容补偿的相互影响.