Intergrated approach for microbiological impact assessment of public wastewater treatment plants

Wastewaters are a source of pathogenic micro-organisms in the environment. The microbial load and residues found in the final effluents of wastewater-treatment plants (WWTPs) depend on the WWTPs' abatement capacity and the final disinfection treatment systems applied to wastewaters before discharge into water. A historical database with data on surface and marine-coastal water quality and on the characterization of WWTP effluents was made using data from 1997 to 2004 to assess the microbiologic impact along the coast of the Venice province (Italy, northern Adriatic sea). The monitoring of river and sea discharges along the coast is integrated with the application of the Synthetic Pluriennal Faecalization Index (ISPF). The experimental study was conducted in the period from November 2002 to April 2004 by the Veneto Regional Environmental Prevention and Protection Agency. The results of this investigation on faecal contamination together with previous data are presented with a preliminary performance characterization of the WWTPs' disinfection technologies (sodium hypochlorite, peracetic acid, UV rays, and ozone).     

Increased Infectious Disease Susceptibility Resulting from Outbreeding Depression

Abstract:  The mechanisms by which outbreeding depression leads to reduced fitness are poorly understood. We considered the hypothesis that outbreeding can depress fitness by increasing the susceptibility of hybrid individuals and populations to infectious disease. Competitive breeding trials in experimental ponds indicated that outbred largemouth bass (  Micropterus salmoides ) crossed from two geographically and genetically distinct populations suffered a reduction in fitness of approximately 14% relative to parental stocks. We measured the comparative susceptibility of these same outbred stocks to a novel viral pathogen, largemouth bass virus. Following experimental inoculation, F2 generation hybrids suffered mortality at a rate 3.6 times higher than either F1 generation hybrids or wild-type parental fish. Analysis of viral loads indicated that viral replication was more rapid in F2 fish than in F1 hybrids or wild-type parental fish. We attribute these results to the disruption of coadapted gene complexes in the immune systems of outbred fish in the F2 generation. Increased susceptibility to infectious disease may be an important but underappreciated mechanism by which outbreeding reduces the fitness of individuals and populations and by which novel infectious diseases emerge in populations of hybrid organisms.     

基于社会燃烧理论的突发公共卫生事件网络情绪传播模型

为有效引导和管控突发公共卫生事件网络舆情,考虑社会相关性和网络群体间情绪状态转移的不确定性,基于社会燃烧理论研究突发公共卫生事件网络情绪传播机制.首先基于社会燃烧理论分析网络用户群体的社会影响因素,建立未燃-阴燃-燃烧-抑燃-稳定(UDBFS)网络情绪传播模型和考虑干预措施的网络情绪传播模型;然后以新冠肺炎(COVID...     

我国棉铃虫病毒杀虫剂的研究开发和应用

棉铃虫核型多角体病毒（ＮＰｖ），从分离开始，经过实验室研究到工厂生产商品销售，至今历经了１８个春秋。是中国生防史上第一次使一种昆虫病毒的研究，从技术上的成功转变成商业上的开发成功。从１９８８～１９９３年，总共生产棉铃虫病毒杀虫剂１００ｔ，使用面积７万ｈａ，（１００多万亩）。在防治棉花、烟叶、辣椒和蕃茄等作物上的棉铃虫和烟青虫方面，均获得了有效的控制。本文主要介绍该病毒的基本特性，生产工艺和应用效果，并展望未来的前景。     

云南省环境监测中心站网络安全对策及应用

根据近年国内网络领域的新技术,结合本单位网络建设的需求及工作经验,从防火墙、入侵检测、防病毒、漏洞扫描、访问控制等几个方面作了阐述,对如何建设一个安全的网络提出了自己的见解。