外观健康家犬携带狂犬病病毒状况调查

为了解外观健康家犬携带狂犬病病毒的状况,采用RT-PCR方法对广西13个城市外观健康家犬的脑组织进行了检测,结果阳性率为1.76%(5/283),证明广西外观健康家犬在一定程度上存在带毒现象。     

水产生态健康养殖探析

为实现水产养殖业的快速、健康发展,全面分析了水产养殖业的发展现状,并根据水产健康养殖的含义,提出了水产健康养殖应采取的措施。     

Prevalence of Streptococcus suis Isolated from Clinically Healthy Sows in China

Streptococcus suis is an important pathogen in pigs. Transmission of this pathogen is generally believed to occur between healthy carrier sows and their offspring, so the carrier status of S. suis in healthy sows is important for the control of S. suis infections in pigs, especially in suckling and growing pigs. In this study, the prevalence of S. suis isolated from clinically healthy sows in China was studied for the first time. A total of 1 043 tonsil samples were collected from clinically healthy sows from 10 regions in China from 2005 to 2007. Among the 421 S. suis isolates, 31 strains were identified as capsular type 2. The results showed that S. suis was widespread in swine herds in China with the carrier rates in different herds ranging from 19.5 to 93.9%. Overall, 40.4 and 3.0% of clinically healthy sows harbored S. suis and capsular type 2 in their palatine tonsils, respectively. Statistically significant differences of carrier rates of S. suis and capsular type 2 between the different farms were observed, which was independent of herd sizes and geographic distributions of different herds.     

农产品保健品质改良的若干研究动态

以某些农产品为例 ,阐述了农产品保健品质的若干研究动态 ,并就采用遗传育种的方法改良农产品品质的研究进展作了评述     

Probing into Healthy Lighting

Lighting serves human's development and requirements.Healthy lighting not only meets urgent needs that the society develops ahead and healthily,but emphasizes human's effects on physiology and psychology by lighting,thus making lighting healthy.Besides,like green lighting,healthy lighting also stresses energy saving and environmental protection,and emphasizes that lighting should satisfy human's amfort able demands on physiology and psychology.So,healthy lighting is the necessity of the development of green lighting and comfortable lighting,but it more stresses the health function.In a word,healthy lighting is a lighing favourable to healthy development of human,environmnet and society,and it is a 21st century lighting according with the sustainable development strategy.     

菌类合理饮食搭配对健康的影响

健康的饮食结构、合理的膳食对人体的健康具有重要的意义.菌类食品作为重要的健康食品,在饮食中合理搭配菌类食品,不仅能够提供人体所必须的营养物质,而且菌类食品独特的药用价值,能够提升人体的免疫力,对人的身体健康大有裨益.     

蛋鸡健康养殖网络化管理信息系统

该文阐述了基于.NET技术和ERP思想的蛋鸡健康养殖网络化管理信息系统的研发过程。该系统选用Windows 2003 Server平台、SQL Server 2000数据库、Visual Studio .NET 2003开发环境和C#开发语言。系统包括员工服务、人事管理、文档管理、饲料管理、蛋鸡管理、视频监控、鸡病查询、鸡蛋查询、系统维护等9个模块。借鉴“产前、产中和产后”的全程管理思想,利用“从车间到餐桌”的鸡蛋编码可追溯技术,采用了鸡舍环境预警模型,使得消费者可以从网上查询到具有Egg ID鸡蛋的相关信息(鸡蛋生产厂商、生产地点、生产时间、蛋鸡信息和生产环境等)。该系统在存栏120万羽蛋鸡的北京某蛋鸡场得以应用。     

黄瓜壮苗指标与辐热积关系的模拟模型

为预测温室黄瓜幼苗的健壮程度,该文探讨了黄瓜根冠比、G值(全株干质量与育苗天数之比)、壮苗指数3个壮苗指标与环境温度和辐射的关系,以2个不同生态型黄瓜品种‘津春4号’和‘戴多星’为试验材料,通过分期播种试验及回归分析,建立了以辐热积为尺度的温室黄瓜壮苗指标模拟模型,并利用独立试验数据对模型进行了检验。结果表明,根冠比与辐热积曲线拟合度差,G值模型的模拟值与实测值符合度低。在该试验条件下,这2个壮苗指标均不适宜用辐热积做变量进行模拟。黄瓜壮苗指数与辐热积曲线拟合度高。模拟结果与实测值之间的回归标准误差(RMSE)为0.0040,说明模型具有较高的预测精确性;壮苗指数的模拟值与实测值之间基于1∶1直线的决定系数(R2)分别为0.9854(津春4号)和0.9761(戴多星),F检验均达极显著水平,表明模拟值与实测值的符合度高。该研究建立的基于辐热积的黄瓜壮苗指数模型能较准确的预测黄瓜幼苗健壮程度,所用参数少,模型实用性较强,可为黄瓜育苗中幼苗健壮程度的预测提供有效方法,也可为黄瓜育苗中的温光管理提供决策支持。     

畜禽健康养殖过程中HACCP体系的建立

探讨了畜禽健康养殖过程建立HACCP管理体系的可行性,并根据HACCP基本原理及应用准则,对畜禽健康养殖生产的各个环节进行了危害分析,建立了畜禽健康养殖过程HACCP体系.笔者利用关键控制点判断树的方法,确定了引种、饲料、兽药、疫苗、饲养管理和销售装车6个养殖过程的关键控制点,并制定了详细的HACCP计划.     

一类时变疾病控制系统的研究

讨论了含疾病因素人中控制系统的数学模型－一类积分、偏微分方程组。实现了这个数学模型和时变人口大系统数学模型的相互转化；当人口大系统在稳定状态下，给出了康态人口子系统和病态人口子系统的变化趋势。