自动观测和人工观测风的差异及其订正的初步研究

利用人工和自动站平行观测的风数据,对两种观测得到风资料的差异进行了对比和分析。结果表明,不同的风速等级、观测仪器以及不同区域对观测差异都有影响;针对不同的影响因子进行了相应的订正,结果显示,按照不同风速等级进行订正的效果最好。     

猪繁殖与呼吸综合征(PRRS)抗体水平检测与分析

为探讨PRRS免疫猪场和非免疫猪场抗体水平差异,采集福建各地区64个不同规模猪场血清样本1 742份,其中免疫猪场40个共1 059份血清,非免疫猪场24个共683份血清;采用美国IDEXX公司PRRS病毒抗体ELISA试剂盒进行检测,分析其抗体阳性率、CV值及S/P区间分布值.结果显示:免疫猪场抗体阳性883份,阳性...     

北京地区规模化奶牛场牛病毒性腹泻病血清学调查

对北京郊区6个未进行牛病毒性腹泻病（BVD）免疫牛场的546份奶牛血清样品,使用牛病毒性腹泻抗体ELISA试剂盒进行检测,并对其中3个牛群进行牛病毒性腹泻病毒（BVDV）血清抗原筛查。共检出阳性血清514份,总阳性率94.1%,其中5个牛场的场内血清抗体阳性率在95%以上。牛病毒性腹泻持续性感染牛（PI牛）筛查的3个牛群均有阳性牛检出。结果表明,北京地区规模化奶牛场存在牛病毒性腹泻感染和接触史,应采取净化措施进行控制。     

重庆市猪群H1亚型猪流感血清学调查

为了解我市猪流感流行状况,从重庆市59个区县58个规模场采集了1056份猪血清,205个散养户采集了768份猪血清,采用HA—H1方法进行H1亚型猪流感抗体检测,结果从21个规模猪场检出H1亚型猪流感,阳性率介于5．33％～81．82％,平均阳性率为7．82％;散养户猪血清H1亚型猪流感介于5．0％～35％,平均阳性率为5．26％。提示H1亚型猪流感在我市部分或局部地区猪流感感染相当高,且目前大部分处于隐性感染状态,应引起高度重视。     

新城疫纳米乳疫苗研制及其免疫效力试验

研制新城疫纳米乳疫苗,并考察其免疫效果。利用伪三元相图法优选配方,并考察其结构类型、形态粒径、稳定性、安全性及免疫效果。结果表明:新城疫纳米乳疫苗为W/O型,澄明均一,乳滴呈球形,平均粒径364 nm;稳定性良好;注射、口服接种安全;每只0.751、.0 mL免疫剂量可产生良好的免疫效果。新城疫纳米乳疫苗安全、稳定、免疫效果好,具有临床应用前景。     

旱地水平沟谷子高产栽培技术

对水平沟谷子栽培技术的推广情况进行了简述,并详细介绍了水平沟谷子栽培技术的内容及应用现状。该技术可使谷子单产提高1倍,受到广大谷农的肯定。     

多巴胺对鸡新城疫疫苗抗体效价的影响

将180只10日龄公鸡随机均分成9组,用新城疫LaSota弱毒疫苗(ND)点眼滴鼻免疫的同时,3个实验组分别肌肉注射高、中、低剂量的多巴胺激动剂和拮抗剂溶液,注射1次/d,连续注射3次,对照组注射生理盐水。各组分别于免疫后7、14、21、28 d翼下静脉采血,分离血清,用微量血凝抑制(HI)测定新城疫抗体效价。结果表明,多巴胺(DA)受体激动剂中剂量组的HI抗体效价明显高于对照组,且呈现一直上升趋势;多巴胺(DA)受体拮抗剂的高剂量组抗体效价明显低于对照组,且呈现一直下降趋势;表明DA对新城疫疫苗的抗体效价有明显的调节作用。     

当前农村地区社会建设应关注的若干问题

加强社会建设近年来党和国家提出的一大重要任务.中国是传统的农业大国,农村社会建设是我国社会建设的重要组成部分.当前农村地区的社会建设应注意发展农村经济,增加农民收入,作为推动农村社会建设的动力.同时注意发展农村教育事业,完善农村基层民主制度,加强农村社会保障体系建设.     

Flavonoids in Food and Their Health Benefits

There has been increasing interest in the research of flavonoids from dietary sources, due to growing evidence of the versatile health benefits of flavonoids through epidemiological studies. As occurrence of flavonoids is directly associated with human daily dietary intake of antioxidants, it is important to evaluate flavonoid sources in food. Fruits and vegetables are the main dietary sources of flavonoids for humans, along with tea and wine. However, there is still difficulty in accurately measuring the daily intake of flavonoids because of the complexity of existence of flavonoids from various food sources, the diversity of dietary culture, and the occurrence of a large amount of flavonoids itself in nature. Nevertheless, research on the health aspects of flavonoids for humans is expanding rapidly. Many flavonoids are shown to have antioxidative activity, free-radical scavenging capacity, coronary heart disease prevention, and anticancer activity, while some flavonoids exhibit potential for anti–human immunodeficiency virus functions. As such research progresses, further achievements will undoubtedly lead to a new era of flavonoids in either foods or pharmaceutical supplements. Accordingly, an appropriate model for a precise assessment of intake of flavonoids needs to be developed.Most recent research has focused on the health aspects of flavonoids from food sources for humans. This paper reviews the current advances in flavonoids in food, with emphasis on health aspects on the basis of the published literature, which may provide some guidance for researchers in further investigations and for industries in developing practical health agents.     

CIMMYT玉米种质AC8328BNC1的耐瘠性研究

采用不完全随机区组设计,通过玉米品种和施肥水平两因素试验,对玉米生物学和经济学性状作变异度分析,对小区产量作方差分析和对单位产量作差数百分率分析,以系统鉴定CIMMYT玉米种质AC8328BNC1的耐瘠性.结果表明:①AC8328BNC1具有较强的耐低氮和低磷能力,有良好的丰产性和广泛的适应性,是一个优良的国外玉米种质资源,应加大研究和利用力度;②在低肥力土壤上,更应重视玉米科学合理施肥的重要性和追第二次肥的必要性。