SPF雏鸡感染REV后IL-6和IFN-γ mRNA表达的动态变化

建立并利用鸡白细胞介素6和γ干扰素荧光定量RT-PCR方法,对于禽网状内皮组织增生症病毒(Reticuloendo-theliosis virus,REV)感染SPF鸡后主要免疫器官的鸡白细胞介素6和γ干扰素基因转录水平进行了初步研究.结果表明,与对照组相比,处理组脾脏、胸腺和腔上囊中IL-6和IFN-γ的分泌水平在所有时间点均显著升高(P＜0.05)或极显著升高(P＜0.01).本试验为探讨REV感染的免疫抑制机理打下了一定基础.     

反季节番茄品种的筛选及播期试验

长沙地区番茄反季节栽培首选品种为９８－Ｃ，湘番茄１号可为早栽品种，最适宜的播期在７月１５日左右，早熟品种８月５日前，迟熟型品种７月底前均可播种。     

Guthrie法诊断苯内酮尿症最适条件的研究

试验以枯草芽胞杆菌ＡＴＣＣ６６３３株等材料，研究了诊断苯丙酮尿症（Ｐｋｌ）Ｇｕｔｈｒｉｅ检验的有关条件。其结果为，以２．００×１０５／ｍＬ菌孢子浓度，０．５％琼脂含量并制成３ｍｍ厚的Ｄｅｍａｉｎ培养基，最适宜Ｇｕｔｈｒｉｅ检验。     

吡啶羧酸铬对肉鸭后期作用效果初探

选用21日龄樱桃谷鸭36只，采用有重复对照试验，比较饲粮中添加0．2×10－6吡啶羧酸铬对肉鸭生产性能、屠体品质和血液生化指标的影响。结果表明，吡啶羧酸铬对增重、饲料转化率无显著影响，对屠宰率、胸肌率和皮脂率亦无显著影响；但使心重、血清总甘油三酯显著降低，血清总胆固醇、高密度脂蛋白胆固醇显著增加。     

^60Co—γ射线诱发的籼型温敏核不育水稻叶色突变系变异分析

＾６０Ｃｏ－γ射线诱发的８个灿温敏核不育系水稻叶色突变系可分为三种类型，即叶色突变高温表达型、低温表达型及温钝型。     

陆地棉三体的诱发,鉴定,研究和利用：IV.第19染色体三体的发现及鉴定

本文首次报道了一个新的陆地棉三体（Ｆｔｒ－６）的发现，并对其形态，减数分裂中期Ｉ染色体构型进行了研究，同时，通过其与一套易位系杂交Ｆ１花粉母期细胞染色体构型的细胞学检测，证明Ｆｔｒ－６可能是第１９染色体的三体。     

白菜型油菜双显性核不育896AB恢复系基因型的鉴定

以白菜型油菜双显性核不育896AB为材料，采用成对兄妹交和相应可育株自交，验证显性不育基因的遗传;用恢复系与全不育系测交，测交一代与临保系复交，验证显性恢复基因的抑制作用，并区分F2代育性分离为3:1和13:3的遗传类型。经4个年度的研究认为，育性是由一对显性不育基因MSMS和一对显性可育基因RfRf互作控制，且显性可育基     

浅谈电子文件对档案工作的影响及对策

电子文件的大量出现，不仅对档案管理理论造成了很大的冲击，更重要的在于促使管理理念的更新，管理视角的转变。通过对近年的电子文件定义及其特点综述、电子文件对档案业务管理工作的影响、及电子文件档案学理论的影响和对策进行简要介绍。     

泰安市污水处理厂处理城市污水的研究

本文详细阐述了AB工艺的原理及A2O工艺的特点。并就测得的数据分析了CODcr与BOD5之间显著的线性关系;对年间、季度间的CODcr去除率进行方差分析,结果表明CODcr年间去除率存在一定差异,季度间去除率稳定;通过比较TP与TN的去除率,分析了具有脱氮除磷功能的A2O工艺在实际运行中存在的问题。     

Transpositional feeding rhythm of loach <Emphasis Type="Italic">Misgurnus anguillicaudatus</Emphasis> from larvae to juveniles and its ontogenesis under artificial rearing conditions

The diel feeding rhythm and ontogenesis during early life stage of loach Misgurnus anguillicaudatus were investigated under experimental conditions (light: L 06:00–18:00, D 18:00–06:00 h). Morphological and behavioral developments of loach from newly hatched to 40 days after hatching were observed. Larvae were able to prey on daphnia 3–4 days after hatching at 23 ± 0.5°C. As the larvae grew, they showed an increasing feeding capacity and a distinct feeding rhythm. Feeding intensity and incidence for day-4 larvae were highest at 10:00 and 16:00 h. The highest levels of feeding intensity for day-12 larvae occurred at 08:00, 12:00, and 18:00 h as did feeding incidence. By day 20, when the larvae metamorphosed, the highest levels of feeding intensity occurred at 06:00, 18:00, and 24:00 h and were concurrent with the highest feeding incidence. After metamorphosis, feeding capacity had again increased considerably and, in contrast to the earlier stages before day 20, feeding intensity for day-30 juveniles peaked at 05:00 and 20:00 h, about 1–2 h after the maximum feeding incidence. The feeding rhythm of loach juveniles at day 40 was almost the same as the day-30 juveniles. The estimated maximum daily feeding rates were 43.1%, 33.4%, 19.0%, 12.8%, and 5.8% of body weight on days 4, 12, 20, 30, and 40, respectively. Thus, loach was found to have different feeding rhythms in the pre- and post-metamorphosis stages, with the highest feeding activity in daytime during the larval planktonic stage before metamorphosis, and intensely nocturnal feeding behavior during the juvenile benthic stage after metamorphosis.