THE EXISTENCE OF PERIODIC SOLUTIONS AND GLOBAL ATTRACTIVITY OF A CONTINUOUS MODEL OF BOBWHITE QUAIL

The existence of a positive periodic solution foru'(t) =u(t)[α(t)-1+β(t)/1+uk(t-τ(t))], t≥0is established. Some sufficient conditions are obtained for the periodic solution to be globally attractive.     

两种消毒方法在鹌鹑种蛋孵化中的应用及其效果比较

主要研究两种不同的消毒方法在鹌鹑(Cotournixcoturnix)种蛋的孵化中的应用及其效果.甲醛熏蒸法在孵化率上较好.     

利用DGE技术筛选雌雄鹌鹑胚胎发育至第3天与性别分化相关的差异表达基因

为了研究鹌鹑早期性别分化时期基因的表达情况,本研究利用数字表达谱技术(DGE)对发育至第3天的雌性鹌鹑胚胎和雄性鹌鹑胚胎进行研究。结果显示:建立了雌性鹌鹑胚胎和雄性鹌鹑胚胎2个DGE文库,对比分析后得到了34个差异表达的基因,其中雌性胚胎相对于雄性胚胎10个为上调基因,24个为下调基因,通过对这些差异基因进行GO/KO富集性分析,筛选出了4个跟性别分化相关的基因,分别为HINT1、ASW、HSD17B4基因和未知功能的ID为ENSGALG00000013312的基因。     

镉和铅对鹌鹑肝脏金属硫蛋白的诱导

鹌鹑（Coturnix cotumix japonica）经口染毒CdCl₂溶液或CdCl₂和PbCl₂混合溶液,16 d后剖杀,取肝脏,Sephadex G-75柱层析得到肝脏金属硫蛋白(metallothionein,MT).经氨基酸组分检测分析其生化特性,结果表明纯化所得蛋白具有63个氨基酸残基,半胱氨酸含量为31.83%,分子量为6 614 Da,与哺乳动物金属硫蛋白的生化性质相类似.运用镉-血红蛋白饱和法对鹌鹑肝脏中MT进行定量测定,结果显示镉和铅可诱导鹌鹑肝脏内MT合成的增加,且肝脏中MT的含量随着金属暴露浓度的增加显著提高.这表明鹌鹑体内MT维持重金属内稳态的机制可能和哺乳动物体内的极为相似.     

烟酰水杨酸对鹌鹑实验性脂肪肝的预防作用及机理初探

应用高脂饲料诱发的脂肪肝模型,观察烟酰水杨酸对鹌鹑实验性脂肪肝的预防作用并对其主要机理进行初步探讨。用NSA150mg·kg-1·d-1、NSA300mg·kg-1·d-1、NSA600mg·kg-1·d-1灌胃8周,可明显降低肝脏TG、TC和肝系数,并可使肝组织脂变程度明显减轻,烟酰水杨酸可显著激活脂蛋白脂酶(P<0.01)、抑制肝脂酶(P<0.05)。烟酰水杨酸对鹌鹑实验性脂肪肝有明显的预防作用,这一作用与激活脂蛋白脂酶、抑制肝脂酶有密切关系。     

葛根-丹参组方对动脉粥样硬化鹌鹑血管内皮组织的影响

目的:考察葛根-丹参(1:1)组方对动脉粥样硬化鹌鹑血管内皮组织的影响.方法:连续喂养高脂饲料造模同时给药,观察葛根-丹参对动脉粥样硬化鹌鹑主动脉组织脂质斑块、内皮及内膜组织的影响.结果:葛根-丹参组方配伍后,无论乙酸乙酯部位还是水提物,均能较好的减少泡沫细胞及脂质的沉积,改善内皮细胞的肿胀、变性,抑制血管内膜的增厚及巨噬细胞的数量,尤以乙酸乙酯部位作用明显.结论:葛根丹参组方配伍具有一定的减少主动脉组织脂质斑块形成,保护血管内皮细胞作用,有效地阻止AS的形成与发展.     

Effective Microorganisms (EM) Improve Internal Organ Morphology,Intestinal Morphometry and Serum Biochemical Activity in Japanese Quails under Clostridium perfringens Challenge

The effect of effective microorganisms (EM) on internal organ morphology, intestinal morphometry, and serum biochemical activity in Japanese quails under Clostridium perfringens challenge was determined. After 30 days of EM addition, one group of quails was orally inoculated with Clostridium perfringens. The second group did not receive EM and was inoculated with C. perfringens. In the gut, EM supplementation reduced the number of lesions, enhanced gut health, and protected the mucosa from pathogenic bacteria. EM showed an anti-inflammatory effect and fewer necrotic lesions in villi. In the internal organs, EM showed a protective effect against a typical lesion of C. perfringens infection. Necrosis and degeneration of the hepatocytes, necrosis of bile ducts, and bile duct proliferation were more severe in the infected group without EM. Morphometric evaluation showed significantly higher villi in the jejunum after EM addition. A greater crypt depth was observed in the C. perfringens group. Biochemical analysis of the blood indicated lower cholesterol on the 12th day of the experiment and between-group differences in total protein, lactate dehydrogenase (LDH), and albumin levels in the EM group. Further studies are needed to improve EM activity against pathologic bacteria as a potential alternative to antibiotics and to develop future natural production systems.     

鹌鹑血清中脂类代谢相关生化指标正常参考值的测定

目的建立鹌鹑血清中脂类代谢相关生化指标的正常参考值。方法饲养40只鹌鹑（5周龄,体质量150～200 g,雌雄各半）,动态观察其血清中甘油三酯（TG）、总胆固醇（TC）、高密度脂蛋白（HDL）和低密度脂蛋白（LDL）的含量变化,其中TG采用终点法/GPO-PAP Method检测,TC采用终点法检测,HDL和LDL采用直接测定法检测。结果雄性和雌性鹌鹑血清中TG、TC、HDL和LDL值存在差异,且差异有统计学意义;不同取血时间,雄性鹌鹑血清中脂类代谢指标比较稳定,确定其参考值范围,TG为1.15～1.55 mmol/L、TC为4.18～5.30 mmol/L、HDL为2.38～3.90 mmol/L、LDL为0.63～2.07 mmol/L。结论初步建立了雄性鹌鹑血清中脂类代谢相关生化指标的正常参考值。