|
|
| 41. | Thermal manipulations during broiler embryogenesis and the post-hatch period can improve thermotolerance acquisition, alleviate the heat stress response, reduce production loss and death in broiler challenged by heat stress. |
| 在胚胎发育后期和育雏早期分别给予鸡胚或雏鸡适当强度的高温刺激,可以激活或完善其在极端热环境下的体热调控机制,增强其生长后期再次遭遇极端热环境的适应能力,从而从根本上减轻肉鸡遭遇夏季高温而引起的热应激反应 |
|
|
| | |
| 42. | Methods Fifty 1 -day-old leghorn chicks were randomly and equivalently divided into five groups,and the right eye of each chick was closed with a plastic goggle to induce FDM at 4,7,14,21 and 30 days after birth respectively, the left eye served as control for each chick itself. |
| 方法 取1d龄来亨雏鸡以半透明眼罩分别遮盖右眼4、7、14、21、30d制备FDM动物模型,未遮盖眼为自身对照眼,并随机选取同数目同龄小鸡作为正常对照眼。 |
|
|
| | |
| 43. | Those raised in an unpredictable environment had a worse spatial memory than their calmer counterparts and, weirdly, that effect was repeated in their offspring, even though those chicks had grown up contented. |
| 饲养在不可预知环境中的家鸡，其空间记忆能力不如生活较为安逸的家鸡，而且奇怪的是，前者所出现的这种情况还会延续到其后代身上，即便雏鸡在舒适的环境中生长也是如此。 |
|
|
| | |
| 44. | The results showed that,at 12～48 hrs post infection,the bursal epithelial cells bore swollen and necrotic shape.The lymphoid cells in the medulla and cortex of lymphoid follicles had various degrees of degeneration and necrosis.The lymphoid follicles showed glandular structures or cystic vacuoles owing to the prolifetation of bursal epithelium and lymphocyte depletion.Lymphoid follicles from bursa at 72～144 hrs post inoculation became atropy.Marked proliferation of interfollicular and interstitial connective tissue was present. |
| 结果表明，病毒感染后12～48小时，雏鸡法氏囊粘膜上皮细胞肿胀、坏死脱落，淋巴滤泡髓质部及皮质部淋巴细胞不同程度变性、坏死、排空，形成腺管样结构或囊状空泡，接毒后72～144小时，法氏囊淋巴滤泡淋巴细胞坏死排空 |
|
|
| | |