椰糠对黄瓜穴盘苗生长发育的影响

将草炭、椰糠、蛭石按不同比例配制育苗基质,探讨椰糠对黄瓜秧苗生长发育的影响。结果表明,椰糠具有较好的保水性,酸碱度适合于作为穴盘育苗基质,出苗情况较好,秧苗质量高,证明椰糠是一种良好的园艺栽培基质。     

苹果早期落叶病的综合防治

苹果早期落叶病主要包括苹果褐斑病、灰斑病、圆斑病、轮纹斑病等多种病害。是我国各苹果产区主要发生的病害,为害严重年份,造成苹果树早期落叶,削弱树势,果实不能正常成熟,对花芽形成和果品产量、质量都有明显影响。该病为害苹果外,还可为害沙果、海棠、山定子等。1、症状1.1褐斑病:主要为害叶片,叶上病斑初为褐色小点,后可发展为以下三种类型。轮纹型:     

硒对人体健康的影响

一、硒的抗衰老作用在诸多影响人体衰老的因素中,营养可能是最重要的因素之一。人们发现很多微量元素与衰老有关,如铜、锌、铬、硒等,其中硒是人体生长发育必需的微量元素,在阻止人体衰老过程中具有极其重要的作用。健康成年人体内的硒含量在6—15mg之间即可维持营养平衡,40岁以后随年龄的增长而降低。硒是谷胱甘肽过氧化物酶的活性成份,硒在体内含量的降低必然影啊到谷胱甘肽过氧化物酶活性的降低,清除过氧化脂质能力减弱,自由基含量增高,细胞空间缩小,使细胞膜流动性降低,加快组织细胞老化,人体各器官功能逐渐衰退,各种老年退行性疾病随之…     

壳寡糖与草莓细胞结合过程的研究

 壳寡糖是一类能有效的诱导植物抗病性的重要激发子。本研究用2 - 氨基吖啶酮(22AMAC)标记壳寡糖, 应用激光共聚焦显微成像技术, 研究了壳寡糖与草莓细胞结合过程。结果表明壳寡糖能通过草莓细胞壁与细胞膜结合, 在细胞壁和细胞膜上有其结合位点, 与壳寡糖的结合具有专一性。     

毛皮质量的营养调控

影响毛皮质量的因素很多,如品种、性别、年龄、生理状况、饲料营养、饲养管理、加工过程等。本文从饲料营养水平、添加剂的使用等角度论述营养与毛皮品质的关系。     

磷脂为与水生动物生物膜的关系

磷脂是机体的结构脂类,具有多种生理功能,特别是在维持生物膜结构和功能上有重要作用。本文就磷脂在水生动物体内的合成能力,对生物膜流动性、膜ATPase活性的影响等方面作一综述。     

Comparison of morphology, viability, and function between blood and milk neutrophils from peak lactating goats

The morphological features of blood and milk neutrophils from peak lactating goats were compared using light microscopy, scanning electron microscopy and flow cytometry in order to investigate the cytological changes of neutrophils after migration into the mammary gland. The kinetics of reactive oxygen intermediates (ROI) generation and gelatinase release of blood and milk neutrophils, with or without stimulation of phorbol 12-myristate, 13-acetate ester (PMA), were used to characterize their responses to inflammatory stimuli. Neutrophils isolated from goat milk were highly segmented and contained multi-lobed nuclei. Ultrastructurally, milk neutrophils were more ruffled on the surface compared to blood neutrophils. Approximately 30% of milk neutrophils were undergoing cell death, either necrosis or apoptosis, in contrast to 8% of blood neutrophils. The ROI production of activated milk neutrophils peaked earlier than blood neutrophils, but the duration and the intensity were much less. Neutrophils from both sources augmented the release of gelatinase in response to PMA (1 ng/mL). However, the amount of gelatinase released from milk neutrophils was lower (P < 0.05) than that of blood neutrophils. In summary, more neutrophils become apoptotic and necrotic in the mammary gland, presumably due to spontaneous aging, the process of diapedesis, and the interaction with milk components. Milk neutrophils have impaired functionalities in comparison with blood neutrophils. The information is relevant when studying mammary gland immunity and related diseases, such as mastitis.     

投稿启事

2005年8月28日7时许，内蒙古自治区阿鲁科尔沁旗公安局刑警大队一中队接到报案：8月27日夜间，新民乡某村村民姜某等几家位于村西的约10亩绿豆地里已割下来的绿豆秧被人偷走。     

人为影响下古尔班通古特沙漠小尺度生态环境变化

随着沙漠中油气资源勘探开发、公路建设和重大工程相继实施 ,对生态环境的人为影响日益加深。本文以重大工程实验点为例 ,通过研究对比工程影响区内人工沙垄和自然沙垄的砂质新成土理化性状和植被群落特征 ,指出了沙漠生态环境在人为干扰下发生的一系列变化 ,以及受损生态环境在人们采取积极补救措施的情况下所具有的自然修复能力     

日光温室黄瓜济杂3号的选育

母本88001来源于津杂2号,父本88010来源于津研2号与新泰密刺的杂交后代。其一代杂种济杂3号,瓜条顺直,长30～35 cm,单瓜质量约180 g,瓜把短,瓜皮深绿,密瘤白刺,品质优,商品性好,对霜霉病、白粉病、枯萎病抗性强。每667m~2产量7000～14000 kg,适合日光温室越冬茬和早春茬栽培。