日粮锌硒水平对肉鸡小肠黏膜结构的影响

为了探讨微量元素锌和硒互作对肉鸡小肠黏膜结构的影响 ,将 2 4只 1日龄AA肉鸡随机分为 3组 ,分别饲喂添加有高锌高硒 (锌 1 0 0 0mg/kg ,硒 5mg/kg)、低锌低硒 (锌 34mg/kg ,硒 0 .0 8mg/kg)和常锌常硒 (锌 5 0mg/kg ,硒 0 .1 5mg/kg)的日粮 4 5d后 ,观察小肠黏膜的形态结构变化。结果表明 ,高锌高硒或低锌低硒组肉鸡的小肠黏膜结构有明显的损伤 ,表现为黏膜厚度和绒毛高度下降 ,绒毛高度 /腺窝深度的比值减少 ,肠黏膜上皮细胞萎缩。尤其是高锌高硒对空肠的损伤最为严重。而常锌常硒组肉鸡小肠黏膜的形态结构正常。研究结果表明 ,日粮中按锌 5 0mg/kg和硒 0 .1 5mg/kg的比例添加 ,对于维持小肠黏膜的正常形态结构是合适的 ;过高或过低的锌和硒对小肠黏膜有毒性作用 ,且高锌和高硒可相互促进其毒性作用     

“文革”三大干将的人生结局

王力、关锋和戚本禹三人曾是“文化大革命”中响当当的知名人物。然而,当真理最终战胜了虚妄,理智最终战胜了狂热,伴随那场“红色风暴”过后,他们的人生结局如何,却鲜为人知。中央文革第一号“大笔杆子”——王力王力在进中央文革之前,就写了一系列重要文章,包括参与写“九评”     

外贸对产业结构的影响分析

文中就外贸对经济结构的影响进行了分析,提出了外贸对产业结构影响的途径,并针对1990-2004这段时间以来我国对外贸易与产业结构的关系进行实证研究。结果表明外贸对第一、三产业的影响不强,但是,对第二产业增加值的贡献率较高,外贸较大程度地促进了第二产业的发展与产业结构的优化。     

未成年人发展的动力学研究

未成年人的成长,在生物预置因素和环境因素的相互作用下,不可避免地要经历三大嬗变期新生期、断奶期和青春期。未成年人成长始终伴随着生物本能需求和自我需求与社会规范要求之间的冲突与协调,因此,未成年人发展的全过程是同一性建构——危机——再建构的过程。当然,未成年人发展还受到系统初始条件、大脑神经网络的电化学模型和“神经元—意识”耦合机制及“耗散—涨落”机制的影响。     

Natural death as viewed by the medical examiner: a review of 1000 consecutive autopsies of individuals dying of natural disease

A study of 1000 consecutive autopsies of individuals dying of natural disease was conducted. Cardiovascular disease was responsible for 60.9% of all deaths with coronary artery disease--not only the main cause of cardiovascular death but also the main cause of all natural deaths--accounting for 45.1% of such cases. Diseases of the central nervous and respiratory systems accounted for 8.7 and 8.6%, respectively, of the natural deaths. Seizure disorders and pneumonia were the main causes of death in these organ systems. There were 124 deaths of children less than one year in age, 91 of which were due to sudden infant death syndrome (SIDS). All of the SIDS deaths were in children less than 10 months old.     

知识经理:信息时代企业的新领导岗位

知识经理是信息时代企业的新种类的领导岗位。知识经理的多重角色和知识经理的管理职能,在信息时代的企业管理中具有极其重要的意义。     

论农民工劳动休息权的保护

劳动者有休息的权利,这是我国宪法中明文规定的。但一些单位变相安排劳动者加班,一些劳动者得不到法定的加班报酬、甚至有人因为连续劳动引发过劳死；也有些公民由于某些企业擅自安排夜间加班,而受到其噪声骚扰无法正常休息。而在这其中,对农民工的劳动休息权的侵犯尤为严重。农民工作为一个弱势群体,相对于出身城镇的劳动者而言,在劳动权益的保障方面受到了差别对待,这其中对于劳动休息权的保障亦是如此。无论是从人类政治文明发展的一般进程看,还是从社会主义法制建设的一般进程看,这些侵犯农民工劳动休息权的行为都是极其不合理的,需要对农民工劳动休息权进行平等保护。     

社区矫正评估研究

罪犯进入社区矫正,首要考虑其是否存在再犯罪的风险,而评估再犯风险的方法有单一的主观评估和客观评估、静态评估或动态评估.由于任何一种单一的评估方法都不可避免地存在不足,因此,选择综合动态的评估也就成了一种必然.     

Rules and Flexibility in Public Budgeting: The Case of Budget Modernisation in Australia

This paper explores the features of public budgeting that make it resistant to efforts to balance central oversight and situational flexibility. Its aim is to help explain why systemic efforts at budget modernisation in the name of ‘devolution’ may have failed to deliver expanded budget flexibility. After defining flexibility, and briefly surveying how it can be inhibited by budget practices using the example of collaboration, the paper applies a taxonomy of general ‘budget rules’ to illustrate the trade‐offs between control and flexibility. It uses an analysis of budget reform in the Australian federal government over the last 30 years to identify a key set of ‘legacy reforms’ – all intended primarily to enable budget flexibility – to show how their design and redesign were purposed as modification to the general rules, and how, ultimately, they were constrained by them.