动物饲养学的趣味性教学

趣味性教学是一种以调动学生学习积极性、主动性,从而达到提高教学效率的教学手段。文章结合作者的教学实践,简要介绍了动物科学专业基础课动物饲养学教学过程中增强课堂趣味性的一些做法,以给相关课程的教学提供借鉴。     

Dances with bees: Exploring the relevance of the study of animal communication to informatics

This paper describes part of a larger body of theoretical work which provides a new perspective on the nature of informatics, an umbrella term used to stand for the overlapping disciplinary areas of Information Systems, Information Management and Information Technology. We argue for an area of interest located at the intersection of signs and systems, which involves the enactment of forma (the substance of a sign), informa (the content of a sign) and performa (the use of signs within coordinated action). This conceptual scheme is reflected against work not traditionally covered by theory-making within informatics: that of animal communication. We use the well-documented case of the dance of the European honeybee to help ground our discussion. This examination leads to an understanding of the central position of communication amongst organisms as well as the place of human communication in the broad evolution of communication systems. This allows us to highlight crucial features of the concept of a data system as well as the important distinction between persistent and non-persistent data systems within communication processes.     

高寒草甸畜牧业可持续发展：理论与实践

“生态系统管理”是畜牧业可持续发展的重要理论基础。放牧家畜饲养周期长,出栏率低,是制约高寒草甸畜牧业生产的最大瓶劲。因此,采取一系列生态系统管理措施,如建立人工草地、修建牲畜暖棚并进行牛羊舍饲育肥、退化草地恢复与重建、优化畜群结构和优化放牧强度等,实现畜牧业的集约化经营,是高寒草甸畜牧业持续发展的必由之路。     

牧用林业对草地畜牧业持续发展的作用

牧用林业是草地生态建设的重要途径之一。本文给牧用林业的概念及内涵予以表述之后,对其在草地生态系统中所发挥的生态经济效益进行了浅析,阐述了牧用林业在草地畜牧业持续发展中显示出的显著作用。     

“雨课堂”在动物营养学教学实践中的改革探索

“雨课堂”作为紧跟网络化信息化时代的产物,必将成为现行各类教育教学方法改革的试金石。文章就动物营养学课程在传统授课过程中存在的问题进行分析,并与作者通过“雨课堂”教学模式进行对比,发现“雨课堂”能够弥补传统单一授课模式存在的一些不足。     

以读书为本以名著为师自有别材——《盗龙者》、《牲人祭》、《废墟》创作谈

用创作的眼光读小说,小说创作无规律却可传授,创作自有别材,以名著为师,读书是根本,作家应是思想家。     

THE SOCIAL SHAPING OF A LABORATORY: THE ESTABLISHMENT OF THE AUSTRALIAN ANIMAL HEALTH LABORATORY

Technologies are often presented and perceived as being inevitable, natural and necessary, as if they were the products of some inner logic. As a result, there has been a tendency in the past to focus on the effect or impact a technology has on society at the expense of investigating the origin of the technology. More recently, efforts have been made to penetrate the ‘black box’ of the technological artifact in order to reveal the variety of ways technologies are shaped. This paper will discuss the economic, political and other social factors which shaped the Australian Animal Health Laboratory and which determined its proposed functions.     

动物法律地位的界定及思考

自从德国民法典第90a条规定“动物不是物”及德国1998年修订的《动物福利法》和奥地利2004年修订的《联邦动物保护法》把动物确定为人的伙伴动物之后,动物的法律地位问题再次得到我国学者的关注。一些学者经研究后认为,动物可以成为法律关系的主体。在对这些立法及国外特殊的判例和风俗进行分析的基础上,认为动物只能是特殊的法律关系客体或者保护对象。     

近50年青藏高原气候变化及其对农牧业的影响

本文主要讨论了青藏高原最近50年的气温、降水以及其它气候因子变化及对农牧业的影响。青藏高原气温呈上升趋势,平均最低气温的升高趋势大于平均最高气温的升高趋势。青藏高原降水量呈东南向西北地区逐渐递减的分布规律,降水量大都集中在夏季,主要降水量分布在东南部及雅鲁藏布江河谷农区及藏东农林区等,而整个青藏高原的西北部的大部分地区...     

A novel arterial pouch model of saccular aneurysm by concomitant elastase and collagenase digestion

Background: An ideal aneurysm model of cerebral aneurysm is of great importance for studying the pathogenesis of the lesion and testing new techniques for diagnosis and treatment. Several models have been created in rabbits and are now widely used in experimental studies; however, every model has certain intrinsic limitations. Here we report the development of a novel saccular aneurysm model in rabbits using an arterial pouch that is subject to in vitro pre-digestion with combined elastase and collagenase. Methods: A segment of right common carotid artery (CCA) was dissected out and treated with elastase (60 U/ml, 20 min) followed by type I collagenase (1 mg/ml, 15 min) in vitro. The graft was anastomosed to an arterial arch built with the left CCA and the remaining right CCA, while the other end of the graft was ligated. The dimension and tissue structure of the pouch were analysed immediately, 2 or 8 weeks after operation. Findings: Ten terminal aneurysms were produced. The gross mor-phology of the aneurysm resembles the human cerebral terminal aneurysms. We have observed the following pathological changes: (1) growth of the aneurysm (mean diameter increased from (2.0±0.1) to (3.2±0.3) mm at 2 weeks, P<0.001, n=7~10); (2) thinning of the aneurysmal wall (the mean wall thickness decreased to 44% at 2 weeks), which was accompanied by significant losses of elastic fibres, collagen and the cellular component; and (3) spontaneous rupture (3 out of 9, one aneurysm ruptured 24 h after operation with the other two at 2 and 4 weeks respectively). Conclusion: This rabbit arterial pouch model mimics human cerebral aneurysms in relation to morphology and histology. In particular, this model exhibited an increased tendency of spontaneous rupture.