《猪生产学》课程教学改革与创新研究

《猪生产学》是动物科学专业的重要专业课之一。本文主要探讨了《猪生产学》课程的教学内容、教学改革原则以及教学中存在的问题,从教学内容改革、教学方法改革和加强师资队伍的培养等方面入手,提出了《猪生产学》课程改革的措施。通过这些实施改革措施,旨在培养适应现代化、集约化、自动化的和信息化养猪生产的高素质专业人才。     

提高猪生产学课程教学质量的探索

结合目前健康、生态、集约化养猪形势对专业人才的要求和多年来课程组开展猪生产学教学的经验,文章从优化教学内容、改革教学手段和教学方法等入手,围绕猪生产学理论课与实践课本科教学,探索提高猪生产学课程教学质量的改革措施,旨在专业课程教学中激发学生求知与创新意识,提高实践操作能力和国际交流能力,培养创新和创业型人才。     

彭学群的创业情怀

1992年,年仅20岁的彭学群从山东省牧校毕业后分配到大店镇兽医站工作.适逢全县科学养猪技术全面普及,生猪生产高涨之际,他一边系统地学习<动物营养学>、<饲料生产学>、<养猪学>等课程,一边着手开始了猪用饲料添加剂的研制工作.     

《牧草栽培学》课程整体教学改革与实践

通过时<牧草栽培学>课程教学内容、教学方法、教学手段和教学实习等方面的投入和研究,提出了完整的<牧草栽培学>教学体系和改革方案.进而提高<牧草栽培学>的课堂教学质量.     

《猪生产学》课程存在的问题及其改革历程

针对《猪生产学》课程在教学过程中存在的理论与实践相脱节、学生学习积极性差、毕业生不能满足社会需求等问题,分析其产生原因,综述了其教学内容、教学方法、考核方式等方面的改革历程,以期为构建满足社会需求的《猪生产学》课程体系提供参考。     

动物科学专业《猪生产学》课程理论与实践教学改革探讨

围绕动物科学本科专业培养要求和《猪生产学》课程性质,就理论教学与实践教学内容、方法及教学体系建设进行了探讨,旨在推动《猪生产学》教学改革,提高课程授课效果,为培养实用型专业技术人才服务。     

《牛生产学》教学存在问题与改革建议

《牛生产学》是我国高等院校动物科学专业开设的必修课之一,与《猪生产学》、《羊生产学》和《家禽生产学》并称动科专业“四大养”,是一门实践性很强的课程。为了转变学生对本门课程的传统认知观念,激发学生的学习兴趣,深入浅出地将书本上的理论知识与牛生产实践紧密地结合在一起,笔者通过近两年的课程教学,尝试了对教学内容、教学手段和考评方式等方面的改革,收到了较好的教学效果,为该课程的教学改革提供了参考价值。     

“养猪与猪病防治”课程的改革与实践

为了适应高职高专教学发展的趋势与要求,河北保定职业技术学院对养猪与猪病防治课程的教学内容、教学方法进行了改革与实践,重点是优化教学内容、加强校企合作,通过工学结合构建了基于养猪生产工作过程的项目化实践教学模式,实现了岗位轮动,教、学、做一体化,培养了一大批社会需要的高素质实用人才。     

基于工作过程的《鸡生产与疾病防治》课程开发

基于工作过程是为了营造出"学习的内容是工作,通过工作实现学习"的氛围,使学生在职业活动中实现"教、学、做"一体化与职业态度养成合一.介绍了基于工作过程的<鸡生产与疾痛防治>课程开发,对课程教学内容、教学设计和教学方法进行了阐述.     

《家畜环境卫生学》的课程建设

<家畜环境卫生学>作为一门必修课,是动物科学专业、动物医学专业的专业基础课.一门课程的课程建设目标就是将其建设成为精品课程,这就要求<家畜环境卫生学_>在课程建设过程中应按精品课程的要求,紧紧围绕师资队伍、教学内容、教学方法与手段、教材、教学管理等方面进行完善,最终实现教学内容科学、教学方法与手段合理,教材先进,教学管理高效,师资队伍高素质的建设目标.     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

商会自治的基石——商会自治规范研究

在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。     

猪毛色遗传的研究进展

本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

乳酸杆菌作为益生菌广泛用于人和动物。本文综述了乳酸杆菌改善宿主健康的机制。乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道。文章重点讨论了乳酸杆菌表面成分（表面蛋白、脂磷壁酸和肽聚糖）与肠道受体（Ｃ型凝集素受体、Ｔｏｌｌ样受体和 Ｎｏｄ样受体）,阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制。     

Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF

Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo.