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儿童学是家庭学科中的一小部分内容,目前本内容已开设2次,在"生活科学"课中.由于是探索阶段,课时较少,为8节-10节,学习对象为女性学大4学生.教学内容包括关于儿童的概述,儿童与家庭生活,创造安全环境,有针对性的预防以及及时处理意外伤害,影响儿童发展的因素,学前儿童健康,儿童安全问题,儿童受虐待问题(来自家庭、社会等方面暴力),儿童的性别教育以及教育资源不平等问题(农民工子女受教育问题、偏远山区儿童受教育问题、特殊需要儿童受教育问题等).文章将课程开展情况以及教学过程中出现的问题进行探讨、反思. 相似文献
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哺乳仔猪和个体仔猪平均生产成活率的高低,是直接影响我国整体养猪业稳定快速发展的重要衡量因素之一,它是养猪企业用来衡量我国全体专业养猪户生产生活质量综合水平的一个重要标准指标,这一标准指标直接影响到我国全体专业养猪户的生产社会性和经济效益.但在我国大型养猪场和生产企业发展的过程中,相当一部分专业养猪场的养殖生产大户对于在哺乳期内的各种仔猪养殖缺乏科学化的饲养技术,再加上进入哺乳期对于各种仔猪自身各种生理环境影响条件及自然环境影响因素的双重影响,使得哺乳期的仔猪死亡率比较高,给养殖户和生产经营企业带来了严重损失. 相似文献
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幼儿教育是我国社会主义教育事业的重要组成部分,幼儿园应是儿童的乐园,游戏应该成为它的基本活动。儿童心理学家朱智贤认为：“游戏之所以是学前儿童的主导活动,是和游戏本身的性质以及它在学前儿童身心发展上的作用分不开的,通过这种活动,儿童身心发展上的许多变化就能更好地产生和形成。游戏是适合与学前儿童特点的一种独特的活动形式。” 相似文献
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《中国畜牧兽医文摘》2012,(11)
<正>面对农村劳动力转移规模和速度不断增加,"386199"(指妇女、儿童、老人)部队在农村成为主力,劳动力缺乏逐渐成为制约山区农业产业化发展的重要因素。黔江区在发展地方经济过程中,找准产业发展与农村劳动力资源结合点,"错位"发展土蛋鸡养殖,凸显产业特色,发展50～200羽土蛋鸡养殖户30000户,饲养土蛋鸡4000000余羽,带动30000户实现增收致富。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
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。 相似文献
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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。 相似文献
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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. 相似文献
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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. 相似文献
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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。 相似文献