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浅谈中药微粉的开发应用及存在问题 总被引:3,自引:0,他引:3
平星 《兽药与饲料添加剂》2004,9(4):30-32
分析了当前中药的应用情况及中药应用微粉化技术的情况,从中药传统理论、中药有效成份提取、中药成份化学等多方面阐述了中药微粉化的优势;讨论了目前微粉中药生产、研究中存在的有关概念和术语混乱、微粉尺度缺乏明确界定、研究中出现的问题等情况;提出需加强中药微粉的规范化研究,推动微粉中药的研究应用进程。 相似文献
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中药及中兽医研究现状由于中药在现代畜牧业生产中的应用有巨大优势和广阔前景,激发了众多科研人员对中药在生产中应用的研究。一、中药功能以及在现代畜牧业生产中应用研究中药的功能研究主要是对中药或中药某一成分所具备的功能进行研究,科研人员对中药单项成分功能研究也取得不少成果,如胡廷俊报道对锁定为生命奥秘的三类生物大分子(蛋白质、核酸、多糖)之一的多糖进行研究,已取得突破进展。中药在畜牧业生产中应用研究开展的比较广泛,甚至还有更深层应用研究,利用以中草药中分离出多糖作为免疫调节或增强剂,以提高畜禽疫(菌)苗的免疫保… 相似文献
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在兽医临床领域应用到了很多中药,各种不同种类的中药具有提高机体免疫力、抗真菌、抗病毒、抗细菌的作用,在兽医临床中应用合适的中药往往能够取得良好的治疗效果。对中药在兽医临床中的应用研究进行了综述,并探讨了中药在兽医临床中的应用前景。 相似文献
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纳米技术在中药研究中的应用进展 总被引:2,自引:0,他引:2
纳米技术是在纳米尺度下对物质进行制备、研究和工业化,以及利用纳米尺度物质进行交叉研究和工业化的综合性研究体系。中药产生的药理作用不完全归功于该药物特有的化学组成,还应该与药物的物理状态(如颗粒大小)密切相关,通过将纳米技术引入现代中药的研究开发,可以扩展中药的理论和实践研究,扩大中药的应用范围。通过对近年来纳米技术在中药研究中的应用进行综述,介绍了纳米技术应用于中药研究领域的发展状况,重点从纳米中药的特点、类型、制备技术、研究方向、研究中面临的问题等方面进行了系统论述。 相似文献
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《动物医学进展》2021,42(1)
微生物发酵是中药的一种传统炮制方法,随着现代发酵技术的发展,微生物发酵中药的研究更加深入,应用更加广泛。微生物发酵中药具有提高中药活性成分的利用率、增强中药药效、降低中药毒副作用、节省药材资源,保护生态环境等优点。同时,微生物发酵中药也存在一些尚未解决的问题,如发酵机理不明确、生产标准不规范等,因此,该领域潜在研究价值较大。影响微生物发酵中药的因素众多,如优良菌种的选择,中药材的甄选以及发酵工艺的控制等。发酵中药在动物生产上应用广泛,效果明显,是未来抗生素的重要替代品。论文对微生物发酵中药的相关内容进行阐述,为该领域的深入研究及产品开发提供理论参考。 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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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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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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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. 相似文献
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家兔作为一种实验动物 ,推动了繁殖技术的发展。本试验通过对不同年龄公獭兔的睾丸进行组织学观察、测定 ,研究精子的发生规律 ,为系统地进行繁殖生理工作提供依据。1 材料与方法选 60日龄、75日龄、90日龄 3个年龄公獭兔各5只 ,用外科手术法摘取两侧睾丸 ,放入 Bouin氏液中固定 ,二甲苯透明 ,石蜡包埋 ,切成 5~ 8μm切片 ,H.E.染色。在显微镜下观察 ,并进行定量组织学指标测定及差异性比较。2 结果和讨论2 .1 睾丸定量组织学指标的测定结果 见表 1。表 1 獭兔睾丸定量组织学指标 μm,个 /精细管60日龄 75日龄 90日龄曲细精管… 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
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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