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牛磺胆酸(Taurocholic acid TCA)是胆酸的羧基与牛磺酸的氨基以酰胺键相连的一种结合型胆汁酸。化学名称为3α,7α,12α-三羟基-5β-24胆烷酸-N-牛磺酸,分子式C23H36(OH)3CONHCH2CH2SO3H,分子量515.6,是胆汁类药物被牛利磺用胆的酸主常要以成分盐的。牛形磺式胆存酸在结,对构于式消如化下道。中脂类的消化吸收是必需的。药理实验表明,牛磺胆酸钠具有一定的镇咳、祛痰、平喘、抗炎、抑菌等作用[1]。由于牛磺胆酸为一种内源性物质,体内含量低,因此与干扰物质很难达到较好的分离。笔者等采用固相萃取结合反相高效液相色谱法(Re-versed… 相似文献
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胆汁酸是胆汁的重要活性成分，主要包括胆酸、去氧胆酸、牛黄鹅去氧胆酸、鹅去氧胆酸、熊去氧胆酸等多种成分，在动物脂肪代谢过程中发挥重要作用，具有抗炎、促进消化吸收、提高免疫力、保障肠道功能等多种生物学功能。胆汁酸作为一种新型的饲料添加剂，在水产养殖中发挥重要功效和作用。文章总结胆汁酸的生物学功能，综述胆汁酸在水产养殖生产中的应用，以期为胆汁酸进一步的开发与利用提供参考。 相似文献
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试验旨在从常见双歧杆菌筛选获得高活性胆盐水解酶的菌株并用于鸡胆汁酸的提制。从5种常见双歧杆菌菌株(两歧双歧杆菌、婴儿双歧杆菌、青春双歧杆菌、乳双歧杆菌、长双歧杆菌)中，通过平板Ca2+沉淀法及茚三酮法对活性双歧杆菌进行酶活评价，将高活性菌株的粗酶用于鸡胆汁酸的提制，使用薄层色谱法和高效液相法对所制胆汁酸进行定性和定量检测。结果显示：4种双歧杆菌(两歧双歧杆菌、婴儿双歧杆菌、青春双歧杆菌和乳双歧杆菌)对甘氨型和牛磺型鹅去氧胆酸均具有水解活性，婴儿双歧杆菌对甘氨鹅去氧胆酸和牛磺鹅去氧胆酸比酶活均显著高于其他3种双歧杆菌(P<0.05)，比酶活分别为0.48 U/mg和0.27 U/mg。酶法工艺提制鸡胆汁酸的得率为5.34%，提取物中鹅去氧胆酸(CDCA)含量为70.7%。结果表明：婴儿双歧杆菌具有高活性胆盐水解酶，酶法工艺提制鸡胆汁酸反应条件温和，提取物纯度较高，较为节能环保。 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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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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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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