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黄芪免疫调节作用研究进展 总被引：2，自引：0，他引：2
黄芪为蒙古黄芪[Astragalus membranaceus（Fisch．）Bge．var．mongholicus（Bg—e．）Hsiao]或膜荚黄芪[Astragalusmemb—ranaceus（Fisch．）Bge．]的干燥根,在我国主要分布于东北和华北,在传统医学中有着广泛的应用。其性甘、微温,归脾、肺经,具有补气升阳、益卫固表、托毒生肌、利水退肿之功效。近年来研究发现黄芪含有多种生物活性成分,如多糖、 相似文献
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黄芪又名锦黄耆、独根、二人抬,为豆科紫云英属植物膜荚黄芪（Astragalusmembranaceus（fisch）bunge）及内蒙古黄芪（A．mongholicusbunge）的十燥根,具有补气固表,利尿排毒,排脓,敛疮生肌的功效,为历代常用的补益中药。黄芪主产于甘肃、内蒙、陕西、河北及东北、西藏等地。黄蓖味甘,性... 相似文献
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黄芪在养禽业中的应用 总被引：1，自引：0，他引：1
黄芪为豆科植物荚黄芪（Astragalus membranaceus Bge）和蒙古黄芪[Astragalus membranaceus Bge．Var．monhokicus（Bge）Hsiao]的干燥根。传统中医认为：黄芪性温味甘,人肺、归脾经,具有补气升阳,固表止汗,脱毒排脓,利水消肿和生肌等功效,是临床上最常用的补气药物之一。现代中医研究证实：黄芪可以双向调节机体免疫功能,促进免疫细胞产生干扰素,延缓细胞衰老,抗菌作用及抗疲劳,增强机体的适应性和抗病力等作用。在人医临床上用于抗癌、防癌,消除慢性炎症,并可起到延年益寿之作用;在养禽业黄芪不仅作为促生长饲料添加剂,还可以增强机体免疫力、防治疾病、抗应激等作用。 相似文献
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黄芪为豆科植物蒙古黄芪〔Astragalus memeranaceus(Fisch.)Bge.Var.mongholicus(Bge.)Hsiao〕或膜夹黄芪〔A.membranaceus(Fisch.)Bge.〕的根。黄芪是历代常用的补益中药,具有健脾补中,升阳举陷,益卫固表,利尿,托毒生肌之功效。黄芪的主要化学成分为单糖、多糖、皂苷、黄酮、多种氨基酸及微量元素,其中最重要的是多糖类、皂苷类、黄酮类三种活性成分[1]。近年来的研究表明,黄芪多糖能增强机体的淋巴细胞、巨噬细胞和中性细胞的活化、吞噬能力,增强机体的非特异性抵抗能力,增加白细胞数量,减少病毒的致病性;黄芪皂苷具有降压抗炎、镇静… 相似文献
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中药黄芪在中医临床组方中极为常用,其以蒙古黄芪(astragalus mongholicus Bge)和膜荚黄芪(astragalus membranaceus Bge)的根为正品。黄芪含有多糖、皂苷、黄酮、氨基酸、亚油酸、生物碱、多种矿物质及维生素等化学成分。中药药理研究结果表明,黄芪具有提高免疫系统功能、抗病 相似文献
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前人研究认为膜荚黄芪（Astragalus membranaceus（Fisch.）Bge.）与蒙古黄芪（Astragalus membranaceus（Fisch.）Bge.var.mongholicus （Bge.）Hsiao）染色体数目为2n=16。本试验采用根尖染色体常规制片方法,观察了膜荚黄芪与蒙古黄芪种子根尖有丝分裂相。结果显示：膜荚黄芪与蒙古黄芪染色体数目为2n=18,这2种植物各有4条小染色体。膜荚黄芪染色体核型公式为K（2n）=2x=18=4sm+14m,核型类型为2B型。蒙古黄芪染色体核型公式为K（2n）=2x=18=6sm+12m,核型类型为2C型。 相似文献
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黄芪又名锦黄耆、独根、二人抬,为豆科紫云英属植物膜荚黄芪及内蒙古黄芪的根,主要功效:补气固表、利尿脱毒、排脓、敛疮生肌,为历代常用的补益中药。其主要成分为2,4-二羟基-5,6-二甲氧基异黄酮、胆碱、甜菜碱、氨基酸、蔗糖、葡萄糖醛酸及微量元素。内蒙古黄芪含有β-谷甾醇、亚油酸及亚麻酸[1]。近年来研究发现,黄芪中除黄芪甲甙、黄酮等小分子化合物具有较强的生物活性外,大分子化合 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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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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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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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