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本试验建立三七总皂苷渗透泵控释片质量标准,采用薄层色谱法鉴别人参皂苷Rb.和人参皂苷Rg,,采用高效液相色谱法测定对三七皂苷R1、人参皂苷Rg1和人参皂苷Rb1进行含量测定.试验结果:在薄层色谱中检出了人参皂苷Rb1和人参皂苷Rg1;在高效液相色谱中,三七皂苷R1平均回收率为99.9%(n=9),RSD为1.00%,人参皂苷Rg1平均回收率为99.9%(n=9),RSD为0.8 3%,人参皂苷Rb1平均回收率为99.4%(n=9),RSD为0.76%.试验表明该鉴别方法专属性强,含量测定方法简便、准确,可有效控制三七总皂苷渗透泵控释片的质量. 相似文献
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人参总皂苷对MSB-1细胞的增殖抑制作用及其机理初探 总被引：1，自引：0，他引：1
以不同浓度的人参总皂苷与马立克氏病肿瘤细胞系MSB-1细胞共同作用,利用改良MTT法测定了人参总皂苷对MSB-1细胞的增殖抑制作用,并通过琼脂糖凝胶电泳、流式细胞术、荧光检测和电镜形态学观察等方法探讨其抑制机理。实验结果表明:人参总皂苷对MSB-1细胞的增殖存在抑制作用,并呈剂量-时间依赖性,人参总皂苷与MSB-1细胞培养72 h后的半数抑制浓度为:340.41μg/mL,其95%可信限为:(340.41±33.7)μg/mL。流式细胞术测定表明,人参总皂苷抑制了MSB-1细胞DNA的合成。琼脂糖凝胶电泳分析、荧光检测和透射电镜观察表明,人参总皂苷可以诱导部分MSB-1细胞发生凋亡。 相似文献
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为了探讨乌龙茶多糖、多酚对肝癌细胞HepG2细胞增殖及细胞周期的影响,以及两者联合使用对肝癌细胞HepG2协同杀伤抑制作用,通过四氮甲唑蓝(MTT)试验检测细胞的增殖抑制率,以观察乌龙茶多糖、多酚对肝癌细胞HepG2的增殖抑制作用;应用流式细胞仪检测细胞凋亡率。结果表明,乌龙茶多糖、多酚可以抑制肝癌细胞HepG2的生长、增殖;二者联合应用对肝癌细胞HepG2的杀伤作用显著强于2种药物单独使用,且经药物联合应用处理后的肝癌细胞HepG2的凋亡率要高于2种药物单独使用。说明乌龙茶多糖、多酚对肝癌细胞HepG2具有杀伤作用,乌龙茶多糖与多酚联合使用具有协同抗肿瘤的作用。 相似文献
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《中兽医医药杂志》2019,(5)
目的:建立红参川贝咳喘丸的质量控制方法。方法:对红参川贝咳喘丸中红参、川贝母采用薄层色谱方法(TLC)进行定性鉴别;红参川贝咳喘丸君药红参中人参皂苷Re、人参皂苷Rf、人参皂苷Rb1的含量采用高效液相色谱方法进行(HPLC)检测。结果:建立的TLC定性鉴别方法斑点清晰,具有极好的分离度,阴性无干扰;HPLC测定人参皂苷Re、人参皂苷Rf、人参皂苷Rb1分别在12.08～193.2μg/mL、12.63～202.1μg/mL、12.6～201.6μg/mL范围内呈良好的线性关系,R~2值分别为0.999 6、0.999 6、0.998 4,平均加样回收率分别为97.01%、96.98%、98.31%,RSD分别为0.64%、1.15%、1.24%。结论:该研究方法简便易操作,专属性强,结果准确,能够对红参川贝咳喘丸的质量进行控制。 相似文献
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《中国兽医学报》2019,(11):2215-2221
将96只SPF母鸡随机分成4组,1,4组注射生理盐水;2,3组连续3 d肌肉注射环磷酰胺(Cy)诱导免疫抑制。3组在Cy引起免疫抑制后连续7 d每天饮水口服1 mg/kg人参皂甙Rg1,其余组只饮水。1,2,3组于给药结束后免疫传染性法氏囊病毒(IBDV)疫苗,4组不免疫。于给药前和免疫后1,2,3周计算脾脏和法氏囊指数,采血测定抗体阳性率,检测十二指肠灌洗液总sIgA和特异性sIgA含量;观察十二指肠黏膜上皮内淋巴细胞(IELs)以及IgA+细胞数。于免疫后1周提取十二指肠总RNA,检测肠组织免疫相关基因mRNA的表达。结果表明,和免疫抑制组相比,饮水口服1 mg/kg人参皂苷Rg1可提高IBDV抗体阳性率,显著增加脾脏和法氏囊指数,显著提高肠道总sIgA和特异性sIgA含量;此外,口服Rg1显著增加了十二指肠IELs和固有层IgA+细胞数量,上调了鸡十二指肠TLR4、p65、TGF-β、pIgR和CCR9基因的mRNA表达水平。 相似文献
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三七总皂苷含有人参皂苷Rb1、Rb2、Rc、Rd、Re及三七皂苷R1、R2、R3、R4、R6等20多种皂苷成分,其中人参皂苷Re、Rb1、Rg1及三七皂苷R．含量最高。阎萍等对三七总皂苷的研究中,将Rb1、Rg1及R1三种单体皂苷进行了分离。通过实验发现,人参皂苷Re、Rb1、Rg1及三七皂苷R14种单体皂苷相互之间分离条件要求较高。笔者在此基础上对其分离条件进行了研究,利用薄层色谱与高效液相考察了4种皂苷的分离条件,为中药三七提取物制剂质量控制提供依据。 相似文献
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三七总皂苷含有人参皂苷Rb1、Rb2、Rc、Rd、Re及三七皂苷R1、R2、R3、R4、R6等20多种皂苷成分,其中人参皂苷Re、Rb1、Rg1及三七皂苷R.含量最高. 相似文献
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以不同质量浓度的人参皂苷Rh2与马立克氏病肿瘤细胞系MSB-1细胞共同作用,利用改良MTT法测定了人参皂苷Rh2对MSB-1细胞的增殖抑制作用,并通过流式细胞术、荧光检测和电镜形态学观察等方法探讨其抑制机理.结果显示:人参皂苷Rh2对MSB-1细胞的增殖存在押制作用,并呈剂量依赖性,人参皂苷Rh2与MSB-1细胞培养72 h后的半敷抑制质量浓度为0.65 mg/L;流式细胞术测定表明,人参皂苷Rh2可阻滞MSB-1细胞于S期;荧光检测和透射电镜观察表明,人参皂苷Rh2可以诱导部分MSB-1细胞发生凋亡. 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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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
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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