Comparative pharmacokinetics of three triterpene acids in rat plasma after oral administration of Poria extract and its formulated herbal preparation: GuiZhi-FuLing capsule     

Xiao F  Li Q  Liang K  Zhao L  He B  Ji W  Chen X  Wang Z  Bi K  Jia Y 《Fitoterapia》2012,83(1):117-124

A sensitive liquid chromatographic-mass spectrometric technique coupled with liquid-liquid extraction method was developed and validated for simultaneous determination of dehydro-tumulosic acid, tumulosic acid and polyporic acid C in rat plasma. The analytes were separated on a Kromasil C₁₈ column with a total running time of 12.5 min. Author had compared the pharmacokinetics of dehydro-tumulosic acid, tumulosic acid and polyporic acid C after oral administration of the extract of Poria and its formulated herbal preparation (GuiZhi-FuLing capsule). The improved pharmacokinetic profiles of the three compounds were found in the GuiZhi-FuLing capsule, indicating the more effective absorption and the slower elimination, compared with the Poria extract. Furthermore, this study revealed that as far as the Poria extract was concerned, it is very valuable to be used as a clinical instruction of GF capsule.  相似文献   

8味中药对奶牛乳房炎病原菌的体外抑菌试验     

郭庆  朱伟  易琼  何炳坤  徐宾朋  王鲁 《中国兽医杂志》2012,48(5):63-65

选用金银花、连翘、蒲公英等8味中药分别采用乙醇回流法进行提取,用试管二倍稀释法测定来自奶牛乳房炎的3种主要致病菌(金黄色葡萄球菌、无乳链球菌、停乳链球菌)的最低抑菌浓度(MIC)和最低杀菌浓度(MBC)。结果显示,以金银花和连翘对金黄色葡萄球菌抑菌效果最强,MIC值均为15.63mg/mL,其MBC值为31.25mg/mL和62.5mg/mL;芙蓉花对大肠杆菌和无乳链球菌的效果最强,MIC值为31.25mg/mL和15.63mg/mL,MBC值为62.5mg/mL。本试验结果,对临床用药选取合适的中药有直接的指导意义,同时为体内用药的浓度提供参考依据。  相似文献   

饲粮添加海南霉素和莫能菌素对奶牛瘤胃发酵特性和氮平衡的影响     

王志博  姜万富  辛杭书  段春宇  李富国  姚庆  刘震  张永根 《动物营养学报》2012,24(6):1098-1104

本研究旨在探究饲粮添加海南霉素和莫能菌素对奶牛瘤胃发酵特性和氮平衡的影响.选用3头体重为(460.0±20.6)kg、装有永久性瘤胃瘘管的成年荷斯坦奶牛,采用3×3拉丁方试验设计,对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮添加20 mg/d海南霉素和350 mg/d莫能菌素的试验饲粮.结果表明:饲粮添加海南霉素和莫能菌素没有显著影响瘤胃液pH和丁酸含量(P＞0.05),但显著降低了瘤胃液总挥发性脂肪酸浓度、乙酸含量、乙酸/丙酸和氨态氮浓度(P＜0.05).与对照组相比,海南霉素组和莫能菌素组丙酸含量分别提高了16.26％和15.79％(P ＜0.01).饲粮添加海南霉素和莫能菌素显著降低了尿囊素排出量、尿嘌呤衍生物排出量和微生物氮产量(P＜0.05).饲粮添加海南霉素和莫能菌素也降低了粪氮量和尿氮量(P＜0.05),提高了沉积氮量(P＜0.01).与对照组相比,海南霉素组和莫能菌素组的表观氮消化率分别提高了5.61％和7.05％(P =0.03).总之,与莫能菌素相似,饲粮添加海南霉素可以改变瘤胃发酵模式,使其更趋向于丙酸型发酵,并且能够提高氮利用效率.  相似文献   

犊牛大肠杆菌病病原的分离鉴定     

尚婷婷  张耀相  林青  朱磊 《动物医学进展》2012,33(6):143-146

从陕西杨凌某发病牛场采取腹泻犊牛病料5份,经微生物学诊断,从中分离出革兰阴性疑似致病菌6株。经生物学特性和生理生化试验鉴定,6株分离菌均为致病性大肠埃希菌。对分离菌进行抗生素敏感性试验,结果表明,该致病菌对氯霉素、菌必治、氧氟沙星、阿米卡星及卡那霉素等高度敏感;对妥布霉素、呋喃妥因和复达欣等中度敏感,对链霉素、庆大霉素、利福平、复方新诺明、四环素及红霉素等有较强的耐药性。动物致病性试验结果表明,该菌对小鼠有强致病性。  相似文献   

鸭Ⅰ型肝炎病毒RT-LAMP可视化检测方法的建立     

谢丽基  谢芝勋  刘加波  庞耀珊  邓显文  谢志勤  范晴 《中国预防兽医学报》2012,34(2):112-115

为建立一种快速检测鸭Ⅰ型肝炎病毒(DHV I)的方法,本研究根据基因库中DHV Ⅰ基因的保守序列,设计特异性环介导等温扩增(LAMP)引物,建立了DHV I的RT-LAMP可视化检测方法。该方法的敏感性可达10fg,高于常规PCR方法 100倍;全部反应可在1 h内完成;可以通过肉眼观察颜色直接判定结果;对其它鸭常见病原体的检测结果均为阴性。实验结果表明建立的RT-LAMP方法简便、快速、灵敏、特异,可用于DHV Ⅰ感染的快速检测。  相似文献   

外源激素对掌叶大黄愈伤组织诱导及种苗生根的影响     

晋昕  崔蕾  王瑞新  王清 《草原与草坪》2012,32(3):32-36

以掌叶大黄无菌苗为材料,研究不同外源激素浓度及配比对试管苗生根、愈伤组织诱导及增殖的影响。结果表明:掌叶大黄的根、茎、叶均可作为诱导愈伤组织的材料。2,4-D诱导愈伤组织的能力明显高于NAA,以2～3mg/L 2,4-D的诱导频率较高为87.93%～93.11%,诱导愈伤组织的适宜培养基为MS+2mg/L NAA+2mg/L 2,4-D+2mg/L 6-BA;6-BA对愈伤组织诱导频率无直接影响,但明显影响愈伤组织的增长量及生长状态。愈伤组织继代增殖以MS+0.5mg/L 2,4-D+1mg/L NAA+1mg/L 6-BA最好;MS+0.5mg/L IBA适宜于试管苗生根。  相似文献   

Effects of porcine circovirus type 2 on expression of mRNA associated with endogenous antigen processing and presentation in pulmonary alveolar macrophages and circulating T lymphocytes in piglets   总被引：1，自引：0，他引：1  

Li J  Yu Q  Nie X  Guo X  Song Q  Li H 《Veterinary journal (London, England : 1997)》2012,193(1):199-205

  相似文献   

延边朝鲜族自治州野生动物资源及管理对策     

于庆  王思丹  刘铁柱  孙田东  丁博志 《吉林林业科技》2012,(5):35-38

本文对延边朝鲜族自治州区内野生动物种类、分类地位以及野生动物保护现状、取得的成就与存在问题进行了评价,并提出了今后加强野生动物资源保护的对策。  相似文献   

低聚木糖在猪生产中的应用     

聂昌林  宋春阳 《中国饲料》2012,(16):34-35,38

本文就低聚木糖的生物学特性及其在猪生产中的应用作一综述。  相似文献   

A comparison on DNA methylation levels in bamboo at five developmental stages     

Yong-quan Lu  Dong-mei Wang  Hai-ying Li  Qing Jia  Ze Wu  Wen-feng Lu 《林业研究》2012,23(1):157-159

Bamboo shoots grow quickly through the rapid elongation of internodes. In order to verify whether DNA methylation affects bamboo shoot elongation, we compared DNA methylation levels at five developmental stages of bamboo (Phyllostachys praecox), including young bamboo shoot of 40-cm at length (S1), bamboo shoot of 2-cm at length (S2), young leaf (Y1), leaf (Y2), and aging leaf (M), by using amplified fragment length polymorphism (AFLP) based on KpnI/MseI and Acc65I/MseI platforms. The polymorphism ratio of methylated to unmethylated DNA sites in bamboo shoot (S1 and S2) was higher than that in leaf (Y1, Y2 and M). The polymorphism ratio of methylated to unmethylated DNA sites in S2 was highest (32%). Our results suggest that DNA methylation changed greatly at bamboo growing stages, especially in stage of rapid elongation of internodes.  相似文献