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目的合成氨基脲人工抗原并制备其多克隆抗体。方法以氨基脲(SEM)和对醛基苯甲酸(CP)为原料合成半抗原(CP-SEM),并采用碳化二亚胺法和混合酸酐法将其分别与牛血清白蛋白(BSA)和鸡卵清蛋白(OVA)偶联,合成氨基脲人工抗原。以氨基脲人工抗原(CPSEM-BSA)为免疫原免疫Balb/c小鼠,利用间接ELISA法测定其抗体效价。结果经薄层层析、红外光谱和元素分析等方法鉴定合成半抗原即为CP-SEM。紫外扫描、聚丙烯酰胺凝胶电泳结果表明人工抗原合成成功。免疫获得抗氨基脲的多克隆抗体,其抗体效价为1:64000。结论氨基脲人工抗原合成成功,并获得抗氨基脲的多克隆抗体。 相似文献
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采用碳二亚胺(EDC)法将氟罗沙星(FLE)与载体蛋白BSA、OVA分别偶联合成人工抗原BSA-FLE、OVA-FLE,通过聚丙烯酰胺凝胶电泳法和紫外分析法对合成的人工抗原进行了鉴定。BSA-FLE用作免疫抗原免疫Balb/C小鼠,OVA-FLE用作检测抗原包被酶标板检测抗体效价。免疫小鼠的脾细胞与SP2/0细胞融合获得了5株(4F11、2C3、8G2、3C1、2G8)稳定分泌抗FLE抗体的杂交瘤细胞株,抗体亚型鉴定均为IgG1。将3C1接种小鼠制备腹水,用辛酸-硫酸铵法对腹水进行纯化,纯化后腹水效价1∶1 024 000。抗体分子量160.766 KD,亲和常数为8.57×108M-1。 相似文献
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马波沙星(MBF)是一种氟喹诺酮类抗菌药。本试验利用碳二亚胺法合成马波沙星免疫原和包被原,经紫外分光光度法、SDS-PAGE和免疫学方法,鉴定人工抗原合成成功。通过免疫小鼠和单克隆抗体技术,获得2株可分泌马波沙星抗体的杂交瘤细胞株(5G2和7H5),并将建筑细胞注入小鼠的腹腔内,获得腹水型单克隆抗体。经过纯化和ELISA鉴定,结果表明5G2株单克隆抗体的效价较高,达1.28×10^5,其单抗亚型是IgG2b,轻链是Kappa。经ELISA方法优化了最佳封闭液和抗原抗体的最佳工作浓度,当MBF药物浓度在100~5000pg/mL时,有良好的线性关系,线性方程y=0.3798x-0.6613,R^2=0.9872,IC50=1.029pg/mL,LOD=45.13pg/mL,LOQ=322.59pg/mL。 相似文献
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为了合成氯霉素(CAP)人工抗原并制备抗体,试验建立CAP残留的酶联免疫吸附试验(ELISA)法,采用重氮化法将半抗原CAP与牛血清白蛋白(BSA)进行偶联,制得免疫抗原,然后与卵清白蛋白(OVA)进行偶联,制得包被抗原,通过紫外光谱扫描鉴定是否偶联成功;用免疫抗原免疫KM小鼠,制备CAP多克隆抗体,并通过间接ELISA法测定抗体效价。结果表明:通过紫外光谱扫描,CAP-BSA在275 nm处为最大吸收峰,CAP-OVA在276 nm处为最大吸收峰;并且免疫KM小鼠得到的抗体效价高达1∶128 000。说明试验成功制备了CAP人工抗原,并且获得了高效价的多克隆抗体,也进一步证明了药物偶联成功。 相似文献
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建立多西环素人工抗原(Doxycycline,DOX)的合成及鉴定方法。采用戊二醛偶联法将DOX分别与载体牛血清白蛋白(BSA)及卵清蛋白(OVA)偶联制备免疫抗原(DOX-BSA)和包被抗原(DOX-OVA)。经SDS-PAGE电泳法、紫外可见吸收光谱鉴定,证实人工抗原成功合成,偶联比分别为8.6∶1和3.8∶1。结果表明建立了一种新的DOX抗原合成方法,为进一步制备特异性DOX抗体和建立检测食品中DOX的酶联免疫方法奠定了基础。 相似文献
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为了建立吲哚美辛(indomethacin,IDM)残留的免疫学检测方法,采用碳二亚胺法将载体蛋白牛血清白蛋白(BSA)和鸡卵清蛋白(OVA)分别与IDM偶联,人工合成免疫原(IDM-BSA)和包被原(IDM-OVA)。通过紫外分光光度法、SDS-PAGE、ELISA等方法鉴定人工抗原的合成效果;将IDM-BSA免疫小鼠,利用iELISA和icELISA来测定抗体血清效价。结果显示:IDM能与BSA和OVA成功偶联,通过免疫小鼠获得高效价的多克隆抗体,效价可达1∶6.4×10~4,半数抑制率为27.23 ng/mL。本研究结果为建立动物源性食品中IDM残留的免疫学检测方法奠定基础。 相似文献
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SMD单克隆抗体的制备及测定方法的建立 总被引：6，自引：0，他引：6
用戊二醛作为偶联剂 ,将磺胺对甲氧嘧啶 (SMD )与牛血清白蛋白 (BSA )或卵清蛋白 (OVA)偶联形成完全抗原 ,经紫外分光光度计扫描鉴定。以人工抗原免疫BALB/c小鼠 ,取脾细胞与骨髓瘤细胞 (SP2 /0 -Ag1 4)融合 ,用间接ELISA联合竞争ELISA法筛选出产生针对SMD抗体的杂交瘤细胞。经克隆 ,得到 3株特异性好的阳性杂交瘤细胞 ,注入小鼠腹腔产生腹水。建立了测定SMD的ELISA法 ,其检测下限小于5ng/mL。 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