分泌抗禽呼肠孤病毒单克隆抗体杂交瘤细胞株的建立与鉴定

采用腹腔的接种１次脾内注射禽呼肠孤病毒（ＡＲＶ）蛋白免疫小鼠，经３次融合后，共筛选８株分泌抗禽呼肠孤病毒（单克隆抗体杂交瘤细胞株，这８株ＭｃＡｂ均可与ＡＲＶＳ１１３３株，ＦＤＯ株发生反应，而与ＩＢＤＶ，ＭＤＶ，ＥＤＳ－７６病毒不发生反应，经亚类鉴定，ＡＥ７，ＡＦ８，ＢＤ１，ＤＨ１０，ＥＥ５为ＩｇＧ１；ＡＤ６，ＣＧ４为ＩｇＣ２ａ，ＡＧ７为ＩｇＧ２ｂ。腹水效价在１０＾３～１０＾５之间。     

分泌抗细粒棘球蚴原头节可溶性抗原单克隆抗体杂交瘤细胞株的建立

用ＳＰ２／０骨髓瘤细胞与以羊源细粒棘球蚴原头节可溶性抗原免疫的Ｂａｌｌ／ｃ鼠脾细胞融合，经克隆和筛选后获得８株分泌抗ＳＰＡ的杂交瘤细胞株，即３Ａ４，１ＩＣ２，２Ｂ３，２Ｃ２，２Ｅ３，３Ｅ６，３Ｆ１０和２Ｃ２。亚类鉴定为ＩｇＧ１（３Ａ４，３Ｅ６，１Ｃ２，３Ｆ１０和３Ｃ２），ＩｇＧ２ｂ（２Ｃ２），ＩｇＧ３（２Ｅ３），ＩｇＧ总（２Ｂ３）。免疫双扩散法显示２Ｃ２腹水及２Ｂ３，２Ｃ２，２Ｅ３培养上清粗提物与     

分泌抗鸡Ig单抗杂交瘤细胞系的建立与单抗生物学特性的鉴定

从传染性法氏囊病病毒（ＩＢＤＶ）单克隆抗体（ＭｃＡｂ）杂交瘤细胞系１Ｄ１０、１Ｇ１中得到了３株能稳定分泌抗鸡免疫球蛋白（Ｉｇ）ＭｃＡｂ的杂交瘤细胞系１Ｂ７、１Ｄ７、３Ｇ６。其抗体类和亚类均属ＩｇＧ２ｂ，腹水的ＥＬＩＳＡ效价≥１∶２５６００，琼扩效价为１∶８～１∶１６。３株ＭｃＡｂ能与鸡血清中的Ｉｇ出现沉淀反应，琼扩在２４ｈ以内出现清晰的沉淀线，而不能和鸭、鸽、鹌鹑等禽类及异种动物血清出现沉淀线。纯化的鸡ＩｇＧ、ＩｇＭ经ＳＤＳ－ＰＡＧＥ后，分别用纯化并经辣根过氧化物酶（ＨＰＲ）标记的１Ｂ７、１Ｄ７、３Ｇ６单抗酶结合物进行免疫印迹试验证明，３株单抗识别的均为ＩｇＧ、ＩｇＭ分子的轻链     

抗绵羊肺炎支原体单克隆抗体杂交瘤细胞株的建立

用绵羊肺炎支原体（ＭＯ）抗原免疫的ＢＡＬＢ／Ｃ小鼠，取血清抗体阳性免疫鼠的脾细胞与ＳＰ２／Ｏ细胞在聚乙二醇作用下进行融合，产生杂交瘤细胞、用间接ＥＬＩＳＡ法对杂交瘤细胞生长孔上清液进行检测，筛选阳性杂交瘤细胞株．以有限稀释法克隆１～２次，得到６株分泌抗绵羊肺炎支原体抗原的单克隆抗体（ＭｃＡｂ）杂交瘤细胞株．选择抗体分泌较高的１４Ａ６、７Ａ２７、Ｂ３８进行了较详细的研究，结果表明，其核内染色体数为９４～９６．抗体属性是：１株为ＩｇＧ２ａ、２株为ＩｇＧ１．用间接ＥＬＩＳＡ法对３株ＭｃＡｂ作符异性分析、该ＭｃＡｂ只特异地与绵羊肺炎支原体抗原发生反应，而不与猪肺炎支原体、山羊无乳症支原体抗原发生反应．将杂交瘤细胞注射ＢＡＬＢ／Ｃ小鼠诱生腹水．其抗体效价提高１００倍．杂交瘤细胞在液氮中保存１～２年后复苏仍能稳定地分泌抗绵羊肺炎支原体ＭｃＡｂ。     

抗鸡IgG重链单克隆抗体的制备与应用

以提纯鸡ＩｇＧ做抗原免疫Ｂａｌｌ／ｃ小鼠，取鼠细胞在ＰＥＧ１０００作用下与小鼠骨髓细胞（Ｓｐ２／ｏＡｇ１４）融合，采用间接免疫荧光（ＩＦＡ）和酶联免疫吸附试验（ＥＬＩＳＡ）检测上清抗体，阳性孔经有限稀法进行细胞克隆，共获得了７株分泌抗鸡ＩｇＧ单克隆抗体的杂交瘤细胞（２Ｈ８、４Ｄ８、４Ｄ８、１Ｂ７、２Ａ７、２Ｂ３、１Ｇ１２、３Ｄ１２）将这些细胞分别接种间系小鼠制备出腹水抗体，ＥＬＩＳＡ效价可达１０＾     

蓝舌病病毒单克隆抗体的制备及生物学特性鉴定

以纯化的蓝舌病病毒（ＢＴＶ）１１型ＶＰ７免疫ＢＡＬＢ／ｃ小鼠,动用淋巴细胞杂交瘤技术,借助间接ＥＬＩＳＡ筛选,获得了３株分泌抗ＢＴＶ１１ ＶＰ７的群特异性单克隆抗体（ＭｃＡｂ）的杂交瘤细胞株,命名为Ｃ１２Ｄ９、Ｂ４Ｆ３、Ｅ１Ａ７。这３株杂交瘤细胞株连续传代３个月再经液氮冻存６个月后复苏培养,仍能稳定分泌特异性ＭｃＡｂ。３株ＭｃＡｂ均具有ＥＬＩＳＡ特性和免疫沉淀特性,其中Ｃ１２Ｄ９株上清液的ＥＬＩＳ     

抗℃型肉毒毒素单克隆抗体的研究

用透村培养法制备的Ｃ型肉毒毒素的类毒素，免疫ＢＡＬＢ／Ｃ小鼠，取其脾细胞与小鼠骨髓瘤细胞系ＳＰ２／０融合。经ＨＡＴ选择培养基选择培养，其细胞融合率平均为７４．５％。用间按ＥＬＩＳＡ法筛选后，共获得９４孔产生抗Ｃ型肉毒毒素抗体的杂交瘤阳性孔。选其中１Ｃ２、１Ｄ１２、１Ｅ８、１Ｇ６、１Ｇ１１、２Ｂ１２、２Ｃ１１、２Ｅ１２、２Ｇ１１、２Ｈ３、３Ａ４、３Ｃ５、３Ｄ３、３Ｆ７、３Ｈ６共１５孔用有限稀释法进行     

分泌抗赭曲霉素A单克隆抗体杂交瘤细胞株的建立

用赭曲霉素Ａ（ＯＡ）－ＢＳＡ合成抗原免疫Ｂａｌｂ／ｃ小鼠，取免疫鼠脾细胞与ｓｐ２／０细胞融合，通过克隆和ＥＬＩＳＡ法筛选，建立三株泌抗ＯＡ单克隆抗体杂交瘤细胞株（３Ｃ１２，１Ｄ１２和２Ｇ７）。用间接ＥＬＩＳＡ法测定，细胞上清液抗体效价为１２８＾×（３Ｃ１２）和６４＾×（１Ｄ１２和２Ｇ７）腹水抗体效价为１０＾－７（３Ｃ１２，１Ｄ１２）和１０＾－６（２Ｇ７）。三株单抗（ＭｃＡｂ）均属ＩｇＧ类，分泌抗体     

分泌抗兔出血症病毒单抗杂交瘤细胞株的建立

以纯化的兔出血症病毒免疫ＢＡＬＢ／Ｃ鼠，应用杂交瘤技术获得了分泌抗ＲＨＤＶ单抗杂交瘤细胞１７株，其中有３株杂交瘤细胞分泌单抗的ＥＬＩＳＡ效价为１：４０９６００，１：４０９６；５株单抗具有血凝抑制活性。兔抗ＲＨＤＶ高兔血清对１７株ＭｃＡｂ的ＥＬＩＳＡ抑株为ＩｇＧ２ｂ。各株ＭｃＡｂ与欧洲棕色兔病病毒无抗原交叉反应，也无沉淀反应特性。     

鸡传染性喉气管炎病毒单克隆抗体的建立及其应用

应用鸡传染性喉气管炎病毒（ＩＬＴＶ）作免疫原建立了８株分泌抗ＩＬＴＶ单克隆抗体（ＭｃＡｂ）的杂交瘤细胞株。这８株ＭｃＡｂ均具有荧光抗体的特性，没有中和病毒的能力，分别属于ＩｇＧ２ａ，ＩｇＧ３和ＩｇＭ，应用异硫氰酸荧光素标记ＭｃＡｂ，建立了直接荧光抗体试验，用其检测ＩＬＴＶ抗原与分离病毒的符合率为９２．８％。     

商会自治的基石——商会自治规范研究

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。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

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。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

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.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

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。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

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。     

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.