聚乙酸乙烯酯乳液胶的改性

本文介绍了用该改性乳液胶合的贴面胶合板的性能改性聚乙酸乙烯酯共聚乳液胶粘剂的聚合工艺，经过改性的乳液胶具有良好的耐水性，达到并超过日本二类特种合板标准，且生产工艺简单，原料易得，成本与普通乙酸乙烯酯均聚液接近,具有较强的实用性。     

苯酚在兽医生物制品检测中的应用

作者们发现可以用低浓度苯酚作为破乳剂将油乳剂疫苗中水相分离出来,利用后者在体外进行免疫学测定。应用这个方法发现市售减蛋综合症疫苗中的血凝价为２１０,市售卵黄抗体中新城疫病毒血凝抑制价和抗法氏囊病病毒抗体价分别为２７～２９和２５～２７。     

一株鸡新城疫病毒的分离鉴定及其油乳剂灭活苗免疫效果评价

从河南某种鸡场发病鸡群中分离出1株毒株,经HA、HI和动物回归试验,确定分离的病毒为NDV,命名为HNYD株。经过测定,HNYD株鸡胚半数致死量（ELD50）为10^90/0．1mL;鸡胚最小致死量的平均致死时间（MDT）为53．8h;对1日龄SPF雏鸡脑内致病指数（ICPI）为1．86,提示HNYD株为强毒力株。血清交叉反应试验显示HNYD株和La Sota株存在一定的抗原性差异。用HNYD株油乳剂灭活苗对HNYD株和La Sota株的保护率分别为90％和100％,明显优于La Sota株油乳剂灭活苗,提示HNYD株制备的疫苗对流行毒株和经典毒株的攻击均能很好的保护。     

氟苯尼考混悬型微乳剂的急性毒性试验

为评价氟苯尼考混悬型微乳剂的安全性,按改良寇氏法进行了氟苯尼考混悬型微乳剂的急性毒性试验。根据预实验结果,60只小鼠平均分为6组,雌雄各半,分别按6000、4558.5、3464、2632、2000 mg/kg氟苯尼考混悬型微乳剂和0.5 mL/kg生理盐水注射液给小鼠腹腔一次性注射,同时用氟苯尼考普通注射液做对照,重复上述试验,均连续观察7 d。结果显示：氟苯尼考混悬型微乳剂最大耐受量为6000 mg/kg,其LD50为3658.8 mg/kg,LD5095%可信限为2075.8～5241.8 mg/kg。氟苯尼考注射液的LD50为636.68 mg/kg,LD5095%可信限为538.5～735.1 mg/kg。此剂量氟苯尼考混悬型微乳剂中氟苯尼考的含量相当于临床推荐用量（20 mg/kg）的180倍,表明氟苯尼考混悬型微乳剂毒性显著降低,在治疗剂量范围内使用安全。     

鸡新城疫-传染性支气管炎-减蛋综合征三联油乳剂苗的研制及应用

用新城疫病毒（克隆H88株。）、传染性支气管炎病毒（JP株和H52株）和减蛋综合征病毒（H91株）分别接种于鸡胚和鸭胚,并收取其含毒鸡、鸭胚尿囊液,用一定浓度甲醛溶液灭活,按一定比例混匀,以7号白油为佐剂制成鸡新城疫（ND）－传染性支气管炎（IB）－减蛋综合征（EDS76）三联油乳剂灭活苗（三联苗）。三联苗免疫30日龄雏鸡,免疫后7天产生免疫应答,免疫后21天保护率达100％。疫苗在4℃～8℃保存期为12个月,10℃～25℃保存期为6月,该疫苗在全省不同地区鸡群应用400余万羽份,取得满意效果。     

复相乳化法制备明胶微囊蛋氨酸的工艺初探

以明胶和羧甲基纤维素钠为包囊材料,蛋氨酸为芯材采用复相乳化法制备蛋氨酸微胶囊。应用均匀实验设计分析了微胶囊制备过程主要影响因素及适宜的工艺条件,得出明胶溶液浓度对微囊的形成影响较大,优化参数得出蛋氨酸微胶囊载药量为61.30%。     

Molecular identification of the vaccine strain from the inactivated oil emulsion H9N2 low pathogenic avian influenza vaccine

In order to control the H9N2 subtype low pathogenic avian influenza (LPAI), an inactivated vaccine has been used in Korea since 2007. The Korean veterinary authority permitted the use of a single H9N2 LPAI vaccine strain to simplify the evolution of the circulating virus due to the immune pressure caused by the vaccine use. It is therefore important to determine the suitability of the vaccine strain in the final inactivated oil emulsion LPAI vaccine. In this study, we applied molecular rather than biological methods to verify the suitability of the vaccine strain used in commercial vaccines and successfully identified the strain by comparing the nucleotide sequences of the hemagglutinin and neuraminidase genes with that of the permitted Korean LPAI vaccine strain. It is thought that the method used in this study might be successfully applied to other viral genes of the LPAI vaccine strain and perhaps to other veterinary oil emulsion vaccines.     

Immunoadjuvant effects of bacterial genomic DNA and CpG oligodeoxynucleotides on avian influenza virus subtype H5N1 inactivated oil emulsion vaccine in chicken

This study investigated the immunoadjuvant effects of three types of bacterial genomic DNA and CpG oligonucleotides (CpG ODN) on the avian influenza virus (AIV) subtype H5N1 inactivated oil emulsion vaccine under two immunization strategies. The genomic DNA extracted from Escherichia coli O₂, Staphylococcus aureus, Streptococcus faecalis FQ68, and synthetic CpG ODN were used as adjuvants, and their effects on the AIV oil emulsion vaccine were examined in chickens. The results indicated that when administered separately from the vaccine, adjuvants induced lower haemagglutination inhibition (HI) titres and serum IgG titres but resulted in higher concentrations of IFN-γ and IL-10. In contrast, when combined with the oil emulsion vaccine prior to inoculation, CpG ODN induced higher HI, IgG titres and IFN-γ concentration but resulted in lower IL-10 concentration. These data suggest that, depending on the immunization approaches, adjuvants may exert distinct immune effects in chickens receiving AIV H5N1 oil emulsion vaccine: the prior incorporation of CpG ODN into the vaccine may augment both the humoral and Th1 type immune responses, while separate inoculation of adjuvants has not shown better adjuvanticity.     

用蓖麻油合成聚氨酯乳液的研究

以蓖麻油与聚醚（N210，Mn=1000)、甲苯二异氰酸酯（TDI）为主要原料，以二乙烯三胺、环氧氯丙烷、马来酸酐等为亲水单体，通过丙酮法制得了稳定的水性聚氨酯乳液。探讨了聚合反应的机理，研究了亲水单体含量对聚氨酯乳液的粘度、稳定性、乳液成膜的干燥时间以及胶膜的耐水性的影响。结果表明，当亲水单体环氧氯丙烷和马来酸酐含量为18.0%时，可以制得稳定的含蓖麻油的水性聚氨酯乳液，并且胶膜具有良好的耐水性。     

蓖麻油聚氨酯丙烯酸酯复合乳液的研制

采用甲基丙烯酸甲酯(MMA)与蓖麻油水性聚氨酯共聚反应制备蓖麻油聚氨酯丙烯酸酯(CPUA)复合乳液,研究了蓖麻油添加量、MMA添加量和引发剂种类对合成CPUA复合乳液及涂膜性能的影响,并应用傅立叶红外光谱(FT-IR)测定反应产物的结构.研究发现随着蓖麻油和MMA添加量增大,CPUA复合乳液胶粒平均粒径增大,粘度减小,涂膜光泽度下降,机械性能和耐水性增强,确定了合适的蓖麻油和MMA含量,分别为体系总固体质量的20%～25%和20%～30%.采用偶氮二异丁腈(AIBN)和过硫酸钾(KPS)复合引发剂可提高单体的转化率;性能测试表明,本研究合成的CPUA复合乳液具有优异的物理机械性能和耐水性.