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从玉米青贮中分离到一株共轭亚油酸生产菌(ANCLA01),发酵液中共轭亚油酸生成量为33.442 μg/mL;菌株为革兰氏染色阳性杆菌且菌体短直、两端钝圆,不产芽孢;发酵时有乳酸生成,属于同型发酵B型并对底物要求特殊的乳酸杆菌;分子生物学鉴定结果表明,该菌株与Lactoba-cillus plantarum strain L5的16S rRNA碱基序列相似性达99.93%.兼顾该菌株传统鉴定方法,确定其为植物乳杆菌(Lactobacillus plantarum).结果表明:ANCLA01菌株是青贮玉米中确产共轭亚油酸的植物乳杆菌. 相似文献
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此文综述了天然植物中的免疫多糖的生物学效应和作用,以及免疫多糖在养猪生产中的应用,为开发绿色无公害饲料添加剂提供参考依据。 相似文献
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The mutant effects of a keV range nitrogen ion (N+) beam on enzyme-producing probiotics were studied, particularly with regard to the induction in the genome. The electron spin resonance (ESR) results showed that the signal of ESR spectrum existed in both implanted and non-implanted spores, and the yields of free radicals increased in a dose-dependent manner. The ionic etching and dilapidation of cell wall could be observed distinctly through the scanning electron microscope (SEM). The mutagenic effect on genome indicated that N+ implantation could make base mutation. This study provided an insight into the roles low-energy ions might play in inducing mutagenesis of micro-organisms. 相似文献
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利用醋酸棉酚作为唯一碳源,筛选出一株高效降解棉酚的菌株RE-1。通过扫描电镜和16S rRNA分子学鉴定该菌为红平红球菌(Rhodococcus erythropolis),Gen Bank序列登录号为KR906527。扫描电镜和透射电镜观察固体LB培养基和棉酚培养基中的RE-1菌株可知,棉酚会通过破坏菌体细胞膜通透性的方式来抑制RE-1的生长。实验确定的棉粕最优发酵条件为RE-1接种量20%、时间8 d、温度34℃、p H 5.0、料水比1∶0.5,最优条件下棉酚的降解率达到72.54%,棉粕中粗蛋白质含量提高了21.38%,粗纤维含量降低了20.26%,释放出营养物质,提高了棉粕的消化利用率。 相似文献
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