搜索结果: 16-30 共查到“知识库 家畜微生物学”相关记录314条 . 查询时间(4.209 秒)
Antimicrobial effects of curcumin against L. monocytogenes,S.aureus,S.Typhimurium and E.coli O157:H7 pathogens in minced meat
curcumin antimicrobial effect foodborne pathogen minced meat
2016/6/3
The aim of this study was to determine the antimicrobial efficacy of curcumin, one of the active components of the Curcuma longa (turmeric) plant, against food pathogens in a minced meat medium. Salmo...
瘤胃4株纤维降解细菌的分离鉴定及其纤维降解特性
瘤胃纤维素降解细菌 筛选 鉴定 纤维素酶
2016/12/7
蒙古绵羊瘤胃内容物中筛选出四株纤维素降解细菌并进行鉴定，将其编号为H1、H2、N1、N2，对菌株生长特性和纤维素酶活力进行测定，以期为后续试验提供试验材料。通过生理生化特征、DNA序列分析对分离菌株进行鉴定,比浊法测定细菌生长曲线，用还原糖法测定四株细菌的滤纸酶活、羧甲基纤维素酶活、水杨苷酶活和微晶纤维素酶活力。结果表明：经鉴定，四株菌中H1、H2为黄色瘤胃球菌（Ruminococcus flav...
Long-term administration of DHEA prevents fat deposition in rats fed a high-fat diet
dehydroepiandrosterone lipid metabolism lipogenic gene expression
2016/5/11
The effects of dehydroepiandrosterone (DHEA) on lipid metabolism and lipogenic gene mRNA expression in rats subjected to a high-fat diet were determined. Totally 75 rats were randomly divided into 5 g...
Vitamin A affects the expression of antioxidant genes in bovine mammary epithelial cells with oxidative stress induced by diethylene triamine-nitric oxide
nitric oxide antioxidant enzymes inflammatory factors
2016/3/24
The considerable increase in oxygen requirements due to the high metabolic rate of the bovine mammary epithelial cells (BMEC) during lactation results in an augmented production of reactive nitrogen s...
天鹅源丙型副伤寒沙门菌感染实验小鼠的组织病理学及抗原分布
天鹅源丙型副伤寒沙门菌 病理变化 抗原分布
2016/9/21
为了研究天鹅源丙型副伤寒沙门菌感染致实验小鼠的组织病理学变化和其菌体抗原的组织分布，奠定菌株致病机制的研究基础，采用天鹅源丙型副伤寒沙门菌株口腔灌服感染实验小鼠，在感染后不同时点采集小鼠11个组织脏器制备石蜡切片，进行HE染色和免疫酶组织化学染色，对感染小鼠的组织病变及菌体抗原的分布进行观察。感染小鼠的心、肝、脾、肺、肾、肠道、脑等组织在感染3~6 h后开始出现炎性反应，直至感染后14 d；感染鼠...
猪源产新德里金属β-内酰胺酶-1大肠埃希菌的感染特性研究
猪 大肠埃希菌 NDM-1 感染
2016/1/26
对猪源产NDM-1大肠埃希菌E120413株在猪群中的交互传播、致病力和体内分布特性等进行初步探讨。仔猪粪便样本的细菌学检测结果表明，E120413株细菌能从接种仔猪快速传染给未接种的同居组仔猪；接种组仔猪粪便样本检测到E120413株细菌的持续时间最短为7周，最长超过11周；同居组的持续时间介于7~9周。仔猪血液样本的检测结果表明，E120413株细菌能快速突破仔猪的免疫防御进入血液循环形成菌血...
作者采用定量蛋白质组学方法，对猪繁殖与呼吸综合征病毒（PRRSV）感染猪肺泡巨噬细胞（PAMs）和正常PAMs的蛋白质组进行差异分析。通过高效液相色谱和电喷雾串联质谱仪定量分析PRRSV感染细胞与未感染对照细胞间的差异表达蛋白质，并运用Max-Quant 1.0.7.4软件结合蛋白质数据库PaxDb进行鉴定。与对照组相比，感染组共鉴定出39个差异表达蛋白质，其中30个蛋白质表达上调，9个蛋白质表达...
Effects of a low-phosphorus diet and exogenous phytase on performance,egg quality,and bacterial colonisation and digestibility of minerals in the digestive tract of laying hens
layers eggshell microbial 3-phytase ileum caecum Lactobacillus spp
2015/12/17
The objective of the experiment was to determine the effects of different levels of phytase (0, 150, 250, and 350 phytase units (FTU)/kg; F) produced by Aspergillus niger in the diets of hens fed decr...
Effect of light colour on egg production and egg contamination
monochromatic lights production performance microbial contamination laying hens
2015/12/17
The objective of this study was to compare the performance of laying hens, quality of air in poultry house, and microbial contamination of eggshell in laying hens kept under blue, green, red, and yell...
Effect of rabbit-origin enterocin-producing probiotic strain Enterococcus faecium CCM7420 application on growth performance and gut morphometry in rabbits
probiotic growth parameter functionality food-producing animals
2015/12/17
The interactions between probiotic bacteria and the immune system in animals are known, but particularly in rabbits have not been sufficiently documented. Therefore the present study deals with the ef...
PmrA-PmrB二元调控系统介导大肠杆菌对黏杆菌素耐药的机制研究
黏杆菌素耐药 大肠杆菌 pmrA-pmrB 突变
2016/4/29
已报道PmrA-PmrB二元调控系统在革兰阴性菌对多黏菌素B耐药过程中起重要作用，基于此认识，作者拟从基因突变和mRNA表达两个方面探讨PmrA-PmrB介导大肠杆菌对黏杆菌素耐药的可能性。首先检测了临床分离的52株禽致病性大肠杆菌对黏杆菌素的敏感性，筛选出耐药菌株；然后采用step-wise方法对黏杆菌素敏感菌株进行诱导，获得人工诱导的耐药菌株；最后通过PCR扩增所有耐药菌株的pmrA-pmrB...
Effect of green alga Planktochlorella nurekis on selected bacteria revealed antibacterial activity in vitro
chlorellin fatty acids gastrointestinal bacteria interaction microalgae thermostability
2015/10/29
The green alga Planktochlorella nurekis (Chlorellaceae, Chlorophyta) is considered a producer of antibacterial mixture of long-chain fatty acids, which has possibly similar composition and mode of act...
Egg surface decontamination with bronopol increases larval survival of Nile tilapia,Oreochromis niloticus
bacteria desinfectant egg disinfection tilapia egg
2015/10/29
Intensive tilapia egg incubation techniques create favourable conditions for microbial proliferation which often leads to massive mortalities of fish larvae. The effects of Nile tilapia (Oreochromis n...
副猪嗜血杆菌SC096株荚膜多糖抗猪肺泡巨噬细胞吞噬能力的研究
副猪嗜血杆菌 荚膜多糖 猪肺泡巨噬细胞 吞噬能力
2016/6/22
为探讨荚膜多糖在副猪嗜血杆菌（Haemophilus parasuis）抗猪肺泡巨噬细胞吞噬中的作用，作者用间接免疫荧光试验和流式细胞术对H.parasuis SC096分离株及其荚膜缺陷型菌株进行了抗巨噬细胞吞噬试验。间接免疫荧光试验显示野生菌株组的H.parasuis大多数存在于巨噬细胞外，而荚膜多糖缺失突变体则主要存在于巨噬细胞内。流式细胞仪检测结果表明，对应的野生型菌株组巨噬细胞总的吞噬率...