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排序方式: 共有224条查询结果,搜索用时 78 毫秒
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WANG Xiu-qi FENG You SHU Gang JIANG Qing-yan YANG Jing-pei ZHANG Zi-feng 《中国农业科学(英文版)》2011,10(6):938-945
To investigate the effects of dietary supplementation with hydrolyzed wheat gluten (HWG) on growth performance, cell immunity and serum biochemical indices of weaned piglets, 160 crossed (Large White×Landrace) and weaned piglets were randomly divided into 4 treatments with 4 replicates of 10 piglets each. The piglets in each treatment were fed an experimental diet containing either 0 g kg-1 HWG (control group), 30 g kg-1 HWG (3% HWG group), 50 g kg-1 HWG (5% HWG group), or 2.5 g kg-1 glycyl-L-glutamine (0.25% Gly-Gln group). The results showed that the diarrhea rates in 3% HWG and 5% HWG groups were significantly lower than in control group from d 1 to 14 (P<0.05), while the average daily gain (ADG) in each of two groups was increased (P>0.05). When compared with control group, dietary supplementation with 3% HWG increased the ratio of CD4+:CD8+ and the ratio of serum albumin and globulin concentrations (A:G) on d 14 and 28, as well as the proliferation of T- and B-lymphocytes (P>0.05) on d 28. In addition, on d 14 and 28, the A:G ratio in 5% HWG group was significantly higher than in control group (P<0.05), while the ratio of CD4+:CD8+ increased slightly (P>0.05). Interestingly, 0.25% Gly-Gln group had higher proportion of CD3+ (P>0.05) and CD4+ (P<0.05) on d 14 than control group, but growth performances of 0.25% Gly-Gln group were negatively affected at all experiment stages. These results suggested that HWG might improve the growth performance of piglets by strengthening cell immunity and decreasing the occurrence of diarrhea during the prophase after weaning. 相似文献
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GUAN Zhi-hui CHEN Bao-jian PAN Tian-biao QIN Zhao-xian LIU Jia-qi MA Qing-yan NONG Su-qun XIE Bing-kun 《中国畜牧兽医》2017,44(3):628-634
The objective of this study was to clone the acyl-coenzyme A oxidase 1 (ACOX1) gene of Luchuan pig and analyze its genetic structure with bioinformatics. A pair of special primer was designed according to predicted sequence of pig ACOX1 gene in GenBank. The ACOX1 gene was amplified by RT-PCR, the physicochemical property and secondary structure of ACOX1 gene were systemically analyzed by bioinformatics techniques. The results showed that ACOX1 gene fragment included an 1 986 bp whole length CDS (coding 661 bp amino acids). The sequence multi-aligned results showed that Luchuan pig shared 99.5%, 85.5%,87.1%,66.3%,75.6%,84.0%,82.3%,81.1% and 69.1% of similar nucleotide sequence with that of pig,human, zebrafish, chicken, rhesus monkeys, mice, rat and frog, respectively. The prediction of ACOX1 secondary structure showed that Luchuan pig ACOX1 had no signal peptide and transmembrane structure. This study suggested that the whole CDS sequence of ACOX1 gene was successfully cloned in Luchuan pig, and the cloning and analysis of ACOX1 gene provided an important foundation for further studying on the fatty deposition and lipornetabolism of ACOX1 gene in Luchuan pig. 相似文献
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为充分认识入侵重庆地区草地贪夜蛾(Spodoptera frugiperda)的肠道微生物, 2019年7月该课题组再次在重庆江津地区高粱地采集了草地贪夜蛾幼虫,通过分离培养结合16S rDNA测序鉴定,从江津草地贪夜蛾幼虫肠道中共分离得到38个细菌分离株,归为9个属,分别为克雷伯氏菌属(Klebsiella)、肠球菌属(Enterococcus)、微球菌属(Micrococcus)、葡萄球菌属(Staphylococcus)、芽孢杆菌属(Bacillus)、不动杆菌属(Acinetobacter)、寡养单胞菌属(Stenotrophomonas)、假单胞菌属(Pseudomonas)和鞘脂杆菌属(Sphingobacterium).在课题组前期研究的基础上,新分离到了6个属,分别为克雷伯氏菌属(Klebsiella)、微球菌属(Micrococcus)、葡萄球菌属(Staphylococcus)、芽孢杆菌属(Bacillus)、寡养单胞菌属(Stenotrophomonas)和鞘脂杆菌属(Sphingobacterium).同时还对入侵重庆地区采食高粱和玉米的草地贪夜蛾幼虫肠道细菌分离株进行了比较分析,只在采食高粱的草地贪夜蛾幼虫肠道中发现了欧文氏菌属(Erwinia)、微球菌属(Micrococcus)、葡萄球菌属(Staphylococcus)、芽孢杆菌属(Bacillus)和寡养单胞菌属(Stenotrophomonas)的菌株,而气单胞菌属(Aeromonas)、短波单胞菌属(Brevundimonas)、金黄杆菌属(Chryseobacterium)和类香味菌属(Myroides)则只在采食玉米的草地贪夜蛾幼虫肠道中分离得到.通过对同一片江津高粱地的草地贪夜蛾和玉米黏虫(Mythimna separata)的肠道细菌分离株进行比较分析,只在草地贪夜蛾肠道中发现了微球菌属(Micrococcus)、欧文氏菌属(Erwinia)、假单胞菌属(Pseudomonas)、葡萄球菌属(Staphylococcus)和鞘脂杆菌属(Sphingobacterium),而金黄杆菌属(Chryseobacterium)只发现于玉米黏虫肠道中. 相似文献
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Myristic Acid (MA) Promotes Adipogenic Gene Expression and the Differentiation of Porcine Intramuscular Adipocyte Precursor Cells 下载免费PDF全文
LU Nai-sheng SHU Gang XIE Qiu-ping ZHU Xiao-tong GAO Ping ZHOU Gui-xuan WANG Songbo WANG Li-na XI Qian-yun ZHANG Yong-liang JIANG Qing-yan 《农业科学学报》2014,13(11):2488-2499
Intramuscular fat (IMF) content is considered to be a key factor that affects the marbling, tenderness, juiciness and flavor of pork. To investigate the effects of myristic acid (MA) on the differentiation of porcine intramuscular adipocytes, cells were isolated from longissimus dorsi muscle (LDM) and treated with 0, 10, 50 or 100 μmol L-1 MA. The results showed that MA significantly promotes the differentiation of intramuscular adipocytes in a dose-dependent manner. MA also led to a parallel increase in the expression of peroxisome proliferator activated receptor-γ (PPARγ) and adipose-related genes, such as glucose transporter 1 (GLUT1), lipoprotein lipase (LPL), adipocyte fatty acid binding protein 4 (FABP4/aP2), fatty acid translocase (FAT), acetyl-CoA carboxylase α (ACCα), adipose triglyceride lipase (ATGL) and fatty acid synthase (FASN). However, no significant effects of MA were observed on the expression of CAAT enhancer binding protein-α (C/EBPα) or hormone sensitive lipase (HSL). The expression of pyruvate dehydrogenase kinase 4 (PDK4) was increased by MA during the early stages of differentiation (day 1-3). In addition, MA also increased the absolute content of C14 (P<0.001) and saturated fatty acids (SFA) (P<0.05) to varying degrees, but no effects were observed on other fatty acids. These results suggest that MA might be able to enhance the IMF content of pork and increase the accumulation of myristic and myristoleic acid in muscle, which might have beneficial implications for human health. 相似文献
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为了确定在较长期NaCl胁迫条件下,青稞和大麦2种抗逆性较强的禾本科作物的耐盐性表型差异,并为应用比较基因组学技术进一步开发利用禾本科作物抗逆遗传资源打下基础。以1.0%及0.5%NaCl溶液( w/V)处理的大麦和青稞种子苗为材料,检测分析了这2种植物在NaCl胁迫1~5 d(4 d)条件下的营养生长状况及其对外界胁迫条件的生理响应表型。结果表明,相同NaCl胁迫条件下,青稞种子的萌发率显著高于大麦,而且在较长期的NaCl胁迫条件下青稞种子苗根和叶的生长状况均好于同期大麦。种子苗耐盐生理指标测定结果显示,在相同NaCl胁迫条件下青稞组织内的丙二醛( Malonyldialdehyde ,MDA)含量极显著低于大麦,而脯氨酸、可溶性糖含量以及超氧化物歧化酶( Superoxide dismutase ,SOD)比活力则高于大麦,上述结果显示:青稞幼苗比大麦有更好的耐盐性。 相似文献
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