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果寡糖对猪粪便细菌群作用下L-色氨酸代谢的影响 总被引：3，自引：0，他引：3
本试验研究了果寡糖对猪粪便细菌群作用下L -色氨酸代谢的影响。将 10 % (W/V)粪水厌氧分装于无菌瓶中 ,分成 4组 :1组 (对照 )添加 2 5 0 μmol/LL -色氨酸 ;2～ 4组 :分别在对照组的基础上添加 0 .5 % ,1.0 %和 1.5 %果寡糖。 38℃、厌氧培养。在培养期的不同时间点 (0 ,2 ,4 ,6 ,8,12 ,18,2 4h)分别从各瓶中取 1mL培养液 ,分析各培养液中吲哚类物质含量。培养 2 4h后 ,分析各培养液中细菌学指标和pH。结果表明 :含L -色氨酸的体外培养液中添加 0 .5 % ,1.0 %和 1.5 %果寡糖 ,培养 2 4h后 ,使粪臭素浓度、吲哚 - 3-乙酸峰值和pH值均显著降低。添加1.0 %和 1.5 %果寡糖显著降低色氨酸降解率和粪臭素相对产率 ,显著提高吲哚相对产率 ,显著降低梭菌和大肠杆菌数 ,显著增加双歧杆菌和总厌氧菌数。 相似文献
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改良低聚果糖口服补液盐,使其具有调节微生态、补充VB1等作用,并应用于临床兔腹泻的防治.在腹泻预防试验中,改良低聚果糖口服补液盐、低聚果糖口服补液盐组和空白对照腹泻发病率分别为3.7%、12%、60%;在腹泻的治疗试验中,改良低聚果糖口服补液盐对腹泻症的治疗有效率达到89.1%;在腹泻和其他药物的治疗对照试验中,改良低聚果糖口服补液盐、低聚果糖口服补液盐组、黄连素组、空白对照,对腹泻症的治疗有效率分别为90.9%、78.9%、58.3%、18.8%. 相似文献
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小麦米糠日粮添加粗酶制剂和寡果糖对雏鸡生产性能、免疫和内分泌的影响 总被引：15，自引：0，他引：15
2次重复试验研究小麦米糠基础日粮添加粗酶制剂和寡果糖对雏鸡生产性能、免疫功能和内分泌的影响。每次试验96只7日龄鸡随机分为4组，即基础日粮组、基础日粮添加0．1％酶组、添加0．5％寡果糖、同时添加0．1％酶和0．05％寡果糖组。结果表明，酶制剂和寡果糖均能显著提高雏鸡增重和饲料转化率（P＜0．05），使雏鸡的免疫器官和重量增加（P＜0．05），T淋巴细胞对PHA的反应性、NK细胞活力、血清新城疫疫苗抗体效价显著提高（P＜0．05），血液T3和胰岛素水平显著提高（P＜0．05），T4水平变化不显著。同时添加酶制剂和寡果糖与单独添加酶制剂或寡果糖相比，未见协同加性效应，提示酶制剂作用机制可能是通过降解日粮中多糖产生活性寡糖发挥其生理调节作用。 相似文献
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Xi Hu Hong‐Ling Yang Yang‐Yang Yan Chun‐Xiao Zhang Ji‐dan Ye Kang‐Le Lu Ling‐Hao Hu Jiao‐Jing Zhang Lan Ruan Yun‐Zhang Sun 《Aquaculture Nutrition》2019,25(1):194-204
The effects of fructooligosaccharide (FOS) on growth performance, immunity and predominant autochthonous intestinal microbiota of shrimp (Litopenaeus vannamei) fed diets with fish meal (FM) partially replaced by soybean meal (SBM) were evaluated. After acclimation, shrimps (1.82 ± 0.01 g/kg) were allocated into 15 tanks (25 shrimps per tank) and fed five different diets including positive control diet (C0, containing 250 g/kg FM and 285 g/kg SBM), control diet (C, containing 125 g/kg FM, 439 g/kg SBM) and three experimental diets supplemented with 1.0 g/kg FOS (T1), 2.0 g/kg FOS (T2) and 4.0 g/kg FOS (T3) to control diet (C) respectively. Shrimps were fed diets to apparent satiation three times per day, and 15 shrimps from each aquarium were randomly sampled and analysed at the end of the 6‐week feeding trial. The results showed that FBW, WGR, SGR and SR decreased, while FCR and FI increased significantly in control (C) compared with positive control (C0). Besides, significantly decreased trypsase and lipase activities, and SOD, AKP and ACP activities were recorded in control (C) compared with positive control (C0). On the other hand, significantly improved SGR and decreased FCR were observed in groups T1, T2 and T3 compared with control (C). Moreover, lipase and amylase activities enhanced significantly in group T3 compared with the control (C), while GOT and GPT activities dropped significantly with the increment supplementation of FOS in diets. Compared with the control (C), SOD activity enhanced significantly and MDA level decreased significantly in groups T2 and T3, and improved AKP and ACP activities were observed in group T3. In addition, dietary FOS improved the microbial diversity, and suppressed several potential pathogens, such as Vibrio tubiashii, Vibrio parahaemolyticus and Photobacterium damselae‐like strains in the intestine of shrimp. Overall, these results proved FOS could relieve the side effects induced by SBM and supported the use of 2.0–4.0 g/kg FOS in shrimp diets with FM partially replaced by SBM. 相似文献
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果寡糖对肉仔鸡肌肉中胆固醇水平的影响及其机理探讨 总被引：21，自引：0，他引：21
研究了果寡糖对艾维因商品代肉仔鸡肌肉中胆固醇水平的影响,并探讨了其机理。结果表明:与对照组相比,肉仔鸡日粮中添加0 4%、0 6%和0 8%果寡糖使日增重分别提高了9 33%(P<0 01)、10 97%(P<0 01)和9 72%(P<0 01),使料重比分别降低了7 11%(P<0 05)、8 79%(P<0 05)和7 95%(P<0 05)。添加0 6%和0 8%果寡糖,胸肌、肝脏胆固醇水平分别下降了17 58%(P<0 01)和20 44%(P<0 01),6 62%(P<0 05)和7 87%(P<0 01)。添加0 6%和0 8%果寡糖使血清中总胆固醇、低密度脂蛋白胆固醇和低密度脂蛋白/高密度脂蛋白胆固醇的比率显著降低,添加0 8%果寡糖使血清中极低密度脂蛋白胆固醇含量显著降低。添加0 4%、0 6%和0 8%果寡糖使肝脏中3 羟基 3 甲基戊二酰辅酶A(HMG CoA)还原酶活性显著降低。添加0 6%和0 8%果寡糖使盲肠中乙酸、丁酸和血浆中乙酸含量显著提高,添加0 4%、0 6%和0 8%果寡糖使盲肠中丙酸含量显著提高。添加0 4%、0 6%和0 8%果寡糖使盲肠中双歧杆菌和乳酸杆菌显著增加,使大肠杆菌显著下降。添加0 6%和0 8%果寡糖使粪便中胆汁酸含量显著提高,添加0 8%果寡糖使粪便中胆固醇含量显著提高。上述结果显示,果寡糖可能通过改变盲肠发酵而抑制胆固醇的吸收和合成以及增加粪便中胆固醇和胆汁酸的排出,从而降低肉仔鸡肌肉中胆固 相似文献
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