酸化剂技术资料PPT.ppt

动物饲料的酸化 Acidification of animal feeds;有关乳猪断奶和养殖盈利的一般原则…General thoughts surrounding weaning and profitable pig production…;为什么要把饲料酸化? Why Dietary Acidification?;胃液酸化的重要性 Importance of Gastric Acidification;缓冲机制 Buffering Mechanisms;断奶猪胃液pH值的时间变化趋势(每个数值是15个数值的平均值; Thomlinson et al, 1981) Stomach pH values over time in the weaner pig(each value is the mean of 15 values; Thomlinson et al, 1981);结　论 Conclusion;然而 … However …; pH值的作用— 抗微生物 — The pH effect— antimicrobial —; ; ;;pH 的作用— 消化功能 — The pH effect— digestive —;;高缓冲能力 (HBC) 1 和低缓冲能力 (LBC)猪饲料 (DECUYPERE ET AL, 1997) THE HIGH BUFFER CAPACITY (HBC) 1 AND LOW BUFFER CAPACITY (LBC) OF THE PIGFEEDS (DECUYPERE ET AL, 1997);(1)测定了两种不同缓冲能力的日粮: a) 高缓冲能力日粮 926 meq (HBC) b)低缓冲能力日粮566 meq (LBC) (1) Two diets with different buffer capacity were tested: a) A high buffer capacity diet with 926 meq (HBC) b) a low buffer capacity diet with 566 meq (LBC) (2)带有上标的差值表示有极显著差异 (p0.01) (2)differences with superindex are highly significant (p0.01) ;几乎所有营养成分的消化率都受到高缓冲能力饲料的抑制．这或许表明发生了总体的 “吸收不良”. The digestibility of nearly all nutrients was depressed by the High Buffer Capacity feed. This might indicate that a general “malabsorption” has occurred.;阴离子效果— 抗微生物 — The anion effect— antimicrobial —;膜 扰 动  Membrane perturbation ;乳　酸 Lactic acid;HCl @ pH 2 ，3以及有机酸pH 3杀灭大肠杆菌 0157 (Jordan et al, 1999) E. coli 0157 killing with HCl @ pH 2 3 with organic acids at pH 3(Jordan et al, 1999);阴离子效果 ! The anion effect !;有机酸的效能 Efficacy of organic acids;乳酸宝? 牌酸化剂 Acid LAC? brand acidifier;乳酸宝? 牌酸化粉剂 (总酸含量67%) Acid LAC? DRY brand acidifier (67% total acid content);早酸 Formic acid pK 值 = 3.75 pK value = 3.75 刺激性,腐蚀性酸 pungent, corrosive acid 很快被肠壁吸收 rapidly absorbed across intestinal wall 闪点= 68oC) Flash point = 68oC) 乳酸宝? 牌酸化液剂的抗菌活性 Acid LAC? Liquid brand acidifier anti-microbial activity(Acid Lac 液 3 ml/l, 接触20 min. 20 C, % 杀