20%高效氯氰菊酯水乳剂的配方研究

研制了一种环境友好型农药制剂——20%高效氯氰菊酯水乳剂。按照水乳剂性能指标进行测试,筛选了一系列乳化剂、助剂;采用反相乳化法的加料顺序,用高速剪切乳化法配制水乳剂。结果显示,20%高效氯氰菊酯水乳剂的最佳配方为高效氯氰菊酯原粉20%、复合溶剂2号10%、复合乳化剂8号8%、助剂6%、去离子水加至100%,用该配方所制备的20%高效氯氰菊酯水乳剂各项指标均符合GB/T1603—2001。     

Effects of dietary supplementation of emulsifier and carbohydrase on the growth performance,serum cholesterol and breast meat fatty acids profile of broiler chickens

A total of 540 2‐day‐old male Ross 308 broilers were used in a 35‐day experiment and were randomly divided into five treatments: (i) NC (low energy); (ii) PC (high energy diet); (iii) P1 (NC + 0.1% carbohydrases); (iv) P2 (NC + 0.05% emulsifier); and (v) P3 (NC + 0.1% carbohydrases + 0.05% emulsifier). From days 0 to 21, body weight gain in PC and P3 treatments increased (P < 0.05) compared with NC treatment. The chicks fed PC, P1, P2 and P3 improved (P < 0.05) feed conversion ratio compared with the NC treatment throughout the whole experiment. Abdominal fat weight was heavier (P < 0.05) in PC, P2 and P3 treatments than in NC and P1 treatments. On day 35, serum total cholesterol and low density lipoprotein cholesterol concentration were higher (P < 0.05) and high‐density lipoprotein cholesterol was lower (P < 0.05) in NC and P2 treatments than in PC, P1 and P3 treatments. The concentration of oleic acid, linoleic acid and total unsaturated fatty acids were highest (P < 0.05) in PC than in the other treatments. In conclusion, the results indicate that low energy density diet had lower growth performance, while the inclusion of emulsifier and carbohydrases in low energy diets can partially improve growth performance.     

星型环氧乳化剂合成及乳液的性能研究

采用自制星型乳化荆合成水性环氧乳液，考察了乳化剂的结构与环氧乳液稳定性及涂膜性能的关系，优化了乳化荆在制备环氧乳液过程中的主要参数。研究结果表明：聚乙二醇和环氧树脂E-20中环氧基与羟基的物质的量比为1．5：1．0、聚乙二醇的相对分子质量为4000、乳化剂用量为10％时，制备的环氧乳液稳定性高、成膜性能优良。     

饲料脂肪源和乳化剂对牛蛙生长性能、肠道消化酶活力及肝脏生化指标的影响

本试验旨在研究以猪油或鱼油为脂肪源的饲料中添加乳化剂对牛蛙生长性能、肠道消化酶活力及肝脏生化指标的影响。试验采用2×2因子完全随机区组试验设计,2种脂肪源(猪油和鱼油)和2个乳化剂添加水平(0和300 mg/kg),配成4种等氮等能的试验饲料。将初始平均体重为(19.01±0.01)g的180只牛蛙随机分为4组,每组3个重复,每个重复15只蛙,进行为期8周的饲养试验。结果表明:未添加乳化剂的鱼油组增重率(WGR)和摄食量(FI)显著高于未添加乳化剂的猪油组(P0.05)。添加乳化剂的猪油组WGR和FI显著高于添加乳化剂的鱼油组(P0.05)。添加乳化剂的猪油组WGR、FI和特定生长率(SGR)显著高于未添加乳化剂的猪油组(P0.05),2组之间饲料系数(FCR)、氮沉积率(NRE)、能量沉积率(ERE)均差异不显著(P0.05)。添加乳化剂的鱼油组的各生长性能指标与未添加乳化剂的鱼油组均无显著差异(P0.05)。各组牛蛙胴体水分、粗蛋白质、粗脂肪和粗灰分含量差异不显著(P0.05),而添加乳化剂的猪油组全体粗脂肪含量显著高于未添加乳化剂的猪油组(P0.05)。各组牛蛙肠道蛋白酶和淀粉酶活力差异不显著(P0.05),饲料中添加乳化剂显著提高以猪油为主要脂肪源牛蛙的肠道脂肪酶活力(P0.05),而对以鱼油为主要脂肪源牛蛙的影响不显著(P0.05)。各组牛蛙肝脏过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活力无显著差异(P0.05)。在以猪油为主要脂肪源时,添加乳化剂显著提高肝脏丙二醛(MDA)含量(P0.05);在以鱼油为主要脂肪源时,添加乳化剂对肝脏MDA含量无显著影响(P0.05)。根据结果得出,在以猪油为主要脂肪源的饲料中添加乳化剂可提高牛蛙的生长性能。     

乳化剂在食品工业中的应用进展

乳化剂是食品工业中重要的一类食品添加剂,其使用广泛。介绍了食品乳化剂的主要品种、功能及其应用,并探讨了我国食品乳化剂的开发前景。     

一种水载型有机木材防腐剂的制备及其性能研究

为了制取不含金属的水载型有机木材防腐剂,选择十二烷基二甲基苄基氯化铵(BAC)、多菌灵和吡虫啉作为木材防腐剂的组分,以5%BAC、2%多菌灵、1%吡虫啉和10%乳化剂的配方,在乳化时间30 min、乳化温度70℃、搅拌速度1 000r/min的条件下进行乳化,得到稳定的水载型有机木材防腐剂.对木材防腐剂进行防腐、防霉实...     

豆奶乳化的稳定性和感官质量的模糊数学评判

研究了不同ＨＬＢ值的混合乳化剂和增稠剂对豆奶稳定性的影响，结果表明：ＨＬＢ为１１～１３时乳化剂具有良好的结果，黄原胶的效果优于其它增稠剂，豆奶的稳定性和它的粘度没有相关性，正交试验的最佳条件为：黄原胶０．４ｇ／ｋｇ，海藻酸钠０．５ｇ／ｋｇ，ｐＨ６．５（杀菌条件１２１℃，１５ｍｉｎ），与牛奶相比较，用模糊数学方法对最佳工艺条件下生产的豆奶进行感官质量分析，结果表明，该豆奶的感官特性可以接受。     

木素胺类沥青乳化剂的新产品开发

木素胺类乳化剂的乳化能力目前尚不理想，乳液稳定性不如其它类型乳化剂。本文论述了本素胺类沥青乳化剂产品的现状，根据发展道路施工新技术的要求分析了新产品开发的必要性，并在分析本素结构特点的基础上提出了复配政性和化学反应改性的途径。     

乳化剂对4.5%高效氯氰菊酯水乳剂 物理稳定性的影响

以4.5%高效氯氰菊酯水乳剂为研究对象,探讨了乳化剂的种类、用量、亲水亲油平衡值(HLB值)和结构对水乳剂物理稳定性的影响。结果表明:当乳化剂种类选定后,在一定用量范围内,水乳剂的粒径随着乳化剂用量的增加而变小,粒径分布范围变窄,稳定性增强,粒径大小可作为筛选乳化剂最佳用量的指标;乳化剂的HLB值与水乳剂的粒径及粒径分布范围关系密切;乳化剂的结构和水乳剂的乳液抗聚并性存在相关性,适当增加亲油性的饱和碳链长度,有助于提高水乳剂的乳液抗聚并性,进而获得稳定的水乳剂配方。     

NOVEL SYNTHETIC METHOD OF LINGNINAMINETYPE ASPHALT EMULSIFIER

The slurry sealing with cationic emulsified asphalt,which is a new technique inhighway construction,is rapidly extended at home and abroad.The technique should apply an ex-cellent slow set cationic cmulsifier.Now,slow set emulsifiers are ligninamines which are synthesizedby trimethylamine-epichlorohydrin route.Owing to high price and unstable quality,the extendingof slurry sealing technique is affected seriously.We prepare the ligninamine by a novel syntheticmethod.By the novel method,the cost of production is reduced by more than 30%,and the prod-ucts have stable quality,high emulsifying function and broad daptability for various asphalts.Thenovel synthetic method uses soda lignin,secondary amines and inexpensive aminating assistants asraw materials.The technological process of the method may use either one or two-step process,andthe technological condition are uncomplicated and easy to master.master.