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为了优化盐酸咪唑苯脲复乳制剂的配方和乳化条件,首先通过单因素筛选试验,确定最佳油相和乳化剂的种类、浓度及油水比例、乳化条件确定初乳制备条件;再通过选择不同外水相乳化剂、外水相与初乳体积比、内水相稳定剂与用量以及乳化条件,确定复乳制备条件。结果表明,选择白油作为油相、10%的OP-10为乳化剂、油相和水相比例7∶3,乳化温度为40℃,乳化时间为3 min,乳化速度为10000 rpm时为制备乳剂的最佳条件;选择7%浓度的外水相乳化剂,外水相与初乳体积比为5∶5,选择10%明胶液稳定剂,采用25℃、1 min、4000 rpm的乳化条件制备的复乳制剂效果最佳,研究初步获得了盐酸咪唑苯脲复乳制剂配方和乳化条件。 相似文献
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本试验旨在研究乳化油脂对小鼠脂肪代谢的影响。选取21日龄健康小鼠200只,随机分为5组(每组5个重复,每个重复8只):对照组饲喂基础饲粮,试验组饲喂分别添加4%椰子油、4%乳化椰子粉、8%乳化椰子粉和4%豆油的试验饲粮,试验期14 d。结果表明:1)饲粮添加4%和8%乳化椰子粉的料重比显著低于4%椰子油和豆油组(P<0.05)。2)各试验组的脏器指数均无显著差异(P>0.05)。3)饲粮添加4%乳化椰子粉血清中的TC和HDL-C浓度显著高于4%椰子油、8%乳化椰子粉和4%豆油组(P<0.05)。4)各油脂添加组的肝脏总脂肪含量无显著差异(P>0.05)。5)饲粮添加4%乳化椰子粉的回肠小肠绒毛长度显著提高(P<0.05)。由此可见,小鼠饲粮添加4%乳化椰子粉,提高了血清脂质水平,减少小肠绒毛降低趋势,并降低了饲粮的料重比。 相似文献
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苜蓿干草提取叶蛋白最佳工艺的研究 总被引：5，自引：1，他引：5
采用酸化加热加盐的综合方法提取苜蓿干草中的叶蛋白。分别进行了草粉预浸时间、絮凝时间、絮凝温度、料水比、加盐量和提取液pH值等6个因素对叶蛋白粗蛋白质提取率影响的单因素试验研究,得到各单因素最佳工艺参数分别为:预浸时间24h,絮凝时间10min,料水比1∶30,絮凝温度60℃,pH值3,加盐量2%。对料水比、加盐量、絮凝时间和pH值的4因素3水平正交试验结果表明,影响粗蛋白质提取率的因素依次为料水比>加盐量>pH值>絮凝时间,最佳工艺条件组合为料水比1∶20,加盐量1%,絮凝时间5min和pH值为2.5。 相似文献
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本研究以发酵型益生菌冰淇淋感官指标（细腻度、口融性、发酵味、酸甜比、勺取性与硬度）,物理指标（膨胀率、抗融性与黏度）以及发酵剂与益生菌存活率作为指标,对发酵型冰淇淋主要配料中的白砂糖、复合乳化稳定剂的添加量进行了单因素试验,对两种配料的最优添加量进行了优化。结果表明,发酵型益生菌冰淇淋的配料中白砂糖的最优添加量为13%,复合乳化稳定剂的最优添加量为0.3%~0.45%。白砂糖、复合乳化稳定剂的添加量经过了优化,为企业今后生产该类产品提供了一定的理论、技术支持。 相似文献
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试验将经过巴氏杀菌(58℃,4.5 min)的全蛋液分别置于常温储藏和冷藏贮藏,分析贮藏期间全蛋液的挥发性盐基氮、起泡性及泡沫稳定性、乳化性及乳化稳定性的变化规律。结果显示:常温贮藏期间挥发性盐基氮含量的增长速率约为冷藏贮藏的2倍;全蛋液的起泡性和乳化性在贮藏期间均呈下降趋势,在常温贮藏1 d时起泡性达到较大值(41.9%),在冷藏贮藏1 d时乳化性达到较大值(27.8%)。全蛋液的起泡稳定性和乳化稳定性在贮藏期间均呈上升趋势,在常温贮藏第9天时起泡稳定性达到较大值(83.8%),在冷藏贮藏第11天时乳化稳定性达到较大值(42.4%)。 相似文献
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The emulsifying properties of porcine sarcoplasmic protein (SP) with or without low-molecular weight surfactants were examined. The emulsifying activity (EA) of SP was weaker than that of sodium caseinate (CA), blood plasma (BP) and whey protein isolates at a protein concentration of 0.5–3%. Sodium chloride decreased the EA of SP. The EA of SP was about one quarter that of CA in the presence of 3% sodium chloride. As homogenization time increased, the EAs of SP and BP decreased. The EA of SP was not influenced by sucrose stearate ester (SE) with a hydrophilic-lipophilic balance (HLB) value of 16 (SE-16) but was decreased by those with HLB values of 5 and 1. Low-molecular weight surfactants such as SE-16, Tween 80 and sodium cholate improved the EA of SP with the two-step emulsification method: corn oil was previously emulsified with the surfactant before addition of SP and homogenization. In the case of the addition of SE-16 as primary emulsifier, the EA was about twice as high as that of SP alone. The same effect was shown in the emulsions formed by CA and soy protein isolate. These results indicate that the emulsifying properties of meat protein would be improved by the addition of a low-molecular weight surfactant in a two-step emulsification. 相似文献
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以自制Mascarpone干酪和市售Cheddar干酪为原料制备再制干酪,研究4 种常见乳化盐（焦磷酸钠、六偏磷酸钠、多聚磷酸钠和柠檬酸钠）对再制干酪功能特性的影响,并进行乳化盐的复配优化。结果表明：4 种乳化盐的乳化能力大小为焦磷酸钠＞柠檬酸钠＞多聚磷酸钠＞六偏磷酸钠;根据单因素试验结果,采用响应面法,选择焦磷酸钠、柠檬酸钠和多聚磷酸钠进行乳化盐复配优化,得出乳化盐的最佳配方为多聚磷酸钠添加量0.70%、柠檬酸钠1.50%、焦磷酸钠0.40%。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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Reasons for performing study: Clinical experiences indicate that centesis of the lateral compartment of the femorotibial joint is often unsuccessful. Objective: To determine the accuracy of 2 published and 2 unpublished techniques of centesis of the lateral compartment of the femorotibial joint. Hypothesis: It was hypothesised that a drug can be administered into the lateral compartment of the femorotibial joint via a diverticulum of this joint that surrounds the medial aspect of the long digital extensor tendon and that this technique is more accurate than described techniques of centesis of this compartment. Methods: Twenty‐four stifles of 12 horses were divided equally into 4 groups and a radiocontrast medium injected into the lateral compartment of the femorotibial joint of each group using a hypodermic needle inserted: 1) caudal to the lateral patellar ligament and proximal to the tibial plateau, 2) caudal to the long digital extensor tendon and proximal to the tibial plateau, 3) between the long digital extensor tendon and bone of the extensor groove of the tibia or 4) directly through the long digital extensor tendon until it contacted bone. Twelve veterinary students who had no experience using any of these techniques performed the injections. Accuracy of each technique was determined by examining radiographs obtained after injecting the contrast medium. Results: The most successful technique for arthrocentesis was by inserting a needle through the long digital extensor tendon. This approach was successful in all attempted cases, whilst other techniques had lower rates of success. Conclusions: The lateral compartment of the femorotibial joint can be accessed accurately by inserting a needle through the long digital extensor tendon as it lies within the extensor groove. Other techniques may not be as accurate for clinicians inexperienced in arthrocentesis of the lateral compartment of the femorotibial joint. 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献