共查询到19条相似文献,搜索用时 62 毫秒
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乳清奶酒因其具有丰富的营养价值和独特的风味而深受广大消费者的喜爱。本试验采用乳清粉为原料,研究奶酒发酵生产工艺。配制10%的乳清粉溶液,在35℃下用0.7%乳糖酶水解乳清粉3 h,然后向其中添加30%的蔗糖,经高压灭菌锅121℃,15 min的杀菌处理,冷却至28℃,添加1%酵母进行发酵,在25℃下发酵5 d~7 d,生产出具有奶香风味的乳清奶酒。经正交试验,得出发酵的最佳条件为:添加蔗糖量为30%,酵母菌发酵温度25℃,酵母添加量1%。 相似文献
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为探明CCZZ1和HT1两株乳酸菌对平菇菌糠发酵品质的影响,试验设计4个处理,即对照组(CK)、CCZZ1处理组(CCZZ1),HT1处理组(HT1)和CCZZ1+HT1处理组(MIX),每组3个重复。放置室温,发酵7 d、15 d和30 d开封,进行化学成分和发酵品质的测定分析。结果表明,与对照组相比,3个处理组平菇菌糠发酵料的乳酸含量显著升高(P<0.05),pH显著降低(P<0.05);添加乳酸菌处理发酵7 d和无添加发酵30 d,pH值降至4.2以下。表明两株乳酸菌的添加,能够提高平菇菌糠发酵料的发酵品质,有效保存其营养物质,缩短发酵时间。另外,两株乳酸菌效果对比中,HT1的效果稍优于CCZZ1。 相似文献
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乳酸菌是一种应用于发酵食品工业中的重要微生物,通过其代谢活动产生的乳酸及特殊风味物质可以赋予发酵食品特有的品质,被广泛应用于食品工业、生活保健与临床医学等领域中,因此乳酸菌发酵剂的制备与贮藏至关重要。冷冻干燥技术作为生产乳酸菌发酵剂的传统方法,具有成本高、耗时长及耗能多等缺点,而喷雾干燥具有低成本、高效快速、可连续生产等优点,是一种潜在的可替代冷冻干燥用于制备乳酸菌菌粉的干燥技术,但喷雾干燥过程中热空气对乳酸菌的致死效应导致干燥后乳酸菌的存活率较低。本文综述不同喷雾干燥工艺参数的研究现状,重点总结可能影响喷雾干燥乳酸菌发酵剂质量和功效的外部及内部因素。 相似文献
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以大肠杆菌ATCC25922和金黄色葡萄球菌ATCC25923为抑菌对象筛选开菲尔粒中具有抑菌功能的乳酸菌,将该乳酸菌株发酵上清液制成冻干粉,未纯化的抗菌肽质量浓度大于6.250 mg/mL时,对大肠杆菌ATCC25922和金黄色葡萄球菌ATCC25923抑菌效果显著,利用16S rDNA方法,鉴定该菌株为干酪乳杆菌。以该菌株制备发酵剂,添加量2、3、4 g/100 mL发酵全脂乳,4 ℃冷藏保存30 d,结果表明,发酵剂添加量越多,酸乳pH值越低,滴定酸度、硬度、黏度和持水率越高,脱水收缩率越低;发酵剂添加量3 g/100 mL和4 g/100 mL酸乳的感官评分无明显差异,且均高于发酵剂添加量2 g/100 mL酸乳。 相似文献
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乳酸菌电转化的原理与转化条件的优化 总被引:2,自引:0,他引:2
乳酸菌作为人和动物体内的正常菌群,具有诸多益生功能,因此被广泛应用于轻工、食品、医药及饲料工业等许多行业上。乳酸菌的遗传转化是限制对其遗传操作的关键因素之一,本文结合电转化原理,综述了乳酸菌电转化条件的优化指标。 相似文献
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研究乳酸菌发酵血管紧张素转换酶抑制肽对其功能特性的影响。结果表明:血管紧张素转换酶抑制肽经乳酸菌发酵后提高了血管紧张素转换酶抑制活性,其中以鼠李糖乳杆菌发酵后的活性最高,为97.83%;血管紧张素转换酶抑制肽对乳酸菌的生长有促进作用,以双歧杆菌活菌数量提高最大,鼠李糖乳杆菌次之;乳酸菌对致病性大肠杆菌有明显的抑制作用,血管紧张素转换酶抑制肽经乳酸菌发酵后对致病性大肠杆菌的抑制作用优于发酵乳,以鼠李糖乳杆菌的抑制作用最强,其抑菌圈直径高达24mm。 相似文献
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几株益生乳酸菌对Caco-2细胞的黏附及其对致病菌黏附的影响 总被引:1,自引:0,他引:1
以Caco-2细胞作为体外模型研究几株乳酸菌的黏附性能及其对大肠杆菌K88和鼠伤寒沙门氏菌的黏附抑制性能。采用荧光标记法评价这几株乳酸菌的黏附性能,并通过竞争、排斥和置换试验检测其对上述2株病原菌黏附的抑制作用。结果表明:1)除了乳酸乳球菌外,其他乳酸菌对Caco-2细胞的黏附率均高于这2株病原菌,且黏附率为乳杆菌(Lactobacillus)>肠球菌>致病菌>乳球菌。2)来源于健康鸡肠道的乳杆菌与分离于人肠道的鼠李糖乳杆菌(Lacto-bacillus rhamnosus)和食果糖乳杆菌(Lactobacillus fructivorans)的黏附率接近。3)大部分乳酸菌菌株能通过置换作用抑制大肠杆菌K88和鼠伤寒沙门氏菌的黏附。结果提示,这几株乳酸菌对肠上皮细胞均有较高的黏附率,尤其是乳杆菌,且它们的黏附有菌属特异性。乳酸菌抑制上述2种病原菌的黏附主要通过置换方式,但没有菌属特异性,且与其自身的黏附力也没有必然的联系。 相似文献
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本研究旨在制备一种乳酸菌发酵的扶正解毒散复合制剂,并探索其对肉鸡生长性能和免疫器官发育的影响。首先,利用单因子试验法将不同比例的黄芪、板蓝根、淫羊藿及复合中药提取液添加至乳酸菌的培养基中,测定中药对乳酸菌生长的影响;其次,利用正交试验对复合药液培养基进行优化,确定最佳的培养基配方;最后,选取1日龄健康AA肉仔鸡450只,随机分为3组,每组3个重复:对照组(抗生素)、试验Ⅰ组(发酵制剂)、试验Ⅱ组(未发酵制剂),分别在试验的第21、42天测定肉鸡的生长及免疫器官指标。试验结果显示,黄芪、板蓝根、淫羊藿及复合药液组的最高活菌数与对照组相比分别提高了261.64%、505.48%、156.16%、564.38%。通过正交试验得到复合发酵液最适生产培养基配方:复合药液100 mL、红糖2.0 g、蛋白胨0.3 g、豆粕2.0 g,发酵液活菌数为7.13×109 CFU/mL。肉鸡生长试验结果显示,1~42日龄阶段,Ⅰ、Ⅱ组的平均日增重分别比对照组提高了17.84%和8.22% (P<0.05),料肉比分别比对照组降低了10.88%和4.66% (P<0.05),平均日采食量明显高于对照组 (P<0.05);21、42日龄时,Ⅰ、Ⅱ组脾指数分别比对照组提高了11.04%和13.58% (P<0.05)、7.79%和7.41% (P<0.05),法氏囊指数分别比对照组提高了31.30%和26.23% (P<0.05)、15.65%和11.48% (P<0.05)。以上试验结果表明中药提取液能促进乳酸菌的增殖,复合发酵液能够提高肉鸡的生长性能并促进免疫器官的发育。 相似文献
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This study was aimed toproduce compound preparations of Fuzhengjiedusan fermented with Lactic acid bacteria and analyze its effectson growth performancesand immune organ growth of broilers. Firstly, to identify the influence of traditional Chinese medicine on the growth of Lactic acid bacteria, the medium for the growth of Lactic acid bacteria was filled with different proportions of Astragalusmembranaceus, Radix Isatidis, Epimedium and compound Chinese herbal medicine extracts by single factor test. Secondly, to confirm the optimum medium, orthogonal test was used to optimize the culture medium of compound medicine liquid. Finally, 450 one-day-old healthy AA broilers were randomized into three groups, each group had 3 repeats: control group (antibiotics), group Ⅰ(fermented preparation), group Ⅱ (unfermented preparation). The growth and immune organ index were determined in 21 and 42 days after administration. The results showed that the highest viable count of Astragalusmembranaceus, Radix Isatidis, Epimedium and compound medicine liquid groups were increased by 261.64%, 505.48%, 156.16% and 564.38%, respectively, compared with control group. The optimum medium composition was compound medicine liquid 100 mL, brown sugar 2.0 g, peptone 0.3 g, soybean meal 2.0 g. The viable count of fermentation liquid was 7.13×109 CFU/mL.The production results showed that in period of 1~42 days, the daily weight gain of group Ⅰ and Ⅱ were separately increased by 17.84% and 8.22% (P<0.05) than that of the control. What's more, the feed conversion rate was reduced by 10.88% (P<0.05). The average daily feed intake was significantly higher than control group (P<0.05). At 21 and 42 days, the spleen index of group Ⅰ were improved by 11.04% and 13.58% (P<0.05), respectively. The bursal index were raised by 31.30% and 26.23% (P<0.05), respectively. However, the spleen index of group Ⅱ were improved by 7.79% and 7.41% (P<0.05), respectively. The bursal index were raised by 15.65% and 11.48% (P<0.05), respectively. On the basis of the above results, it could be suggested that Chinese herbal medicine extracts can promote lactic acid bacteria proliferation and compound fermentation liquid can improve growth performance in broilers, as well as immune organ development. 相似文献