花生乳牛乳混合干酪的工艺研究

对影响混合乳干酪凝乳效果的主要因素进行了研究,试验结果表明:当花生乳添加量为20%,发酵酸度为24°T,皱胃酶添加量为0．30%,CaCl_2添加量为0．06%时凝乳效果较好。     

花生乳牛乳新鲜干酪加工工艺优化

用花生乳代替部分牛乳生产新鲜干酪,对花生乳添加比例、氯化钙添加量、凝乳酶添加量3个因素对凝乳效果的影响分别进行单因素试验,确定各自合适比例后,再采用L9(33)正交试验,确定花生乳牛乳新鲜干酪最佳生产工艺。结果表明花生乳添加量20%、氯化钙添加量0.06%、凝乳酶添加量0.002%时制作出的新鲜花生乳牛乳干酪成品呈乳白色、柔软、有弹性、具有花生风味,产品出品率为16.33%。     

红枣干酪加工工艺研究

红枣干酪是在原料乳中添加枣泥制成的,符合中国人口味的风味干酪。对影响红枣干酪凝乳效果的主要因素进行了研究,试验结果表明:添加4%的枣泥,原料乳浓度越大,凝乳效果越好,用巴氏杀菌或高温短时杀菌,调节酸度到24°T,添加0.04%的CaCl2,凝乳效果较好。     

甜干酪的加工工艺研究

研究凝乳酸度、凝乳温度、氯化钙添加量、凝块切割大小、排乳清温度和糖添加量对甜干酪的产率和凝乳特性的影响.结果表明,甜干酪的最佳加工工艺参数为:凝乳酸度26 °T,凝乳温度42℃,氯化钙添加量为0.018%,凝块切割大小4mm～6mm.排乳清温度44℃～48℃,糖添加量为2%～4%.     

混合乳干酪生产工艺研究(2)混合乳干酪生产最佳工艺参数优化

本试验在已筛选出的发酵剂菌种、最佳凝乳酶和钙化合物的基础上,又综合考虑了影响混合乳(豆乳和牛乳)干酪的几大因素,即豆乳添加量,发酵剂添加量,乳酸钙添加量和凝乳酶添加量,由此优化出混合乳干酪生产的最佳工艺参数.结果表明最佳发酵剂为干酪乳杆菌99108+嗜热链球菌(11),最佳凝乳酶为皱胃酶,最佳钙化合物为乳酸钙,而70%大豆豆乳与30%牛乳混合,添加4%发酵剂,0.2%乳酸钙和0.015%皱胃酶则为最佳的工艺参数.     

花生乳生鲜干酪的研制

以花生乳部分代替牛乳制作混合干酪,不仅可以使动植物蛋白得到互补,还可以使干酪具有花生的保健功效和特有的香味。针对花生乳添加量、发酵剂添加量、氯化钙添加量、凝乳酶添加量四个因素对凝乳效果和成品质量的影响进行单因素实验及L9(34)正交试验,最终结果表明:花生乳添加量为10%,发酵剂添加量为3%,氯化钙添加量为0.04%,凝乳酶添加量为0.025%时,凝乳效果最好。     

羊奶牛奶混合干酪加工工艺研究

为改进羊奶牛奶混合干酪加工工艺,本实验以羊奶粉和鲜牛奶为原料,研究了牛奶添加比例、不同凝乳酶、杀菌条件、酸化条件和氯化钙添加量对混合干酪凝乳效果、出品率和感官品质的影响。结果表明,添加35% 的鲜牛奶,选用羔羊皱胃酶为凝乳酶,巴氏杀菌(63℃,30min),酸化pH6.20,氯化钙添加量为0.02% 时混
合干酪的品质较好。     

半硬干酪加工工艺研究

本文主要研究了半硬干酪的加工工艺.通过试验得半硬干酪的最佳工艺条件为凝乳酶的添加量为3 g/100L,不添加CaCl2,盐水浓度为12%,后熟温度为7 ℃.且凝乳酶的添加量和后熟温度对半硬干酪品质的影响相对较大.     

干酪加工工艺的国内研究现状

干酪的营养价值很高,被称之为"乳品之王".目前,国内对干酪的研究越来越多.综述国内干酪加工工艺的研究现状,种类有硬质干酪、半硬质干酪、软质干酪、新鲜干酪和符合中国人口味的干酪及干酪食品,并提出今后国内干酪加工工艺的研究方向.     

响应面法优化Camembert干酪加工工艺

在氯化钙添加量、凝乳酶添加量、凝乳温度、排乳时间等单因素实验的基础上,根据Box-Behnken中心组合实验设计原理,采用4因素3水平响应曲面分析法,以凝乳效果为响应值建立二次多项回归模型,并验证模型的有效性。实验结果表明：Camembert干酪最佳制作工艺为氯化钙添加量为0．06％,凝乳酶添加量为0．02％,凝乳温度为32℃,排乳时间为30min。在此条件下,理论凝乳效果得分为89．63,验证值为89．50。     

豆奶,牛奶混合型干酪的研制

以豆奶和牛奶为原料，通过干酪制作条件的优化研究，得出了生产混合型干酪的重要工艺参数和技术要点。实验表明，用含有２０％豆浆的牛奶作为混合原料奶，消毒后加入２％的发酵剂和凝乳酶，经１－２月成熟，即可得到风味与纯牛奶干酪无显著差异的优质混合型干酪。     

工艺过程对牛奶干酪出品率的影响

目的 确定提高牛奶干酪出品率的最优工艺条件.方法 经三因素二次回归正交旋转组合设计试验,研究凝乳酶添加量、酸度和氯化钙添加量对牛奶干酪出品率的影响.结果 建立了各影响因子与牛奶干酪出品率关系的数学回归模型,确定了干酪出品率达到最高值时主要的工艺参数.结论 凝乳酶添加量7 266 SU,原料乳酸度27度T,氯化钙添加量0.03%,干酪出品率最高值可达10.04%.     

Process for Low-fat Cheese from Ultrafiltered Milk

Our objective was to optimize the process for making low-fat cheeses using liquid pre-cheeses obtained by ultrafiltration (UF). The study was conducted to examine the effects of using different proportions of cow, sheep, and goat milk in different compositions on the characteristics of cheeses, and to determine the effect of heating of the retentate on texture. Using ultrafiltered semi-skim milk (total protein content of retentate of 13–14%), cheeses with acceptable quality and reduced fat content were produced. Heating of the retentate produced by UF at 68–72°C, 20 s, improved cheese texture.     

调配型酸性含乳饮料工艺流程与装备研究

本文介绍了调配型酸性含乳饮料的最新生产工艺 ,加工与包装设备的选型 ,以及关键的产品质量控制点     

新型豆汁牛乳混合型干酪的初步研制

采用驯化后的乳酪杆菌为菌种,以豆汁(以m大豆:V水=1:6的比例制成)、纯牛奶、V(豆汁):V(牛奶)=1:1、V(豆汁):V(牛奶)=1:5为原料制作干酪,比较研究不同原料和原料配比对干酪的化学成分、感官评价的影响。结果表明纯牛奶干酪的口感比豆汁干酪爽滑细腻,蛋白质和脂肪含量比纯豆汁的高;复配干酪的口感和脂肪含量介于纯牛奶干酪和豆汁干酪之间,并与牛奶的添加量成正比;复配干酪的蛋白质含量比纯牛奶干酪和豆汁干酪的都低。     

Proteolysis and Lipolysis of Goat Milk Cheese

Numerous varieties of goat milk cheeses are produced worldwide. Maturation or ripening of goat and other species milk cheeses is governed by interplay of many different factors. Proteolysis and lipolysis are two major biochemical processes in the multifaceted phenomenon of cheese aging, which involves a variety of chemical, physical, and microbiological changes under controlled environmental conditions. Proteolysis of cheeses in general is influenced by several factors including plasmin, chymosin, protease from starter and nonstarter bacteria, pH and moisture levels of the curds, storage temperature and time, salt content, salt-to-moisture ratio, and humidity. Primary factors affecting lipolysis in cheeses are fatty acid composition, lipolytic enzymes, lipolytic microorganisms, moisture, temperature, storage time, oxygen, and surface area, etc. Several analytical techniques have been used to measure proteolysis of goat and (or) cow milk cheeses during ripening, such as solubility of peptides and amino acids in various solvents or precipitants, liberation of reactive functional groups, various forms of chromatography, and different forms of electrophoresis. Lipolysis of goat milk cheeses has been estimated by acid degree value (ADV), acid value, and free fatty acid concentration, while lipid oxidation of dairy goat products can be determined by peroxide value, thiobarbuturic acid value (TBA). Recent reports have shown that goat cheeses had greater rates of protein degradation than cow counterparts, and that aging time and temperature synergistically elevated most of proteolytic and lipolytic indices in goat cheeses. This paper will further discuss proteolytic and lipolytic characteristics of goat milk cheeses.