杀菌型果汁乳酸菌饮料的研制

本文研究了杀菌型果汁乳酸菌饮料的研制方法.该产品在酸奶制作工艺的基础上,添加了果汁及其相应配料,调制成活性果汁乳酸菌饮料后进行杀菌冷却,灌装成成品.产品可常温存放,避免了普通活性乳酸菌在贮藏过程中需要冷藏的欠缺.     

杀菌型乳酸菌饮料的研制

阐述了杀菌型乳酸菌饮料的生产工艺，对生产中菌种的筛选，饮料的调制及杀菌条件的选择等方面进行试验后，确定了适合生产实际的方案。针对该饮料易发生沉淀、分层等现象，通过螯合剂的选择和正交试验取得各稳定剂的最佳添加组合，较好地解决了杀菌型乳酸菌饮料的稳定性问题，延长了产品的货架期。     

低糖无脂乳酸菌饮料的研制

低糖无脂乳酸菌饮料是一种深受消费者喜爱的保健饮料,但稳定性差,口感难调节(较含糖含脂乳酸菌饮料)。本实验研究了不同甜味剂对产品口感的影响和不同稳定剂对低糖无脂乳酸菌饮料稳定性的影响,结果表明,当发酵奶含量为38%时,采用果胶、CMC、瓜尔胶复配,产品稳定性好且口感细腻;采用木糖醇、AK糖、Aspartame进行复配,使产品酸甜适口且成本低。低糖无脂乳酸菌饮料需选用水性或水油两用且香气柔和的香精。      

低糖无脂乳酸菌饮料的研制

低糖无脂乳酸菌饮料是一种深受消费者喜爱的保健饮料,但稳定性差,口感难调节(较含糖含脂乳酸菌饮料)。本实验研究了不同甜味剂对产品口感的影响和不同稳定剂对低糖无脂乳酸菌饮料稳定性的影响,结果表明,当发酵奶含量为38%时,采用果胶、CMC、瓜尔胶复配,产品稳定性好且口感细腻;采用木糖醇、AK糖、Aspartame进行复配,使产品酸甜适口且成本低。低糖无脂乳酸菌饮料需选用水性或水油两用且香气柔和的香精。     

一种无糖褐色乳酸菌饮料的开发研究

通过单因素实验和复配实验,以离心沉淀率、黏度、感官品评为评价指标,研究了果胶和大豆多糖复配及其添加量对无糖褐色乳酸菌饮料稳定性的影响,并通过正交试验对3种甜味剂的配比进行优化,确定了应用在无糖褐色乳酸菌饮料中的复配甜味剂及其最适添加量。结果表明,无糖褐色乳酸菌饮料具有良好稳定性和口感的优化配方为:果胶0.25%,大豆多糖0.25%,木糖醇2.0%,安赛蜜0.028%,三氯蔗糖0.010%,由此配方制备的无糖褐色乳酸菌饮料其感官品评得分为96分。     

小米奶饮料的研制

把我国北方的小米浸提液与牛乳相结合研制出一种新型的奶饮料，通过实验解决了由于淀粉引起的沉淀。确保稳定性，并确定了加工工艺和技术参数，使其成为具有我国传统特色的，营养价值很高的饮用佳品。     

杀菌型乳酸菌乳饮料的研究

通过对杀菌型乳酸菌乳饮料的研究，确定了最佳工艺要点和稳定性的最佳配比，即羧甲基纤维素钠用量为0．6％，海藻酸丙二醇酯为0．1％，柠檬酸钠为0．04％（均为质量分数）。     

乳酸菌饮料的工艺研究

重点介绍了乳酸菌饮料工艺流程，确定工艺的最佳条件。     

低糖褐色乳酸菌饮料的研制

以安赛蜜、三氯蔗糖为甜味剂,代替部分蔗糖,降低饮料的蔗糖添加量;以乳酸FCC80为酸度调节剂,通过正交试验,确定安赛蜜、三氯蔗糖、蔗糖和乳酸的最适添加量,分别是0.012%, 0.012%, 2.0%和0.24%。分别以可溶性大豆多糖、高甲氧基果胶、复配稳定剂MA316为稳定剂,通过离心试验和黏度测试等测评,确定稳定剂采用可溶性大豆多糖,当其添加量为0.4%时,低糖褐色乳酸菌饮料的稳定性和口感最佳。     

CMC在乳酸菌饮料中的应用

乳是多种物质组成的混合物，含水分约88％左右，乳中各种物质相互组成分散的稳定体系。但是乳在酸乳饮料的发酵加工生产过程中，如饮料中添加营养强化荆，致使乳溶液的盐组成、溶液密度等发生改变；PH降低；热处理等对乳的稳定性都有极大的影响。因此，CMC作为优良的乳化稳定增稠剂使其在酸性蛋白饮料中被普遍使用。     

脂肪替代品对脱脂搅拌型酸奶流变性的影响

研究不同脂肪替代品对脱脂搅拌型酸奶流变性的影响。实验表明:适当浓度的海藻酸丙二醇酯(PGA)、琼脂、高酯果胶、明胶、变性淀粉,都可以使酸奶达到一定的表观黏度,具有增稠的作用,从而解决酸奶组织砂状和口感粗糙、乳清分离等问题。其中添加0.50%变性淀粉及0.10%果胶的抗剪切能力最好。     

脂肪替代品对脱脂搅拌型酸奶流变性的影响

研究了不同脂肪替代品对脱脂搅拌型酸奶流变性的影响。结果表明,适当浓度的海藻酸丙二醇酯(PGA)、琼脂、高酯果胶、明胶、变性淀粉,都可以使酸奶达到一定的表观黏度,具有增稠的作用,解决酸奶组织砂状和口感粗糙、乳清分离等问题。其中添加质量浓度为5g/L变性淀粉及质量浓度为1g/L果胶的抗剪切能力最好。     

菠萝酸奶饮料稳定性的研究

阐述了菠萝酸奶饮料的生产工艺,并从稳定剂、乳化剂、 糖酸比以及工艺条件等方面对菠萝酸奶饮料的稳定性进 行了研究,确定了最佳稳定条件为稳定剂0.4％,乳化剂 0.1％,蔗糖8％,菠萝汁10％,混合有机酸0.06％,采用二次 均质,65℃杀菌30min,产品稳定性较好。     

乳酸菌饮料稳定性的影响因素

乳酸菌饮料常常不能保持均匀的稳定状态，易分层和沉淀。如何解决饮料中蛋白质的稳定性是许多食品工作者以及生产厂家亟待解决的问题。就影响乳酸菌饮料稳定性的因素及防止措施等加以论述。     

Use of micellar casein concentrate for Greek-style yogurt manufacturing: Effects on processing and product properties

The objective of this work was to develop and optimize an alternative make process for Greek-style yogurt (GSY), in which the desired level of protein was reached by fortification with micellar casein concentrate (MCC) obtained from milk by microfiltration. Two MCC preparations with 58 and 88% total protein (MCC-58 and MCC-88) were used to fortify yogurt milk to 9.80% (wt/wt) protein. Strained GSY of similar protein content was used as the control. Yogurt milk bases were inoculated with 0.02% (wt/wt) or 0.04% (wt/wt) direct vat set starter culture and fermented until pH 4.5. The acidification rate was faster for the MCC-fortified GSY than for the control, regardless of the inoculation level, which was attributed to the higher nonprotein nitrogen content in the MCC-fortified milk. Steady shear rate rheological analysis indicated a shear-thinning behavior for all GSY samples, which fitted well with the power law model. Dynamic rheological analysis at 5°C showed a weak frequency dependency of the elastic modulus (G′) and viscous modulus (G″) for all GSY samples, with G′ > G″, indicating a weak gel structure. Differences in the magnitude of viscoelastic parameters between the 2 types of GSY were found, with G′ of MCC-fortified GSY < G′ of control, indicating a different extent ofprotein interactionsin the 2 types of yogurt. Differences were also noticed in water-holding capacity, which was lower for the MCC-fortified GSY compared with the control, attributed to lower serum protein content in the former. Despite some differences in the physicochemical characteristics of the final product compared with GSY manufactured by straining, the alternative process developed here is a feasible alternative to the traditional GSY make process, with environmental and possibly financial benefits to the dairy industry.     

Fermentation Studies on the Traditional Russian Drink “Sourish Shchi”

The fermentation process for the traditional Russian drink Sourish Shchi was investigated in order to better understand the original process, its flavour products and to investigate opportunities to improve the process. The six ingredients usually employed for the Sourish Shchi preparation (Shchi in Old Russian means “Six”) were: three kinds of malt — barley, rye and wheat; one kind of flour — wheat or rye; buckwheat and honey. This wort, composed of malted and unmalted grains, was traditionally fermented with a mixed culture of bacteria and yeasts to achieve the desired sourness, alcohol and flavor. Laboratory fermentations were conducted using traditional recipes and the fermentation parameters were examined.     

混菌发酵提高甘薯渣饲用价值的研究

对选育的扣囊拟内孢霉K991株、产朊假丝酵母C986株和绿色木霉T995株混合发酵甘薯渣生产的单细胞蛋白产品的饲用价值进行了研究。发酵产品的粗蛋白含量由发酵前8%提高到 2 6 9% ,纤维素降解了 36 16 % ,产品富含酵母活细胞和消化酶。替代 2 0 %饲喂猪试验表明 :产品适口性好 ,能降低料肉比 ,促进生长 ,具有较好的应用前景     

成品啤酒稳定性与啤酒酿造中主要物性参数的变化

通过对成品啤酒货架期内泡沫及表面张力等物性参数的测定 ,得出成品啤酒在货架期内表面张力、色度均增大。下面啤酒发酵过程中 ,随啤酒成熟 ,以上物性参数随之减小。初步确定了成品啤酒稳定性及啤酒酿造过程中物性参数间的关系     

固态发酵柠檬酸渣转化为多酶蛋白饲料的研究

研究了用黑曲霉Ａ１、Ａ１５和酵母Ｙ７固态发酵柠檬酸渣生产多酶蛋白饲料。在３０℃的最适温度下，３株菌种混合进行固体发酵，粗蛋白增加量（绝干）约为１６％～１８％，酸性蛋白酶活性５１３９ｕ／ｇ，纤维素酶活性达６１ｕ／ｇ。试验结果表明：该酸性蛋白酶在１００℃加热１ｈ有８０％的酶存活，系耐高温酸性蛋白酶。