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为了开发一套赤藓糖醇的结晶工艺,该文研究了包括晶种添加量、溶液初始浓度、结晶时间和结晶温度在内的4个主要因素对赤藓糖醇结晶收率的影响。然后根据单因素试验的结果,采用响应曲面法整体优化了赤藓糖醇的结晶工艺参数。响应面优化结果显示,水溶液中赤藓糖醇结晶的最优操作条件为,晶种添加量1.0%,赤藓糖醇溶液初始质量浓度550 mg/mL,结晶时间3 h,结晶温度-4.5℃。上述条件下,赤藓糖醇的一次结晶率为52.78%。该文得到的模型可以用来优化赤藓糖醇在水溶液体系中的结晶过程。该模型化的工艺获得了较高的赤藓糖醇结晶收率。 相似文献
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《食品与发酵工业》2017,(3):36-41
研究了D-木糖、L-阿拉伯糖、海藻糖、棉籽糖、水苏糖、赤藓糖醇、异麦芽酮糖醇、山梨糖醇、木糖醇以及麦芽糖醇等小分子糖及糖醇对α-葡萄糖苷酶活性的抑制作用,以期为降糖营养食品的开发提供参考。通过高效液相色谱法,确定α-葡萄糖苷酶对糖及糖醇的分解作用,进一步检测各种糖及糖醇在蔗糖底物存在下对α-葡萄糖苷酶的抑制作用,将抑制效果较好的糖及糖醇进行复配,利用Calcusyn软件计算复配结果,观察样品的相互作用。D-木糖、L-阿拉伯糖、海藻糖、赤藓糖醇、异麦芽酮糖醇、山梨糖醇均能抑制α-葡萄糖苷酶的活性,且D-木糖、L-阿拉伯糖、海藻糖、赤藓糖醇、异麦芽酮糖醇以及山梨糖醇的IC50值分别为23.89 mg/mL、15.03 mg/mL、9.75 mg/mL、3.19 mg/mL、20.64 mg/mL、106.19 mg/mL。赤藓糖醇分别与海藻糖、异麦芽酮糖醇复配后对α-葡萄糖苷酶的抑制作用明显增强(联合指数CI1),表现出协同效应。结论:赤藓糖醇与海藻糖或异麦芽酮糖醇复配后(CI1)有助于增强对α-葡萄糖苷酶的抑制作用。 相似文献
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开发以芦荟和雪莲果为主的零蔗糖果味酱,可广泛应用于零蔗糖的产品中。以库拉索芦荟凝胶颗粒、雪莲果颗粒为主料,搭配赤藓糖醇、葡萄糖基甜菊糖苷、罗汉果甜苷、新甲基橙皮苷二氢查耳酮,研究零蔗糖芦荟雪莲果果味酱的配方及加工工艺。通过正交试验优化出3种高甜度天然甜味剂配比,搭配赤藓糖醇,得到最接近蔗糖1∶1甜度的复配甜味剂:赤藓糖醇99.399%、葡萄糖基甜菊糖苷0.3%、罗汉果甜苷0.3%、新甲基橙皮苷二氢查耳酮0.001%。用该复配甜味剂制作的芦荟雪莲果果味酱,产品甜度适宜,口感兼具芦荟的柔软和雪莲果的脆爽,经第三方机构检测该产品为零蔗糖。零蔗糖芦荟雪莲果果味酱是一款零蔗糖、无色素、无香精,糖尿病患者也可食用的色香味俱全的天然食品。 相似文献
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在不添加增稠剂的情况下,以三种糖醇(麦芽糖醇、木糖醇、赤藓糖醇)分别替代蔗糖,制备低脂无糖的绿茶卡仕达酱,研究不同糖醇对绿茶卡仕达酱感官品质、色度、贮藏稳定性、流变特性以及质构的影响。结果表明:三组糖醇与蔗糖组在甜味方面并无显著差异,糖醇可作为良好的糖替代品,木糖醇组具有良好的色泽和甜味,综合得分7.53,赤藓糖醇组具有良好的口感和涂抹性,综合得分7.40。与蔗糖组相比,三种糖醇均可提高绿茶卡仕达酱产品亮度(L*),木糖醇组绿色最深,a*值绝对值为1.62。麦芽糖醇和木糖醇均使样品贮藏稳定性有明显下降,赤藓糖醇组的稳定性与蔗糖组最为接近,脱水收缩值为1.33%。所有样品均表现出剪切变稀的假塑性,添加糖醇使样品粘弹性较蔗糖组有明显下降。麦芽糖醇组硬度和稠度最大,赤藓糖醇组粘聚性和粘度最小,涂抹性最佳。 相似文献
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Figueroa-González I Quijano G Ramírez G Cruz-Guerrero A 《Journal of the science of food and agriculture》2011,91(8):1341-1348
Owing to their health benefits, probiotics and prebiotics are nowadays widely used in yogurts and fermented milks, which are leader products of functional foods worldwide. The world market for functional foods has grown rapidly in the last three decades, with an estimated size in 2003 of ca US$ 33 billion, while the European market estimation exceeded US$ 2 billion in the same year. However, the production of probiotics and prebiotics at industrial scale faces several challenges, including the search for economical and abundant raw materials for prebiotic production, the low-cost production of probiotics and the improvement of probiotic viability after storage or during the manufacturing process of the functional food. In this review, functional foods based on probiotics and prebiotics are introduced as a key biotechnological field with tremendous potential for innovation. A concise state of the art addressing the fundamentals and challenges for the development of new probiotic- and prebiotic-based foods is presented, the niches for future research being clearly identified and discussed. 相似文献
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常用消毒灭菌法及其机理与应用 总被引:3,自引:0,他引:3
介绍了采用消毒灭菌方法,有加热消毒法,紫外线辐射法和化学药剂消毒法。常用化学药剂有醛类、含氯消毒剂、醇类消毒剂以及高锰酸钾、生石灰等,阐释了消毒与灭菌两个概念的区别。 相似文献
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Wim Verbeke Federico J.A. Pérez-Cueto Marcia D. de Barcellos Athanasios Krystallis Klaus G. Grunert 《Meat science》2010
This paper presents the combined mid-term findings of the consumer research components of two EU Sixth Framework Programme integrated projects concerning meat, ProSafeBeef and Q-PorkChains. The consumer pillar of ProSafeBeef carried out eight focus group discussions in May 2008, in France, Germany, Spain and the UK. Q-PorkChains conducted a large-scale, web-based, consumer survey in January 2008 in Belgium, Denmark, Germany, Greece and Poland. The first project provides a set of qualitative data from a small cohort of focus groups and the second a set of quantitative data from a larger consumer sample. This paper draws together the main findings of both projects and provides a comprehensive overview of European citizens’ and consumers’ attitudes towards and preferences regarding beef and pork. In general, consumers consider meat to be a healthy and important component of the diet. Consumers support the development of technologies that can improve the health attributes of meat products and guarantee eating quality, but they have a negative view of what they see to be excessive manipulation and lack of naturalness in the production and processing of beef products. In the Q-PorkChains study consumer and citizen segments are identified and profiled. Consumer segments were built upon the frequency and variety of pork consumption. The citizen segments were built upon their attitudes towards pig production systems. Overall, the relationship between individuals’ views as citizens and their behaviour as consumers was found to be quite weak and did not appear to greatly or systematically influence meat-buying habits. Future studies in both projects will concentrate on consumers’ acceptance of innovative meat product concepts and products, with the aim of boosting consumer trust and invigorating the European beef and pork industries. 相似文献
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果蔬可以提供营养, 有利于人类健康, 而果蔬的后熟及其与环境的相互作用会影响果蔬采后的质量和安全。对果蔬生物学过程的了解和掌握是减少果蔬采后损失和保障果蔬采后质量和安全的关键。在过去的10多年, 基于组学技术的系统生物学在了解果蔬后熟及其与环境相互作用的分子机制方面得到了越来越多的应用。本文对此做了细致的总结, 指出了存在的不足, 并提出了未来的发展方向。 相似文献
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