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不同截流分子量的超滤膜和南瓜汁澄清效果的研究 总被引:1,自引:0,他引:1
在南瓜澄清汁加工中分别采用PSA1.5、PSA3.0、PSA6.0和PSA8.0四种不同类型的平板超滤膜进行超滤澄清处理。结果表明,四种膜对南瓜汁均有明显的澄清效果,其透光率(λ=420nm)由原汁的78.9%分别上升为99.4%、98.9%、98.7%和86.9%;除果胶和蛋白质外,膜的截留分子量(MWCO)对可溶性固形物、还原糖、pH、矿质元素和总酸等含量均无显著影响;澄清汁贮存4个月后,只有PSA1.5和PSA3.0超滤汁无沉淀现象产生,稳定性良好。 相似文献
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营养南瓜汁饮料的工艺研究 总被引:1,自引:0,他引:1
采用酶处理南瓜浆液,可降低其粘度,提高出汁率,维持该体系的稳定性;确定了南瓜汁饮料生产的工艺条件,用0.3%稀醋酸溶液热烫南瓜5min,Novo公司提供的果浆酶制剂对南瓜浆进行酶解,复合稳定剂(果胶:黄原胶=1:1)用量为1.6g/kg。 相似文献
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以新鲜杏肉为主要原料设计了混浊型果汁饮料的加工工艺,采用正交实验设计方案,以感官风味作为评价指标,优选出杏汁、蔗糖和柠檬酸的最佳复配比为:14%杏汁+8%蔗糖+0.08%柠檬酸,并确定复合稳定剂的最佳组合为:0.10%果胶+0.15%CMC+0.10%黄原胶。 相似文献
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以新鲜杏肉为主要原料设计了混浊型果汁饮料的加工工艺,采用正交实验设计方案,以感官风味作为评价指标,优选出杏汁、蔗糖和柠檬酸的最佳复配比为:14%杏汁+8%蔗糖+0.08%柠檬酸,并确定复合稳定剂的最佳组合为:0.10%果胶+0.15%CMC+0.10%黄原胶。 相似文献
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以甜菜汁为原料,在分析其功能成分的基础上,经预处理、调配等工艺研制出甜菜汁运动饮料。通过单因素试验和正交试验确定其最佳配方:甜菜汁2.8%、CMC-Na0.1%、食盐0.1%、柠檬酸0.07%、白砂糖3.46%、葡萄糖0.87%、13-环糊精0.15%、抗坏血酸0.07%。该产品口感良好、组织稳定,经检测其理化指标和微生物指标均符合运动饮料的要求。 相似文献
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通过单因素试验和正交试验,确定了聚赖氨酸在玉米汁饮料中的最大使用量、最佳使用量,并确定了在玉米汁饮料中与聚赖氨酸组合的最佳制剂以及复配防腐剂的最佳配方。试验结果为:玉米汁饮料中使用聚赖氨酸的最大范围是0.02%;玉米汁饮料中单独使用聚赖氨酸的最适量为0.003%;玉米汁饮料添加最适聚赖氨酸浓度为0.003%,甘氨酸浓度为0.5%;防腐剂复配最佳组合为0.003%聚赖氨酸、0.5%甘氨酸、0.05%山梨酸钾、0.03%双乙酸钠、0%Nisin、0.003%EDTA。在玉米汁饮料中添加上述制剂,保鲜期可达到6d。 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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研究建立了螺虫乙酯及其4种主要代谢物在猕猴桃及土壤中的残留分析方法。样品用乙腈提取后,经PSA净化,高效液相色谱质谱联用仪检测,外标法定量。结果表明:在0.01~2.00mg/kg的添加水平下,螺虫乙酯及代谢产物在猕猴桃和土壤中的回收率为73.97%~110.52%,相对标准偏差分别为1.96%~7.91%。采用所建方法,测定螺虫乙酯及代谢产物在猕猴桃和土壤中的残留及消解动态。螺虫乙酯被施用到猕猴桃和土壤中后均迅速降解为B-enol、B-keto。在猕猴桃中螺虫乙酯、B-enol呈逐渐降低的趋势,而B-keto和B-mono呈逐渐升高的趋势;在土壤中螺虫乙酯、B-enol、B-keto均呈逐渐降低趋势,B-mono和B-glu在样品中均没有检出。螺虫乙酯和B-enol在土壤中的降解速度(1.42 d、1.99 d)快于在猕猴桃上的降解速度(4.08 d和6.39 d)。以3000倍液稀释液喷施2次,28 d后,猕猴桃中螺虫乙酯母体的残留量为0.06 mg/kg,高于我国制定的0.02 mg/kg的最大残留限量值,在猕猴桃上的安全使用剂量还需要进一步研究。 相似文献