苦瓜啤酒的生产技术

文章介绍了苦瓜基汁苦瓜啤酒的工艺流程,阐述了生产过程的操作步骤和要求,并提出了苦瓜啤酒的质量标准。     

沙棘叶多酚在苹果汁保鲜中的应用

沙棘叶多酚是从沙棘叶里提取出来的一种植物多酚,由于植物多酚的结构是多样性的,所以沙棘叶多酚具备多种生物活性。在沙棘叶多酚中具备一种较为特殊的活性,这就是抑菌活性。基于其抑菌活性的特点,人们可以将沙棘叶多酚应用于苹果汁保鲜中。由于沙棘叶多酚是一种天然的植物多酚,所以对人体并不会产生副作用,人们可以将其广泛地应用于苹果汁保鲜中。本文从沙棘叶多酚的提取、沙棘叶多酚的抑菌机制及在苹果汁保鲜中的应用等角度出发说明沙棘叶多酚在食品保鲜中的价值。     

我国开发浓缩苹果汁期货的必要性和可行性分析

我国是世界第一大苹果和苹果汁生产国,苹果汁出口占据世界贸易量一半以上。分析我国推出浓缩苹果汁期货在抵御价格风险、提高果农收入、赢得反倾销诉讼、促进产业发展等方面的必要性。同时进一步从苹果汁现货市场发育程度、产业规模、厂商数量、交割标准制定等方面进行可行性分析。浓缩苹果汁期货的上市,可以使我国牢牢掌握苹果汁的定价权,促进整个苹果产业链的健康发展。     

Tradeoffs between sensory attributes and organic labels: the case of orange juice

Researchers have investigated the role of sensory attributes and organic labels on consumers’ preferences and perceptions of food, but few has examined whether sensory attributes are relevant for consumers who prefer organic food and the extent to which sensory attributes influence consumer's marginal willingness to pay for organic food. The objective of this study is to determine how sensory attributes and organic label work together to influence consumer's stated preference and marginal willingness to pay for orange juice. To achieve this, we conducted a blind sensory evaluation of two orange juices followed by a discrete choice experiment to determine the extent to which consumer's stated preference for orange juice labelled as organic is affected by sensory experience preceding the choice experiment. Random parameter logit models and latent class conditional logit models are used to explain stated preference. Results indicate that the effect of sensory attributes on consumer's marginal willingness to pay differed by organic juice and conventional juice.     

荔枝系列产品深加工技术

介绍了糖水荔枝罐头、荔枝汁、荔枝酒、速冻荔枝等产品的加工技术。     

渗透脱水技术在农产品绿色物流中的应用

为达到节约资源和降低能源消耗,实现绿色物流,运用SWOT分析技术分析绿色物流现状,采用渗透脱水技术,处理新鲜的蔬菜。得出影响红萝卜渗透脱水关键因素的主次顺序,脱水溶液种类和脱水时间选择。试验结果表明对红萝卜渗透脱水后再进行振动流化床干燥,食用时再复水,能实现较好的绿色效益。     

The Impacts of Retail Promotions on the Demand for Orange Juice: A Study of a Retail Chain

This study examined the impacts of retail promotions on the demand for five brands of orange juices for a retail chain (referred to as Retailer X) and its competitors using the Rotterdam model. Results show that the combination of feature ads and displays had the largest impacts on retail revenue among the four promotional tactics considered, whereas temporary price reductions had no advertising impacts on retail revenue. Results also show that when Retailer X promotes an orange juice (OJ) brand using any of the tactics, a larger portion of the increased demand for the promoted brand comes from reduced demand for other brands of OJ in the same store or chain.A smaller portion comes from the decreased demand in Retailer X's competing stores in the same trading area.     

D-异抗坏血酸钠对苹果汁色泽的影响

本实验以苹果汁的吸光值为指标,探讨了D-异抗坏血酸钠在不同添加量、温度、时间和pH条件下对苹量汁色泽的影响。结果表明：各因素对D-异抗坏血酸钠护色效果的主次顺序为：pH〉时间〉D-异抗坏血酸钠溶液浓度〉温度,D-异抗坏血酸钠对苹果汁护色的最佳工艺条件为：D-异抗坏血酸钠的添加浓度为140 mg/L,处理温度为35℃,放置时间为50 min,调节pH为3。在最佳工艺条件下加入D-异抗坏血酸钠可使苹果汁保持原色不褐变。     

果汁褐变机理研究进展

纵观可知,为充分实现水果附加值的全面强化,可运用果汁加工这一有效的措施途径,旨在合理规避由于果汁未能及时出售而造成的经济损失情况出现。然而,在果汁加工进程当中,果汁褐变始终是果汁加工行业所面临的巨大难题,基于此进行研究显得十分重要。     

玫瑰红枣牛初乳冻干粉的研制及其抗氧化活性研究

以玫瑰花预处理沉淀物、红枣浓缩汁、低聚果糖和赤藓糖醇为主要研究对象,以感官得分为评价指标,通过单因素试验和正交试验方法确定玫瑰红枣牛初乳冻干粉的最佳配方,并进一步测定玫瑰红枣牛初乳冻干粉对DPPH自由基、超氧阴离子自由基和对羟基自由基的清除率,评价玫瑰红枣牛初乳冻干粉抗氧化活性.结果表明,玫瑰花预处理沉淀物的最佳添加量为2.5％,红枣浓缩汁的最佳添加量为5％,低聚果糖的最佳添加量为7.5％,赤藓糖醇的最佳添加量为17.5％,因此,玫瑰红枣牛初乳冻干粉的最佳配方为玫瑰花174.8％,红枣浓缩汁5％,N-乙酰神经氨酸5％,透明质酸钠2％,胶原蛋白肽40％,弹性蛋白0.2％,雨生红球藻5％,低聚果糖7.5％,复配营养强化剂(维生素C+维生素E+烟酸+麦芽糊精)1％,赤藓糖醇17.5％,生鲜牛初乳138.8％.体外抗氧化试验得到玫瑰红枣牛初乳冻干粉对O2-、DPPH和·OH的清除率分别为77.41％、87.68％和57.13％,显著高于对照组(P<0.05),可见玫瑰红枣牛初乳冻干粉具有抗氧化活性,为深度开发牛初乳冻干粉新方向提供参考.