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无花果果汁澄清工艺的研究 总被引:1,自引:0,他引:1
马晓军 《广州食品工业科技》1998,14(2):30-32
本文就几种常用的果汁澄清方法在无花果果汁上的应用进行了研究比较。结果表明,果胶酶-胶胶-硅溶胶澄清法是无花果果汁澄清的较好方法,用此法生产澄清无花果是汁稳定可靠、易于操作,制得的果汁澄清度高并且可保持原有的风味 相似文献
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以无花果果干为原料研制澄清无花果果汁饮料。在单因素试验的基础上,采用正交试验确定无花果果汁饮料的最佳配方,同时对无花果果汁进行吸光度测试,以此来确定澄清效果。结果表明,澄清无花果果汁饮料的最佳生产方案为:30g无花果果干榨成汁100g,4℃冷澄清6h,加入0.3g50%的糖浆、0.5g0.5%的柠檬酸。所制得的无花果果汁饮料色香味俱佳,澄清透明,易于被大众接受。 相似文献
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酶法澄清余甘果汁研究 总被引:7,自引:2,他引:7
余甘果汁贮放期间会产生沉淀,本实验采用果胶酶和蛋白酶澄清余甘果汁,实验了两种不同澄清方法及酶的最佳作用温度,该法可使果汁澄清,贮放期间不产生沉淀。 相似文献
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壳聚糖澄清对沙棘果汁酚类成分的影响 总被引:3,自引:0,他引:3
通过Folin—ciocalteu比色法测定和HPLC检测分析,对壳聚糖澄清过程中沙棘果汁总酚含量以及一些酚类成分的变化进行了研究,结果显示:壳聚糖澄清对沙棘果汁中的酚类物质有所影响,总酚含量降低了17.2%,澄清后果汁中的儿茶酸、阿魏酸和香豆酸组分损失,没食子酸降低87%,槲皮素减少了62.5%,绿原酸含量变化不大。 相似文献
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详细阐述了野生红豆浆果的加工工艺、果汁的无菌处理、冷藏方法及果汁饮料的研发。由于红豆浆果的果胶含量较高(达0.3%以上),在果汁加工中采用添加果胶酶的方法,以提高果汁的出汁率,同时对果汁进行澄清处理,使最终果汁产品澄清透明,长期贮存无沉淀。 相似文献
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草莓汁澄清工艺研究 总被引:2,自引:0,他引:2
草莓汁的澄清是草莓汁加工工艺的重要环节,澄清效果会影响草莓汁的品质和货架期。以红颜草莓为原料,首先采用单因素及正交试验对果胶酶、壳聚糖澄清草莓汁的条件进行了优化,确定了果胶酶、壳聚糖澄清草莓汁的最佳作用条件,再使用果胶酶-壳聚糖复合法澄清草莓汁。结果表明,果胶酶最佳用量为0.015 g/L,壳聚糖处理草莓汁的最佳工艺条件为壳聚糖添加量0.6 g/L,水浴时间25 min,水浴温度55 ℃,草莓汁pH值3.3。采用果胶酶-壳聚糖(果胶酶0.015 g/L和壳聚糖0.6 g/L)复合法澄清草莓汁,透光率为97.3%,澄清效果优于单一澄清法,因此果胶酶-壳聚糖复合澄清法可作为一种良好澄清方法使用。 相似文献
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针对电浮法的特点,对电浮法在果汁饮料生产中的应用进行了分析,主要针对果汁的澄清,果汁的电化学脱氧和膨润土的活化三个方面进行了论述,分析表明:电浮法在果汁的生产过程中具有良好的应用前景。 相似文献
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为优化柠檬NFC果汁的加工工艺,本研究比较了琼脂絮凝法、酶解-吸附联用法、酶解-絮凝联用法和冻融细胞破碎法对柠檬原果汁的澄清效果,并建立了柠檬原果汁及经不同澄清工艺处理获得的柠檬清汁贮存期间柠檬苦素降解模型。结果显示,四种澄清工艺均可明显提高柠檬果汁的透光度并维持品质;酶解-吸附联用法对柠檬原果汁的澄清效果要优于其它三种方法,但显著降低了清汁中总酚和抗坏血酸含量(P<0.05),该法最优参数为果胶酶添加量0.3%,纤维素酶添加量0.15%,酶解时间2 h,活性白土添加量为4%;经澄清处理的柠檬清汁样品在贮存期间柠檬苦素含量降解的速率常数(k)与Arrhenius数学模型的相关性高,且模型为一级反应动力学方程。经酶解-吸附联用法澄清处理的柠檬清汁中柠檬苦素降解反应活化能(Ea)显著(P<0.05)低于其余三种澄清处理法,说明该体系下柠檬苦素更易发生降解。因此,琼脂絮凝法、酶解-吸附联用法、酶解-絮凝联用法和冻融细胞法均可用于柠檬NFC原果汁的澄清,但在实际果汁生产中应考虑使用对功能性物质破坏小的方法。 相似文献
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N. B. Kyriakidis 《Food Hydrocolloids》1999,13(6):270
In natural orange juice, pectin is the major constituent responsible for cloud stability. In adulterated and imitation orange juices, for technical reasons, cloud stability is effected by different natural or synthetic hydrocolloids. Pectinesterase, an enzyme specific for pectin hydrolysis, was used to detect substitution of natural pectin of orange juice by other hydrocolloids. Natural orange juice, imitation orange juice and mixtures of them were used in this study. In pasteurized orange juice samples, pectinesterase was added at 20 mg/100 ml of juice. Mixtures were heated at 50°C in a water bath for 24 h and the percentage of clarification, as well as the amount of precipitate formed after centrifugation were measured. A linear correlation was found to exist between natural orange juice percentage in the natural–imitation orange juice mixtures and precipitate formed. A second order relation was found to exist between the percentage of the natural orange juice in the natural–imitation orange juice mixtures and the degree of clarification of orange juice. The method was used successfully for the detection of addition of extraneous hydrocolloids in orange juice for adulteration purposes. 相似文献
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果胶酶催化条件及澄清果汁的研究 总被引:8,自引:0,他引:8
本试验以本系分离选育的果胶酶菌种为试验菌种。在摸清最适作用温度和pH的前提下,研究证实所提供的四种酶(X_1、X_2、Y_2、Y_3)对苹果醋,桔子汁、苹果汁、山楂汁、樱桃汁和草莓汁等均有明显的澄清作用,而对梨汁、西瓜汁等澄清作用不明显。其中,Y_2对苹果醋和苹果汁澄清作用最好,其次为X_1、X_2、Y_3;X_2对山楂汁澄清作用最好,其次为X_1、Y_2和Y_3;Y_3和X_2对桔子汁澄清作用最好,X_1和Y~2次之;Y_2、X_1、X_2对草莓汁澄清作用最好,Y_3次之。 相似文献
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The effects of clarification agents and methods on pomegranate juice quality were studied. Fruits were pressed as whole, and extracted juice was clarified with gelatin, polyvinylypolypyrrolidone (PVPP) and natural sedimentation. In order to determine the effects of these clarifying techniques on product quality, pH, total phenolic substances (TPS), anthocyanin, turbidity, and total colour density tests were applied to each sample. In clarification, the main purpose was to reduce the amount of phenolic substances. Phenolic substances were controlled in each clarification method. The most effective method was the application of 1 g/L gelatine for clarification. Sensory evaluation also applied for clarified juices and gelatin application was selected by panelists to be superior. 相似文献