共查询到20条相似文献,搜索用时 93 毫秒
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"米邦塔"仙人掌汁的营养特性及酶法澄清研究 总被引:5,自引:0,他引:5
对仙人掌汁营养成分及果胶酶法澄清仙人掌汁的工艺条件进行研究。结果表明,仙人掌汁中高钾低钠,钾钠比1314:1,SOD活力103.97U/mL,多糖1.96%,由成分分析可知,仙人掌汁是一种集多功能成分于一身的营养物质;采用响应面分析确定果胶酶澄清汁液时的最佳酶解工艺备件:酶加量0.14g/L、酶解时间1.8h、CaCl2添加量0.215g/L、酶解温度50℃、反应液pH4.5,所得汁的透光率达到94.2%。 相似文献
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建立准确测定甘蔗糖汁酚类色素没食子酸含量的高效液相色谱法。采用Hypersil BDSC18柱(4.6mm×250mm,5μm),流动相为乙腈-0.05%磷酸(5:95),检测波长是280nm,流动相流速为1.0mL/min。没食子酸线性范围为20~100mg/L,回归方程Y=15960X-4749,相关系数0.9991,检出限0.22mg/L,平均加标回收率为101.45%(RSD为1.13%)。样品清汁、清糖浆配成浓度15°Bx后,过0.45微滤膜,测定滤液中没食子酸含量,分别是21.70、17.06mg/L。结论:高效液相色谱测定方法准确、可靠,可用于甘蔗糖汁色素中没食子酸的检测。 相似文献
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Fabiane Hamerski Vítor R. da Silva Marcos L. Corazza Papa M. Ndiaye Arislete D. de Aquino 《International Journal of Food Science & Technology》2012,47(2):422-428
This paper reports a study of sugar cane juice carbonation and the evaluation of variables effects such as pH, carbonation time and temperature on industrially relevant parameters for the quality of sugar cane juice. Three different batches of sugar cane juice were evaluated using a complete two‐level factorial design with central point performed in triplicate. From results in this work, it can be seen that the higher sucrose concentrations and lower percentage of total soluble solids and reducing sugars were obtained in clarified juices with the maximum values for pH, time and reaction temperature (9.5, 60 min and 80 °C). The temperature favoured the removal of starch, phosphate and turbidity. Colour removal reached a maximum of 88–93% among the batches. The optimum clarification condition using carbonation procedure can be achieved between 20 and 40 min, at pH values between 8.0 and 9.5 and temperature condition at 80 °C. 相似文献
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为得到澄清的甘蔗汁,提高甘蔗汁的利用价值。考查了反应时间、两性聚丙烯酰胺的用量、反应温度和甘蔗汁的p H对甘蔗汁透光率的影响,在单因素基础上,利用L16(45)正交实验研究了最优组合和因素的主次关系,比较了原甘蔗汁与澄清后甘蔗汁的主要理化指标,并利用红外光谱和紫外光谱进行了表征。结果表明甘蔗汁澄清的最优组合:反应时间为20 min、絮凝剂用量为8 m L、反应温度为60℃和p H为5,因素的主次关系依次为p H、絮凝剂用量、反应温度和反应时间。在此条件下澄清后甘蔗汁透光率可达到94.7%。经澄清后的甘蔗汁较原甘蔗汁的VC、可溶性固形物、总糖和蛋白质等的含量有所下降,并且还有一定量的两性聚丙烯胺残留在甘蔗汁中。 相似文献
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Katia Rezzadori Rodrigo R. Petrus Silvia Benedetti Claudimir A. Carminatti José C. C. Petrus 《International Journal of Food Science & Technology》2013,48(1):1-9
The aim of this study was to determine the physico‐chemical, microbiological, rheological and sensory characteristics of sugar cane juice with passion fruit pulp (5% w/w) added and which had been submitted to microfiltration and pasteurisation (90 °C/30 s; 95 °C/30 s) processes. The results showed that the juices obtained after the microfiltration and pasteurisation processes had low microbial counts. The microfiltered juice showed a reduction in the soluble solids, acidity and vitamin C content (P = 0.05), while the pasteurised juice showed no change in these parameters (P > 0.05) in relation to the natural sugar cane juice, with the exception of vitamin C, which was not detected after the thermal treatment. In relation to the rheological properties, Newtonian behaviour was observed for both microfiltered and pasteurised juices. The sensory tests on a hedonic scale showed good acceptance of both juices (microfiltered and pasteurised). 相似文献
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仙人掌清汁饮料的研制 总被引:1,自引:0,他引:1
研究了仙人掌清汁饮料的西方和工艺流程,主要解决仙人掌汁饮料的澄清问题,结果表明,使用0.05%高效饮料澄清剂澄清15%仙人掌饮料,效果显著,工艺简单,成本低廉,澄清后经过调配加工,可制成具有较好保健作用和凉爽感的仙人掌清汁饮料。 相似文献
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为了研究取代SO2的新型糖用澄清剂,以壳聚糖(CTS)为原料、氯乙酸(CA)为改性剂,采用微波辐射技术制备羧甲基壳聚糖。以该产物对蔗汁澄清的脱色率和纯度差为评价指标,优化制备条件,使用扫描电镜(SEM)、红外光谱仪(FT-IR)及核磁共振(1H-NMR)分析产物性能及表征结构。结果表明,在mNa OH∶mCTS=5∶1,微波功率600W,辐射时间12min,mCA∶mCTS=6∶1条件下,所制备的羧甲基壳聚糖为N,O-羧甲基壳聚糖,水溶性得到改善、对蔗汁中带电胶体的吸附范围及电中和性能有所增加;其对蔗汁澄清的脱色率和纯度差分别达50.45%和1.63%,通过对比亚硫酸法澄清工艺的实际生产数据,认为羧甲基壳聚糖可以取代SO2作为糖用澄清剂应用于蔗汁澄清过程。 相似文献