共查询到18条相似文献,搜索用时 93 毫秒
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板栗壳色素的提取工艺 总被引:3,自引:0,他引:3
以板栗壳为原料,研究提取其棕色素的工艺。在加热条件下,以碱溶的方法提取。确定了从板栗壳中提取棕色素的较佳工艺条件为:质量浓度为2.0%NaOH溶液、提取温度为80℃、提取时间为3次。为板栗壳色素的开发奠定了基础,也为板栗加工副产物的综合利用提供了一条新途径。 相似文献
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研究了以高梁壳为原料提取高梁色素的工艺,结果表明:用70%乙醇作提取剂,在60℃温度下提取2~2.5h,色素提取率可达6%。 相似文献
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荔枝壳棕色素的提取及稳定性研究 总被引:5,自引:0,他引:5
介绍以荔枝壳为原料提取棕色素的方法 ,研究了几种食品添加剂对该色素的影响 ,并对色素的耐热性、耐光性、耐氧化性、耐还原性等性能进行测试 ;结果表明 ,荔枝壳棕色素价廉易得 ,性质稳定 ,具有开发利用价值 相似文献
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以高梁壳为原料,用酸性乙醇提取高梁红色素。对高梁红色素的特性进行了探讨,结果发现,该色素为醇溶性色素,最大吸收峰值为490nm;该色素对酸碱、光、温度都较稳定,该色素耐还原性很好,但耐氧化性较差。再以高梁壳渣为原料,磷酸法制取粉状活性炭,通过正交试验探索了最佳工艺条件。制得的粉状脱色用活性炭,产品吸附指标符合LY216-79标准。这一研究对高梁壳的综合利用和开拓天然食用色素及活性炭的原料来源开辟了 相似文献
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对河北遵化所产的棕色板栗壳进行了色素提取和理化性能研究,研究表明:板栗壳色素水溶性好,对光,热的耐受性强,当pH为4-14时,色素稳定性好,对于多种金属离子的作用不显著,色素对氧化剂H2O2的耐受能力较差,对还原剂Na2SO3的耐受能力强。 相似文献
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板栗壳色素性质的研究 总被引:2,自引:0,他引:2
研究了板栗壳色素的紫外-可见吸收光谱、溶解性,以及pH值、金属离子、光、热、氧化剂、还原剂和常用食品添加剂对色素性质的影响。结果表明,板栗壳色素易溶于极性溶剂,在不同pH值水溶液下呈不同的颜色,有较好的耐热性和抗氧化还原性,金属离子Ca^2 、Mg^2 、Ba^3 、Na^ 、K^ 对色素水溶液颜色的影响较小,但Fe^3 、Pb^2 、Cu^2 有不良影响,食盐、蔗糖和葡萄糖对色素水溶液的颜色影响也小。 相似文献
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本研究以板栗苞为原料,采用醇水溶液为提取剂获得板栗苞多酚,然后采用膜分离技术提高其纯度,最后用板栗苞多酚进行了沉锗试验,获得了最佳工艺条件。1)选择以通常废弃板栗苞为原料,以乙醇水溶液为提取剂进行了板栗苞多酚的提取。建立了多酚的分析方法,绘制了工作曲线,确定了曲线方程,列出了提取率的计算方法。通过对提取剂种类、提取温度... 相似文献
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马蹄皮资源化利用研究 总被引:2,自引:0,他引:2
综述了马蹄皮资源利用研究现状,结果表明,当前可行的马蹄皮资源化利用技术包括提取棕色素、抗菌物质、抗氧化剂和生产保健饮料等,其中以提取天然抗菌物质和天然抗氧化剂更为引人注目。 相似文献
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《分离科学与技术》2012,47(2):267-277
The aim of this work was to study the extraction of phenolic compounds from chestnut bur and shell, both waste products of chestnut processing in the food industry. Two extraction techniques were compared—maceration with solvents and microwave-assisted extraction. The influence of the solvent used (water, 50% MeOH or 50% EtOH) and temperature (25-50-75°C) on extraction yield and extract total phenols content and FRAP, DPPH, and ABTS antioxidant activities was studied. In the conventional extraction, the yield was significantly higher for the bur (8.54–19.58%) than for the shell (2.91–13.27%); however, the shell extracts showed substantially greater properties. The best extract properties were achieved at 75°C using 50% MeOH for the bur and water for the shell and phenolic compounds with demonstrated antioxidant properties, as gallic acid esters of glucose and ellagic acid, were identified in these extracts by RP-HPLC-ESI-TOF. In addition, the aqueous extracts showed ability to inhibit the growth of gram positive and negative bacteria but not fungi. The kinetic of the extraction process was well fitted by the Peleg's model. The non-conventional microwave-assisted extraction slightly improved the chestnut bur extraction by reducing the extraction time. 相似文献
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A study on the removal of Cd2+ ions from aqueous solutions by acid formaldehyde pretreated chestnut (Castanea sativa) shell was conducted in batch conditions. The influence of different parameters: adsorption time, temperature (15, 25 and 35 °C) and initial concentration of Cd2+ ions (15.3, 50.5 and 87.3 mg L− 1), on cadmium uptake was analysed. Cadmium free and cadmium loaded chestnut shell were characterized by FTIR spectroscopy, which evidenced the functional groups involved in cadmium uptake. Cadmium adsorption equilibrium could be described by the Freundlich adsorption model at all the temperatures essayed, which predicted shell heterogeneity. The Cd2+ adsorption process by chestnut shell followed the pseudo second order kinetic model. Cadmium sorption capacity increased with decreasing temperature at an initial concentration of 15.3 mg L− 1 and with increasing initial cadmium concentration at a temperature of 25 °C. The second order kinetic constant, which increased with increasing temperature, was used to calculate the energy of adsorption as equal to 19.2 kJ mol− 1. 相似文献
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建立了烧结过程传热模型,利用Fluent软件对常规烧结及以10%, 20%, 30%(等能量输出)竹炭和板栗壳炭替代常规燃料进行烧结的温度场进行数值求解,计算值与测定值对比验证模型的可靠性,以料层最高温度和料层冷却速率对各方案进行评价. 结果表明,竹炭和板栗壳炭20%替代方案最高温度高于1573 K时的料层厚度分别为0.49和0.47 m,大于常规烧结及10%和30%替代方案,能有效提高烧结矿成块固结量;竹炭和板栗壳炭30%替代方案料层冷却速率小于120 K/min时的料层厚度分别为0.458和0.480 m,大于常规烧结及10%和20%替代方案,有助于提高烧结矿机械强度;用燃点较高的生物质炭替代常规燃料有利于提高料层最高温度,用燃点较低的生物质炭替代常规燃料有利于加快烧结速率. 相似文献