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《食品工业》2015,(4)
以牛蒡、红枣、枸杞为主要原料,研制风味独特、营养丰富的复合保健饮料。采用超声波浸提法探讨了红枣汁、枸杞汁的最佳浸提工艺,通过正交试验确定了复合饮料的最佳配方及生产工艺参数,并对饮料的稳定性进行了研究。结果表明,红枣汁最佳提取工艺为浸提温度70℃,浸提时间10 min,p H 4.0,料液比1∶7(g/m L);枸杞汁最佳提取工艺为浸提温度50℃,浸提时间15 min,p H 5.0,料液比1∶15(g/m L);复合饮料的最优配方为,牛蒡汁与红枣汁体积比为7∶3,枸杞汁10%,白砂糖6%,柠檬酸0.02%;复合饮料的最佳稳定剂,海藻酸钠0.10%和黄原胶0.05%。 相似文献
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胡萝卜、荸荠、葛根复合保健饮料的研制 总被引:1,自引:0,他引:1
以现代营养知识和传统的中医药理为依据 ,研究以胡萝卜、荸荠、葛根为原料 ,经现代饮料加工技术 ,提取其汁 ,采用正交试验 ,研制出最佳生产配方和最佳工艺条件 ,生产出口味独特营养丰富 ,具有保健作用的功能性复合饮料。 相似文献
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以现代营养知识和传统中医理论为依据,研究以番茄、柑橘、芹菜为原料,经现代饮料加工技术,提取其汁,采用正交实验,研制出最佳生产配方和最佳工艺条件,生产出风味独特营养丰富并极具保健作用的功能性复合饮料。 相似文献
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研究了采用糯米汁、枸杞、红枣的汁液按一定比例混合,并找出其最佳原料配比和保持该保健饮品稳定性的最佳条件,最终制得营养丰富、风味浓郁适合当今饮食潮流的健康饮品。 相似文献
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山楂、大枣、枸杞、菊花天然复合保健饮料的工艺研究 总被引:5,自引:0,他引:5
本研究以山楂、大枣、枸杞、菊花4种药食同源食品为原料,添加白砂糖、柠檬酸、蜂蜜辅料经科学加工调配而成一种具有抗衰老、抗氧化、降压明目、益智的保健饮料.通过正交试验及方差分析,确定该饮品的最佳配方为:复合汁30ml、白砂糖4g、柠檬酸0.03g、蜂蜜2.5ml、水67ml(上述均为质量百分数).通过实验,确定产品最佳稳定剂CMC-Na添加量为0.03%. 相似文献
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The reduction in pH was higher in aqueous solutions than in ethanolic solutions. Moreover, pH was lower in glycine compared
to diglycine and triglycine in both aqueous and ethanolic solutions. Maillard reaction products (MRPs) derived from diglycine
had a greater absorbance at 294 and 420 nm in ethanolic solution than an aqueous solution. The loss of glucose was higher
in ethanolic MRPs solution than in aqueous solutions. The glycine oligomer content in ethanolic solutions remained much higher
than that in aqueous solutions. Absorption in the ultraviolet (UV)-vis spectra was higher in MRPs derived from the ethanolic
solution than in those derived from the aqueous solution. The molecular weights of MRPs derived from an ethanolic solution
showed higher peak intensities than those derived from an aqueous solution, whereas the major peaks of the molecular weight
in an ethanolic solution were slightly different from those in an aqueous solution. 相似文献
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Tsuruta T 《Journal of Bioscience and Bioengineering》2004,97(4):275-277
The adsorption of uranium from an acidic solution by microbes was examined. High uranium adsorption ability was exhibited by actinomycetes. Streptomyces levoris cells could adsorb about 380 micromol of uranium per gram dry cells from the solution. The cells could adsorb uranium over a wide acidic pH range and very rapidly. The amount of uranium adsorbed from a solution containing uranium and thorium was affected by the thorium concentration. The amount adsorbed was reduced and an uranyl-thorium ion exchange reaction occurred in the case of adsorption from a solution containing both metals. 相似文献
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詹艺舒 《食品安全质量检测学报》2022,13(6):1889-1894
目的 结合国家标准中铜绿假单胞菌的检测方法,探究适合铜绿假单胞菌定量的检测方法.方法 设计两种定量检测方法对国家标准方法进行优化:稀释过滤法,先将样液进行稀释,对每个稀释度的样液抽滤250 mL;线性过滤法,分别抽滤1、5、10、20、30、40、50 mL样液,计算抽滤液中的菌数,建立回归方程,并由回归方程计算得到每... 相似文献
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The mechanical properties of chitosan–soy globulin capsules depend strongly on the pH values of chitosan and soy globulin solutions in the polyelectrolyte complex formation. When a solution of chitosan was dropped into a solution of soy globulin, a thin chitosan-globulin membrane was formed on the surface of the capsules. These capsules were mechanically weaker than the capsules made by complex formation between sodium alginate and chitosan. In this study 5.0 wt% globulin solution and 2.0 wt% chitosan solution were used. The diameter of the capsules obtained was approximately 3 mm. By immersing the capsules into alkaline solution the composite capsule, having a gel core of chitosan, was obtained. Mechanical properties of the capsule were estimated from compressive force–deformation curves derived from large deformation experiments. The mechanical strength of the capsule was found to depend on the pH values of the chitosan and globulin solutions. The capsules prepared from the chitosan solution with pH 5 and the globulin solution with pH 8 showed high mechanical strength. Moreover, reaction time for capsule formation had an effect on the strength of the capsule. 相似文献
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干酪乳杆菌LCR 6013经10.00 mg/L的亚硝酸钠诱导和溶菌酶破壁,粗酶溶液分别经过30%和60%饱和硫酸铵溶液分级沉淀,沉淀被溶解和透析后分别得蛋白液Ⅰ和蛋白液Ⅱ,通过阴离子DEAE Sepharose Fast Flow和葡聚糖凝胶G-100层析柱分离纯化。蛋白液Ⅱ纯化得亚硝酸盐还原酶蛋白(NiR),在加入细胞色素C才能降解亚硝酸盐,LCR6013的每升发酵液得到0.54 mg活性酶蛋白,其NiR比酶活为1851.20 U/mg,得率为2.08%,纯化后其NiR比活力提高16倍,经SDS-PAGE电泳确定LCR6013 NiR的单体分子质量约为45 ku。同时,由蛋白液Ⅰ纯化的蛋白加入LCR6013的NiR中,表现降解亚硝酸盐的活力,经鉴定为电子供体蛋白(El D),经SDS-PAGE电泳确定LCR6013中ElD的单体分子质量约为13 ku,与细胞色素C的单体分子质量相同。LCR6013的ElD、细胞色素C、FeSO_4和Na_2SO_3分别协同NiR能在48 h内将75.00 mg/L的亚硝酸钠完全降解,而LCR6013的ElD和细胞色素C降解效果最好。 相似文献
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以萱藻为原料,采用碱提法提取褐藻胶,探讨萱藻褐藻胶的最佳漂白工艺条件以及褐藻胶溶液的流变学特性。实验结果表明:用次氯酸钠做漂白剂,每600mL滤液加3mL有效氯浓度为4%的次氯酸钠溶液,即3:600,pH10.5左右,漂白时间40min,漂白温度35℃,能够得到较满意的漂白效果;萱藻褐藻胶溶液粘度随剪切速率的增加而降低,是假塑性流体,具有触变性;褐藻胶溶液具有粘弹性,在低频率区域体系以粘性为主,高频率区域体系以弹性为主;此外,温度、溶液质量分数、盐、蔗糖也会影响褐藻胶溶液的粘度。 相似文献
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本文以鱿鱼内脏为原料提取蛋白酶.考察了各因素对提取效果的影响,包括用于提取的NaCl溶液浓度、内脏和提取液的固液比、提取温度、提取时间等.此外,根据蛋白质等电点沉淀原理,调粗酶液的pH值去除杂蛋白;并进一步比较了各种絮凝剂去除粗酶提取液中杂蛋白的效果.结果表明:NaCl溶液浓度为0.5%,固液比为1.0∶1.5,常温下提取60 min可达到较好的提取效果,蛋白酶的回收率达到96.06%,比酶活达到1.33 U/mg.调粗酶液的pH值为4.5左右,杂蛋白去除效果较好;Fe2(SO4)3是较好的絮凝剂,向粗酶液中添加1% Fe2(SO4)3溶液,当添加比为4:1(V/V,粗酶液Fe2(SO4)3溶液)时,进一步去除杂蛋白的效果较好,蛋白酶的回收率达80.33%,比酶活达到9.37 U/mg. 相似文献
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为研究天然棕色棉色素的有效提取条件,对乙醇/水溶液体系提取天然棕色棉色素的组分进行了研究。不同乙醇浓度溶剂对棕棉色素的提取组分有明显影响。研究表明:棕棉色素提取物分为较易分离(保留时间1-5min)和难分离(保留时间7-17min)两部分有色成分;棕棉色素具有很强的亲水特性,90%以上乙醇浓度对其提取效率很低,不适宜对棕棉色素物质的提取;0%乙醇/水溶液适合保留时间为1.4min色素物质的提取;30%乙醇/水溶液适合保留时间为1.7min、2.2min和9.6min色素物质的提取;50%乙醇/水溶液适合保留时间为14.9min色素成分的提取。 相似文献