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高Vc复合绞股蓝袋泡茶的研制 总被引:3,自引:0,他引:3
用苦丁茶、刺梨原果汁与绞股蓝混合,解决了股蓝袋泡茶口感差的问题,并能大大提高产品Vc含量。最优配比为:单纯绞股蓝茶:单纯苦丁茶:刺梨原果汁=6:4:15。最佳烘制条件为80℃、15min。制得的高Vc复合绞股蓝袋泡茶口感好,Vc含量达902.19mg/100g,是绿茶Vc含量的3 ̄9倍,是红茶Vc含量的22.6 ̄50.1倍。 相似文献
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目的优化荷叶柚子复合碳酸饮料的配方。方法以柚子皮、柚子肉、荷叶为原料,辅以柠檬汁、糖等配料,利用单因素和响应面实验设计对荷叶柚子复合碳酸饮料的配方进行优化。结果通过对成品的感官评价,理化指标和微生物指标等测评,确定最佳的添加量配比为60%(m:V)的糖水20mL、柚子皮荷叶水添加量为25 mL、柚子汁添加量25 mL、柠檬汁添加量5 mL,气泡水定容至250 mL。结论通过该配方制作出的饮品色泽均匀,颜色微黄,微气泡且口感柔滑,口味酸甜微苦,饱满而非尖酸,能闻到一股淡淡的柚子清香,品尝后口有余香。 相似文献
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目的 建立袋泡茶水中环氧氯丙烷(ECH)的液相微萃取-气相色谱-质谱联用(LPME-GC-MS)分析方法.方法 通过溶剂棒液相微萃取法对茶水中的环氧氯丙烷进行富集,气相色谱进行分离,质谱定性定量.结果 环氧氯丙烷的检出限为0.18 μg/ml,线性范围0.36 ~7.30 μg/ml(r2 =0.999).以不含环氧氯丙烷的茶水为本底,测定方法高浓度平均加标回收率为93.6%,低浓度平均加标回收率为90.3%,相对标准偏差小于10%.结论 本方法操作简便,灵敏度、准确度及精密度较好,具有一定的实用性. 相似文献
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Choe JH Jang A Lee ES Choi JH Choi YS Han DJ Kim HY Lee MA Shim SY Kim CJ 《Meat science》2011,87(1):12-18
This study aimed to evaluate the oxidative and color stability of cooked ground pork containing lotus leaf powder at 0.1 (LP1) and 0.5% (LP2) as well as barley leaf powder at 0.1 (BP1) and 0.5% (BP2) during refrigerated storage for 10 days. The oxidative stability of these powders was compared with butylhydroxytoluene (BHT). LP1 had higher a* and lower b* values than the control (-) over 4 days (p<0.05). The pH values of the ground pork samples made with addition of LP and BHT decreased until day 4 and then increased. Thiobarbituric acid-reactive substance (TBARS) values were lowest in LP2 on day 10 (p<0.05). The ground pork samples containing LP and BP had lower peroxide values (POVs) and conjugated dienes (CD) compared to the control (-).These results indicate that LP or BP can be incorporated into ground pork to effectively retard oxidation after cooking. 相似文献
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悬浮型芦荟紫苏叶复合保健饮料的研制 总被引:6,自引:0,他引:6
以芦荟和紫苏叶为主要原料,利用正交试验配合感官评价探讨复合饮料的最佳配方,并筛选出了最佳稳定剂组合与灭菌工艺条件,研制出清香可口、风味独特,具有营养保健功能的新型纯天然复合饮料。 相似文献
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Lotus stems were treated with sodium hydroxide followed by sodium chlorite to prepare lotus fibers. The lotus fibers were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD), and thermogravimetric (TG) analysis. The crystallinity and crystallinity index of lotus fibers are 62.11 and 62.29%, respectively. The content of cellulose in lotus fibers after being purified with sodium chlorite is improved and reaches 69.74%. The moisture regain of lotus fibers was studied and the results show that moisture regain of purified lotus fibers is 6.87%. The influences of concentration of sodium chlorite on tensile strength and breaking elongation of lotus fibers were investigated. The tensile strength and breaking elongation of lotus fibers both decrease as the concentration of sodium chlorite increases. The results are expected to provide valuable guidance for preparing lotus fibers from lotus stems through chemical treatment. 相似文献
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建立西洋参中α-六六六(α-BHC)、4,4'-滴滴涕(4,4'-DDT)等20种有机氯农药残留量的一种简便有效的气相色谱分析方法,对陕西留坝县西洋参GAP生产基地不同种植地块、不同生长年限西洋参中有机氯农药的种类和含量进行测定,并探讨不同生长年限西洋参中有机氯农药富集规律。样品有机氯农药残留用正己烷-乙酸乙酯(1:1)溶液提取,通过弗罗里硅土小柱净化,正己烷-乙酸乙酯(1:1)溶液洗脱后浓缩定容,采用DB-17毛细管柱分离,气相色谱-电子捕获检测器(gas chromatography -electron capture detector,GC-ECD)检测,以保留时间定性,外标法定量。结果表明:10个西洋参样品中除异狄氏剂未检出外,标准溶液中的其他19种有机氯农药均有检出。不同种植地块同一生长年限西洋参有机氯农药残留含量差异较大,西洋参中有机氯农药残留含量基本呈现4年生西洋参高于3年生西洋参和5年生西洋参的规律。实验建立的方法简便有效,适用于西洋参中有机氯农药残留量的测定。 相似文献
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荷叶黄酮对油脂抗氧化作用研究 总被引:1,自引:0,他引:1
以大豆油和猪油作为抗氧化实验基质,用70%乙醇超声波法提取荷叶中黄酮类物质,研究荷叶黄酮对油脂基质抗氧化作用。结果表明,在大豆油基质中,质量分数为0.12%荷叶黄酮提取液对抑制大豆油氧化具有较好作用,0.02%荷叶黄酮抗氧化活性低于柠檬酸和BHT,但高于Vc;在猪油基质中,质量分数为0.1%荷叶黄酮提取液能有效抑制猪油氧化,0.02%荷叶黄酮抗氧化活性低于BHT,但高于Vc和柠檬酸;且质量分数为0.02%柠檬酸可大大增强荷叶黄酮在油脂基质中抗氧化作用。 相似文献
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壳聚糖复合涂膜保鲜鲜切莲藕的研究 总被引:1,自引:0,他引:1
采用壳聚糖、海藻酸钠和黄原胶为涂膜材料,按照L9(34)正交试验制作不同配比的壳聚糖复合膜,对莲藕进行涂膜保鲜.结果表明:壳聚糖复合膜的最佳配比为壳聚糖0.9%、海藻酸钠0.1%、黄原胶0.08%时,可有效保持莲藕的感官品质,可将莲藕的失重率保持在28%以下,呼气强度的峰值保持在26%以下,12 d 时可滴定酸含量(TA)0.11%、可溶性固形物含量(SSC)4.9%和VC (12.06 mg/100 g)的损失量得到有效的控制,壳聚糖和黄原胶的保鲜效果达到显著水平. 相似文献