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利用风味蛋白酶水解羊骨粉,并对4个水解指标做相关性分析。各指标之间均显著相关,与水解度的相关性依次为短肽得率(0.926)>多肽生成量(0.805)>氨基酸态氮(0.680)。响应面优化羊骨粉水解工艺时,以水解度为指标,得出最优水解条件,即料水比为3∶25(W/V)、水解温度为55℃、水解时间为315 min、加酶量为3.48%(E/S)、p H为7.5,在此条件下水解度为20.38%,与预测值(20.72%)相比,相对误差较小,响应面法所得的优化工艺参数准确可靠,具有实用价值。 相似文献
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通过单因素试验和正交试验,研究了风味蛋白酶对菜籽蛋白中2S(RP-2S)和12S(RP-12S)的水解条件。结果表明,水解RP-2S的最佳酶解条件为底物浓度1%,酶与底物浓度比(E/S)95LAPU/g,酶解温度50℃,pH 7.0,酶解时间3 h,此条件下RP-2S的水解度达33.64%;水解RP-12S的最佳酶解条件为底物浓度1%,酶与底物浓度比(E/S)85 LAPU/g,酶解温度50℃,pH 6.6,酶解时间3 h,此条件下RP-12S的水解度达19.97%。 相似文献
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不同分子质量段小麦面筋蛋白酶解液对美拉德反应物风味的影响 总被引:1,自引:0,他引:1
用超滤法将小麦面筋蛋白酶解液根据分子质量大小分为大于10 ku(M1),5~10 ku(M2),3~5 ku(M3),1~3 ku(M4),小于1 ku(M5)5个组分,研究这5个组分对美拉德反应产物风味的影响。结果表明,美拉德反应产物的主要风味物质是醛类,并且高分子量段美拉德反应产物中高级醛种类较多,而游离氨基酸和小分子寡肽参与美拉德反应主要生成吡嗪类风味物质。分子质量段为3~5 ku(M3)的膜分离组分,其美拉德反应产物鲜味氨基酸含量较高,苦味氨基酸含量较低,鲜味突出,醇厚味明显。 相似文献
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动物蛋白酶解研究(Ⅰ) 总被引:17,自引:3,他引:14
本文主要目的是以美拉德(Maillard)反应产物(MRPs)的风味为判断依据,以水解度(DH)为动物蛋白酶解液-Maillard反应底物之一的特征性指标,根据MRPs的风味确定动物蛋白水解液的最佳DH或DH范围。 相似文献
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以小黄鱼下脚料为原料,利用酶解技术获得小黄鱼下脚料风味前体物质,通过单因素及响应面分析,确定碱性蛋白酶(Alcalase)和风味蛋白酶(Flavourzyme)同步酶解工艺,研究料水比、酶解时间、酶用量、初始pH 值和酶解温度对酶解液水解度和感官品质的影响。结果表明,优化的酶解工艺条件为料水比1:7(g/mL)、酶解温度55℃、酶解时间6.5h、初始pH8.0、Alcalase 用量2.5%、Flavourzyme 用量3.0%。在此酶解条件下的水解度为40.11%,所得酶解液中氨基酸含量86.383g/100g,其中必需氨基酸32.785g/100g,鲜味和甘味氨基酸38.384g/100g,与酶解前相比氨基酸含量明显增加,氨基酸总量增加了67.56%,其中必需氨基酸增加了82.02%,呈味氨基酸增加了79.52%,产品具有浓郁的小黄鱼鱼香味。 相似文献
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肉类香精泛指具有肉类风味的一类食品添加剂,可广泛应用于肉类加工食品和方便食品,肉类香精通常被分为天然肉类香精与合成肉类香精两大类。以肉类蛋白酶解物、还原糖和半胱氨酸等物质为原料,辅以脂质等多种肉香风味的前体物质,通过热反应得到的合成肉味香精。本设计以鸡骨泥为原料,采用复合酶水解制备动物水解蛋白(HAP),再以HAP为基料,通过美拉德反应制备鸡肉香精,探究鸡肉香精的生产工艺。 相似文献
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J.S. Chen S.Y. Wang Z.Y. Deng X.Y. Zhang S.L. Feng H.Q. Yuan J.C Tian 《Journal of food science》2012,77(5):C546-C550
Abstract: As one of the most effective methods to modify proteins, enzymatic hydrolysis is used widely in the preparation of wheat products in the food industry. During the same process, starch pasting occurs frequently. The effects of wheat protein hydrolysis with papain, pepsin, and trypsin on the pasting properties of 3 different kinds of flour were investigated in 5 concentrations. Results showed that the peak viscosity, trough, final, and integral area of pasting curve of these flours decreased with increasing enzymatic hydrolysis of protein, and decreased significantly with the increasing enzyme concentrations. Medium‐gluten flour was the least sensitive to enzymatic activity and weak‐gluten the most sensitive. Downtrends appeared with increasing papain and trypsin concentrations in the form of breakdown. Enzymes had no significant different effect on the peak times of strong‐ and medium‐gluten flour, but prolonged peak time slightly in weak‐gluten flour. The pasting time and temperature of strong‐ and medium‐gluten flour were significantly increased in a concentration‐dependent manner. However, there were no significant effects on the pasting times of weak‐gluten flour. These results could supply a basis for utilization of enzymatic hydrolysis of wheat protein in food industry and for further studies into the interactions between hydrolyzed protein and starch in food or processing industries. Practical Application: Illuminating the effects of enzymatic hydrolysis of protein on the pasting properties of different types of wheat flour is very important in food industry. Flour viscosity decreases after enzymatic hydrolysis of protein/gluten. Enzymes have different effects on peak time, pasting time, and pasting temperatures for different types of flour. These results could supply a basis for utilization of enzymatic hydrolysis of wheat protein in food industry and for further studies into the interactions between hydrolyzed protein and starch in food or processing industries. 相似文献
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胰酶水解猪血蛋白工艺条件的优化 总被引:1,自引:0,他引:1
为拓展猪血蛋白利用途径,提高猪血蛋白的水解率,得到更丰富的Maillard反应底物——小分子肽及氨基酸,采用木瓜蛋白酶、碱性蛋白酶、中性蛋白酶、菠萝蛋白酶、胰酶、风味蛋白酶、复合蛋白酶7种酶,在固定条件下分别对猪血进行水解,以水解度为指标筛选出水解度最高的酶,然后再对该酶进行从单因素试验到正交试验的水解工艺参数优化。结果显示:胰酶的水解效果最好,其最佳的水解条件是酶加量0.5%、水解时间5h、温度55℃、初始pH8.5、底物蛋白质量分数7%,通过一次水解,可使水解度达到38.72%。 相似文献