共查询到16条相似文献,搜索用时 63 毫秒
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本文研究了白云凤爪膨润工艺中各参数对其膨胀率的影响,并采用质构分析仪对凤爪产品的弹性进行分析,利用扫描电子显微镜观察凤爪产品在不同膨胀率下结构的变化.研究结果表明:白云凤爪膨润工艺的最佳条件为浸泡温度为30℃,醋酸浓度2.0%,浸泡时间5 h,此时白云凤爪的膨胀率可达78.23%. 相似文献
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在单因素实验的基础上运用响应面(RSM)分析法对虎皮凤爪的膨润工艺进行优化。研究了浸泡温度、浸泡时间、NaOH溶液浓度对凤爪膨润效果的影响。结果表明,膨润的最佳工艺条件为:浸泡温度为39.89℃,浸泡时间为4.19h,NaOH溶液浓度为0.30%,此时虎皮凤爪的膨胀率为71.84%,与响应面模型的预测的膨胀率(72.16%)相吻合。 相似文献
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凤爪是人们所喜爱食品,凤爪肉不多,而皮富含胶原蛋白,可减少皱纹,有美容作用,尤其受到女性欢迎。根据加工方式,凤爪类小吃可分为白云凤爪和炸凤爪两种。鸭掌的加工方式跟凤爪相似。本文介绍炸凤爪、炸鸭掌的加工工艺。 相似文献
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以新鲜凤爪为主要原料,采用酸法提取胶原蛋白,通过质构分析,对影响凤爪胶原蛋白凝胶强度的因素进行研究,结果表明,凤爪胶原蛋白凝胶强度随着胶原蛋白液浓度的增大而逐渐增大;随着温度、pH、NaCl和CaCl2浓度的增大,凝胶强度呈先增大后减小的趋势;不同的磷酸盐对凤爪胶原蛋白凝胶强度的影响不同。 相似文献
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为探究不同条件下次氯酸钠消毒处理后对产生氨基脲残留的影响,以鸡爪为研究对象,考察次氯酸钠浓度、温度、浸泡时间、pH值等因素的影响。样品经次氯酸钠溶液处理后,在酸性条件下采用2-硝基苯甲醛进行衍生,调节pH值至中性后用乙酸乙酯提取,液相色谱-串联质谱仪进行测定,同位素内标法定量。结果表明,有效氯质量浓度、温度及浸泡时间与氨基脲产生量呈明显的正相关性;在pH 9~12范围内,鸡爪中氨基脲产生量随着浸泡溶液pH值的升高而增大。消毒处理过的样品经水漂洗后氨基脲含量减少50%~60%。 相似文献
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以超声波辅助碱性蛋白酶提取所得鸡爪胶原蛋白肽作为实验材料,首先研究鸡爪胶原蛋白肽的理化特性(外观色泽、等电点、分子质量分布、十二烷基硫酸钠-聚丙烯酰胺凝胶电泳、氨基酸组成及水解度),进一步对其起泡性和起泡稳定性、乳化性和乳化稳定性等功能特性进行研究。结果表明:鸡爪胶原蛋白肽的分子质量分布范围小于α2-链,小分子质量肽段比例较高;氨基酸种类丰富,甘氨酸和脯氨酸在总氨基酸含量中占比最高;优化提取的鸡爪胶原蛋白肽水解度约28.65%,起泡性和起泡稳定性高达133.33%和126.67%,且具有较好的乳化性和乳化稳定性。 相似文献
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Lameness of dairy cows is a major welfare and economic problem. Degree of hardness of claws may influence chances for injury or for claw lesions, and exposure of claws to moisture may make them soft. To assess the relationship among hardness of the claw horn, quantity and rate of absorption of water, and incidence of claw lesions, 4 experiments were carried out. In the first 3 experiments, we soaked pieces of the claw horn in water for 12 to 24 h. Soaked claws gained weight and became significantly softer, indicating that water was absorbed. One-third of the total water absorbed in 24 h occurred during the first hour. Base of the abaxial and dorsal walls of the claw was harder than the sole, but became softer more rapidly when soaked in water. In the 4th experiment, significant negative correlations were detected between claw hardness of cows and severity of claw lesions, suggesting that cows with softer claws have the most severe claw lesions. Claw horn tissue absorbs water rapidly and claw hardness decreases with moisture content, suggesting that brief exposures to moist surfaces result in claws that absorb water and consequently become softer. The relationship between hardness and claw lesions indicates that cows with softer claws are at greater risk for lameness. 相似文献