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针对酱卤牛蹄的加工工艺过程及相关的技术参数的选择进行了研究,酱卤牛蹄的主要生产工艺过程包括原料选择、预处理、腌制、卤制、包装、杀菌等.通过实验得出适宜的腌制条件是干腌12h,腌制温度8℃,食盐浓度6%.最佳的卤制工艺是:食盐浓度5%,白砂糖浓度7%,卤制时间1h,用红曲色素着色.杀菌条件是:121℃杀菌10min. 相似文献
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为探究腌制时间对大黄鱼鱼肉理化性质和烤制品品质的影响,将大黄鱼鱼肉置于由1%谷氨酰胺转氨酶、10%食盐和15%山梨糖醇组成的溶液中腌制,测定鱼肉的保水效果、质构、热稳定性和蛋白组织结构,评价烤制鱼肉的品质。结果表明,当腌制时间从2 h增至8 h时,鱼肉硬度从948.76 g降至352.67 g,蒸煮损失率从11.20%增至18.52%。随着腌制时间的延长,鱼肉硬度增加而蒸煮损失率降低。扫描电镜显示,腌制2~8 h的鱼肉呈现疏松的纤维结构,延长腌制时间会增加鱼肉结构的致密性。经过烤制,腌制2~24 h的鱼肉纤维结构间隙较大,硬度无显著变化,而腌制48 h的鱼肉微观结构致密,硬度显著增加。伴随腌制时间的延长,鱼肉烤制后的咸味、鲜味、涩味和丰富性逐渐增加,苦味逐渐降低;氮氧化合物、甲基类、硫化物、有机硫化物、醇和醛酮类相关的挥发性气味显著增加。结论:改变腌制时间可以调控大黄鱼鱼肉的理化性质和烤制品质,这为利用大黄鱼研发预制菜肴提供了理论参考。 相似文献
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为提高腊肉品质,在腌制过程中分别添加0.6%、1.2%和2.4%的香料提取物(包括花椒、八角、香叶、茴香、肉桂和丁香)。熏制时,将提取后的香辛料残渣按相应的比例加入到熏烟材料中。成品真空包装后,分别在冷藏1 d和120 d后测定样品的理化指标、脂肪和蛋白质氧化、亚硝酸盐残留量、色泽、质构、微生物含量和感官品质等。结果表明,添加0.6%的香料对腊肉品质影响不大。当香料添加量增加到1.2%和2.4%时,能显著抑制脂肪氧化和微生物生长,更好地保持腊肉在冷藏过程中的质地和弹性。然而,2.4%的香料添加量对腊肉颜色、感官质量和蛋白质氧化有轻微的负面影响。因此,在腊肉加工过程中,加入适当香辛料能改善腊肉品质,而加入1.2%的香料对提高腊肉品质的效果最好。 相似文献
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本文研究了以红薯、麸皮为原料、前稀后固法酿造食醋的工艺。结果表明前稀后固法工艺明显优于传统固态发酵工艺,成熟醋醅酸度及混合原料出醋率平均达到4.75g/100ml和3.34kg/kg,分别提高31.2%和30.0%,而且酿造食醋周期缩短了6d。 相似文献
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Distinctly different rates and pathways were observed for abiotic transformation of gamma-hexachlorocyclohexane (gamma-HCH) between homogeneous systems and systems containing FeS solid. The observed half-lives of gamma-HCH decrease from about 1136 and 126 d in homogeneous systems to about 55 and 50 d in heterogeneous systems at pH approximately 6.9 and pH approximately 8.3, respectively. While no appreciable difference in the measured rate was found between the two tested heterogeneous systems of pH 6.9 and pH 8.3, the observed hydrolysis rate constant for the homogeneous systems is highly pH dependent, being constant at approximately 0.0005 d(-1) in pH 2.26-6.73, and increased by an order of magnitude per pH unit from pH 6.73 to pH 12.02. A dehydrohalogenation pathway from gamma-HCH to pentachlorocyclohexene followed by parallel reactions to three trichlorobenzenes is proposed for the hydrolysis reaction in the homogeneous systems. For the heterogeneous systems, the reactions likely follow both the hydrolysis pathway and pathways from gamma-HCH to tetrachlorocyclohexene (TeCCH) and to dichlorocyclohexadiene (DCCD) via dichloroelimination followed by dehydrohalogenation from TeCCH to dichlorobenzenes or from DCCD to chlorobenzene. This study suggests that environmental modeling using hydrolysis rate data measured in homogeneous systems may bear significant inaccuracy for the predicted fate and transport of HCH isomers in highly heterogeneous ecosystems at the regional or mega scales. 相似文献
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数码喷绘耗材涂布生产线是我国目前生产制造的一种新型涂布机,主要用于高光相纸、亚光相纸、PET聚脂片基、灯箱布、无纺布、油画布、丝光绢布等的涂布,具有广阔的发展前景.作者根据自己的设计经验,介绍了THZ1600型喷绘耗材涂布机的功用、主要涂布工艺、工作原理与结构设计技术. 相似文献
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Sensitivity of Listeria monocytogenes strain Scott A and Brie-1 to several factors in raw egg albumen was investigated. A concentration of ca 15% of albumen in trypticase soy broth was listeristatic after 24 hr at 35°C, and listericidal effects were observed at higher concentrations. Supplementation of albumen with iron or biotin did not reverse the inhibition. Preheating of albumen (50–80°C) caused progressive loss of antilisterial effects. Supplementation of broth with lysozyme (>1 mg/mL) produced antilisterial effects that were enhanced at pH 9; conalbumin (>6 mg/mL) suppressed cell growth, while ovomucoid (>2 mg/mL) was inhibitory only at pH 9. Results inferred that antilisterial effects of albumen were caused primarily by lysozyme and were enhanced by ovomucoid, conalbumin, and alkaline pH. 相似文献