共查询到18条相似文献,搜索用时 250 毫秒
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以玉米醇溶蛋白、纳他霉素、丁香酚、甘油、乙醇为原料,采用流延法制备成负载丁香酚/纳他霉素的玉米醇溶蛋白膜,通过单因素实验对成膜工艺进行优化。并将负载丁香酚/纳他霉素的玉米醇溶蛋白膜涂膜于柑橘表面进行保鲜。结果表明:当玉米醇溶蛋白和80%乙醇固液比1∶10(g/mL),纳他霉素含量0.05%,丁香酚含量10ug/0.05%纳他霉素,甘油浓度为玉米醇溶蛋白的20%时,膜的拉伸强度7.6MPa,红外光谱图和差热分析图表明添加物没有改变玉米醇溶蛋白的主要结构且具有良好的相容性。柑橘表面涂膜保鲜实验结果表明,负载丁香酚/纳他霉素的玉米醇溶蛋白膜涂膜处理保鲜显著。 相似文献
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《食品科技》2020,(5)
以酪蛋白酸钠为稳定剂,采用反溶剂法制备桉叶多酚-玉米醇溶蛋白/酪蛋白酸钠纳米微胶囊。首先对制备过程中的玉米醇溶蛋白、桉叶多酚及酪蛋白酸钠浓度进行了优化研究,确定最优的工艺参数,然后对最佳配方条件下桉叶多酚-玉米醇溶蛋白/酪蛋白酸钠纳米微胶囊产品的稳定性、微观结构与生物利用度进行了评价。研究表明,桉叶多酚纳米微胶囊的最佳制备配方为:玉米醇溶蛋白浓度10 mg/mL、桉叶多酚浓度1 mg/mL和酪蛋白酸钠2 mg/mL,在此条件下,制备得到了粒径160 nm、包埋率62.89%的纳米微胶囊。该桉叶多酚纳米微胶囊在80 ℃加热3 h及0~100 mmol/L NaCl条件下粒径仍保持在160 nm左右,且PDI值均小于0.2,显示出较好的稳定性,同时能有效改善玉米醇溶蛋白等电点条件下的聚集沉淀情况。扫描电镜结果显示桉叶多酚纳米微胶囊粒径为100~200 nm,与分散液中粒径基本一致,且表面均一,呈球形。最后通过模拟体外消化实验发现,经包埋后的桉叶多酚纳米微胶囊与游离桉叶多酚相比,其溶解度在模拟胃液与肠液消化阶段分别提高了41.7%与49.1%,显著提高了其生物利用度。因此,在最佳工艺配方条件下制备的桉叶多酚微胶囊具有良好的品质,为桉叶多酚纳米微胶囊的应用提供了理论基础。 相似文献
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玉米醇溶蛋白阻湿性及抗氧化性应用的研究 总被引:3,自引:0,他引:3
对玉米醇溶蛋白在食品保鲜中的应用进行了研究。实验证明玉米醇溶蛋白具有良好的保湿性抗氧化性。采用玉米醇溶蛋白液作硬糖,可以延缓硬糖吸水溶化,防止硬糖发烊、返砂,以便长久地保持硬糖的质量,在玉米醇溶蛋白溶液中添加增塑剂能更有效地增强其保湿性。用玉米醇溶蛋白浸涂杏仁及核桃仁能延缓其氧化酸败速度,而添加增塑剂能使膜更好地粘着于食品表面,从而增强了膜的阻氧性。杏仁及核桃仁的最佳涂膜液配比为:在10ml10%玉米醇溶蛋白中加入0.8ml甘油、0.5ml虫胶. 相似文献
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利用茶多酚、川陈皮素和羧甲基纤维素钠(Sodium carboxymethyl cellulose,CMC-Na)进行复合涂膜的制备,以刺嫩芽为保鲜对象,以感官评价、失重率、硬度、叶绿素、VC含量、多酚氧化酶活性和丙二醛含量为指标,多方面评定复合涂膜对刺嫩芽的保鲜效果,并分析了可能的保鲜机理。结果表明:复合涂膜组对刺嫩芽的保鲜效果明显优于对照组,同时也明显优于茶多酚涂膜组和川陈皮素涂膜组。复合涂膜剂可有效地抑制刺嫩芽菜体褐变,维持多酚氧化酶和丙二醛处于较低水平,保持菜体组织形态,保证较高的感官品质,延缓其VC含量和水分的损失。贮藏12 d时,与对照组相比,复合涂膜处理的刺嫩芽VC含量提高1.4倍,失重率减少31%,综合各保鲜指标分析,复合涂膜可以延长刺嫩芽4~5 d的贮藏时间。 相似文献
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功能性可食用膜在生鲜肉和肉制品保鲜中的应用研究进展 总被引:4,自引:0,他引:4
近年来,无论是在包装领域还是食品保鲜领域,可食用膜都受到了国内外学者的极大关注。随着对其研究的深入,更多形式的可食用膜用于生鲜肉和肉制品保鲜。目前研究的热点主要集中于功能性可食用膜,但对于这种可食用膜的研究主要集中于果蔬制品上,其在生鲜肉和肉制品上的应用研究比较零散。本文对应用于生鲜肉和肉制品保鲜的功能性可食用膜进行较为系统的归类,对其改善生鲜肉和肉制品的品质和货架期的研究进行综述,对可食用膜与其他保鲜技术联合使用在肉制品保鲜中应用的发展进行介绍与分析。 相似文献
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Bing-Jie Chen Ying-Jun Zhou Xiao-Yi Wei Hu-Jun Xie Robert C. Hider Tao Zhou 《Food and Bioprocess Technology》2016,9(6):1031-1039
To explore a novel efficient method in food preservation, edible zein coating which incorporates a polymeric chelator was developed and its preservative effect on commercially manufactured fish balls was investigated. The quality indicators of the fish ball during the storage, including sensory quality, total bacterial count, total basic volatile nitrogen (TVB-N) content, thiobarbituric acid reactive substances (TBARS), and pH value were determined. It has been demonstrated that a zein film containing a polymeric chelator significantly (P?<?0.05) improves the sensory properties, retards the growth of spoilage bacteria, and decreases TVB-N and TBARS values. The increase of the microbial load of fish balls coated with antimicrobial zein during a 16-day refrigeration storage period was less than 1 log cfu/g, while the microbial load increased to about 5 log cfu/g for the control group lacking the coating treatment. Although statistically significant differences in the pH values were not observed between coated and uncoated fish balls (P?>?0.05), fish balls coated with antimicrobial zein maintained a relatively stable state during storage. Zein coating which incorporates a polymeric chelator extends fish ball shelf life to 19 days at 4 °C, being more efficient than zein coating lacking a polymeric chelator (13 days). Clearly, polymeric chelator-incorporated zein film could find application in the preservation of surimi products by preventing the growth of bacteria and oxidation of fat during storage. 相似文献
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壳聚糖溶液涂膜是一种新兴的保鲜技术,具有较好的保鲜效果和优越性,但尚存在成膜较慢、不易操作、膜层厚度难控制等缺点,因而改善涂膜液的组成和涂膜技术是涂膜保鲜的关键。本文研究了新的涂膜方式和添加易挥发的乙醇来改进壳聚糖涂膜液的成膜和抑菌效果。通过改变不同乙醇浓度、壳聚糖浓度和涂膜方式等条件,分析其对冷藏过程中草鱼肉的微生物菌落总数和TVB-N值的影响。结果表明,涂膜溶液中含有75%的乙醇时,不仅对冷藏草鱼肉的抑菌效果好,而且还具有减菌作用,使样品初始微生物菌落总数降低超过51%;壳聚糖浓度为1.0%时,涂膜液的成膜效果及对草鱼肉的抑菌效果均较好;此外,涂膜方式对其效果影响不明显,但喷雾涂膜处理相对方便、经济。因此,以含有75%乙醇的壳聚糖酸性涂膜保鲜剂喷雾涂膜是一种成膜和抑菌效果均好的改良型鱼肉保鲜技术。 相似文献
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S.K.V. Bharathi M.M. Leena J.A. Moses C. Anandharamakrishnan 《International Journal of Food Science & Technology》2020,55(4):1477-1484
This study aimed to enhance the antioxidant property of biopolymer film without the incorporation of external agents. The active bilayer film with improved antioxidant activity has been developed by electrospinning zein, a prolamine of corn as nanofibre (average diameter of 286 nm) on solvent cast chitosan film. Zein nanofibres exhibited a slight increase in antioxidant activity as compared to solvent cast zein film. But, zein nanofibre coating on chitosan films significantly improved its antioxidant activity from 12.41% to 44.17%. The developed bilayer films were evaluated for its ability to prevent browning in minimally processed apple slices and compared with those of chitosan and zein films plasticised with polyethylene glycol. Higher surface to volume ratio and better affinity of zein nanofibres in the bilayer film helped enhance its anti-browning ability. Thus, zein nanofibre-coated chitosan bilayer films can be used as an effective anti-browning packaging material for the packing of minimally processed fruits. 相似文献