共查询到20条相似文献,搜索用时 93 毫秒
1.
2.
低温肉制品复合护色剂的研制 总被引:5,自引:0,他引:5
肉类加工过程中的发色、护色、褪色及变色问题都是影响肉制品外观品质的重要因素。肉制品生产中通常添加一定量天然红色素以赋予产品鲜艳的红色、刺激消费者的购买欲、提高产品的竞争力。但此类制品尤其是低温肉制品,在储存和销售过程中易因光照和氧化作用而褪色,一般在冷柜销售一周后便会褪变成灰白色,严重影响产品的外观,进而影响销售。本文通过对低温肉制品褪色机理的研究,对茶多酚、异VC钠、植酸、柠檬酸等几种单一护色剂及其搭配组合对肉制品的护色效果进行研究,通过正交实验得到一组最佳护色剂:茶多酚0.03%、异VC钠0.04%、柠檬酸0.10%、植酸0.01%。添加到肉制品中能使低温肉制品存储24d后仍有一定的红色,明显延长了低温肉制品的货架期。 相似文献
3.
4.
5.
天然保鲜剂越来越受到人们的关注。苹果多酚作为一种天然植物多酚,由于其具有降低肉制品中脂质氧化,抑制肉制品中有害微生物的生长作用,正在成为肉品保鲜中的抗氧化剂、抑菌剂和护色剂。文中主要介绍苹果多酚的组成以及在肉品保鲜的作用和应用。 相似文献
6.
7.
8.
9.
10.
为研究不同护色剂对杏酒褐变的抑制作用,以褐变抑制率和色差值为指标,选用六种护色剂进行单因素实验和正交试验,选出对褐变抑制影响最大的三种护色剂后,利用响应面试验进行优化。结果表明,杏酒的最佳护色剂配方为异抗坏血酸钠0.70 g/L、L-半胱氨酸1.10 g/L和植酸0.01 %,在此条件下测得的杏酒酒精度、还原糖和总酸与未添加护色剂的杏酒对照组无明显差异,褐变抑制率为53.11%,色差值为22.35,与预测值的吻合率分别达到97.00%和95.84%,可有效抑制杏酒褐变的发生。 相似文献
11.
12.
13.
为提高油橄榄果出油率、改善初榨橄榄油(VOO)品质,以甘肃陇南主栽的成熟度为7的莱星品种油橄榄鲜果为原料,考察压榨过程中新鲜橄榄叶(0、3%、5%)和复合果胶酶(0、0.01%、0.02%)添加量(以油橄榄果质量计)对油橄榄果出油率和VOO色泽、叶绿素含量、基本理化性质、总酚含量、脂肪酸组成及含量的影响。结果表明:添加适量的新鲜橄榄叶可提高出油率及总酚含量,降低酸值,但色泽加深,叶绿素含量和过氧化值升高;添加适量的复合果胶酶在提高出油率的同时,VOO的总酚含量上升,叶绿素含量和过氧化值降低,但酸值升高,色泽加深;压榨过程中添加新鲜橄榄叶和复合果胶酶对VOO脂肪酸组成没有影响,但对油酸、亚油酸、棕榈酸和棕榈烯酸等主要脂肪酸含量有一定影响。在压榨制取VOO时添加适量的新鲜橄榄叶与复合果胶酶可提高出油率,获得富含多酚的VOO。 相似文献
14.
Effects of the type and amount of fatty acid (0-2.0 mmol/g-starch of lauric, myristic, palmitic, stearic, oleic, and linoleic acids) on the complex formation, thermal properties, and in-vitro digestibility of gelatinized potato starch-fatty acid mixtures were investigated. Complex index (CI) evaluated by the reduction in the iodine binding capacity of starch increased with an increase in the amount of fatty acids, and reached a plateau depending on the type of fatty acid. The maximum CI value was higher in the order of lauric (49.9%), linoleic (47.6%), myristic (42.4%), oleic (36.7%), stearic (35.3%), and palmitic acid (30.9%). From the calorimetric study, it was demonstrated that melting temperature of the complexes was higher in the order of stearic (96.7 °C) > lauric, myristic, palmitic, and oleic (89.6-92.1 °C) > linoleic acid (78.3 °C). Melting enthalpy for complexes was roughly related to the CI value (R2 = 0.667). From the in-vitro digestibility measurement, it was found that a certain amount of fatty acid reduced the starch content hydrolyzed at a given condition. Among them, 0.50 mmol/g-starch lauric and oleic acid samples showed the largest reduction in the hydrolyzed starch content. This result was related to the extent of complex formation characterized by CI value and its helical order characterized by melting temperature. In addition, there was a possibility of the complex formation between amylose and unsaturated fatty acid during the hydrolysis of gelatinized starch. 相似文献
15.
研究了银耳枸杞保健饮料生产时的工艺参数。结果表明,产品的最佳配方为:银耳8%(湿基)、枸杞2%(湿基)、复合稳定剂0.15%、糖12%和酸0.1%。 相似文献
16.
本文采用平板菌落记数法,研究了甘氨酸、富马酸、山梨酸和葡萄糖酸内酯及其复合物对白鲢鱼腌制过程中微生物的抑制效果,测出其半抑菌浓度(IC_(50))分别为:甘氨酸IC_(50)=0.172%、富马酸IC_(50)=0.431%、山梨酸IC_(50)=0.145%和葡萄糖酸内酯IC_(50)=0.205%;甘氨酸、山梨酸、富马酸和葡萄糖酸内酯复合使用能产生十分显著的抗菌协同作用,复合物的IC_(50)只相当于四者IC_(50)总量的35.0%,能大幅度地降低四者单独使用时的IC_(50),并且复合物还具有提高风味、改善质构、增强弹性和抗油脂氧化等多种功能。 相似文献
17.
为改善蛋黄(egg yolk,EY)在酸性乳液体系的物理稳定性,采用EY蛋白与植酸(phytic acid,PA)形成静电复合物稳定EY乳液。研究酸性条件下PA质量分数(0%~0.8%)对EY蛋白及EY乳液物理稳定性的影响。结果表明,pH 3.0时,EY与0.012 5%~0.8% PA形成不溶性的静电复合物EY-PA;最优质量分数(0.2%)PA与含1%蛋白的EY形成复合物制备乳液较对照组的乳液黏度升高,粒径及乳析指数显著降低(P<0.05),界面蛋白质吸附量显著提高(P<0.05),乳滴分布更均匀,乳液的抗聚结效果提高。因此,EY蛋白与PA形成的静电复合物可调控EY乳液的理化特性,提高EY在酸性乳液体系的物理稳定性。 相似文献
18.
Rheological properties of a soluble self-assembled complex from starch, protein and free fatty acids
Controlled interaction among amylose, protein and free fatty acids was performed using a pasting cell installed in a rheometer resulting in the formation of a soluble high molecular weight complex. Rheological characterization of solutions of the formed complex as well as during its formation in a range of temperatures of 25-95 °C and shear conditions ranging from 2.5 to 16.7 rad/s were performed. Different fatty acids (oleic acid, linoleic, palmitic, and conjugated linoleic acids), corn starch and whey protein, in a range of protein concentrations from 3.75% to 10% were used to produce the complex. By using rheological techniques and size exclusion chromatography was found that concentration of protein, type of free fatty acid, temperature, time and shear rates, all, had a significant effect on the formation of the complex and its rheological properties. Rheological results proved that the formation of the complex starts at 75 °C but its structure set during cooling at 55 °C. Increases in the shear rates applied during the complex formation significantly reduced its viscosity. Increases in the amount of protein increased the order of the complex. Conjugated linoleic acid, a bioactive compound, was able to be incorporated in the complex but using a slower heating rate than that used for the other fatty acids. 相似文献
19.
以鲜辣椒为试材,用浓度0.4%、0.6%、0.8%的植酸溶液浸泡30s,取出晾干,室温下袋装贮藏,研究植酸对辣椒的保鲜效果。结果表明,经过植酸涂膜处理,能降低辣椒的失重率、红果率、腐烂率,减缓辣椒VC和可溶性固形物的损失,具有良好地保鲜效果。其中浓度为0.6%的植酸溶液涂膜处理辣椒保鲜效果较好,室温下贮藏可延长辣椒的货架期。 相似文献
20.
乳化剂对冷冻面团流变学性质的影响研究 总被引:3,自引:0,他引:3
面团的流变学性能直接影响面团的加工品质和最终产品的质量,乳化剂能显著改善面团的流变学性能。本实验通过加入不同种类和不同添加量的乳化剂来改善面团的流变学性能,并利用质构仪测量低温储存和添加剂对面团流变学性能的影响情况,结果表明:低温储存会使面团的流变学性能降低;不同添加量的DATEM、SSL、卵磷脂、单甘酯和SP60都能改善面团的流变学性能,其中0.15%的DATEM、0.2%的SSL、0.8%的卵磷脂、0.15%的SP60和0.5%的单甘酯等对面团的流变学性能的改善较明显,其改善程度的大小关系为:0.15%DATEM>0.2%SSL>0.8%卵磷脂>0.15%SP60>0.5%单甘酯。研究结果为面制品生产中正确选择适当的乳化剂及适当的添加量提供了基础数据。 相似文献