共查询到19条相似文献,搜索用时 234 毫秒
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本文对不同理化处理对果脯渗糖的影响进行探讨研究。结果表明烫漂和5%盐水抽空处理有显著促渗糖作用。5%盐水和冷冻处理也有明显促渗糖作用,而以5%盐水抽空处理在渗糖和保持成品良好感观性状效果最佳,并初步对充填剂的使用进行研究。 相似文献
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《食品科技》2017,(8)
目的:优化椰子角预处理方式、微波渗糖工艺和覆膜工艺,并研究优化工艺对椰子角品质和渗糖效果的影响。方法:通过正交实验优化渗糖促进液的配比和单因素实验确定最佳预处理方式、微波渗糖工艺和覆膜工艺。结果:经-18℃冷冻预处理10 h和配比为2.0%CaCl_2+1.0%MgCl_2+0.8%甘油的渗糖促进液浸泡后,在微波功率为350 W和料液比为2:10条件下微波渗糖24 min后,经糖液浸渍8 h而制得的椰子角,其含糖量比市面上销售椰子角高10.41%;使用1%CMC溶液覆膜处理的椰子角具有较优的感官品质。结论:优化了的预处理方式、微波渗糖工艺和覆膜工艺可较好提高椰子角的感官品质和含糖量。 相似文献
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采用单因素和L9(34)正交试验研究预处理方式、切片厚度和渗糖时间等因素对低糖苹果果脯微波渗糖效果的影响,通过测定微波渗糖过程中的含糖量变化以及产品感官品质来确定最佳微波渗糖工艺。结果表明:果片经预冻处理,微波渗糖效果最佳;使用30% 微波火力(240W)渗糖40min,果脯既可以保持较高的含糖量,并且产品晶莹透明、口感纯正;控制苹果切片厚度为6mm,微波渗糖效果最好。综合方差分析表明,使用质量分数2%的盐水浸泡切片厚度6mm 的苹果果片2h,在30% 微波火力下渗糖40min,渗糖效果最好。 相似文献
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以生姜为原料,选择微波间断式加热方法制作姜脯。通过单因素试验和正交试验探讨预处理方式、切片厚度、微波加热间隔时间、加热次数、料液比在不同的水平下对姜脯渗糖效果的影响,最终确定最佳的渗糖工艺。试验表明,对姜脯渗糖效果的影响:姜片厚度>微波加热间隔时间>料液比。姜脯渗糖的最佳工艺为:采用-18℃冷冻预处理方式,切片厚度为4 mm,料液比(g/g)为4.5:20,180 W微波火力每加热5 min暂停7min,重复7次,生产的姜脯色泽黄亮、晶莹剔透,脯体饱满,口感纯正,含糖量达68.87%。 相似文献
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以紫薯为试材研究微波渗糖过程中微波功率、微波处理时间、真空度、液料比和明胶添加量对低糖紫薯果脯渗糖效果的影响。以果脯中还原糖含量为指标,采用响应面法对微波真空渗糖工艺进行优化。结果表明:经冷冻预处理紫薯,以液料比71(g/g)在混合糖液(糖液组成为质量分数20%麦芽糖与20%蔗糖,以355的质量比混合,明胶质量分数1%)中进行微波渗糖,微波功率560 W、渗糖时间7 min和真空度0.05 MPa。在该条件下制得的紫薯果脯中还原糖含量达3.60 mg/g,花色苷保留率达93%,品质较好。 相似文献
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为探明真空处理对椰角生产工艺中椰肉渗糖的影响。考察抽空时间、抽空次数、充气时间、破除真空后的浸糖时间、渗糖时的加糖方式及糖液温度对椰肉渗糖率的影响。结果表明:椰肉真空渗糖过程中,渗糖率随抽空时间的增加而有所增加,但抽空时间超过15min 后渗糖率变化很小;增加抽真空次数,对渗糖并无显著作用;破除真空时,90min 内延长充气时间,可以提高渗糖率;真空处理后的浸渍渗糖主要发生在前6h。椰肉抽空完成后再吸入糖液的加糖方式有利于渗糖;糖液温度越高,对渗糖促进越明显,但温度不宜超过90℃。 相似文献
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预处理方法及微波渗糖对板栗果脯加工过程品质变化研究 总被引:1,自引:0,他引:1
以板栗为实验材料,通过不同预处理的比较和跟踪测定其组织内糖含量的变化,检测微波对板栗果脯渗糖的影响。结果表明,微波在短时间内快速地提高板栗果脯的渗糖速率,而且能明显减少传统煮糖带来的褐变现象。通过对微波功率、处理时间、栗仁厚度3个因素的分析,确定了板栗果脯微波渗糖的最佳工艺条件。 相似文献
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The effects of addition of sucrose, lecithin, and cellulose on unsteady state diffusivity and steady state permeability of moisture through fractionated palm kernel oil (PKO)-based films were studied under liquid-induced moisture migration at a water activity gradient of 1.0 and at a temperature of 25 °C. Addition of sucrose, cellulose, and lecithin into the fat films decreased the diffusivity of moisture, but increased the permeability of moisture due to the high moisture sorption capacity of these hydrophilic components.The effect of sucrose concentration and the presence of sugar ester in the aqueous phase on the diffusivity and permeability of moisture through the fat-based film were also studied. For pure PKO films, sucrose concentration of the aqueous phase and presence of sugar ester in the aqueous phase had no effect on the diffusivity and permeability. For fat-based films containing sucrose, with increasing sucrose concentration of the aqueous phase, the diffusivity increased but the permeability decreased. Presence of sugar ester at 0.3% in the aqueous phase significantly increased permeability of the fat-based films containing sucrose.The mass transfer coefficient for sucrose leaching from the fat based films into the aqueous phase increased with sucrose content in the film. The rate of sucrose leaching out from the fat film into 0.3% sugar ester solution was higher than that into pure water. The diffusivity of sucrose in the fat film leaching out into the aqueous phase increased with sucrose content in the fat films. 相似文献
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This paper describes the effect of serum release on sweetness intensity in mixed whey protein isolate/gellan gum gels. The impact of gellan gum and sugar concentration on microstructure, permeability, serum release and large deformation properties of the gels was determined. With increasing gellan gum concentration the size of the pores present in the protein network, the permeability and the serum release increased, as well as the Young's modulus, the fracture stress and the fracture strain. Increasing the sugar concentration induced an increase of the pore size, but resulted in a decrease of permeability and serum release. The addition of sugar resulted in gels with a higher Young's modulus and a lower fracture strain. This effect was more evident at higher gellan gum concentrations. By changing the protein concentration of the gels, a set of samples was prepared exhibiting constant large deformation properties but varying in serum release and sugar concentration. Serum release significantly boosted sweetness intensity. For example, the sweetness scores for gels with 12% serum release were the same as for gels with 2% serum release but 30% higher sugar concentration. The results indicate that serum release is a tool to compensate for the loss taste intensity related to the reduction of sugar and salt in gelled foods. 相似文献
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采用超声渗糖制备野生软枣猕猴桃果脯并进行质构分析,探讨超声波对渗糖效果的影响。以含糖量为考察指标,通过响应面法分析优化超声渗糖条件为超声渗糖时间5.1 h、超声功率140 W、渗糖液糖度54 °Brix,此条件渗糖后的果脯湿基含糖量为32.27%,提高了果脯的渗糖速率。全质构分析和穿刺测试结果表明,采用超声渗糖法制备的软枣猕猴桃果脯的硬度值为4 345 g,咀嚼性为52.73 mJ,凝聚性为0.22 mJ,黏性值为58 g,脆性值为435.5 g,其主要质构指标与对比蜜枣果脯接近,感官质量优于真空渗糖软枣猕猴桃果脯。 相似文献