共查询到19条相似文献,搜索用时 171 毫秒
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干制是最重要的果蔬加工技术之一,选择合适的干制技术与干燥能耗、产品品质密切相关。射频加热技术作为一种新型物理加热技术,因其加热迅速、具有体积加热效应、能量穿透深度大等优点,同时兼具微生物控制和灭酶效果,近年来备受关注。本文主要综述了射频加热技术的作用机理及特点,影响其在果蔬干制加工中应用的因素,归纳总结了射频加热技术在果蔬干制、微生物控制与灭酶中的应用现状,探讨了射频加热均匀性问题及可能的解决方案,并对未来研究方向进行了展望,为其今后在果蔬干制工业化应用提供参考。 相似文献
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果蔬干制技术是一种比较常见的果蔬深加工技术。将果蔬采用不同的加工技术进行干制可提高农民收入,改善农民生活质量,甚至对我国农业经济都有很大的影响。本文介绍了现有的果蔬干制加工技术,例如热风干燥技术、真空冷冻干燥技术和变温压差膨化技术等,并对联合干燥技术进行举例概述,最后探讨了今后果蔬干制技术的发展方向。 相似文献
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近年来,我国果蔬加工业发展迅速,脱水果蔬加工已经成为增加农民收入提高农业效益、促进我国区域经济发展,在国内外市场占据较大优势的重要行业。然而,果蔬的风味物质是评价果蔬品质的重要指标,在干燥加工过程中其风味物质的种类及含量会发生较大的变化,本文重点概述了目前国内外关于热风干燥、真空冷冻干燥、微波干燥和联合干燥以及其它干燥技术对果蔬挥发性风味物质和非挥发性风味物质2个方面的影响以及不同干燥技术引起风味物质变化的原因方面的研究进展,在阐述当前国内外果蔬干燥技术在风味物质上的研究现状的基础上,分析了现状及存在的问题,提出了干燥技术在果蔬风味物质中的应用研究可能发展的方向,为干制果蔬风味品质的研究提供参考。 相似文献
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采用自然干制法、电热恒温干制法、微波干制法干制辣椒,并比较不同干制方法对辣椒中Vc含量的影响。采用自然干制时,随着日晒时间的增多,Vc含量迅速减少,20d时Vc的保留率仅为11.3%;电热恒温干制的样品,80℃、20min处理,Vc的保留率为44.5%;微波干制样品,700W、1min处理,Vc的保留率为41.0%。 相似文献
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目的:研究香椿干制过程中的褐变控制技术.方法:以香椿干制品L*值和感官品质为指标,以未经处理的香椿作对照,研究护色剂种类、浓度、护色温度及时间对干制香椿的护色效果,并与水烫漂作比较.采用常压热空气干燥和真空干燥技术,探讨干燥方法对干制香椿L*值及感官品质的影响.结果:控制香椿褐变的最佳工艺条件是:将香椿浸于1.5 mg/mL EDTA-2Na与1.5 mg/mL Zn(Ac)2混合溶液中,97℃烫漂1 min,在真空度0.09MPa、温度60℃条件下真空干燥4 h,获得的脱水香椿L*值和感官评分均显著高于对照.结论:香椿干制前进行护色处理并结合真空干燥技术,可以有效地控制香椿干制过程中的褐变. 相似文献
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分别对真空微波干燥、冷冻干燥、热风干燥及热风与真空微波联合干燥等不同干燥方式对颗粒状果蔬质量变化的影响进行了讨论,以VC和叶绿素的保持、色泽的差异、收缩和复水性能等为质量参数,分别进行比较。真空微波干燥在以上各质量参数方面,虽比冻干产品有一定差距,但远优于常规热风干燥。采用常规热风与真空微波联合干燥方式也能较好地改善颗粒状果蔬的品质。 相似文献
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Recent developments in high-quality drying of vegetables,fruits, and aquatic products 总被引:2,自引:0,他引:2
Min Zhang Huizhi Chen Arun. S. Mujumdar Juming Tang Song Miao Yuchuan Wang 《Critical reviews in food science and nutrition》2017,57(6):1239-1255
Fresh foods like vegetables, fruits, and aquatic products have high water activity and they are highly heat-sensitive and easily degradable. Dehydration is one of the most common methods used to improve food shelf-life. However, drying methods used for food dehydration must not only be efficient and economic but also yield high-quality products based on flavor, nutrients, color, rehydration, uniformity, appearance, and texture. This paper reviews some new drying technologies developed for dehydration of vegetables, fruits, and aquatic products. These include: infrared drying, microwave drying, radio frequency drying, electrohydrodynamic drying, etc., as well as hybrid drying methods combining two or more different drying techniques. A comprehensive review of recent developments in high-quality drying of vegetables, fruits and aquatic products is presented and recommendations are made for future research. 相似文献
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微波干燥技术在食品工业中的应用研究 总被引:13,自引:0,他引:13
微波干燥技术是一种应用在食品工业的快速脱水新技术。介绍了近年来微波干燥技术在谷类、果蔬和水产品等食品原料中的应用技术研究,分析了现状及存在的问题,提出了微波干燥技术在食品工业中的应用研究可能发展的方向。 相似文献
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Daniel I. Onwude Norhashila Hashim Rimfiel B. Janius Nazmi Mat Nawi Khalina Abdan 《Comprehensive Reviews in Food Science and Food Safety》2016,15(3):599-618
The drying of fruits and vegetables is a complex operation that demands much energy and time. In practice, the drying of fruits and vegetables increases product shelf‐life and reduces the bulk and weight of the product, thus simplifying transport. Occasionally, drying may lead to a great decrease in the volume of the product, leading to a decrease in storage space requirements. Studies have shown that dependence purely on experimental drying practices, without mathematical considerations of the drying kinetics, can significantly affect the efficiency of dryers, increase the cost of production, and reduce the quality of the dried product. Thus, the use of mathematical models in estimating the drying kinetics, the behavior, and the energy needed in the drying of agricultural and food products becomes indispensable. This paper presents a comprehensive review of modeling thin‐layer drying of fruits and vegetables with particular focus on thin‐layer theories, models, and applications since the year 2005. The thin‐layer drying behavior of fruits and vegetables is also highlighted. The most frequently used of the newly developed mathematical models for thin‐layer drying of fruits and vegetables in the last 10 years are shown. Subsequently, the equations and various conditions used in the estimation of the effective moisture diffusivity, shrinkage effects, and minimum energy requirement are displayed. The authors hope that this review will be of use for future research in terms of modeling, analysis, design, and the optimization of the drying process of fruits and vegetables. 相似文献
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M. McSweeney 《Critical reviews in food science and nutrition》2015,55(5):660-669
This review presents an overview of drying technologies and its impact on the polyphenol content of vegetables and fruits. Polyphenols contribute to many health benefits and can act as antioxidants. Specifically an increased intake of polyphenols has been shown to decrease the incidence of cardiovascular disease; furthermore, it has been shown to help reduce the risk of neurodegenerative diseases in humans. Many researchers have reported on the effect of different drying techniques on the polyphenol content in fruits and vegetables. Polyphenol degradation mechanisms proposed in literature and pretreatments that potentially lead to higher retention of polyphenols during drying are also discussed. 相似文献
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