共查询到20条相似文献,搜索用时 46 毫秒
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探讨果蔬深加工技术及新型果蔬干燥技术发展趋势。比较论述了真空冷冻干燥、微波干燥、真空油炸干燥技术特性,最后重点介绍了变温压差膨化干燥技术特点及国内外发展趋势,期望对果蔬干燥技术的研究与开发提供一定的参考性。 相似文献
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不同干燥方式对胡萝卜微粉品质的影响 总被引:2,自引:0,他引:2
采用热风干燥、真空干燥、变温压差膨化干燥技术及喷雾干燥技术制备胡萝卜微粉,对比4种胡萝卜微粉的理化性质及营养指标。试验结果表明:色泽中a*(红绿值):热风干燥真空干燥喷雾干燥变温压差膨化干燥;吸湿性:变温压差膨化干燥真空干燥热风干燥喷雾干燥;复水比:真空干燥热风干燥变温压差膨化干燥喷雾干燥;粒径:喷雾干燥热风干燥变温压差膨化干燥真空干燥。4种干燥处理后,热风干燥和真空干燥所得产品的VC和β-胡萝卜素含量相对较高,变温压差膨化干燥和喷雾干燥所得产品的总糖和还原糖含量较高。 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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《中国食品学报》2017,(8)
采用热风干燥、中短波红外干燥、真空冷冻干燥、热风-变温压差膨化干燥和中短波红外-变温压差膨化干燥5种干燥方式制备超微蒜粉,研究不同干燥方式对超微蒜粉的物理特性、营养品质及抗氧化性的的影响。结果表明:物理特性方面,热风-变温压差膨化干燥的超微蒜粉粒径最小,真空冷冻干燥的超微蒜粉色泽和吸湿性最高,热风和中短波红外-变温压差膨化干燥的超微蒜粉复水性最高,热风-变温压差膨化和真空冷冻干燥的超微蒜粉溶解性和堆积密度最高。营养品质方面,热风干燥的超微蒜粉硫代亚磺酸酯含量最高,中短波红外、中短波红外-变温压差膨化干燥的超微蒜粉总酚含量最高。从抗氧化性来说,中短波红外-变温压差膨化干燥的超微蒜粉具有最高的抗氧化性。综合评价:中短波红外-变温压差膨化干燥的超微蒜粉综合品质最好,适宜将其用于超微蒜粉的工业化生产。 相似文献
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干燥方法对超微枣粉品质的影响 总被引:1,自引:0,他引:1
本文研究了变温压差膨化干燥、中短波红外干燥、热风干燥和真空冷冻干燥4种干燥方式对超微枣粉品质的影响。结果发现:在物理特性方面,变温压差膨化干燥超微枣粉的色泽最好,中短波红外干燥和变温压差膨化干燥超微枣粉的粒径小,变温压差膨化干燥超微枣粉具有较好的溶解性,真空冷冻干燥法超微枣粉的堆积密度最大。在营养成分方面:4种干燥方法制备的超微枣粉的营养成分较鲜样均有不同程度的下降,变温压差膨化干燥、中短波红外干燥和热风干燥超微枣粉的总糖含量较高,总酸含量无显著差异;真空冷冻干燥超微枣粉的维生素C和黄酮含量显著高于其他干燥方法;真空冷冻干燥和变温压差膨化干燥有利于超微枣粉中环磷酸腺苷的保存。结论:变温压差膨化干燥超微枣粉的综合品质优于其他3种枣粉,该工艺生产效率高、成本低,是超微枣粉生产中较适宜的干燥工艺。 相似文献
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Figueroa-González I Quijano G Ramírez G Cruz-Guerrero A 《Journal of the science of food and agriculture》2011,91(8):1341-1348
Owing to their health benefits, probiotics and prebiotics are nowadays widely used in yogurts and fermented milks, which are leader products of functional foods worldwide. The world market for functional foods has grown rapidly in the last three decades, with an estimated size in 2003 of ca US$ 33 billion, while the European market estimation exceeded US$ 2 billion in the same year. However, the production of probiotics and prebiotics at industrial scale faces several challenges, including the search for economical and abundant raw materials for prebiotic production, the low-cost production of probiotics and the improvement of probiotic viability after storage or during the manufacturing process of the functional food. In this review, functional foods based on probiotics and prebiotics are introduced as a key biotechnological field with tremendous potential for innovation. A concise state of the art addressing the fundamentals and challenges for the development of new probiotic- and prebiotic-based foods is presented, the niches for future research being clearly identified and discussed. 相似文献
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常用消毒灭菌法及其机理与应用 总被引:3,自引:0,他引:3
介绍了采用消毒灭菌方法,有加热消毒法,紫外线辐射法和化学药剂消毒法。常用化学药剂有醛类、含氯消毒剂、醇类消毒剂以及高锰酸钾、生石灰等,阐释了消毒与灭菌两个概念的区别。 相似文献
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The objectives of the current study were to investigate the relationship between body condition score (BCS) and dairy form and changes in genetic parameters for BCS and dairy form within and across lactations and age. Body condition score and dairy form were obtained from the Holstein Association USA, Inc. Records were edited to include those cows classified between 24 and 60 mo of age and between 0 and 335 d in milk (DIM). A minimum of 20 daughters per sire and 15 cows per herd-classification visit were required. The dataset consisted of 135,178 records from 119,215 cows. Repeatability, multiple trait, and random regression models were used to analyze the data. All models included fixed effects for herd-classification visit, age within lactations 1, 2, and 3 or higher, and 5th-order polynomials for DIM. Random effects included sire and permanent environment for all models. Random regression models included age at classification nested within sire or DIM and lactation number nested within sire. Genetic variance for both BCS and dairy form was lowest in early lactation and highest in midlactation. Genetic correlations within and across lactations were high. The genetic correlation between DIM 0 in lactation 1 and DIM 305 in lactation 3 was estimated to be 0.77 for BCS and 0.60 for dairy form. The genetic correlation estimate between 30 mo of age at classification and 50 mo of age at classification was 0.94 for both dairy form and BCS. The repeatability models appeared to generate accurate evaluations for BCS or dairy form at all ages and stages of lactation. 相似文献
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