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分子蒸馏技术及在食品工业中的应用 总被引:4,自引:0,他引:4
分子蒸馏是一种新型的分离方法 ,它可以使一些常规蒸馏不能分离的热敏性物质和高沸点难分离物质实现分离。本文简要介绍了分子蒸馏的原理、特点及在食品工业中的应用。 相似文献
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浓香型白酒可控蒸馏技术的研究 总被引:2,自引:2,他引:0
通过对传统蒸馏工艺中存在的主要问题的研究,剖析了甑桶分离香味物质效率低下的本质。在应用萃取作用原理的基础上,成功地实现了浓香型白酒的可控蒸馏。经生产应用表明,可控蒸馏技术能大幅度地提高优质品率 相似文献
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介绍浓香型白酒蒸馏尾水中油状的香味物质分离方法、香味物质的名称及相对含量,以此油状物制成调味酒,应用于酒体勾调,达到丰产丰收,可提高产品质量、降低生产成本。 相似文献
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分子蒸馏技术在粮油工业中的应用 总被引:2,自引:0,他引:2
分子蒸馏是一种新型的用于液-液分离的分离技术,它克服了传统蒸馏操作温度高、受热时间长的缺点,能够分离一些在常规蒸馏不能分离的热敏性、高沸点、挥发性强、黏度高、易氧化的物质,被认为是目前最温和的蒸馏分离手段,同时分子蒸馏技术具有低能耗、高纯度、无污染等特点,在工业生产中有着广泛的应用,特别是天然产物的提取分离方面.本文叙述了分子蒸馏技术的基本原理、技术特点;着重介绍了分子蒸馏技术在粮食和油脂工业中的应用情况,包括分子蒸馏技术在油脂提取、不饱和脂肪酸分离、油脂脱酸、天然色素提取、天然抗氧化剂提取、甾醇、高碳脂肪醇提取等中的应用;对分子蒸馏技术的前景进行了分析,以期为粮油工业推广应用分子蒸馏技术提供理论和技术依据. 相似文献
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分子蒸馏亦称短程蒸馏,是一项较新的尚未广泛应用于工业化生产的分离技术,其应用能解决大量常规蒸馏技术所不能解决的问题。分子蒸馏是一种特殊的液——液分离技术,它依据分子运动平均自由程的差别,能使液体在远低于其沸点的温度下将其分离,特别适用于高沸点、热敏性及易氧化物质的分离。分子蒸馏进行时,液体混 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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海洋动植物油脂的开发与利用 总被引:1,自引:0,他引:1
中国有广阔的海洋 ,丰富的海洋资源 ,海洋动植物油脂是 2 1世纪中国油脂工业的新油源。通过对海洋动植物油脂资源的调查 ,分析了海洋动植物油脂结构、成分、氧化与抗氧化及其营养价值 ,对海洋动植物油脂在基因改良、超细微保健以及海洋水产品综合利用方面进行了探讨 ,并对海洋动植物油脂开发技术进行了探讨 相似文献