微波萃取技术在食品工业中的应用

微波萃取作为一种新的高新技术,具有许多突出的优点;本文探讨了微波萃取的机理、工艺流程和工艺条件,综述了微波萃取技术在食品工业中的应用,讨论了其工业化应用前景及存在的问题,以期加速其在食品工业中的应用。     

微波辐射技术在食品工业中的应用

叙述了微波萃取技术、微流加热技术，微波杀菌技术的机理和食品工业中的应用，并对微波辐射技术的发展前景进行了展望。     

微波辐射技术在食品工业中的应用

叙述了微波萃取技术、微波加热技术 ,微波杀菌技术的机理和在食品工业中的应用 ,并对微波辐射技术的发展前景进行了展望     

微波萃取技术在食品工业中的应用

微波萃取技术是近年来新发展起来的提取技术,与传统提取技术相比,具有提取时间短、温度低、耗能低、品质高等优良特性。微波技术的发展为食品研究提供了一种新型的萃取手段,且效果优良,被广泛的运用到食品各行业,本文对微波萃取技术的研究近况做了总结,为食品研究者提供了参考。本文着重从微波萃取技术的原理、微波萃取技术的特点、微波萃取的步骤、微波萃取在食品中的应用等方面进行阐述,通过举例子、列表对比、画图演示等方式为读者展示了微波萃取技术的优势。     

超临界CO2萃取技术在食品工业中的应用与研究进展

分析了我国食品工业发展的形势、发展及其应用新技术的必要性，论述了超临界CO2萃取技术在食品工业中应用的现状，提出了应用超临界CO2萃取技术进行食品开发的对策：加强有关基础研究和应用研究，把超临界CO2萃取技术的应用范围扩展到水溶液体系，为超临界CO2萃取食品中的具有特殊活性水溶性成分提供新方：去。     

微波技术在食品工程中的新应用展望

微波强化萃取、微波真空干燥及微波浓缩是微波能在食品工程中的先进应用技术、有广泛的应用前景,对食品、制药、生物化工等行业的生产过程将产生较大的变革和影响,能提高生产效率及产品质量。     

微波萃取在食品工业中的应用

微波萃取技术是一种快速、高效的提取新技术,目前已广泛应用于多种领域。文章对近年来微波萃取在食品安全及理化分析、食品营养成分及添加剂萃取和保健食品功效成分萃取等方面的应用研究作了综述,同时对微波萃取方式及微波萃取设备的发展前景进行了展望。     

微波辅助提取食品有效成分研究进展

微波辅助提取技术是近年食品工业应用先进技术。该文综述微波辅助提取食品有效成分工艺、机理及设备方面研究应用进展,最后展望微波辅助提取技术发展前景。     

比较几种萃取方法在食品加工中的应用

阐述了超临界流体萃取技术、微波萃取技术、双水相萃取技术等三种萃取技术的基本原理及其在食品工业当中的应用情况,从而说明了各种萃取技术在食品加工当中具有广泛的作用并且具有一定的互补效应。     

微波萃取技术及其在食品化学中的应用

介绍了微波辅助萃取(microwave-assistedextraction,MAE)技术的原理、特点、工艺流程及其技术要点,综述了近年来MAE技术在食品化学中的应用,指出MAE作为一种新的萃取技术,必将促进食品化学的发展。     

Optimized microwave-assisted extraction of total phenolics (TP) from Ipomoea batatas leaves and its antioxidant activity

An efficient microwave-assisted extraction (MAE) technique was employed to extract total phenolics (TP) from sweetpotato [Ipomoea batatas (L.) Lam.] leaves (TPSL). The optimal conditions for microwave-assisted extraction of TPSL were determined by response surface methodology. A face-centered cubic design (FCD) was applied to evaluate the effects of three independent variables (microwave power, extraction time and ethanol proportion) on the recovery of TPSL. The correlation analysis of the mathematical-regression model indicated that quadratic polynomial model could be employed to optimize the microwave extraction of TPSL. From response surface plots, microwave power, extraction time and ethanol proportion exhibited independent and interactive effects on the extraction of TPSL. The optimal conditions to obtain the highest recovery of TPSL were as follows: microwave power, 302 W; extraction time, 123 s; ethanol proportion, 53% (v/v). Under these optimal conditions, the experimental values agreed with the predicted ones by analysis of variance. It indicated high fitness of the model used and the success of response surface methodology for optimizing TPSL extraction. After method development, the antioxidant activity of the MAE extract was preliminarily evaluated. MAE showed obvious advantages in terms of high extraction efficiency and antioxidant activity of extract with in shortest extraction time.Industrial Relevance: Sweet potato leaves have been neglected except for a partial use as livestock feed in China. This study describes the response surface optimization of microwave-assisted extraction (MAE) process for the enhanced recovery of total phenolics from sweetpotato leaves (TPSL). MAE showed obvious advantages in terms of high extraction efficiency and antioxidant activity of extract within shortest extraction time. TPSL obtained using MAE showed potential for use in health-care food and pharmaceutical industry.     

Combination of emerging technologies for the extraction of bioactive compounds

Abstract

With the growing consumer demands for greener alternatives that do not involve toxic chemicals as well as the industry concerns of sustainable, nontoxic routes of extraction, the applications of novel extraction technologies in the food industry have been widely studied. This review discussed the novel extraction technologies including their mechanisms, protocols, influencing factors, advantages and drawbacks, as well as a comprehensive summary of the combination of the novel extraction technologies for phyto-bioactive compounds. Novel extraction methods, including ultrasound-assisted extraction (UAE), microwave-assisted extraction (MAE) and enzyme-assisted extraction (EAE), are considered as clean, green and efficient alternative to conventional extraction technologies. Their combinations, ultrasound-assisted enzymatic extraction (UAEE), microwave-assisted enzymatic extraction (MAEE) and ultrasonic microwave-assisted extraction (UMAE), can exhibit higher potential extraction ability. However, some of them need specific equipment. The food industry in the extraction sector should choose a proper extraction method which has a balance between product quality, process efficiency, production costs and environmentally friendly processes. The current review presented comprehensive references for future research on the novel extraction of phyto-bioactive compounds extraction.

1. Highlights

2. Novel clean, green and efficient alternative to conventional extraction technologies are discussed.

3. Combination of the novel extraction technologies for synergistic effects.

4. Minimal degradation and enhanced extraction yields.

5. Extraction mechanisms, advantages and drawbacks associated with novel extraction technologies.

     

Optimization of microwave-assisted extraction of triterpene saponins from defatted residue of yellow horn (Xanthoceras sorbifolia Bunge.) kernel and evaluation of its antioxidant activity

Microwave-assisted extraction (MAE) of triterpene saponins from defatted residue of yellow horn (Xanthoceras sorbifolia Bunge.) kernel was optimized in this study. Compared with the conventional extraction methods ultrasonic-assisted extraction (UAE) and heat reflux extraction (HRE), MAE possessed higher efficiency for the extraction of triterpene saponins. The MAE conditions including extraction temperature, extraction duration, irradiation power, ethanol concentration, ratio of solvent to material and extraction cycles were studied and optimized. The optimum extraction parameters were as follows: 51 °C, 7 min, 900 W, 32 ml/g, 42% (v/v) ethanol and 3 cycles. Under the above conditions, the highest extraction yield of triterpene saponins reached 11.62 ± 0.37% of defatted kernel, which was much higher than those of conventional extraction methods. In addition, MAE extract of triterpene saponins exhibited substantial free radical-scavenging activity with an IC₅₀ value of 0.782 mg/ml.

Industrial relevance

Large amounts of defatted kernels of yellow horn are discarded after oil extraction in biodiesel production. It is not only an environmental pollution but also a waste of bioresource. In fact, the residue still has potential for bioactive and medicinal use. Therefore, this study focused on the utilization of defatted kernels of yellow horn by optimizing MAE and evaluation of the antioxidant activity of the resulting extract. MAE provided a better way to deal with defatted kernels of yellow horn as a utilization of waste material of the bioactive resource in food and pharmaceutical industry.     

木瓜蛋白酶的提取及应用研究进展

本文主要介绍木瓜蛋白酶的组成,重点阐述提取方法、提取工艺的研究进展,进一步介绍木瓜蛋白酶在食品工业特别是在食品加工中的应用,并对其在医药、化工及未来食品加工方面的应用前景进行展望。     

超临界萃取技术在食品工业中的应用

综述了超临界萃取技术的原理、特点及其在食品中的研究进展,并介绍了超临界萃取技术在天然香料、色素的生产、油脂的提取分离、食品中功能成分的提取等方面的应用,并对今后的发展趋势作了预测。     

木瓜蛋白酶的分离方法及其应用进展

对亲和层析法、超滤膜分离法、沉淀分离法、溶剂萃取法、双水相萃取法等分离提取木瓜蛋白酶的方法进行了评述;综述了木瓜蛋白酶在食品、化工、纺织、医药等行业的应用进展。木瓜蛋白酶的产率、活性及应用性与其分离方法相关,指出今后需深入进行木瓜蛋白酶的亲和双水相萃取等新型分离方法的研究。     

Assisted extraction of rosemary antioxidants with green solvents

The use of natural antioxidants in the food industry has increased in the last years and there is a growing interest in improving the extraction processes using GRAS (general recognize as safe) solvents. In this work the extraction of antioxidants from rosemary with ethanol and water as solvents has been studied using different extraction processes (conventional, microwave assisted - MAE - and ultrasound assisted - USAE -) and plant pretreatments (deoiled and milled, deoiled and fresh plant). Total phenolic compounds in the extracts were determined by the Folin-Ciocalteu assay and HPLC with UV detection was employed for the quantitation of the main antioxidant compounds: rosmarinic acid and carnosic acid. The antioxidant activity of the extract was determined by the DPPH scavenging assay. The double pretreatment, deoiling by solvent free microwave extraction (SFME) and milling, has shown to be essential to overcome inner mass transfer limitations. Extraction efficiency can be additionally enhanced by microwave and ultrasound assisted extraction process, being this latter more significant in aqueous extracts.     

超临界萃取技术的应用研究进展

综述了超临界萃取技术的原理、特点及其在食品和医药中的研究进展，并介绍了超临界萃取技术在天然香料、色素的生产条件，油脂的提取分离，中药有效成分的提取，并对今后的发展趋势作了预测。     

Effects of Microwave and Ultrasound Assisted Extraction on the Recovery of Soy Proteins for Soy Allergen Detection

The extraction of soy proteins for soy allergen detections is conventionally achieved with PBS buffer for at least 2 h at room temperature or 4 °C. This method has been reported to be inefficient due to time consumption and inadequate protein extraction resulting in false negative allergen detection and mislabeling of foods containing allergenic proteins. This study investigated the application of microwave (MAE) and ultrasound assisted extraction (UAE) techniques to extract and improve recovery of allergens from various soy matrices. Soy proteins were extracted from raw soy flour, soy protein isolate (SPI) and soy milk using MAE at 60, 70, and 100 °C for 5 and 10 min and UAE at 4 and 23 °C for extraction times of 1, 5, and 10 min with PBS, Laemmli and urea buffers. Extracts were analyzed for total proteins, protein profile, and antibody‐based detection (ELISA) of soy proteins. Conventional extraction with each of the buffers was used as controls. Overall, proteins recovered from MAE and UAE samples were higher than recoveries from the controls in all soy matrices. Under all extraction conditions, Laemmli and urea buffer recovered more proteins than PBS. Electrophoresis analysis of protein showed bands around 75, 50, and 33 kDa indicating the presence of soy allergenic proteins β‐conglycinin and glycinin, in all samples. Using sandwich ELISA, control and UAE extracts resulted in high soy protein detection but this reduced in MAE extracts.     

调味香料留兰香精油的研究进展

留兰香精油是一种重要的调味香料,具有清新、凉爽、香甜的气味,主要用于糖果、酒类等食品的加香。另外,也应用于化妆品、药品等其它领域。文章综述了近年来留兰香精油的提取、提纯、化学成分及应用,并对留兰香精油的前景作了展望。