High-temperature Thin-layer Drying Kinetic of Cultivated and Wild Algerian Olive Leaves

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
A. Boukhiar, S. Benamara, Yougourthane Bouchal, Kahina Touderte, Siham Messouidi
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引用次数: 1

Abstract

Olive leaves (OLs) are well known for being rich in oleuropein, their main bioactive molecule which has recently been attracting great interest from the scientific community due to its antiviral properties, including Covid-19 disease. Furthermore, the high-temperature/short-time drying process has found applications for various plants and food processing, which might be also implemented for the drying of OLs. This study focuses on: 1. the mathematical modeling of thin-layer high-temperature-drying (HTD) kinetic of olive (var. Chemlal and Oleaster) leaves, and 2. the determination of HTD effect on some physicochemical properties (oleuropein, chlorophylls, and CIELab color parameters) of the dried olive leaves (DOLs). For this, four drying temperatures (100, 120, 140, and 160 °C) were applied. For comparison purposes, low-temperature DOL samples were also prepared. The obtained data have shown that among the tens tested mathematical models, the Midilli et al. model describes more correctly experimental data for all drying temperatures and for both olive leaf varieties (R2 = 0.9960, SEE = 0.0085, RMSE = 0.0165 and χ2 = 0.0006). Moreover, the results show that the HTD at 120 and 160 °C does not differ from freeze-drying in terms of oleuropein retention (p < 0.05), highlighting the technological interest in the high-temperature/short-time drying process. Considering the biological value of oleuropein, in particular its antiviral activity, the study deserves further investigation in order to elucidate certain questions such as the storability of DOLs, and their valorization as fortification ingredient in food and pharmaceutical formulations, evaluation in vitro of their biological activities, etc.
栽培和野生阿尔及利亚橄榄叶的高温薄层干燥动力学
众所周知,橄榄叶(OLs)富含橄榄苦苷,橄榄苦苷是橄榄叶的主要生物活性分子,最近由于其抗病毒特性引起了科学界的极大兴趣,包括Covid-19疾病。此外,高温/短时间干燥工艺已在各种植物和食品加工中得到应用,也可用于ol的干燥。本研究主要集中在:1。1 .橄榄(化学橄榄和橄榄)叶片薄层高温干燥动力学的数学建模;测定HTD对干橄榄叶理化性质(橄榄苦苷、叶绿素和CIELab颜色参数)的影响。为此,应用了四种干燥温度(100、120、140和160°C)。为了比较,我们还制备了低温DOL样品。所获得的数据表明,在10个被测试的数学模型中,Midilli等人的模型更准确地描述了所有干燥温度和两个橄榄叶品种的实验数据(R2 = 0.9960, SEE = 0.0085, RMSE = 0.0165, χ2 = 0.0006)。此外,结果表明,在120和160°C的高温干燥与冷冻干燥在橄榄苦苷保留率方面没有差异(p < 0.05),突出了高温/短时间干燥工艺的技术兴趣。考虑到橄榄苦苷的生物学价值,特别是其抗病毒活性,该研究值得进一步研究,以阐明DOLs的可储存性、在食品和药物配方中作为强化成分的价值、体外生物活性评价等问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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