虾青素运载体系的研究进展

虾青素作为一种天然强抗氧化剂,不仅具有强抗氧化功效,还具有降血糖、抗炎、抗癌等生物功效。目前国内外均有生产虾青素的公司,且它们的产品广泛应用于水产饲料、保健品、医药等领域,这些行业对原材料的要求颇高,但虾青素存在水溶性低、稳定性差、合成成本高等问题,严重影响其产业应用。因此探究运用包埋技术保藏虾青素成为目前的研究热点,多种运载体系已被证明可以提高虾青素的稳定性和生物利用度。该综述回顾了基于虾青素运载体系的最新进展,并以脂质体、微胶囊、乳液为代表进行阐述。通过比较三种运载体系的包埋率、生物利用度、优缺点等方面,以期为虾青素的运载体系研究与应用提供参考,为虾青素市场应用提供科学依据。     

虾青素的生物功效及其运载体系研究现状

虾青素是一种天然抗氧化剂,不仅具有强抗氧化功效,还具有抗炎、抗糖尿病、抗肿瘤等生物功效。但是由于水溶性低、见光易分解等特性,限制了其在功能性食品、医药等领域中的应用。近年来,大量研究利用运载体系负载虾青素以降低降解速率,提高其生物利用度,从而扩大虾青素的应用范围。该文结合虾青素的生物功效,对不同运载体系的负载特性进行了综述,选择合适的运载体系可以有效改善虾青素的生物功效,对提高虾青素的稳定性和生物利用度具有重要意义。同时,对实现虾青素靶向转运和吸收提供参考依据。     

虾青素研究进展

虾青素是一种极具潜力的色素和抗氧化剂,在水产养殖、食品和医药化工行业具有广阔的应用前景。本文对虾青素的生物学功能、生物来源及应用等方面进行了论述     

虾青素研究进展

虾青素是一种极具潜力的色素和抗氧化剂,在水产养殖、食品和医药化工行业具有广阔的应用前景。本文对虾青素的生物学功能、生物来源及应用等方面进行了论述      

喷雾干燥制备虾青素微胶囊的工艺研究

以新烯基琥珀酸淀粉酯和麦芽糊精为壁材,虾青素大豆油悬浊液为芯材,对喷雾干燥法制备虾青素微胶囊的配方和工艺进行了研究,并对微胶囊化虾青素与未微胶囊化虾青素进行稳定性实验。实验得到最佳工艺条件为:新烯基琥珀酸淀粉酯∶麦芽糊精为1∶1,均质压力为50MPa,进口温度为190℃,出口温度90℃。稳定性实验表明,虾青素的微胶囊化能够明显减少虾青素的氧化,虾青素稳定性提高近8倍。      

喷雾干燥制备虾青素微胶囊的工艺研究

以新烯基琥珀酸淀粉酯和麦芽糊精为壁材,虾青素大豆油悬浊液为芯材,对喷雾干燥法制备虾青素微胶囊的配方和工艺进行了研究,并对微胶囊化虾青素与未微胶囊化虾青素进行稳定性实验.实验得到最佳工艺条件为:新烯基琥珀酸淀粉酯:麦芽糊精为1:1,均质压力为50MPa,进口温度为190℃,出口温度90℃.稳定性实验表明,虾青素的微胶囊化能够明显减少虾青素的氧化,虾青素稳定性提高近8倍.     

虾青素生产方法研究进展

虾青素作为一种具有特殊生理功效的物质,其抗氧化作用和着色作用在食品、药片、饲料以及化妆品行业有着广阔前景。本文主要论述了虾青素生产方法的研究进展。     

虾壳虾青素提取液稳定性研究

[研究目的]研究虾壳虾青素提取液的稳定性,[研究方面]从保存条件、光照、温度、pH值、氧化剂、还原剂、金属离子等方面对虾壳虾青素稳定性的影响进行了研究。[研究结果]光照、温度、氧气都能影响到虾壳虾青素的稳定性,其中光照对其影响最为显著。对于虾壳虾青素提取液,在高温下不稳定;对室外日光不稳定,对室内光较稳定;在弱碱性环境中较稳定;加入Fe^2＋、Fe^3＋、Cu^2＋、Zn^2＋、Ca^2＋、Mg^2＋、Na^＋金属离子硫酸盐溶液中,对色素均有一定的破坏作用,以Fe^2＋最为不稳定;低浓度抗氧化剂VC、VE对色素有一定的保护作用,氧化剂对其有一定的破坏作用。     

天然虾青素的研究进展

对天然虾青素的研究概况进行了综述。虾青素有多种结构形式,具有抗氧化抗衰老等生物活性,在食品、药品、饲料添加剂以及化妆品领域都具有广阔的应用空间。目前天然虾青素的来源主要是海藻和微生物,针对目前天然游离虾青素的工业化分离纯化面临的问题,对未来的发展进行了展望。     

虾青素抗氧化能力研究进展

虾青素是一种氧化型类胡萝卜素,主要来自微生物和海洋生物,因其特殊的化学结构而具有较强的抗氧化活性,从而被广泛应用于保健食品、医疗卫生等领域。本文从虾青素清除自由基能力、限制氧化剂渗透进细胞内、增加抗氧化酶活性、降低DNA的氧化损伤、抑制脂质过氧化5个方面阐述了虾青素的抗氧化机制,从体外清除自由基活性、油脂体系中抑制脂质氧化降解以及虾青素抑制促氧化酶、增强抗氧化酶活性3个方面阐述了虾青素的抗氧化能力,且综述了虾青素与其他天然抗氧化剂如番茄红素、叶黄素、β-胡萝卜素、维生素C和维生素E的抗氧化能力对比进展,为虾青素抗氧化活性的进一步研究提供参考。     

Recent Approaches in the Development of Encapsulated Delivery Systems for Probiotics

The concept of probiotics has been well-known for more than a century. The availability and survival of the consumed probiotics in the colon has not been proved convincingly and needs further studies and clarification. It was not known whether the fastidious probiotics could reach the targeted site of action due to gastrointestinal stress. However, probiotics must sustain themselves in high number, survive during passage through the stomach to the intestine, and react symbiotically with the host when they reach the colon. This review consolidates some of the recent findings and new strategies on the development of a delivery system for targeted colonic delivery of probiotics.     

食品运载体系包埋姜黄素的研究进展

姜黄素具有抗氧化、抗肿瘤、降血脂和预防老年痴呆等多种生理功能,还可以用作天然着色剂、食品防腐剂、抗氧化剂等;然而水溶性差、不稳定、代谢速度快、生物利用率低等缺陷限制了其在食品领域中的应用.利用食品运载体系,以天然生物分子为材料制备姜黄素的传递载体可以解决上述问题.本文介绍了姜黄素的结构特征和理化性质,以及限制其利用的主...     

复配海藻酸盐凝胶作为传递体系的研究进展

海藻酸钠是传递体系中应用最广泛的聚合物多糖之一,以其为原料制备的凝胶常被用作生物活性化合物和药物等物质的运输载体,在食品和药品领域具有较大的应用潜力.目前复配凝胶法已被用于改善单一海藻酸盐凝胶的机械性能和应用缺陷,并且应用形式多样.本文综述了海藻酸钠的结构与基本性质,重点介绍了近年来海藻酸钠复配凝胶的研究状况,包括与多...     

Production of O/W Emulsions Containing Astaxanthin by Repeated Premix Membrane Emulsification

ABSTRACT: Oil-in-Water (O/W) emulsions are mainly produced by application of high mechanical stress or by membrane emulsification processes at low pressures. Advantages such as narrower droplet size distribution and lower operating costs make membrane emulsification processes more suitable for producing astaxanthin-loaded O/W emulsions. The characteristics of 1 of these membrane emulsification methods, called repeated premix membrane emulsification, are studied in this work. In this emulsification process, a pre-emulsion is repeatedly pushed through a hydrophilic or hydrophobic membrane. In this research, ahydrophilic membrane was used because the objective was to obtain an O/W emulsion. Pre-emulsions were produced by dispersing palm oil containing dissolved astaxanthin in water. The oil droplets were stabilized with a combination of 2 emulsifiers. Each O /W emulsion passed the membrane 3 times underpressures and disperse phase fractions of 5 to 15 bar and from 10 wt% to 40 wt%, respectively. To investigate the production of O/W emulsions by repeated premix membrane emulsification, mean Sauter diameters and fluxes were measured. To find the optimal ranges of pressure and dispersed phase fraction, a "2-level factorial design with central composite and stars points" experimental design was applied.     

槲皮素及其递送体系的研究进展

槲皮素是一种广泛存在于食品中的生物活性物质,具有抗氧化、抗炎症、抗肿瘤、预防心血管疾病等功效。为解决其水溶性差、稳定性低等问题,前人已围绕着槲皮素的递送体系展开了大量研究。为此,本文结合国内外研究进展,从槲皮素的理化特性、生物活性、稳定性、体内代谢及其递送体系的角度进行了综述。并在此基础上对槲皮素及其递送体系的安全性进行了介绍,旨在为拓展其在食品领域的应用提供相关理论依据。     

Astaxanthin Extraction from Shrimp Wastes and its Stability in 2 Model Systems

Abstract: The objective of this work was to study the stability of astaxanthin, obtained from shrimp wastes, and incorporated to 2 model systems: egg albumin protein solution and sunflower oil. Shrimp wastes were ensiled by a treatment with formic/acetic acids (4%–4% v/w wastes) and stored at 4 °C for 24 h. The pigment was extracted with organic solvents (petroleum ether:acetone:water, 15 : 75 : 10) and concentrated. The storage parameters studied were: illumination (light/dark), temperature (4/20 °C), atmosphere (air/air-free), and storage time (0, 1, 2, 3, 4, 5 wk). Results showed that total xantophylls and astaxanthin were more stable in sunflower oil than in the protein system. Total xantophylls showed more stability than astaxanthin, possibly due to the presence of other, more stable carotenoids quantified together with xantophylls. Astaxanthin concentration was significantly affected by storage time; its degradation followed a first-order reaction rate under all the studied conditions. This pigment was stable only for 17 d, even when stored in air-free flasks, under refrigeration, and in the dark. Practical Application: Shrimp catching and farming generate large amounts of polluting wastes; they can be an important source of added-value red-orange pigments. However, these pigments are highly unstable to various transformation processes and to storage conditions. This research studied the effect of storage on 2 model systems (protein and lipid) on pigment degradation.     

白藜芦醇的生物活性及其运载体系研究进展

白藜芦醇是一种主要存在于葡萄、花生、虎杖等植物中的天然多酚,具有抗氧化、抗菌消炎、抗心血管疾病、抗肿瘤等多种生物活性,在食品、药品及日化品领域都有广泛应用。但由于白藜芦醇性质不稳定、水溶性差等特点,限制了其应用范围,因此,利用运载体系提高其生物利用度是一个关键的研究方向。本文总结了白藜芦醇理化性质及生物活性,并对近年来有关白藜芦醇的运载体系进行综述,提出现有运载体系存在的问题,以期为白藜芦醇的运载体系的发展提供参考。     

虾青素的提取及其稳定性的研究

以虾头、虾壳为原料,研究了有机溶剂提取虾青素的条件及其稳定性。结果表明,用乙酸乙酯在pH4.0、50℃条件下提取2.5h虾青素的产量为49.1μg/g原料。研究还发现:紫外光对虾青素的破坏作用很大,而可见光较小;70℃以下、pH4～11范围内虾青素较稳定;Ca2 、Mg2 、K 、Na 、Zn2 金属离子对虾青素基本没影响,Fe2 、Fe3 、Cu2 有明显破坏作用,Fe3 对虾青素的影响最大。