天然食用色素花青素的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化花青素的壁材组成以及工艺条件。结果表明,花青素/壁材为25%,明胶/海藻酸钠为1∶4,壳聚糖浓度为0.75%;喷雾干燥的进口温度130℃,出口温度90℃时,花青素的微胶囊化效果最好,包埋率高。微胶囊化花青素的稳定性明显提高。      

天然色素花青素的微胶囊化研究

研究喷雾干燥法制备高包埋率微胶囊化花青素的壁材组成以及工艺条件,结果表明:花青素∶壁材为20%、麦芽糊精∶β-环状糊精为3∶1、阿拉伯胶比例为10.0%、喷雾干燥的进口温度120℃、出口温度80℃时,花青素的微胶囊化效果最好、包埋率高,而且花青素微胶囊化后,其稳定性有显著提高。     

天然食用色素紫甘薯花青素的稳定性研究

采用乙醇浸提法提取紫甘薯花青素,考察了紫甘薯花青素的稳定性。紫甘薯花青素是水溶性色素,具有较强的耐热性,避光保存花青素的稳定性最好。食品防腐剂对紫甘薯花青素的稳定性无明显影响;葡萄糖、蔗糖对花青素有一定的护色作用;VC对紫甘薯花青素影响较明显;H2O2,Cu2+和Fe2+对紫甘薯花青素的稳定性影响较大,其中Cu2+,Fe2+会使花青素溶液变浑浊。     

天然食用色素——花青素应用研究进展

花青素长期被人类食用,并且植物资源丰富.介绍了其作为一种天然食用色素的应用研究进展.     

天然食用色素——花青素应用研究进展

花青素长期被人类食用,并且植物资源丰富,介绍了其作为一种天然食用色素的应用研究进展。     

多孔淀粉对葡萄籽原花青素的吸附及胶囊化研究

研究了多孔淀粉对葡萄籽原花青素的吸附能力,并以3种壁材(明胶、明胶-蔗糖、明胶-阿拉伯胶)包埋多孔淀粉-原花青素复合物.结果表明,多孔淀粉对原花青素的吸附速度较快,每克干多孔淀粉能吸附约40 mg原花青素.3种壁材均有较好的包埋效果,包埋效率在87.1%～98.4%,但总体的包埋率较低.     

番茄红素徼胶囊化的研究

本文对以明胶和蔗糖等多种配方作为壁材，喷雾干燥制备番茄红素微胶囊的工艺进行了探讨。研究表明，经微胶囊化后大大提高了番茄红素的稳定性：添加抗氧化剂可提高微胶囊化过程中番茄红素的保留率：微胶囊化效率较好的番茄红素产品皆为橙红色粉末，其水溶性、流动性和稳定性均佳。     

利用变性淀粉徼胶囊化徼藻单细胞DHA油脂的研究

本文研究变性淀粉作为壁材对DHASCO的微胶囊包埋效果及其氧化稳定性。实验结果表明，变性淀粉是一种优良壁材，能有效地包埋DHASCO；特别是National变性淀粉包埋的DHASCO，其表面油和溶剂浸出率最低，包埋率最高，室温存放6个月DHA仅降低3．26％；不过，与阿拉伯胶比较，变性淀粉的氧化稳定性较差。     

抗氧化剂二丁基羟基甲苯（BHT）的微胶囊化

研究了喷雾干燥法制备高包埋率微胶囊化二丁基羟基甲苯(BHT)的壁材组成及工艺条件。结果表明，最佳组合为：BHT／壁材20％、阿拉伯胶／麦芽糊精1：3、海藻酸钠含量0．6％、乳化温度70℃、一级均质压力20MPa、二级均质压力45MPa、喷雾干燥进风温度200℃、出风温度90℃，该工艺条件下BHT的微胶囊化效果最好，包埋率最高。     

乙基纤维素徽胶囊化蓝莓花色苷的研究

以乙基纤维素作为壁材,对蓝莓花色苷进行微胶囊化.其工艺条件为:聚乙二醇含量15%,芯材与壁材比1:19,固形物含量4%.蓝莓花色苷微胶囊在模拟胃液中释放率比较高.蓝莓花色苷微胶囊化后,光稳定性明显提高.     

黑果腺肋花楸花色苷微胶囊化的研究

研究黑果腺肋花楸花色苷微胶囊化,增加其稳定性,提高附加值。采用喷雾干燥法制备花色苷微胶囊,以包埋率为指标,采用正交试验优化花色苷微胶囊工艺条件,利用高效液相色谱测花色苷含量。结果表明,最佳工艺条件为:壁材(阿拉伯胶与麦芽糊精)质量比2∶3、芯壁质量比2∶8、入口温度120℃、进料量15 mL/min。花色苷微胶囊化后稳定性明显提高。     

喀什小檗花色素微胶囊化工艺及产品特性

建立喷雾干燥法制备喀什小檗花色素的微胶囊工艺。采用单因素试验和正交试验筛选合适的壁材及配方,通过喷雾干燥法制备喀什小檗花色素的微胶囊产品。结果表明：花色素:壁材1:5、麦芽糊精:β-环糊精 1:6、固形物含量30%、乳化剂阿拉伯树胶1.0%、喷雾干燥进口温度160℃、出口温度80℃时,喀什小檗花色素的包埋率最高。稳定性实验表明微胶囊化的喀什小檗花色素对光、温度、碳水化合物、氧化剂、还原剂、金属离子等的稳定性都有一定程度的提高。     

紫玉米花色苷微胶囊化工艺和性能研究

采用响应面分析法优化紫玉米花色苷微胶囊化的配方及工艺,并对其微观特性进行表征。结果显示：喷雾干燥入口温度是影响紫玉米花色苷包埋率最主要因素;紫玉米花色苷最佳工艺为紫玉米花色苷占总固形物质量分数15%、麦芽糊精占总固形物质量分数45%、总固形物质量分数为25%和喷雾干燥入口温度140℃,在最佳工艺条件下,紫玉米花色苷包埋率为95.2%;扫描电镜和激光粒度仪分析进一步验证当喷雾干燥入口温度为140℃时,微胶囊化紫玉米花色苷的表面无明显裂痕和孔洞,粒径分布均比较集中(2～30μm),峰值出现在7.13μm。     

Microencapsulation of Anthocyanins from Grape Skins by Whey Protein Isolates and Different Polymers

Binding of anthocyanin extract from grapes (Feteasc? neagr? variety) by whey protein isolate was first estimated through fluorescence spectroscopy quenching experiments. The data were analyzed using the modified Stern-Volmer equation, allowing the estimation of binding and thermodynamic parameters. The increase of binding constants, accessible fractions, and number of binding sites was highlighted when increasing the temperature, suggesting the presence of the dynamic quenching process. The HPLC analysis allowed the identification of anthocyanin composition of extract and powders, highlighting the presence of the malvidin-3-glucoside as the main anthocyanin. Molecular docking tests provided strong evidence on the involvement of α-lactalbumin and β-lactoglobulin in the tight binding of malvidin-3-glucoside. Further, grape anthocyanins were encapsulated within whey protein isolate and two different polysaccharides (acacia gum and pectin) by coacervation, followed by freeze-drying. The encapsulating efficiency varied between 94 and 99%. Two size smaller particles were obtained in case of microencapsulation in the presence of pectin when compared with acacia gum, as revealed by laser confocal scanning microscopy investigations. Significantly, the experimental variant with pectin allowed the entrapment of a higher amount of flavonoids. The antioxidant activities of the two experimental variants were comparable. The thermal stability experiments evidenced a relatively higher protective effect on anthocyanin degradation in the variant with pectin.     

Anthocyanins from Eugenia brasiliensis edible fruits as potential therapeutics for COPD treatment

Nine anthocyanins (1–9) from the edible fruits of Eugenia brasiliensis were identified by HPLC-PDA and LC–MS, and seven of these are described for the first time in this Brazilian fruit. Two of the major anthocyanins, delphinidin (8) and cyanidin (9), were studied for their inhibitory activity against chemokine interleukin-8 (IL-8) production before and after cigarette smoke extract (CSE) treatment of cells. In non-treated cells the amount of IL-8 was unchanged following treatment with cyanidin and delphinidin in concentrations 0.1–10 μM. Both delphinidin (8) and cyanidin (9) decreased the production of IL-8 in treated cells, at 1 and 10 μM, respectively. Delphinidin (8) demonstrated IL-8 inhibition in the CSE treated cells in a dose-dependent manner.