CIMO/Escola Superior Agrária, Instituto Politécnico de Bragança, Campus de Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
Food Chem Toxicol. 2011 Nov;49(11):2983-9. doi: 10.1016/j.fct.2011.07.054. Epub 2011 Jul 24.
Flowers from several common Mediterranean shrubs, such as those from the Cytisus genus and Genista genus (tribe Genisteae/Fabaceae) have long been used for medicinal purposes and seasoning in the northeastern Portuguese region. Despite, the shade-drying traditionally used to process these plants, freeze-drying is claimed to better preserve the quality of medicinal plants. Herein, the effects of drying process in the antioxidants composition and properties of Cytisus multiflorus, Cytisus scoparius, Cytisus striatus and Pterospartum tridentatum were evaluated. Freeze-dried P. tridentatum revealed the highest antioxidant properties (EC(50) values ≤ 0.15 mg/ml). Freeze-drying benefits were confirmed showing, the samples submitted to this process, higher antioxidant activity and higher concentrations of hydrophilic (phenolics, ascorbic acid and sugars) and lipophilic (tocopherols, chlorophylls and lycopene) compounds. This process could be applied in scale-up treatments of the studied plants for cosmetic or pharmaceutical applications.
几种常见的地中海灌木的花朵，如金雀花属和金雀花属（金雀花科/豆科）的花朵，长期以来一直被用于药用和调味在葡萄牙东北部地区。尽管传统上用于加工这些植物的是阴凉干燥，但冷冻干燥据称可以更好地保存药用植物的质量。在此，评估了干燥过程对多花金雀花、金雀花、金雀花和三齿滨藜抗氧化成分和性质的影响。冻干的三齿滨藜显示出最高的抗氧化性能（EC（50）值≤0.15mg/ml）。冷冻干燥的好处得到了证实，表明经过该过程处理的样品具有更高的抗氧化活性和更高浓度的亲水性（酚类、抗坏血酸和糖）和疏水性（生育酚、叶绿素和番茄红素）化合物。该工艺可应用于研究植物的规模化处理，用于化妆品或制药应用。
