Nagai, T.; Kawashima, T.; Suzuki, N.; Tanoue, Y.; Kai, N.; Nagashima, T. 2007. Tea beverages made from Romanas rose (Rosa rugosa Thunb.) leaves possess strongly antioxidative activity by high contents of total phenols and vitamin C. Journal of food, agriculture & environment., vol. 5, no. 3-4, pp. 137-141,
Abstract
Three kinds of tea beverages, unfermented, half-fermented and fermented tea beverages, made from Romanas rose (Rosa rugosa Thunb.) leaves were prepared and the functional properties were investigated. These beverages exhibited high total phenols and total vitamin C contents. In particular, unfermented and half-fermented tea beverages possessed strongly antioxidative activities and scavenging activities against superoxide anion radical and DPPH radical. Moreover, these beverages also showed angiotensin I-converting enzyme inhibitory activities. Drinking tea beverage made from Romanas rose leaves may help to prevent in vivo oxidative damage, such as lipid peroxidation, associated with many diseases, including cancer, atherosclerosis, diabetes, aging, arthritis, brain dysfunction and immune deficiency because of the presence of various compounds such as catechin derivatives, phenols and vitamin C with antioxidative activities.

Descriptors
Rosa rugosa tea (beverage) antioxidant activity free radical scavengers reactive oxygen species angiotensin I enzyme inhibitors enzyme inhibition phenolic compounds ascorbic acid

中文大意

1. 以羅馬薔薇葉片為原料，製備了三種茶飲料，即未發酵、半發酵和發酵茶飲料，並對其功能特性進行了研究。
2. 這些飲料顯示出高總酚和總維生素 C 含量。 特別是未發酵和半發酵茶飲料具有很強的抗氧化活性和對超氧陰離子自由基和DPPH自由基的清除活性。
3. 此外，這些飲料還顯示出血管緊張素 I 轉換酶抑制活性。
4. 飲用由羅馬玫瑰葉製成的茶飲料可能有助於防止體內氧化損傷，例如脂質過氧化，與許多疾病相關，包括癌症、動脈粥樣硬化、糖尿病、衰老、關節炎、腦功能障礙和免疫缺陷，因為存在多種化合物 如具有抗氧化活性的兒茶素衍生物、酚類和維生素C。