不同光照条件对啤酒花中黄腐酚异构化影响

Effect of different light conditions on the photoisomerization of xanthohumol in hops

中文关键词:  光照条件  啤酒花  黄腐酚  光异构化

英文关键词:light conditions  hop  xanthohumol  photoisomerization

中文摘要:

      目的 研究不同光照条件, 如光照强度、光照时间、处理光的波长等因素对啤酒花中黄腐酚(xanthohumol, Xn)光异构化的影响。方法 啤酒花样品在不同光照强度、光照时间、波长和不同颜色玻璃瓶储藏条件下处理后, 于OD370 处测量Xn含量。结果 相同功率光源的紫外光引起Xn异构化较白光显著(P<0.05), 白光照射Xn样品随着光照时间和光照强度的增大, Xn光异构化程度提高; 相同功率光源及光照时间条件下, 红光[(625±5) nm]、黄光[(590±5) nm]、绿光[(555±5 ) nm]、蓝光[(450±5) nm]处理引起的Xn异构化速度差异极显著(P<0.01), 其中蓝光最强, 其次是绿光、红光、黄光; 白光光源光照条件下, 深棕色玻璃瓶储存对Xn的稳定性显著优于绿色、蓝色、无色玻璃瓶等(P<0.05), 并且深棕色玻璃瓶长期储存Xn显著优于绿色玻璃瓶(P<0.05)。结论 光照时间、波长及储存条件对Xn光异构化有显著的影响, 且避光储存利于Xn稳定, 这为含有Xn的饮品、食品、保健品等的光照或包装条件的选择提供了依据。

英文摘要:

      Objective To study the effects of different light conditions, like light intensity, time and wavelength on the photoisomerization of xanthohumol (Xn) in hops. Methods The Xn content of beer pattern was measured at OD370 after being treated in glass bottles with different light intensity, light time, wavelength and color. Results Xn isomerization induced by ultraviolet light with the same power source was more significant than that caused by white light (P<0.05), and the degree of Xn isomerization increased with the increase of illumination time and intensity. Under the same power source and illumination time, the differences of Xn isomerization rate caused by red light [(625±5) nm], yellow light[(590±5) nm], green light [(555±5) nm] and blue light[(450±5) nm] were highly significant (P<0.01), among which blue light was the strongest, followed by green light, red light and yellow light. Under the condition of white light source, the stability of Xn stored in dark brown glass bottles was significantly better than that in green, blue and colorless glass bottles (P<0.05), and the long-term storage of Xn in dark brown glass bottle was significantly better than that in green glass bottle (P<0.05). Conclusion The light time, wavelength and storage conditions have significant effects on Xn photoisomerization and storage away from light is good for Xn stability, which provides experimental basis for the selection of lighting or packaging conditions for drinks, food, health products containing Xn.