吸光度
尿酸
抗坏血酸
化学
水溶液
房水
色谱法
色氨酸
吸收(声学)
酪氨酸
生物化学
食品科学
氨基酸
有机化学
眼科
医学
材料科学
复合材料
作者
Amund Ringvold,Erlend Anderssen,Inge Kjønniksen
出处
期刊:PubMed
日期:2000-07-01
卷期号:41 (8): 2067-9
被引量:4
摘要
To analyze the components responsible for the UV absorbance in diurnal bird aqueous humor.The absorbance studies were carried out using a Hitachi spectrophotometer (U 2000). Uric acid was determined by high-performance liquid chromatography (LC-10 system; Shimadzu, Kyoto, Japan). Chicken and turkey eyes were examined.The UV absorbance in chicken aqueous was largely accounted for by the presence of protein, tryptophan, tyrosine, ascorbic acid, and uric acid. Ascorbic acid was low (23 micromol/l). Uric acid was, on the other hand, remarkably high (151 micromol/l) compared with that in mammals (cattle, 16 micromol/l). Principally the same results were obtained in chicken and turkey.Uric acid is a significant UV-absorbing substance in the aqueous humor of diurnal birds with its peak absorbance at 292 nm. The hypothesis that the aqueous humor acts as a UV filter seems to be valid also for the avian eye. However, in these eyes uric acid fulfills the role that ascorbic acid does in mammals.
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