Carotenoid, which occur naturally in corn grains, have been associated with reduced risk of degenerative
diseases. The aim of this research was to measure the carotenoid content of hexane extracts of six
commercial high-yield corn hybrids and determine the relationship between carotenoid content and
antioxidant activity. Levels of lutein, zeaxanthin, b-cryptoxanthin and b-carotene in hexane extracts were
determined using HPLC, and antioxidant activity was assayed using the TEAC system based on the 2,20-
azinobis(3-ethylbenzothiazoline-6-sulphonic acid) radical cation (ABTS+), and the TBARS system based
on a linoleic acid emulsion. Corn hybrids varied in carotenoid content and antioxidant activity in both
assays. Lutein and zeaxanthin were the predominant carotenoids; their levels were 15-fold higher than
those of b-cryptoxanthin and b-carotene. Antioxidant activity in both assays increased linearly with total
carotenoid content. Lutein and b-carotene were the primary contributors to TEAC activity, while lutein,
b-cryptoxanthin and b-carotene were primary contributors to TBARS activity.
Carotenoid, which occur naturally in corn grains, have been associated with reduced risk of degenerativediseases. The aim of this research was to measure the carotenoid content of hexane extracts of sixcommercial high-yield corn hybrids and determine the relationship between carotenoid content andantioxidant activity. Levels of lutein, zeaxanthin, b-cryptoxanthin and b-carotene in hexane extracts weredetermined using HPLC, and antioxidant activity was assayed using the TEAC system based on the 2,20-azinobis(3-ethylbenzothiazoline-6-sulphonic acid) radical cation (ABTS+), and the TBARS system basedon a linoleic acid emulsion. Corn hybrids varied in carotenoid content and antioxidant activity in bothassays. Lutein and zeaxanthin were the predominant carotenoids; their levels were 15-fold higher thanthose of b-cryptoxanthin and b-carotene. Antioxidant activity in both assays increased linearly with totalcarotenoid content. Lutein and b-carotene were the primary contributors to TEAC activity, while lutein,b-cryptoxanthin and b-carotene were primary contributors to TBARS activity.
การแปล กรุณารอสักครู่..
