|
KMID : 1011620070230040443
|
|
Korean Journal of Food and Cookey Science
2007 Volume.23 No. 4 p.443 ~ p.451
|
|
|
The Antioxidant Activity of Korean Cactus (Opuntia humifusa) and the Quality characteristics of Cookies with Cactus Powder added
|
|
한임희:Han Im-Hee
이경애:Lee Kyong-Ae/변광의:Byoun Kwang-Eui
|
|
|
Abstract
|
|
|
|
In order to better understand the quality of Korean cactus, Opuntia humifiisa, as the functional foodstuffs, it's seeds, stems and fruits were analyzed. In addition, we performed quality evaluation on cookies manufactured with cactus powder added. The results showed the soluble nitrogen-free component levels in the cactus to be very high. The highest component levels were crude fiber(48.75%) and crude fat(7.38%) in ihe seeds, crude ash( 15.39%) in the stems, and moisture( 11.26%) and crude protein(8.79%) in the fruits. The antioxidant activities of the cactus were evaluated based on peroxide values(POV), thiobarbituric acid reactive substances(TBARS value), and electron donating ability(EDA) using the DPPH method. The POVs for soybean oil containing a 0.05% concentrated water extract from each part of the cactus revealed a remarkable antioxidant effects on peroxidation as storage time increased The TBA values were 63.65% in BHT, 60.67% in the stems, 57.31% in the fruits and 49.16% in the seeds. The ED As were 30.26% in the stems，25.89% in the fruits, and 25.65% in ihe seeds. The total polyphenol contents of the water soluble materials from the cactus were 3.14 g/100 g in the fruits, 2.93 g in the stems and 2.11 g in the seeds. For the cookies, as the amounts of fruit and stem powder increased, the spreadness was significantly lowered, but moisture content was increased compared to the control. The color degree of the cookies changed from dim to intense as more fruit powder was added, resulting from a decrease in the L- and b-values and a significantly increased a-value. With the addition of stem powder, the L- and a-values revealed no significant differences, while the b-value was lowered compared to the control as more stem powder added. For texture changes of the fruit cookies, there were significant differences in hardness, guinminess, cohesiveness, springiness and brittleness. The stem cookies, however, showed only differences in hardness, gumminess, and brittleness, and not in cohesiveness and springiness. Finally, an overall sensory preference was found with the 1% fruit powder and 3% stem powder additions.
|
|
|
KEYWORD
|
|
|
Opiuitia humifusa, antioxidant activity, polyphenol, cookies, texture
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|
|