유색옥수수 종실의 호분층을 첨가하여 제조된 안토시아닌이 함유된 유색두부를 개발하여 농가소득 증진을 위한 기술로 활 용하고자 수행한 결과는 다음과 같았다. 호분층 분말의 크기 와 상관없이 유색옥수수 호분층 분말의 첨가량이 증가할수록 만들어지는 두부 무게량은 증가하였다. 유색옥수수 호분층 분 말을 첨가한 두부는 100% 콩을 이용한 두부보다 일반적으로 경도가 높았다. 안토시아닌 함량 분석 결과 분말첨가량이 증 가할수록 유색두부에 포함된 안토시아닌이 증가하였다. 항산 화 활성 측정 결과에서 유색 옥수수 종실의 호분층 분말 첨가 와 항산화 활성이 옥수수 종실의 호분층 분말의 농도 의존적 으로 높아졌다. 기능성성분인 안토시아닌 등을 함유한 유색옥 수수 종실의 호분층를 이용하여 흰색두부에 보라색을 첨가하 여 시각적 효과와 기능성 등을 향상 시킬 수 있다. 더불어 국 민 소비가 많은 두부에 옥수수를 첨가하여, 점차 고급화 되어 가고 있는 소비자의 기호도에 부응할 수 있는 고품질두부 생 산에 본 연구결과가 큰 기여를 할 것으로 추정된다.

This studies was carried out to assess antioxidant activity between flavonoid compounds (rutin, qurcetin, luteolin) and maysin(2''-O-6-C-(6-deoxy-xylo-hexose-4ulosyl)luteolin) isolated from corn silks of Zea mays L. Maysin extracted by corn silks was the highest free radical scavenging among flavonoid compounds such as rutin, qurcetin, and luteolin. But, the other flavonoid compounds(luteolin) showed the strongest free radical scanverning activity. In the results of peroxidase activity(POD), maysin don't indicated the remarkable peroxidase inhibiton activities. At the lowest concentration, NBT(Nitro blue tetrazolium) reduction activity of rutin, qurcetin, and luteolin were the low inhibition activities but maysin showed the highest Nitro blue tetrazolium reduction activity. Lipid peroxidase inhibition activities using Thiobarbituric acid(TBA) method, maysin showed the highest lipid peroxidase inhibition in three concentration levels..

Maize is expected to be planted in June after harvest of winter barley for the double cropping of forage maize-barley. But maize yield tends to be reduced rapidly with late planting after mid-May, so the pre-requisite of maize variety for the double cropping of maize-barley is less reduction of growth and yield at the condition of late planting in June. In order to select domestic forage maize variety adapted to late planting in June after barley harvest, Kwangpyeong-ok, Gangda-ok and Jangda-ok in 2007 and Kwangpyeong-ok, Gangda-ok and Cheongan-ok in 2008 were planted on June 13 and June 21, and plant growths and yields were compared with early planting on April 24 and May 31, respectively. In 2007, Ear number per plant was as high as 0.98 at Kwangpyeong-ok compared to 0.89 and 0.56 of Gangda-ok and Jangda-ok, respectively, at late planting on June 13. TDN and grain yield of Kwangpyeong-ok were the highest among three variety as 1,037 and 710 kg/10a, and yield reduction of Kwangpyeong-ok compared to early planting were 24% and 28 %, which were 7% and 8% lower than Gangda-ok and 22% and 50% lower than Jangda-ok, respectively. In 2008, TDN and grain yield at late planting on June 21 of Kwangpyeong-ok were also the highest among three varieties as 1,157 and 854 kg/10a at late planting on June 24, and yield reduction of Kwangpyeong-ok by late planting were 21% and 19%, which were 10% and 11% lower than Gangda-ok and 22% and 50% lower than Jangda-ok, respectively. It was concluded that proper maize variety adapted to late planting for the double cropping of forage maize-barley was Kwangpyeong-ok because of its higher ear bearing, less reduction of TDN and grain yields at the condition of late planting.