Nutritional Compositions and Antioxidative Capacity of Red and Yellow Color of Immature and Matured Corn Silks and Sensory Acceptability of its Tea Grown in Ethiopia
| dc.contributor.advisor | Zewdu, Ashagrie (PhD) | |
| dc.contributor.author | W/Gebrail, Mersha | |
| dc.date.accessioned | 2019-08-29T12:39:13Z | |
| dc.date.accessioned | 2023-11-09T15:32:30Z | |
| dc.date.available | 2019-08-29T12:39:13Z | |
| dc.date.available | 2023-11-09T15:32:30Z | |
| dc.date.issued | 2018-10-01 | |
| dc.description.abstract | Corn silks are the female inflorescences of maize which arise from the fusion of two carpels that surrounds a single ovule. After a successful fertilization, this ovule becomes a kernel in the maize cob. During pollination, the tassel release amounts of pollen that are captured by the silks. This study was discussing on nutritional, antioxidant and antinutritional capacity of matured and immature silks of red and yellow color of the white corn and its tea that was collected from Merti agro industry zone Both immature and mature red and yellow corn silks were good source of nutritional compositions. Immature red and yellow silks contained significantly higher lipid (1.75% &1.5%) and protein (16.55% &14.87%). The mature red and yellow silk were, higher in composition of ash (8%), and total dietary fiber (40.22% & 36.61 %.) In mineral determination, immature red silk was rich source of Ca(22.07mg/100gm), K (3235.45mg/100gm), Na(16.01mg/100gm) Cu(7.5mg/100gm) and Mn(15.78mg/100gm) but Mg(20.43mg/100gm), Fe(14.01mg/100gm) and Zn(6.5mg/100gm) was higher in immature yellow silk. Ca(34.62mg/100gm), Mg(20.89mg/100gm), K(3196.7mg/100gm), Na(19.99mg/100gm), Mn(13.83mg/100gm) and Zn (7.1mg/100gm) were higher in mature red silk than yellow silk but Fe(14.63mg/100gm) was higher in matured yellow silk. DPPH antioxidant analysis methods polyphenol, flavonoid and free radical scavenging activities were computed, so the content of total polyphenol (1.98mgGAE/100gm & 2.1mgGAE/100gm) and flavonoid (3.96mgCE/100gm & 3.25mgCE/100gm) were higher in immature red and yellow silks respectively than mature red and yellow silks. Both matured and immature red (3.79 & 3.96mgCE/100gm) silks have higher flavonoid contents than yellow immature and matured (2.93& 3.25mgCE/100gm) silk. The free radical scavenging capacities EC50 were higher in immature red and yellow (3.84 & 3.79) silks than matured red and yellow (5.48 &6.57) silks respectively. Tannins were higher in immature red and yellow (9.63mg/100gm & 6.05mg/100gm) silks than matured red and yellow (3.43mg/100gm &1.71mg/100gm) silks respectively. Because of their antioxidant effects and the presence of higher amount of K in the corn silk it has health benefits, its tea from each type of corn silk were sensory acceptable by the panelists. | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/18906 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Corn Silk | en_US |
| dc.subject | Antioxidant | en_US |
| dc.subject | Nutritional Composition | en_US |
| dc.subject | Health Benefit | en_US |
| dc.title | Nutritional Compositions and Antioxidative Capacity of Red and Yellow Color of Immature and Matured Corn Silks and Sensory Acceptability of its Tea Grown in Ethiopia | en_US |
| dc.type | Thesis | en_US |