Total phenol contents, total flavonoid contents and antioxidant activity of 70% methanol, 70% ethanol and chloroform-methanol (CM, 2:1, v/v) extracts from onion (Allium cepa L.) peels were studied. The IC50 values of DPPH (2,2-diphenyl-1-picrylhydrazyl) radical and ABTS [2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt] radical scavenging activity in 70% ethanol extract were remained to be lowest followed by 70% methanol extract and CM extract. And the total phenol content (113.56±0.86 mg CAE/g), total flavonoid content (49.63 mg QE/g) and ferric reducing antioxidant power value were also found to be the highest. In contrast, 70% methanol extract possessed the strongest antioxidant activity by β-carotene bleaching assay. CM extract displayed the lowest antioxidant activity compared with other extracts. Onion peels exhibited strong antioxidant activity and abundant phytochemicals, which could be used in a various food products to add phytochemicals and promote good health.

The purpose of this study is to determine the possibility of using Agarum cribrosum as a natural health food source. To accomplish this purpose, the contents of the general and antioxidant activities of Agarum cribrosum were measured. The contents of carbohydrate, crude protein, crude lipid and ash were 45.4%, 15.0%, 2.3% and 33.1%. The calories of Agarum cribrosum were 262.3 kcal and total dietary fiber of Agarum cribrosum was 34.0%. The protein contained a total of 18 different kinds of amino acids. The content of amino acids was 12, 402.42 ㎎/100 g. The K was the largest mineral followed by Ca, Na and Mg, implying that Agarum cribrosum is an alkali material. The antioxidant activity of Agarum cribrosum was assessed by various radical scavenging assays using DPPH (2, 2-diphenyl-1 picrylhydrazyl), FRAP (ferric ion reducing antioxidant power), reducing power, and ABTS (2, 2'-azino-bis(3 ethylbenzothiazoline-6-sulphonic acid)). All antioxidant activity of Agarum cribrosum extract increased the concentration of the dependents. Total phenolic contents of Agarum cribrosum extract were 34.1±2.56 ㎎/g, and total flavonoids contents were estimated at 4.9±0.26 ㎎/g. General nutrients and other antioxidant bioactive materials in Agarum cribrosum were also potential materials for good health food. It is expected that a follow-up study of Agarum cribrosum through developing processed food and evaluation of their functional properties would provide useful information or sources of functional foods.

Wild grass is edible, and it grows in the mountains or field areas. Wild grass has diverse biological effects, such as antiobesity, anti-cancer, antioxidant activities and immune stimulation. Currently, many studies are aimed at enhancing the efficacy of medicinal foods on biological activity using a bioconversion technology, including the fermentation process. In this study, the quality characteristics and antioxidative activity of the fermented wild grass was investigated. The antioxidant activity of fermented wild grass was assessed by various radical scavenging assays using DPPH(2, 2-diphenyl-1-picrylhydrazyl), FRAP(ferric ion reducing antioxidant power), reducing power, and ABTS (2, 2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)). Moisture contents of the fermented wild grass is 49.6±0.06%. Contents of crude ash, crude protein, and crude fat were 0.65±0.01, 0.65±0.04, and 3.3±0.59%, respectively. Moreover, fermented wild grass showed that the hunter's color values were 80.36(lightnees), 11.47(redness), and 44.53(yellowness), respectively. Total phenolic contents of the fermented wild grass was 1, 185±159 ㎍ GAE(gallic acid equivalent)/g. The antioxidative activities of the fermented wild grass were significantly increased in a dose dependent manner. In addition, fermented wild grass did not show any cytotoxicity up to 500 ㎍/㎖. However, the anti-adipogenic effect of the fermented wild grass extract was barely detectable. This antioxidant potential is partly due to the phenolic compounds that are present in the fermented wild grass extracts.

식용꽃인 꽃베고니아(Begonia semperflorens ‘Superolympia White’), 토레니아(Torenia fournieri ‘Crown Pink’), 팬지(Viola tricolor ‘Solvetsunny Royal’) 및 펠라고니움(Pelargonium grandiflorum ‘Jessie Jarrett’) 추출물의 총페놀 함량, 전자공여능 및 세포독성에 미치 는 영향을 조사하였다. 에탄올 추출물의 총 페놀함량은 펠라고니움의 경우 531.57mg/100g으로 높게 나타났으 나 토레니아는 30.98mg/100g, 팬지는 14.62mg/100g, 꽃베고니아는 5.77mg/100g으로 낮게 나타났다. 전자공 여능은 꽃베고니아, 토레니아, 팬지의 열수 및 에탄올 추출물은 500g·mL-1에서는 모두 69.4% 이하를 나타 냈으나 펠라고니움의 열수 및 에탄올 추출물은 125g·mL-1에서도 각각 94% 내외를 나타내었다. 세포 생존율은 토레니아와 팬지의 열수 및 에탄올 추출물 처리구에서는 95% 이하를 나타내어 세포사가 일어난 것으로 추정되었다. 히스타민 억제효과는 펠라고니움 추출물의 경우 91% 이상을 나타냈으나 토레니아 추출 물은 51-66%, 팬지 추출물은 14-24%, 꽃베고니아 추 출물은 1~2%의 억제 효과만 나타났다.

The objective of this study was to identify the variation of individual phenol content and antioxidant activity in commercial oyster mushrooms and phellinus mushrooms . The total phenol content varied from 3488.2 to 7161.9 g g-1 in oyster mushroom(Pleurotus spp.). The total phenol content varied from 23390.3 to 26878.3 g g-1 in phellinus mushroom, containing about from four times to seven times more than oyster mushrooms. Among the seventy nine oyster mushroom varieties examined, Bupyeongsoyeob had the highest total phenol content and Keunneutari 1 had the lowest total phenol content. Most of king oyster mushroom(Pleurotus eryngii) varieties and ferula oyster mushroom(Pleurotus ferula)had tendency of low total phenol content. EDA(Electron Donating ability) using DPPH varied from 9.3 to 73.6% in according to oyster mushroom varieties. Most of king oyster mushroom had low antioxidant activity. We believe that the content of functional substances like total phenol content and the antioxidant activities in commercial oyster and phellinus mushrooms could be improved and such varieties strengthed might be selected for the utilization of future breeding resources, based from the results of our study.

최근에 유기 재배된 과실이 관행재배와 비교해서 건강관련 물질과 관련된 화합물이 다량 분포된다는 연구와 주장이 제기되어 왔지만, 국내에서는 두 가지 재배방법에 따른 과실품질을 분석한 연구는 미비한 실정이다. 본 연구는 유기농과 관행으로 재배 된 배 '신고'의 과실품질과 폴리페놀 및 항산화 활성을 조사하였다. 처리는 키틴 복합퇴비+키틴 액비(구역 A), 키틴 복합퇴비+적외선으로 처리 된 키틴 액비(구역 B), 그리고 관행재배 시스템(구역 C와 D)으