• 한국식품영양과학회지
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• 제41권1호
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• pp.110-115
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• 2012

본 연구에서는 복숭아 유과 씨의 품종에 따른 총 폴리페놀 함량과 항산화능, tyrosinase 저해활성 및 elastase 저해활성을 알아보고자 하였으며 폴리페놀 화합물과 총 항산화력 과의 상관관계를 비교 분석하고자 하였다. 품종별 복숭아 유과씨의 추출수율을 관찰한 결과, 몽부사에서 가장 높게 나타났으며, 5.20~6.16%의 수율을 갖는 것으로 관찰되었다. 총 폴리페놀 함량은 18.33~27.08 mg/g의 함량을 나타내었으며, DPPH 및 ABTS radical 소거능에서 천중도의 radical 소거능이 가장 높게 나타났다. Tyrosinase 저해활성에서는 용택골드, 천중도백도에서 높은 tyrosinase 저해능을 보였으나, elastase 저해활성에서는 마도카에서 다른 품종에 비해 유의적으로 높은 elastase 저해능을 보였다. 총 폴리페놀 함량과 항산화활성과 높은 상관관계를 가졌으며 항산화능과 tyrosinase 저해활성 또한 비교적 높은 상관관계를 나타내었다. 따라서 본 연구 결과에 따라 복숭아 유과 씨는 항노화, 미백, 주름방지로 화장품 산업에서 천연 물질로 잠재적인 기능성을 가지고 있을 것으로 사료된다.

• 한국작물학회지
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• 제60권4호
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• pp.436-441
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• 2015

전통적인 교배육종을 통하여 총 폴리페놀 함량을 높인 슈퍼홍미(흑진주벼/수원 425호//대립벼 1호)벼 품종(품종출원 2015-339호)의 작물학적 특성과 품질특성을 조사 분석한 결과를 요약하면 다음과 같다. 슈퍼홍미벼 품종의 평균출수기는 9월 5일로 만생종이며, 간장은 94.7 cm 정도이며 임실률은 81.7%였다. 또한 현미천립 중은 26.8 g 정도로 슈퍼자미(26.2 g)보다 무거운 품종이다. 슈퍼홍미벼 품종은 다른 유색미 품종보다 기름함량과 단백질 함량이 낮았다. 그리고 불포화지방산인 올레산, 리놀레산 함량이 높았다. 공시 유색미품종의 필수아미노산 함량은 현미 100 g 당 슈퍼홍미 6695.13 mg, 슈퍼자미 6898.28 mg으로서 비슷하였으며, 필수아미노산 중에서 슈퍼홍미 품종은 tyrosin과 arginine은 높은 것으로 평가되었다. 슈퍼홍미벼 품종의 총 폴리페놀함량은 248.31 mg으로서 동진벼 보다 6배, 흑진주벼 보다 2배 높았다. 플라보노이드 함량은 동진벼 보다 8배, 흑진주벼 보다 2배 높았다. 슈퍼홍미의 hydroxy radical 소거능은 동진벼 보다 높은 활성을 나타내는 것으로 확인되었다. 그러나 유색미 간의 hydroxy radical 소거능은 유의적인 차이는 보이지 않았다. 따라서, 슈퍼홍미는 식량으로서 뿐만 아니라 다양한 기능성 식품소재로서 높은 가치가 있는 것으로 기대된다.

• 한국식품조리과학회지
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• 제27권1호
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• pp.43-54
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• 2011

Job's tears (Coixlachryma-jobi L.) and Chungkukjang (soybean-fermented food) were abundant source of phenolic compounds. In this study, almond cookies were prepared with different concentration(5%, 10%, 15%), of Job's tears Chungkukjang powder. The total phenolic contents were measured by the Folin-Ciocalteu method, total flavonoids contents were measured, and antioxidant activities were evaluated by DPPH assay. Antioxidative activity was highly correlated with the total phenolic and total flavonoids contents of Job's tears Chungkukjang almond cookies (r=0.867, r=0.647). In addition, the quality characteristics of the Job's tears Chungkukjang almond cookies were estimated based on the bulk density and pH of the dough, spread factor, color, texture profile analysis, proximate composition, and sensory evaluations. The spread factor, hardness, a value and b value, total polyphenolic contents, and DPPH free radical scavenging activity of cookies significantly increased with increasing content of Job's tears Chungkukjang powder (p<0.01), whereas the L values of the cookies decreased with the increasing Job's tears Chungkukjang powder content (p<0.05). The acceptability scores for the 5-15% Job's tears Chungkukjang almond cookie groups were ranked higher than those of the other groups in appearance, texture, and overall preference. The results of this study were shown that Job's tears Chungkukjang powder was a good ingredient for increasing the consumer acceptability and the functionality of cookies.

• Food Science and Biotechnology
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• 제16권3호
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• pp.415-420
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• 2007

The aim of this study was to determine the various bioactive components of five olive oil varieties, as well as to assess their contribution to the oxidative stability of the oils. Fatty acids, ${\alpha}$-tocopherol, ${\beta}$-carotene, total flavonoids, total phenols, and certain phenolic compounds of extra virgin olive oils (EVOO; blended, arbequina, hojiblanca, and picual) and pure olive oil (POO) were examined. Oxidation stability was evaluated by the peroxide value (POV). The total content of all the studied antioxidant compounds was significantly higher in the EVOOs than the POO (p<0.05). Among the EVOOs, picual had the highest levels of ${\alpha}$-tocopherol ($10.18{\pm}0.40\;mg/100\;g$), ${\beta}$-carotene ($557{\pm}8\;{\mu}g/100\;g$), and total phenols ($110.7{\pm}1.3\;mg/g$), which correlated strongly with antioxidative capacity. Furthermore, the lowest POV occurred in picual EVOO and correlated with the highest monounsaturated fatty acid (MUFA, C16:1 and C18:1) and lowest polyunsaturated fatty acid (PUFA, C18:2 and C18:3) compositions, suggesting the ratio of MUFA to PUFA is a critical parameter for the oxidative stability of olive oil. Our results indicate that the oxidative stability and antioxidant potential of EVOO depends not only on the antioxidant vitamins, but also on the amount of phenolic compounds and fatty acid profile of the oil.

• Advances in Traditional Medicine
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• 제4권4호
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• pp.267-273
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• 2004

Oxidative stress is associated with many kinds of chronic diseases. Antioxidants such as polyphenols are compounds that protect cells against the damaging effects of reactive oxygen species. Grape seeds are considered good resources of polyphenols, and grape seed extracts have a very strong antioxidant effect. In the present study, we established a simple gradient reverse-phase high performance liquid chromatography method to determine polyphenol content from three different grape seed resources. An ODS (2), $150\;{\times}\;3.2\;mm$ column has been employed, and six polyphenols have been determined: gallic acid, protochatechuic acid, (+)-catechin, (-)-epicatechin, procyanidin B2, and epicatechin gallate. Catechin and epicatechin were the main polyphenol compounds in all three extracts. The amount of procyanidin B2 was higher in Extract 1 (from a company of China), while Extract 2 (extracted in our lab) and Extract 3 (from a company of USA) contained higher proportions of epicatechin gallate. For the total polyphenol content, Extract 1 was much higher than that of Extract 2 and 3. The results suggest that the dietary dose of grape seed extracts from different resources should be adjusted according to polyphenol content.

• Journal of Applied Biological Chemistry
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• 제53권1호
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• pp.51-55
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• 2010

김치에서로부터 배 파쇄물에서 생육과 산 생성이 우수한 유산균을 선발하였다. 선발된 균주는 Ln. mesenteroides로 동정되었으며, 국립농업과학원 농업유전자원센터에 KACC 91495P로 기탁하였다. KACC 91495P 균주를 배 파쇄물에 접종한 후 pH, 적정산도, 생균수의 변화를 경시적으로 분석하였다. 배양액의 pH는 배양 9시간 이후 pH 4.05로 급격히 감소한 후 배양 18시간에 pH 3.86까지 완만하게 감소하였다. 적정산도는 배양 초기부터 15시간까지 지속적으로 증가하여 1.09% 수준에서 평형을 이루었다. 생균수는 접종 후 9시간까지 급격히 증가하고 그 이후 완만하게 증가하여 배양 18시간에는 $2.9{\times}10^9\;CFU/g$까지 증가하였다. 유기산 농도는 배양시간에 비례하여 증가하여 18시간 배양 후 젖산이 0.213%, 초산이 0.259%, 사과산이 0.217%로 분석되었다. 또한 배 발효액의 총 폴리페놀 함량은 9시간 배양 후 $134\;{\mu}g$ tannic acid/mL에서 $185\;{\mu}g$ tannic acid/mL로 약 40% 증가하였으며 따라서 DPPH radical 소거활성도 향상되었다. 또한 $4^{\circ}C$에서 KACC 91495P 균주에 의한 배 발효물은 약 2주일의 저장기간 동안 pH, 적정산도, 총균수의 변화는 미미하였다.

• 한국축산식품학회지
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• 제40권4호
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• pp.613-627
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• 2020

Paprika is known to contain polyphenolic compounds that have good antioxidant properties. This study was conducted to investigate the benefits of adding paprika juice of different colors to yogurt and to determine how paprika affects the quality characteristics of yogurt. Stirred yogurt samples supplemented with different levels of red, orange, or yellow paprika juice were inoculated with mixes of Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus. Paprika addition decreased the pH but increased titratable acidity, lactic acid bacteria (LAB) counts, total polyphenol content (TPC), levels of vitamin A and C, and antioxidant activity. Proteolysis and viscosity of paprika-containing yogurts were significantly higher than those of the control yogurt without paprika juice (p<0.05). In particular, the viscosity of red paprika yogurt was significantly higher than that of yogurts containing 5% orange and yellow paprika juices (each p<0.05). The antioxidant activity of the methanol extract of the yogurt containing 2.5% orange paprika juice was the highest. Storage at 4℃ for 15 days only slightly altered LAB counts, antioxidant activity, and TPC of paprika yogurt. These results indicate that paprika could be used as a natural food additive for the development of functional yogurts.

• 한국식품영양학회지
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• 제29권3호
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• pp.347-356
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• 2016

This study analyzed the antioxidant properties of Equisetum arvense and its effects on serum factor levels in mice fed a high-fat diet. The aim was to establish a new effective resource for biologically active materials. E. arvense stem and root extracts were obtained using deionized water at $95^{\circ}C$, and 70.5% ethanol at $85^{\circ}C$. These extracts were used to analyze the total phenolic compounds and antioxidant (ABTS, DDPH, and FRAP) activities. The effects of prepared ground samples were evaluated by feeding them to mice. E. arvense extracts showed strong antioxidant effects. The caffeic acid content was highest in the 70.5% ethanol extract of the vegetative stem, as determined by high-performance liquid chromatography. The blood concentrations of insulin and leptin were significantly lower in mice fed a high-fat diet supplemented with extracts of the root, reproductive stem, and vegetative stem of E. arvense than in mice fed only a high-fat diet. These results suggest that the polyphenolic compounds in E. arvense extracts exert various antioxidant effects. The stems and root of E. arvense can lower the blood levels of insulin and leptin, even after consumption of a high-fat diet.

• 한국축산식품학회지
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• 제38권6호
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• pp.1196-1202
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• 2018

The objective of this study was to determine the antioxidant activity of gamma-irradiated Asparagus cochinchinensis (Asparagi radix) (Lour.) Merr. Extract (ARE) and its inhibition effect on food lipid oxidation using emulsion-type pork sausage as a model. ARE was prepared from dried Asparagi radix root and ARE solution (1.0 g/mL) was gamma-irradiated with designated doses at 5, 10, and 20 kGy. Antioxidant activity of ARE solution was determined by measuring 1,1-diphenyl-e-picrylhydrazyl (DPPH) and 2,2'-azino-bis (3-ethylbenzothiazoline-9-sulphonic acid) (ABTS) radicals. Activities of DPPH and ABTS radicals were decreased, whereas total phenolic contents increased after gamma irradiation with a dose dependence. Addition of gamma-irradiated ARE dose-dependently retarded lipid oxidation of emulsion-type pork sausage during storage at $4^{\circ}C$. These results indicated that gamma-irradiated ARE might have antioxidant activity more than non-irradiated ARE due to increase of the content of polyphenolic compounds by ionizing radiation.

• International Journal of Industrial Entomology and Biomaterials
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• 제44권1호
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• pp.21-27
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• 2022

Different parts of the mulberry plant are described to be potential sources of polyphenolics exhibiting strong antioxidant activity. In this study, we prepared various aqueous extracts of mulberry root bark by subjecting to steam at different temperatures and time intervals (45℃, 15 h; 70℃, 15 h; 95℃, 6 h and 95℃, 15 h) followed by extracting at 80℃ for 1 h. The total polyphenolic content ranged from 66.82-101.20 mg gallic acid equivalent (GE)/g of extract whereas the flavonoids were in the range of 13.03-25.23 mg catechin equivalent (CE)/g of extract. The extracts also exhibited strong antioxidant activities (0.99-1.66 mg trolox equivalent (TE)/g of extract in DDPH assay and 10.65-16.26 mg TE/g of extract in ABTS assay). This study clearly showed an improvement in the antioxidant activity of the water extract of mulberry root bark by the steam treatment, which can be used as a tea or health-promoting materials.