• Journal of the Korean Society of Food Science and Nutrition
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• v.45 no.11
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• pp.1691-1695
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• 2016

The objective of this study was to determine the antioxidant activities of rice bran extracts by three different extraction methods. Rice bran was extracted by solvent extraction, saponification extraction, and supercritical fluid extraction. The antioxidant activities of the rice bran extracts were determined based on ABTS and DPPH radical scavenging activities, reducing power, and lipid peroxidation inhibitory activity. The unsaponifiable matter (USM) extracted by the saponification method showed higher ABTS (671.7 mg Trolox equivalent antioxidant capacity (TEAC)/g) and DPPH (330.7 mg TEAC/g) radical scavenging activities as well as reducing power ($A_{700}=1.14$) than those of the solvent extract (ME) and supercritical fluid extract (SFE). Inhibitory effect on lipid peroxidation was higher in USM (68.7%) and SFE (75.4%) compared to ME (47.8%). USM indicated relatively higher antioxidant activities compared with those of SFE and ME. These results show that the saponification method for extraction of USM from rice bran extracted was the most effective method for enhancement of antioxidant activity. In addition, these extracts from rice bran could be used as functional ingredients in the food industry.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.1014-1016
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• 2010

우리나라 쌀 생산량은 해마다 증가되고 있으나, 1인당 쌀 소비량은 급격히 감소되고 있는 수급 불균형을 이루고 있다. 특히 충청남도는 최근 6년간 전국 쌀 생산량 1위를 차지해 오고 있어서 쌀 소비의 확대방안이 더욱 절실히 요구되고 있는 지역적 특성을 지니고 있다. 취반용 쌀 소비량 확대만으로는 쌀 소비량 증대에 한계점이 있으므로, 소비자의 요구에 맞는 고 기능성, 간편식으로 다양한 기호성을 지닌 쌀 가공식품 형태의 개발이 필요하게 되었다. 이러한 요구에 적합한 제품개발로 쌀을 이용한 쌀국수를 개발하고자 하였으며, 이러한 쌀국수 제품개발은 쌀을 이용한 제품개발은 또다른 시도가 되어 쌀 소비촉진이 향상될 것으로 기대된다. 기능성 쌀국수 개발을 위하여 천연물 중 연잎 소재를 첨가하였다. 연잎은 차와 사찰음식을 대표하는 소재중 하나이다. 연잎에는 비타민 C와 섬유소가 매우 풍부하다. 이러한 성분은 미용식품으로써의 응용이 가능하며, 식이 섬유소는 배변작용에도 도움이 될 수 있다. 또한 항산화제인 quercetin이 다량 함유되어 있다. 이 quercetin은 플라보이드 배당체이며, 우리 몸의 세포의 노화를 유발하는 유해 활성 산소를 제거하는 기능을 가지고 있다. 따라서 이러한 유해 활성산소를 억제하는 것이 항산화 활성이 높은 연잎을 이용하여 고 기능성 쌀가공품 제품 개발이 가능할 것으로 기대한다. 쌀가루 50%를 기준으로하여 연잎가루는 3% 첨가하였으며, 전분의 종류를 달리하여 최종 제품을 개발한 결과, texture analyser로 물성을 측정한 결과 타피오카 전분과 쌀가루 혼한 쌀국수의 물성이 좋은 결과를 나타내었다. 관능검사 결과도 타피오카 전분과 쌀가루 혼합 쌀국수가 소비자들의 기호도가 높은 선호도를 나타내었고, 감자전분과 밀가루는 다소 낮은 선호도를 나타내었다. 본 연구를 기초로 하여 쌀제품 개발시 쌀의 가공적성 및 기능성 소재의 첨가 비율 확립하고, 연잎과 같은 쌀국수에 첨가 가능한 다양한 기능성 소재 발굴 및 첨가 가능성을 제시하고자 하였다.

• Journal of the Korean Applied Science and Technology
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• v.40 no.6
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• pp.1557-1566
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• 2023

Agastachis herba is so similar in use to herbs that it is called Korea Mint in the West. Western herbs are commonly used as ingredients in cosmetics. However, in Korea, Agastachis herba is primarily used as a medicinal herb. This study aims to compare the effectiveness of one cosmetic ingredient with another cosmetic ingredient. Antioxidant, whitening, polyphenol, flavonoid, and antibacterial experiments were conducted on lactobacillus, yeast ferments, essential oils, and floral water using extracts from Agastachis herba. Antioxidants exhibited significant effects in all samples, while essential oils displayed the highest efficacy in terms of whitening, polyphenol content, and antibacterial properties. Flavonoids exhibited the strongest effect in the 70% ethanol extract. The essential oil had the most significant functional impact. However, it was confirmed that the fermented products that underwent yeast fermentation with extracts were as effective as essential oils.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.28 no.2
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• pp.5-19
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• 2002

• Ceramist
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• v.12 no.6
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• pp.13-20
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• 2009

• Proceedings of the Korean Fiber Society Conference
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• 1999.10a
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• pp.331-334
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• 1999

• Information Display
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• v.20 no.5
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• pp.7-17
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• 2019

• Proceedings of the Korean Nutrition Society Conference
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• 2001.05a
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• pp.298.1-298
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• 2001

• Journal of the Society of Cosmetic Scientists of Korea
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• v.44 no.3
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• pp.327-334
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• 2018

Studies on seaweed-based materials have been progressing steadily day by day. In this experiment, we checked the anti-oxidant, whitening, and moisturizing activities of fermented extract from a mixture of Undariapinnatifida, Saccharina japonica, and Gloiopeltis furcate. Also, Lactobacillus sakei strains of kimchi were used as the lactic acid bacteria. The physiological status of the combined seaweed extracts was also investigated. The 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2,2'-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging results showed that the inhibitory effects of the combined seaweed extracts were higher than the positive control. Furthermore, 3,4-dihydroxy-L-phenylalanine (L-DOPA) and Mushroom tyrosinase tests were conducted during the whitening efficacy experiment. Hence, it was confirmed that the whitening activity of fermented extracts was greater than the extracts without fermentation. HPLC analysis of fucose (an active ingredient of seaweed) was also performed and a standard method for solvent conditions was newly established. This study suggests that the composite of algae extract has potentials to be used as anti-oxidant and whitening agents in cosmetics.

• Food Science and Preservation
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• v.23 no.1
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• pp.74-79
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• 2016

Eruca sativa (known as rocket plant) is a member of the Brassicaceae, which is considered an important chemo-preventive plant family. Although Eruca sativa has positive biological effects such as antioxidant and renal protective activities, the effect of the Eruca sativa extract as a therapeutic agent for skin whitening has not been reported. In this study, we investigated the applicability of the extract of Eruca sativa as a functional materials by examining the its physiological activities. The Eruca sativa extract showed low cytotoxicity against murine melanoma B16F10 cells. At concentrations (below 100 mg/L) that showed none or little cytotoxicity, the Eruca sativa extract showed high DPPH radical scavenging activity (ID50, 17.60 mg/L). In addition, the Eruca sativa extract inhibited tyrosinase activity ($ID_{50}$, 132.54 mg/L) and decreased melanin content ($ID_{50}$, 158.90 mg/L). Finally, the treatment with the Eruca sativa extract suppressed the protein expression of tyrosinase in a concentration-dependent manner. These findings suggested that the Eruca sativa extract inhibited melanin synthesis by not only suppressing intracellular tyrosinase expression but also directly inhibiting tyrosinase activity. Therefore, these results indicate that the Eruca sativa extract may be an effective material for functional cosmetics such as skin whitening materials.