• 한국식품영양학회지
• /
• 제28권5호
• /
• pp.866-870
• /
• 2015

In this study, coffee waste was extracted with different solvents such as ethyl acetate, methylene chloride and methanol to investigate the total polyphenol contents, electron donating ability and the inhibitory effect on glutathione S-transferase. The total polyphenol contents were $3,060.61{\pm}357.12{\mu}g\;GAE/mL$ in ethyl acetate, $909.09{\pm}35.71{\mu}g\;GAE/mL$ in methylene chloride, and $1,602.27{\pm}30.36{\mu}g\;GAE/mL$ in methanol. The total polyphenol contents showed a significant difference (p<0.05) between the solvents. The electron donating ability was $80.20{\pm}1.45%$ for ethyl acetate, $81.94{\pm}0.45%$ for methylene chloride, and $85.14{\pm}1.53%$ for methanol. The electron donating abilities were significantly different (p<0.05) between the solvents. The inhibitory effect of the various extracts on glutathione S-transferase (% inhibition) was $92.12{\pm}0.56%$, $88.48{\pm}0245%$ with methylene chloride extract, and $90.85{\pm}0.14%$ with methanol extract. These too were significant different (p<0.05) between the solvents. The two portions of coffee waste extracts obtained from ethyl acetate and methanol showed meaningful results on the total polyphenol contents, and the inhibition effects on glutathione S-transferase. Therefore, they can be utilized to develop health care foods and can be applied as antioxidants for cosmeceuticals.

• 한국식품영양학회지
• /
• 제30권6호
• /
• pp.1286-1291
• /
• 2017

In this study, Pyracantha angustifolia (Franch.) C. K. Schneid was extracted with 70% methanol at room temperature for 48 hrs and concentrated under reduced pressure to measure its total polyphenol contents; furthermore, the effect of electron donating ability was examined. Methylene chloride, ethyl acetate, and methanol were used to fractionate the extract to testify total polyphenol contents, electron donating abilities, the removal abilities of superoxide radical as well as hydrogen peroxide. The total polyphenol contents were $2007.30{\pm}109.28{\mu}g\;GAE/mL$ in 70% methanol extract, $273.39{\pm}10.19{\mu}g\;GAE/mL$ in methylene chloride fraction, $80.57{\pm}0.64{\mu}g\;GAE/mL$ in ethyl acetate fraction, and $1,160.87{\pm}44.71{\mu}g\;GAE/mL$ in methanol fraction. The total polyphenol contents showed significant differences (p<0.05) between the solvents. The electron donating ability was $79.07{\pm}7.31%$ for 70% methanol extract, $22.34{\pm}0.64%$ for methylene chloride fraction, $5.33{\pm}0.28%$ for ethyl acetate fraction, and $32.26{\pm}1.10%$ for methanol fraction. The electron donating abilities were significantly different(p<0.05) between the solvents. The removal ability of superoxide radical was $0.018{\pm}0.003$ for 70% methanol extract, $0.007{\pm}0.002$ for methylene chloride fraction, $0.0147{\pm}0.003$ for ethyl acetate fraction, and nothing for methanol fraction. The measurement of hydrogen peroxide decomposition was $0.022{\pm}0.0046$ for 70% methanol extract, $0.0027{\pm}0.0015$ for methylene chloride fraction, $0.0037{\pm}0.0012$ for ethyl acetate fraction, and $0.0009{\pm}0.0001$ for methanol fraction.

• 한국응용과학기술학회지
• /
• 제33권4호
• /
• pp.693-697
• /
• 2016

본 연구는 추출물 농도에 따른 생리활성물질의 용출량을 측정하기 위해 전자공여능과 총 폴리페놀 함량을 측정한 결과이다. 전자공여능은 추출물의 첨가 농도가 15%인 경우는 21.81%로 나타났고, 35% 농도에서 40.45%로 가장 높았다. 한약재의 첨가 농도가 증가함에 따라 전자공여능은 유의적으로 증가하였다(p<0.05). 가장 높은 35% 첨가 농도에서의 40.45% 공여능은 이보다 더 낮았으므로 전자공여능은 미약한 것으로 생각된다. 총 폴리페놀함량은 한방약술 15%에서는 $113.89{\pm}1.79{\mu}g\;GAE/m{\ell}$로 나타났고, 한방약술 35% 에서는 $274.24{\pm}0.71{\mu}g\;GAE/m{\ell}$로 나타나서 첨가물의 농도 증가에 따라 총 폴리페놀의 함량도 유의적으로 증가하였다(p<0.05). 추출물 농도가 30%에서 총 폴리페놀 함량의 증가 폭이 $61.75{\mu}g\;GAE/m{\ell}$로 가장 높았다.

• 한국식품영양학회지
• /
• 제33권5호
• /
• pp.561-569
• /
• 2020

In this study, the antioxidative activity of Jeolpyun containing S. glauca (Bunge) Bunge powder (2%, 4%, 6%, and 8%) and extract (2%, 4%, 6%, and 8%) was evaluated based on the total polyphenol contents, electron-donating ability, scavenging of superoxide anion radical, and decomposition of hydrogen peroxide. Total polyphenol contents of Jeolpyun containing 8% S. glauca (Bunge) Bunge powder were the highest with a value of 2,280±0.00 ㎍ GAE/mL. It was observed that total polyphenol content exhibited a significant relation with concentrations at p<0.05. The electron-donating ability of Jeolpyun containing 8% S. glauca (Bunge) Bunge extract was the highest with a value of 83.93±0.69%. The electron-donating abilities revealed significant differences between concentrations (p<0.05). The superoxide radical scavenging ability of the blank was 0.01523±0.00068 and Jeolpyun containing 6% S. glauca (Bunge) Bunge powder was the highest with a value of 0.00977±0.00842. The hydrogen peroxide decomposing ability of Jeolpyun containing 0% S. glauca (Bunge) Bunge powder was -0.00377±0.0049; 8% S. glauca (Bunge) Bunge powder revealed the highest decomposing ability of -0.0476±0.0234. Hydrogen peroxide decomposing abilities revealed significant differences between concentrations (p<0.05). Jeolpyun containing S. glauca (Bunge) Bunge powder and extract demonstrated improved antioxidative activities.

• 한국식품영양학회지
• /
• 제31권4호
• /
• pp.543-548
• /
• 2018

This study was conducted to investigated the antioxidant activities of extract for Megmoondong fruit. Liriope platyphylla L. was extracted with 70% methanol at room temperature for 48 hr and concentrated under reduced pressure to measure its total polyphenol contents and electron donating ability. The total polyphenol contents were $7,253.50{\pm}335.43{\mu}g\;GAE/mL$ in 70% methanol extract, $1,239.77{\pm}9.30{\mu}g\;GAE/mL$ in methylene chloride fraction, $919.30{\pm}50.83{\mu}g\;GAE/mL$ in methanol fraction, $105.44{\pm}2.04{\mu}g\;GAE/mL$ in ethyl acetate fraction. The total polyphenol contents showed significant differences (p<0.05) between the solvents. The electron donating ability was $69.17{\pm}12.61%$ for 70% methanol extract, $33.11{\pm}1.77%$ for methylene chloride fraction, $5.19{\pm}2.59%$ for ethyl acetate fraction, and $20.16{\pm}1.04%$ for methanol fraction. The electron donating abilities were significantly different (p<0.05) between the solvents. The removal ability of superoxide radical was $0.0174{\pm}0.0007$ for 70% methanol extract, $0.0164{\pm}0.0007$ for methylene chloride fraction, $0.0172{\pm}0.0007$ for ethyl acetate fraction, and nothing for methanol fraction. The measurement of hydrogen peroxide decomposition was $0.0985{\pm}0.1021$ for 70% methanol extract, $0.0896{\pm}0.0893$ for methylene chloride fraction, $0.0115{\pm}0.0085$ for ethyl acetate fraction, and $0.0170{\pm}0.0180$ for methanol fraction. The Liriope platyphylla L. extracts obtained from methylene chloride showed significantly relevant results in the total polyphenol contents and electron donating ability, which was higher than the original extract.

• 한국약용작물학회지
• /
• 제16권5호
• /
• pp.306-312
• /
• 2008

시험장에서 육성한 품종인 명안, 불로, 청대, 장명, 청운과 육성중인 청양6호, 청양7호 및 청양재래의 가용성 무질소물, 조단백질, 조지질, 회분, 총 폴리페놀, 엑스, 베타인의 함량을 8, 9, 10 및 11월의 수확시기별로 조사한 결과, 가용성 무질소물 및 엑스는 육성중인 청양6호가 가장 높은 함량을 보였고, 조단백질, 총폴리페놀 및 베타인의 함량에서는 육성중인 청양 7호가 가장 높은 함량을 보였으며, 조지질은 청대에서, 조회분은 청운에서 가장 높았다. 건과비율은 육성중인 청양6호에서 가장 높았고, 건과비율이 높을수록 가용성 무질소물의 함량은 증가 (r = 0.70)하는 반면 조단백질 (r = -0.83) 및 조회분 (r = -0.71)등은 감소하였다. 일반성분 중에는 서로 일정한 상관을 보였는데, 가용성 무질소물의 함량이 증가하면 엑스의 함량 (r = 0.81)은 높아지는 반면, 단백질 (r = -0.88), 지질 (r = -0.82) 및 회분 함량 (r = -0.81)은 감소하고, 총폴리페놀 함량이 증가하면 베타인 함량이 증가 (r = 0.90)하는 경향이었다. 품종특성과 성분을 분석한 결과 육성중인 청양 6호는 가용성 무질소물 및 엑스분이 높게 관찰되었을 뿐만 아니라, 건과비율이 높아 타 품종에 비해 쉽게 건조될 수 있어 건조비용을 줄일 수 있는 것으로 예상되었고, 청양 7호는 조단백질, 총폴리페놀 및 베타인 함량이 높아 기능성 품종으로서의 가치를 보여주었다.

• 한국약용작물학회지
• /
• 제14권5호
• /
• pp.307-310
• /
• 2006

This study purposed to look for its uses by analyzing useful substances in kenaf (Hibiscus cannabin us L.) leaves based on the total polyphenol and flavonoid contents in the leaves, DPPH radical scavenging activity of leaf extract, SOD activity, etc. by different growth stage and variety. According to the results of experiment, the total polyphenol content was highest in Everglade-41 (27.9 mg/g dw.), the total flavonoid content was highest in Tainung-2 (42.3 mg/g dw.), and SOD activity was highest in Dowling (96.1 %). However, DPPH radical scavenging activity was similar among the three varieties.

• 한국약용작물학회지
• /
• 제17권1호
• /
• pp.21-25
• /
• 2009

The results on the useful functional compounds of kenaf (Hibiscus cannabinus L.) leaves cultivated in reclaimed lands and the biological activity effects of extracts were as follows. On 98 days after sowing (DAS) Tainung-2 showed the highest total chlorophyll content (1.68 mg/g), and on 141 DAS Dowling showed higher chlorophyll content (1.50 mg/g) than the other two did. In all cultivars the total chlorophyll content was higher on 141 DAS than on 98 DAS. Total polyphenol and total flavonoid contents were the highest in Tainung-2 (30.50 mg/g and 57.03 mg/g, respectively), and total polyphenol and total flavonoid contents (30.50 mg/g and 57.03 mg/g, respectively) were the highest in 30% ethanol extraction. Ascorbic acid contents were higher on 141 DAS than on 98 DAS in three cultivars. SOD activities of kenaf leaf extract were generally over 90%. DPPH radical scavenging activity of Tainung-2 was higher than others.

• 한국생물공학회:학술대회논문집
• /
• 한국생물공학회 2003년도 생물공학의 동향(XIII)
• /
• pp.307-312
• /
• 2003

헛개나무를 부위별 추출하여 total polyphenol과 flavonoid, Vitamin C equivalent antioxidant capacity를 연구한 결과 헛개나무의 수피와 열매에서 가장 많이 조사되었고 DPPH free radical scavenging activity에서도 수피와 열매에서 활성이 뛰어났다. 식물 추출물인 Polyphenol성 물질이 많이 존재 할 수록 항산화 활성은 뛰어났다.

• 한국식품영양과학회지
• /
• 제33권2호
• /
• pp.299-304
• /
• 2004

배로부터 polyphenol 화합물군을 분리 및 정제하여5주간 고지방식이를 한 후, 혈장 및 간장에서의 지질대사에 미치는 영향을 분석한 결과 혈장에서는 배의 polyphenol 화합물군 PR-II에서 총지질, 총콜레스테롤이 유의성 있게 감소하였다 또한 간장에서는 총지질, 중성지질이 대조군에 비해서 유의성 있는 결과가 나타났다 5주 동안 고지방 식이를 한 후 분변을 채취하여 총지질, 총콜레스테롤 및 중성지질을 측정한 결과 배에서 추출한 polyphenol화합물 군이 고지방식이만을 섭취시킨 대조군에 비해 다소 감소되는 경향을 보였다. 배의 polyphenol 화합물군을 섭취시킨 후 총단백질과 알부민 함량을 측정한 결과 대조군과 실험군에서 유의성 있는 차이는 나타나지 않았다.