• 동의생리병리학회지
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• 제27권2호
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• pp.189-195
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• 2013

This study was designed to analyze the effects of methanol extracts and solvent fractions of the young branch of Prunus persica on scavenging activity of ROS, RNS and inhibiting activity of oxidative modification in human LDL induced by copper ion or free radical generator. The scavenging capacities of the fractions on DPPH radical, superoxide radical, nitric oxide and peroxynitrite were exhibited the highest in ethylacetate fraction, followed by butanol fraction. In the copper-induced LDL oxidative modification system, the highest antioxidant activity was revealed in ethylacetate fraction, and butanol fraction exhibited a similar activity. However, solvent fractions of the young branch of Prunus persica showed a relatively low antioxidant activity in the AAPH-mediated LDL oxidation. In addition, ethylacetate and butanol fractions also inhibited the copper-mediated LDL oxidation in the REM assay, which was comparable to that of the positive controls, including EDTA, ascorbic acid and BHT. Futhermore, a content of total phenolics in these two fractions was higher than that of the other fractions. These results indicated that ethylacetate and butanol fractions of the young branch of Prunus persica were useful for the prevention of the free radical- or metal ion-induced oxidative damages.

• 동의생리병리학회지
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• 제22권5호
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• pp.1309-1314
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• 2008

This study was undertaken to elucidate the antioxidant activity of the ethanol (EEPB) and water (WEPB) extracts of Prunus persica branches. The extracts contained a high phenolic content and revealed a potent hydrogen donating activity in DPPH scavenging assay. Compared to $\alpha$-tocopherol, EEPB (p < 0.001) and WEPB (p < 0.05) significantly inhibited $FeCl_2$-ascorbic acid-induced lipid peroxidation, and also exhibited potent antiradical activities against hydroxyl radical, superoxide anion, nitric oxide and peroxynitrite. In copper- and AAPH-mediated human low-density lipoprotein (LDL) oxidation systems, the extracts demonstrated a strong antioxidant function by metal chelating, rather than direct scavenging, action. Furthermore, EEPB at 5 ${\mu}g/mL$ concentration showed 80.77% inhibition of the electrophoretic mobility of LDL, compared to 77.69% for ascorbic acid and 76.92% for BHT. These results suggest that PB branch extracts may protect against oxidative stress-induced diseases.

• 원예과학기술지
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• 제32권4호
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• pp.421-426
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• 2014

본 연구에서는 '천중도백도' 복숭아(Prunus persica)의 고품질 다수확 생산을 하는데 적합한 결과지를 구명하기 위하 여 몇 가지 결과지 방향 및 굵기 처리에 따른 신초장, 과중, 당도 등의 변화를 조사하였다. 각 조사항목의 평균치를 보면 결과지 직경의 경우 6.9mm, 신초장은 32.6cm, 과중은 333.6g, 당도는 $11.2^{\circ}Brix$였으며, 결과지 직경과 신초장은 변이계수가 각각 35.8%와 75.3%로 높았다. 254개 결과지 및 과실 특성 중 직경 9.0mm 이하 결과지가 76.4%, 40cm이하 신초가 70.0%, 무게가 310-340g 과실이 24.8%, 그리고 당도가 $10.5-12.5^{\circ}Brix$인 과실이 66.9%를 차지하였다. 신초장은 결과지 방향에 관계없이 결과지 굵기의 영향을 크게 받았고, 과중은 결과지 방향 및 굵기의 상호작용의 영향을 크게 받았다. 그리고 당도는 결과지 방향에 관계없이 결과지 굵기의 영향을 크게 받았다. 결과지 직경과 과중간 회귀 분석 결과 하향 결과지에서는 정의 상관($r^2=0.246^{**}$)을 보였고 상향 결과지에서는 부의 상관($r^2=0.094^*$)을 보였다. 따라서 고품질 '천중도백도' 과실 생산을 위해서는 하향이 면서 직경이 9.0mm 이하인 결과지를 활용하는 것이 좋을 것으로 판단된다.