• 생명과학회지
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• 제33권7호
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• pp.549-554
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• 2023

한국 인삼은 수세기 동안 전반적인 건강 보조 식품으로 전통 한의학에 사용되어 왔다. 홍삼은 뿌리를 쪄서 건조시켜 만든다. 연질 홍삼은 새로운 가공 기술로 생산된 홍삼이다. 이 연질홍삼은 물리화학적 조성에서 생삼, 경질홍삼과 차이가 있는지 조사하였다. 인삼의 총 페놀 함량은 140℃에서 2.96 mg/g, 80℃에서 3.47 mg/g으로 평가되었다. 경질 홍삼과 연질 홍삼의 총 페놀은 160℃에서 각각 4.12 mg/g, 4.18 mg/g으로 평가되었다. 인삼, 경질 홍삼, 연질 홍삼의 총 페놀 함량은 통계적으로 유의한 차이를 보였다(p>0.05). 인삼, 경질 홍삼, 연질 홍삼의 총 플라보노이드 함량은 160℃에서 각각 2.62 mg/g, 3.97 mg/g, 3.83 mg/g으로 평가되었다. 샘플 중 연질 홍삼이 160℃로 총 산성 다당류가 가장 높았다. 두 홍삼 모두 산성 다당류 함량이 인삼보다 훨씬 높았다(49%-58%). 생삼, 경질 홍삼, 연질 홍삼에 있어 유의한 차이가 있었다(p<0.001). 연질 홍삼은 인삼보다 페놀 함량, 총 플라보노이드 함량, 총 당도 함량이 각각 25%, 49%, 45% 높았다.

• 한국약용작물학회지
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• 제15권2호
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• pp.120-127
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• 2007

The objective of this research was to evaluate the ability of water and ethanol extracts from mulberry fruit (Morus alba L.) to influence the inhibitory activity of angiotensin converting enzyme (ACE) and xanthine oxidase(XOase). The total phenol contents and sixteen phenolic compounds were investigated in water and ethanol extracts. In order to understand the factors responsible for the potent antioxidant and antihypertensive ability of mulberry, it has been evaluated for anti-oxidative activity using Fenton's reagent/ethyl linoleate system and for free radical scavenging activity using the 1,1-diphenyl-2-picryl hydrazyl free radical generating system. The total phenol contents and total of phenolic compounds in ethanol extract showed higher levels than water extract in mulberry fruit six phenolic compounds (chlorogenic acid, narigin, syringic acid, quercetin, naringenin, kampferol) has a higher individual phenolic compound content in the 60% ethanol extraction than 80% ethanol extract. The inhibitory activity on angiotensin converting enzyme (ACE) were highest in 80% ethanol extract (9.0%). Also, activity of xanthine oxidase(XOase) inhibition appeared highest in 80% ethanol extracts and correlated well with the total phenolic content, which was modulated by the concentration of individual phenolic compounds. This result revealed, that strong biological activity was caused by specific phenol compound contents. Utilization of water and ethanol extracts from mulberry fruit are expected to be good candidate for development into source of free radical scavengers and anti-hypertentive activity

• 한국식생활문화학회지
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• 제30권6호
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• pp.773-777
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• 2015

Increasing use of organically grown foods has renewed interest in the relationship between agricultural methods and food quality. The objective of this study was to evaluate the physicochemical characteristics and antioxidant activities of organic strawberries. For this study, strawberries were measured in terms of quality characteristics, including weight, length, diameter, hunter color, soluble solid contents (SSC), moisture contents, and pH, as well as antioxidant activities, including DPPH and ABTS radical scavenging activities and total phenol and flavonoid contents. Consequently, conventional strawberries showed higher weight, diameter, and L (lightness) and b (yellowness) values than organic strawberries (p<0.001). Length, moisture contents, pH, a (redness) value, and DPPH and ABTS radical scavenging activities were similar (p<0.05). However, organic strawberries showed higher SSC and total flavonoid and phenol contents than conventional strawberries (p<0.001). These results indicate that there were significant differences between organic and conventional agriculture techniques.

• 한국식품조리과학회지
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• 제12권4호
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• pp.535-540
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• 1996

감자 슬라이스를 CaCl$_2$ 용액과 chitosan 용액에 침지 하거나 혹은 이들 용액의 존재하에서 예열처리 한 후 냉장저장하여 침지 및 예열처리가 감자 슬라이스의 갈변정도, 페놀 함량, PPO 활성의 변화에 대한 영향을 조사한 결과는 다음과 같다. 1. 감자 슬라이스의 L값은 감소하는 경향을 나타내었으나, CaPS는 2주까지 L값이 증가하였고, ChPS는 4주간 L값이 증가하였다(p < 0.05). 또한 예열처리에 의 한 병용 효과에 의해 L값이 가장 증가하였다(p < 0.05). 2. CaPS를 제외한 각 처리군은 total phenol 함량이 감소하였으며(p < 0.05) 예열처 리 한 감자 슬라이스의 total phenol 함량이 더욱 감소하였다(p < 0.05). chloro-genic aicd 함량은 HCaPS를 제외하고 total phenol 함 량의 변화와 같은 경향을 나타내었다. 3. PPO 활성은 침지 및 예열처리를 통하여 감소하였는데 예열처리에 의한 감자 슬라이스의 PPO 활성 이 더욱 감소하였다 이로부터 CaCl$_2$,및 chitosan 용액에 침지 및 예열처리가 갈변억제에 효과적인 것으로 생각되어지며 L값 은 증가하고 페놀함량과 PPO 활성이 감소하였다. 이 러한 효과는 열처리군에서 더 크게 나타났다.

• 한국식생활문화학회지
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• 제30권6호
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• pp.813-817
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• 2015

Consumers have recently shown great interest in organic foods since they are considered to have higher antioxidant activity compared to conventionally farmed foods. The purpose of this study was to evaluate the general characteristics of organic and conventional spinach, such as length, weight, color, moisture contents, and antioxidant capacity based on ABTS radical scavenging activity, total phenol, and flavonoid contents. Spinach that was used in this study was grown conventionally and organically in Po-Hang, Korea. As the results, conventional spinach showed higher values for length, weight (p<0.001), and moisture content (p<0.05). For antioxidant capacity, organically grown spinach showed higher antioxidant activity than the conventional group based on total phenol and flavonoid contents, but only total flavonoid content was significantly different (p<0.05). For ABTS radical scavenging activity, the conventional group showed a slightly higher capacity, but the difference was not significant. Thus, the organic farming system in spinach showed similar or slightly higher antioxidant activities.

• 한국식품영양학회지
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• 제33권1호
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• pp.64-73
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• 2020

The purpose of this study was to investigate the antioxidant activity and β-glucan content of extracts extracted by varying the temperature at 30, 55 and 80℃ after hot air drying or freeze drying of Pleurotus ostreatus and Pleurotus eryngii. For the analysis antioxidant activity of each mushroom, β-glucan, total phenol, flavonoid contents, and DPPH·ABTS⁺·Nitrite assay were measured. Also, the β-glucan content, total flavonoid content and ABTS⁺ scavenging activity increased with freeze drying rather than hot air drying, and increased with increasing extraction temperature in both mushrooms. However, the total phenol and nitrite scavenging activity increased with hot air drying rather than freeze drying, and decreased with increasing temperature in both mushrooms. DPPH scavenging activity was not significant in both mushrooms, but decreased with increasing extraction temperature. Pearson's correlations between total flavonoid content and antioxidant activities were r=0.719~0.753 (p<0.01). As a result, the β-glucan content, total flavonoid content, and ABTS radical cation scavenging activity were highest during freeze drying and extraction at 80℃. And the highest total phenol content, DPPH radical scavenging activity and nitrite scavenging activity were obtained during hot air drying and extraction at 30℃.

• 동아시아식생활학회지
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• 제19권1호
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• pp.32-37
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• 2009

This study was carried out to gather basic data on the restoration and extent of Don tea (a coin-shaped tea), the traditional tea of Korea. We examined the physicochemical components and anti-microbial activity of Don tea extracts at 0, 5 and 10 months. The Hunter value $L^*$, of Don tea extracts which were matured for 10 months decreased from 7.01 to 4.97 compared to that when the extracts were first manufactured. However, the $b^*$ value increased from 0.09 to 2.67. There were higher contents of inorganic matter in Don tea extracts following manufacture in the order of K (14.12 mg/100 mL), Mg (0.94 mg/100 mL), P (0.88 mg/100 mL), Ca (0.16 mg/100 mL) and Mn (0.16 mg/100 mL). Classified catechins contents were found in the order of C (19.97 mg/100 mL), EGC (9.30 mg/100 mL), ECG (9.02 mg/100 mL), GCG (8.50 mg/100 mL), GC (7.61 mg/100 mL) and CG (5.63 mg/100 mL). The longer the maturation period of the Don tea extracts, the lower the contents of inorganic matter and catechins. However, this did not apply to the total phenol contents, particularly in the phenol contents of Don tea extracts matured for 10 months which increased by 93.82 mg/l00 mL. Don tea extracts which were matured for longer periods showed higher anti-microbial activities against Bacillus subtilis and Streptococcus mutans. However, there were lower activities against Staphylococcus aureus, Escherichia coli and Salmonella enteritidis. Consequently, it was concluded that a shorter maturation period was required for the effective utilization of the inorganic matter, the catechins and the gram-negative bacteria in the Don tea extracts. However, a longer maturation period of 10 months was found to effectively utilize the total phenol compound contents and the gram-positive bacteria.

• 한국식품영양과학회지
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• 제31권6호
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• pp.1150-1154
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• 2002

게르마늄을 처리하여 재배한 콩나물이 일반 콩나물과 비교하여 영양성분의 차이가 있는지를 관찰하였다. 수분함량은 일반 콩나물이 84~87.8%이었으나 게르마늄 콩나물은 88.7~90.2%로 약간 높았다. 회분 함량도 16~24%로 세 품종 모두에서 유의적으로 증가되었으나(p<0.05) 단백질의 함량은 약간 낮게 나타났다. 총 식이섬유소의 함량은 일반 콩나물과 비교하여 게르마늄 콩나물에서 7~10%높았으며 세 가지 품종모두에서 수용성 및 불용성 식이섬유소의 함량이 높게 나타났다. 총 비타민 C의 함량은 세 품종 가운데 서목태에서 가장 높았으며, 게르마늄 처리시 일반 콩나물에 비하여 17%증가되었다. 서목태에서 총 페놀 함량은 일반 수돗물이나 지하수로 재배한 콩나물과 비교하여 게르마늄 용해수로 재배한 콩나물에서 20~40%더 많이 함유되어 있었다. 콩나물에서 무기질의 함량을 측정한 결과, 재배 일수가 경 과함에 따라 대부분의 무기질 함량은 증가되었으며 특히 나트륨의 함량은 급격하게 증가되었다. 또한 일반 콩나물에 비해 게르마늄 콩나물은 칼슘과 철분의 함량이 높았으며 일반 콩나물에는 전혀 함유되어 있지 않은 게르마늄이 155ppm함유되어 있었다. 따라서 게르마늄을 처리하여 재배한 콩나물은 처리하지 않은 콩나물에 비하여 일반성분을 비롯하여 식이섬유소, 페놀화합물, 비타민 및 무기질의 함량이 높아 영양적으로 우수한 콩나물로 여겨진다.

• 한국환경과학회지
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• 제23권7호
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• pp.1233-1239
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• 2014

Watermelon (Citrullus vulgaris L.) is a summer fruit typical to help fatigue systemic absorption is getting better. The goal of this study is to screen antioxidant activity to ensure the possibility as a functional material for exocarp of watermelon. Watermelon was extracted with 70% methanol, 70% ethanol, chloroform:methanol (CM, 2:1, v/v). Total phenol contents were 12.01 mg/g, 8.89 mg/g, 3.53 mg/g in the 70% methanol, 70% ethanol, CM, in that order, respectively. Total flavonoid content, DPPH radical scavenging activity, ABTS radical scavenging activity, ferric reducing antioxidant power (FRAP), ${\beta}$-carotene bleaching assay were 70% methanol extract remarkably higher than the other extracts. And these results showed the same trend of total phenol content. From the above results shows that watermelon was effective on the antioxidative activity.

• Journal of the Korean Wood Science and Technology
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• 제47권1호
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• pp.80-89
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• 2019

Pine barks are important biomass resources because they are utilised in the production of pine wood and rosins. However, no chemical study has been conducted on the hydrophilic status of pine barks in Indonesia. This aim of this study is to explore the hydrophilic extracts of the barks from six Pinus species (P. elliotii, P. caribeae, P. oocarpa, P. merkusii P. montezumae, and P. insularis). The hydrophilics of pine barks were analysed using gas chromatography-mass spectrometry. The presence of polyphenol contents in the ethanol extracts obtained from the barks of six Pinus species was determined using the tannin-formaldehyde method, Folin-Cioucalteu assay, and vanillin-HCl assay. The ethanol and hot water soluble extractives derived from inner barks were higher in quantity when compared to those derived from the outer bark samples. The polyphenol measurement showed that the highest value of total phenol content was derived from the outer bark of P. montezumae whereas those of the total phenol and tannin- formaldehyde contents were derived from the inner and outer barks of P. oocarpa. GC-MS analysis revealed that nitrogenous compounds are dominant constituents in the inner and outer barks of the six species, followed by sugars and monophenolics, respectively.