• 대한한의학방제학회지
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• 제32권3호
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• pp.235-245
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• 2024

Objective : The study's objective is to assess the components of Dendropanax morbifera (DM) utilizing UPLC-MS/MS and assess their antioxidant properties in order to establish fundamental information for quality control of herbal formulations. Methods : The DM leaves were ground into powder and extracted with water at 80℃. The extract was subsequently concentrated and subjected to freeze-drying for subsequent analysis. The LC-MS/MS analysis was performed using a 1260 series HPLC system and a 3200 QTrap tandem mass system in positive ion mode, with detection conducted at 280 nm. The Folin-Ciocalteu method was employed to measure the phenolic content, while a colorimetric method using aluminum chloride was used to determine the flavonoid content, with gallic acid and quercetin as standards, respectively. The evaluation of antioxidant activity was conducted through the measurement of DPPH radical scavenging activity, by adding the DPPH solution to the extract and recording the absorbance at 517 nm. Results : The UPLC-MS/MS analysis identified five polyphenolic compounds in the DM extract, specifically syringin, 6-hydroxyluteolin 7-O-laminaribioside, shaftoside, rutin, and kaempferol-3-O-rutinoside. The extract was found to contain a total phenolic content of 83.106 ± 0.21 mg GAE/g and a total flavonoid content of 87.963 ± 1.014 mg QE/g. The DM extract demonstrated substantial antioxidant properties, resulting in a reduction of DPPH radicals that was evident at concentrations as low as 40 ㎍/㎖. Conclusions : The study determined important polyphenolic compounds in DM and established its considerable antioxidant efficacy. These findings provide evidence for the efficacy of DM in disease prevention related to oxidative stress and establish a foundation for ensuring quality control in herbal preparations.

• 생물환경조절학회지
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• 제24권1호
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• pp.21-26
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• 2015

새로운 농가 소득 작물로서 곰취 신품종 육성을 위한 기초자료를 얻기 위하여, 두 곰취(적곰취와 달곰)와 기존 재배종 곰취에 대한 향기 성분과 총페놀함량, DPPH 활성, 비타민 C 함량을 분석하였다. 생체중 100g 당 총페놀함량은 재배종(137.29mg) 보다 적곰취(158.40mg)와 달곰(180.82mg)에서 현저히 높았다. DPPH 활성은 재배종(74.45%)과 적곰취(75.59%)보다 달곰(86.26%)에서 다소 높았다. 비타민 C 함량은 재배종과 적곰취 보다 달곰(1.81mg)에서 다소 높았다. 향기 성분인 정유 함량은 재배종에 비하여 적곰취(0.164%), 달곰(0.290%)에서 유의하게 높았다. GC/MSD 분석의 결과 주요 물질은 재배종 곰취 43종, 적곰취 44종, 달곰 31종이 동정되었으며, N 함유 화합물은 달곰에서만 검출되었다. 향취를 나타내는 주요 6종의 향기 성분 (a-pinene, ${\beta}$-pinene, ${\beta}$-phellandrene, a-phellandrene, 3-carene, limonene) 함량은 재배종에 비하여 적곰취가 높았으며, 달곰은 상대적으로 낮았다. 특히 달곰은 총페놀함량, DPPH 활성, 비타민 C 함량, 정유함량 등에서 재배종 및 적곰취보다 유의하게 높은 것으로 나타나, 우수한 특성을 기진 것으로 판단되었다.

• Nutrition Research and Practice
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• 제5권4호
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• pp.301-307
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• 2011

The hypolipidemic and hypoglycemic effects of two dietary dosages (0.1% and 0.5%) of water and 80% ethanol extracts from hot-air dried Orostachys japonicus A. Berger were evaluated in the serum and organ tissues of streptozotocin-induced diabetic rats. The STZ-induced diabetic groups supplemented with the O. japonicus extracts showed significantly higher body weight compared to a diabetic control group at the end of experiment. The extracts exhibited substantial hypoglycemic effects by significant reductions of fasting blood glucose levels at all time points tested compared to the initial stage before treatment of the extracts. Declines of serum and hepatic triglyceride levels were greater than declines of total cholesterol in the groups treated with the 0.5% O. japonicus extract (DBW2 and DBE2) when compared to the DBC group. Hepatic glycogen content was higher in the groups treated with O. japonicus extract, while lipid peroxide content was decreased in these treated groups compared to the DBC group. Hepatic antioxidant activity was significantly increased in the groups supplemented with the O. japonicus ethanol extract The hypolipidemic and hypoglycemic effects of the O. japonicus ethanol extract were significantly greater than the effects of the water extract. Based on this study, it seems that O. japonicus ethanol extract, due to its higher phenolic and flavonoid components than the water extract, may control blood glucose and alleviate hyperlipidemia in diabetes.

• 농업과학연구
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• 제43권5호
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• pp.723-733
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• 2016

Soybeans [Glycine max (L.) Merill] are a rich source of antioxidants and other phytonutrients. Soybean sprouts contain many biologically active secondary metabolites and are rich in polyphenols, flavonoids, and phenolic compounds. In the present study, two soybean cultivars, Hosim, with high oleic acid (- 80% in total seed oil), and Pungsannamul, with normal oleic acid (- 23%) in seed, were examined for changes in the content of crude protein, crude oil, total flavonoids, total phenolics, and DPPH (1,1-diphenyl-2-picryl-hydrazyl) during the sprouting duration of 5 days. The protein content in both the varieties was found to increase by the days of sprouting. The crude oil content of Pungsannamul sprouts was found to be maximum on day 1 (16.9%, w/w) and decreased thereafter to reach to the level of 14.8% on day 5. No significant differences in the crude oil content of Hosim sprouts from day 1 to 5 were observed. Flavonoid content was found to increase up to day 4 and then dropped on day 5, in both the cultivars. Total polyphenol content showed a tendency to increase up to day 3 and started to decrease significantly from day 4. DPPH activity was found to increase up to day 5 in both the varieties. All the components studied in the high oleic acid soybean sprouts showed a change in content during the sprouting process similar to the change that would occur in normal oleic acid soybeans. The study showed that the contents of antioxidant, flavonoid, and polyphenol significantly increase during the sprouting.

• 한국식품영양학회지
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• 제33권1호
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• pp.91-97
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• 2020

The purpose of this study was to provide the basic data of butternut squash (Cucurbita moschata) according to the drying methods. The proximate composition and chromaticity of freeze-dried and hot air-dried Cucurbita moschata powders were evaluated, and the antioxidant effects of these ethanolic extracts were analyzed by DPPH, ABTS, FRAP, reducing power activity, total phenolic, and flavonoid content. As a result, Cucurbita moschata was revealed to have high carbohydrate and crude protein contents, while crude ash and crude fat contents were relatively low. Also, it was confirmed that the hot air-dried Cucurbita moschata had lower L, a, and b values than the freeze-dried Cucurbita moschata. Additionally, as a result of analyzing the antioxidant activity of Cucurbita moschata ethanolic extracts, hot air-dried Cucurbita moschata ethanolic extract showed significantly superior antioxidant activity than freeze-dried Cucurbita moschata ethanolic extract. Also, hot air-dried Cucurbita moschata ethanolic extract was revealed to have a higher polyphenol content, but slightly lower flavonoid content than freeze-dried Cucurbita moschata ethanolic extract. Based on the data from this study, further experiments on Cucurbita moschata material are necessary.

• 한국응용과학기술학회지
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• 제32권3호
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• pp.439-450
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• 2015

으름열매는 폴리페놀과 사포닌과 같은 페놀성 물질을 많이 함유하고 있다. 본 연구는 세포실험을 통해 으름열매 추출물의 항산화활성을 확인하고, 피부에 적용하였을 때 수분과 유분, 멜라닌과 홍반변화의 효과를 측정하였다. 항산화 효과 측정결과, 농도 의존적으로 폴리페놀, 플라보노이드, DPPH소거능이 상승한 것으로 확인되었고, 으름열매 추출물 크림을 사용하였을 때 수분함량 변화, 유분함량 변화, 멜라닌지수, 홍반지수의 감소가 통계적으로 유의미한 변화를 보여 으름열매 추출물 함유 화장품이 피부개선을 위한 기능성화장품으로서 활용 가능성을 확인할 수 있었다. 따라서 본 연구에서는 으름열매 추출물은 독성을 나타내지 않으면서도 피부보습, 피부개선효과를 가진 천연 및 기능성화장품 소재로서 활용 가능성이 있다고 사료된다.

• 한국수산과학회지
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• 제53권3호
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• pp.395-402
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• 2020

In recent years, the home meal replacement (HMR) market has expanded and the consumption of ready-to-heat (RTH) rice has significantly increased. In this study, RTH rice products containing seaweed were prepared with different types of grain: white rice, a mixture of white rice and barley, barley, and mixed grains. The control was a commercial RTH white rice without seaweed. The proximate components, total dietary fiber, in vitro starch digestibility, and antioxidant activity were compared. The ash content of the RTH seaweed rice was higher than that of the control (P<0.05). The total dietary fiber of the RTH seaweed rice was in the range of 1.03-6.57%, which directly impacted the in vitro starch digestibility. The in vitro antioxidant activity including total phenolic content, reducing power, DPPH (2,2-diphenyl-1-picryl-hydrazyl) and ABTS⁺ (2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid) radical scavenging activity of the seaweed rice with barley and the white rice/barley mixture was greater than that of the other rice products (P<0.05). These results indicate that the in vitro digestibility and antioxidant activity of the HMR RTH seaweed rice were greater than those of the control. In addition, when the RTH seaweed rice was prepared with barley, the functional activity improved.

• Journal of the Korean Wood Science and Technology
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• 제45권6호
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• pp.772-786
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• 2017

This study investigated the characteristics of wood tar, produced as a byproduct during the production of charcoal using oak wood by the modified traditional kiln and mechanical steel kiln. The wood tar was analyzed with a number of techniques, including Py-GC/MS, NMR, MALDI-TOF, FT-IR, TG and DSC. The Py-GC/MS analysis indicated that modified traditional kiln generated a higher hydrocarbon ratio in the wood tar than that of mechanical steel kiln. On the other hand, mechanical steel kiln resulted in a higher proportion of phenolic and aromatic hydrocarbon components than that of modified traditional kiln. Those results were also confirmed by NMR analysis. The MALDI-TOF analysis suggested that the wood tar produced in the mechanical steel kiln had a slightly higher molecular weight than the wood tar produced in the modified traditional kiln. In addition, the FT-IR analysis showed characteristic peak of symmetrical stretching vibration of $CH_3$ from the modified traditional kiln while characteristic peaks of the C-C and C-O stretching vibration were observed from the mechanical steel kiln. Moreover, TG and DSC analysis suggested that the mechanical steel kiln is more thermally stable than that of modified traditional kiln. Those findings clearly showed that the method of making charcoal greatly affects the properties of wood tar.

• 한국식품저장유통학회지
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• 제12권5호
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• pp.436-441
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• 2005

복분자의 포제에 있어 건조방법이 추출특성에 미치는 영향을 규명하기 위하여 생복분자 딸기를 5분간 증자하고, 자연 양건, 적외선 건조 또는 동결건조한 다음 20 mesh 크기로 분쇄하고, 열수나 40% 에탄올(80$^circC$)로 3시간 추출한 후 추출액의 이화학적 특성 및 항산화성을 조사하였다. 가용성 고형분과 총당의 추출수율은 동결건조품에서 가장 높았고 다음으로 적외선 건조품, 양건품 순이었으며, 건조법에 무관하게 에탄올보다는 물 추출액에서 높게 나타났다. 유기산의 추출수율과 추출액의 pH는 물 추출에서는 건조방법별 차이가 없었으나 에탄올 추출에서는 동결건조품에서 다소 높고 낮은 경향을 보였다. 총페놀의 추출수율과 추출액의 유리기 소거능은 동결 건조품, 적외선 건조품, 양건품 순이었으며, 물보다 에탄올 추출에서 높게 나타났다. 동결건조품에서 L값은 가장 높았고 a와 b값은 가장 낮았으며, 물보다 에탄올 추출에서 L과 b값은 높았으나 a값은 낮게 나타났다. 이로써 복분자 포제에 있어 전통적 자연 양건보다는 적외선 및 동결건조 특히, 동결건조의 적용에 의해 품질향상이 가능하며, 또한 총가용성 성분의 추출에는 물 추출이, 항산화성 성분의 추출에는 에탄올 추출이 유리한 것으로 확인되었다.

• 한국자원식물학회지
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• 제16권2호
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• pp.109-117
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• 2003

복분자 열매의 생리활성 효과를 알아보기 위하여 재배복분자와 야생복분자를 이용하여 실험을 수행하였다. 총페놀성 화합물 함량은 재배복분자 완숙과와 야생복분자 미숙과에서 각각 222, 190mg/g 이었고, 다당체 함량은 야생 북분자 미숙과가 320 unit로 가장 높은 함량을 나타내었다. 복분자 열매의 전자공여능은 야생복분자 미숙과가 100 $\mu\textrm{g}$/mL 농도에서 95% 이상으로 높은 활성을 보여 미숙과가 완숙과에 비해 높은 전자공여능을 갖는 것으로 나타났다. SOD 유사활성은 야생복분자 미숙과가 81%, 재배복분자 완숙과가 77%를 나타내어, 총페놀성 화합물과 같은 추세를 보였으며, 과산화지질 형성억제능은 모든 처리구에서 대조구인 $\alpha$-tocopherol과 같은 억제수준을 나타내었다 복분자 열매의 고혈압 완화효과로써 ACE 활성 저해율은 야생복분자 미숙과와 재배복분자 완숙과가 추출농도 1% 범위에서 98% 이상의 높은 ACE 활성 저해율을 보였다.