• Title/Summary/Keyword: subcritical water extract

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Antioxidant activities of phenolic compounds from Ziziphus jujuba Mill extract using subcritical water (대추 아임계수 추출물의 폴리페놀 함량 및 산화방지 평가)

  • Ko, Min-Jung;Kwon, Mi-Ri;Chung, Myong-Soo
    • Korean Journal of Food Science and Technology
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    • v.53 no.3
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    • pp.329-333
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    • 2021
  • Subcritical water extraction (SWE) is an eco-friendly extraction method that uses only purified water as a solvent under high temperature and high pressure conditions. In this study, total phenolics, and antioxidant activity were evaluated in Ziziphus jujuba Mill extracts from subcritical water obtained by varying the extraction temperature (110-190℃) and extraction time (1-20 min). Total phenolics was maximized with extraction at 190℃ for 15 min (67.79±3.45 mg gallic acid equivalent/g jujube). The 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity (48.84±4.74%) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) free radical scavenging activity (84.75±1.15%) were maximal at extraction conditions of 190℃, for 20 min. All jujube extracts prepared using SWE had higher total phenolics and antioxidant activities than extracts prepared using organic solvent extraction (60℃, 120 min), including methanol and ethanol. SWE could be an excellent alternative to organic solvents for extracting phenolics and antioxidant compounds.

Effect of Extraction Methods on Flavoring Compounds and Antioxidant Activity of Extracts from Cinnamon (Cinnamomum cassia Blume) (추출방법이 육계피 추출물의 향기 성분과 항산화 활성에 미치는 영향)

  • Cha, Jaeyoon;Kim, Chong-Tai;Cho, Yong-Jin
    • Food Engineering Progress
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    • v.22 no.4
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    • pp.304-308
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    • 2018
  • The interest in and development of healthy foods and nutraceuticals have increased because of the trend for a health-oriented society. Cinnamon is used as a food ingredient as well as a herbal medicine because of its functional properties. In this study, flavoring compounds and antioxidative activities of cinnamon extracts were investigated with different extraction solvents and extraction methods. The contents of flavoring compounds such as coumarin, cinnamic acid, cinnamaldehyde, and cinnamyl alcohol were investigated. The contents of courmarin, cinnamic acid, and cinnamylaldehyde in 70% ethanol extract were higher than those in hot water and subcritical water extracts. The contents of courmarin, cinnamic acid, and cinnamaldehyde in subcritical water extract were higher than those in hot water extract, whereas the content of cinnamyl alcohol was lower. DPPH scavenging activity increased with increasing concentration of the extracts, and the 70% ethanol extract showed the highest antioxidant activity. The ascorbic acid content of the 70% ethanol extract was largest in the antioxidative activity measurement by FRAP analysis. The ascorbic acid contents of the hot water and subcritical water extracts were similar.

Antioxidant activities of phenolic compounds from Angelica gigas Nakai extract using subcritical water (아임계수 추출 기술을 이용한 당귀 추출물의 유효성분 및 산화방지 평가)

  • Ko, Min-Jung;Lee, Jeong-Hyun;Nam, Hwa-Hyun;Chung, Myong-Soo
    • Korean Journal of Food Science and Technology
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    • v.49 no.1
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    • pp.44-49
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    • 2017
  • Subcritical water extraction can be used to selectively extraction compounds by varying the temperature-dependent dielectric constant of water. This study investigated subcritical water extraction of decursin and nodakenin yields from Angelica gigas Nakai (AN) quantitatively and qualitatively by HPLC, and HPLC-ESI/MS. Total phenolics, total flavonoid contents, and antioxidant activity were determined by DPPH and ABTS radical scavenging activity, including the effects of varying the extraction conditions of temperature ($110-200^{\circ}C$) and time (1-20 min) under high pressure (10 MPa). By subcritical water extraction under operating conditions of $120-130^{\circ}C$, the maximum yields of decursin ($6.64{\pm}0.42%$ in the dried material) and nodakenin ($3.71{\pm}0.28%$ in the dried material) were obtained. From $190-200^{\circ}C$ the maximum yields of total phenolics ($75.97{\pm}1.64mg$ gallic acid equivalent/g AN), flavonoids ($8.56{\pm}1.10mg$ quercetin equivalent/g AN), DPPH ($63.07{\pm}1.71%$), and ABTS ($72.32{\pm}2.82%$) were obtained.

Protective effect of Capsosiphon fulvescens on oxidative stress-stimulated neurodegenerative dysfunction of PC12 cells and zebrafish larva models

  • Laxmi Sen Thakuri;Jung Eun Kim;Jin Yeong Choi;Dong Young Rhyu
    • Fisheries and Aquatic Sciences
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    • v.26 no.1
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    • pp.24-34
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    • 2023
  • Reactive oxygen species (ROS) at high concentrations induce oxidative stress, an imbalanced redox state that is a prevalent cause of neurodegenerative disorders. This study aimed to investigate the protective effect of Capsosiphon fulvescens (CF) extract on oxidative stress-induced impairment of cognitive function in models of neurodegenerative diseases. CF was extracted with subcritical water and several solvents and H2O2 (0.25 mM) or aluminum chloride (AlCl3; 25 µM) as an inducer of ROS was treated in PC12 neuronal cells and zebrafish larvae. All statistical analyses were performed using one-way analysis of variance and Dunnett's test using GraphPad Prism. H2O2 and AlCl3 were found to significantly induce ROS production in PC12 neuronal cells and zebrafish larvae. In addition, they strongly affected intracellular Ca2+ levels, antioxidant enzyme activity, brain-derived neurotrophic factor (BDNF) and tropomyosin receptor kinase B (TrkB) signaling, acetylcholinesterase (AChE) activity, and hallmarks of Alzheimer's disease. However, treatment of H2O2-induced PC12 cells or AlCl3-induced zebrafish larvae with CF subcritical water extract at 90℃ and CF water extract effectively regulated excessive ROS production, intracellular Ca2+ levels, and mRNA expression of superoxide dismutase, glutathione peroxide, glycogen synthase kinase-3 beta, β-amyloid, tau, AChE, BDNF, and TrkB. Our study suggested that CF extracts can be a potential source of nutraceuticals that can improve the impairment of cognitive function and synaptic plasticity by regulating ROS generation in neurodegenerative diseases.

Antioxidant and Acetylcholinesterase Inhibitory Activities of Subcritical Water Extracts from Houttuynia cordata Thunb (어성초의 아임계수 추출물의 항산화 활성 및 Acetylcholinesterase 저해 활성)

  • Jo, Eun-Kyung;Lee, Seung-Cheol
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.10
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    • pp.1391-1396
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    • 2011
  • Houttuynia cordata Thunb powder (0.05 g) was placed in a stainless vessel containing 10 mL of water, and subcritical water (SCW) extraction was carried out at various temperatures (50, 100, 200, and $300^{\circ}C$) for 10, 30, and 60 min. SCW treatment significantly affected physiologically important compounds, antioxidant activity, and acetylcholinesterase inhibitory activity of H. cordata Thunb extracts. H. cordata Thunb extracted at $300^{\circ}C$ for 30 min had the highest quercetin content, DPPH radical scavenging activity, total phenolic content, and acetylcholinesterase inhibitory activity, whereas the extract at $100^{\circ}C$ for 10 min possessed the highest flavonoid content. The highest ABTS radical scavenging activity was found in H. cordata Thunb extracted at 200 and $300^{\circ}C$ for 60 min. These results indicate that SCW extraction might be a useful processing method for obtaining valuable materials from H. cordata Thunb.

Effective Component Contents and Antioxidative Activities of Unripe Apple by Extraction Methods (추출방법에 따른 미숙사과 추출물의 유용성분 함량 및 항산화 활성)

  • Hong, Jeong Jin;Seol, Hui Gyeong;Oh, Ju Youl;Jeong, Eun Ho;Chang, Young Ho
    • The Korean Journal of Food And Nutrition
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    • v.34 no.2
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    • pp.174-180
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    • 2021
  • The purpose of this study was to determine the optimum extraction method suitable for the availability of biological activities in unripe apples known to be rich in functional components. Unripe apples 'Hongro' picked on May 28th, 2019 were extracted by various extraction methods (hot water, ethanol, enzymatic pre-treatment, ultrasonic wave, and subcritical water) and their extracts were investigated yield, effective component contents, and antioxidant activities. Overall, the yields by the extraction solvent were higher in water than in organic solvent(ethanol) because water-soluble compounds were eluted from a polar solvent. Total phenol contents of the ultrasonic wave (ethanol) extracts were significantly higher in 6 times than hot water extract. Contents of flavonoid were highest in the ethanol extract at 29.14 mg QE/g. Contents of tannin and ursolic acid were also significantly higher in the ultrasonic wave (ethanol) extract. The DPPH radical and ABTS radical scavenging activities were the strongest in the ultrasonic wave (ethanol) extract. Correlation between effective components and antioxidant activities was high in the total phenol content with ABTS and the ursolic acid content with DPPH (p<0.01). The above results suggested that ultrasonic wave (ethanol) extract of unripe apples has the potential to act as a functional material.

Quantitative analysis method for zingiber officinale water extract using high-performance liquid chromatography

  • Mohd S. Md Sarip;Nik M.A. Nik Daud;Mohd A. Mohd Zainudin;Lokman H. Ibrahim;Syahrul A. Saidi;Zuhaili Idham;Adilah Anuar
    • Advances in materials Research
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    • v.13 no.3
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    • pp.233-241
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    • 2024
  • Quantitative analysis of the Zingiber Officinale sample using subcritical water extraction (SWE) was developed employing High-Performance Liquid Chromatography (HPLC) to bolster the advancement of this innovative green extraction process. This research focuses on three principal ginger bioactive compounds: 6-gingerol, 6-shagoal, and 10-gingerol. Various stages were undertaken to establish the quantitative analysis method, encompassing the optimisation of HPLC operating conditions and the formulation of standard calibration curves, yielding individual compound equations. A robust correlation within the calibration curve was achieved, exhibiting an r2 value of 0.9814 and an RSD of 5.00%. A simultaneous, swift, and dependable method was established with an injection time of 20 minutes and an 8-minute delay between injections, in contrast to the previous HPLC analysis requiring a 45-minute injection time for detecting and quantifying all components. Notably, no post-treatment was applied after the SWE process. This advancement allows for potential future online measurement of Zingiber Officinale bioactive compounds extracted using subcritical water extraction through this technology.

Characteristics of marine algae extracts using subcritical water extract method (아임계 추출법을 이용한 해조류 추출물의 특성)

  • Na, Hwan Sik;Kim, Jin Young;Park, Jong Soo;Choi, Gyeong Cheol;Yang, Soo In;Lee, Ji Heon;Cho, Jeong Young;Ma, Seung Jin
    • Food Science and Preservation
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    • v.21 no.1
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    • pp.62-68
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    • 2014
  • This study was performed in order to investigate the functional components of 5 kinds of marine algae. We have collected 5 samples of marine algae, such as the sea mustard (Undaria pinnatifida), sea tangle (Laminaria iaponice), sea weed fusiforme (Hizikia fusiforme), green laver (Entetomotpha), laver (Phophyratenera), which have been harvested in Jeollanam-do. In order to examine the functional effects, 5 kinds of marine algae were extracted with hot water ($80^{\circ}C$, 4 hr), ethanol and methanol (R.T., 4 hr), and subcritical water extract (SWE, 3 MPa, $90^{\circ}C$, $150^{\circ}C$, $210^{\circ}C$). A higher yield of extract was obtained through SWE method (3 MPa, $210^{\circ}C$) in all of the samples obtained. The highest total sugar content was 427.4 mg/g in green laver extracted with SWE (3 MPa, $210^{\circ}C$). The content of the SWE total phenolic compounds was higher than that of the water and solvent (methanol, ethanol) extracts. The anti-oxidative activities of the extracts from 5 kinds of marine algae were examined through the DPPH radical scavenging activity test. The SWE (3 MPa, $150^{\circ}C$ and $210^{\circ}C$) of the marine algae was the highest among all of the extracts. As per the results, the SWE of the marine algae contained more functional components and it had a higher antioxidant activity than those of the other extracts. The $IC_{50}$ value of tyrosinase in seaweed fusiforme and laver were higher than those of the other samples. These results strongly support the possible use of marine algae as functional materials.

Effect of Subcritical Water for the Enhanced Extraction Efficiency of Polyphenols and Flavonoids from Black Rice Bran (흑미강으로부터 유용 폴리페놀 및 플라보노이드의 추출효율 증진을 위한 아임계수의 효과)

  • Cheigh, Chan-Ick;Chung, Eun-Young;Ko, Min-Jung;Cho, Sang-Woo;Chang, Pahn-Shick;Park, Young-Seo;Lee, Kyoung-Ah;Paik, Hyun-Dong;Kim, Kee-Tae;Hong, Seok-In;Chung, Myong-Soo
    • Food Engineering Progress
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    • v.14 no.4
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    • pp.335-341
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    • 2010
  • The extraction of polyphenol and flavonoid from black rice bran was performed by diverse extraction methods using the sugar solution, ethanol, hot water ($80^{\circ}C$), and by subcritical water extraction (SWE) method. By SWE under operating conditions of $190^{\circ}C$, 1,300 psi, and 10 min, the maximum yields of total polyphenolic compounds (35.06${\pm}$1.28 mg quercetin equivalent (QE)/g dried material and flavonoids (7.08${\pm}$0.31 mg QE/g dried material) could be obtained. These results were over 11.77- and 12.21-fold higher than those of the ethanol extraction, which showed the highest extraction efficiency among tested conventional methods in total polyphenols (2.98${\pm}$0.74 mg QE/g dried material) and flavonoids (0.58${\pm}$0.21 mg QE/g dried material), respectively. Though the highest antioxidant activity (87.14${\pm}$1.14%) was observed at the dried extract obtained from ethanol method, the relative antioxidant activity per 1 g dried black rice bran by SWE ($190^{\circ}C$, 10 min) was over 11.53-fold higher than that by the ethanol extraction.