Influence of extraction conditions on antioxidant activities and catechin content from bark of Ulmus pumila L.

Cho, MyoungLae; Ko, Seok-Beom; Kim, Jae-Min; Lee, Ok‐Hwan; Lee, Dae-Won; Kim, Jong Yea

doi:10.1007/s13765-016-0165-8

Cited by 19 publications

(13 citation statements)

References 33 publications

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“…Results of AOX revealed the high antioxidant activity in extract obtained from EAE (Table 4). This is in agreement with the higher TPC of EAE and confirms the usual correlation between AOX and TPC (Cho et al 2016). Moreover, the high antioxidant activity of EAE irrespective of its low individual phenolic compounds further confirms the modification of phenolics to more potent antioxidants i.e.…”

Section: Antioxidant Activity (Aox)supporting

confidence: 87%

Optimization and comparison of non-conventional extraction technologies for Citrus paradisi L. peels: a valorization approach

et al. 2019

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The phenolics from grapefruit peel were obtained by ultrasound assisted extraction (UAE) and enzyme-assisted extraction (EAE). Extraction parameters were optimized using response surface methodology to maximize the yield of total phenolic content (TPC) and total flavonoid content (TFC). The optimized extracts from UAE and EAE were then compared with conventional solvent extraction for their TPC, TFC, antioxidant activity and phenolic composition. The best optimized conditions for UAE was obtained at 33.12 min extraction time, 71.11% amplitude and a solvent-solid (SS) ratio of 39.63 mL/g. The optimized parameters for EAE were 4.81 h extraction time, 0.9% enzyme concentration and 40 mL/g SS ratio. Similar values of experimental and predicted TPC and TFC at optimized conditions indicates the suitability of the quadratic model in optimizing the extraction parameters. Further characterization of extracts suggested EAE as most efficient process in extracting bioactive compounds.

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Section: Antioxidant Activity (Aox)supporting

confidence: 87%

Optimization and comparison of non-conventional extraction technologies for Citrus paradisi L. peels: a valorization approach

et al. 2019

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“…The antioxidant activity of citrus corresponds to different water and fat soluble vitamins, minerals, polyphenolic compounds, pigments, and other compounds (Zhou, ). Results of the study showed highest AOX activity of EAE extract (Table ) which is in correlation with the results of the TPC and HPLC, depicting a direct relation of TPC and AOX activities (Anagnostopoulou, Kefalas, Papageorgiou, Assimopoulou, & Boskou, ; Cho et al, ). Furthermore, previous studies of Rice‐Evans et al (); Di‐Majo et al () and Plaza et al () suggested the mechanism of decrease in AOX activity with glycosylation under the ultrasonic and enzymatic processing conditions.…”

Section: Resultssupporting

confidence: 81%

“…which is in correlation with the results of the TPC and HPLC, depicting a direct relation of TPC and AOX activities(Anagnostopoulou, Kefalas, Papageorgiou, Assimopoulou, & Boskou, 2006;Cho et al, 2016). Furthermore, previous studies ofRice-Evans et al (1996); Di-Majo et al (2005) andPlaza et al (2014) suggested the mechanism of decrease in AOX activity with glycosylation under the ultrasonic and enzymatic processing conditions.…”

supporting

confidence: 86%

Enzyme‐ and ultrasound‐assisted extractions of polyphenols from Citrus sinensis (cv. Malta) peel: A comparative study

Nishad

Saha

Kaur

2019

J Food Process Preserv

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Response surface methodology (RSM) was employed for optimization of ultrasound‐assisted extraction (UAE) and enzyme‐assisted extraction (EAE) of bioactives from Citrus sinensis cv. Malta peel. The optimized extract was further compared with conventional solvent extraction for total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity (AOX). The optimized condition for UAE was obtained at 70.89% amplitude, 40 ml/g solvent–solid (SS) ratio, and an extraction time of 35 min. Moreover, the optimized condition for EAE was 0.84% enzyme concentration, 30.94 ml/g SS ratio and 4.87 hr extraction time. The predicted TPC and TFC recoveries under the optimized conditions were significantly similar to the experimental values, indicating suitability of the employed RSM model. Phenolic profiling through HPLC confirmed the effect of extraction methods on released phenolics and AOX. EAE enhanced twofold higher yield of phenolics than UAE. Thus, it seems EAE has significant industrial implications in valorization of the waste from horticultural produce. Practical applications In the present research, we have optimized the process for extraction of bioactives using enzyme‐ and ultrasound‐assisted methods from citrus peel. Based on high recovery of phenolics and antioxidant activity, enzyme‐assisted process was found to be more efficient than ultrasound. Results suggest that enzyme‐assisted extraction process may have promising applications for processing of industrial byproducts and reducing environmental waste.

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“…We performed a DPPH (α,α-Diphenyl-β-picrylhydrazyl) assay as described previously with some modifications [17]. First, 0.8 mL of 0.4 mM DPPH solution was added to 0.2 mL of the sample, and the mixture was incubated in the dark for 10 min.…”

Section: Methodsmentioning

confidence: 99%

Anti-Obesity Effect of Extract from Nelumbo Nucifera L., Morus Alba L., and Raphanus Sativus Mixture in 3T3-L1 Adipocytes and C57BL/6J Obese Mice

Sim

Choi

Cho

et al. 2019

Foods

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The antioxidant and anti-adipogenic activities of a mixture of Nelumbo nucifera L., Morus alba L., and Raphanus sativus were investigated and their anti-obesity activities were established in vitro and in vivo. Among the 26 different mixtures of extraction solvent and mixture ratios, ethanol extract mixture no. 1 (EM01) showed the highest antioxidant (α,α-Diphenyl-β-picrylhydrazyl, total phenolic contents) and anti-adipogenic (Oil-Red O staining) activities. EM01 inhibited lipid accumulation in 3T3-L1 adipocytes compared to quercetin-3-O-glucuronide. Furthermore, body, liver, and adipose tissue weights decreased in the high-fat diet (HFD)-EM01 group compared to in the high-fat diet control group (HFD-CTL). EM01 lowered blood glucose levels elevated by the HFD. Lipid profiles were improved following EM01 treatment. Serum adiponectin significantly increased, while leptin, insulin growth factor-1, non-esterified fatty acid, and glucose significantly decreased in the HFD-EM01 group. Adipogenesis and lipogenesis-related genes were suppressed, while fat oxidation-related genes increased following EM01 administration. Thus, EM01 may be a natural anti-obesity agent.

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Influence of extraction conditions on antioxidant activities and catechin content from bark of Ulmus pumila L.

Cited by 19 publications

References 33 publications

Optimization and comparison of non-conventional extraction technologies for Citrus paradisi L. peels: a valorization approach

Optimization and comparison of non-conventional extraction technologies for Citrus paradisi L. peels: a valorization approach

Enzyme‐ and ultrasound‐assisted extractions of polyphenols from Citrus sinensis (cv. Malta) peel: A comparative study

Anti-Obesity Effect of Extract from Nelumbo Nucifera L., Morus Alba L., and Raphanus Sativus Mixture in 3T3-L1 Adipocytes and C57BL/6J Obese Mice

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