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      Effects of Storage Time and Temperature on Antioxidants in Juice from Momordica charantia L. and Momordica charantia L. var. abbreviata Ser.

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          Abstract

          This study determined the antioxidant activities of juice from Momordica charantia L. (MC) and MC var. abbreviata Ser. (MCVAS) by analyzing 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging ability, ferric reducing power (FRP), and total phenolic content (TPC). The effects of storage time and storage temperature on these antioxidant activities were investigated. Liquid chromatography–mass spectrometry was conducted to identify the major components of MC and MCVAS. The results revealed that the antioxidant activity of MCVAS was better than that of MC, possibly because of richer components of MCVAS. For MC and MCVAS, the scavenging concentrations of 50% DPPH were 3.33 and 1.19 mg/mL, respectively; moreover, the FRP values were 68.93 and 118.14 mg ascorbic acid equivalent/g dry weight, respectively; and the TPC values were 8.15 and 11.47 mg gallic acid equivalent/g dry weight, respectively. The antioxidant activities of MC and MCVAS decreased with storage time. High storage temperature decreased antioxidant activity more quickly than a low temperature. In addition, MC had exhibited a faster decline in DPPH scavenging ability and FRP than MCVAS during 24-day storage, but no difference was observed in TPC.

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          Most cited references45

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          Effect of different drying methods on the product quality and bioactive polysaccharides of bitter gourd ( Momordica charantia L.) slices

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            Antioxidant, Total Phenolic Content and Cytotoxicity Evaluation of Selected Malaysian Plants

            Aqueous and ethanol extracts of different traditional Malaysian plants (Polygonum minus, Andrographis paniculata, Curcuma xanthorrhiza, Momordica charantia and Strobilanthes crispus) were evaluated for their antioxidant properties, total phenolic content and cytotoxic activity. Antioxidant activity was evaluated by using 1,1-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. The results showed that ethanol extracts contain high antioxidant activities compared to aqueous extracts. The findings exhibited a strong correlation between antioxidant activity and the total phenol contents. In addition, all the plant extracts showed non-toxic effects against a normal human lung fibroblast cell line (Hs888Lu). Although traditionally aqueous extracts are used, we determined that ethanol extracts usually achieved better activity in the assays.
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              Anti-diabetic and hypoglycaemic effects of Momordica charantia (bitter melon): a mini review.

              It has been estimated that up to one-third of patients with diabetes mellitus use some form of complementary and alternative medicine. Momordica charantia (bitter melon) is a popular fruit used for the treatment of diabetes and related conditions amongst the indigenous populations of Asia, South America, India and East Africa. Abundant pre-clinical studies have documented the anti-diabetic and hypoglycaemic effects of M. charantia through various postulated mechanisms. However, clinical trial data with human subjects are limited and flawed by poor study design and low statistical power. The present article reviews the clinical data regarding the anti-diabetic potentials of M. charantia and calls for better-designed clinical trials to further elucidate its possible therapeutic effects.
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                Author and article information

                Contributors
                Role: Academic Editor
                Role: Academic Editor
                Journal
                Molecules
                Molecules
                molecules
                Molecules
                MDPI
                1420-3049
                09 August 2020
                August 2020
                : 25
                : 16
                : 3614
                Affiliations
                [1 ]Department of Chemical Engineering, National United University, Miaoli 36063, Taiwan; linys@ 123456nuu.edu.tw (Y.-S.L.); pyho@ 123456nuu.edu.tw (P.-Y.H.); everyman2220@ 123456gmail.com (S.-Y.H.); a0979169597@ 123456gmail.com (Y.-Y.L.); mino101451@ 123456gmail.com (M.-Y.C.)
                [2 ]Ph.D. Program in Materials and Chemical Engineering, National United University, Miaoli 36063, Taiwan; wayne20410@ 123456gmail.com
                [3 ]Institute of Food Safety and Health Risk Assessment, National Yang-Ming University, Taipei 11221, Taiwan
                [4 ]Department of Applied Cosmetology, HungKuang University, Taichung 43302, Taiwan; beca690420@ 123456hk.edu.tw
                Author notes
                [* ]Correspondence: simone@ 123456nuu.edu.tw ; Tel.: +886-37-382209
                Author information
                https://orcid.org/0000-0002-9522-1812
                https://orcid.org/0000-0001-5679-993X
                Article
                molecules-25-03614
                10.3390/molecules25163614
                7464073
                32784816
                0dcc7e59-0b6f-476b-bf9c-5a9e801c4b7c
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 10 July 2020
                : 05 August 2020
                Categories
                Article

                momordica charantia l.,momordica charantia l. var. abbreviata ser.,liquid chromatography–mass spectrometry,antioxidant,storage

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