scholarly journals Antioxidant Activity of Syzygium polyanthum Extracts

2017 ◽  
Vol 17 (1) ◽  
pp. 49 ◽  
Author(s):  
Mutia Devi Hidayati ◽  
Taslim Ersam ◽  
Kuniyoshi Shimizu ◽  
Sri Fatmawati
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Sulfonic Acid ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Dpph Assay ◽  
Abts Assay ◽  
Ic50 Value

Antioxidant activities of Syzygium polyanthum leaves extracts (methanol, ethyl acetate, dichloromethane and n-hexane) were evaluated by using DPPH (2,2-diphenyl-2-picrylhydrazyl) and ABTS (2,2’-azinobis (3-ethylbenzothiazole-6-sulfonic acid) methods. The methanol extract showed the highest antioxidant activity of DPPH assay among extract with IC50 value of 44.35 mg/mL. In addition, methanol extract also showed the highest antioxidant activity of ABTS assay among extracts with IC50 value of 17.69 mg/mL. This study indicated that the methanol extract of S. polyanthum leaves is potential as antioxidant.

ANTIOXIDANT ACTIVITY OF FOREST MANGGOSTEEN (Garcinia hombroniana Pierre) FRACTION USING DPPH AND ABTS METHOD

2021 ◽  
Vol 9 (Spl-2-ICOPMES_2020) ◽  
pp. S280-S285
Author(s):  
Ismail . ◽  
◽  
Mufidah . ◽  
Sukamto S. Mamada ◽  
Amrianto . ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Antioxidant Activities ◽  
Bark Extract ◽  
Active Fraction ◽  
Dpph Assay ◽  
Abts Assay ◽  
Ic50 Value ◽  
Vacuum Column ◽  
Qualitative Determination

This study was carried out to determine the active antioxidant fraction of Garcinia hombroniana bark extract by the DPPH and ABTS method. Along with this, the study also attempts to identify the class of compounds present in the various extract of G. hombroniana by the active fraction. The bark extract of G. hombroniana was prepared by the multilevel maceration method by using three solvents including n-hexane, ethyl acetate, and 96% ethanol. Results of study suggested that n-hexane (HSE), ethyl acetate (EASE) and ethanol 96% extract (ESE) have antioxidant activity with IC50 value of 423 ± 16.72 μg/mL, 284.89 ± 2.7μg/mL, and 10.49 ± 0.19 μg/mL in DPPH assay, while these extracts showed IC50 value of 560.92 ± 48.86 μg/mL, 430.18 ± 16.65 μg/mL, and 13.92 ± 0.57 μg/mL respectively in ABTS assay. Further, fractionated using vacuum column chromatography revealed the presence of five fractions viz., A, B, C, D, and E. Among these, fractions D showed the highest antioxidant activity with an IC50 value of 4.83 ± 0.18 μg/mL and 6.82 ± 0.31 μg/mL in DPPH and ABTS assays. Results of the fractioned analysis and qualitative determination showed that the active fraction of G. hombroniana contained flavonoid, triterpenoid, alkaloid, and saponin compounds, and antioxidant activities of these extracts might be due to the presence of these active ingredients.

scholarly journals ANTIOXIDANT ACTIVITY OF RED ROSE LEAVES (Rosa chinensis Jacq.) EXTRACT

2021 ◽  
Vol 3 (2) ◽  
pp. 81-88
Author(s):  
Deviyanthi Nur Afifah ◽  
Yessy Yessy ◽  
Farida Nur Rahmani ◽  
Ayu Lia Ningsih ◽  
Citra Dewi Puspita Sari ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Activity Index ◽  
Radical Reactions ◽  
Dpph Assay ◽  
Free Radical Reactions ◽  
Rosa Chinensis ◽  
Ic50 Value ◽  
Hexane Extracts

Background: Background: Antioxidants are compounds that can neutralize free radical reactions. The red rose leaves (Rosa chinensis Jacq.), usually disposed of as waste, have been shown to have antioxidant activity. Objective: This study aims to determine the antioxidant activity of red rose leaves extracts. Methods: The red rose leaves were extracted by the maceration method in ethanol, methanol, ethyl acetate, and n-hexane. The antioxidant activity was measured by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and was expressed as IC50 and an antioxidant activity index (AAI).Results: The results showed that the red rose leaves ethanol, methanol, ethyl acetate, and n-hexane extracts had an antioxidant activity with an IC50 value of 1.8, 8.7, 210.3, 48.7 µg/mL, respectively, and an AAI value of 17.3, 3.5, 0.1, 0.6, respectively. The main content of ethanol and methanol extracts are flavonoid, saponin, and tannin.Conclusion: The ethanol and methanol extract showed the most potent antioxidant activity.

scholarly journals Limpasu Pericarpium : an Alternative Source of Antioxidant From Borneo with Sequential Maceration Method

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Irfan Zamzani ◽  
Nita Triadisti
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Oxidation Process ◽  
Antioxidant Activities ◽  
Alternative Source ◽  
Dpph Method ◽  
Indigenous Plant ◽  
Ic50 Values

Antioxidants are substances that can slow down the oxidation process of free radicals. Limpasu plant (Baccaurea lanceolata (Miq) Muell. Arg), an indigenous plant of Borneo, is a natural antioxidant source. The purpose of this study was to determine the antioxidant activity of the limpasu pericarpium extract. The extraction of the limpasu pericarpium was done by maceration method using solvents with increasing polarity ranging from n-hexane, ethyl acetate, and methanol. Antioxidant activities of the three extracts were measured by the DPPH and FRAP methods. The IC50 values of n-hexane, ethyl acetate, and methanol extracts, as well as quercetin using the DPPH method were 517,45 µg/mL, 530,64 µg/mL, 10,63 µg/mL and 6,83 µg/mL, respectively. Meanwhile, the IC50 values obtained from FRAP method were 198,96 µg/mL, 190,07 µg/mL, 661,36 µg/mL, and 7,09 µg/mL, respectively. The results revealed that the methanol extract is more potent than other extracts tested for antioxidant activity.

scholarly journals DETERMINATION OF THE ANTIOXIDANT ACTIVITY OF PRASMAN LEAF EXTRACTS (AYAPANA TRIPLINERVIS [VAHL]) AND THE TOTAL FLAVONOID AND PHENOL CONTENTS OF THE MOST ACTIVE EXTRACTS

2020 ◽  
pp. 107-111
Author(s):  
YUNITRIANTI ◽  
BERNA ELYA ◽  
ARIKADIA NOVIANI
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Total Flavonoid ◽  
Dpph Assay ◽  
Frap Assay ◽  
Methanol Extracts ◽  
Uv Visible ◽  
Antioxidant Effects

Objective: Prasman (Ayapana triplinervis [Vahl]) is a plant that can eliminate free radicals through its antioxidant effects. However, little research hasbeen conducted to explore the antioxidant activity of the plant.Methods: A. triplinervis (Vahl) leaves, which were determined by the Indonesian Institute of Sciences (LIPI) Bogor, were used in this study. Meanwhile,extraction was performed using n-hexane, ethyl acetate, and methanol as the solvents. Based on the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay usinga UV–visible spectrophotometer and based on ferric reducing antioxidant power (FRAP) assay using a microplate reader.Results: Based on the DPPH assay using a UV–visible spectrophotometer, n-hexane, ethyl acetate, and methanol extracts with a final concentrationof 25 μg/mL inhibited DPPH radical production by 38.91, 51.03, and 54.06%, respectively. Using the percent inhibition, the IC50 for the ethyl acetateand methanol extracts were 28.71 and 23.472 μg/mL, respectively. Based on FRAP assay using a microplate reader, the n-hexane, ethyl acetate, andmethanol extracts had ferrous equivalent antioxidant capacity values of 460, 828.99, and 940.22 μmol/g, respectively. The methanol extract had thegreatest antioxidant activity. The ethyl acetate and methanol extracts at the initial concentrations contained total phenol levels of 12.06 and 42.11 mgGAE/g extract, respectively, as well as total flavonoid levels of 3.24 and 3.41 mg QE/g extract, respectively.Conclusion: Based on the determination of phenol and flavonoid levels, the methanol extract had the greatest antioxidant effects.

scholarly journals ISOLATION AND CHARACTERIZATION OF ANTIOXIDANT COMPOUNDS FROM ETHYL ACETATE AND METHANOL EXTRACTS OF GARCINIA DAEDALANTHERA PIERRE LEAVES

2018 ◽  
Vol 10 (1) ◽  
pp. 276
Author(s):  
Anisa Puspitaningrum ◽  
Berna Elya ◽  
Katrin .
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Column Chromatography ◽  
Spectrum Analysis ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Uv Light ◽  
Antioxidant Compounds ◽  
Isolation And Characterization ◽  
Dpph Method

Objective: This study aimed to isolate and characterize the compounds responsible for the high antioxidant activities of the ethyl acetate and methanolextracts of Garcinia daedalanthera Pierre leaves.Methods: In this study, the ethyl acetate extract was obtained by column chromatography, and the methanol extract was obtained by vacuum columnchromatography. The mobile phase comprised n-hexane, ethyl acetate, and methanol with increased polarity. Antioxidant activity was examined usingthe 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The fraction with the highest antioxidant activity was purified through column chromatography,recrystallization, and preparative thin-layer chromatography. This fraction, termed the isolate of B, was identified using DPPH and AlCl3, and itsantioxidant activity was quantitatively tested.Results: From this research, 21.7 mg of the isolate of B were obtained with an IC50 of 5.82 μg/mL. Identification using an AlCl3 sprayer producedyellow phosphorescent spots under UV light. UV-Vis spectrum analysis revealed the presence of an aromatic compound and conjugated double bonds.Infrared spectrum analysis revealed the presence of −OH, C–H alkane, C=C aromatic, C=O, and C-O-C groups.Conclusion: Based on this research, 21.7 mg of the isolate of B was derived through fractionation of the methanol extract, and this isolate exhibitedantioxidant activity with an IC50 of 5.82 μg/mL. The isolate of B was considered to be a flavonoid, as it was fluorescent under UV light (366 nm) afterbeing sprayed with AlCl3 reagent.

scholarly journals UJI AKTIVITAS ANTIOKSIDAN BEBERAPA EKSTRAK ALGA COKLAT Sargassum polycystum DAN Turbinaria deccurens ASAL PULAU DUTUNGAN SULAWESI SELATAN TERHADAP RADIKAL DPPH

2019 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Fitriyanti Jumaetri Sami ◽  
Nunuk Hariani Soekamto ◽  
Firdaus Firdaus ◽  
Jalifah Latip
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Ethyl Acetate ◽  
Antioxidant Activities ◽  
Antioxidant Vitamin ◽  
Activity Assay ◽  
Immersion Method ◽  
Ic50 Value ◽  
Measured Absorption ◽  
Hexane Extracts

This study used S. polycystum and T. deccurens were extracted with various solvents (n-hexane, ethyl acetate and ethanol) to determine phytochemical screening and antioxidant activities. Extraction of samples by maceration method, antioxidant activity assay using the immersion method of DPPH (1,1-Diphenyl-2-picryl Hidrazil) measured absorption at a wavelength of 515 nm and compared with the control of antioxidant vitamin C. The results showed that antioxidant activity of the methanol, ethyl acetate, n-hexane extract of S. polycystum have low antioxidant activity with the value IC50 340,06, 180,54, and 502,25 mg/mL. Methanol, ethyl acetate, n-hexane extracts of  T. deccurens have low antioxidant activity with value IC50 491,02, 411,80, and 502,7 mg/mL. This potential is lower than vitamin C IC50 value of 1,72 mg/mL. 

AKTIVITAS ANTIOKSIDAN DAN FLAVONOID EKSTRAK BIJI KURMA

EKOLOGIA ◽  
2020 ◽  
Vol 19 (1) ◽  
pp. 34-38
Author(s):  
Siti Warnasih ◽  
Diana Widiastuti ◽  
Uswatun Hasanah ◽  
Laksmi Ambarsari ◽  
Purwantiningsih Sugita
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Soxhlet Extraction ◽  
Ethyl Acetate Fraction ◽  
Positive Control ◽  
Palm Fruit ◽  
Ic50 Value ◽  
Dpph Method ◽  
Fruit Processing

Date seeds are waste from palm fruit processing that has not been utilized optimally. Date seeds contain flavonoids which are known to act as antioxidants. The aim of this study was to determine the antioxidant activity and flavonoid of methanol extract which was carried out by soxhletation and its fractionation results. Date seeds are made into simplicia, soxhlet extraction with methanol, then the methanol extract is fractionated in stages by liquid-liquid partition with n-hexane, ethyl acetate, and n-butanol. Each fraction and extract was determined by its antioxidant activity with the DPPH method and its flavonoid was determined by spectrophotometry. Ethyl acetate fraction has the strongest antioxidant activity with the lowest IC50 value, that is equal to 5.74 ± 0.05μg/mL, followed by methanol extract of 9.55±0.53 μg/mL, n-butanol fraction 19.73±0,58 μg/mL, and n-hexane fraction of 289.59±10.52 μg/mL, while the IC50 value for vitamin C as a positive control was 4.29±0.74 μg/mL. The highest flavonoids were produced from ethyl acetate fractions which amounted to 1484.33 ± 161.47 mg Quercetin Equivalent (QE) / 100 g, followed respectively by methanol extract of 282.84±13.72 mg QE/100 g.

scholarly journals Antioxidant Activity of Multifarious Solvent Extracts of Leaf. (Plumbago Zeylanica)

2019 ◽  
Vol 35 (2) ◽  
pp. 718-722
Author(s):  
D. Roselin Jenifer ◽  
B. R. Malathy
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Antioxidant Activities ◽  
Reducing Power ◽  
Chloroform Extract ◽  
Assay Method ◽  
Dpph Assay ◽  
Leaf Extracts ◽  
Plumbago Zeylanica ◽  
Reducing Power Assay

The current investigation is focused to determine antioxidant activities of the leaf extract of Plumbago zeylanica. The leaf extracts were prepared by using multiform solvents with increasing polarity, including as hexane, chloroform, ethyl acetate and Methanol. The antioxidant activities enlisting DPPH assay, hydrogen peroxide assay, reducing power assay and nitric oxide assay method were performed for all extracts. Barring no one, the extracts had shown average to potent antioxidant activity. Uniquely, the ethyl acetate extract and the chloroform extract explicated the utmost antioxidant activity.

scholarly journals Antioxidant Activities of n-Hexane Soluble and Insoluble Fraction, Ethyl Acetate Soluble and Insoluble Fraction from Ethanol Extract of Sambung Nyawa Leaf (Gynura procumbens (Lour.) Merr.)

2019 ◽  
Vol 24 (2) ◽  
pp. 91
Author(s):  
Purwantiningsih Purwantiningsih ◽  
Retno Murwanti ◽  
Lukman Hakim
Keyword(s):  
Antioxidant Activity ◽  
Vitamin C ◽  
Ethyl Acetate ◽  
Soluble Fraction ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Ethanol Extract ◽  
Insoluble Fraction ◽  
Ic50 Value ◽  
Antioxidant Potency

There were many plants containing flavonoids which can function as antioxidant. Antioxidant can be used to decrease the mortality rate caused by degenerative and infectious diseases. This study aims to determine the antioxidant potency of n-hexane soluble and insoluble fraction, ethyl acetate soluble and insoluble fraction, and the ethanol extract antioxidant activity of Sambung Nyawa leaf (Gynura procumbens (Lour.) Merr.). The ethanol extract of G. procumbens leaves was obtained by maceration using 70% ethanol then fractionated using hexane and ethyl acetate to obtain the n-hexane soluble fraction, n-hexane insoluble fraction, ethyl acetate soluble fraction, and ethyl acetate insoluble fraction. The antioxidant activity study of ethanol extract, n-hexane soluble, and insoluble fraction, ethyl acetate soluble, and insoluble fraction of G. procumbens was carried out using DPPH (2,2- diphenyl-1-picrylhydrazyl) method to evaluate its free radical scavenging activity with a comparison of vitamin C. The antioxidants activity was expressed as IC50 value. The IC50 value for vitamin C and ethanol extract of G. procumbens leaves were 2.41 µg/ml and 200 µg/ml. On the other hand, the n-hexane soluble and insoluble fraction had an IC50 value of 78 µg/ml and 34 µg/ml, while ethyl acetate soluble and insoluble fraction had the potency as an antioxidant with an IC50 value of 419 µg/ml and 151 μg/ml, respectively. Based on the results obtained, the antioxidant potency of G. procumbens ethanol extract and their fraction were successively of n-hexane insoluble fraction > n-hexane soluble fraction > ethyl acetate insoluble fraction > ethanol extract > ethyl acetate soluble fraction.

scholarly journals FITOKIMIA DAN AKTIVITAS ANTIOKSIDAN EKSTRAK KULIT BATANG Chisocheton sp. (C.DC) Harms (Meliaceae)

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Dewa Gede Katja
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Ethyl Acetate Extract ◽  
Stem Bark ◽  
Bark Extract ◽  
Test Results ◽  
Ic50 Value ◽  
Dpph Method ◽  
Stem Bark Extract

Tujuan penelitian ini untuk mengetahui golongan senyawa metabolit sekunder dan aktivitas antioksidan dari setiap ekstrak kulit batang Chisocheton sp. C.DC Harms (Meliaceae). Hasil ekstraksi 200 g serbuk kulit batang Chisocheton sp. C.DC Harms (Meliaceae) dengan n-heksana, etil asetat dan metanol masing-masing dengan 2000 mL berturut-turut menghasilkan 7,193 g ekstrak pekat n-heksana, 8,798 g ekstrak pekat etil asetat dan 18,683 g ekstrak pekat metanol. Hasil uji fitokimia menunjukkan adanya golongan senyawa flavonoid, triterpenoid dan tanin. Hasil uji aktivitas antioksidan dengan metode DPPH menunjukkan bahwa ekstrak n-heksana memberikan nilai IC50 sebesar 337,28 µg/mL, ekstrak metanol sebesar 216,73 µg/mL, dan ekstrak etil asetat sebesar 199,89 µg/mL yang berarti etil asetat memiliki kemampuan yang paling besar dalam menangkap radikal bebas.ABSTRACTThe objective of this study was determine the class of secondary metabolite compounds and antioxidant activity of each stem bark extract of Chisocheton sp. C.DC Harms (Meliaceae). The results of the extraction of 200 g Chisocheton sp. C.DC Harms (Meliaceae) with n-hexane, ethyl acetate and methanol with 2000 mL each yielded 7,193 g of concentrated extract n-hexane, 8,798 g of concentrated extract of ethyl acetate and 18,683 g of concentrated methanol extract. Phytochemical test results showed the presence of flavonoid, triterpenoid and tannin compounds. The results of the antioxidant activity test using the DPPH method showed that the n-hexane extract gave an IC50 value of 337,28 µg/mL, methanol extract was 216,73 µg/mL, and ethyl acetate extract was 199,89 µg/mL which means that ethyl acetate has the ability to greatest in capturing free radicals.

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