scholarly journals AKTIVITAS ANTIOKSIDAN DAN ANTIBAKTERI EKSTRAK DAUN Jatropha gossypifolia L

Alotrop ◽  
2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Nia Sapitri Pangestu ◽  
Nurhamidah Nurhamidah ◽  
Elvinawati Elvinawati
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Leaf Extract ◽  
Propionibacterium Acnes ◽  
Inhibition Zone ◽  
Ethyl Acetate Fraction ◽  
Activity Test ◽  
Dpph Method ◽  
Jatropha Gossypifolia ◽  
Ethanol Fraction

This study was conducted to determine the activity of Jatropha gossypifolia L (jarak merah’s) leaf extract as an antioxidant and antibactery against acne causing bacteria (Propionibacterium acnes). To obtain an J. gossypifolia L jarak merah’s leaf extract by maceration using 96% ethanol, and then fractionated with n-hexane and ethyl acetate. Testing of antioxidant activity by DPPH method and antibactery activity test by the paper disc method. Antioxidant activity test has done for ethanol fraction, ethyl acetate fraction and n-hexane fraction, while testing for antibacterial activity performed on fractions active as antioxidant. The test results demonstrate the antioxidant activity of ethyl acetate fraction and the ethanol fraction as a fraction very strong with IC50 value of 22.33 ppm for ethyl acetate fraction and 41.04 ppm for ethanol fraction. Then the fraction of ethyl acetate and ethanol fraction antibactery activity test, the result is known that both factions have the ability to inhibit the growth of bacteria Propionibacterium acnes demonstrated by the inhibition zone is formed. In 1000 ppm is formed diameter of the greatest inhibition zone that is equal to 6 mm for ethyl acetate fraction and 5 mm for ethanol fraction.

Antioxidant Activity, Inhibition α-Glucosidase of Ethanol Extract of Strychnos nitida G. Don and Identification of Active Compounds

2019 ◽  
Vol 5 (3) ◽  
pp. 11-20
Author(s):  
Stefani Dhale Rale ◽  
Hasim Hasim ◽  
Syamsul Falah
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Ethanol Extract ◽  
Ethyl Acetate Fraction ◽  
Inhibition Activity ◽  
Active Compounds ◽  
Activity Inhibition ◽  
Activity Test ◽  
Ic50 Value ◽  
Treatment Of Diabetes

This study aims to find the treatment of diabetes using natural materials by exploring plants in the province of East Nusa Tenggara. his research was conducted out by extracting the Strychnos nitida G.Don stem using a method of maceration by ethanol 70%. Ethanol extract was then fractionated using n-hexane and ethyl acetate. Simplicia from maceration and fractionation results were then tested for antioxidant activity, α-glucosidase inhibition activity and identification of active compounds. The results showed that ethyl acetate fraction had the lowest IC50 value of 86.83 μg / ml. Results of the α-glucosidase activity test showed that ethyl acetate fraction and n-heksan fraction at 900 ppm had the highest percentage of inhibition of 34.23% and 33.89%. Identification using LCMS/MS method showed that ethyl acetate fraction consist of Benzenemethamine, N, N-dioctyl- as an antioxidantcompound and compound 24-methyl-5-cholestone-hexol as an antidiabetic compound. From the results of this study, we concluded that the extract of kayu ular Strychnos nitida G.Don stem has inhibition activity toward α-glucosidase enzyme.

scholarly journals Aktivitas Antioksidan Ekstrak Etanol Daun Ganitri (Elaeocarpus Ganitrus Roxb.) dengan Metode DPPH (2,2 Difenil-1-Pikrilhidazil)

2021 ◽  
Vol 18 (1) ◽  
pp. 60-67
Author(s):  
Naelaz Zukhruf Wakhidatul Kiromah ◽  
Sadam Husein ◽  
Titi Pudji Rahayu
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Leaf Extract ◽  
Ethanol Extract ◽  
Antioxidant Compounds ◽  
Synthetic Antioxidant ◽  
Activity Test ◽  
Impaired Liver ◽  
Ic50 Value ◽  
Dpph Method

Free radicals are one of the cause of various diseases. The use of synthetic antioxidant compounds could prevent the effect of the free radicals, however may cause adverse effects on the human body such as impaired liver, lung, intestinal and poisoning. Therefore antioxidant from natural resources needs to be developed. The purpose of this research was to determine the antioxidant activity and IC50 value of the ethanol extract of ganitri (Elaeocarpus ganitrus Roxbs.) leaves. Ganitri leaf ethanol extract activity test was carried out using DPPH method with vitamin C as a standard. Antioxidant activity was determined as a decreas in the absorbance of DPPH at 517 nm wavelength after an addition of the extract with the concentrations of 20, 40, 80, and 100 ppm. The antioxidant acitivity measurement of the ganitri leaf extract showed that the linier regression equation obtained was y = 0.3669x + 29.546, r = 0.4573 while the IC50 value was 54,12 ppm. Based on the result, it is concluded that the ethanol extract of ganitri (Elaeocarpus ganitrus Roxb.) leaf showed was categorized as strong antioxidant.

scholarly journals IDENTIFICATION OF SECONDARY METABOLIC AND TEST OF ACTIVITY ETHYL ACETATE FRACTION OF BANGUN¬- BANGUN (Coleus amboinicus Lour.) LEAVES AS ANTIOXIDANT

2020 ◽  
Vol 7 (1) ◽  
pp. 117-122
Author(s):  
Kasta Gurning
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Ethyl Acetate ◽  
Oxidation Process ◽  
Natural Antioxidants ◽  
Ethyl Acetate Fraction ◽  
The Body ◽  
Synthetic Antioxidants ◽  
Dpph Method ◽  
Coleus Amboinicus

Antioxidants have an important role in delaying the oxidation process and preventing the occurrence of degenerative diseases in the body. Antioxidants consist of synthetic and natural; the use of synthetic antioxidants in a relatively long period is hazardous so that the use of natural antioxidants is considered more potential and safe for the body. The process of extracting secondary metabolites from the leaves of bangun-bangun (Coleus amboinicus L.) is carried out by the maceration method with methanol, then partitioned in stages with n-hexane, chloroform, and ethyl acetate. This research intends to identify secondary metabolites and test antioxidant activity from the ethyl acetate fraction with the DPPH method. Phytochemical screening results of ethyl acetate fraction showed the different secondary metabolite groups such as alkaloids, phenolics & polyphenols, flavonoids, coumarin, and triterpenoids. Antioxidant activity (IC50) obtained is 64.97 with a healthy category, so that the potential to be used as a natural antioxidant.

scholarly journals PENENTUAN POTENSI EKSTRAK KULIT BATANG TUMBUHAN SIKKAM (Bischofia javanica Blume) SEBAGAI ANTIOKSIDAN DENGAN METODE DPPH DAN SITOTOKSIK DENGAN METODE BSLT

Alotrop ◽  
2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Dapot Parulian Manurung ◽  
Agus Sundaryono ◽  
Hermansyah Amir
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Crude Extract ◽  
Anticancer Agent ◽  
Ethyl Acetate Fraction ◽  
Hexane Fraction ◽  
Bark Extract ◽  
Test Results ◽  
Bischofia Javanica ◽  
Ethanol Fraction

This study aims to determine the level of antioxidant activity of Sikkam bark extract (Bischofia javanica Blume) and its potential as an anticancer agent. This research was conducted in November 2018 - April 2019 in the Laboratory of Chemical Education Guidance and Counseling and Basic Science Laboratory, University of Bengkulu. The sample in this study was obtained from Gunung Mariah village in Simalungun district, North Sumatra. The method used in this study was extraction using maceration, liquid-liquid fractionation, phytochemical test, DPPH (Diphenylpicrylhiydrazyl) test and BSLT test (Brine Shrimp Lethality Test). Extraction maceration using ethanol 96%, fractionation using a solvent n-hexane and ethyl acetate, phytochemical tests using Mayer's reagent, Lieberman-Burchard, FeCl3 1% and H2SO4 2N, antioxidant test using DPPH (1,1-diphenyl-2-picrylhydrazyl) and cytotoxic tests using shrimp Artemia salina Leach larvae. The results of the study on maceration of 800 grams of Sikkam bark obtained a crude extract of 53.6 grams (6.7%). Fractionation from 10 grams of crude extract obtained 7.24 gram ethanol fraction (72.4%), ethyl acetate fraction 2.14 gram (21.4%) and n-Hexane fraction 0.39 gram (3.9%). Phytochemical test results obtained the content of alkaloids, flavonoids, tannins, saponins and terpenoids with the highest yield on tannin compounds. The antioxidant activity test results obtained IC50 values in crude extracts of 20.94 ppm, ethanol fraction 36.29 ppm, ethyl acetate fraction 83.28 ppm and n-Hexane fraction 39.13 ppm which showed that crude extract, ethanol fraction, n-Hexane fraction were categorized as very strong antioxidants and Ethyl acetate fraction is categorized as a strong antioxidant. The cytotoxic test results using crude extract obtained an LC50 value of 54,827 ppm which showed that Sikkam bark extract was toxic so that it was potential as an anticancer agent.

scholarly journals ANTIBACTERIAL ACTIVITY OF FRUIT BANANA STONE AND MECHANISM

2018 ◽  
Vol 11 (13) ◽  
pp. 167
Author(s):  
Panal Sitorus ◽  
Dwi Suryanto, Hepni
Keyword(s):  
Antibacterial Activity ◽  
Ethyl Acetate ◽  
Staphylococcus Epidermidis ◽  
Propionibacterium Acnes ◽  
Ethyl Acetate Fraction ◽  
Diffusion Method ◽  
Clear Zone ◽  
Activity Test ◽  
Cellular Metabolite ◽  
Cell Leakage

Objective: The purpose of this study was to determine the strength of antibacterial activity of the fraction of banana stone and its mechanism.Methods: The antibacterial activity test was performed using the diffusion method by measuring the diameter of the clear zone around the disc paper.Results: The results of antibacterial activity test showed that ethyl acetate fraction was more effective against bacterium Staphylococcus aureus, Staphylococcus epidermidis, and Propionibacterium acnes compared to n-hexane fraction.Conclusion: The resulting cellular metabolite leak showed that cell leakage in the three bacteria due to ethyl acetate fraction had leaked more protein than nucleic acid, while the leakage of more dissolved K+ ion than Ca2 + ions.

scholarly journals ANTIOXIDANT ACTIVITY OF TARENNA POLYCARPA (MIQ.) KOORD. LEAF

2018 ◽  
Vol 11 (4) ◽  
pp. 224
Author(s):  
Rika Puspita Sari ◽  
Marline Nainggolan ◽  
Rosidah Rosidah
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Leaf Extract ◽  
Inhibitory Concentration ◽  
Ethanol Extract ◽  
Ethyl Acetate Fraction ◽  
Antioxidant Potential ◽  
Hexane Fraction ◽  
Dpph Assay

 Objective: The objective of this study is to evaluate the antioxidant activity of Tarenna polycarpa (Miq.) koord. Ex Valenton. Leaf extract and fractions.Methods: Antioxidant activity was examined by DPPH method.Results: Ethanol extract, n-hexane fraction, and ethyl acetate fraction with DPPH assay measured as half maximal inhibitory concentration were 55.21, 109.73, and 42.04 μg/mL, respectively.Conclusions: The results reveal that T. polycarpa extract and fractions have strong antioxidant potential. Our further study is to isolate compounds responsible for antioxidant components.

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 UJI AKTIVITAS ANTIOKSIDAN EKSRTRAK LUMUT HATI (Marchantia polymorpha)

KOVALEN ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 315-321
Author(s):  
Nurhaeni Nurhaeni ◽  
Gladys ◽  
Jaya Hardi
Keyword(s):  
Antioxidant Activity ◽  
Secondary Metabolites ◽  
Vitamin C ◽  
Ethyl Acetate ◽  
Polar Solvent ◽  
Hexane Extract ◽  
Marchantia Polymorpha ◽  
Dpph Method ◽  
Ethanol Fraction

The research is about antioxidant activity of the liverworts (Marchatia polymorpha) extract based on the level of a polar solvent. This research was done by maceration of liverworts by using n-hexane, ethyl acetate and ethanol solvent. The n-hexane, ethyl acetate, and ethanol fraction were tested the antioxidant activity by using DPPH method. The result was obtained for antioxidant activity (IC50) on n-hexane extract, ethyl acetate, ethanol, and vitamin C is 1065.33 ppm, 1326.52 ppm, 1876.11 ppm, and 13.45 ppm, respectively. The liverworts extract was identified contains secondary metabolites compounds of flavonoid, tannins, polyphenol, alkaloid, and steroid. Keywords: Liverwort extract, antioxidant, IC50

scholarly journals Antioxidant Activity of Syzygium samarangense L. and Their Endophytic Fungi

Molekul ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 48 ◽  
Author(s):  
Budiono Budiono ◽  
Elfita Elfita ◽  
Muharni Muharni ◽  
Heni Yohandini ◽  
Hary Widjajanti
Keyword(s):  
Antioxidant Activity ◽  
Ethyl Acetate ◽  
Endophytic Fungi ◽  
Chemical Structure ◽  
Ethyl Acetate Fraction ◽  
Spectroscopy Analysis ◽  
Potato Dextrose Broth ◽  
Dpph Method ◽  
Local Residents ◽  
Isolated Compound

Leaves of jambu air (Syzygium samarangense L.) has been used by local residents as medicine for various diseases caused by free radical agents in human’s body. This study aims to find a new source of antioxidants from medicinal plants and their endophytic fungi Syzygium samarangense leaves was fractionated by maceration method using gradient solvent i.e.  n-hexane, ethyl acetate, and methanol. The antioxidant activity of the leaf fractions was determined using 1,1diphenyl-2-picryl hydrazyl (DPPH) method. The chemical compound was isolated from active fraction by chromatographic techniques and their chemical structure was identified using spectroscopy techniques.  The endophytic fungi was isolated from S. samarangense leaves and continued to cultivation in potato-dextrose broth (PDB) medium for four weeks. The medium was extracted using ethyl acetate and determined its antioxidant activity. Fungi’s isolate with highest activity was analyzed to identify its molecular. Ethyl acetate fraction of S. samarangense leaves showed highest antioxidant activity. Spectroscopy analysis result concluded the isolated compound is 5,7-dihydroxy-6,8-dimethyl flavanone. Four endophytic fungi had been isolated form S. samarangense leaves. Antioxidant activity test showed that ethyl acetate extract of endophytic fungi BJA-1 has the highest value. Molecular identification of BJA-1 shows high homology with Lasiodiplodia venezuelensis strain CBS 129753.

scholarly journals Phytochemical Screening, Antibacterial and Cytotoxic Activity of Dendobium lasianthera J.J.Sm. from Papua

2020 ◽  
Vol 12 (2) ◽  
pp. 93-101
Author(s):  
Verena Agustini ◽  
Eva S. Simaremare ◽  
Elsye Gunawan ◽  
Jane Awom ◽  
Susan Wopi
Keyword(s):  
Ethyl Acetate ◽  
Ethanol Extract ◽  
Inhibition Zone ◽  
Ethyl Acetate Fraction ◽  
Hexane Fraction ◽  
Diffusion Method ◽  
Phytochemical Screening ◽  
Cytotoxic Potential ◽  
Stem Extract ◽  
Ethanol Fraction

The aims of the study are to evaluate bioactive compounds, antibacterial and cytotoxic potential of D. lasianthera. This orchid grows well all over New Guinea Island as an ornamental plant because of their beautiful flowers. Orchids also known rich of its phytochemical compounds which already used as a traditional medicine in many countries around the world. However, research in pharmacological fields is still limited. In this study, leaves and stem of D. lasianthera were powdered and extracted with ethanol followed by fractionated using n-hexane, ethyl acetate, and ethanol solvent. Extract as well as fraction were tested for phytochemical screening and determined antibacterial activity against Escherichia coli and Staphylococcus aureus using Disc Diffusion Method. Brine Shrimp Lethality Test (BSLT) was used to observe cytotoxic potential of leaves and stem extract and fraction at 10, 50, 100, 250, 500, 750, and 1000 ppm. The results showed that the leaves and stem extract contained tannin and alkaloids, separately. The ethanol extract of D. lasianthera showed 7.35 mm (leaves) and 7.43 mm (stem) inhibition zone against S. aureus Furthermore, the maximum inhibition zone of ethanol fraction of leaves and n-hexane fraction of stem were 8.42 mm and 8.10 mm separately. The LC50 of stem extract and fractions in these study were 699.3 ppm (ethanol extract), 602.1 ppm (ethyl acetate), 329.6 ppm (n-hexane fraction) and 676 ppm (ethanol fraction), whereas for leaves, only ethyl acetate fraction has toxict activity with an average LC50 833.2 ppm. Key words: D. lasianthera; phytochemical screening; antibacterial; cytotoxicity; Papua. 

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