scholarly journals Antioxidant activities of allspice extracts in rapeseed oil

2000 ◽  
Vol 18 (No. 2) ◽  
pp. 49-51 ◽  
Author(s):  
D.V. Nguyen ◽  
M. Takácsová ◽  
M.N. Dang ◽  
K. Kristiánová
Keyword(s):  
Rapeseed Oil ◽  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Chloroform Extract ◽  
Antioxidant Effect ◽  
Hexane Extract ◽  
Antioxidant Effectiveness ◽  
The Stability ◽  
Benzene Extract

Spices are an important component of both commercial and homemade foods. Many spices have been shown to possess an antioxidant effect. In our study, we tested the activity of different allspice extracts (ethanol, chloroform, diethylether, benzene and hexane) on the stability of rapeseed oil. The order of antioxidant effectiveness was as follows: ethanol extract > chloroform extract> diethylether extract > benzene extract > hexane extract. The ethanol extract exhibited a remarkable antioxidant effect.

scholarly journals EFFECT OF Mg (II) METAL ION ON ANTIOXIDANT ACTIVITIES OF ETHANOL EXTRACTS OF RAMBUTAN PEEL (Nephelium lappaceum)

2019 ◽  
Vol 11 (1) ◽  
pp. 46
Author(s):  
Emmi Astuti ◽  
Ahyar Ahmad ◽  
Seniwati Dali
Keyword(s):  
Antioxidant Activity ◽  
Metal Ion ◽  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Anthocyanin Content ◽  
Total Anthocyanin ◽  
Nephelium Lappaceum ◽  
Ethanol Extracts ◽  
The Stability ◽  
The One

Anthocyanin is the one of natural dyes that often used in foodstuffe, because anthocyanin can make a more color like red, blue and purple. Anthocyanin storage can make anthocyanin is damage, because the interaction with tempherature, light, and oxygen show that can given effect about the stability anthocyanin color, and decrease the anthocyanin as an antioxidant. That problem can be solved with copigmentation, that is an anthocyanin reaction with metal ion. In this study can showed that ethanol extract from Rambutan peel and we obtained 23.824 gram with total anthocyanin content of 709.3866 mg/L with antioxidant activity of 0.0046 μg/mL, and then the extract of anthocyanin with metal ion Mg2+ in concentration 50; 100 and 150 ppm had IC50 are 0.0061; 0.0048 and 0.0067 μg/mL. This conclution from the added of metal ion Mg2+ showed that has not show much different antioxidant activity. 

scholarly journals Bioactivity and Toxicity of Senna cana and Senna pendula Extracts

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
J. A. Monteiro ◽  
J. M. Ferreira Júnior ◽  
I. R. Oliveira ◽  
F. L. A. Batista ◽  
C. C. C. Pinto ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Artemia Salina ◽  
Polyphenolic Compounds ◽  
Hexane Extract ◽  
Antioxidant Potential ◽  
Therapeutic Uses ◽  
Inhibitory Activities ◽  
Ethanol Extracts

This work investigated the content of total polyphenolic compounds and flavonoids as well as their toxicity and larvicidal and acetylcholinesterase inhibitory activities. The antioxidant activities of two medicinal Senna species extracts (Senna cana and Senna pendula) were also investigated. The ethanol extract of the leaves of S. cana and the ethanol extract of the branches of S. pendula presented the best performance in the DPPH/FRAP and ABTS/ORAC assays, respectively. For the inhibition of acetylcholinesterase, the hexane extract of the flowers of S. pendula presented the lowest IC50 value among the ethanol extracts of the leaves of S. cana and showed the best performance in some assays. The hexane extract of the leaves of S. pendula and the hexane extract of the branches of S. cana were moderate to Artemia salina Leach. In the quantification of phenols and flavonoids, the ethanol extract of the leaves of S. cana presented the best results. The ethanol extracts of the leaves of S. cana were found to be rich in antioxidants, phenolic compounds, and flavonoids. These results indicate the antioxidant potential of the extracts of Senna species and can be responsible for some of the therapeutic uses of these plants.

scholarly journals Phytochemical Screening and Antibacterial Activity of Acorus calamus L. Extracts

2019 ◽  
Vol 4 (1) ◽  
pp. 68-78
Author(s):  
Bayyinatul Muchtaromah ◽  
Alfiah Hayati ◽  
Erna Agustina
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Ethanol Extract ◽  
Inhibition Zone ◽  
Common Species ◽  
Chloroform Extract ◽  
Hexane Extract ◽  
Acorus Calamus ◽  
E Coli ◽  
Microdilution Method

  Staphylococcus aureus and Escherichia coli are among the most common species of gram-positive and gram-negative bacteria, which cause vaginitis, in infertile women. The Calamus rhizome (Acorus calamus L.) is an Indonesian plant that has antibacterial properties that can be used to treat vaginitis and increase fertility. The aim of this study was to determine the phytochemical and antibacterial activity of the calamus rhizoma in polar, semi-polar and non-polar solvents in the growth of S. aureus and E. coli. The antibacterial activity test was in the form of inhibitory test using the Kirby-Bauer, Minimum Inhibi-tion Concentration (MIC) and Minimum Bactericidal Concentration (MBC) by microdilution method with multilevel dilution (concentra-tions 50; 25; 12.5; 6.25; 3.13; 1.56; 0.78; and 0.39%). The screening results showed that ethanol and n-hexane extract contained alkaloids and triterpenoids, while chloroform extract was only triterpenoid. Chloroform extract produced the largest inhibition zone diameter of S. aureus and E. coli (7.26 and 3.28 mm), followed by ethanol extract (5.90 and 3.07 mm) and n-hexane extract (5.33 and 2.95 mm). The concentrations of 0.39 and 0.78% were the values of MIC and MBC for all three extracts, indicating that the extract of the calamus rhizome with several solvents in this study had the same antibacterial activity. 

Phytochemical composition and antioxidant activity of Malus baccata (L.) Borkh. fruits

2020 ◽  
Vol 3 (1) ◽  
pp. 47
Author(s):  
Nadezhda Petkova ◽  
Manol Ognyanov ◽  
Blaga Inyutin ◽  
Petar Zhelev ◽  
Panteley Denev
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Titratable Acidity ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Frap Assay ◽  
Phytochemical Composition ◽  
Malus Baccata

Crab apple (Malus baccata (L.) Borkh.) was mainly distributed in Europe as an ornamental plant, but the nutritional properties of its edible fruits were not fully revealed. The aim of the current study was to characterize the phytochemical composition of ripen carb apple fruits and to evaluate their nutritional and antioxidant potentials. The fruits were assayed for moisture and ash content, proteins, lipids, carbohydrates, titratable acidity (TA), pH, total phenolic compounds and natural pigments. Among the analyzed carbohydrates cellulose was found in the highest content (6% dw), followed by sugars (sucrose, glucose and fructose) and 1.8 % dw uronic acids. The total chlorophylls and carotenoids contents in their fruits were 6.51 and 4.80 μg/g fw, respectively. Total monomeric anthocyanins were not detected. The highest content of total phenolic compounds (2.67 mg GAE/g fw) was found in 95 % ethanol extract from fruits, while the total flavonoids were relatively low – 0.1 mg QE/g fw. DPPH assay (17.27 mM TE/g fw) and FRAP assay (14.34 mM TE/g fw) demonstrated in vitro antioxidant activities of crabapple. Malus baccata fruits were evaluated as a rich source of dietary fibers and phenolic compounds with significant antioxidant potential that could be used in human nutrition.

Comparison of Hypoglycemic and Antioxidant Activities of the Compounds Isolated from Ficus hispida Linn. and Ficus pomifera Wall

2020 ◽  
Vol 10 (5) ◽  
pp. 621-630
Author(s):  
Ashalata Nepram ◽  
Sujata Wangkheirakpam ◽  
Warjeet S. Laitonjam
Keyword(s):  
Methanol Extract ◽  
Antioxidant Activities ◽  
Tolerance Test ◽  
Chloroform Extract ◽  
Diabetic Rats ◽  
Hypoglycemic Activity ◽  
North East India ◽  
North East ◽  
Dpph Method ◽  
Ficus Hispida

Background: Traditional knowledge has been a legacy of the past to the present. Barks of Ficus hispida Linn. and leaves of Ficus pomifera Wall. (Moraceae) have been used traditionally for the treatment of diabetes in North-east India and many other places. As many drugs have been developed from traditional plants, the authors have taken up the plants for the study of hypoglycemic activity. Objective: To investigate the hypoglycemic activities of the triterpenoids isolated from the plants and their antioxidant activities. Methods: The bioactive compounds were determined by biochemical analysis, antioxidant activity using DPPH method. Hypoglycemic activity was detected using glucose tolerance test in normal rats and alloxan induced diabetic rats with Gliclazide as standard. Results: The biochemicals and trace elements were present in appreciable amounts. Triterpenoids, (1-5), from F. pomifera and 19-hydroxyphlogacantholide (6), 3-O-[ß-D-glucopyranosyl-(1’→2’)-α- L-rhamnopyranosyl-phlogacanthoside] (7) and galanolactone (8) along with stigmasterol (9), stigmasta- 5,22-dien-7-on-3ß-ol (10), 5-(decahydro-1,1,4a-trimethyl-6-methylene-5-yl)-3-methylpent-2- enal (11), stigmasterol glucoside (12) and stigmast-4-en-3-one (13) from F. hispida Linn., respectively, were isolated. The different extracts of the barks and leaves of these plants along with the isolated compounds had antioxidant and hyploglycemic activities. Conclusions: The five triterpenoids (1-5) were isolated from the methanol extract of the leaves of F. pomifera, and compounds (6-13) were isolated from the chloroform extract of the barks of F. hispida. Methanol extract of the leaves of F. pomifera and the chloroform extract of the barks of F. hispida; compounds (1-13) isolated from these two plants reduced DPPH free radicals in a concentrationdependent manner. It was also observed that the methanol and chloroform extracts of the plants, F. pomifera and F. hispida respectively, and the compounds (1, 6 & 7) exhibited anti-diabetic properties and also caused a highly significant reduction in the blood glucose levels of normal rats.

Evaluation of Snake Venom’s PhospholipaseA2 Enzyme Inhibition Activity of Cyphostemma adenocoule

2020 ◽  
Vol 14 (3) ◽  
pp. 196-202
Author(s):  
Atul Kaushik ◽  
Teamrat S. Tesfai ◽  
Daniel K. Barkh ◽  
Furtuna K. Ghebremeskel ◽  
Habtom G. Zerihun ◽  
...  
Keyword(s):  
Enzyme Inhibition ◽  
Snake Venom ◽  
Ethanol Extract ◽  
Egg Yolk ◽  
Chloroform Extract ◽  
Inhibition Activity ◽  
Traditional Use ◽  
Snake Bites ◽  
Ethanol Extracts

Background: A snake bite is fundamentally an injury often resulting in puncture wounds meted out by the animal's fangs and occasionally resulting in envenomation. Rate of snake bites around 5,400,000 bites per year leads to over 2,500,000 envenomings and around 125,000 fatal cases annually. Snake venom enzymes are rich in metalloproteinases, phospholipaseA2, proteinases, acetylcholinesterases and hyaluronidases. Objective: Cyphostemma adenocoule is traditionally being used for the treatment of snake bites in Eritrea. The present research was aimed at evaluating the snake venom enzyme inhibition activity of C. adenocoule against puff adder venom and developing a base for the traditional use of the plant against snakebites in Eritrea. Methods: The anti-venom activity of C. adenocoule was assessed in-vitro through phospholipaseA2 enzyme inhibition assay using egg yolk as a cell. The ethanol and chloroform extracts of C. adenocoule showed in vitro anti phospholipase A2 activity, whereas the water extracts of the plant showed no activity. Results: Among the extracts of C. adenocoule, the highest percentage of inhibition was obtained from chloroform extract (95.55% at 100mg/ml). The extract showed prominent activity at different concentrations (34.7% at10mg/ml, 48.8% at 20mg/ml, 54.8% at 40mg/ml, 60.9% at 60mg/ml, 80.5% at 80mg /ml). The ethanol extract also showed certain activity at various concentrations (25.22% at10mg/ml, 14.78% at 20mg/ml, 2.6% at40mg/ml). The activity of the chloroform extracts increases as concentration increases, whereas the activity of the ethanol extracts decreases as concentration increases. The aqueous extract of C. adenocoule did not show any activity at all concentrations. Conclusion: In this study, the chloroform and ethanol extracts of the plant inhibited the enzyme of interest and thus proved the efficacy of anti-snake venom activity of the plant.

scholarly journals Effect of particle size on phytochemical composition and antioxidant properties of Sargassum cristaefolium ethanol extract

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Prasedya ◽  
A. Frediansyah ◽  
N. W. R. Martyasari ◽  
B. K. Ilhami ◽  
A. S. Abidin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Particle Size ◽  
Antioxidant Activities ◽  
Antioxidant Properties ◽  
Ethanol Extract ◽  
Total Phenolic ◽  
Particle Sizes ◽  
Epicatechin Gallate ◽  
Particle Size Reduction ◽  
Phytochemical Composition

AbstractSample particle size is an important parameter in the solid–liquid extraction system of natural products for obtaining their bioactive compounds. This study evaluates the effect of sample particle size on the phytochemical composition and antioxidant activity of brown macroalgae Sargassum cristaefolium. The crude ethanol extract was extracted from dried powders of S.cristeafolium with various particle sizes (> 4000 µm, > 250 µm, > 125 µm, > 45 µm, and < 45 µm). The ethanolic extracts of S.cristaefolium were analysed for Total Phenolic Content (TPC), Total Flavonoid Content (TFC), phenolic compound concentration and antioxidant activities. The extract yield and phytochemical composition were more abundant in smaller particle sizes. Furthermore, the TPC (14.19 ± 2.08 mg GAE/g extract to 43.27 ± 2.56 mg GAE/g extract) and TFC (9.6 ± 1.8 mg QE/g extract to 70.27 ± 3.59 mg QE/g extract) values also significantly increased as particle sizes decreased. In addition, phenolic compounds epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and Epigallocatechin gallate (EGCG) concentration were frequently increased in samples of smaller particle sizes based on two-way ANOVA and Tukey’s multiple comparison analysis. These results correlate with the significantly stronger antioxidant activity in samples with smaller particle sizes. The smallest particle size (< 45 µm) demonstrated the strongest antioxidant activity based on DPPH, ABTS, hydroxyl assay and FRAP. In addition, ramp function graph evaluates the desired particle size for maximum phytochemical composition and antioxidant activity is 44 µm. In conclusion, current results show the importance of particle size reduction of macroalgae samples to increase the effectivity of its biological activity.

scholarly journals FRACTIONATION OF THE N-HEXANE EXTRACT OF GARCINIA BANCANA MIQ. (MANGGIS HUTAN) LEAVES AND ITS ANTIOXIDANT ACTIVITY BASED ON 1,1-DIPHENYL-2- PICRYLHYDRAZYL AND FERRIC REDUCING ANTIOXIDANT POWER ASSAYS

2018 ◽  
Vol 10 (1) ◽  
pp. 407
Author(s):  
Dewi Kumala Putri ◽  
Berna Elya ◽  
Nuraini Puspitasari
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Activities ◽  
Hexane Extract ◽  
Phytochemical Screening ◽  
Active Fraction ◽  
Leaf Extracts ◽  
Antioxidant Power ◽  
Dpph Method ◽  
Ferric Reducing Antioxidant Power

Objective: To assess the antioxidant activity from another part of the plant, in this study, leaf extracts in n-hexane were fractionated.Methods: Ten fractions were obtained and tested in vitro for antioxidant activity using two methods, 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferricreducing antioxidant power (FRAP), to identify the most active fraction.Results: The IC50 of the most active fraction was 36.24 μg/mL using the DPPH method, and the EC50 was 39.54 μg/mL using the FRAP method. Themost active fraction was also shown to contain terpenoids.Conclusion: The most active fraction of an n-hexane extract of the leaves of Gacinia bancana Miq., which was tested by both DPPH and FRAP methodshad antioxidant activities with IC50 and EC50 values of 36.2482 μg/mL and 39.5442 μg/mL, respectively. Phytochemical screening showed that activefraction contains terpenoids.

Evaluation of antioxidant activities of ethanol extract from Ligusticum subjected to in-vitro gastrointestinal digestion

2018 ◽  
Vol 119 ◽  
pp. 417-424 ◽  
Author(s):  
Huifang Ge ◽  
Yazhen Chen ◽  
Jicheng Chen ◽  
Jingjing Tian ◽  
Xiaofeng Liang ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Gastrointestinal Digestion ◽  
In Vitro Gastrointestinal Digestion
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