Free Radical Scavenging Method Research Articles

Gallic acid a flavonoid isolated from Euphorbia hirta antagonizes gamma radiation induced radiotoxicity in lymphocytes in vitro.

The current study was executed to isolate and evaluate gallic acid from Euphorbia hirta for in vitro radioprotective potentials against gamma irradiation caused radiotoxicity in human lymphocytes. The defatted E.hirta plant material was treated to methanol extraction using the soxhlet device. Bioflavonoids were isolated from the E.hirta methanol extract using column chromatography. In human cells exhibited to gamma radiation, separated flavonoid gallic acid was examined for in vitro radioprotective potentials using the micronucleus test, DNA fragmentation assay, superoxide free radical scavenging method, and apoptic assay. The frequency of micronuclei was considerably declined when cells were preprocessed with gallic acid (25g/mL) before being exhibited to 2Gy gamma radiation, as determined by the cytokinesis blocked micronucleus test. Similarly, pre-gamma radiation treatment of human cells with gallic acid led in markedly less DNA injury, as assessed by comet metrics like olive tail moment and percent tail DNA. Gallic acid (25g/mL) given to lymphocytes prior to gamma irradiation considerably decreased the percentage of apoptotic bodies. Gallic acid also considerably lowered the reactive oxygen species concentrations elicited by gamma radiation. Our findings showed that gallic acid protects lymphocytes isolated from human blood from gamma radiation-induced DNA destruction and anti-apoptotic activity, which could be because of inhibition of free radicals formed by gamma radiation as well as the decline of gamma radiation-induced oxidative stress.

Physical Chemical Characterization, Determination of Antioxidant Activity and Phytochemical Screening of Gambir Claw Herbal Tea (Uncaria gambir)

Uncaria gambir is a member of Rubiaceae family. Information related to antioxidants and the use of this plant in the food and cosmetic industry has been widely reported. This study aims to determine the physicochemical properties, phytochemical content and antioxidant activity of herbal tea made from gambir claw, which was collected from the Pontianak City area of ​​West Kalimantan. Determination of physicochemical properties is based on measuring the parameters of pH, water content, ash content and organoleptic including taste, odor and color when dissolved in water. Phytochemical screening was carried out using specific reagents to determine the presence of flavonoid compounds, tannins, alkaloids and saponins. Antioxidant activity was determined using the free radical scavenging method 2,2-diphenyl-1-picrylhydrazyl (DPPH). From the results of the measurement of the physical and chemical properties of gambir claw herbal tea, the pH, ash content, moisture content and powder conditions met the requirements of SNI No 3836 of 2013, phytochemical screening showed positive results for flavonoid and tannin compounds, and antioxidant activity was obtained at 88,398 ppm, classified as a strong antioxidant.

Antioxidant Effect and Acute Oral Toxicity of Hot Springs.

According to the research, there are many illnesses for which therapeutic mineral hot springs are employed as an alternative. Its physicochemical characteristics have a substantial body of evidence. The in vivo antioxidant effect of Mosul's hot springs in Iraq has been investigated in the current investigation. An experimental design for toxicity, a control group, and a study group were created. In addition, in vivo antioxidant effect of the hot springs of Mosul, Iraq, has been studied by the lipid antiperoxidation method with (p < 0.05), in vitro by the free radical scavenging method (DPPH) for its complexing capacity of hot springs. In acute oral toxicity in vivo at fixed doses, looking for signs and symptoms of toxicity, there are no signs of intoxication or significant changes in the biochemical analysis (blood count). And, it was discovered that the variances are substantial. The animal was necropsied, and hematological and biochemical parameters were determined, as well as the organs' histological processing at the study's conclusion. It was found that the thermal waters from Mosul, Iraq, are medicinal mineral waters, chlorinated, sodium, and sulfated, nontoxic and have an antioxidant effect. With the help of the research's findings, it is hoped to provide scientific support for knowledge that, when made public, encourages the development of Mosul's hot springs as a safe and environmentally friendly tourist destination. With the results of this research, the parameters were presented with their mean and standard deviation statistics, promoting the ecological and sanitary tourism development of the Mosul hot springs, which will generate more significant income for the population, therefore growth in the region.

Genoprotective, antimutagenic, and antioxidant effects of methanolic leaf extract of Rhamnus alaternus L. from the Bissa mountains in Algeria

Rhamnus alaternus L. is a Rhamnaceae shrub and a popular traditional medicine in Algeria. The present research objective was to investigate the antioxidant, genotoxic, and antigenotoxic properties of R. alaternus methanolic leaf extract. &#x0D; Antiradical scavenging activity was tested by α, α-diphenyl-β-picrylhydrazyl free radical scavenging and β-carotene bleaching method. DNA damage and repair were measured by the Allium cepa test with sodium azide as a mutagenic agent. Mitotic index and chromosomal aberrations were calculated by microscopy of meristem roots stained with 2% carmine acetic. &#x0D; The methanolic extract of R. alaternus leaves inhibited the free radical DPPH (IC50 = 0.74 ± 0.30 mg/mL) and prevented the oxidation of β-carotene (50.71 ± 4.17%). The root phenotyping showed that sodium azide changed their color and shape, decreased their stiffness, and significantly reduced their length. The roots treated with both R. alaternus leaf extract and sodium azide demonstrated a better root growth. The roots treated with the methanolic extract were much longer than the control roots (P &lt; 0.001). The microscopy images of root meristem treated with the sodium azide mitodepressant agent showed significant chromosomal aberrations, which indicated a disruption of the cell cycle. &#x0D; The R. alaternus leaf extract appeared to have a beneficial effect on cytotoxicity. The antioxidant properties of R. alaternus L. makes this plant an excellent genoportector.

Evaluation of the Thrombolytic and Antioxidant Activity of Leaf Extracts of Plumbago zeylanica L.

Abstract: Background: Plumbago zeylanica L. is one of the extremely accessible conventionally used herbal plants with various biological activities. However, actions of P. zeylanica L on blood clotting and other complications of blood were indisposed therapeutically studied. Therefore, the scope of the current exploration is to screen the thrombolytic, antioxidant, and cytotoxic effects of leaf extracts. Materials and Methods: Thrombolytic activity (in vitro) was assessed with clot lysis and thrombin inhibitory ability. Further, thrombolytic activity (in vivo) was evaluated by a thrombotic tail (carrageenan-induced) animal model. DPPH and nitric oxide (free radical) scavenging methods were employed to check the in vitro antioxidant property. Further cytotoxicity and acute oral toxicity were assessed for plant extract. Results: The quantitative analysis elicits the presence of the magnificent amount of the total phenolic content (96.8±7.92 mg GAE/g) and total flavonoid content (63.52±4.54 mg QE/g) on the dry weight basis. The maximum clot lysis (96.83%±0.657) of methanolic leaf extract was detected in in vitro model at 800 μg/mL in 72 hr. A strong thrombin inhibition (94.63±2.12%) effect was observed for methanol leaf extract at 2 mg/mL. In in vivo studies a significant (p< 0.001) clot lysis was achieved at the tested dose (100, 200 and 300 mg/kg). DPPH radical and nitric oxide scavenging activity showed the IC50 value of 25.47±0.51 and 56.32±0.85, respectively. The methanolic extract was found safer up to the highest lethal dose of 2000 mg/kg. Conclusion: These findings suggested that the plant leaves are comprised of significant thrombolytic properties. It could be a promising source for the existence of antioxidant and thrombolytic agents. Keywords: Plumbago zeylanica L., Thrombolytic activity, Anti-oxidant activity, Cytotoxicity, Streptokinase, DPPH radical etc.

Physicochemical Analysis, in vitro Antioxidant and Antimicrobial Potential of Leaves of Bridelia montana (Roxb.) Willd

Aim: The aim of this particular study is to analyse the anti-oxidant and the anti-microbial potential of the leaves of an ethnomedicinal plant, Bridelia montana (Roxb.) Willd. which belongs to the family Phyllanthaceae. Materials and Methods: The physicochemical parameters of the powdered plant samples was analyzed by the methods suggested in the The Indian Pharmacopoeia (1996). The phytochemical constituents of the leaf extracts were studied, the anti-oxidant potential and the anti-microbial activity of the ethanol leaf extract was analysed using DPPH free radical scavenging method and agar well-diffusion method respectively. Results: The physicochemical analysis revealed that the sulphated ash was found to be the highest among all the other parameters and the moisture content was relatively less. The qualitative phytochemical analysis showed the presence of flavonoids, tannins, phenols, glycosides and alkaloids in their leaf extracts. In vitro antioxidant analysis showed that the ethanol leaf extract had good free radical scavenging activity when compared with standard Ascorbic acid. The in vitro antimicrobial analysis showed good zone of inhibition against most of the tested microorganisms in the concentration dependent manner. Conclusion: The present study showed that the ethanol extract of B. montana leaves has significant amount of phytochemicals, antioxidant and antimicrobial activity. Many biologically active secondary metabolites were present in the leaf extract which could be responsible for its therapeutic potential.

Fabrication, Characterization, and Antimicrobial Activity of Carvacrol-Loaded Zein Nanoparticles Using the pH-Driven Method.

To reduce the application of synthetic additives in the field of food preservation, this study utilized carvacrol as an antibacterial agent, and zein and sodium caseinate as carriers, to prepare composite nanoparticles loaded with carvacrol by the pH-driven method. The composite nanoparticles of zein/sodium caseinate had an excellent encapsulation efficiency (77.96~82.19%) for carvacrol, and it had remarkable redispersibility. The results of Fourier transform infrared spectroscopy showed that the formation of the composite nanoparticles mainly depended on the hydrogen bond and the hydrophobic zone force, and thermal gravimetric analysis showed that carvacrol was loaded successfully into nanoparticles, and loading efficiency reached 24.9%. Scanning electron microscopy showed that the composite nanoparticles were spherical, with a particle size range of 50~200 nm, and through the free radical scavenging method and the plate counting method to confirm the particle has stronger antioxidant and antibacterial properties, and with the composite nanoparticles with poly (vinyl alcohol) film applied to the preservation of banana together, it was found that PVA film containing 5 wt% CA-loaded composite NPs can significantly extend the storage period of banana. Therefore, when the composite nanoparticles were applied to food packaging, they could effectively inhibit food spoilage and lengthen the shelf life of food, which displays potential application prospects in the food industry.

Ekstrak Etanol Buah Jeluak (Microcos Tomentosa) sebagai Antioksidan dengan Metode DPPH

Indonesia is known as one of the largest medicinal plant user countries in the world. There are several plants that have potential as medicine, such as the Jeluak (Microcos tomentosa) plant. The purpose of this study was to determine the antioxidant activity of the ethanolic extract of Jeluak Fruit (Microcos tomentosa). The ethanol extract was obtained through the maceration method. Antioxidant testing was carried out by free radical scavenging method with 2,2-diphenyl-1-picrylhydrazyl (DPPH). The results of the study based on phytochemical screening tests showed that the ethanolic extract of jeluak fruit (Microcos tomentosa) contains secondary metabolites of alkaloids, saponins, flavonoids, and terpenoids. The results of the study based on antioxidant testing showed that the highest percentage of inhibition of Jeluak Fruit (Microcos tomentosa) at a concentration of 100 ppm was 92.22%. The IC50 value of the ethanolic extract of Jeluak Fruit (Microcos tomentosa) showed a very strong antioxidant activity of 4.34 ppm. Based on this research, it can be concluded that the ethanolic extract of Jeluak Fruit (Microcos tomentosa) has potential as an antioxidant.

Comparative Total Phenolic Content and Antioxidant Activity of Sida cardifolia, Abutilon indicum and Mesua ferrea

Background: Phenolic constituents of plant are the prime source of antioxidants. Natural antioxidant biomolecules become an emerging research area of this era because of their antioxidant potential. Accumulation of free radicals results in occurrence of many degenerative diseases and produced harmful effect on body. Research evidence proved that plant phenolic constituents have an antioxidant potential and has been used for the treatment of degenerative diseases. Therefore, an attempt was taken to investigate the antioxidant activity and total phenolic content of Sida cardifolia, Abutilon indicum and Mesua ferrea. Materials and Methods: Alcoholic, hydroalcoholic and water extracts of S. cardifolia, A. indicum and M. ferrea were prepared and total phenolic content was determined by Folin Ciocalteu method, and antioxidant activity was determined by DPPH free radical scavenging method. Results: Poly phenolic Result revealed that hydroalcoholic extracts of S. cardifolia, A. indicum and M. ferrea showed maximum phenolic content than the alcoholic and water extracts. In vitro Antioxidant study revealed that hydroalcoholic extract of S. cardifolia and M. ferrea showed optimum antioxidant activity while aqueous extract of A. indicum showed maximum antioxidant activity. Conclusion: Aqueous extract of A. indicum showed maximum antioxidant activity than hydroalcoholic extract of S. cardifolia and M. ferrea.

IN VITRO ANTICANCER, ANTIOXIDANT AND MOLECULAR DOCKING STUDIES OF 4-AMINOBENZAMIDE METAL COMPLEXES

Objective: Mixed ligand complexes of Cu(II) and Cd(II) with 4-aminobenzamide(4-ABZ) have been synthesized under microwave irradiation and they were characterized by elemental analysis, estimation of metal ion, molar conductivity, magnetic study, FT-IR, Far-IR, electronic spectra, NMR (1H and 13C) and EPR spectral studies. Methods: The data of microanalysis and metal estimation showed that the complexes have the composition of [M(L1)2(L2)2] for Cu(II) and [M(L1)(L2)2] for Cd(II) complex respectively. The conductivity data confirmed the neutral nature of the complexes. The tetrahedral geometry of the Cd(II) complex was confirmed using UV-Visible spectra. The tetragonally distorted octahedral stereochemistry of Cu(II) complex was further confirmed by UV and EPR spectral studies. The diamagnetic nature and probable geometry of Cd(II) complex were also confirmed using NMR spectral studies, which are also compared with free 4-aminobenzamide. The in vitro bio-potential activities of 4-ABA and Cd(II) complex were screened for E. coli and C. Albicans microorganisms by Agar disc diffusion methods. Results: The cancer study of Cu(II) complex and antioxidant activity of DPPH free radical scavenging method of Cd(II) complex were measured and compared with 4-aminobenzamide and standard drugs. The breast cancer studies were also identified using the targeted proteins viz., BRCA1, PR and EGFR by molecular docking study. Conclusion: In the present study, we synthesized new metal complexes of Cu(II) and Cd(II) with 4-ABA and nitrite ion by microwave irradiation method. The analytical data show that the metal-ligand stoichiometry they are non-electrolytes in acetonitrile solution. The spectral data show that the synthesized ligand binds with metal ions through the nitrogen atom of the 4-ABA and oxygen atoms of the nitrite ion.

Antioxidant potential and antiangiogenic activity of Tetraselmis suecica grown in a semicontinuous culture

AbstractBACKGROUNDA main advantage of microalgae cultivation is its capacity to produce metabolites of biotechnological interest through modification of growth conditions. The aim was to evaluate the effect of strontium addition (Sr) to the culture medium and culture scale‐up of Tetraselmis suecica on antioxidant capacity and antiangiogenic activity.RESULTSAntiradical activity in extracts through the DPPH (α, α‐diphenyl‐β‐picrylhydrazyl free radical) scavenging method was higher for a 5‐L reactor (81.9 ± 2.5%) than for a 80‐L reactor (60 ± 4.6%), and through the TEAC (Trolox equivalent antioxidant capacity) method, the activity measures were 1.38 ± 0.05 and 1.12 ± 0.05 mmol Trolox, respectively. Lipid peroxidation β‐carotene bleaching reached the highest activity coefficients for the 80‐L reactor (ethanol extract 724 ± 35 AAC). Antioxidant activity was similar with and without Sr, although it was affected by the scale‐up. Extractable solids were maximized in the 80‐L reactor (350 ± 6 mg g−1 for methanol–water), whereas phenolic compounds were higher for ethanol extracts (5.5 ± 0.1 mg GAE g−1 for 5‐ and 80‐L reactors, without Sr addition). The antiangiogenic activity was improved in the methanol extract by ≈50% more than the negative control.CONCLUSIONThe antioxidant activity of T. suecica biomass can be improved using different culture scale‐ups and solvents during extraction, increasing the production of natural sources of antioxidant and antiangiogenic compounds for their use in food, health and cosmetics. © 2022 Society of Chemical Industry (SCI).

The Effect of In Vitro Gastrointestinal Digestion on the Antioxidants, Antioxidant Activity, and Hypolipidemic Activity of Green Jujube Vinegar.

Healthy fruit vinegar has been extensively favored in China in recent years. As a new type of fruit vinegar developed by our laboratory, green jujube vinegar has the characteristics of good taste and rich nutrition. To study the effect of in vitro gastrointestinal digestion on the antioxidant and hypolipidemic activity of green jujube vinegar, so as to provide basic data for research and the development of healthy food antioxidants, including the total phenolic content (TPC), total flavonoid content (TFC), total acid content, and volatile acid content, were measured. The antioxidant activity was measured by using 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) free radical scavenging methods and the ferric reducing antioxidant power assay (FRAP), and the hypolipidemic activity was measured by cholesterol adsorption and the sodium cholate adsorption capacities. The results show that gastric digestion significantly (p < 0.05) decreased the TPC, TFC, total acid content, and volatile acid content, for which the highest reductions were up to 54.17%, 72%, 88.83% and 82.35%, respectively. During intestinal digestion, the TFC remained at a high level and unchanged, and the TFC and volatile acid content significantly (p < 0.05) decreased by 72.66% and 89.05%, respectively. The volatile acid content did not significantly (p > 0.05) change within 2 h. The ABTS free radical scavenging ability and the reducing power free radical scavenging rate were correlated with the TPC, TFC, and total acid contents, and the DPPH free radical scavenging ability and cholesterol adsorption capacity were not. These findings suggest that green jujube vinegar can be a potential functional food for people’s use.

Analysis of total phenolic contents, flavonoids, antioxidant and antibacterial activities of Croton macrostachyus root extracts

Plants are good sources of various bioactive substances and have significant importance for the discovery of new drugs. In this study, Croton macrostachyus plant roots from six different sites in the Central Gondar Zone, Ethiopia, were collected; and their phenolic and flavonoid contents, as well as antioxidant and antibacterial activities were investigated. Total phenolics and flavonoid contents of the root extracts were determined by the Folin–Ciocalteu and aluminum chloride methods, respectively. The antioxidant activity was determined by the DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging method. Moreover, the antibacterial activities were evaluated by disk diffusion method. Results revealed that total polyphenols and flavonoid contents were in the range of 802 ± 53–1557 ± 75 mg GAE/100 g and 342 ± 26–745 ± 32 mg CE/100 g, respectively. Root extracts of C. macrostachyus were found to have higher antioxidant activities ranging from 3.53 ± 0.38 to 6.38 ± 0.62 mg AAE/g sample. They also showed inhibition zones of 5.8, 6.2, 5.9 and 6.0 mm for Staphylococcus aurous, Staphylococcus pneumonia, Escherichia coli and Klebsiella pneumonia, and had equivalent potency with the reference Gentamicin antibiotic. Pearson correlation result indicated a strong relationship between total polyphenol contents and their respective antioxidant activities. This study articulates that the root extracts accumulated a substantial quantity of polyphenols and bears a considerable antioxidant activity.

Assessment of Phenolic and Flavonoid Contents, Antioxidant Properties, and Antimicrobial Activities of Stocksia Brahuica Benth

Introduction: Stocksia brahuica Benth. (Sapindaceae) is an invaluable shrubby plant distributed in Iran, Afghanistan, and Balochistan region of Pakistan. In this study, the total phenolic and flavonoid contents and the antioxidant and antimicrobial properties of leaf, fruit, and seed extracts of S. brahuica were screened. Methods: Plant materials were collected in September 2021 from Zahedan, southeast of Iran. The total phenolic and flavonoid contents and total antioxidant capacity were assessed spectrophotometrically using Folin-Ciocalteu, aluminum chloride colorimetric, and DPPH free radical scavenging methods, respectively. The effectiveness of crude hydroethanolic extracts of the leaf, fruit, and seed of Stocksia brahuica were also assayed against four gram-negative (Pseudomonas aeruginosa, Klebsiella pneumoniae, Acinetobacter baumannii, and Escherichia coli) and two gram-positive bacteria (Staphylococcus epidermidis and Streptococcus pyogenes) as well as two fungi (Aspergillus fumigatus and Candida albicans). Results: The total phenolic and flavonoid contents were observed to vary from 136.7 to 263.5 mg gallic acid equivalents/g and 26.6 to 104.8 mg quercetin equivalents/g of powdered dry weight. The highest amounts of phenolic and flavonoid content were detected in leaves. Good antioxidant activities were observed with leaves followed by fruits and seeds. Based on our antimicrobial experiments, some plant organs were successful in blocking the growth of tested pathogenic strains. Conclusion: As a result, natural products derived from this plant can make a significant contribution to the development of the nutritional and pharmaceutical industries.

Evaluation of antioxidant activity of nano- and microencapsulated rosemary (Rosmarinus officinalis L.) leaves extract in cress (Lepidium sativum) and basil (Ocimum basilicum) seed gums for enhancing oxidative stability of sunflower oil.

There has been interest in the use of plant extract as a natural preservative agent for improving the oxidative stability of vegetable oils. However, plant extracts have low stability against heat and environmental stress. In this study, the antioxidant potential of nano‐ and microencapsulated Rosmarinus officinalis L. extract (RE) obtained using the ultrasonication method was measured. The total phenolic and flavonoid content of the extract was 174.4 ± 25.9 mg gallic acid/g extract and 78.30 ± 3.2 mg rutin/g extract, respectively. Antioxidant activity of 50, 100, 200, and 400 ppm of RE was measured by DPPH free radical scavenging methods, ferric reduction assay, and β‐carotene/linoleic acid assay, and then compared to the 100 ppm of TBHQ as a common synthetic antioxidant. The results showed that the antioxidant activity increased with increasing the concentration of the extract in all evaluating methods. The antioxidant activity of 200 ppm of the free and encapsulated extract in cress (Lepidium sativum) and basil (Ocimum basilicum) seed gums at different ratios (1:0, 1:1, and 0:1) was compared to sunflower oil without antioxidants, and oil‐containing TBHQ which was stored at 60°C for 24 days. The oxidation indexes of oil samples include peroxide value, thiobarbituric acid value, and p‐anisidine value measured at 4‐day intervals. A lower oil oxidation was observed in oil‐containing nanoencapsulated extract followed by microencapsulated extract, free extract, and TBHQ. Since producing nanoencapsulated RE requires a higher time and speed of homogenization and due to no statistically significant difference between the antioxidant properties of nanocapsules and microcapsules in oil, the use of microcapsules of RE in basil seed gum to increase the shelf life of sunflower oil is recommended.

Impact of cooking on the bioactive compounds and antioxidant activity of gherkin (Cucumis anguria L.)

Despite the high consumption of Japanese gherkin in the Northeast of Brazil, very few studies with this vegetable are found in the literature. As it is consumed raw or after cooking, being mainly consumed cooked, there was the interest to know if cooking could influence bioactive compounds content and antioxidant activity since high temperatures are related to benefits losses in food. This research aimed to compare the content of bioactive compounds and the antioxidant activity between in natura and cooked Japanese gherkin. Gherkins were submitted to quantification of carotenoids, anthocyanins, vitamin C and phenolic compounds, in addition to the antioxidant activity analyses through the ferric reducing antioxidant power (FRAP) and the DPPH free radical scavenging methods. After cooking, carotenoids (from 4.90 to 4.59 ?g.g-1) and phenolic compounds (from 17.07 to 14.95 mg.100 g-1) content decreased, but with no significant difference between in natura and cooked samples. As for the antioxidant activity, the in natura gherkin showed a higher value (3.31 ?M Ferrous Sulfate.g-1) than the cooked one (1.96 ?M Ferrous Sulfate.g-1) for FRAP method, while for DPPH method no difference between the samples was detected. Anthocyanin and vitamin C were not detected in gherkins. We concluded that, in general, cooking did not affect the bioactive compounds of gherkins and that antioxidant activity increased.

Quantitative Phytochemical Analysis and in vitro Study of Antioxidant and Anti-inflammatory Activities of Aegle marmelos Fruit with Peel and without Peel: A Comparative Evaluation

Background: Aegle marmelos is an important ethnomedicinal plant that is found commonly in India and other Asian countries. The peel of the fruit is hard and is often discarded as waste. However, a few studies have shown that even the peel has antioxidant and anti-inflammatory attributes. The aim of this research work was to perform a comparative evaluation of Aegle marmelos fruit extracts with the peel (whole fruit) and without the peel. Phytochemical investigations were carried out on the two extracts. Materials and Methods: The Folin-ciocalteu reagent method and the aluminum chloride colorimetric method were used to determine the total phenolic contents and total flavonoid contents, respectively. The marmelosin content was measured using the high-performance thinlayer chromatography technique. The antioxidant activity was determined in-vitro using the free-radical scavenging method, and the in vitro antiinflammatory property was determined using the egg albumin denaturation method. The unpaired t-test (with Welch’s correction) was used to determine P values. Any differences that were observed were considered significant if P &lt; 0.05. Results: The total flavonoid content of the extracts was found to be low, while the total phenolic content was high. There were no significant differences in the antioxidant activities of the extracts. The anti-inflammatory activities and marmelosin contents of the extracts were significantly different. Conclusion: The extracts displayed good antioxidant and anti-inflammatory activities. The anti-inflammatory activity of the extract of the fruit without the peel was found to be greater than that of the extract of the fruit with the peel.

Artemisia absinthium L. Aqueous and Ethyl Acetate Extracts: Antioxidant Effect and Potential Activity In Vitro and In Vivo against Pancreatic α-Amylase and Intestinal α-Glucosidase.

Artemisia absinthium L. is one of the plants which has been used in folk medicine for many diseases over many centuries. This study aims to analyze the chemical composition of the Artemisia absinthium ethyl acetate and its aqueous extracts and to evaluate their effect on the pancreatic α-amylase enzyme and the intestinal α-glucosidase enzyme. In this study, the total contents of phenolic compounds, flavonoids, and condensed tannins in ethyl acetate and the aqueous extracts of Artemisia absinthium leaves were determined by using spectrophotometric techniques, then the antioxidant capacity of these extracts was examined using three methods, namely, the DPPH (2, 2-diphenyl-1picrylhydrazyl) free radical scavenging method, the iron reduction method FRAP, and the β-carotene bleaching method. The determination of the chemical composition of the extracts was carried out using high-performance liquid chromatography—the photodiode array detector (HPLC-DAD). These extracts were also evaluated for their ability to inhibit the activity of the pancreatic α-amylase enzyme, as well as the intestinal α-glucosidase enzyme, in vitro and in vivo, thus causing the reduction of blood glucose. The results of this study showed that high polyphenol and flavonoid contents were obtained in ethyl acetate extract with values of 60.34 ± 0.43 mg GAE/g and 25.842 ± 0.241 mg QE/g, respectively, compared to the aqueous extract. The results indicated that the aqueous extract had a higher condensed tannin content (3.070 ± 0.022 mg EC/g) than the ethyl acetate extract (0.987 ± 0.078 mg EC/g). Ethyl acetate extract showed good DPPH radical scavenging and iron reduction FRAP activity, with an IC50 of 0.167 ± 0.004 mg/mL and 0.923 ± 0.0283 mg/mL, respectively. The β-carotene test indicated that the aqueous and ethyl acetate extracts were able to delay the decoloration of β-carotene with an inhibition of 48.7% and 48.3%, respectively, which may mean that the extracts have antioxidant activity. HPLC analysis revealed the presence of naringenin and caffeic acid as major products in AQE and EAE, respectively. Indeed, this study showed that the aqueous and ethyl acetate extracts significantly inhibited the pancreatic α-amylase and intestinal α-glucosidase, in vitro. To confirm this result, the inhibitory effect of these plant extracts on the enzymes has been evaluated in vivo. Oral intake of the aqueous extract significantly attenuated starch- and sucrose-induced hyperglycemia in normal rats, and evidently, in STZ-diabetic rats as well. The ethyl acetate extract had no inhibitory activity against the intestinal α-glucosidase enzyme in vivo. The antioxidant and the enzyme inhibitory effects may be related to the presence of naringenin and caffeic acid or their synergistic effect with the other compounds in the extracts.

Test of Antioxidant And Antibacterial Activity of Ethanol Extract of Andaliman Fruit (Zanthoxylum Acanthopodium Dc.) With Dpph (1.1-Diphenyl-2-Picrylhydrazil) Trapping Method And Minimum Inhibitory Concentration

Utilization of bioavailability according to World Health Organization (WHO) records is very large, it is estimated that almost 80% of mankind, especially in developing countries, still use plants as medicinal ingredients to maintain their health (Nugraheni, 2007). Andaliman (Zanthoxylum acanthopodium DC.) which belongs to the Rutaceae tribe which is one of the plants known to the Batak community, is classified as a wild plant and is a typical plant of Province North Sumatra. The method used in this research is experimental research. The research included collecting and processing andaliman fruit, making simplicia, making ethanol extracts, and examining antioxidant activity tests using the DPPH free radical scavenging method (1,1-diphenyl-2-picrylhydrazil) and antibacterial activity using the minimum inhibitory concentration method. The results of the antibacterial activity test of the ethanolic extract of andaliman fruit showed that the extract had antibacterial activity in the moderate category at a concentration of 300 mg/ml with an inhibition zone of 10.17 mm for Staphylococcus aureus bacteria and a moderate category for Staphylococcus epidermidis bacteria with an inhibition zone of 10.80 mm. The ethanol extract of andaliman fruit can inhibit Staphylococcus aureus and Staphylococcus epidermidis, effective at a concentration of 300 mg/ml with inhibitory diameters of 10.17 mm and 10.80 mm, respectively.

Testing Antioxidant And Antibacterial Activity Of Andaliman Fruit (Zanthoxylum Acanthopodium Dc.) Ethanol Extract With Abts Method (2,2'-Azino-Bis(3-Ethylbenz-Thiazoline-6-Sulfonic Acid) And Minimum Resistant Concentration

Antioxidants are chemical compounds that can donate one or more electrons to free radicals, so that these free radicals can be quenched. There are two sources of antioxidants, namely natural and synthetic antioxidants. Andaliman (Zanthoxylum acanthopodium DC.) is one of the many spice plants found in Toba Samosir and North Tapanuli Regencies, North Sumatra. Andaliman plants grow at an altitude of 1,500 m above sea level. Apart from North Sumatra. This research using method experimental research when collecting and processing andaliman fruit, making simplicia, making ethanol extracts and examining antioxidant activity tests using the ABTS free radical scavenging method (2,2'-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) and antibacterial activity. using the minimum inhibitory concentration method. Testing the antioxidant activity of the ethanol extract of andaliman fruit with the ABTS method using a UV-VIS spectrophotometer with a wavelength of 734 nm. the regression equation (y = 0.4619 + 20.226) obtained an IC50 value of 64.4598 mg/mL which can be classified as a strong antioxidant activity. The results of the antibacterial activity test of the ethanol extract of the andaliman fruit showed that the extract had antibacterial activity in the moderate category at a concentration of 300 mg/ml with an inhibition zone of 10.