Thymus praecox subsp. polytrichus: Antimicrobial and antidiabetic activity of ethanol extracts

This investigation was conducted to compare the antimicrobial properties of alcohol fruit extracts from Apple (Malus pumila), Guava (Psidium guajava), and Pineapple (Ananas comosus) against eight bacteria: Staphylococcus aureus, Enteroaggregative E.coli (EAEC), Enterotoxigenic E.coli (ETEC), Enterobacter cloacae, Shigella flexineri, Enterococcus faecalis, Klebsiella, and Pseudomonas aeruginosa. All the fruits were bought fresh from the market, cut into small cubes, and sun dried to a crisp over 4-5 days. After being blended to a fine powder, 75g of each powder was passed through a Soxhlet apparatus containing 250 ml of 99% ethanol to obtain a crude extract. This process was repeated with 250 ml of methanol to obtain a methanolic crude extract. The antimicrobial properties of the extracts were tested using agar well diffusion, Norfloxacin used as positive control and water as negative control. The inhibition zones from each extract were measured and an activity index was calculated from the mean zone sizes. All fruits showed some degree of antimicrobial properties with the highest activity index (2.6) being from Pineapple ethanolic and methanolic extracts against EAEC. Both Apple ethanolic and methanolic extracts showed activity only against Staph. aureus and EAEC. Guava extracts were effective against all the strains except for ETEC. Pineapple extracts were strongly active against all the bacteria. The methanolic extracts of Apple and Guava showed slightly larger zones compared to their ethanolic extracts. For Pineapple, inhibition zones from the ethanolic extracts were slightly larger. The results of this investigation show great promise for potential antimicrobial drugs.

Introduction: The bioactive constituents found in herbal medicines play a crucial role in their therapeutic effects. Crataeva nurvala is a well-known medicinal plant, traditionally used for the treatment of kidney and bladder-related ailments. In Ayurveda, its bark has been employed for over 3,000 years as a natural remedy for various kidney disorders. Objective: In this research article, the ethanolic bark extract of Crataeva nurvala was characterized through physical evaluation, preliminary phytochemical screening, LCMS, FT-IR, and HPTLC analyses, along with assessments of its antioxidant and antimicrobial activities. Methods: The extraction process was performed using petroleum ether, and 150g of weighed Crataeva nurvala powdered bark was carried out in a Soxhlet apparatus for 36 hours. The extraction was completed by putting one drop from a thimble onto a filter paper that exhibited no oil spots. The bark marcs were removed and allowed to dry before being individually exposed to a 24-hour hot extraction process using 90% ethanol in a soxhlet apparatus. The solvent was vaporized and concentrated to produce a dry residue after the extraction. Results: LC-MS analysis identified several major phytoconstituents in the ethanolic extract, including scoulerin, formononetin, L-carnosine, resveratrol, flavanone, quercetin, kaempferide, rhamnetin, daidzein, and isorhamnetin. FT-IR spectroscopy revealed characteristic peaks corresponding to various functional groups present in the extract. HPTLC studies confirmed the presence of active compounds, such as lupeol and gallic acid. Phytochemical screening of Crataeva nurvala bark extract further detected saponins, glycosides, alkaloids, anthraquinones, flavonoids, and tannins. This study also demonstrated notable antioxidant and antimicrobial activities associated with the plant extract. Conclusion: It can be concluded that Crataeva nurvala bark contains numerous bioactive compounds, making it a valuable plant for phytopharmaceutical applications. The ethanolic extracts of Crataeva nurvala bark demonstrated significant antioxidant and antimicrobial activities. For the first time, LC-MS and HPTLC analyses revealed high contents of L-anserine nitrate, resveratrol, flavanone, chlorogenic acid hemihydrate, quercetin, kaempferide, isorhamnetin, rhamnetin, gallic acid, and lupeol, which likely contribute to these biological effects. Additionally, the study suggests that the ethanolic extract may possess antibiotic, anti-inflammatory, antibacterial, antioxidant, antidiabetic, anticancer, and anti-obesity properties due to the presence of 16 phytochemical compounds identified by LC-MS. Fluorescent analysis of the bark powder showed characteristic coloration upon exposure to various chemical reagents, supporting the presence of diverse phytochemicals. Preliminary phytochemical screening further confirmed the presence of saponins, alkaloids, flavonoids, anthraquinones, glycosides, and tannins in the ethanolic bark extract.

Poliomintha longiflora is a Mexican oregano, which has not been widely studied. This work aimed to describe the chemical composition, antimicrobial and antioxidant activities present in P. longiflora essential oil (EO), the hydrosol from EO extraction and extracts from waste solid residues (WSRs), identified as ethanol extract, ethyl acetate extract and the subfractions of ethanol and ethyl acetate extracts. The chemical characterization of the EO, hydrosol and WSR extracts was performed by GC–MS and HPLC. Their antioxidant activity was evaluated using two methods, and their antimicrobial activity was evaluated against Escherichia coli, Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus, and Salmonella Typhimurium. Thirty-one chemical components were identified in the EO. The subfractions from the ethanol and ethyl acetate extracts contain methylmaleic anhydride, thymoquinone, thymol, carvacrol, thymol acetate, carvacrol acetate, and phenolic acids. The EO presented the highest biological activities for antioxidant (136.05 mg equivalent of ascorbic acid/g (AAE/g); IC50 83.70 μg/mL of 2, 2-diphenyl-1-picrylhydrazyl (DPPH)) and antimicrobial tests (minimal inhibitory concentration (MIC) value of 250–750 mg/L), while the hydrosol and the ethyl acetate extract from WSRs had the lowest antioxidant activity (14.16 and 12.29 mg AAE/g respectively), and the hydrosol had the lowest antimicrobial activity (MIC of 3000 mg/L). The data suggest that Mexican oregano P. longiflora hydrosol and extracts from waste solid residues can still have compounds with antimicrobial and antioxidant capacities.

The increasing failure of chemotherapeutics and antibiotic resistance exhibited by pathogenic microbial infectious agents has lead to the screening of several medicinal plants for their potential antimicrobial activity. The medicinal properties shown by different medicinal plants are due to the phytochemicals present in the plant. These phytochemicals are the most vital sources for the treatment of destructive diseases. Different phytochemicals have an extensive range of activities, which helps to enhance the immune system and give resistance against long term disease to protect the body from harmful pathogens. To determine the antibacterial activity of <i>Citrus sinensis</i> and <i>Solanum lycopersicum</i> on wound isolated from Hospitals in Kaduna Metropolis Kaduna Nigeria was the main purpose of this study. Ethanolic and aqueous extracts of powdered <i>C. sinensis</i> peel and fresh fruit of <i>S. lycopersicum</i> were used for the qualitative measurement of various phytochemicals present in these plants. The phytochemical screening of the extracts yielded positive results for carbohydrates, glycosides, cardiac glycosides, saponins, triterpene, tannins, flavonoids and alkaloids. Wound swab samples of patients from five (5) selected hospitals within Kaduna metropolis yielded <i>Bacillus cereus, Myroides Species</i> and <i>Staphylococcus lentus</i>. The <i>Citrus sinensis</i> ethanolic and aqueous extracts as well as the <i>Solanum lycopersicum</i> ethanolic and aqueous extracts demonstrated a broad spectrum antibacterial activity against the three pathogenic bacteria of wound origin. The result of the tests indicate that orange peel ethanolic extract, tomato aqueous extract and tomato ethanolic extract showed the highest inhibition against <i>Bacillus cereus</i> 22mm, 20mm and 15mm respectively while highest inhibition of orange peel aqueous extract 19.5mm was recorded for <i>Myroides spp</i>. Lowest inhibition of tomato aqueous extract and tomato ethanolic extract were recorded for <i>Staphylococcus lentus</i> 15.2mm and 13.17mm respectively. Orange peel ethanolic extract and orange peel aqueous extract did not inhibit the growth of <i>Bacillus cereus</i> and <i>Staphylococcus lentus</i> respectively. Extracts which exhibited high activities against one or several pathogenic wound isolates were further assayed for minimum inhibitory concentration (MIC). The present study concludes that orange peel ethanolic, tomato aqueous and tomato ethanolic extracts showed highest antibacterial activity against the organism <i>Bacillus cereus</i> while orange peel aqueous showed highest antibacterial activity against <i>Myroide spp</i>. and there was a significant difference in the level of inhibition among the organisms isolated.

This study aimed to determine the antimicrobial activity of ethanol-extracts obtained from Ocimum gratissimum L. (clove or African basil, Lamiaceae) and O. santum L. (holy basil) against some microorganisms present in oral cavity related to either medical or dental disease. Antimicrobial properties of both ethanol-extracts of Ocimum species against Streptococcus mutans KPSK2, S. pyogenes ATCC 19615, Staphylococcus aureus ATCC 16794, and Candida albicans ATCC 10231 were primarily determined by agar disk diffusion method. The minimum inhibitory concentration (MIC) and minimum bactericidal or fungicidal concentration (MBC or MFC) of these herbal extracts were further determined by broth micro-dilution method. Ethanol-extracts of O. sanctum L. and O. gratissimum L. inhibited the growth of all tested microorganisms in various degrees ranging from the strongest antimicrobial activity of O. sanctum against S. pyogenes [MIC at 0.19% (w/v); MBC at 0.78% (w/v)] to the least inhibitory activity of O. gratissimum against C. albicans [MIC at 12.5% (w/v); undetectable MFC]. The ethanol-extract of O. sanctum showed stronger antimicrobial property against the tested bacteria and fungus than O. gratissimum. The ethanol-extracts of both Ocimum species showed stronger antibacterial than antifungal activity. However, the ethanol-extract of O. gratissimum even at a high concentration of 50% (w/v) was unable to eliminate the tested fungus. Ethanol-extracts of Ocimum species contain effective antibacterial and antifungal properties that may be beneficial for further development of antimicrobial agents in medical and dental fields.

Aims: To determine the antimicrobial and antioxidant potentials of some readily available plant leaves in order to source for alternate antioxidants and antibiotics. Study Design: Randomized complete block design. Place and Duration of Study: Department of Food Science and Technology, Federal University of Technology Akure Nigeria between Feb 2010 and Jan 2011. Methodology: Ethanol, hexane and water extracts from leaves of Anacardium occidentale (cashew), Cocos nucifera (coconut), Citrus sinesis (sweet orange), Citrus limon (lemon) and Carica papaya (pawpaw) were prepared and screened for their antioxidant and antimicrobial properties. The total phenolic content (TPC) was determined by folin-Ciocalteu assay. Antioxidant property of the plant extracts were evaluated using inhibition of free radical 2, 2diphenyl-2-picryl hydrazyl (DPPH). The antimicrobial activity of the extract against microorganisms (Acinetobacter spp., Bacillus cereus, Escherichia coli, Shigella dysenteriae, Staphylococcus aureus, Salmonella typhi, Aspergillus niger and Aspergillus flavus) was determined using modified agar-well diffusion method. Results: Total phenol content (TPC) of leaf extracts based on tannic acid equivalent revealed that the TPC of cashew leaf ranged from 2.21 to 7.49 mg TAE/g, coconut leaf Research Article European Journal of Medicinal Plants, 3(3): 465-473, 2013 466 extract (0.59-2.22 mg TAE/g), lemon leaf extract (0.97-3.9 mg TAE/g), sweet orange (0.54-0.69 mg TAE/g) and pawpaw leaf extract (0.220.36mgTAE/g). At 0.2mg/ml concentration, the highest antioxidant activity was observed from hexane extracts (45.03%-76.05%) followed by water extracts (45.82% -71.7%) and ethanol extracts (32.75%-56.79%). Ethanol extract (0.2mg/ml) from A. occidentale and C. papaya showed antimicrobial activity against all the eight microorganisms tested with inhibition zones ranging from 2-12 mm. The highest inhibition zone of 12mm was observed in A. occidentale leaf against Shigella dysenteriae while C. limon leaf had the lowest inhibition zone of 2 mm against B. cereus. Conclusion: We may conclude that A. occidentale and C. papaya leaves demonstrated broad spectrum activities. The results provided evidence that the plant leaves investigated in this study might indeed be potential sources of natural antioxidant and antimicrobial agents if further investigated.

Background: Cladogelonium madagascariense Leandri is a single genus, single species endemic plant of Madagascar. The aerial parts are used to treat the fevers with grippe symptoms and neurological signs by steam bath. The aim of this study was to evaluate its antimicrobial activity, isolate and identify its phytochemical constituents. Methods: The aerial parts of the plant were collected, shade-dried, and pulverized into a fine powder. Preliminary phytochemical screening of the crude ethanol extract was conducted using standard qualitative methods. The antimicrobial activity was evaluated using the disk-diffusion method with the ethanolic extract. Sequential extraction of aerial parts powder was performed by maceration using solvents of increasing polarity: hexane, ethyl acetate, and methanol. Chromatographic separation of the extracts was performed, and compounds isolated from the hexane extract were identified using nuclear magnetic resonance (NMR) spectroscopy and by comparison with literature data. Results: The screening phytochemical analysis of Cladogelonium madagascariense Leandri revealed the presence of flavonols, leucoanthocyanins, triterpenes, steroids, unsaturated sterols, tannins, and saponins in ethanolic extract. Antibacterial study of this species revealed that was active against the six Gram-positive and Gram-negative bacteria: Bacillus cereus, Bacillus megaterium, Listeria monocytogenes, Enterobacter cloacae, Salmonella enteritidis and Streptococcus pneumoniae using disc diffusion method at the concentration of 2 mg/disc. Fractionation of the hexane extract led to the isolation of five known triterpenes: lupeol (1); glut-5-en-3α-ol (2); friedelin (3); alstrinine (4) and hederagenin (5). Conclusion: These findings demonstrate the presence of tetracyclic triterpenes in the hexane and ethyl acetate extracts of Cladogelonium madagascariense aerial parts. The ethanol extract exhibit antimicrobial activity. These results highlight the potential of this plant for use in phytomedicine.

This study was designed to evaluate the antimicrobial potentials of ethanol and aqueous extracts of Moringa oleifera against microorganisms isolated from beef offal. The beef offal samples (liver, kidney and intestine) were purchased from an abattoir in Port Harcourt while the Moringa oleifera leaves were harvested from the farm, Rivers State University of Science a nd T echnology, Port Harcourt. Plating was done using the spread plate method while test for inhibitory potential was done using disc diffusion method. Six species of bacteria ( Bacillus cereus, Staphylococcus aureus, Escherichia coli, Streptocccus spp , Pseudomo nas aeruginosa and Proteus vulgaris ) and two mould species ( Rhizopus spp and Mucor spp ) were identified. Antimicrobial potentials of the ethanol and aqueous extracts of M . oleifera on isolates were tested at various concentrations (50, 100, 200 and 400 mgm l - 1 ). Ethanol extract of M. oleifera showed strong antimicrobial activity and concentration dependent inhibitory effect on beef offal isolates while the aqueous extract was ineffective on test bacteria isolates. At a concentration of 400 mg/ml, zones of in hibition recorded were highest with ethanol extracts for Staphylococcus aureus (14.00 ±0.6 mm), Bacillus cereus (13.00± 0.1 mm) and

Infection diseases are a worldwide important problem for medicine and pharmacy. Today, there is a high interest in the evolution of new antimicrobial drugs due to the increasing percentage of resistant bacteria and fungi strains. Green tea leaf contains a variety of natural compounds that are possible to apply in the creation of new antimicrobial drugs. The aim of the work was to compare phytochemical composition, antimicrobial, antifungal activities of lipophilic and ethanolic green tea leaf extracts. Materials and methods. The object of the research was the lipophilic extract obtained using chloroform, along with two ethanolic extracts of green tea leaves. One of the ethanolic extracts had been previously processed with chloroform, while the other had not. Antioxidant activity was determined by the potentiometric method, while antimicrobial and antifungal activities were assessed by the “wells” method. Results. The lipophilic extract of green tea leaves contains predominantly caffeine and organic acids, with the lowest amount of phenolic compounds. In contrast, the ethanolic extracts show the opposite pattern, with phenolic compounds predominating and caffeine present in lower quantities. The lipophilic extract exhibits greater inhibition of the growth of S. aureus, E. coli, P. vulgaris, B. subtilis, and C. albicans compared to the 96 % ethanolic extract processed with chloroform, with inhibition rates of 19 %, 18 %, 12 %, 12 %, 16 %, and 20 % respectively. When comparing antimicrobial activity to the 96 % ethanolic extract without chloroform treatment, the results remained consistent. The antioxidant activity of the lipophilic extract was 58.7 and 60.0 times lower than that of the 96 % ethanolic extract processed with chloroform and the 96 % ethanolic extract without treatment, respectively. Conclusions. The study revealed that the lipophilic extract exhibited greater inhibition of the growth of both Gram-positive and Gram-negative bacteria as well as fungi compared to the ethanolic extracts. However, it showed a lower level of antioxidant activity. It is hypothesized that caffeine, organic acids, and catechins may interact synergistically to enhance the antimicrobial and antifungal activity of green tea leaf extracts. The lipophilic extract shows promise for further development in the production of antimicrobial and antifungal drugs.

Objective: It has been well documented that traditional medicinal plants confer considerable antimicrobial activity against various microorganisms.Methods: The present study was designed to evaluate the antimicrobial properties of aqueous and ethanolic extracts of the leaves of Syzygium caryophyllatum against Staphylococcus aureus, Escherichia coli, Salmonella typhi, Shigella flexneri, and Vibrio cholerae. The aqueous extract was prepared using cold percolation method, and ethanolic extract was prepared in Soxhlet apparatus using ethyl alcohol. Antimicrobial activity is being determined by time-kill assay and minimum inhibitory concentration.Results: From our study, it is found that all tested organisms were sensitive to both aqueous and ethanolic extract of leaves of S. caryophyllatum. The ethanolic extract showed better antibacterial activity against S. aureus and S. typhi when compare to aqueous extract. The phytochemical analysis confirmed the presence of flavonoids, alkaloids, glycosides, steroids, phenols, tannins, and saponins in the ethanolic and aqueous extract of S. caryophyllatum. Conclusion: We hypothesize that these active phytoconstitutents might be responsible for the antimicrobial activity of this plant.

The study was planned to evaluate the in vitro antibacterial activity and minimum inhibitory concentration (MIC) of cinnamon (Cinnamomum zeylanicum) bark powder ethanolic and aqueous extracts. Screening of cinnamon powder ethanolic and aqueous extracts for antibacterial sensitivity and MIC against Staphylococcus aureus, Streptococcus agalactiae, Bacillus cereus, Listeria monocytogenes, Escherichia coli and Pseudomonas aeruginosa was carried out. ABST was performed by the disc diffusion method. The cinnamon powder ethanolic and aqueous extracts were suspended in a solution containing 10% dimethyl sulfoxide and 0.5% tween 80. Under aseptic condition, empty sterilized discs were impregnated with 50 μl of different concentrations (50%, 25%, 12.5%, 6.25% and 3.12%) of the cinnamon powder ethanolic and aqueous extracts and placed on the agar plate surface. Paper disc moistened with vehicle (DMSO plus tween 80) was placed on the seeded petri plate as a vehicle control. Standard disc containing antibacterial drugs (gentamicin, tetracycline, cefpirome and ampicillin) were used as reference control. The petri plates were incubated at 37°C for 18 h. After the incubation period, the zone of inhibition was measured. Among the tested bacteria, Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes and Escherichia coli showed the sensitivity at different concentration of cinnamon powder ethanolic extract whereas Streptococcus agalactiae and Pseudomonas aeruginosa showed no zone of inhibition. Aqueous extract of cinnamon powder showed no antibacterial activities against all tested bacteria. The minimum inhibitory concentration of cinnamon powder ethanolic and aqueous extracts were determined by micro-broth dilution technique. The results of MIC revealed that both ethanolic and aqueous extracts showed various MIC against all tested bacteria. Ethanolic extract of cinnamon powder has lower MIC value against Staphylococcus aureus among tested bacteria.

Aims: The aim was to determine antimicrobial and anticancer activities for water and ethanol extracts of leaves and shooting parts of seablite. Materials and Methods: Anticancer activity tests of seablite extracts were performed by resazurin microplate assay (REMA) and tested with 3 cell lines including KB cell line, epidermoid carcinoma of the oral cavity (American Type Culture Collection [ATCC] CCL-17), MCF-7 cell line, breast adenocarcinoma (ATCC HTB-22) and NCI-H187 cell line, and small cell lung carcinoma (ATCC CRL-5804). Antimicrobial activities of seablite water and ethanol extracts against herpes simplex virus type-I (HSV-1) and Mycobacterium tuberculosis H 37 Ra strain were tested according by green fluorescent protein-based assay; Candida albicans (ATCC 90028) and Bacillus cereus (ATCC 11778 or TISTR 687) were tested according by REMA; and Plasmodium falciparum , K1 strain was tested according by micro-culture radioisotope techniques. Results: Both extracts were not possessed anticancer activity to KB-oral cavity cancer, MCF7-breast cancer and NCI-H187-small lung cancer cell lines at maximum concentration = 50 μg/mL. In the same way to anticancer activity assays, both extracts were not inhibited HSV-1, P. falciparum K1 strain, M. tuberculosis H 37 Ra strain and B. cereus at the same concentration. Conclusions: Ethanol and water extracts of leaves and shooting parts of seablite had no significant anticancer and antimicrobial activities.

Introduction: Chemical substances used for prevention of dental caries are known to have many side-effects. Thus, natural products should be explored for their anticaries action. Objectives: To prepare 5% and 20% concentrations of ethanolic and water extracts of guava leaves and to assess their activity against Lactobacillus acidophilus. Materials and Methods: In vitro experimental study was conducted in Department of Biosciences. Ethanolic and water extracts of guava leaves were prepared using Soxhlet extractor. Two concentrations 5% and 20% weight/volume of both extracts were prepared. Test organism L. acidophilus Microbial Type Culture Collection 447 was obtained in lyophillized form. After revival in nutrient broth, bacteria were grown on Lactobacilli de Man, Rogosa, Sharpe agar for further experiment. Antimicrobial testing of extracts was done using Agar well-diffusion method. Ten plates each were prepared for both extracts. Chlorhexidine (0.2%) served as a positive control and distilled water as a negative control. Results: Mean zone of inhibition produced by 5% and 20% ethanolic extract was 11.2 mm and 14.1 mm respectively and by 5% and 20% water extract was 1.6 mm and 5.1 mm respectively. Statistical analysis of results using one-way ANOVA and post-hoc Tukey's test revealed that activity of 5% ethanolic extract and 5%, 20% water extract was significantly less than that of 0.2% chlorhexidine. There was no statistical difference in efficacy of 20% ethanolic extract of guava and 0.2% chlorhexidine (P = 0.270). Conclusion: Ethanolic and water extracts of guava leaves possess antibacterial activity against L. acidophilus with 20% ethanolic extract being as efficacious as 0.2% chlorhexidine.

The plant‐based medicine and diet is gaining importance in recent days. The consumption of Triticum aestivum grass in the form of juice and tablets is increasing among common people. The present study elaborates on the nutritional, antioxidant, and antimicrobial potential of a nongenetically modified type of T. aestivum grass, along with the evidence of molecular docking studies. The T. aestivum grass extracts like decoction, aqueous, ethanol, and chloroform were subjected to preliminary phytochemical tests, quantitative estimation, antioxidant analysis, and antimicrobial activity determination. The ethanolic extract that had good antioxidant and antimicrobial potential was subjected to gas column–mass spectroscopy (GC–MS) analysis and the compounds identified were docked against the antioxidant and antimicrobial receptors. The decoction and aqueous extracts performed well in preliminary qualitative tests with the presence of most of the phytochemicals tested. The decoction, aqueous, and ethanolic extracts possessed good concentrations of the phytochemicals. The decoction had about 210.83 ± 9.16 and 154.16 ± 0.33 mg/g of carbohydrates and proteins, respectively, while the aqueous extract had about 10.91 ± 0.08 mg/g of amino acids and the ethanolic extract had about 52.5 ± 1.4 mg/g of phenolic content, which were the highest concentration of the phytochemicals observed among the extracts. Along with phytochemical potential, good antioxidant potential in the DPPH and ABTS by decoction as well as ethanolic extract with nearly 40 and 90% inhibition, respectively, and in FRAP by aqueous extract with maximum OD value. The ethanolic extract exhibited the best inhibition potential against the Staphylococcus aureus about 28 ± 1 mm, Pseudomonas aeruginosa with 20 ± 2 mm, Bacillus cereus at 20 ± 1 mm by the ethanolic extract at 200 μg concentration, and Aspergillus fumigatus and A. niger at 15 ± 0 mm by the aqueous extract at 200 μg concentration. The GC–MS analysis revealed the presence of terpenoids, alkaloids, and phenols, which on docking had highest binding capacity toward the antioxidant and antimicrobial receptors.

Morus alba L. (Moraceae) leaves are used effectively to treat fever, protect liver from damage, strengthen the joints, facilitate discharge of urine in Turkey folk medicine. In this study we aimed to determine in vitro antioxidant and antimicrobial activity with GC/MS analysis of the Morus alba L. leaves. Dried plant leaves samples are milled and extracted with distilled water and ethanol in Soxlet machine. After extraction, extract samples were concentrated in rotary evaporator machine. Total antioxidant status values were determined as mmol Trolox Equivalent/L spectrophotometrically by using Erel’s method. Sterile extracts used to avoid contamination in antimicrobial activity test. As test microorganisms Escherichia coli (ATCC 25922), Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 29212), Pseudomonas aeroginosa (ATCC 27853), Candida albicans (ATCC 90028) were used. Antimicrobial activity was determined with disk diffusion method. We used ethanol extracts of samples in GC/MS analysis. Ethanol and distilled water extracts showed antioxidant activity in different rate. Besides, ethanol extracts have an antimicrobial activity but water extracts have not antimicrobial activity on our test microorganisms. We determined four compounds (9,12,15-octadecatrienoic acid, ethyl ester, linolenic acid ethyl ester, gibberellic acid) with GC/MS analysis in ethanol extracts. In this researh we enlightened antimicrobial and antioxidant activities with GC/MS analysis of Morus alba L. leaves. So this research support of using this plant leaves in pharmacological and medical processes. Keywords: Antioxidant activity; Antimicrobial activity; GC/MS analysis; Morus alba L., extraction DOI: 10.17350/HJSE19030000006 Full Text: