scholarly journals Antimicrobial activity of bergenin from Endopleura uchi (Huber) Cuatrec

2009 ◽  
Vol 39 (1) ◽  
pp. 187-191 ◽  
Author(s):  
Saulo L. da Silva ◽  
Viviane Guedes de Oliveira ◽  
Tomomasa Yano ◽  
Rita de Cássia Saraiva Nunomura
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Aspergillus Flavus ◽  
Salmonella Enteritidis ◽  
Methanol Extract ◽  
Ethyl Acetate Fraction ◽  
Bark Extract ◽  
Gram Negative Bacteria ◽  
High Concentration ◽  
Traditional Use

Endopleura uchi (Huber) Cuatrec. is an Amazon species traditionally used as treatment for inflammations and female disorders. Bergenin was isolated from ethyl acetate fraction of bark of E. uchi by using column chromatography over sephadex LH-20 and then silica gel 60 flash. Its structure was identified on the basis of its NMR spectra. The antimicrobial activity of bergenin and fractions of methanol extract of E. uchi were evaluated against ATCC microorganisms (Escherichia coli, Salmonella enteritidis, Pseudomonas aeruginosa, Enterococcus faecalis, Staphylococcus aureus, Candida albicans, C. guilliermondii, Aspergillus flavus, A. nidulans). Clinically isolated strains of all of these microorganisms, along with C. tropicalis, A. niger, Shigella sonnei, Serratia marcenses and Klebsiella pneumoniae were also evaluated. The growth inhibition caused by bergenin, extracts and fractions of E. uchi against ATCC microorganisms were similar to the inhibition to microorganisms clinically isolated. The ethyl acetate fraction and the isolate bergenin inhibit the growth of the yeasts C. albicans, C. tropicalis, and C. guilliermondii, but present lower activity against filamentous fungi Aspergillus flavus, A. nidulans, A. niger, and did not inhibit the Gram positive and Gram negative bacteria. The activity of the ethyl acetate fraction and bergenin are in agreement wit its high concentration found in bark extract of E. uchi. Moreover, the selective activity against three Candida species helps to understand its traditional use against infections that affect women.

scholarly journals PHYTOCHEMICAL AND ANTIMICROBIAL ACTIVITY OF THE LEAVES OF LANNEA KERSTINGII ENGL & K. KRAUSE (ANACADIACEAE)

2014 ◽  
Vol 04 (04) ◽  
pp. 004-009
Author(s):  
Njinga NS ◽  
Sule MI ◽  
Pateh UU ◽  
Hassan HS ◽  
Ahmad MM ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Petroleum Ether ◽  
Methanol Extract ◽  
Petroleum Ether Extract ◽  
Ethyl Acetate Fraction ◽  
Antimicrobial Activities ◽  
Chloroform Fraction ◽  
Ether Extract ◽  
Minimum Fungicidal Concentration

AbstractThe phytochemical and antimicrobial activity of the petroleum ether and crude methanol extracts, chloroform and ethyl acetate fractions of the leaves of Lannea kerstingii were investigated. Phytochemical screening revealed the presence of steroids and triterpenes in the petroleum ether extract, steroid, triterpene, flavonoids and tannins in both crude methanol extract and chloroform fraction while the ethyl acetate fraction contained only flavonoids and tannins. The extracts exhibited antimicrobial activities with zones of inhibition ranging from 17.00 to 21.03, 20.10 to 25.24, 25.32 to 34.02 and 22.28 to 27.20 mm for petroleum ether extract, methanol extract, chloroform and ethyl acetate fractions respectively. The minimum inhibitory concentration was between 5 and 10mg/ml, 5mg/ml for the petroleum ether and methanol extract respectively, and between 2.5 and 5 mg/ml, 5mg/ml for the acetate fractions. The minimum bactericidal concentration for all the extracts was 40mg/ml respectively except for chloroform fraction which ranged from 20 to 40mg/ml. The minimum fungicidal concentration for all the extracts was found to be 40mg/ml respectively. This result indicates the broad spectrum antimicrobial potential of L. Kerstingii and justifies the use of this plant in traditional medicine.

scholarly journals Antimicrobial activity and synergistic effects of an ethyl acetate fraction from methanol extract of Myracrodruon urundeuva bark

2015 ◽  
Vol 9 (21) ◽  
pp. 641-646 ◽  
Author(s):  
Jose Braz Jandu Jannyson ◽  
Claudio Nascimento da Silva Luis ◽  
Vanusa da Silva Marcia ◽  
Tereza dos Santos Correia Maria
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Methanol Extract ◽  
Synergistic Effects ◽  
Ethyl Acetate Fraction

scholarly journals ANTIMICROBIAL ACTIVITIES OF Shorea foxworthyi Sym STEAM BARK METHANOL EXTRACT

2010 ◽  
Vol 8 (1) ◽  
pp. 114-118
Author(s):  
Andi Hairil Alimuddin ◽  
Masriani Masriani
Keyword(s):  
Antimicrobial Activity ◽  
Thin Layer ◽  
Ethyl Acetate ◽  
Thin Layer Chromatography ◽  
Methanol Extract ◽  
Ethyl Acetate Fraction ◽  
Antimicrobial Activities ◽  
Chloroform Extract ◽  
E Coli ◽  
Layer Chromatography

Screening of antimicrobial activity compound from steam bark of Shorea foxworthyi Sym by Thin Layer Chromatography-Bioautography method have been conducted. The result of this research can be base in elucidation of antimicrobial activity compounds from S. foxworthyi Sym. The first step was done in this research that is maceration of S. foxworthyi steam bark using methanol solvent. Fractination to methanol extract was done using n-hexane, chloroform, and ethyl acetate solvent, respectively. Phytochemical screening were done to methanol, chloroform, n-hexane, and ethyl acetate fractions. Screening of antimicrobial activity compound were done to polar fraction such as methanol, chloroform, and ethyl acetate fraction. The bacteria were used in this screening such as E. coli, S. aureus, S. thypii, and B. Subtilis. The extract was highest antimicrobial activity choosed to test by Thin Layer Chromatography-Bioautography. The result was showed that chloroform extract was had highest antimicrobial activity and the flavonoide of compaund was considered having antimicrobial activity.   Keywords: antimicrobial, TLC-Bioautography, and Shorea foxworthyi Sym

scholarly journals Evaluation of in-vitro antibacterial and antifungal activities of crude extracts and solvent fractions of methanol extract of leaves of Ricinus communis Linn (Euphorbiaceae) against selected pathogens

2020 ◽  
Author(s):  
Bedaso Kebede ◽  
Workineh Shibeshi
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Ethyl Acetate ◽  
Crude Extract ◽  
Antimicrobial Agents ◽  
Methanol Extract ◽  
Ricinus Communis ◽  
Ethyl Acetate Fraction ◽  
Absolute Methanol ◽  
E Coli

Abstract Background Impacts of infectious diseases are reduced due to development of antimicrobial agents. However, the effectiveness of the antimicrobial agents is reduced over time because of the emergence of antimicrobial resistance.To overcome these problems scholars have been searching for alternative medicines, particularly focusing on traditionally used medicinal plants. Ricinus communis Linn is used as a traditional treatment for bovine mastitis, wound infection, and other medicinal purposes. Moreover, the antimicrobial activity of Ricinus communis Linn leaf at crude extract level has been confirmed against human originated pathogens in the previous studies. The objective of the present study was to further evaluate the antimicrobial activities of Ricinus communis Linn leaf extracts and fractions. The Ricinus communis Linn leaves were macerated in absolute methanol and acetone solvents. The methanol crude extract was shown best antimicrobial activity and exposed to further fractionation via increasing polarity of solvents (n-hexane, chloroform, ethyl acetate, and aqueous). Test microorganisms included in the study were six laboratory reference bacteria (E. coli, S. aureus, S. agalactiae, K. pneumoniae, P. aeruginosa, and S. Pyogenes), two clinical isolate bacteria (E. coli and S. aureus), and Candida albicans. The agar well diffusion method was employed to determine antimicrobial activity. The minimum inhibitory concentrations (MIC) and minimum bactericidal/fungicidal concentrations (MBC/MFC) were determined through broth microdilution method. Results The results indicated that the best antimicrobial activity(based on zone of inhibition) for ethyl acetate fraction ranging from 14.67 mm (clinical E. coli) to 20.33 mm (S. aureus) at 400mg/ml however, n-hexane exhibited lowest antimicrobial activity. Among tested fractions, ethyl acetate fraction was produced lowest MIC values ranging from 1.5625mg/ml (S. aureus) to 16.67 mg/ml (Candida albicans). The ethyl acetate fraction showed bactericidal activity against all tested microorganisms. Conclusion Methanol extract of Ricinus communis Linn leaf exhibited better antimicrobial activity than acetone extract. Hence, ethyl acetate fraction of crude methanol extract exhibited best antimicrobial activity indicating its potential for development of antimicrobial products.

scholarly journals Evaluation of in-vitro antibacterial and antifungal activities of crude extracts and solvent fractions of methanol extract of leaves of Ricinus communis Linn (Euphorbiaceae) against selected pathogens

2020 ◽  
Author(s):  
Bedaso Kebede ◽  
Workineh Shibeshi
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Ethyl Acetate ◽  
Crude Extract ◽  
Antimicrobial Agents ◽  
Methanol Extract ◽  
Ricinus Communis ◽  
Ethyl Acetate Fraction ◽  
Absolute Methanol ◽  
E Coli

Abstract Background Impacts of infectious diseases are reduced due to development of antimicrobial agents. However, the effectiveness of the antimicrobial agents is reduced over time because of the emergence of antimicrobial resistance.To overcome these problems scholars have been searching for alternative medicines, particularly focusing on traditionally used medicinal plants. Ricinus communis Linn is used as a traditional treatment for bovine mastitis, wound infection, and other medicinal purposes. Moreover, the antimicrobial activity of Ricinus communis Linn leaf at crude extract level has been confirmed against human originated pathogens in the previous studies. The objective of the present study was to further evaluate the antimicrobial activities of Ricinus communis Linn leaf extracts and fractions. The Ricinus communis Linn leaves were macerated in absolute methanol and acetone solvents. The methanol crude extract was shown best antimicrobial activity and exposed to further fractionation via increasing polarity of solvents (n-hexane, chloroform, ethyl acetate, and aqueous). Test microorganisms included in the study were six laboratory reference bacteria (E. coli, S. aureus, S. agalactiae, K. pneumoniae, P. aeruginosa, and S. Pyogenes), two clinical isolate bacteria (E. coli and S. aureus), and Candida albicans. The agar well diffusion method was employed to determine antimicrobial activity. The minimum inhibitory concentrations (MIC) and minimum bactericidal/fungicidal concentrations (MBC/MFC) were determined through broth microdilution method. Results The results indicated that the best antimicrobial activity(based on zone of inhibition) for ethyl acetate fraction ranging from 14.67 mm (clinical E. coli) to 20.33 mm (S. aureus) at 400mg/ml however, n-hexane exhibited lowest antimicrobial activity. Among tested fractions, ethyl acetate fraction was produced lowest MIC values ranging from 1.5625mg/ml (S. aureus) to 16.67 mg/ml (Candida albicans). The ethyl acetate fraction showed bactericidal activity against all tested microorganisms. Conclusion Methanol extract of Ricinus communis Linn leaf exhibited better antimicrobial activity than acetone extract. Hence, ethyl acetate fraction of crude methanol extract exhibited best antimicrobial activity indicating its potential for development of antimicrobial products.

Antibacterial Activity of Cissus incisa Extracts against Multidrug- Resistant Bacteria

2020 ◽  
Vol 20 (4) ◽  
pp. 318-323 ◽  
Author(s):  
Deyani Nocedo-Mena ◽  
Elvira Garza-González ◽  
Mauricio González-Ferrara ◽  
María del Rayo Camacho-Corona
Keyword(s):  
Antimicrobial Activity ◽  
Antimicrobial Agents ◽  
Methanol Extract ◽  
Biological Activities ◽  
Multidrug Resistant ◽  
Resistant Bacteria ◽  
Gram Negative Bacteria ◽  
Alamar Blue ◽  
Traditional Use ◽  
Chloroform Methanol

Aims: The need to find new antimicrobial agents to cope with this phenomenon increases. Background: Infection diseases are illness caused by different microorganisms, such as bacteria, among those caused by resistant bacteria are associated with greater morbidity, mortality and cost of the treatment than those caused by sensitive bacteria of the same species. Objective: Need to find new antimicrobial agents to cope with this phenomenon increases. Method: This work carried out the study of biological activities of Cissus incisa, taking account its traditional use. Three extracts were prepared from the leaves of this plant: hexane, chloroform methanol (1:1) and aqueous. Their antibacterial and antitubercular activities were evaluated using microdilution and alamar blue assays; respectively. Result: The chloroform/methanol extract (1:1) was the most active of the three tested extracts for antimicrobial activity. In this way, the extract exhibits a broad spectrum of antimicrobial activity, against the Gram positive and Gram negative bacteria tested, with MIC values between 125 to 500 μg/mL. Conclusion: This research contributes both to the knowledge of the Mexican flora, as well as the discovery of potential antibacterial agents derivate from plants.

Assessment of Antimicrobial Activity and total Polyphenol Content of Rosa multiflora and Rosa wichuraiana

2019 ◽  
Vol 10 (04) ◽  
pp. 646-650
Author(s):  
Hyeusoo Kim ◽  
Kyeong Won Yun
Keyword(s):  
Antimicrobial Activity ◽  
Ethyl Acetate ◽  
Antimicrobial Agents ◽  
Ethyl Acetate Fraction ◽  
Rosa Multiflora ◽  
Polyphenol Content ◽  
Total Polyphenol ◽  
Water Fraction ◽  
Total Polyphenol Content ◽  
Rosa Species

The fruit of Rosa multiflora has been used as traditional herbal medicine in Asian countries. The present investigation was undertaken to study the antimicrobial activity and total polyphenol content of hexane, ether, ethyl acetate, water fraction of methanol extract of fruit and flower from Rosa multiflora and Rosa wichuraiana. Antimicrobial activity of the mentioned fractions against 3 gram-positive and 4 gram-negative bacteria using disk diffussion method. The measurement of minimal inhibition concentration (MIC) showed that the ethyl acetate fraction of the two Rosa species is the most effective against the tested bacteria. The total polyphenol content of ethyl acetate fraction of the two Rosa species is higher than the other fractions. The results indicate the antimicrobial activity was related with the total polyphenol content and the fruit and flower of the two Rosa species can be considered as a natural source of antimicrobial agents.

scholarly journals Antimicrobial Activity of Coriander sativum

2021 ◽  
pp. 74-81
Author(s):  
Samina Amin Qurban Ali ◽  
Arif Malik
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Essential Oils ◽  
Aspergillus Flavus ◽  
Food Additives ◽  
Inhibition Zone ◽  
Microbial Pathogens ◽  
Bacterial Strains ◽  
High Concentration ◽  
Natural Oils

The increasing rate of drug-repellent pathogens and poisonousness of existing antiseptic compounds has strained attention toward activity of antimicrobial products which are natural. Main purpose of this research was to assess antimicrobial activity of seeds and leaves of Coriandrum sativum’s essential oil, antioxidant, antimicrobial activity and chemical composition of Coriandrum sativum’s ethanol extracts and essential oils. Numerous approaches were used in reviewing the antioxidant activity such as, p-anisidine test – malonaldhyde, DPPH and peroxide value. Antimicrobial activity of the extracts towards six microbial strains; two bacterial strains (Salmonella typhi and Staphylococcus aureus), one yeast (Candida tropicals) and three fungal strains (Aspergillus flavus, Mucor sp and Emericella nidulans) was assessed by determination of inhibition zone and count of bacteria, yeast and spares of fungus. The antimicrobial mechanisms found in these essential oils have been explained on the basis of their content in natural compounds such as carvacrol, thymol, p-cymene and c-terpinene, among others. Although these two essential oils have received much attention, scientists working in the fields of biomedicine and food science are paying increasing attention to a wider variety of aromatic natural oils in an effort to identify original and natural applications for the inhibition of microbial pathogens. In conclusion, utilization of coriander or their components as food additives will increase the antioxidant and the antimicrobial potential of the food which prevent food deterioration and improve the shelf-life of food beside its nutritional value. The results revealed that the leaves extracts have high levels of phenolics than the seeds extract. Concerning antioxidant activity, significant decreases (p>0.001) were observed in peroxide, P- anisidine and TBA values as compared to control oil. On the other hand, scavenging activity % of the four extracts on DPPH radical were higher than that of butylated hydroxyl toluene (BHT) especially with high concentration (1000 μg/ ml). Regarding antimicrobial activity, the results showed that the extract of coriander seeds has the highest reduction percent in growth of all the examined microorganisms. The result also revealed that Mucor sp was resistant to the action of parsley extracts while Aspergillus flavus has the highest resistance against coriander extracts.

scholarly journals Study and evaluation of antimicrobial activity and antioxidant capacity of dry extract and fractions of leaves of Raphanus sativus var. oleiferus Metzg.

2020 ◽  
Vol 36 (2) ◽  
Author(s):  
Ana Flávia da Silva ◽  
Marisa de Oliveira Lopes ◽  
Cláudio Daniel Cerdeira ◽  
Ingridy Simone Ribeiro ◽  
Isael Aparecido Rosa ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Minimum Inhibitory Concentration ◽  
Ethyl Acetate ◽  
Raphanus Sativus ◽  
Inhibitory Concentration ◽  
Ethyl Acetate Fraction ◽  
Antimicrobial Activities ◽  
Dry Extract ◽  
Antioxidant And Antimicrobial Activities

The radish (Raphanus sativus L.) is a vegetable of the Brassicaceae family cultivated worldwide and has several medicinal properties. Its biological activities are related to various secondary metabolites present in the species, especially phenolics. Thus, the objectives of this study were the chemical analysis and evaluation of the antioxidant and antimicrobial activities of the dry extract and fractions of the fodder turnip leaves (R. sativus var. oleiferus Metzg.). Samples were analyzed by mass spectrometry and the antioxidant activity was evaluated using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical method and the reducing power method. Antimicrobial activity was determined by the agar diffusion and microdilution methods. The total phenols were concentrated in the butanol fraction (121.27 mg GAE/g) and the flavonoids were concentrated in the ethyl acetate fraction (98.02 mg EQ/g). The ethyl acetate fraction showed the best antioxidants results, with 83.45% of free radical scavenging and 11.34% of ferric ions reduction. The analysis of antimicrobial activity showed that the dry extract had the highest average zone of inhibition against Bacillus subtilis (18.67 mm). Smaller values of the minimum inhibitory concentration for Micrococcus luteus were, and the ethyl acetate fraction showed a lower minimum inhibitory concentration (0.1 mg/ml) for that microorganism. There was a strong correlation between the antioxidant activity and the content of phenols and flavonoids. The results showed the potential antioxidant and antimicrobial activities of this extract with the ethyl acetate fraction being most promising for further studies.

Sign in / Sign up

Export Citation Format

Share Document