scholarly journals Antimicrobial and Antioxidant Studies of the Leaf Extract and Fractions of Sabicea brevipes Wernham (Rubiaceae)

Author(s):  
Chimaobi O. Ugorji ◽  
Janefrances N. Ihedioha ◽  
Matthias O. Agbo ◽  
Nwachukwu R. Ekere ◽  
Felix I. Nwafor ◽  
...  

Phytochemical analysis, antimicrobial and antioxidant properties of the leaf extract and fractions of Sabicea brevipes were studied. The leaves were defatted and the marc extracted with methanol. The extract was further purified by solvent-solvent partitioning using n-hexane, ethyl acetate and n-butanol to obtain the three solvent fractions. They were screened for phenolics, flavonoids, tannins, saponins, terpenoids, glycosides, and steroids. Total phenolics, flavonoids and tannins were determined quantitatively. The antimicrobial test was screened in vitro by agar diffusion method. Analysis of variance (ANOVA) was used to test for significant difference at p ≤ 0.05 in all study groups. The methanol extract exhibited the most significant amount of phenolics (110.78 ± 1.06 mg GAE/g) while ethyl acetate fraction had the least total phenolics content (50.55 ± 2.91 mg GAE/g). The same trend was observed for the total flavonoids content whereas the methanol extract measured (418.40 ± 14.03 mg QE/g) while ethyl acetate fraction had 192.40 ± 3.06 mg QE/g. Total tannins contents were: methanol extract (102.22 ± 7.58 mg GAE/g) and ethyl acetate (27.33 ± 0.77 mg GAE/g). The antioxidant results showed that the methanol extract had the highest DPPH free radical scavenging ability (93.69%) with half maximal inhibitory concentration (IC50) of 0.601± 0.02 and also highest ferric ion reducing power (50.381 ± 1.56 µmol Fe2+/g). Also, the methanol extract showed high total antioxidant capacity (96.79 ± 0.31 mg AAE) and IC50 of 0.798± 0.01. The antimicrobial results revealed that the methanol extract showed better activity against Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aureus, and Candida albicans than the solvent fractions at concentrations of 200, 100, 50, 25, 12.5, mg/mL having various inhibition zone diameters (IZDs). The methanol extract and fractions of S. brevipes compared favourably in terms of zone of inhibition and minimum inhibition concentration (MIC) with the standard drug disc (Gentamycin and Ketoconazole) against the tested microorganisms. The MIC of the extract and solvent fractions ranged from 6.31 mg/mL to 50.12 mg/mL. The continual use of the extract of Sabicea brevipes in preventing oxidative stress and in the treatment of common infection is justified by these results.

INDIAN DRUGS ◽  
2016 ◽  
Vol 53 (12) ◽  
pp. 52-54
Author(s):  
R. Chawla ◽  
◽  
D. Kumar ◽  
K Rana ◽  
H. Joshi ◽  
...  

The present investigation was planned to estimate total phenols and antioxidant activity in Clematis erecta aerial parts. Properly identified powdered plant was successively extracted in Soxhlet apparatus with solvents in order of increasing polarity viz., petroleum ether, chloroform, methanol and water. Ethyl acetate fraction and 1-butanol fraction of methanol extract were prepared using standardized procedure. Quantification of phenols was done on the basis of standard curve of gallic acid using standardized procedures. In vitro antioxidant activity was evaluated using DPPH assay in comparison to standard drug rutin. Maximum phenols content and antioxidant activity was found in ethyl acetate fraction followed by methanol extract and 1-butanol fraction, whereas negligible phenols content and antioxidant activity was observed in petroleum ether, chloroform and water extracts. The available literature reveals that polyphenols have been reported to possess antioxidant properties. Finally, it can be concluded that these polyphenols may be responsible for antioxidant properties.


Author(s):  
Venkanna Banothu ◽  
Uma Adepally ◽  
Jayalakshmi Lingam

Objective: To estimate the in vitro total phenolics, flavonoids contents, antioxidant and antimicrobial activities of various solvent extracts from the medicinal plant Physalis minima Linn.Methods: The crude bioactive were extracted from the dried powder of Physalis minima using methanol, ethyl acetate, chloroform and hexane solvents. Total phenolic content (TPC) and total flavonoid content (TFC) were estimated using Folin-Ciocalteu and aluminium chloride colorimetric methods respectively. 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2’-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and ferric reducing antioxidant power (FRAP) assays were used to determine the in vitro antioxidant capacity. The antimicrobial assay was done through agar well diffusion; minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined using broth microdilution methods against the Gram-negative bacteria (Klebsiella pneumoniae, Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris) and Gram-positive bacteria (Staphylococcus aureus).Results: TPC expressed as gallic acid equivalents (GAE) ranged from 60.27±1.73-151.25±2.50 mg GAE/g dry weight, and TFC expressed as quercetin equivalents (QE) ranged from 56.66±0.80-158.84±2.30 mg QE/g dry weight. Methanol extract showed the highest antioxidant activity followed by ethyl acetate, chloroform, hexane extract and the IC50 values of methanol extract for scavenging DPPH and ABTS free radicals were 280.23±5.75-173.40±0.38µg/ml, respectively. All the extracts have shown potent antimicrobial activity for the zone of inhibition ranged from 9-35 mm; MICs and MBCs values ranged from 0.125-4.0 and 0.25-8.0 mg/ml, respectively towards tested pathogenic species.Conclusion: The comprehensive analysis of the present results demonstrated that Physalis minima possess high potential antioxidant properties which could be used as a viable source of natural antioxidants in treating infections caused by above-mentioned pathogens.


2020 ◽  
Vol 7 (11) ◽  
pp. 276-284
Author(s):  
Garga M. A. ◽  
Manga S. B. ◽  
Rabah A.B. ◽  
Tahir H. ◽  
Abdullahi M. ◽  
...  

The aim of this study was to investigate the antibacterial effect and identify the phytochemical constituents of Moringa oleifera leaves and seeds extract on Staphylococcus aureus (S. aureus) clinical isolates using agar well diffusion method. The samples were collected from the premises of Usmanu Danfodiyo University, Sokoto. The Seeds and Leaves were collected fresh. They were extracted using methanol and ethyl acetate. Various concentrations from 100mg/ml to 500mg/ml were prepared. The test bacteria used is Staphylococcus aureus obtained from Microbiology laboratory of the Usmanu Danfodiyo University. The bacteria were re-identified using biochemical tests. The bacterial inoculums were standardized to McFarland scale 0.5. Zone of inhibition were read after 24 hours of incubation at 370C.The results of the antibacterial study revealed that the methanolic leaves extracts at 500 mg/ml had effect on S. aureus with zone of inhibition of 20mm. The methanolic seed extract have effect on S. aureus with zone of inhibition of 19.5mm. The MIC for the leave and seed extracts for Staphylococcus aureus was 250mg/ml. The MBC was 500mg/ml. The results of the phytochemical analysis revealed the presence of flavonoid, tannins, saponins, cardiac glycosides, alkaloids, volatile oil, saponin glycosides, and glycosides but anthraquinone and steroids were absent in the extracts. The zones of inhibition showed that both the methanolic and ethyl acetate extracts at 500mg/ml were active to all the tested bacteria. ANOVA and Duncan Multiple Mean Range test was used to analyze the data. Based on Duncan’s grouping, there is significant difference between the solvents and the concentrations used.


2016 ◽  
Vol 8 (3) ◽  
pp. 444 ◽  
Author(s):  
Chekuri Sudhakar ◽  
Narendar Vankudothu ◽  
Shivaprasad Panjala ◽  
Nirmala Babu Rao ◽  
Roja Rani Anupalli

The herb <em>Acalypha indica </em>which belongs to Euphorbiaceae family has multiple medicinal properties which include anti-oxidant, anti-bacterial, anti-fungal, anti-inflammatory, antiulcer, anti-helmintic, anti-cancerous, anti-venom, and neuro-protective activity. The present study was designed to evaluate the phytochemical, antimicrobial and anti-oxidant activity of <em>Acalypha indica </em>leaves extracts in different solvent extractions like methanol, hexane, ethyl acetate and petroleum ether. Fresh leaves of the plant were collected and shade dried. Dried leaves were milled to obtain powder. Powder was subjected to soxhlet extraction using solvents and extracts were successively obtained. Phytochemical analysis was conducted following standard methods.  Phytochemical analysis showed the presence of Alkaloids, Phenols, Saponins, Flavanoids and Amino acids. Leaf extract of methonal have shown the highest anti-oxidation capacity than hexane, ethyl acetate and petroleum ether. Anti-microbial activity has been performed on microbes like <em>Bacillus sps</em>, <em>E.coli,</em> <em>Psuedomonas sps</em> and <em>Streptococcus sps.</em> A highest value of zone of inhibition was found in methanol extract against <em>E.coli.</em> These results provide evidence that <em>Acalypha indica </em>leaf extract possesses vital phytochemicals, antimicrobial and antioxidant properties. Hence this plant can be studied further for drug analysis for finding potent medicines for diseases.


Author(s):  
Ojah Emmanuel Onah ◽  
Kachi Jolly Babangida

Background: Micro-organisms are responsible for the transmission of a large number of diseases. It is hard to comprehend the amount of diseases, deaths and economic losses caused by micro-organisms alone. Plants are good sources of eco-friendly and readily available antimicrobial agents. Purpose: The aim of this study was to evaluate the chemical constituents and antimicrobial characteristics of three fractions from ethnomedicinal Icacina trichantha. Oliv. (Icacinaceae).Methods: Methanol extract from Icacina trichantha. Oliv was obtained by maceration and fractionated successively using hexane, and ethyl acetate. The antimicrobial properties of Icacina trichantha. Oliv was assessed using agar cup diffusion method on MRSA, P. aeruginosa, S. typhi, C. krusei, S. dysenteriae, S. pyrogenes, E. coli, K. pneumoniae, C. albicans, and C. tropicalis. Phytochemical screening on fractions was also evaluated using standard methods.Results: Phytochemical screening on fractions revealed the presence of saponins, alkaloids, steroids, tannins, and glycosides. Agar diffusion assay on fractions showed growth inhibitory effect on all the organisms except P. aeruginosa, S. typhi, and C. tropicalis. The MIC revealed that n-hexane fraction was active against MRSA, S. pyrogenes, E. coli, K. pneumonia, C. albicans and C. krusei at 10 mg/mL while S. dysenteriae was active at 5 mg/mL. The ethyl acetate fraction was active against all the organisms at a concentration of 5 mg/mL except P.aeruginosa, S.typhi and C.tropicalis. Methanol fraction showed activity of 5 mg/mL against MRSA, S. pyrogenes, E. coli, S. dysenteriae, C. albicans and C. krusei except for K. pneumoniae with activity at 10 mg/mL. Minimum bactericidal concentration/fungicidal concentration MBC/MFC evaluated on the n-hexane fraction revealed that MRSA, S. pyrogenes, E. coli, K. pneumoniae, S. dysenteriae, C. albicans, and C. krusei were activeat 20 mg/mL, while the ethyl acetate fraction had MBC/MFC of 10 mg/mL against all the organisms except P. aeruginosa, S. typhi, C. tropicalis. Methanol extract had MBC/MFC of 10 mg/mL against MSRA, E.coli and S. dysenteriae whereas S. pyrogenes, K. pneumoniae, C. albicans and C. krusei had MBC/MFC at 20 mg/mL.Conclusion: Icacina trichantha. Oliv. contain constituents with concentration dependent antimicrobial properties based on type of organism. The plant could be useful in the prevention and treatment of multi-resistant disease causing microorganisms.


2019 ◽  
Author(s):  
Chem Int

Phytochemical analysis of n-hexane, ethyl acetate and methanol extracts of the aerial parts of Coccinia barteri was carried out. These extracts exhibited satisfactory inhibitory activities against bacteria and fungi strains, which include; Staphylococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, Salmonella typhii, Klebsiella pneumoniae, Candida albicans, Aspergillus niger, Penicillium notatum and Rhizopus stolonifer. Methanol extract of C. barteri possesses antioxidant activity by scavenging DPPH free radical with IC50 of 187.56 μg/mL, using DPPH antioxidant assay. GC-MS analysis of n-hexane, ethyl acetate and methanol extracts of the plant principally revealed the presence of phytol, ethyl hexadecanoate and clionasterol with their corresponding percentage abundance of 57.75%, 18.33% and 9.79%, respectively.


2020 ◽  
Vol 16 ◽  
Author(s):  
V. Vanitha ◽  
S. Vijayakumar ◽  
S. Rajalakshmi

Aim: To investigate the antimicrobial efficacy of various solvents leaf extracts of Aegle marmelos, Plumbago zeylanica and Rhinacanthus nasutus against human pathogenic organisms such as Acinetobacter baumannii, Salmonella enteriditis, Bacillus cereus, Streptococcus pneumonia, Mycobacterium tuberculosis and Aspergillus fumigatous by agar well diffusion method. Background: Also, this is the first time report on MIC and MBC/MFC activities and identify the phytochemicals and functional groups using HPLC, GC-MS and FT-IR analysis. Objective: Minimum inhibitory concentration (MIC), minimum bactericidal (MBC/MFC) values were also carried out by the micro dilution method. Methods: Ethyl acetate extract of P. zeylanica showed better antimicrobial activity against the tested pathogens, especially for S. pneumoniae (40 mm) followed by ethyl acetate extract of R. nasutus (36 mm) against S. pneumoniae. While least inhibition was observed for aqueous extract of P.zeylanica against S. enteritis (10 mm). Results: The MIC ranged from 3.75 µg/ml to 60µg/ml and MBC/MFC 7.5 µg/ml to 60 µg/ml. Phytochemical analysis exhibited the presence of alkaloids, steroids, saponins, flavonoids, tannins, terpenes, phenolics and cardiac glycoside in all samples of selected plant extracts. Tannins, phenolics and glycoside were found only in the ethyl acetate extract of P.zeylanica. HPLC and GC-MS analysis of ethyl acetate leaf extract of P. zeylanica exposed ten major peaks and eleven compounds respectively. Chemical nature of the leaf extract was analysed by FT-IR spectrum. Conclusion: Ethyl acetate leaf extract of P. zeylanica showed better antimicrobial activity than other extracts as well as standard drugs. Therefore, this plant could be studied in detail for the identification of active biomolecules for antimicrobial agents.


2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Naseer Ali Shah ◽  
Muhammad Rashid Khan ◽  
Akhtar Nadhman

Leishmaniasis is an important parasitic problem and is in focus for development of new drugs all over the world. Objective of the present study was to evaluate phytochemical, toxicity, and antileishmanial potential ofJurinea dolomiaea,Asparagus gracilis,Sida cordata,andStellaria mediacollected from different areas of Pakistan. Dry powder of plants was extracted with crude methanol and fractionated withn-hexane, chloroform, ethyl acetate,n-butanol, and water solvents in escalating polarity order. Qualitative phytochemical analysis of different class of compounds, that is, alkaloids, saponins, terpenoids, anthraquinones, cardiac glycosides, coumarins, phlobatannins, flavonoids, phenolics, and tannins, was tested. Its appearance was observed varying with polarity of solvent used for fractionation. Antileishmanial activity was performed againstLeishmania tropicaKWH23 promastigote. Potent antileishmanial activity was observed forJ. dolomiaeamethanol extract (IC50=10.9±1.1 μg/mL) in comparison to other plant extracts. However,J. dolomiaea“ethyl acetate fraction” was more active (IC50=5.3±0.2 μg/mL) againstLeishmania tropicaKWH23 among all plant fractions as well as standard Glucantime drug (6.0±0.1 μg/mL). All the plants extract and its derived fraction exhibited toxicity in safety range (LC50 >100) in brine shrimp toxicity evaluation assay.


Author(s):  
Afshan Saleem ◽  
Arjumand Iqbal Durrani ◽  
Fatima Batool Awan ◽  
Amina Irfan ◽  
Misbah Noreen ◽  
...  

Functional foods are of great importance which are used to ensure improvements in human health by all aspects. A potential functional food was prepared with five different formulations A, B, C, D and E by using different combination of basil leaf, peppermint leaf and green cardamom to control hypertension. The raw material used for formulation wAS collected from the local market of Shahdara Lahore in September 2017. Selection of raw materials was totally based on the availability of specified bioactive components which can control hypertension. Formulations A, B, C, D and E were sensory evaluated. The overall acceptability for formulation A was 5/10, B was 6/10, C was 8/10, D was 9/10 and E was 7/10. On the basis of sensory analysis, formulation D was selected. For preliminary analysis, ethanolic and ethyl acetate fraction of basil leaf was prepared. Standard methods of phytochemical analysis were performed to identify flavonoids, alkaloids, polyphenolics and antioxidant activity. Antioxidant activity was measured by using DPPH assay. Quercetin was used as standard. Results were statistically analyzed which showed that IC50 (µg/mL) value of ethyl acetate fraction (389.00±0.99) was higher than the ethanolic extract (1372.00±6.32) of the basil leaf. On the basis of phytochemical analysis and DPPH assay. We formulated herbal tea that showed promising antioxidant properties. Characterization of food product proved it as potentially beneficial dietary supplement and hence recommended as potential functional food for hypertension. Keywords: Hypertension; Functional food; DPPH; Sensory Evaluation and Antioxidant activity.


Author(s):  
Veda Priya Gummadi ◽  
Mallikarjuna Rao Talluri ◽  
Keerthana Diyya ◽  
Ganga Rao Battu

Objective: Borassus flabellifer is an doub palm tree, different parts of it have been using as food and in traditional medicine. The root parts (rhizomes) are used for phytochemical analysis and evaluation of hepatoprotective and anti-tuberculosis activities.Materials: Hepatoprotective activity of Borassus flabellifer root extracts were studied on paracetamol-induced liver toxicity in rats and anti-tuberculosis activity on Mycobacterium tuberculosis [H37 Rv strain] quantitative determination using Microplate Alamar Blue assay (MABA) method.Results: The phytochemical analysis of different extracts B. flabellifer roots showed the presence of sterols, terpenoids, glycosides, carbohydrates, proteins, flavanoids, alkaloids, phenols, tannins, saponins and oils. The methanolic extract showed more phenolic and alkaloid contents on their quantification. Ethyl Acetate, Chloroform and Methanol extracts of B. flabellifer showed the dose dependent percentage protection of on paracetamol-induced liver toxicity. The methanol extract showed more activity and is comparable with standard drug Liv 52 on altered liver biomarker enzymes AST (SGOT), ALT (SGPT), ALP, total bilirubin and total protein levels with percentage protection 70.58%, 68.91%, 69.30% 71.18% and 70.73%. The ethyl acetate extract showed more anti-tuberculosis activity than methanol extract with MIC 6.25μg/mL but the extracts showed lower activity compared to standard drugs ciprofloxacin, Streptomycin and pyrazinamide of the MIC values are 6.25, 3.125, 3.125 μg/mL.Conclusion: B. flabellifer roots posses different phytochemical constituents and those extracts posses hepatoprotective and anti-tuberculosis activities 


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