scholarly journals In vitro antioxidant potential and antimicrobial activity of leaves and stem extracts of Anogeissus pendula Edgew.

2021 ◽  
Vol 8 (4) ◽  
Author(s):  
Priyanka Danai ◽  
Varsha Pandey ◽  
Teena Agrawal
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Methanol Extract ◽  
Total Phenolic ◽  
Peroxide Radical ◽  
Bacterial Strains ◽  
Tannin Content ◽  
Hydroalcoholic Extract ◽  
Anogeissus Pendula

Anogeissus pendula Edgew. is commonly used in the conventional Indian medicinal system and is reported to contain phenolic compounds which have antioxidant and antimicrobial potential. The goal of our study is to look at the antioxidant function and antibacterial activity of A. pendula leaf and stem extracts. The total phenolic content (TPC), total flavonoid content (TFC) and total tannin content (TTC) were determined using a spectrophotometric technique (TTC). In vitro techniques such as 1, 1-diphenyl-2-picrylhydrazyl (DPPH), hydrogen peroxide radical scavenging tests (H2O2) and Ferric reducing antioxidant power (FRAP) assay were used in the study. The disc diffusion technique was used to assess antibacterial activity and the minimum inhibitory concentration (MIC) was investigated against four bacterial strains. The TTC of leaf and stem methanol extract was considerably higher which ranged from 15.07 ± 0.506 to 38.77 ± 1.253 mg gallic acid equivalent (GAE) /g in leaves and 19.83 ± 0.084 to 28.56 ± 0.437 mg GAE/g in the stem. The content of flavonoid in the leaf and stem methanol extract varied from 12.53 ± 0.603 to 37.28 ± 0.466 mg rutin equivalent (RE) /g in leaves and 10.01 ± 0.177 to 37.28 ± 0.466 mg RE/g in stems. Hydroalcoholic extract of leaf and stem showed the highest tannin content and ranged from 23.73 ± 0.091 to 34.08 ± 0.261 mg tannic acid equivalent (TAE) /g. In order of efficacy (IC50) of the plant extracts, the effective inhibitor was the methanol extract of leaf and stem in the DPPH and H2O2 assay. FRAP value was higher in the hydroalcoholic extract of both leaf and stem. Antimicrobial activity tests revealed that all extracts limit the development of diverse microbial strains such as Escherichia coli, Bacillus subtilis, Pseudomonas putida and Streptococcus aureus with a mean zone of inhibition ranging from 0 to 15.67 mm. The MIC of A. pendula leaf and stem solvent extracts against bacterial strains ranged from 0.195 to 50 mg/ml. The findings revealed that A. pendula has a variety of phytochemicals with substantial antioxidant and antibacterial properties, confirming its usage in traditional medicine.

The Comparative Study of Equisetum pratense, E. sylvaticum, E. telmateia: Accumulation of Silicon, Antioxidant and Antimicrobial Screening

2019 ◽  
Vol 70 (7) ◽  
pp. 2519-2523
Author(s):  
Denisa Batir Marin ◽  
Oana Cioanca ◽  
Mihai Apostu ◽  
Cristina Gabriela Tuchilus ◽  
Cornelia Mircea ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Methanol Extract ◽  
Previous Treatment ◽  
Total Phenolic ◽  
Quantitative Chemical Analysis ◽  
Qualitative And Quantitative ◽  
Antioxidant And Antimicrobial Activity ◽  
The Comparative Study

The objective of the current study is represented by the determination of silica and a phytochemical screening of phenolic derivates of some Equisetum species. The antioxidant and antimicrobial activity for Equisetum pratense Ehrh.,, Equisetum sylvaticum L. and Equisetum telmateia Ehrh. (sin. Equisetum maximum Lam.) were also investigated. The concentration of silicon (Si) in plants was determined by the spectrophotometric method using previous treatment with NaOH 50% both for the stem and the nodal branches [1]. Results obtained varied from 95.12 to 162.10 SiO2 mg/g dry plant which represents 4.44% to 7.58% Si/100g dry sample. Two types of total extracts were obtained using different solvents and were subjected to qualitative and quantitative chemical analysis considering total phenolic content [2]. The highest concentration of investigated compounds was found in the methanolic extract, E. sylvaticum, 196.5mg/g dry sample. Antioxidant activity was monitored spectrophotometrically and expressed in terms of IC50 (�g/mL) [3]. Values gathered ranged from 261.7 to 429.5 �g/mL. The highest capacity to neutralized DPPH radicals was found in E. sylvaticum. In vitro antimicrobial activity was determined using difusimetric method [4]. Testing was performed on four microorganisms: three strains of bacteria and one species of fungi. Different effects were noticed against the bacteria, furthermore the methanol extract appeared to be most efficient. All extracts showed significand antimicrobial activity against Staphylococcus aureus (ATCC 25923) and Candida albicans (ATCC 90028) and weak to no activity against Pseudomonas aeruginosa (ATCC 27853) and Escherichia coli (ATCC 25922).

scholarly journals Novel 2,4,6-Trimethylbenzenesulfonyl Hydrazones with Antibacterial Activity: Synthesis and In Vitro Study

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2723
Author(s):  
Łukasz Popiołek ◽  
Sylwia Szeremeta ◽  
Anna Biernasiuk ◽  
Monika Wujec
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Potential Application ◽  
Antimicrobial Agents ◽  
Inhibitory Concentration ◽  
Condensation Reaction ◽  
In Vitro Study ◽  
In Vitro Bioactivity ◽  
Bacterial Strains

This research describes the synthesis and in vitro antimicrobial activity study of a series of 2,4,6-trimethylbenzenesulfonyl hydrazones. Twenty-five hydrazones (2–26) were synthesized on the basis of condensation reaction. The in vitro bioactivity study confirmed the potential application of obtained derivatives as antimicrobial agents. Among the tested compounds, the highest activity was discovered for derivative 24, which possessed minimal inhibitory concentration (MIC) ranging from 7.81 to 15.62 µg/mL against Gram-positive reference bacterial strains. Synthesized benzenesulfonyl hydrazones can be applied as potential ligands for the synthesis of bioactive metal complexes.

A COMPARATIVE STUDY OF IN VITRO ANTIMICROBIAL ACTIVITY AND TLC STUDIES OF PETALS OF SELECTED INDIAN MEDICINAL PLANTS

2016 ◽  
Vol 9 (5) ◽  
pp. 259 ◽  
Author(s):  
Sumathy Rengarajan ◽  
Vijayalakshmi Melanathuru ◽  
Deecaraman Munuswamy ◽  
Sankaranarayanan Sundaram ◽  
Saravanan Thiruverkadu Selvaraj
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Medicinal Plants ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Methanol Extract ◽  
Phytochemical Screening ◽  
Layer Chromatography ◽  
Indian Medicinal Plants

ABSTRACTObjective: The present study was to evaluate the in vitro antibacterial activity, and thin-layer chromatography (TLC) studies from the petals of fourdifferent Indian medicinal plants (Punica granatum, Hibiscus rosa-sinensis, Cassia auriculata, and Moringa oleifera).Methods: The phytochemical screening of the methanol extract of petals of four different Indian medicinal plants was performed using standardprocedures. The antimicrobial activity was tested against various test organisms using the agar disc diffusion method.Results: The preliminary phytochemical screening for petals of four different medicinal plants revealed the presence of flavonoids, alkaloids, tannins,and saponins. From the above study, the results indicated that the methanol extract of M. oleifera petals showed the highest antimicrobial activityagainst Staphylococcus aureus and Bacillus subtilis with zone of inhibition 17.93 and 23.40, respectively, at the concentration of 20 µl/ml and alsoshowed the maximum inhibitory activity at the highest concentration (20 µl/ml) than the lowest concentration (5 µl/ml) against Gram-negativebacteria such as Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa, and Gram-positive B. subtilis and S. aureus. TLC studies of methanolextracts of petals of Indian medicinal plants revealed the presence of different phytoconstituents as evidenced by separated compounds with differentRf values.Conclusion: The results obtained in the present study indicate that the petals of four different Indian medicinal plants showed the highest antibacterialactivity and can be used as an antibacterial agent against bacterial diseases.Keywords: Phytochemicals, Antibacterial activity, Thin-layer chromatography.

scholarly journals Nigritanine as a New Potential Antimicrobial Alkaloid for the Treatment of Staphylococcus aureus-Induced Infections

Toxins ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 511 ◽  
Author(s):  
Bruno Casciaro ◽  
Andrea Calcaterra ◽  
Floriana Cappiello ◽  
Mattia Mori ◽  
Maria Loffredo ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Biological Activities ◽  
Human Keratinocytes ◽  
Chemical Diversity ◽  
Bioactive Molecules ◽  
Bacterial Strains ◽  
Wide Range

Staphylococcus aureus is a major human pathogen causing a wide range of nosocomial infections including pulmonary, urinary, and skin infections. Notably, the emergence of bacterial strains resistant to conventional antibiotics has prompted researchers to find new compounds capable of killing these pathogens. Nature is undoubtedly an invaluable source of bioactive molecules characterized by an ample chemical diversity. They can act as unique platform providing new scaffolds for further chemical modifications in order to obtain compounds with optimized biological activity. A class of natural compounds with a variety of biological activities is represented by alkaloids, important secondary metabolites produced by a large number of organisms including bacteria, fungi, plants, and animals. In this work, starting from the screening of 39 alkaloids retrieved from a unique in-house library, we identified a heterodimer β-carboline alkaloid, nigritanine, with a potent anti-Staphylococcus action. Nigritanine, isolated from Strychnos nigritana, was characterized for its antimicrobial activity against a reference and three clinical isolates of S. aureus. Its potential cytotoxicity was also evaluated at short and long term against mammalian red blood cells and human keratinocytes, respectively. Nigritanine showed a remarkable antimicrobial activity (minimum inhibitory concentration of 128 µM) without being toxic in vitro to both tested cells. The analysis of the antibacterial activity related to the nigritanine scaffold furnished new insights in the structure–activity relationships (SARs) of β-carboline, confirming that dimerization improves its antibacterial activity. Taking into account these interesting results, nigritanine can be considered as a promising candidate for the development of new antimicrobial molecules for the treatment of S. aureus-induced infections.

Synthesis and Antibacterial Activity of Novel Schiff Base Containing Diacetylferrocene and 2-Amino-5-Alkyl-1,3,4-Thiadiazole

2011 ◽  
Vol 396-398 ◽  
pp. 241-245
Author(s):  
Yu Ting Liu ◽  
Ming Tao Zhao ◽  
Da Wei Yin ◽  
Bo Ning Hui
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Schiff Base ◽  
1H Nmr ◽  
Acetyl Chloride ◽  
Bacterial Strains ◽  
Spectral Techniques ◽  
Chemical Structures

A series of novel Schiff base containing diacetylferrocene and 5-alkyl-2-amino-1,3,4 -thiodizoles were reported in this paper. Diacetylferrocene(Ⅱ) was synthesised with ferrocene(Ⅰ) and acetyl chloride with AlCl3 as catalyst in CH2Cl2. In the presence of diacetylferrocene and 5-alkyl-2-amino-1,3,4-thiodizole reacted under solvent and catalyst condition to furnish Schiff base containing diacetylferrocene and 5-alkyl-2-amino-1,3,4-thiadiazoles(Ⅲ). Chemical structures have been confirmed by elemental annalysis and the spectral techniques of FTIR,1H NMR. Antimicrobial activity (in vitro) was evaluated against the two pathogenic bacterial strains. The compounds have shown better activity.

scholarly journals Phytochemical Analysis, Antioxidant and Antimicrobial Screening of Seriphidium Oliverianum Plant Extracts

Dose-Response ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 155932582110047
Author(s):  
Ali Abbas ◽  
Syed Ali Raza Naqvi ◽  
Muhammad Hidayat Rasool ◽  
Asma Noureen ◽  
Muhammad Samee Mubarik ◽  
...  
Keyword(s):  
Methanol Extract ◽  
Reducing Power ◽  
Antibacterial Activities ◽  
Total Phenolic ◽  
Phytochemical Analysis ◽  
Bacterial Strains ◽  
Zone Of Inhibition ◽  
Dpph Scavenging

The aim of this study was to investigate the phytochemicals using reverse-phase high pressure liquid chromatography (RP-HPLC), antioxidant, antifungal and antibacterial activities of Seriphidium oliverianum stem extracts. The extraction was carried out by conventional shaking process (CSP) and ultrasonic assisted process (UAP). The highest total phenolic contents (97.85 ± 0.735 mg gallic acid equivalent (GAE)/g sample) and flavonoid contents (188.15 ± 0.53 mg catechin equivalent (CE)/g sample) were found in methanol extract obtained by CSP. Antioxidant activity was investigated using DPPH° scavenging assay and reducing power assay. Methanol extract using UAP showed the highest DPPH° scavenging activity (79.95% ± 1.80%) followed by methanol and butanol extracts obtained through CSP. Moreover, methanol extracts using CSP showed highest reducing activity (1.032 ± 0.0205 absorbance). In-vitro antimicrobial activity was studied using most common infection causing fungal and bacterial strains. Anti-fungal activity of methanol extract using CSP showed the highest zone of inhibition (10.5 mm) against F. avenaceum fungal strain, while aqueous extracts obtained through showed the highest antibacterial activity (22 ± 1.32 mm zone of inhibition) against S. aureus. The results showed that the methanol stem extract of S. oliverianum is a valued candidate for further screening and could be processed for in-vivo infection induced animal trials.

Comparative studies on polyphenolic profile and antimicrobial activity of propolis samples selected from distinctive geographical areas of Hungary

2017 ◽  
Vol 23 (4) ◽  
pp. 349-357 ◽  
Author(s):  
Szabolcs Molnár ◽  
Kata Mikuska ◽  
Katalin Patonay ◽  
Krisztina Sisa ◽  
Hussein G Daood ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Industrial Applications ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Total Phenolic ◽  
Bacterial Strains ◽  
Ethanolic Extracts

The present paper reports about a comparative survey on the chemical composition, antioxidant activity and in vitro antimicrobial activity of selected propolis samples collected in Hungary. The total levels of polyphenolic compounds including flavonoids in ethanolic extracts of propolis were assessed. The major constituents of ethanolic extracts of propolis were analysed by gas chromatography/mass spectrometry analysis. Total phenolic content was determined spectrophotometrically using a Folin–Ciocalteu reagent. Free radical scavenging activities were evaluated by means of 2,2-diphenyl-1-picrylhydrazyl assay. In vitro inhibitory activity was investigated against eight different bacterial strains by agar well diffusion assay. An extensive comparison was carried out regarding general parameters and specific polyphenolic components. The experimental data led to the observation that there is considerable variability in terms of the quality and the biological value of the distinctive propolis samples. These findings confirm the hypothesis of the study; versatile experimental results are required for proper, well-reasoned, balanced and standardised industrial applications. The major flavonoid components were found to be chrysin and pinocembrin; however, versatile minor components were also detected. The total polyphenol content of ethanolic extracts of propolis ranged between 104.6 mg/g and 286.9 mg/g (gallic acid equivalent). The radical scavenging activity of ethanolic extracts of propolis varied between 101.7 mg/g and 286.9 mg/g (ascorbic acid equivalent). As the quality of propolis depends on the season, vegetation and the area of collection, marked differences were found among the different products examined in terms of both composition and general characteristics. The studied samples exhibited significant differences in term of antimicrobial activities.

scholarly journals In vitro antibacterial activity of essential oils from Lamiaceae species

2016 ◽  
Vol 5 (4) ◽  
pp. 141-144
Author(s):  
Vinod Kumar ◽  
◽  
C. S. Mathela ◽  
Amit Panwar ◽  
◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Essential Oils ◽  
Broad Spectrum ◽  
Antibacterial Effect ◽  
Gram Negative Bacteria ◽  
Bacterial Strains ◽  
Gram Negative ◽  
In Vitro Antibacterial Activity

Essential oils from Calamintha umbrosa and Nepeta species viz. N. leucophylla; N. hindostana; N. ciliaris and N. clarkei (family Lamiaceae), was tested against six bacterial strains. To evaluate the correlation between the antimicrobial activity and the essential oils, PCA and HCA analysis was done. PCA and HCA analysis of the antibacterial activity revealed that essential oils of Nepeta species had a strong and broad spectrum antibacterial effect against bacterial strains of P. aeruginosa and S. scandidus. The N. leucophylla oil showed higher activity against Gram-negative bacteria P. aeruginosa (10.5 mm, MIC 10 µL/mL) and K. pneumonia (9.1 mm, MIC 45 µL/mL) among all Nepeta oils which may be due to presence of active antimicrobial iridoids compounds.

Antimicrobial Activity of Highly Fluorinated Thiocarbamates and Dithiocarbamates

2019 ◽  
Vol 13 (2) ◽  
pp. 120-128
Author(s):  
Amal Thebti ◽  
Ines Chniti ◽  
Med Abderrahmane Sanhoury ◽  
Ikram Chehidi ◽  
Hadda Imene Ouzari ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antimicrobial Agents ◽  
Fungal Species ◽  
Penicillium Expansum ◽  
Bacterial Strains ◽  
Widespread Occurrence ◽  
Antibacterial And Antifungal

Background:The widespread occurrence of resistance to current antibiotics has triggered increasing research efforts to design and develop innovative antibacterial and antifungal agents that could overcome such antimicrobial resistance.Objective:The aim of this work was the in vitro evaluation of twelve highly fluorinated Nmonosubstituted thiocarbamates and dithiocarbamates and six non-fluorinated analogs against nine bacterial strains and three fungal species.Methods:The in vitro antimicrobial activity against the tested microrganisms was evaluated using the microdilution broth method.Results:Escherichia coli ATCC 8739, Salmonella sp., Staphylococcus aureus 6539 and all the three fungi (Aspergillus niger, Aspergillus flavus and Penicillium expansum) exhibited the highest rate of susceptibility, whilst Enterococcus faecuim ATCC 19436 and particularly Escherichia coli DH5α were less susceptible. Thiocarbamate (1i) and dithiocarbamate (2i) showed both the lowest MIC values (3.9 µg/mL) and the widest spectrum of antibacterial activity. Furthermore, the N-ethyl derivatives inhibited more efficiently the growth of bacteria than N-aryl analogs.Conclusion:The fluorinated compounds showed, in general, a relatively more potent antibacterial activity than non-fluorinated counterparts. The results indicate that these thiocarbamates and dithiocarbamates could be promising candidates as potential antimicrobial agents.

In vitro Evaluation of the Antimicrobial activity of Methanolic and Aqueous extract of Mucuna pruriens seed

2021 ◽  
pp. 4212-4214
Author(s):  
Amita Shobha Rao ◽  
Shobha K L ◽  
Preethi Lavina Concessao ◽  
Gowrish Rao S ◽  
Sreedhara R Pai K
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Klebsiella Pneumoniae ◽  
Aqueous Extract ◽  
Methanol Extract ◽  
Mucuna Pruriens ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Clinical Strains

The present investigation was to find out efficacy of Mucuna pruriens (M. pruriens) seeds. The antimicrobial activity of methanol and aqueous extract of M. pruriens seeds was determined by well diffusion method with ATCC strains of gram positive and gram negative bacteria clinical strains of multidrug resistant (MDR) Klebsiella pneumoniae, and clinical strains of Candida albicans. It was observed that both the aqueous and the methanol extract of M. pruriens seeds had antibacterial activity against all the ATCC bacterial strains. The MDR strain of Klebsiella pneumoniae was resistant to both aqueous and methanol extract of M. pruriens seed. Antifungal activity against Candida albicans was exhibited by both aqueous and methanol extracts of M. pruriens seed.

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