Antioxidant and Antimicrobial Activity Evaluation of Polyhydroxycinnamic Acid Ester Derivatives.

Novel acyclic and cyclic merocyanine dyes derived from the nucleu of furo [(3,2-d) pyrazole; ( d 2 , 3 )imidazole]were prepared. The electronic visible absorptionspectra of all the synthesized new cyanine dyes were examined in 95% ethanolsolution to evaluate their photosensitization properties. Antibacterial andantifungal activities for some selected dyes were tested against various bacterialand fungal strains (Escherichia coli, Staphylococcus aureus, Aspergillus flavus andCandida albicans) to evaluate their antimicrobial activity. Structural identificationwas carried out via elemental analysis, visible spectra, IR and 1H NMRspectroscopic data.

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Preparation Of Tulasi, Aloe Vera And Turmeric Formulation And Its Antioxidant And Antimicrobial Activity

International Journal of Pharmaceutical Research ◽

10.31838/ijpr/2020.sp1.439 ◽

2020 ◽

Vol 12 (sp1) ◽

Keyword(s):

Antimicrobial Activity ◽

Aloe Vera ◽

Antioxidant And Antimicrobial Activity

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

Revista de Chimie ◽

10.37358/rc.19.7.7372 ◽

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).

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