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3 Polish Journal of Environmental Studies

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Vitality and implication of natural products from Viburnum Grandiflorum: an eco-friendly approach

100%

Suleman M. , Nouren S. , Hassan S. M. , Faiz A. H. , Sahr G. A. , Soomro G. A. , Tahir M. A. , Iqbal M. , Nazir A.

nr 3

In this study we screened Viburnum grandiflorum for bioactive secondary metabolites and biological activity. Secondary metabolites were detected by phytochemical tests, and biological activity was confirmed through antimicrobial and anti-oxidant assays. Phytochemical screening (alkaloidal, tannins, terpenoids, flavonoids, anthraquinones, and glycosides) was performed with methanol, and aqueous and ethyl acetate extracts. Antibacterial activity against four bacterial strains — staphylococcus auries, Escherichia Coli, Bacillus subtillus, and salmonella typhi – were measured. Methanolic extract showed maximum inhibitory activity with diameter of zone of inhibition (11.66 mm), followed by n-hexane extract (9.33 mm) and then ethyl acetate extract. Four different fungi (Penicillium chrysogenum, Aspergillus flavus, Rhodotorula mucilaginosa, and Stachybotrys chartarum) were also tested against plant stem extract using different solvents. Dimethyl sulfoxide extract showed a maximum zone of inhibition at 20 mg/ml. Anti-oxidant activity of stem extract of Viburnum grandiflorum was evaluated by 1, 1-diphenyl- 2-picryl-hydrazyl (DPPH). Then we measured absorbance, and percentage activity at each concentration was found for three solvent extracts to get Ic50 values. These data support Viburnum grandiflorum as having enough potential to be used safely as an antimicrobial drug.

Gamma radiation treatment for reducing cytotoxicity and mutagenicity in industrial wastewate

100%

Iqbal M. , Abbas M. , Arshad M. , Hussain T. , Khan A. U. , Masood N. , Tahir M. A. , Hussain S. M. , Bokhari T. H. , Khera R. A.

Polish Journal of Environmental Studies

2015

tom 24

nr 6

Estimating total phenolics in Taraxacum officinale (L.) extracts

80%

Khan A. S. , Arif K. , Munir B. , Kiran S. , Jalal F. , Qureshi N. , Hassan S. M. , Soomro G. A. , Nazir A. , Ghaffar A. , Tahir M. A. , Iqbal M.

Polish Journal of Environmental Studies

2019

tom 28

nr 1

This study focuses on evaluating total phenolic contents (TPC) in Taraxacum officinale (L.), a member of the family Asteraceae (compositae). The TPC were estimated by Folin-Ciocalteu’s reagent and gallic acid was taken as standard. The amount of phenolics was communicated as gallic acid equivalent (GAE). The TPC varied from 41.47 mg/g to 691.6 mg/g in the Taraxacum officinale (L.) extracts. The maximum phenolic contents were found in hydro-alcoholic extract (691.6 mg/g GAE) in comparison with aqueous extract. These extracts have a significant role as antibacterial and antimicrobial agents.