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| Articles
by
Smita Chaudhry |
Total Records (
2 ) for
Smita Chaudhry |
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Smita Chaudhry
,
Jyoti Luhach
,
Vandana Sharma
and
Chetan Sharma
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Application of micro organisms for effective removal of hydrocarbon contamination
from soil has been considered by several workers since decontamination of polluted
soil by other methods leads to production of toxic compounds and these techniques
are non-economic also. In the present study, soil samples from five different
petroleum sludge contaminated sites were studied for assessment of their diesel
degrading potential. The average heterogeneous fungal count in different soil
samples ranged from 35.67±5.69 to 51.33±7.64 and the average count
of diesel utilizing fungi ranged from 3.33±1.15 to 26.00±4.00.
Total heterogeneous fungal count and diesel utilizing fungal count varied significantly
in sludge production and disposal site, as compared to control soil. Thirteen
native fungi species of six fungal genera were isolated from different soil
samples. The identified fungal genera included Aspergillus, Fusarium, Cladosporium,
Penicillium, Rhizopus and Alternaria. Biodegradation ability of all
isolates was confirmed by shake flask culture and vapour phase transfer method.
The results showed that indigenous fungal isolates Aspergillus sp.,
Alternaria sp., Penicillium sp. and Fusarium sp.
displayed highest capability for biodegradation of diesel. Hence, these
fungal species can be used for bioremediation of sludge and diesel contaminated
sites. |
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Sahaj Kaur
,
Chetan Sharma
,
Smita Chaudhry
and
Robina Aman
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In the present study a comparison on antimicrobial potency of three common weeds i.e. Cannabis sativa, Parthenium hysterophorus and Calotropis procera, were tested by agar well diffusion method against the six common pathogens namely, Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, Candida albicans and Saccharomyces cerevisiae. The in vitro study revealed that organic leaves extract of weeds were more effective than aqueous extract. Among the three tested weeds, methanolic extract of C. sativa was found to be most effective as compare to other weeds. It showed maximum zone of inhibition of 26.3 and 25.6 mm against Bacillus subtilis and Staphylococcus aureus with lowest MIC of 1.56 mg mL‾1. This study revealed that the organic leaves extract of C. sativa showed good antibacterial activity and can be explored for developing antibacterial drugs. |
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