Your browser doesn't support javascript.
loading
Montrer: 20 | 50 | 100
Résultats 1 - 2 de 2
Filtrer
Plus de filtres








Gamme d'année
1.
Indian J Exp Biol ; 2011 Dec; 49(12): 925-931
Article de Anglais | IMSEAR | ID: sea-145210

RÉSUMÉ

Removal of heavy metal chromium was carried out using the fungus Fusarium oxysporum NCBT-156 strain isolated from soil of leather tanning effluent in in situ condition using potassium dichromate solution with 10 per cent Czapek-dox liquid medium. Biosorbent matrix was developed using Carica papaya plant dry stem to colonize the fungal strain to facilitate bioabsorption process. Bioabsorption of chromium was by metabolically mediated intracellular accumulation process. Maximum efficiency of chromium removal by biosorption upto 90 per cent was achieved at the end of 5th day of incubation (120 h of contact time) for 100 and 200 ppm concentration, upto 80 per cent for 300 and 400 ppm, and upto 65 per cent for 500 ppm to 1000 ppm concentrations with pH ranging from 5.8, 5.6, 5.5, 5.4 and 5.2, respectively for 100, 200, 300, 400, 500-1000 ppm concentration. SDS-PAGE protein profile showed significant difference in 34 kDa protein band after chromium absorption by the fungus. ftir spectroscopic analysis revealed that the main functional groups involved in the uptake of chromium by F. oxysporium strain were carbonyl, carboxyl, amino and hydroxyl groups.

2.
Indian J Exp Biol ; 2003 Dec; 41(12): 1473-5
Article de Anglais | IMSEAR | ID: sea-56409

RÉSUMÉ

Efficacy of three different concentrations (5, 10 and 15 mg/ml) of dry flower powder of E. splendens and L. nepetaefolia was tested on the growth of aflatoxin-producing toxigenic strains of fungi A. flavus (NCBT 101) and A. parasiticus (NCBT 128) in Sabouraud dextrose agar medium (SDA). Maximum (75%) inhibition of growth of A. flavus was seen at 15 mg/ml concentration of E. splendens flower dry powder, while A. parasiticus showed 50% inhibition of growth at 10 and 15 mg/ml concentrations. Total inhibition (100%) of growth of A. flavus was seen at 10 and 15 mg/ml for L. nepetaefolia and maximum (75%) inhibition of growth was seen for A. parasiticus at 15 mg/ml concentration. Bioassay with groundnut seeds soaked with different concentrations of flower extract proved that both fungi were incapable of infecting the seeds at 10 and 15 mg/ml of L. nepetaefolia flower extracts.


Sujet(s)
Aflatoxines/biosynthèse , Aspergillus/classification , Euphorbia/composition chimique , Lamiaceae/composition chimique , Tests de sensibilité microbienne , Spécificité d'espèce
SÉLECTION CITATIONS
DÉTAIL DE RECHERCHE