Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by S. Vikineswary
Total Records ( 3 ) for S. Vikineswary
  M. Daker , N. Abdullah , S. Vikineswary and U.R. Kuppusamy
  This study was aimed to evaluate the antioxidant properties of methanol extracts of fermented substrates optimised for antioxidant production by Marasmiellus sp. KUM 50061 mycelial biomass. Extract of fermented maize supplemented with (w/w) malt extract 4%, yeast extract 4% and rice bran 4% exhibited the highest 1,1diphenyl-2-picrylhydrazyl radical scavenging ability. The effective concentration of extract to scavenge 50% radicals was 1.875 mg mL-1. This formulation was chosen as the optimum substrate for antioxidant production by Marasmiellus sp. KUM 50061 mycelial biomass. The thiobarbituric acid reactive substance (TBARS) assay showed that the effective concentration to inhibit lipid peroxidation of buffered egg yolk by 50% was 6.00 mg mL-1. Total phenolics amounted to 31.41±1.56 mg GAE g-1 extract as measured by the Folin-Ciocalteau method.
  Y.S. Low , Noorlidah Abdullah and S. Vikineswary
  This study was aimed to evaluate the advantages of immobilization of Pycnoporus sanguineus on Ecomat for mycelial biomass yield, laccase production and hence, polycyclic aromatic hydrocarbons (PAHs) degradation. The addition of polycyclic aromatic hydrocarbons standard mixture increased the mycelial biomass yield of both immobilized and free mycelia of P. sanguineus with the highest dry weight obtained at 10 days of incubation of 0.46 and 1.88 g, respectively. The immobilized mycelia culture degraded 88% of phenanthrene, 93% of anthracene and 85% of pyrene within 20 days. In comparison, free mycelia culture rapidly degraded 42% of phenanthrene, 92% of anthracene and 87% of pyrene at the end of 20 days incubation period. The high correlation between the amounts of polycyclic aromatic hydrocarbons degraded and laccase activity of both immobilized and free mycelia culture indicated possible involvement of laccase in polycyclic aromatic hydrocarbons degradation.
  Jaime Y.S. Low , Noorlidah Abdullah and S. Vikineswary
  The ability of white rot fungus Pycnoporus sanguineus to colonize support materials and subsequently produce laccase and degradation of Polycyclic Aromatic Hydrocarbons (PAHs) was compared with free mycelia culture. Natural support, Ecomat, was found to be the best support material for P. sanguineus for mycelial colonization and laccase activity with maximum activity of 39 nkat mL-1 on day nine of incubation. Coconut husk and grey scouring sponge produces maximum laccase activity of 9.17 and 6.67 nkat mL-1, respectively on day 15. Pycnoporus sanguineus immobilized culture exhibited higher PAHs degradation efficiency compared to the free mycelia culture during the 20 days of incubation. The immobilized mycelia culture degraded 88% of phenanthrene, 93% of anthracene and 85% of pyrene within 20 days. The good correlation between the amount of PAHs degraded and laccase activity produced in the immobilization medium indicated that laccase was solely responsible for degradation of the three PAHs tested. In comparison, free mycelia culture rapidly degraded 42% of phenanthrene, 92% of anthracene and 87% of pyrene at the cessation of incubation. However, poor correlation between the amount of PAHs degraded and laccase activity measured in the free cell culture was obtained. This suggested that intracellular enzymes could be involved in PAHs degradation in the free cell culture.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility