Publications by authors named "M Velan"
Article Synopsis
- Fulminant onset COVID-19 refers to the rapid development of organ dysfunction, such as respiratory failure or shock, within 4 days of symptom onset, and has not been extensively studied.
- In a study of 2,016 COVID-19 patients in South India, 32.4% experienced fulminant onset, with significant predictors including age over 60, hypertension, and immune suppression.
- Patients with fulminant onset had a higher risk of mortality and required more organ support within 30 days, highlighting the need for this variant to be recognized in COVID-19 treatment and management.
A study on bioremediation of soil contaminated with petroleum sludge was performed using Bacillus pumilus/MVSV3 (Accession number JN089707). In this study, 5 kg of agricultural soil was mixed well with 5% oil sludge and fertilizers containing nitrogen, phosphorus and potassium (N:P:K). The treatment resulted in 97% removal of total petroleum hydrocarbon (TPH) in 122 d in bacteria mixed contaminated soil when compared to 12% removal of TPH in uninoculated contaminated soil.
View Article and Find Full Text PDFThe overproduction of enzymes was performed by manipulating the medium components. In our study, solvent-tolerant thermophilic lipase-producing Bacillus coagulans was isolated from soil samples and a stepwise optimization strategy was employed to increase the lipase production using coconut oil cake basal medium. In the first step, the influence of pH, temperature, carbon source, nitrogen source and inducers on lipase activity was investigated by the One-Factor-At-A-Time (OFAT) method.
View Article and Find Full Text PDFBiosorption of lead by Kluyveromyces marxianus immobilized in alginate beads.
J Environ Biol
September 2013
The uptake and recovery of Pb (II) ions were investigated by using sodium alginate beads. Biosorption experiments are carried out in batch mode. The experimental results showed that the beads were effective in removing Pb (II) ions from solution.
View Article and Find Full Text PDFUnlabelled: BACKGROUND, AIM, SCOPE: Treatment of wastewater has become significant with the declining water resources. The presence of recalcitrant organics is the major issue in meeting the pollution control board norms in India. The theme of the present investigation was on partial or complete removal of pollutants or their transformation into less toxic and more biodegradable products by heterogeneous Fenton oxidation process using mesoporous activated carbon (MAC) as the catalyst.
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