Biomedical subjects

Supratim Ray

Publications and source records attributed to Supratim Ray.

3 recordsLinked to original sources

PubMed2003

Human ECoG analysis during speech perception using matching pursuit: a comparison between stochastic and dyadic dictionaries.

We use the matching pursuit (MP) algorithm to detect induced gamma activity in human EEG during speech perception. We show that the MP algorithm is particularly useful for detecting small power changes at high gamma frequencies (> 70 Hz). We also compare the performance of the MP using a stochastic versus a dyadic dictionary and show that despite the frequency bias the time-frequency power plot (averaged over 100 trials) generated by the dyadic MP is almost identical (> 98.5%) to the one generated by the stochastic MP. However, the dyadic MP is computationally much faster than the stochastic MP.

Algorithms↗

PubMedDate not supplied

A study on ceftriaxone-induced lipid peroxidation using 4-hydroxy-2-nonenal as model marker.

4-Hydroxy-2-nonenal, an indicator of lipid peroxidation process. was used as model marker to explore ceftriaxone-induced lipid peroxidation in goat liver homogenate. Ceftriaxone was found to induce lipid peroxidation significantly. It was further found that ascorbic acid could significantly arrest ceftriaxone-induced lipid peroxidation. The results corroborate the earlier findings with malondialdehyde as model marker.

Aldehydes↗

PubMedDate not supplied

Evaluation of ascorbic acid as suppressor of cyclophosphamide induced lipid peroxidation using common laboratory markers.

The present study deals with exploration of lipid peroxidation induction capacity of cyclophosphamide, an anticancer drug, and in vitro evaluation of ascorbic acid as a suppressor of cyclophosphamide induced lipid peroxidation. Goat liver homogenate has been used as the lipid source. This evaluation was done by measuring the malondialdehyde, 4-hydroxy-2-nonenal, reduced glutathione and nitric oxide content of the tissue as markers of lipid peroxidation. The study revealed that ascorbic acid could suppress the drug induced lipid peroxidation to a significant extent.

Aldehydes↗