RESUMEN
Power electronic converters are becoming more critical as renewable energy sources are linked to distributed generation systems. In this study, a "Two-Tier Converter" for high voltage gain with a low duty ratio, low voltage stress for the given voltage gain, continuous input current, and a grounded load arrangement have been made from two stages of a conventional boost converter. The analysis, modes of operation, and effects of the inductors' internal resistances on voltage gain have been discussed. The advantages of the two-tier converter have also been established by comparison studies with other modern high-gain converters. The suggested converter has also been evaluated using stability analysis, PI, and super-twisting sliding mode control (STSMC) to regulate the output voltage at a constant value. The effectiveness of the suggested configuration with the suggested control approach has been demonstrated through simulation and experimental investigation.
RESUMEN
The goal of this study was to develop and characterize a cell line from the caudal fin tissue of zebrafish and also its application as an in vitro model to study the effect of H2 O2 in wound healing. Fibroblastic cell line was developed using explant culture method from caudal fin tissue of zebrafish and characterized. This cell line was named as DrF cell line. The DrF cells treated with 0-10 µM/ml H2 O2 were tested for viability, proliferation and motility by MTT assay, trypan blue assay and chemotaxis assay, respectively. Among the different concentrations of H2 O2 , 4 µM was found to be nontoxic to study cell migration in in vitro scratch wound assay. Furthermore, the expression of proliferating cell nuclear antigen (PCNA) and chemokine receptor (CXCR4) genes was carried by qPCR. The cell survival, proliferation and migration were extremely enriched at 4 µM level of H2 O2 . We observed accelerated wound closure in DrF cells treated with H2 O2. The qPCR results indicated that H2 O2 markedly up-regulated mRNA expression of PCNA and CXCR4. The findings from our study suggest that H2 O2 at low levels promotes cell survival, proliferation, migration and wound healing in DrF cells.
