EFFECT OF SODIUM SELENITE AND VITAMIN E SUPPLEMENTATION ON GROWTH AND SERUM MINERALS PROFILE OF PIGS (SUS DOMESTICUS)

To assess the effect of sodium selenite and vitamin E supplementation on growth and serum minerals, twenty male large white Yorkshire pigs of similar age (2-3 months) and body weight (14.96 ± 0.68 kg average) were randomly divided into four equal groups. Group I served as control (without any supplementation), whereas animals in groups II and III were supplemented with 0.3 mg selenium kg-1 DM as sodium selenite, 100 mg of vitamin E as DL-α-tocopheryl acetate, respectively. Piglets in group IV were supplemented with both 0.3 ppm Se as sodium selenite and 100 mg of vitamin E as DL-α-tocopheryl acetate. This experimental feeding lasted for 120 days, during which fortnightly bodyweight changes were recorded. Blood samples were collected at day 0 and day 120. There was significant (P<0.05) increase in serum Se concentration in supplemented groups than control. Average daily gain and serum calcium, phosphorus, iron, copper, zinc, manganese were similar (P>0.05) among the four groups. The results suggest that supplementation of 0.3 ppm Se as sodium selenite and 100 mg of vitamin E may enhance the serum Se concentration without affecting body weight gain and other serum minerals of pigs

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Twisted helical Tape's impact on heat transfer and friction in zinc oxide (ZnO) nanofluids for solar water heaters: Biomedical insight

This study explores the influence of Zinc Oxide (ZnO) nanofluids on solar water heaters with Dimple Tubes and Helical Twisted Tape (DTHTT) surfaces. The helical twisted tape design enhances turbulence, improving nanofluid mixing and thermal exchange. Computational fluid dynamics (CFD) validates the efficiency of the parabolic trough solar water heater (PTSWH) with emphasis on solar light concentration and feed water flow velocity. Optimal conditions include a 0.3% ZnO nanofluid volume concentration, mass flow rates between 1.0 kg/min and 5.0 kg/min, and copper-type twisted helical tapes. Experimental results reveal Nusselt number enhancements of 15.1% and 20.96% at H/D = 10, and 16.72% and 32.12% at H/D = 3, for 0.3% ZnO nanofluid, at Reynolds numbers from 3000 to 8000. The twisted tape arrangement at H/D = 3 exhibits increased fluid mixing, leading to higher convective heat transfer. Friction factor enhancements at Reynolds numbers 3000 and 8000 are 0.26% and 0.38%, respectively, compared to the base fluid. At a 3.0 kg/min mass flow rate, thermal efficiency increases to 39.25%, a 13.25% gain over plain tapes. The model shows a ±3.24% deviation from the expected friction factor, with a total ±1.2% discrepancy between experimental and simulated findings, remaining within an acceptable range