Evaluation of the Total Antioxidant Capacity of Bitter and Sweet Varieties of Ferula assa-foetida and Bunium persicum

Background: Due to low information about total antioxidant capacity of three species of plants native to Ilam province which are used in the ethnobotanical knowledge of this region, This study was drafting to evaluation the antioxidant ability of bitter and sweet varieties of Ferula assa-foetida and Bunium persicum with therapeutic potential on gynecological diseases.Methods: The methanolic extracts of two different variants of F. assa-foetida and B. persicum gum-resin were prepared and then antioxidant effects were evaluated by ferric reducing-antioxidant power assay.Results: Our results showed that methanolic extracts of B. persicum gum-resin could significantly revealed antioxidant effect in comparison to two different variants of F. assa-foetida (P<0.05). While antioxidant capacity between bitter and sweet varieties of F. assa-foetida were not statistically significant.Conclusion: Our results showed that both B. persicum and the bitter and sweet varieties of F. assa-foetida native to Ilam province, located in west of Iran, could have medicinal therapeutic effects relatively through direct oxidation prevention

TiFe2O4@SiO2–SO3H: A novel and effective catalyst for esterification reaction

In the present study, TiFe2O4@SiO2–SO3H heterogeneous catalyst was successfully synthesized and applied to generate biodiesel from oleic acid, and palmitic acid using an esterification process. In this sense, the nanocatalyst surface was characterized using TEM, TGA, XRD, FTIR, VSM, BET, SEM, and EDX analyses. Nanocatalyst TiFe2O4@SiO2–SO3H showed high activity for the esterification of oleic acid and palmitic acid. Also, the nanocatalyst can be easily recovered with a bar magnet and reused many times without any loss of activity

Computational study of the thermal performance of water/Fe3O4 nanofluid in an oscillating heat pipe: A molecular dynamics approach

Recently, oscillating heat pipes (OHPs) filled with nanofluid (NF) as the operating fluid has drawn researchers’ attention because of their improved thermal conductivity, and heat/mass transfer (HT/MT) characteristics. An OHP is an HT device based on a two-phase fluid flow that transfers heat between heat sources and heat sinks which is applicable in industries in terms of its highly effective thermal conductivity. According to previous research, in previous experimental and computational studies, the effect of adding metal oxide NPs into the operating fluid of an OHP was not studied. Therefore, adding Fe3O4 NPs to the operating fluid of the water flowing into an OHP with nano dimensions will be the research work ahead that can increase the efficiency of designed structures. The maximum density, velocity, temperature, and heat flux after 20 ns are examined to determine the effects of NP size and an external magnetic field (EMF). The numerical findings show that heat flux increased from 1561 to 1602 W/m2 when the NPs' size grew from 5 to 10. Therefore, the HT/MT of Fe3O4-H2O simulated NF showed enhanced thermal behavior as NP's radius increases. Furthermore, the results show that the presence of an EMF enhanced the thermal behavior of NF in the OHP. The heat flux increased from 1563 to 1586 W/m2 when the magnetic field magnitude increased from 1 to 5 T