Three-dimensional (3D) numerical simulation of natural convection of an electrically conducting fluid under the influence of a magnetic field in an inclined cylindrical annulus has been performed. The inner and outer cylinders are maintained at uniform temperatures and other walls are thermally insulated. The governing equations of this fluid system are solved by a finite volume (FV) code based on SIMPLER solution scheme. Detailed numerical results of heat transfer rate, Lorentz force, temperature and electric fields have been presented for a wide range of Hartmann number (0 ≤ Ha ≤ 60) and inclination angle (0 ≤ γ ≤ 90). The results indicate that a magnetic field can control the magnetic convection of an electrically conducting fluid. Depending on the direction and strength of the magnetic field, the suppression of convective motion was observed. For vertical cylindrical annulus, increasing the strength of the magnetic field causes the loss symmetry, and as the consequence, isotherms lose their circular shape. With increasing the Hartmann number the average Nusselt number approaches a constant value. For vertical annulus, the effect of Hartmann number on the average Nusselt number is not prominent compared to the case of horizontal annulus.

This finding suggested that KEAf can be a suitable candidate as a cosmetic product to improve aging-related skin abnormalities and regeneration of aged skin.

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H IGH antimicrobial and antioxidant effects of garlic make it possible to use as an effective topical cream to heal burn wound injuries. The present research was done to evaluate the burn wound healing effects of the aqueous extract of garlic on rat model. Aqueous extract was achieved from fresh garlic. Thirty healthy adult rats were subjected to burn wounding and then randomly treated with silver sulfadiazine (positive control), cream base (negative control) and garlic topical cream (0.8%, 0.4% and 0.2%). Rats were then maintained for 21 days and macroscopic and microscopic examinations were performed through the experiment. Burn wound contraction was increased in all groups of rats during the experiment period. The highest percent of burn wound contraction at day 21 was found in rats treated with 0.4% garlic topical cream (88.10%), while those treated with cream base had the lowest wound contraction (70.30%). Rats treated with 0.4% garlic topical cream showed more rapid granulation, formation of scar and healingin the macroscopic examination. Additionally, rats treated with 0.4% garlic topical cream had the higher amounts of tissue granulation with dense collagen deposition in the microscopic examination after 21 days of wounding. Burn wound healing effects of the garlic extract was not dose depended. It seems that application of 4% garlic cream is an effective way to improve the burn wound healing of rats. However, supplementary studies are needed to evaluate other effects of garlic cream on burn wound.

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