An engineering approach to design of dextran microgels size fabricated by water/oil emulsification.

A correlation, based on fluid mechanics, has been investigated for the mean particle diameter of crosslinked dextran microgels (CDMs) prepared via a water/oil emulsification methodology conducted in a single-stirred vessel. To this end, non-dimensional correlations were developed to predict the mean particle size of CDMs as a function of Weber number, Reynolds number and viscosity number similar to ones introduced for liquid-liquid dispersions. Moreover, a Rosin-Rammler distribution function has been successfully applied to the microgel particle size distributions. The correlations were validated using experimentally obtained mean particle sizes for CDMs prepared at different stirring conditions. The validated correlation is especially applicable to medical and pharmaceutical applications where strict control on the mean particle size and size distribution of CDMs are extremely essential. [Formula: see text].

Antidepressant effects of citalopram on treatment of alopecia areata in patients with major depressive disorder.

OBJECTIVE: The authors sought to determine whether antidepressant therapy could enhance the efficacy of dermatological treatment in alopecia areata patients who suffer from major depressive disorder. METHODS: Sixty patients were enrolled in the study. Thirty patients with alopecia who were diagnosed with major depressive disorder received 20 mg/day citalopram and 5 mg/mL triamcinolone injection every 4 weeks, up to six injections, and 30 patients received only triamcinolone injection each month for 6 months using a simple random method. RESULTS: The mean diameter of the alopecic patches in the triamcinolone injection only group as against the combined treatment group (psychiatric [citalopram] plus dermatologic treatment) before treatment was 2.7 ± 0.7 (mean ± SD) and 2.5 ± 1.8, respectively, with no statistically significant differences (Mann-Whitney, p = 0.08). After 6 months of therapy, the mean diameter of patches reached 1.6 ± 1 and 0.54 ± 0.97 in the triamcinolone injection only group and the combined treatment groups, respectively (Mann-Whitney, p < 0.0001). DISCUSSION: The results of this study showed that antidepressant treatment might help in improving alopecia areata in patients with major depressive disorder.