Kinetic, Isotherm and Thermodynamic Analysis on Adsorption of Cr(VI) Ions from Aqueous Solutions by Synthesis and Characterization of Magnetic-Poly(divinylbenzene-vinylimidazole) Microbeads

The magnetic-poly(divinylbenzene-1-vinylimidazole) [m-poly(DVB-VIM)] microbeads (average diameter 53–212 μm) were synthesized and characterized; their use as adsorbent in removal of Cr(VI) ions from aqueous solutions was investigated. The m-poly(DVB-VIM) microbeads were prepared by copolymerizing of divinylbenzene (DVB) with 1-vinylimidazole (VIM). The m-poly(DVB-VIM) microbeads were characterized by N2 adsorption/desorption isotherms, ESR, elemental analysis, scanning electron microscope (SEM) and swelling studies. At fixed solid/solution ratio the various factors affecting adsorption of Cr(VI) ions from aqueous solutions such as pH, initial concentration, contact time and temperature were analyzed. Langmuir, Freundlich and Dubinin–Radushkvich isotherms were used as the model adsorption equilibrium data. Langmuir isotherm model was the most adequate. The pseudo-first-order, pseudo-second-order, Ritch-second-order and intraparticle diffusion models were used to describe the adsorption kinetics. The apparent activation energy was found to be 5.024 kJ mol−1, which is characteristic of a chemically controlled reaction. The experimental data fitted to pseudo-second-order kinetic. The study of temperature effect was quantified by calculating various thermodynamic parameters such as Gibbs free energy, enthalpy and entropy changes. The thermodynamic parameters obtained indicated the endothermic nature of adsorption of Cr(VI) ions. Morever, after the use in adsorption, the m-poly(DVB-VIM) microbeads with paramagnetic property were separeted via the applied magnetic force. The magnetic beads could be desorbed up to about 97% by treating with 1.0 M NaOH. These features make the m-poly(DVB-VIM) microbeads a potential candidate for support of Cr(VI) ions removal under magnetic field

Relationship of hematologic markers with IL-17 and IL-1 beta in patients with rheumatoid arthritis

PMID = 2957847

Central nervous system involvement in rheumatoid arthritis: possible role of chronic inflammation and tnf blocker therapy

PMID = 2928841

Comparison of blood platelet distribution width and neutrophil-lymphocyte ratio in patients with different grades of knee osteoarthritis

PMID = 3034759

Comparison of 25-hidroksi Vitamin D serum concentrations in patients with psoriasis and psoriatic arthritis

PMID = 2894651

The impact of additional trunk balance exercises on balance, functional condition and ambulation in early stroke patients: Randomized controlled trial

Objectives: This study aims to investigate the effect of additional trunk exercises to conventional exercise program on balance, functional condition and ambulation in early stage stroke patients. Patients and methods: A total of 65 patients were included in this double-blinded randomized controlled study. Patients were assigned to two groups as experimental group (n=32) who performed trunk exercises two hours/day/three weeks accompanied by conventional exercise program, and control group (n=32) who received only conventional exercise program during the three weeks. Balance, trunk balance, functional level and ambulation were assessed by Berg Balance Scale, Trunk Impairment Scale, Functional Independence Measurement, Rivermead Mobility Index, respectively. Patients were evaluated pretreatment and on the third month after the treatment. Results: There was no statistically significant difference between the outcome measurements between the groups at the pretreatment evaluation. All outcome measurements were improved significantly between pre-and post-treatment evaluation in general linear repeated measures model. The interaction parameter of “time x condition” according to time and recovery was significantly better in experimental group than in control group. The highest mean difference in efficacy between the two rehabilitation interventions was found for dynamic sitting balance in post hoc calculations. Conclusion: According to the results of our study, in early stroke patients either conventional exercises or conventional exercises plus trunk balance exercises can provide significant improvement in balance, functional condition and ambulation. However, the level of the improvement is better for the group which was applied trunk balance exercises to conventional exercises. Trunk balance exercises that are easily applicable with simple mechanisms by the patients themselves can be added to the rehabilitation. © 2016 by Turkish Society of Physical Medicine and Rehabilitation

Levels of serum pentraxin 3, IL-6, fetuin A and insulin in patients with rheumatoid arthritis

PMID = 2715270

Paediatric Behcet's disease with sinus venous thrombosis: experience from three centres in Turkey

Objective. To report our experiences of the juvenile Behcet's disease (BD) patients with cerebral venous sinus thrombosis (CVST) and to review previous studies reporting the clinical characteristics and outcomes of juvenile BD with CVST