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“Eosinophilic fasciitis is a rare disease, but it must be considered in patients with adult myalgia. Here, we report the case of 32-year-old man who presented with a 4-month history of bilateral myalgia of the lower limbs, which subsequently spread to the upper limbs. There was no specific medical history, no trauma, and no intense activity. Physical examination revealed induration of the skin with irreducible flexion of the fingers as observed in scleroderma. Laboratory examination showed
peripheral eosinophilia associated with moderate elevation of both the erythrocyte IWR-1-endo chemical structure sedimentation rate and C-reactive protein. No infectious, neoplastic, hemopathic, or immunological abnormality was detected. Magnetic resonance imaging (MRI) showed thickening of the muscular fascias of the thigh in high signal intensity on T2-weighted images, slightly enhanced after contrast agent injection on T1 images, without myositis. MRI-guided muscle biopsy demonstrated fascia infiltration characterized by mononuclear
inflammatory cells and polynuclear eosinophils. A diagnosis of eosinophilic fasciitis was confirmed and the patient this website received prednisolone. One month later, he reported improvements in general health, pain, motion, joint mobility, and skin induration associated with normalization of both hypereosinophilia and biologic inflammation. After 12 months, clinical MRI and laboratory parameters were normal and the patient was considered to be in clinical remission.”
“Diacetyl hexamethylene-diamine (MHAD) and diacetyl m-phenylenediamine (Mm-PDA) were synthesized by acetylating hexamethyene-diamin (HAD) and m-phenylenediamine (m-PDA) with glacial acetic acid in presence of phosphoric acid, in order to retard the high check details reactivity of polyurea.
Chemical structures of modified diamine chain extenders were confirmed through FTIR, the determination of the nitrogen content, High resolution ESI-Fourier transform ion cyclotron resonance (ESI-FTICR) mass spectrometry and (1)H-NMR analysis. Polyureas were synthesized via two-step solution process by reaction of 4,4′-diphenyl diisocyanate (MDI), amine terminated polyether (Jeffamine D-2000) with different chain extenders. The influence of modified diamine chain extenders on gel time of polyurea was investigated. The gel time was prolonged from 11s to 52s and 13s to 65s respectively. The reaction kinetics of synthesizing polyureas were studied by FTIR. The results showed that extending reaction with MHAD was second order kinetic mechanism, its apparent activation energy was 43.99 kJ.mol(-1); extending reaction with Mm-PDA reaction was first order, its activation energy was 58.95 kJ.mol(-1). (C) 2011 Wiley Periodicals, Inc.