Synthesis of Aromatic Polyimides Based on 3,4'-Oxydianiline by One-Pot Polycondensation in Molten Benzoic Acid and Their Application as Membrane Materials for Pervaporation.

A series of aromatic polyimides based on the asymmetrical diamine 3,4'-oxydianiline and various tetracarboxylic acid dianhydrides, both "rigid" and "flexible" structure, have been synthesized using the original method of one-pot high-temperature catalytic polycondensation in molten benzoic acid. The synthesized polyimides were investigated using fourier-transform infrared (FTIR) and H NMR spectroscopy, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), thermomechanical analysis (TMA) and wide-angle X-ray scattering (WAXS). It was found that the synthesized polyimides, depending on the used dianhydride, are characterized by different solubility in organic solvent and molten benzoic acid, molecular weight, glass transition temperature (Tg) from 198 to 270 °C, an amorphous or semi crystalline structure with the degree of crystallinity from 41 to 52%.

[Psychometric validation of the Russian version of the Central Sensitization Inventory in adolescents (14-17 years old)].

Objective: To validate a Russian version of the Central Sensitization Inventory (CSI) in adolescents (14-17 years old).

Material And Methods: The study included adolescents aged 14-17 years. Group 1 (=69) - frequent episodic and chronic tension type headache; group 2 (=63) - chronic myogenic neck pain; group 3 (=61) - infrequent episodic tension type headache; group 4 (=67) - adolescents without pain during the last 6 months.

[Central Sensitization Inventory - a Russian version].

Objective: To develop and validate a Russian version of The Central Sensitization Inventory (CSI-R).

Material And Methods: The study included 3 stages: 1) direct and reverse translation, linguistic validation of the questionnaire; 2) assessment of internal consistency, reliability and sensitivity (=50); 3) psychometric validation in the samples of patients with fibromyalgia syndrome (=40), chronic widespread pain (=40), regional chronic low back pain without other specific pain complaints (=40), and in the control sample of informants with no pain complaints (=40).

Results And Conclusion: The Russian version of CSI-R is valid, reliable and can be used in clinical practice as a diagnostic tool for revealing central sensitization.

[Upper crossed syndrome of muscle imbalance in adolescents with tension-type headache].

Aim: To assess the efficacy of elastic kinesiotaping in the treatment of upper crossed syndrome of muscle imbalance (UCSMI) in adolescents with tension type headache (TTH).

Material And Methods: The authors examined 65 adolescents, aged 14-17 years, with TTH with trigger zones of the pericranial muscles (myogenic trigger zones - MTZ). UCSMI was identified in all patients.