Dielectric Characteristics, Electrical Conductivity and Solvation of Ions in Electrolyte Solutions.

Solvation and association of ions in solutions largely depend on the dielectric properties of the solvent, the distance between ions in solutions, and temperature. This paper considers the effect of temperature on static dielectric constant (DC), dipole dielectric relaxation (DR) time, and limiting (ultimate) high frequency (HF) electrical conductivity (EC) of water and some polar solvents. In the investigated temperature range (0-370 °C), the static DC and DR time of water decrease, and limiting HF EC passes through a maximum at 250-300 °C with temperature growth.

[CADASIL syndrome: differential diagnosis with multiple sclerosis].

Two cases of clinical and MRI manifestations of genetically verified CADASIL syndrome in female patients under 40 years of age are presented. The primary misinterpretation of clinical data and the neuroimaging results within multiple sclerosis indicates a lack of awareness of radiologists and neurologists about this disease. The article reviewed the current literature on the problems of diagnosis and treatment of CADASIL.

Ataxia with Oculomotor Apraxia Type 4 with Common "Portuguese" and Novel Mutations in Two Belarusian Families.

Ataxia with oculomotor apraxia type 4 (AOA4) is a rare autosomal recessive, -related disorder delineated in 2015 in Portugal. We diagnosed AOA4 by next generation sequencing (NGS) followed by Sanger's sequencing in three boys from two unrelated Belarusian families. In both families, one of the heterozygous mutations was c.

[New allelic variants of non-syndromic mental retardation of type 20 caused by mutations in the MEF2C gene].

Aim: To determine clinical and genetic characteristics of patients with non-syndromic mental retardation (NMR), type 20 with autosomal dominant type of inheritance (OMIM: 613443).

Material And Methods: Fourteen patients were studied including four patients with mutations in the MEF2C gene revealed by exome sequencing. Three of the four mutations in the gene were found for the first time.