Publications by authors named "A V Berseneva"
The synthesis of five quaternary hexagonal tungsten bronze (HTB) fluorides, MMF, ( = Cs and Rb; M = Co, Ni, and Zn; and = V) via a mild hydrothermal route is reported. The crystal structures and compositions were determined using a combination of single-crystal X-ray diffraction, Rietveld refinement of powder X-ray diffraction data, and inductively coupled plasma optical emission spectroscopy analysis. This study highlights the sensitivity of the mild hydrothermal method on the reaction temperature, solvent system, and quantity of starting reagents that directly influence the selective synthesis of kinetically stabilized fluoride materials, including hydrated fluorides, β-pyrochlores, and HTB.
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- A detailed structural analysis of 11 new quaternary rare earth thiosilicates, known as AkRESiS (with Ak representing Ca and Sr and RE being various rare earth elements), was conducted using a specific synthesis method.
- The materials all crystallize in a trigonal system and their structures were identified through single crystal X-ray diffraction.
- Physical property tests showed that certain compositions exhibited magnetic properties, significant optical band gaps, and notable green luminescence when exposed to UV light, alongside scintillation effects under X-ray radiation.
Neurofibromatosis type 2 (NF2) is a rare autosomal dominant disease (frequency 1 in 25-90 000) characterized by the formation of tumors of the central nervous system due to a mutation in the gene on chromosome 22q12. Bilateral vestibular schwannomas are recognized as absolute diagnostic criteria of NF2 and occur in 95% of patients, are accompanied by hearing impairment, manifest at the age of 18-24 years. Skin manifestations can precede vestibular schwannomas for several years and predict the course of the disease: neurofibromas, cafe-au-lait macules, hypopigmented spots, recently described mesh capillary malformations.
View Article and Find Full Text PDFGeometric magnetic frustration arises when the geometry of a structure prevents the simultaneous fulfillment of nearest-neighbor antiferromagnetic interactions and is commonly observed in lattices that exhibit a triangular topology, such as those found in the pyrochlore structure. a mild hydrothermal route, we have synthesized seven quaternary β-pyrochlore-related fluorides AMMF (A = Cs and Rb; M = Co, Ni, and Zn; and M = V and Fe). Crystal structures and compositions were determined using a combination of single-crystal X-ray diffraction and energy-dispersive spectroscopy.
View Article and Find Full Text PDFBackground: Overweight is the scourge of modern society and a major risk factor for many diseases. For this reason, understanding the genetic component predisposing to high body mass index (BMI) seems to be an important task along with preventive measures aimed at improving eating behavior and increasing physical activity.
Methods: We analyzed genetic data of a European cohort (n = 21,080, 47.