The use of professional oral hygiene in orthodontic treatment on the results of studies of gingival fluid biomarkers

The aim: to prove the necessity of professional oral hygiene before the fixation of permanent orthodontic equipment in individuals with dental and facial anomalies based on the study of biomarkers of gingival fluid. Materials and Methods: Clinical, cytological examination and gingival fluid test on cytokine levels in 80 patients. Results: In patients with dentofacial anomalies observed decline in hygiene index, and increase the content of gingival fluid neutrophils and degenerative epithelial cells. It is accompanied by an increase in the concentration of the main group of pro-inflammatory and osteogenic cytokines, growth factors. Conclusion: Preliminary conducting professional oral hygiene to orthodontic treatment in patients with dentofacial anomalies leads to the conservation values of satisfactory hygienic indices of the mouth. In this case, the increase in the content of gingival fluid neutrophils and degenerative epithelial cells, with increased concentrations of the main group of pro-inflammatory and osteogenic cytokines has been defined insignificant

Terahertz luminescence in strained GaAsN:Be layers under strong electric fields

The authors report on the experimental studies of terahertz emission from strained GaAsN/GaAs microstructures doped with beryllium at the conditions of electric breakdown of the shallow impurity. The terahertz emission spectrum demonstrates several distinctive signatures that are related to spontaneous optical transitions between resonant and localized states of the acceptor. The energy spectrum calculated for the Be acceptor in the GaAsN/GaAs heterostructure fits reasonably well with the experimentally observed peaks

New installation for inclined EAS investigations

The large-scale coordinate-tracking detector TREK for registration of inclined EAS is being developed in MEPhI. The detector is based on multiwire drift chambers from the neutrino experiment at the IHEP U-70 accelerator. Their key advantages are a large effective area (1.85 m2), a good coordinate and angular resolution with a small number of measuring channels. The detector will be operated as part of the experimental complex NEVOD, in particular, jointly with a Cherenkov water detector (CWD) with a volume of 2000 cubic meters and the coordinate detector DECOR. The first part of the detector named Coordinate-Tracking Unit based on the Drift Chambers (CTUDC), representing two coordinate planes of 8 drift chambers in each, has been developed and mounted on opposite sides of the CWD. It has the same principle of joint operation with the NEVOD-DECOR triggering system and the same drift chambers alignment, so the main features of the TREK detector will be examined. Results of the CTUDC development and a joint operation with NEVOD-DECOR complex are presented

New installation for inclined EAS investigations

The large-scale coordinate-tracking detector TREK for registration of inclined EAS is being developed in MEPhI. The detector is based on multiwire drift chambers from the neutrino experiment at the IHEP U-70 accelerator. Their key advantages are a large effective area (1.85 m2), a good coordinate and angular resolution with a small number of measuring channels. The detector will be operated as part of the experimental complex NEVOD, in particular, jointly with a Cherenkov water detector (CWD) with a volume of 2000 cubic meters and the coordinate detector DECOR. The first part of the detector named Coordinate-Tracking Unit based on the Drift Chambers (CTUDC), representing two coordinate planes of 8 drift chambers in each, has been developed and mounted on opposite sides of the CWD. It has the same principle of joint operation with the NEVOD-DECOR triggering system and the same drift chambers alignment, so the main features of the TREK detector will be examined. Results of the CTUDC development and a joint operation with NEVOD-DECOR complex are presented