Histopathological autopsy findings in lungs of pregnant and postpartum women who died of COVID-19 infections.

Background: The coronavirus disease 2019 outbreak (COVID-19) caused by the SARS-CoV coronavirus, has been declared as a pandemic by the World Health Organization on 11 March 2020, as a result of which about 315,000,000 people all over the world have been infected and more than 5,000,000 died.

Objective: Many scientific articles have been published concerning histopathological changes in different organs, but data concerning the lung changes of pregnant and postpartum period women who died of COVID-19 infections are still scarce. The aim of our study was to review and summarize autopsy findings and histopathological changes in lungs of pregnant and postpartum period women who died of COVID-19 infections in Armenia during 2020-2021.

Wide range linear magnetometer based on a sub-microsized K vapor cell.

atoms have the smallest ground state () hyperfine splitting of all the most naturally abundant alkali isotopes and, consequently, the smallest characteristic magnetic field value =/≈170, where is the ground state's magnetic dipole interaction constant. In the hyperfine Paschen-Back regime (≫, where is the magnitude of the external magnetic field applied on the atoms), only eight Zeeman transitions are visible in the absorption spectrum of the line of , while the probabilities of the remaining 16 Zeeman transitions tend to zero. In the case of , this behavior is reached already at relatively low magnetic field >.

Photoionization cross sections of ultracold Sr in P and S states at 390 nm and the resulting blue-detuned magic wavelength optical lattice clock constraints.

We present the measurements of the photoionization cross sections of the excited P and S states of ultracold Sr atoms at 389.889 nm wavelength, which is the magic wavelength of the S-P clock transition. The photoionization cross section of the P state is determined from the measured ionization rates of Sr in the magneto-optical trap in the P state to be 2.

Dark resonance formation with magnetically induced transitions: extension of spectral range and giant circular dichroism.

Dark resonances were formed via electromagnetically induced transparency for the first time, to the best of our knowledge, involving magnetically induced ΔF=±2 atomic transitions of alkali metal atoms, which are forbidden at zero magnetic field. The probability of these transitions undergoes rapid growth when 300-3000 G magnetic field is applied, allowing formation of dark resonances, widely tunable in the GHz range. It is established that for ΔF=+2 (ΔF=-2) transition, the coupling laser tuned to ΔF=+1 (ΔF=-1) transition of the hyperfine Λ-system must be σ (σ) polarized, manifesting anomalous circular dichroism.

[Craniofacial tumors blood supply].

Unlabelled: Because of the spread to different anatomical regions, craniofacial tumors (CFTs) usually receive blood supply from several arterial systems, and CFT removal is often accompanied by abundant blood loss.

Purpose: The study purpose was to develop an algorithm of diagnostic angiography for planning surgical treatment of CFT patients.

Material And Methods: Complex preoperative angiography was performed in 72 patients with craniofacial tumors, aged 10 to 78 years (mean age, 45.