Бойові Отруйні Речовини Газові: проблемні аспекти реагування мікрогеморегуляторної системи шкіри (Частина 2)

The subject of research – microhemoregulatory system of the skin. The purpose of the work is to clearly group the structural components of the microhemocirculatory system of the skin for use in independent extracurricular activities of students, interns, cadets on this topic. In the form of questions and answers, the structural components of the microhemoregulatory system of the skin are grouped together, the problematic aspects of this topic are considered.Key words: microhemoregulatory system of skin.Предмет дослідження – мікрогеморегуляторна система шкіри. Мета роботи – чітко згрупувати структурні компоненти мікрогемоциркуляторної системи шкіри для використання при самостійній позааудиторній роботі студентів, інтернів, лікарів-курсантів з цієї теми. У формі запитань та відповідей приводяться згруповано структурні компоненти мікрогеморегуляторної системи шкіри, розглянуті проблемні аспекти цієї теми.Ключові слова: мікрогеморегуляторна система шкіри

Magnetic field measurements and wind-line variability of OB-type stars

Context. The first magnetic fields in O- and B-type stars that do not belong to the Bp-star class, have been discovered. The cyclic UV wind-line variability, which has been observed in a significant fraction of early-type stars, is likely to be related to such magnetic fields. Aims. We attempt to improve our understanding of massive-star magnetic fields, and observe twenty-five carefully-selected, OB-type stars. Methods. Of these stars we obtain 136 magnetic field strength measurements. We present the UV wind-line variability of all selected targets and summarise spectropolarimetric observations acquired using the MUSICOS spectropolarimeter, mounted at the TBL, Pic du Midi, between December 1998 and November 2004. From the average Stokes I and V line profiles, derived using the LSD method, we measure the magnetic field strengths, radial velocities, and first moment of the line profiles. Results. No significant magnetic field is detected in any OB-type star that we observed. Typical 1{\sigma} errors are between 15 and 200 G. A possible magnetic-field detection for the O9V star 10 Lac remains uncertain, because the field measurements depend critically on the fringe- effect correction in the Stokes V spectra. We find excess emission in UV-wind lines, centred about the rest wavelength, to be a new indirect indicator of the presence of a magnetic field in early B-type stars. The most promising candidates to host magnetic fields are the B-type stars {\delta} Cet and 6 Cep, and a number of O stars. Conclusions. Although some O and B stars have strong dipolar field, which cause periodic variability in the UV wind-lines, such strong fields are not widespread. If the variability observed in the UV wind-lines of OB stars is generally caused by surface magnetic fields, these fields are either weak (<~few hundred G) or localised.Comment: A&A publishe