Dynamic Pulse Reaction – Update 2020

The Nogier reflex or reflex auriculo-cardiac (RAC) or the dynamic pulse reaction is a physiological phenomenon that is not generally accepted in conventional medicine. Therefore, evidence-based research in this sub-area is important for auricular medicine as it provides appropriate scientific evidence for better acceptance. In this editorial, a RAC measurement based on a modified smartphone registration and analysis is presented. The contribution is intended to stimulate researchers to continue working in this interesting area.

Female students pulse response on individual steps of step-aerobics

Health training based on aerobic exercise continues to occupy a leading position in modern fitness. Among them, aerobics on step-platforms occupies a special place. It is proved po- sitive influence of step aerobics on the cardiovascular system, respiratory system, musculoskeletal system, etc. It is important when doing any kind of aerobics to watch over students. The value of heart rate is one of the most objective indicators of the body’s response to stress. The problems of load management during the step aerobics classes both by the instructor and by the students themselves remain relevant. We detected pulse response of students in the individual steps of step aerobics performed on the steppes of in different heights and with different amplitudes of hand movements. Low heart rate was observed when performing steps on a low degree without hand movements (with the exception of Mambo), the highest rates – on a high degree with hand movements of large amplitude. The greatest increase in heart rate is observed when performing steps Chasse, Cha-cha-cha, Lift side, the smallest – V-step, Mambo, Basic step. However, the performance of all the selected steps on the lower step with the movements of the hands of the average amplitude gave a larger increase of the pulse response than if these steps are performed on a high degree without the hand movements. It is proved that a greater increase in heart rate leads to the addition of hand choreography of different amplitudes than the increase in the height of the step. In this regard, it can be noted that many instructors do not deservedly pay little attention to the choreography of hand movements, adjusting the intensity only with the help of changing the height of the step. Knowledge of the pulse reaction of those engaged in various steps of step aerobics will allow the instructor to plan and adjust the load more accurately in the classroom.

Active site densities, oxygen activation and adsorbed reactive oxygen in alcohol activation on npAu catalysts

The activation of molecular O2 as well as the reactivity of adsorbed oxygen species is of central importance in aerobic selective oxidation chemistry on Au-based catalysts. Herein, we address the issue of O2 activation on unsupported nanoporous gold (npAu) catalysts by applying a transient pressure technique, a temporal analysis of products (TAP) reactor, to measure the saturation coverage of atomic oxygen, its collisional dissociation probability, the activation barrier for O2 dissociation, and the facility with which adsorbed O species activate methanol, the initial step in the catalytic cycle of esterification. The results from these experiments indicate that molecular O2 dissociation is associated with surface silver, that the density of reactive sites is quite low, that adsorbed oxygen atoms do not spill over from the sites of activation onto the surrounding surface, and that methanol reacts quite facilely with the adsorbed oxygen atoms. In addition, the O species from O2 dissociation exhibits reactivity for the selective oxidation of methanol but not for CO. The TAP experiments also revealed that the surface of the npAu catalyst is saturated with adsorbed O under steady state reaction conditions, at least for the pulse reaction.