Microreactor designed for efficient plasma-liquid segmented flows.

Microreactors were designed for gas-liquid plasma chemical processes and operated under segmented flows in a high aspect ratio (8.76) rectangular microchannel. First, the hydrodynamics of the gas-liquid flows generated at a T-junction was investigated for fifteen solvents commonly used in organic synthesis.

[From hero to deserter, figures of the caregiver at the time of COVID-19].

In the context of the COVID-19 pandemic, psychologists from various departments of a hospital centre in the Paris region intervened with the establishment's nursing and non-nursing staff. They gathered testimonies related to the experience of the first wave of this health crisis. They offer their interpretation of the event, which highlights the climate of uncertainty that reigned, both in its health and political dimensions.

Does a not-so-recent ankle sprain influence interjoint coordination during walking?

Background: Ankle sprains are common joint injuries in daily and sports activities, whose underlying mechanisms have been amply studied. If joint structures are directly damaged, neuromuscular activity can be affected, particularly in the time domain. This study aims to establish whether previous ankle injury correlates with changes in the inter-joint synergy of the entire lower limb and in the muscle activity pattern during walking.

Effects of foot orthoses on the temporal pattern of muscular activity during walking.

Background: Several studies have described the biomechanical effects of foot orthotics, as well as their effects at the level of muscular recruitment. Although the latter effect is unlikely to be limited to muscular intensity, the temporal pattern of activity of the muscles involved in walking with orthoses is still unclear.

Methods: Twelve adults with everted static rearfoot posture higher than 5° of valgus participated in the study.

Effects of gait pattern and arm swing on intergirdle coordination.

Mature locomotion in humans is characterized by an anti-phase coordination (moving in opposite directions) between the pelvic and the scapular girdles. This pattern involves a specific relationship between the arm and leg motion is deemed to be most flexible and dynamically efficient. Still, when the arms are involved in another task, like a field player running with a ball in the hands, locomotion is still possible.