Timing the opening and closure of the aortic valve using a phonocardiogram envelope: a performance test for systolic time intervals measurement.
Sign Up to like & getrecommendations! Published in 2021 at "Physiological measurement"
DOI: 10.1088/1361-6579/abe0fe
Abstract: OBJECTIVE This work explored the reliability of using points on the heart sounds envelope as indicators of the opening and closure of the aortic valve (AVO, AVC) to measure the pre-ejection period (PEP) and the… read more here.
Keywords: envelope; aortic valve; opening closure; pep ... See more keywords
Light-Mediated Signaling and Metabolic Changes Coordinate Stomatal Opening and Closure
Sign Up to like & getrecommendations! Published in 2020 at "Frontiers in Plant Science"
DOI: 10.3389/fpls.2020.601478
Abstract: Stomata are valves on the leaf surface controlling carbon dioxide (CO2) influx for photosynthesis and water loss by transpiration. Thus, plants have to evolve elaborate mechanisms controlling stomatal aperture to allow efficient photosynthesis while avoid… read more here.
Keywords: light; stomatal opening; opening closure; water loss ... See more keywords