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Modelling photosynthetic responses by day and night during initial water stress in Pulmonaria vallarsae.
Physiol Plant
December 2024
Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.
The relationships between photosynthesis and initial water deficit stress were investigated by chlorophyll fluorescence analysis in Pulmonaria vallarsae, a shade tolerant, perennial C3 herb by following changes of light response curves (LRCs) in single leaves during water shortage. We devised an LRC model based on two interacting rectangular hyperbolae (DH model) for the low (H1) and the high irradiance regions (H2), characterized by two parameters: maximum extrapolated ETR (V1, V2) and half-saturation irradiance (K1, K2). While H1 is assumed to represent an ETR-related function, H2 may reflect Rubisco activity.
View Article and Find Full Text PDFPedestrian automatic emergency braking responses to a stationary or crossing adult mannequin during the day and night.
Traffic Inj Prev
November 2024
Insurance Institute for Highway Safety, Ruckersville, Virginia.
Objective: Automatic emergency braking systems with pedestrian detection (PAEB) are effective at preventing pedestrian crashes, but the safety benefits are not observed at night. This study used the Insurance Institute for Highway Safety (IIHS) PAEB test data to characterize PAEB responses in different lighting conditions and for different rated systems.
Methods: Data from 6,919 IIHS PAEB tests were retrieved from IIHS databases.
First report of ergot caused by in switchgrass ( L.) in Georgia, USA.
Plant Dis
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University of Georgia, Plant Pathology, Griffin, Georgia, United States.
Switchgrass (Panicum virgatum L.) is a North American grass species with biofuel potential. Claviceps spp.
View Article and Find Full Text PDFCircadian (diurnal/nocturnal) pattern of cardiac arrhythmias.
Heart Rhythm
October 2024
Euroclinic Hospital, Athens, Greece. Electronic address:
Article Synopsis
- * The review discusses how daily rhythms affect arrhythmia events and emphasizes the need for a comprehensive approach in diagnosing and treating these issues, especially considering factors like sleep disorders and comorbidities.
- * Effective treatments for nocturnal arrhythmias may involve adjusting medication timing, addressing underlying health conditions like obesity and sleep apnea, and utilizing specialized therapies, which can reduce severe heart issues and the need for invasive procedures.
Cardiovascular adaptations and pathological changes induced by spaceflight: from cellular mechanisms to organ-level impacts.
Mil Med Res
September 2024
Beijing Key Laboratory of Preclinical Research and Evaluation for Cardiovascular Implant Materials, Animal Experimental Centre, National Centre for Cardiovascular Disease; Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100037, China.
The advancement in extraterrestrial exploration has highlighted the crucial need for studying how the human cardiovascular system adapts to space conditions. Human development occurs under the influence of gravity, shielded from space radiation by Earth's magnetic field, and within an environment characterized by 24-hour day-night cycles resulting from Earth's rotation, thus deviating from these conditions necessitates adaptive responses for survival. With upcoming manned lunar and Martian missions approaching rapidly, it is essential to understand the impact of various stressors induced by outer-space environments on cardiovascular health.
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