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Theoretical models of retinal hemodynamics showed the modulation of retinal pulsatile patterns (RPPs) by heart rate (HR), yet in-vivo validation and scientific merit of this biological process is lacking. Such evidence is critical for result interpretation, study design, and (patho-)physiological modeling of human biology spanning applications in various medical specialties. In retinal hemodynamic video-recordings, we characterize the morphology of RPPs and assess the impact of modulation by HR or other variables. Principal component analysis isolated two RPPs, i.e., spontaneous venous pulsation (SVP) and optic cup pulsation (OCP). Heart rate modulated SVP and OCP morphology (pFDR < 0.05); age modulated SVP morphology (pFDR < 0.05). In addition, age and HR demonstrated the effect on between-group differences. This knowledge greatly affects future study designs, analyses of between-group differences in RPPs, and biophysical models investigating relationships between RPPs, intracranial, intraocular pressures, and cardiovascular physiology. Video-recordings of retinal pulsatile patterns in human eye are modulated by heart rate and age. This invivo evidence fundamentally impacts modeling of retinal function and clinical design in wide range of medical specialties. [ABSTRACT FROM AUTHOR]

Discusses the biogeochemical lines of evidence pointing to vegetation as the primary source of methyl bromide and methyl chloride emissions from salt marshes. Soil inundation; Relation of methyl chloride and methyl bromide fluxes with overall plant biomass; Diurnal variabilities of fluxes that correspond with variations in air, temperature, sunlight and carbon dioxide emissions.

Investigates the role of the coastal salt marshes in the atmospheric concentration of natural methyl bromide and methyl chloride emissions. Fluxes of methyl chloride and methyl bromide per unit area; Diurnal, seasonal and spatial variabilities of fluxes; Correlation between the fluxes of methyl chloride and methyl bromide; Molar flux ratio.