Diurnal cycles provide a tractable system to study the response of metabolism and growth to fluctuating temperatures. We reasoned that the response to daytime and night temperature may vary; while daytime temperature affects photosynthesis, night temperature affects use of carbon that was accumulated in the light. Three Arabidopsis thaliana accessions were grown in thermocycles under carbon-lim...

The acute thermal effects of artificial light during the daytime have potential to promote energy savings and enhance indoor comfort. Although long-held hue-heat hypothesis suggests that visual features lighting may alter human responses, there currently exists no systematic review or cross-study analysis synthesizes characterizes light's impact along both non-visual pathways daytime. This high...

Greenhouses with sophisticated environmental control systems, or so-called plant factories with solar light, enable growers to achieve high yields of produce with desirable qualities. In a greenhouse crop with high planting density, low photosynthetic photon flux density (PPFD) at the lower leaves tends to limit plant growth, especially in the winter when the solar altitude and PPFD at the cano...

Carbon dioxide (CO2) emissions to the atmosphere from running waters are estimated be four times greater than total carbon (C) flux oceans. However, these fluxes remain poorly constrained because of substantial spatial and temporal variability in dissolved CO2 concentrations. Using a global compilation high-frequency measurements, we demonstrate that nocturnal on average 27% (0.9 gC m?2 d?1) th...

Diurnal cycles provide a tractable system to study the response of metabolism and growth to fluctuating temperatures. We reasoned that the response to daytime and night temperature may vary; while daytime temperature affects photosynthesis, night temperature affects use of carbon that was accumulated in the light. Three Arabidopsis thaliana accessions were grown in thermocycles under carbon-lim...

introduction: epilepsy is a complex pervasive neurobehavioral and social condition accompanied by a wide range of comorbid conditions that can adversely affect the quality of life of patients. sleep complaints are common among patients with epilepsy. the aim of this study was to assess the prevalence of subjective sleep disturbances and its effects on sleep quality in epileptic patients.  metho...

Baehr, Erin K., Louis F. Fogg, and Charmane I. Eastman. Intermittent bright light and exercise to entrain human circadian rhythms to night work. Am. J. Physiol. 277 (Regulatory Integrative Comp. Physiol. 46): R1598–R1604, 1999.—Bright light can phase shift human circadian rhythms, and recent studies have suggested that exercise can also produce phase shifts in humans. However, few studies have ...

BACKGROUND Although heavy alcohol consumption is associated with hypertension, the impact of lighter consumption on blood pressure (BP) is controversial. The protective effect of light alcohol consumption on cardiovascular disease described in previous studies could be, in part, mediated by effects of alcohol on BP. However, only a few studies investigating the association between alcohol and B...

The increased breast cancer risk in female night shift workers has been postulated to result from the suppression of pineal melatonin production by exposure to light at night. Exposure of rats bearing rat hepatomas or human breast cancer xenografts to increasing intensities of white fluorescent light during each 12-hour dark phase (0-345 microW/cm2) resulted in a dose-dependent suppression of n...