Photosynthetic starch reserves that accumulate in Arabidopsis leaves during the day decrease approximately linearly with time at night to support metabolism and growth. We find that the rate of decrease is adjusted to accommodate variation in the time of onset of darkness and starch content, such that reserves last almost precisely until dawn. Generation of these dynamics therefore requires an ...

1. Mucociliary clearance has been measured over a 6 h period by using the radioaerosol technique in seven normal male subjects lying supine, both during the day when awake, and during the night when asleep. 2. The percentage of radioaerosol cleared during the night, when asleep, was significantly less than during the day when awake (P less than 0.02). 3. A comparison of radioaerosol clearance b...

This article describes a simple model obtained from a commercial Stirling engine and used for heating a caravan. The Stirling engine has been tested in the lab under different electrical load conditions, and the operating points obtained are presented. As an application of the model, a series of transient simulations was performed using TRNSYS. During these simulations, the caravan is traveling...

Principal component analysis is applied to analyze the horizontal component of geomagnetic data for the Panzhihua Ms 6.1 earthquake. We investigate temporal variations in eigenvalues and find that only the first principal component has good correlation with the Ap index for which the cross-correlation correlation R is larger than 0.6, which may imply solar–terrestrial activity. Both the second ...

A study carried out on the occurrence of post midnight spread-F events at a low-latitude station, Waltair (17.7 N, 83.3 E), India revealed that its occurrence is maximum in the summer solstice months of the low solar activity period and decreases with an increase in the sunspot activity. The F-region virtual height variations show that 80% of these spread-F cases are associated with an increase...

Intraspecific variation in vertical distribution, timing of vertical migration, and colouration of the mesopelagic shrimp Sergestes arcticus were studied in the >400 m deep part of Masfjorden, Norway. Very few individuals were caught in the upper strata during daytime, and larger individuals occurred deeper during the day than smaller ones. Vertical migration was prominent and no overall trend ...

Lack of quality sleep is a major concern in severely ill patients admitted to intensive care units (ICU) across the world. They are regularly under influence of sedatives to tolerate invasive ventilation. These patients experience altered sleep circadian rhythm, minimal sleep in restorative phase, marked by frequent disruptions caused by nursing and medical interventions and ambient noise durin...

Australian Research Council Centre of Excellence in Plant Energy Biology, University of Western 12 Australia, Perth Australia 6009 13 Australian Research Council Centre of Excellence in Plant Energy Biology, The Australian National, 14 Canberra, Australia 0200 15 16 One Sentence Summary: 17 Mature Arabidopsis leaves display substantial variation in night-time respiration rates that is 18 metabo...

The temporal and spatial variation of the upper transition height ( H T ) is studied using measurements Incoherent Scatter Radar (ISR) at Arecibo Observatory 18.35 ° N , 66.75 W Puerto Rico (magnetic latitude 30 ). Observed ion compositions, electron densities, temperatures are analysed to understand diurnal seasonal variations low high solar activity covering cycles 23 24. results show that du...