PURPOSE To investigate the in vitro dehydration process of conventional hydrogel and silicone-hydrogel contact lens materials. METHODS Eight conventional hydrogel and five silicone-hydrogel contact lenses were dehydrated under controlled environmental conditions on an analytical balance. Data were taken at 1-min intervals and dehydration curves of cumulative dehydration (CD), valid dehydratio...

CONTEXT The ability to assess the degree of dehydration quickly and accurately in infants and young children often determines patient treatment and disposition. OBJECTIVE To systematically review the precision and accuracy of symptoms, signs, and basic laboratory tests for evaluating dehydration in infants and children. DATA SOURCES We identified 1561 potential articles by multiple search s...

Crystal dehydration is a post-crystallization technique that can potentially improve the diffraction of macromolecular crystals. There are currently several ways of undertaking this process; however, dehydration experiments are often limited in their throughput and require prior manipulation of the samples. In the present study, a novel method is proposed that uses in situ plate screening to as...

Abstract Wearable flexible electronics that are derived from hydrogels inevitably undergo dehydration, and the sensing performance is highly affected because stretchability conductivity weaken. Monitoring water retention rate of as they operate without dismantling assembled device vital for evaluating performances intervening in a timely manner to address problem. However, relevant research sti...

seedling characteristics of different sunflower (helianthus annus l.) cultivars under drought stress and inoculation with the azospirillum lipoferum in a spilt-factorial layout based on randomized complete block design with three replications were evaluated. treatments included dehydration stress (seed produced on maternal plants which irrigated after 60 (desirable irrigation), 120 (medium stre...

purpose the aim of this study was to assess the effects of ramadan fasting on several biochemical and anthropometric parameters in physically active men by comparing fasters and nonfasters before, during, and after ramadan. methods eighteen physically active men (10 fasters and 8 nonfasters) participated in this study. subjects visited the laboratory for a total of four sessions on the followin...

purpose to evaluate the effect of ramadan fasting on body water status markers of rugby players at basal condition and following a simulation of rugby sevens match. methods twelve recreational rugby sevens players played three matches: one day before ramadan (before ramadan), at the end of the first week of ramadan (beg-r) and at the end of ramadan (end-r). before and immediately after each mat...

the effects of operating parameters such as feed temperature and permeate-side pressure on the performance of a commercial pva membrane in the dehydration of toluene by a pervaporation (pv) membrane system is studied in the present work. the results obtained indicate that increasing temperature in the range of 40 to 70 °c and reducing permeate pressure in the range of 1 to 10 mmhg increase memb...

In this paper the kinetics of osmotic dehydration of carrot and the influence of this pretreatment on the post-drying processes and the quality of obtained products are analysed. Osmotic dehydration was carried out in the aqueous fructose solution in two different ways: with and without ultrasound assistance. In the first part of the research, the kinetics of osmotic dehydration was analysed on...

The effects of physiological elevations in arginine vasopressin on the cardiovascular system were studied in a group of nine conscious, chronically instrumented dogs. The animals were studied under normal conditions (plasma vasopressin, 4.1 +/- 0.4 pg/ml), after 24 hours of dehydration (plasma vasopressin, 7.3 +/- 1.5 pg/ml), after a 30-minute vasopressin infusion at 2.6 ng/kg/min (plasma vasop...