The influence of ambient cure chemistry and stoichiometry on epoxy coating surfaces.

The surface properties of epoxy resin coatings influence their function as substrates for subsequent coats. Variation in ambient cure conditions (temperature and relative humidity, RH), stoichiometry (ratio of epoxy: amine) and delay time between epoxy component mixing and film casting ("induction time") significantly altered the surface properties of ambient cured epoxy resin coatings (Dow Epoxy Novolac D.E.

Feasibility and parental perception of home sleep studies during COVID-19: a tertiary sleep centre experience.

Objective: Rapid implementation of home sleep studies during the first UK COVID-19 'lockdown'-completion rates, family feedback and factors that predict success.

Design: We included all patients who had a sleep study conducted at home instead of as inpatient from 30 March 2020 to 30 June 2020. Studies with less than 4 hours of data for analysis were defined 'unsuccessful'.

Measurement and prediction of mass transfer coefficients for syngas constituents in a hollow fiber reactor.

Syngas fermentation for producing biofuels and other products suffers from mass transfer limitations due to low CO and H solubility in liquid medium. Therefore, it is critical to characterize mass transfer rates of these gases to guide bioreactor design and optimization. This work presents a novel technique to measure the volumetric mass transfer coefficients (ka) for H and CO using gas chromatography in a non-porous hollow fiber reactor (HFR).

The Effects of Sleep on Emotional Target Detection Performance: A Novel iPad-Based Pediatric Game.

Consolidation of learning occurs during sleep but when it is disturbed there may be an adverse impact upon these functions. While research has focused upon how sleep affects cognition in adulthood, the effects of disrupted sleep are likely to impact more heavily on learning among children and adolescents. We aimed to investigate whether a night's sleep impacts upon executive function compared with an equivalent wakefulness period.

Why "improved" water sources are not always safe.

Existing and proposed metrics for household drinking-water services are intended to measure the availability, safety and accessibility of water sources. However, these attributes can be highly variable over time and space and this variation complicates the task of creating and implementing simple and scalable metrics. In this paper, we highlight those factors - especially those that relate to so-called improved water sources - that contribute to variability in water safety but may not be generally recognized as important by non-experts.

Water quality risks of 'improved' water sources: evidence from Cambodia.

Objectives: The objective of this study was to investigate the quality of on-plot piped water and rainwater at the point of consumption in an area with rapidly expanding coverage of 'improved' water sources.

Methods: Cross-sectional study of 914 peri-urban households in Kandal Province, Cambodia, between July-August 2011. We collected data from all households on water management, drinking water quality and factors potentially related to post-collection water contamination.

Water quality perceptions and willingness to pay for clean water in peri-urban Cambodian communities.

This paper studies household demand for improved water quality in peri-urban Cambodia, with particular attention paid to the influence of water quality on willingness to pay (WTP). Utilizing data from 915 household surveys, we analyze responses to a contingent valuation scenario using multivariate logit regression techniques that account for subjective perceptions of water quality. We estimate a mean household WTP for improved water quality of US$3 (roughly 1.

A comparison of mass transfer coefficients between trickle-bed, hollow fiber membrane and stirred tank reactors.

Trickle-bed reactor (TBR), hollow fiber membrane reactor (HFR) and stirred tank reactor (STR) can be used in fermentation of sparingly soluble gasses such as CO and H2 to produce biofuels and bio-based chemicals. Gas fermenting reactors must provide high mass transfer capabilities that match the kinetic requirements of the microorganisms used. The present study compared the volumetric mass transfer coefficient (K(tot)A/V(L)) of three reactor types; the TBR with 3 mm and 6 mm beads, five different modules of HFRs, and the STR.

Rest-activity disturbances in children with septo-optic dysplasia characterized by actigraphy and 24-hour plasma melatonin profiles.

Introduction: A trial of melatonin treatment in children with septo-optic dysplasia (SOD) and sleep disruption is accepted clinical practice in many centers. However, no objective measurements of sleep/activity patterns with 24-h melatonin profiles have been published for these individuals, and the pathophysiological basis underlying sleep disorders in SOD remains largely unknown.

Methods: We studied six children with rest-activity disturbances and SOD.

The association between narcolepsy and REM behavior disorder (RBD).

Background And Purpose: Rapid eye movement (REM) sleep Behavior Disorder (RBD) is a movement disorder associated with loss of REM-related muscle atonia and is characterized by complex, vigorous and frequently violent dream-enacting behavior during REM sleep. RBD is usually idiopathic or secondary to neurological problems such as Parkinson's disease. This study looked at the association of RBD with another sleep disorder, narcolepsy.

The development of an educational web site for burn care: burnsurgery.org.

Advances in burn care are well documented in the literature but often do not reach health care professionals who treat burn patients. The World Wide Web provides instant access to a wide variety of information globally. We describe the development of www.

Does the sedation resulting from sleep deprivation and lorazepam cause similar cognitive deficits?

It is notoriously difficult to assess the contribution of the sedative effects of benzodiazepines to the cognitive impairments that they produce. The purpose of the present experiment was to determine whether a similar pattern of cognitive impairment would be seen in conditions when subjects felt equally sleepy as the result of sleep deprivation. The effects of a sedative dose of lorazepam (2.