Samples of frozen serum of human or bovine origin have been used as an additional standard for blood acid-base analysis. The serum was used to check and compare the performance of two pH electrodes and microequilibration systems. A mean buffer line for the serum was determined at the start of the series. Daily estimations of base excess and standard bicarbonate were made. When any analysis was ...

This paper illustrates the utility of developing compu­ ter models to predict and evaluate performance of com­ plex systems, in this case a dual combustion chamber incinerator of the type normally operated with starved air in the primary chamber, and equipped with a heat recov­ ery boiler. Once the model has been written, it can be used for construction of performance curves and examina­ tion o...

OBJECTIVES To investigate associations between air pollution levels and myocardial infarction (MI) on short timescales, with data at an hourly temporal resolution. DESIGN Time stratified case crossover study linking clinical data from the Myocardial Ischaemia National Audit Project (MINAP) with PM(10), ozone, CO, NO(2), and SO(2) data from the UK National Air Quality Archive. Pollution effect...

dynamic ranges in excess of 100 dB are attainable in pulseecho operation using commercially available discrete mmponents. Transmission experiments through aluminum and composite plates verify more than 100 dB dynamic range and demonstrate the ability of cMUTs to image defects in air at 2.5 MHz. W e also present a variation on cMUT design which improves the useful bandwidth of the device, permit...

Abstract. Isotope-based approaches to study plant water sources rely on the assumption that root uptake and within-plant transport are non-fractionating processes. However, a growing number of studies have reported offsets between source stable isotope composition for wide range ecosystems. These isotopic can result in erroneous attribution used by plants potential overestimations groundwater v...

We have investigated two approaches to enhance and extend H2 photoproduction yields in heterocystous, N2-fixing cyanobacteria entrapped in thin alginate films. In the first approach, periodic CO2 supplementation was provided to alginate-entrapped, N-deprived cells. N deprivation led to the inhibition of photosynthetic activity in vegetative cells and the attenuation of H2 production over time. ...

Propylene glycol and glycol ether (PGE) in indoor air have recently been associated with asthma and allergies as well as sensitization in children. In this follow-up report, sources of the PGEs in indoor air were investigated in 390 homes of pre-school age children in Sweden. Professional building inspectors examined each home for water damages, mold odour, building's structural characteristics...

Excess functions ........................................................................................................................................ 1 Mathematical explanation ..................................................................................................................... 1 Physical example: Molar volume of a pure substance ................................................

An earlier study established that the attenuation of z0 ultrasound in freshly excised dog lung at 1 MHz was unusually high, viz., more than an order of magnitude greater than air and greatly in excess of that exhibited by other soft tissues. • The opportunity to conduct such measurements as a function of frequency has since become available and the following is an initial reporting of this inve...