We report on the development of a microelectromechanical systems (MEMS)-scale photoacoustic sensor for the detection of trace gases. A mid-infrared quantum cascade laser (QCL) was used to determine detection limits for acetic acid, acetone, 1,4-dioxane, and vinyl acetate. The source was continuously tunable from 1015 cm(-1) to 1240 cm(-1), allowing for the collection of photoacoustic vibrationa...

The arterial blood gases is one of the most important investigation for assessment of clinical oxygenation and acid-base status in critically ill patients. It provides us with information about ventilation, oxygenation and acid-base status, the three closely interrelated physiology parameters, which maintain the pH homeostasis. Its correct interpretation and application necessitates the knowled...

Obtaining and interpreting blood gases and electrolytes is fundamental to the management of many critically ill veterinary patients. Metabolic and electrolyte alterations are common, and can lead to profound clinical signs affecting many organs (including the heart, skeletal muscle, intestines and the lungs); when severe, death can ensue. This is the second of two articles describing the interp...

delaying bud break, using chemicals is an approach to avoid spring frost damage. therefore, the effect of spraying different concentrations of soybean oil and naphthalene acetic acid (naa) on delaying bud break, altering internal atmosphere and cold hardiness in grape cultivar ‘fakhri’ was studied in 2011 in a commercial vineyard in maryanaj, hamedan using a factorial trial based on randomized ...

the solubility of co2 in the primary, secondary, tertiary and sterically hindered amine aqueous solutions at various conditions was studied. in the present work, the modified kent-eisenberg (m-ke), the extended debye-hückel (e-dh) and the pitzer models were employed to study the solubility of co2 in amine aqueous solutions. two explicit equations are presented to evaluate the concentration of h...

Technological procedure of extracting metals is being constantly modernised so that polluting of the basic life resources is reduced. Emissions of waste gases and particulate matter are still present in larger mining-metallurgical complexes. Mining-metallurgical complex Bor (RTB) exploits sulphide copper ores, thus emitting acid sulphur gases and suspended particles with high content of Cu, Zn,...

Alkyl derivatives of MEA are used in the production of surfactants, dyes, in the manufacture of drugs as a buffer substance and for the stabilization of emulsions, in the manufacture of herbicides, cosmetics, antihistamines, are also of practical interest [1]. It is widely known also as useful “acid” gases (H2S, CO2, SO2, etc.) as absorbents in the process of cleaning process for gases in oil r...