نتایج جستجو برای: gas mixture

تعداد نتایج: 331788  

Journal: :The European respiratory journal 1990
A Huszczuk B J Whipp K Wasserman

We have developed a method for simulating respiratory gas exchange for on-line calibration of metabolic measurement systems. It utilizes a pump which intakes a mixture of atmospheric air and a known flow of precision-analysed calibration gas (21% CO2, 79% N2). It expels the resulting mixture with flow wave form and profiles of gas concentration which closely resemble those of normal expiration....

Journal: :Journal of King Saud University - Science 2019

Journal: :Journal of the Acoustical Society of Japan (E) 1997

Journal: :The Journal of the Acoustical Society of America 2005
Johan E Carlson Pär-Erik Martinsson

Within Sweden and the EU, an increased use of biogas gas and natural gas is encouraged to decrease emission of carbon dioxide. To support more effective manufacturing, distribution, and consumption of energy gases, new methods for the measurement of the calorimetric value or the gas composition are needed. This paper presents a method to extract and visualize variations in ultrasound pulse shap...

2013
Ki-Young Dong Jinnil Choi Yang Doo Lee Byung Hyun Kang Youn-Yeol Yu Hyang Hee Choi Byeong-Kwon Ju

Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor s...

Journal: :JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 1974

Journal: :Continuum Mechanics and Thermodynamics 2005

Journal: :Journal of applied physiology 2004
Gavin J B Robinson Philip J Peyton David Terry Shiva Malekzadeh Bruce Thompson

Measurement of pulmonary gas uptake and elimination is often performed, using nitrogen as marker gas to measure gas flow, by applying the Haldane transformation. Because of the inability to measure nitrogen with conventional equipment, measurement is difficult during inhalational anesthesia. A new method is described, which is compatible with any inspired gas mixture, in which fresh gas and exh...

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