نتایج جستجو برای: oxygen sensor

تعداد نتایج: 394025  

2007
P. A. Kyriacou K. Shafqat S. K. Pal

Pulse oximetry has been one of the most significant technological advances in clinical monitoring in the last two decades. Pulse oximetry is a non-invasive photometric technique that provides information about the arterial blood oxygen saturation (SpO2) and heart rate, and has widespread clinical applications. When peripheral perfusion is poor, as in states of hypovolaemia, hypothermia and vaso...

Journal: :Applied and environmental microbiology 2007
Mareike Warkentin Heike M Freese Ulf Karsten Rhena Schumann

A new method of respiration rate measurement based on oxygen luminescence quenching in sensor spots was evaluated for the first time for aquatic bacterial communities. The commonly used Winkler and Clark electrode methods to quantify oxygen concentration both require long incubation times, and the latter additionally causes signal drift due to oxygen consumption at the cathode. The sensor spots...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2001
mohammad kazem amini said shahrokhian sharam tangestaninejad iraj mohammadpoor baltork

a carbon-past electrode modified with iron(ii) phathalocyanine (fepc) was used as a sensitive potentiometric sensor for determination of 2-pyridinethiol (2pt). 2-mercaptoethanol (2me) and sulfide ion in aqueous solutions. the modified electrode acts as an electrocatalyst for oxidation of these compounds, and lowers the overpotential for oxidation reactions by more than 400 mv, compared to the u...

Journal: :American Journal of Physiology-Gastrointestinal and Liver Physiology 2019

2003
Xiaolong Wu Ramkumar Sivaraman Ning Li Wei Hang T. W. Darling Yingtao Jiang Woosoon Yim Bingmei Fu

Although liquid lead-bismuth eutectic (LBE) is a good candidate for coolant in the subcritical transmutation blanket, it is known to be corrosive to stainless steel, the material of the carrying tubes and containers. Such longterm corrosion problem can be prevented by producing and maintaining a protective oxide layer on the exposed surface of stainless steel. For this purpose, it is required t...

2009
Noriya Izu Sayaka Nishizaki Woosuck Shin Toshio Itoh Maiko Nishibori Ichiro Matsubara

Temperature compensating materials were investigated for a resistive oxygen sensor using Ce(0.9)Zr(0.1)O(2) as a sensor material for lean-burn engines. The temperature dependence of a temperature compensating material should be the same as the sensor material; therefore, the Y concentration in CeO(2)-Y(2)O(3) was optimized. The resistance of Ce(0.5)Y(0.5)O(2-δ) was independent of the air-to-fue...

2003
Joel A. Silver William R. Wood

A versatile gas sensor for use in gravitational studies and/or long-term monitoring of biological systems in space is described. The sensor combines two diode lasers in a compact, low power package for quantitative, simultaneous measurements of oxygen, carbon dioxide and potentially, water vapor. Wavelength modulation spectroscopy(WMS) combined with digital signal processor (DSP) control allows...

2012
Rok Zaplotnik Alenka Vesel Miran Mozetic

The presented sensor for neutral oxygen atom measurement in oxygen plasma is a catalytic probe which uses fiber optics and infrared detection system to measure the gray body radiation of the catalyst. The density of neutral atoms can be determined from the temperature curve of the probe, because the catalyst is heated predominantly by the dissipation of energy caused by the heterogeneous surfac...

2009
Lee Chow Guangyu Chai

Transferable ZnO tetrapods were grown by an aqueous solution method. An individual ZnO tetrapod-based sensor was fabricated by in situ lift-out technique and its ultraviolet (UV) and gas sensing properties were investigated. This single tetrapod-based device responds to the UV light rapidly and showed a recovery time of about 23 s. The sensitivity of a single ZnO tetrapod sensor to oxygen conce...

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