Results 111 to 120 of about 2,335 (228)

The Abundance of Plasmid‐Mediated Quinolone Resistance Genes in Enterobacter cloacae Strains Isolated from Clinical Specimens in Kermanshah, Iran

Canadian Journal of Infectious Diseases and Medical Microbiology, Volume 2024, Issue 1, 2024.
Background. Enterobacter cloacae (E. cloacae) is one of the most common Enterobacteriaceae causing nosocomial infections. Plasmid‐mediated quinolone resistance (PMQR) determinants have been considered recently. This study evaluated the abundance of PMQR genes in strains of E. cloacae obtained from clinical samples in Kermanshah, Iran. Methods.
Mandana Afsharian, Somayeh Asadi, Camellia Danesh, Reza Sedighi, Kohsar Karimi, Nooshin Miladi, Ronak Miladi, Mohsen Azizi, Nahid Madadi-Goli, Kamal Ahmadi, Mohammad Hossein Zamanian, Mohsin Khurshid   +11 more
wiley   +1 more source

Fiber-Coupled Quartz-Enhanced Photoacoustic Spectroscopy System for Methane and Ethane Monitoring in the Near-Infrared Spectral Range

Molecules, 2020
We report on a fiber-coupled, quartz-enhanced photoacoustic spectroscopy (QEPAS) near-IR sensor for sequential detection of methane (CH4 or C1) and ethane (C2H6 or C2) in air.
Giansergio Menduni, Fabrizio Sgobba, Stefano Dello Russo, Ada Cristina Ranieri, Angelo Sampaolo, Pietro Patimisco, Marilena Giglio, Vittorio M.N. Passaro, Sebastian Csutak, Dario Assante, Ezio Ranieri, Eric Geoffrion, Vincenzo Spagnolo   +12 more
doaj   +1 more source

Influence of the Gain–Bandwidth of the Front-End Amplifier on the Performance of a QEPAS Sensor

Acoustics
The quartz tuning fork used as an acoustic sensor in quartz-enhanced photo-acoustic spectroscopy gas detection systems is usually read out by means of a transimpedance preamplifier based on a low-noise operational amplifier closed in a feedback loop. The
Luigi Lombardi, G. Matarrese, C. Marzocca   +2 more
semanticscholar   +1 more source

Near-infrared laser based cavity ringdown spectroscopy for applications in petrochemical industry [PDF]

, 2018
A simple, economic diode laser based cavity ringdown system for trace-gas applications in the petrochemical industry is presented. As acetylene (C2H2) is sometimes present as an interfering contaminant in the gas flow of ethylene (ethene, C2H4) in a ...
Sigrist, M.W., Vogler, D.E.
core  

Methane, ethane and propane detection using a compact quartz enhanced photoacoustic sensor and a single interband cascade laser [PDF]

, 2019
Hydrocarbon detection in the gas phase represents a powerful tool to guide oil exploration and production operations for the oil & gas industry. This application requires highly sensitive, selective and robust spectroscopic techniques.
Csutak, Sebastian, Deffenbaugh, Max, Giglio, Marilena, Menduni, Giansergio, Passaro, Vittorio, Patimisco, Pietro, Sampaolo, Angelo, Spagnolo, Vincenzo, Tittel, Frank K.   +8 more
core   +1 more source

Widely-tunable mid-infrared fiber-coupled quartz-enhanced photoacoustic sensor for environmental monitoring [PDF]

, 2014
A compact widely-tunable fiber-coupled sensor for trace gas detection of hydrogen sulfide (H2S) in the mid infrared is reported. The sensor is based on an external-cavity quantum cascade laser (EC-QCL) tunable between 7.6 and 8.3 μm wavelengths coupled ...
Borri S., De Natale P., D’Amato F., Patimisco P., Sampaolo A., Scamarcio G., Siciliani de Cumis M., SPAGNOLO, Vincenzo Luigi, Viciani S.   +8 more
core   +1 more source

Atmospheric CH4 and N2O measurements near Greater Houston area landfills using a QCL-based QEPAS sensor system during DISCOVER-AQ 2013 [PDF]

, 2014
A quartz-enhanced photoacoustic absorption spectroscopy (QEPAS)-based gas sensor was developed for methane (CH4) and nitrous-oxide (N 2O) detection. The QEPAS-based sensor was installed in a mobile laboratory operated by Aerodyne Research, Inc.
Griffin R. J., Herndon S. C., Jahjah M., Jiang W., Patimisco P., Ren W., Sanchez N. P., Spagnolo V., Tittel F. K.   +8 more
core   +1 more source

A Mid-infrared QEPAS sensor device for TATP detection

Journal of Physics: Conference Series, 2009
Recent developments of external cavity quantum cascade lasers (EC-QC lasers) enable new applications in laser spectroscopy of trace gas species in the mid-infrared spectral region. We report the application of quartz enhanced photo acoustic spectroscopy (QEPAS) with widely tuneable EC-QC lasers as excitation sources for chemical sensing of different ...
C Bauer, U Willer, R Lewicki, A Pohlkötter, A Kosterev, D Kosynkin, F K Tittel, W Schade   +7 more
openaire   +1 more source

Quartz-Enhanced Photoacoustic Spectroscopy with Right-Angle Prism

Sensors, 2016
A right-angle prism was used to enhance the acoustic signal of a quartz-enhanced photoacoustic spectroscopy (QEPAS) system. The incident laser beam was parallelly inverted by the right-angle prism and passed through the gap between two tuning fork prongs
Yongning Liu, Jun Chang, Jie Lian, Zhaojun Liu, Qiang Wang, Zengguang Qin   +5 more
doaj   +1 more source

Measurement precision improving with adaptive Kalman filter for quartz-enhanced photoacoustic spectroscopy methane sensor

AIP Advances
Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) has shown significant progress in trace gas sensing in recent years; however, its detection performance remains constrained by system noise.
Yu Zhou, Li Wang, Yingchao Xie, Hao Xiong, Qilei Zhang, Shenlong Zha   +5 more
doaj   +1 more source