نتایج جستجو برای: pulsed column

تعداد نتایج: 109217  

Journal: :Journal of chromatographic science 2010
Paul McA Harvey Robert A Shellie Paul R Haddad

A dynamic flow model, which maps carrier gas pressures and carrier gas flow rates through the first dimension separation column, the modulator sample loop, and the second dimension separation column(s) in a pulsed-flow modulation comprehensive two-dimensional gas chromatography (PFM-GCxGC) system is described. The dynamic flow model assists design of a PFM-GCxGC modulator and leads to rapid det...

Journal: :Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan 1987

The suitability of three vapor deposition techniques for pore size modification was evaluated using polycarbonate track etched membranes as model supports. A feature scale model was employed to predict the pore geometry after modification and the resulting pure water flux. Physical vapor deposition (PVD) and pulsed plasma-enhanced chemical vapor deposition (PECVD), naturally, form asymmetric na...

Journal: :Journal of the Atomic Energy Society of Japan / Atomic Energy Society of Japan 1987

Journal: :Applied optics 2013
James B Abshire Haris Riris Clark J Weaver Jianping Mao Graham R Allan William E Hasselbrack Edward V Browell

We report on airborne CO(2) column absorption measurements made in 2009 with a pulsed direct-detection lidar operating at 1572.33 nm and utilizing the integrated path differential absorption technique. We demonstrated these at different altitudes from an aircraft in July and August in flights over four locations in the central and eastern United States. The results show clear CO(2) line shape a...

Journal: :journal of nanostructures 2012
m. almasi kashi a. ramazani n. akhshi e. j. khamse z. fallah

coni nanowires were deposited by pulsed electrodeposition technique into porous alumina templates. the effect of off time between pulses (toff) and reductive/oxidative time (treduc/oxid) on the microstructure and magnetic properties of the coni nanowires were investigated. maximum coercivity and squareness were obtained for samples fabricated at treduc/oxid= 0.5 ms and toff =400 ms. the coerciv...

Journal: :The Astrophysical Journal 2022

Abstract We present detailed timing and spectral analyses of the transient X-ray pulsar RX J0209.6−7427 in Small Magellanic Cloud during its 2019 giant outburst. With a better known distance than most galactic pulsars, peak luminosity is determined to be (1.11 ± 0.06) × 10 39 erg s −1 ; it thus bona fide pulsating ultraluminous source (PULX). Owing broad energy band Insight-HXMT, pulsed emissio...

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