Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Vincent J. Sieben"'
Autor:
Joshua J. Creelman, Edward A. Luy, Gabryelle C. H. Beland, Colin Sonnichsen, Vincent J. Sieben
Publikováno v:
Sensors, Vol 21, Iss 18, p 6250 (2021)
A novel microfluidic optical cell is presented that enables simultaneous measurement of both light absorbance and fluorescence on microlitre volumes of fluid. The chip design is based on an inlaid fabrication technique using clear and opaque poly(met
Externí odkaz:
https://doaj.org/article/90945494181d40129146d904c4a9b09e
Publikováno v:
Micromachines, Vol 12, Iss 8, p 861 (2021)
Reagent-based colorimetric analyzers often heat the fluid under analysis for improved reaction kinetics, whilst also aiming to minimize energy use per measurement. Here, a novel method of conserving heat energy on such microfluidic systems is present
Externí odkaz:
https://doaj.org/article/b8d0beb8d9fd463c92c91db7b3cd7eea
Publikováno v:
Analytical Methods. 14:22-33
In situ sensors are needed to further our understanding of phosphate flux dynamics in marine environments during short term events such as tidal cycles, algae blooms and runoff periods. Here, we present a fully automated in situ phosphate analyzer ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfac3e2743f4ff72f56ecb5df8b23e8c
https://doi.org/10.1039/d1ay01876k
https://doi.org/10.1039/d1ay01876k
Publikováno v:
Sensors, Vol 19, Iss 21, p 4619 (2019)
Presented here is the fabrication and characterization of a tunable microfluidic check valve for use in marine nutrient sensing. The ball-style valve makes use of a rare-earth permanent magnet, which exerts a pulling force to ensure it remains passiv
Externí odkaz:
https://doaj.org/article/e7a78c54a06c4133b657857900b15a8a
Publikováno v:
IEEE Transactions on Circuits and Systems I: Regular Papers. 65:1529-1542
This paper presents a fully integrated RF-powered temperature sensor with non-intermittent operation. The sensor is powered up wirelessly from a 915-MHz incident signal using a power-efficient RF energy harvester, uses a subthreshold ring oscillator
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::845d8b9050826e9b8ca9269a693b3608
https://doi.org/10.1109/tcsi.2017.2758327
https://doi.org/10.1109/tcsi.2017.2758327
Autor:
Vincent J. Sieben, Farshid Mostowfi, Cedric F.A. Floquet, Andrew Speck, Kenneth J. Chau, Shahnawaz Molla
Publikováno v:
Energy & Fuels. 31:5891-5901
We present a surface plasmon resonance (SPR) sensor for crude oils that can be used to directly measure asphaltene deposition onset. Surface plasmon resonance describes a condition in which light incident onto a highly conductive metallic film couple
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e277403fa3f9011d8d5b07aaebfba54
https://doi.org/10.1021/acs.energyfuels.7b00363
https://doi.org/10.1021/acs.energyfuels.7b00363
Autor:
Vincent J. Sieben, John Ratulowski, Collins Obiosa-Maife, Nejib Hamed, Alexander Stickel, Afzal Memon, Jacalyn Rowbotham, Farshid Mostowfi
Publikováno v:
Energy & Fuels. 31:3684-3697
We describe a novel apparatus and method for rapidly separating and measuring four subfractions of crude oil: saturates, aromatics, resins, and asphaltenes (SARA). This work is an extension of our previous work on the microfluidic measurement of asph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::45bc57ef875e443d952c203ac2fa79bf
https://doi.org/10.1021/acs.energyfuels.6b03274
https://doi.org/10.1021/acs.energyfuels.6b03274
Publikováno v:
Analytical Methods. 9:1948-1955
We developed and validated an interference free microfluidic instrument for rapid determination of boron concentration in produced water using the carminic acid assay. Interferences from other species are eliminated by controlling crucial aspects of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b15a35df220c872faff486c1a66c1dd7
https://doi.org/10.1039/c6ay03319a
https://doi.org/10.1039/c6ay03319a
Publikováno v:
Talanta. 150:240-252
Using the carminic acid assay, we determined the concentration of boron in oilfield waters. We investigated the effect of high concentrations of salts and dissolved metals on the assay performance. The influence of temperature, development time, reag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c653297942b06c1acfb87b8c57c20c24
https://doi.org/10.1016/j.talanta.2015.12.010
https://doi.org/10.1016/j.talanta.2015.12.010
Publikováno v:
Energy & Fuels. 30:1933-1946
In this paper, we describe a microfluidic approach for measuring the solubility of asphaltenes in a sample of crude oil. The solubility parameter is an important property in assessing stability of asphaltenes in crude oils and crude mixtures, particu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a03034f75522db6b871f33f836a66d2a
https://doi.org/10.1021/acs.energyfuels.5b02216
https://doi.org/10.1021/acs.energyfuels.5b02216