Results 271 to 280 of about 179,886 (315)

Optical Generation And Detection Of Ultrasound

LEOS '90. Conference Proceedings IEEE Lasers and Electro-Optics Society 1990 Annual Meeting, 1991
The optical generation and detection of ultrasound, often called laser-ultrasonics, has attracted considerable interest and presents numerous advantages for scientific and industrial applications, compared to classical piezoelectric generation and detection.
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Optical spectroscopy for detection of neoplasia

Current Opinion in Chemical Biology, 2002
Fluorescence and reflectance spectroscopy provide the ability to assess tissue structure and metabolism in vivo in real time, providing improved diagnosis of pre-cancerous lesions. Reflectance spectroscopy can probe changes in epithelial nuclei that are important in pre-cancer detection, such as mean nuclear diameter, nuclear size distribution and ...
Konstantin, Sokolov, Michele, Follen, Rebecca, Richards-Kortum   +2 more
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Optical Detection Method

2020
A process for detecting the sensitivity of one or more polymers and/or of one or more mixtures of polymers to a compound, including the steps of exposing a plurality of individualized micro-deposits including the polymer(s) and/or the mixture(s) of polymers to the compound, and detecting, by interferometry, a variation in appearance of an assembly of ...
Senez, Vincent, Vlandas, Alexis, Lamant, Sebastien, Cathala, Bernard, Moreau, Celine, Veronese, Gabrielle, Bozonn, Sophie, Laville, Elisabeth, Cleret, Megane   +8 more
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Optical Generation and Detection of Ultrasound

Strain, 2003
Abstract: This is a review of the optical generation and detection of ultrasound on work carried out in different optical detection techniques at the Strathclyde University. We start by pointing out some limitations of conventional ultrasonic transducers and show how the use of optical‐based transducers can overcome them.
Sorazu, B.L., Thursby, G.J., Culshaw, B., Dong, F., Pierce, S.G., Yang, Y., Betz, D.   +6 more
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Optical detection in microfluidic systems

ELECTROPHORESIS, 2009
AbstractOptical detection schemes continue to be favoured for measurements in microfluidic systems. A selection of the latest progress mainly within the last two years is critically reviewed. Emphasis is on integrated solutions, such as planar waveguides, coupling schemes to the outside world, evanescent‐wave based detectors and the field of ...
Klaus B, Mogensen, Jörg P, Kutter
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Optical Detection

2020
Optical detection is the dominant detection method in microfluidics systems owing to its non-invasive nature, easy coupling, rapid response and high sensitivity. Optical detection methods are applied based on different optical features such as fluorescence, absorbance, surface plasmon resonance, reflectivity and interference.
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OPTICAL DETECTION OF SINGLE MOLECULES

Annual Review of Biophysics and Biomolecular Structure, 1997
Recent advances in ultrasensitive instrumentation have allowed for the detection, identification, and dynamic studies of single molecules in the condensed phase. This measurement capability provides a new set of tools for scientists to address important current problems and to explore new frontiers in many scientific disciplines, such as chemistry ...
S, Nie, R N, Zare
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Optical detection of pulpal blood

Journal of Endodontics, 1994
An optical system to assess blood within the pulpal cavity was developed. The system included a light-emitting diode source, human incisor teeth, and a silicon photodiode detector. An automated syringe pump was used to flow bovine blood lengthwise through the teeth. Transmitted light intensities were recorded at a collection frequency of 20 reading/min
A M, Diaz-Arnold, L R, Wilcox, M A, Arnold   +2 more
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Optical photothermal detection in HPLC

Analytical and Bioanalytical Chemistry, 2003
A mode-mismatched parallel dual-beam thermal lens spectrometer with a far-field single-channel detector system was used as a detector in HPLC. An expert estimation of the measurement results was applied to optimize the optical-scheme configuration of the spectrometer to achieve the longest linear calibration range and highest repeatability under ...
Proskurnin, M. A., Lukyanov, A. Y., Bendrysheva, S. N., Bendryshev, A. A., Pirogov, A. V., Shpigun, O. A.   +5 more
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Nanomaterials for the optical detection of fluoride

Nanoscale, 2017
Recent advances in different nanomaterials-based approaches for optical F− detection via colorimetric, fluorescent and chemiluminescent response are presented.
Yongming Guo, Jing Li, Shuming Chai, Jingjing Yao   +3 more
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