laser induced fluorescence
laser induced fluorescence
laser induced fluorescence
Laser-induced fluorescence (LIF) spectroscopy is of great importance for environmental monitoring. Besides outstanding sensitivity and good selectivity, particular advantages of the LIF technique include the capabilities for in situ analysis and remote sensing. The
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The U.S. Department of Energy's Office of Scientific and Technical Information
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Laser Induced Fluorescence. Planar Laser Induced Fluorescence (PLIF = LIF Imaging) is a very sensitive laser imaging technique for species concentration, mixture fraction and temperature measurements in fluid mechanical processes, sprays and combustion systems. LIF imaging is a molecule specific visualization method with high spatial and
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Laser induced fluorescence spectroscopy in the ultraviolet regime has been used for the detection of biochemical through a fiber coupled CCD detector from a distance of 2 m. The effect of concentration and laser excitation energy on the fluorescence spectra of nicotinamide adenine dinucleotide (NADH
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Laser-Induced Fluorescence (LIF) The interaction of a laser beam with an atom, ion or molecule may results in excitation to a higher quantum state. A process of excitation is more likely to occur when the laser is tuned to the energy difference between this original lower state and an upper (excited) state. Such an event is accompanied by
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12/04/2022 · This article presents examples of proprietary applications of laser-induced fluorescence (LIF) in medicine with such methods. A classic example is the analysis of photosensitizers using the photodynamic treatment method (PDT). The level and kinetics of accumulation and excretion of sensitizers in the body are examined, as well as the optimal
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2.3 Three level scheme of laser induced fluorescence . Laser induced fluorescence (LIF) is a spectroscopy technique used for the detection of certain species. Laser light with wavelength 𝜆, corresponding to an excitation wavelength of the species under investigation, irradiates the gas sample.
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National Center for Biotechnology Information
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the fluorophores such as fluorescence life-time and ab-sorption cross-section, and the presence of lumines-cence quenchers in the water is relevant as well. Several publications5,6,8,9 report on fluorescence satura-tion of organic dyes in water. This technique, called spectroscopy of saturated fluorescence, makes use of
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Chekalyuk, AM, Fadeev, VV & Gorbunov, MY 1992, Theoretical and experimental study of laser-induced in-vivo chlorophyll fluorescence. in Quantum Electronics and Laser Science Conference, QELS 1992., QThD27, Optics InfoBase Conference Papers, Optica Publishing Group (formerly OSA), Quantum Electronics and Laser Science Conference, QELS 1992
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DOI: 10.1016/j.optcom.2022.128914 Corpus ID: 251890663; A portable UAV-based laser-induced fluorescence lidar system for oil pollution and aquatic environment monitoring @article{Sun2022APU, title={A portable UAV-based laser-induced fluorescence lidar system for oil pollution and aquatic environment monitoring}, author={Lanjun Sun and Yanchao Zhang and Chensui Ouyang and Songlin Yin and Xiuyun
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My Life with LIF: A Personal Account of Developing Laser-Induced Fluorescence Richard N. Zare Annual Review of Analytical Chemistry Effects of Saturation on Laser-Induced Fluorescence Measurements of Population and Polarization R Altkorn, and and R N Zare
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Laser induced fluorescence experiment Posted on 29.10. (01.07. ) by George Fomitchev In the experiment, we are using 3 types of lasers: red 650 nm, green 532 nm, blue 450 nm. Here we used various concentrations of chlorophyll and fluorescein and olive oil as fluorescence liquids.
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Planar-Laser-Induced Fluorescence (PLIF) is an optical diagnostic that can probe a single chemical species, such as the hydroxyl radical or the methylidine radical, in a chemically reacting flow field, providing information about the concentration, temperature, location, lifespan, and distribution of that species in the test region.
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Two-color Planar Laser Induced Fluorescence (LIF) was used to experimentally capture the temperature profile above a horizontally oriented copper surface using PF-5060 as the dielectric working fluid.
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X(1,0) transition using a quasi-linear laser-induced fluorescence scheme. The peak number density is (1.0 ± 0.4)x10 13 cm -3 or 2.4 ± 1 ppm at 1900 K, with a flame front width of 250 µm
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Laser Induced Fluorescence (LIF) LIF imaging is a molecule specific visualization method with high spatial and temporal resolution. If the fluid itself contains no LIF-active species (like N2, CH4 or water), flow seeding with fluorescent markers (tracers) is used for scalar flow field imaging (Tracer-LIF). Laser imaging applications in fluid
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Planar laser-induced fluorescence (PLIF) is an optical diagnostic technique widely used for flow visualization and quantitative measurements. PLIF has been shown to be used for velocity, concentration, temperature and pressure measurements. Working. A PLIF setup consists of a source of light (usually a
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Planar Laser-Induced Fluorescence, or PLIF, is an optical measurement technique based upon fluorescence emitted from chemical species excited by planar laser light. Essentially a sheet of laser light is passed through a flow field, and the subsequent fluorescence relaxation event is captured on a digital camera.
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The research presented here aims at providing a deeper understanding of the formation of nitric oxide in diesel combustion. To this end, in-cylinder distributions of nitric oxide (NO) were acquired by laser-induced fluorescence (LIF) in a rapid compression machine at conditions representative of a modern diesel passenger vehicle.
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Laser Induced Fluorescence LIF Fundamentals and Applications TSI Inc. Model 9510- BD BioTrak Real-time viable particle counter © TSI Incorporated 11/12/ 2 What is fluorescence? +Molecule absorbs energy from light source +Some energy is lost to molecular vibrations +Remaining energy released as light at a higher wavelength
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Laser-induced fluorescence (LIF) of a perylene-doped model oil was measured from aluminum oxide, quartz sand and soil surfaces over a period of 72 h. The long-term signal decrease was strongest in the soil which is possibly related to the incorporation of perylene into the soil matrix and to the formation of non-fluorescent bound residues.
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29/08/ · The laser-induced fluorescence is based on the fluorophore excitation by electromagnetic radiation. Generally, the radiation used to induce the fluorescence is near-UV
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30/05/ · Laser-induced fluorescence (LIF) is an interesting combination of absorption and emission spectroscopy. It is naturally more complicated than either of these methods alone, both experimentally and theoretically. In return, it offers higher sensitivity compared to single-pass absorption measurements, good spatial resolution given by intersection
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Laser-induced fluorescence (LIF) is an interesting combination of absorption and emission spectroscopy. It is naturally more complicated than either of these methods alone, both experimentally and theoretically.
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Laser-induced fluorescence (LIF) is a diagnostic technique leveraging the spontaneous emission of light from an excited atom or molecule. A target chemical species such as carbon dioxide (CO 2), hydroxyl (OH), nitric oxide (NO), or potassium (K) is excited to a high-energy state with a laser.As the excited-state species returns to its original energy state, it emits a photon through the
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12/08/ · Instrument composition: Like ordinary fluorescence detectors, laser-induced fluorescence detectors are mainly composed of light sources, optical systems, detection cells, and light detection elements. The most important difference between the two is that the light source of laser-induced fluorescence detectors is a laser.
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01/11/ · Laser-induced fluorescence is used to measure ion velocity distributions in a Hall effect thruster plume. Images of ion velocity scaled to fluorescence peak magnitude provide a graphical
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4-BPA is a phenoxyacetic acid, and a variety of analytical methods for phenoxyacetic acid detection have been developed, including capillary electrophoresis with laser-induced fluorescence , ultra-high liquid chromatography-mass spectrometry , headspace gas chromatography high-performance liquid chromatography and electrochemical methods [11,12
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Laser Induced Fluorescence (LIF) is an optical spectroscopic technique where a sample is excited with a laser, and the fluorescence emitted by the sample is subsequently captured by a photodetector. LIF can be understood as a class of fluorescence spectroscopy where the usual lamp excitation is replaced by a laser source.
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