Results 281 to 290 of about 129,172 (353)
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Sensors and Actuators B: Chemical, 2018
A new fluorescent reagent, 4,5-dimethoxyphthalaldehyde (M2OPA) is synthesized for the determination of ammonium in environmental waters. M2OPA has a similar molecular structure as o-phthalaldehyde (OPA), a commonly used fluorescent probe for ammonium ...
Min Zhang +3 more
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A new fluorescent reagent, 4,5-dimethoxyphthalaldehyde (M2OPA) is synthesized for the determination of ammonium in environmental waters. M2OPA has a similar molecular structure as o-phthalaldehyde (OPA), a commonly used fluorescent probe for ammonium ...
Min Zhang +3 more
semanticscholar +1 more source
ACS Sensors, 2018
The sensitive simultaneous detection of multiple biomarkers is critical for the early diagnosis of diseases. Electrochemiluminescence (ECL) offers outstanding advantages, e.g., low background, over other optical sensing techniques.
Yanqin Lv +6 more
semanticscholar +1 more source
The sensitive simultaneous detection of multiple biomarkers is critical for the early diagnosis of diseases. Electrochemiluminescence (ECL) offers outstanding advantages, e.g., low background, over other optical sensing techniques.
Yanqin Lv +6 more
semanticscholar +1 more source
A Spot Fluorometer for Protein Determination
Hoppe-Seyler´s Zeitschrift für physiologische Chemie, 1979An apparatus is described which allows spot fluorometry in situ for quantitative evaluation of protein spots stained with a fluorochrome (Hoechst 2495).
H G, Zimmer, F, Kiehl, V, Neuhoff
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Fiberoptic Fluorometer for Skin Flap Assessment
Otolaryngology–Head and Neck Surgery, 1983The fiberoptic fluorometer permits quantitative measurement of fluorescence after intravenous administration of fluorescein. Accurate assessment of tissue fluorescence can be made at any time after the injection, and both uptake and elimination of fluorescein can be followed.
R A, Weisman, D G, Silverman
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Versatile Spectrophotofluorometer-Polarization Fluorometer
Review of Scientific Instruments, 1968A highly versatile spectrophotofluorometer with unique optical as well as electronic features is described. In addition to corrected excitation, emission, and polarization spectra, absorption and transmission spectra can also be produced. Spectra may be recorded as a function of wavelength or wavenumber.
Bernard Witholt, Ludwig Brand
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Fluorometer for endoscopic diagnosis of tumors
Medical Physics, 1984A filter fluorometer suitable for endoscopic applications has been developed for detection and characterization of superficial tumors by the fluorescence of a previously injected, tumor‐specific agent, hematoporphyrin derivative. Fluorescence is excited by violet light conducted through a fiberoptic lightguide in the endoscope, and the fluorescence ...
A E, Profio, D R, Doiron, J, Sarnaik
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Sensitive time-resolved fluorometer
SPIE Proceedings, 2005With the use of lanthanide trivalence ion and its chelates for marking substance, Time-resolved Fluorescence Immunoassay (TRFIA) is superior to RIA in sensitivity, speciality, stability. And it has become one of the hotspots in the field of labeled immunoassay application.
Zhen Tian, Zhouyi Guo
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Hand-held thermal-regulating fluorometer
Review of Scientific Instruments, 2005This article relates to the construction of a portable, low cost, thermal-regulating light-emitting diode (LED)-based, handheld fluorometer. This regulated fluorometer is based on both a low thermal mass infrared heater, and an orthogonal geometry LED-based filter fluorometer.
Andrew S. Farmer +3 more
exaly +2 more sources
Journal of the Optical Society of America, 1941
A method is described for the measurement of the rise and decay of luminescence in phosphors excited by cathode-ray beams. It is particularly suited to the investigation of phosphors classed as fast, i.e., those in which major changes in intensity occur in a few microseconds.
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A method is described for the measurement of the rise and decay of luminescence in phosphors excited by cathode-ray beams. It is particularly suited to the investigation of phosphors classed as fast, i.e., those in which major changes in intensity occur in a few microseconds.
openaire +1 more source