Results 291 to 300 of about 217,951 (354)
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Secondary standard stars for absolute spectrophotometry
, 1983Based on an adopted absolute spectral energy distribution for the primary standard star Alpha Lyrae, absolute fluxes are given for the four very metal-deficient F type subdwarfs HD 19445, HD 84937, BD + 26.2606 deg, and BD + 17.4703 deg.
J. B. Oke, J. Gunn
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Chemical Communications, 2018
We proposed a π-conjugation enhanced molar absorption coefficient strategy that can effectively improve the sensitivity of the spectrophotometry sensing technique.
Lijuan Zhang +3 more
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We proposed a π-conjugation enhanced molar absorption coefficient strategy that can effectively improve the sensitivity of the spectrophotometry sensing technique.
Lijuan Zhang +3 more
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Talanta, 1980
A review is given of the development of spectrophotometers from the earliest models to the latest microprocessor instruments with photodiode detection systems.
J R, Majer, A S, Azzouz
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A review is given of the development of spectrophotometers from the earliest models to the latest microprocessor instruments with photodiode detection systems.
J R, Majer, A S, Azzouz
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Current Protocols Essential Laboratory Techniques, 2008
AbstractSpectroscopy is the study of the interaction of light with matter. By observing how light interacts with matter—through reflection, refraction, elastic scattering, absorbance, inelastic scattering, and emission—it is possible to (1) identify the wavelengths of light that interact with atoms and molecules, or (2) quantify the amount of light ...
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AbstractSpectroscopy is the study of the interaction of light with matter. By observing how light interacts with matter—through reflection, refraction, elastic scattering, absorbance, inelastic scattering, and emission—it is possible to (1) identify the wavelengths of light that interact with atoms and molecules, or (2) quantify the amount of light ...
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2017
Darkening patches on the skin can result in great distress for the patient. However, definitive diagnosis between the many possible causes and effective treatment can be very hard for the medical practitioner to achieve. This is the first major professional reference with systematic coverage of diagnosis and the various treatment options, and it will ...
Pampena Riccardo, Longo C
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Darkening patches on the skin can result in great distress for the patient. However, definitive diagnosis between the many possible causes and effective treatment can be very hard for the medical practitioner to achieve. This is the first major professional reference with systematic coverage of diagnosis and the various treatment options, and it will ...
Pampena Riccardo, Longo C
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Colorimetry by Abridged Spectrophotometry
Journal of the Optical Society of America, 1949It seems to be generally conceded that the results obtained with a photoelectric colorimeter are significant only when the spectral characteristics of the sample and standard are similar. When this is the case, the selected ordinate method of integrating spectrophotometric data can be greatly abridged, a single selected ordinate being adequate under ...
F. Mansfield Young, Arthur C. Hardy
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, 2016
A very simple protocol for teaching Beer’s Law and absorption spectrophotometry using a smart phone is described. Materials commonly found in high school chemistry laboratories or even around the house may be used.
Thomas S. Kuntzleman, Erik Jacobson
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A very simple protocol for teaching Beer’s Law and absorption spectrophotometry using a smart phone is described. Materials commonly found in high school chemistry laboratories or even around the house may be used.
Thomas S. Kuntzleman, Erik Jacobson
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The determination of chromic oxide in faeces samples by atomic absorption spectrophotometry
Journal of Agricultural Sciences, 1962A rapid and accurate atomic absorption method for the determination of chromium in faeces samples from pasture experiments using chromic oxide ‘markers’ is described.
C. Williams, D. J. David, O. Iismaa
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Spectrophotometry with Gaia [PDF]
, 2010 Gaia is an all-sky survey satellite, to be launched by ESA in late 2011, to obtain parallaxes and proper motions to microarcsecond precision, radial velocities and astrophysical parameters for about 109 objects down to a limiting magnitude of 20mag, which means about 104 times more stars than observed with Hipparcos mission.
J. M. Carrasco +4 more
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, 2016
Magnetic ion imprinted polymers have been prepared and applied for the selective extraction and trace monitoring of cadmium ions in food samples. The characterization of synthesized sorbent was carried out by Fourier transform infrared spectroscopy ...
V. Zarezade +4 more
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Magnetic ion imprinted polymers have been prepared and applied for the selective extraction and trace monitoring of cadmium ions in food samples. The characterization of synthesized sorbent was carried out by Fourier transform infrared spectroscopy ...
V. Zarezade +4 more
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