Results 271 to 280 of about 1,624,767 (350)
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Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2020
Here, we report an ultrasonic-assisted extraction (UAE) of phytochemicals from bark, leaves, sepals, fruits, and seeds of Dillenia pentagyna (Roxb) using different organic solvents such as chloroform, ethanol, and n-hexane.
T. Patle +5 more
semanticscholar +1 more source
Here, we report an ultrasonic-assisted extraction (UAE) of phytochemicals from bark, leaves, sepals, fruits, and seeds of Dillenia pentagyna (Roxb) using different organic solvents such as chloroform, ethanol, and n-hexane.
T. Patle +5 more
semanticscholar +1 more source
, 2020
The effect of the Tauc plot scale and bandgap extrapolation technique on estimated optical bandgap values is often not strongly emphasized. Herein, we demonstrate that the scale of the conventional Tauc plot and the extrapolation technique poses ...
P. R. Jubu, F. Yam, V. Igba, K. P. Beh
semanticscholar +1 more source
The effect of the Tauc plot scale and bandgap extrapolation technique on estimated optical bandgap values is often not strongly emphasized. Herein, we demonstrate that the scale of the conventional Tauc plot and the extrapolation technique poses ...
P. R. Jubu, F. Yam, V. Igba, K. P. Beh
semanticscholar +1 more source
A UV–Vis Photoacoustic Spectrophotometer
Analytical Chemistry, 2014A novel photoacoustic spectrophotometer (PAS) for the measurement of gas-phase and aerosol absorption over the UV-visible region of the spectrum is described. Light from a broadband Hg arc lamp is filtered in eight separate bands from 300 to 700 nm using bandpass interference filters (centered at 301 nm, 314 nm, 364 nm, 405 nm, 436 nm, 546 nm, 578 and ...
Joseph R, Wiegand +2 more
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Carbohydrate Polymers, 2020
Light is a major factor in promoting food aging and deterioration, especially for ultraviolet (UV) light. Herein, bioinspired dopamine-melanin solid nanoparticles with strong absorption at a wide range of 200-2500 nm were first incorporated into alginate/
Manli Yang +4 more
semanticscholar +1 more source
Light is a major factor in promoting food aging and deterioration, especially for ultraviolet (UV) light. Herein, bioinspired dopamine-melanin solid nanoparticles with strong absorption at a wide range of 200-2500 nm were first incorporated into alginate/
Manli Yang +4 more
semanticscholar +1 more source
1990
Die UV/VIS-Spektroskopie befasst sich mit der Wechselwirkung zwischen elektromagnetischer Strahlung und anregungsfahigen Elektronensystemen in Molekulen oder Ionen. Die UV-Spektroskopie umfasst den Strahlungsbereich der Wellenlangen 200 bis 400 nm, die VIS-Spektroskopie 400 bis 800 nm.
P. Wörfel +5 more
+4 more sources
Die UV/VIS-Spektroskopie befasst sich mit der Wechselwirkung zwischen elektromagnetischer Strahlung und anregungsfahigen Elektronensystemen in Molekulen oder Ionen. Die UV-Spektroskopie umfasst den Strahlungsbereich der Wellenlangen 200 bis 400 nm, die VIS-Spektroskopie 400 bis 800 nm.
P. Wörfel +5 more
+4 more sources
In Situ UV-Vis-NIR Absorption Spectroscopy and Catalysis.
Chemical ReviewsThis review highlights in situ UV-vis-NIR range absorption spectroscopy in catalysis. A variety of experimental techniques identifying reaction mechanisms, kinetics, and structural properties are discussed.
Max L. Bols +9 more
semanticscholar +1 more source
Spectrochimica Acta Part A - Molecular and Biomolecular Spectroscopy, 2019
The potential of selected spectroscopic methods - UV-Vis, synchronous fluorescence and NIR as well a data fusion of the measurements by these methods - for the classification of tea samples with respect to the production process was examined.
A. Dankowska, W. Kowalewski
semanticscholar +1 more source
The potential of selected spectroscopic methods - UV-Vis, synchronous fluorescence and NIR as well a data fusion of the measurements by these methods - for the classification of tea samples with respect to the production process was examined.
A. Dankowska, W. Kowalewski
semanticscholar +1 more source
2013
In a UV-Vis (ultraviolet-visible light) spectroscopic measurement, light absorption as a function of wavelength provides information about electronic transitions occurring in the material. For semiconductors, UV-Vis spectroscopy offers a convenient method of estimating the optical band gap, since it probes electronic transitions between the valence ...
Zhebo Chen +13 more
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In a UV-Vis (ultraviolet-visible light) spectroscopic measurement, light absorption as a function of wavelength provides information about electronic transitions occurring in the material. For semiconductors, UV-Vis spectroscopy offers a convenient method of estimating the optical band gap, since it probes electronic transitions between the valence ...
Zhebo Chen +13 more
openaire +1 more source
Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2019
Present paper reports on an algorithm for calculating the equilibrium composition of several compounds mixture if their total (equilibrium) concentrations and the equilibrium constants of reactions between them are known.
A. N. Meshkov, G. Gamov
semanticscholar +1 more source
Present paper reports on an algorithm for calculating the equilibrium composition of several compounds mixture if their total (equilibrium) concentrations and the equilibrium constants of reactions between them are known.
A. N. Meshkov, G. Gamov
semanticscholar +1 more source
2010
Zusammenhang zwischen der Wellenlange des absorbierten Lichts und der beobachteten FarbeUV/Vis Absorption verschiedener ...
Ernö Pretsch +2 more
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Zusammenhang zwischen der Wellenlange des absorbierten Lichts und der beobachteten FarbeUV/Vis Absorption verschiedener ...
Ernö Pretsch +2 more
openaire +1 more source