Results 11 to 20 of about 103,827 (310)

A useful quantitative model for determination of enantiomeric composition of racemate praziquantel by ultraviolet spectroscopy combined with partial least squares and its application to praziquantel tablets [PDF]

Journal of Innovative Optical Health Sciences, 2018
A simple and novel method has been proposed to determine the enantiomeric composition of racemate praziquantel (PZQ) by using the analysis of ultraviolet (UV) spectroscopy combined with partial least squares (PLS). This method does not rely on the use of
Man Zhao, Ran Meng, Yifang Lu, Lingyun Hu, Na Sun, Lei Nie, Haina Wang   +6 more
doaj   +1 more source

Influence of ageing on oil degradation and gassing tendency under high-energy electrical discharge faults for mineral oil and synthetic ester

High Voltage, 2020
In this work, mineral oil and synthetic esters were selected at different ageing factors (based on acidity values). Fresh and aged oils have been subjected to high-energy discharges (repeated 100 breakdowns) to simulate electric faults of highly ...
L. Loiselle, U. Mohan Rao, I. Fofana, I. Fofana   +3 more
doaj   +1 more source

Ultraviolet Spectroscopy Of Subcritical And Supercritical Ethanol [PDF]

, 2022
Vacuum ultraviolet spectroscopy was used to investigate the lowest-lying electronic state band edge of subcritical ethanol as a function of temperature from 25-200 $^{\circ}$C, and for supercritical ethanol as a function of density at 250 $^{\circ}$C ...
Marin, Timothy W.
core   +1 more source

Vibrationally Resolved Absorption and Fluorescence Cross Sections of Adamantane in the Far-ultraviolet Spectral Range on an Absolute Scale

The Astrophysical Journal Supplement Series, 2023
High-resolution absorption, dispersed fluorescence emission, and photoionization cross sections are presented for gas-phase adamantane excited by synchrotron radiation in the exciting-photon energy range of 6–30 eV. Relative and absolute absorption cross
Lutz Marder, Alexander Breier, Nelson de Oliveira, Philipp Reiss, Philipp Schmidt, Christian Ozga, Catmarna Küstner-Wetekam, Thomas Giesen, Laurent Nahon, Andreas Hans, André Knie, Arno Ehresmann   +11 more
doaj   +1 more source

Ultraviolet dual comb spectroscopy: a roadmap

Optics Express, 2021
Dual Comb Spectroscopy proved its versatile capabilities in molecular fingerprinting in different spectral regions, but not yet in the ultraviolet (UV). Unlocking this spectral window would expand fingerprinting to the electronic energy structure of matter.
Schuster, Vittoria, Liu, Chang, Klas, Robert, Dominguez, Pablo, Rothhardt, Jan, Limpert, Jens, Bernhardt, Birgitta   +6 more
openaire   +4 more sources

Research on Correction Method of Water Quality Ultraviolet-Visible Spectrum Data Based on Compressed Sensing

Journal of Spectroscopy, 2021
The turbidity interference caused by suspended particles in water seriously affects the accuracy of ultraviolet-visible spectroscopy in detecting water quality chemical oxygen demand.
Fengxiao Li, Bin Tang, Mingfu Zhao, Xinyu Hu, Shenghui Shi, Mi Zhou   +5 more
doaj   +1 more source

Photocatalyst Ag@N/TiO2 Nanoparticles: Fabrication, Characterization, and Investigation of the Effect of Coating on Methyl Orange Dye Degradation [PDF]

Journal of Nanostructures, 2017
In this research, N-doped TiO2 (N/TiO2) nanoparticles have been synthesized by a sol-gel method. N/TiO2 nanoparticle has been coated with Ag metal by photochemical method.
Pourya Mehdizadeh, Zahra Tavangar
doaj   +1 more source

Multi-product multivariate calibration: determination of quality parameters in soybean industrialized juices

Acta Scientiarum: Technology, 2019
Total acidity and vitamin C were determined by using ultraviolet spectroscopy and multi-product multivariate calibration alternately to the reference methods, the potentiometry and Tillman's, respectively.
Dayane Aparecida dos Santos, Karen Priscila de Lima, Marcilene Ferrari Barriquello Consolin, Nelson Consolin Filho, Paulo Henrique Março, Patrícia Valderrama   +5 more
doaj   +1 more source

Ultraviolet photoelectron spectroscopy: Practical aspects and best practices

Applied Surface Science Advances, 2023
Ultraviolet photoelectron spectroscopy (UPS) is an important technique for measuring the energies of the valence states of metallic, semiconducting and adsorbate-covered metal and semiconducting surfaces.
James E. Whitten
doaj   +1 more source

Determination of desulpho-glucosinolates in bolting stems of Chinese kale by liquid chromatography-mass spectrometry

浙江大学学报. 农业与生命科学版, 2008
The crude glucosinolates (GSs) were extracted from bolting stems of Chinese kale (Brassica alboglabra) and purified by a column packed with DEAE Sephadex A-25. The desulpho-glucosinolates were obtained after desulfurizing of GSs by sulfatase.
LA Gui-xiao, FANG Ping, LI Ya-juan, WANG Yue   +3 more
doaj   +1 more source