Results 1 to 10 of about 76,966 (163)

Ultraviolet spectroscopy of pressurized and supercritical carbon dioxide [PDF]

open access: yesCommunications Chemistry, 2021
CO2 is prominent in the Earth’s and exoplanetary atmospheres, but its excited state photochemistry is not yet fully understood. Here the authors identify gradual quenching of the diffuse vibrational structure in supercritical CO2 electronic spectra under
Timothy W. Marin, Ireneusz Janik
doaj   +2 more sources

Ozone Detection via Deep-Ultraviolet Cavity-Enhanced Absorption Spectroscopy with a Laser Driven Light Source

open access: yesSensors, 2023
We present a novel sensing approach for ambient ozone detection based on deep-ultraviolet (DUV) cavity-enhanced absorption spectroscopy (CEAS) using a laser driven light source (LDLS).
Anthony Puga, Azer Yalin
doaj   +3 more sources

Ultraviolet-visible spectroscopy of graphene oxides

open access: yesAIP Advances, 2012
Dispersions of few-layer (1-3 layers), multi-layer (4-10 layers) and thick-layer (>10 layers) graphene oxide (GO) were prepared by a modified Hummers method with different mass ratios of KMnO4 to graphite.
Qi Lai   +4 more
doaj   +2 more sources

Free-running ultraviolet dual comb spectroscopy enabling absolute electronic fingerprinting [PDF]

open access: yesPhotoniX
Ultraviolet (UV) spectroscopy reveals electronic transitions in matter that underpin atmospheric photochemistry and molecular dynamics. While dual-comb spectroscopy (DCS) has revolutionized precision measurements in the infrared region and expanded to ...
Lukas Fürst   +8 more
doaj   +2 more sources

UV-activated assisted electrochemical process for mine water deep mineralization and resource recovery [PDF]

open access: yesNature Communications
High-salinity mine water generated during membrane concentration of mine water contains structurally stable complex organic matter that resists removal and mineralization by conventional advanced oxidation processes, ultimately producing low-value by ...
Xiangyun Liu   +8 more
doaj   +2 more sources

Early-time Ultraviolet and Optical Hubble Space Telescope Spectroscopy of the Type II Supernova 2022wsp

open access: yesThe Astrophysical Journal Letters, 2023
We report early-time ultraviolet (UV) and optical spectroscopy of the young, nearby Type II supernova (SN) 2022wsp obtained by the Hubble Space Telescope (HST)/STIS at about 10 and 20 days after the explosion.
Sergiy S. Vasylyev   +12 more
doaj   +1 more source

Effects of Mesona chinensis Benth Polysaccharide on the Physicochemical Properties and Structural Characteristics of Myosin [PDF]

open access: yesShipin Kexue, 2023
The effects of different concentrations (0–0.10 mg/mL) of Mesona chinensis Benth polysaccharide (MCP) on the physicochemical properties (potential, particle size, surface hydrophobicity, and sulfhydryl groups), structural properties (determined by ...
ZHOU Xinyi, YOU Gang,, GAO Ke’an, DONG Shiyu, MA Shutian, CHEN Shangli, LIU Xiaoling
doaj   +1 more source

A Turbidity-Compensation Method for Nitrate Measurement Based on Ultraviolet Difference Spectroscopy

open access: yesMolecules, 2022
To solve the problem that turbidity in water has a significant effect on the spectra of nitrate and reduces the accuracy of nitrate detection, a turbidity-compensation method for nitrate measurement based on ultraviolet difference spectra is proposed ...
Jing Dong   +3 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

open access: yesHigh 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   +3 more
doaj   +1 more source

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]

open access: yesJournal 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   +6 more
doaj   +1 more source

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