Results 11 to 20 of about 209,601 (301)

Absorption and Fluorescence Spectroscopy of 1,2 : 3,4-Dibenzanthracene

International Journal of Photoenergy, 2012
Polycyclic aromatic hydrocarbon compound, 1,2 : 3,4-dibenzanthracene, is spectroscopically analyzed in ethanol. Ultraviolet absorption spectra were taken and fluorescence measurements were performed.
Fuat Bayrakceken, Korkut Yegin, Erdal Korkmaz, Yakup Bakis, Bayram Unal   +4 more
doaj   +1 more source

Spectral Analyses of a Novel Ibuprofen-Phillygenin Ester

Chinese Journal of Magnetic Resonance, 2018
An ibuprofen-phillygenin ester was synthesized through the Schotten-Baumann reaction with ibuprofen and phillygenin as the starting materials. Ultraviolet absorption (UV) spectrum, infrared absorption (IR) spectrum, matrix-assisted laser desorption ...
FAN Hong-yu
doaj   +1 more source

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

X-ray Spectroscopy of QSOs with Broad Ultraviolet Absorption Lines [PDF]

, 2001
For the population of QSOs with broad ultraviolet absorption lines, we are just beginning to accumulate X-ray observations with enough counts for spectral analysis at CCD resolution. From a sample of eight QSOs [including four Broad Absorption Line (BAL)
Bade N., Brinkmann W., G. Chartas, G. P. Garmire, S. C. Gallagher, W. N. Brandt   +5 more
core   +3 more sources

Iron in Hot DA White Dwarfs [PDF]

, 2006
We present a study of the iron abundance pattern in hot hydrogen-rich (DA) white dwarfs. The study is based on new and archival far ultraviolet spectroscopy of a sample of white dwarfs in the temperature range 30,000 K < T_eff < 64,000 K.
Heber U., Jean Dupuis, Pierre Chayer, Stephane Vennes, Thierry Lanz, Voges W., Wolff B.   +6 more
core   +3 more sources

Exploration of the Origin of the UV Absorption Performance of Windmill Palm Fiber

BioResources, 2016
This study aims to investigate the ultraviolet (UV) absorption property of palm fiber and to reveal the mechanism underlying its UV-shielding behavior. The UV spectra of various solvent extracts of palm fiber were investigated. Fourier transform infrared
Shu Wang, Tonghua Zhang, Jiali Li, Limei Fang, Xingxing Liu, Min Guo   +5 more
doaj   +1 more source

Spectroscopic Studies of Delafloxacin Meglumine

Chinese Journal of Magnetic Resonance, 2021
The structure of delafloxacin meglumine was analyzed by infrared absorption (IR), ultraviolet absorption (UV), nuclear magnetic resonance (1H NMR, 13C NMR, DEPT, 1H-1H COSY, 1H-13C HSQC and 1H-13C HMBC) spectroscopy, mass spectrometry and elemental ...
Xin-yi ZHAO, Dong HAN, Hong-jun LUO, Wen-bin SHEN, Gong-jun YANG   +4 more
doaj   +1 more source

Analysis of Spectral Characteristics of Certain Polyene Antibiotics in the Presence of Dmso and Cholesterol

Антибиотики и Химиотерапия
This work presents ultraviolet (UV) spectra of various concentrations of polyene antibiotics. The spectra of Levorin and Amphotericin B differ in three main absorption maxima.
G. H. Sultanova, T. J. Pashazade, Kh. M. Kasumov   +2 more
doaj   +1 more source

Spectral Analyses and Structural Elucidation of Cyflumetofen

Chinese Journal of Magnetic Resonance, 2020
Cyflumetofen is a new type of acaricide with high efficiency and low residue. In this work, the compound was characterized by infrared absorption (IR), ultraviolet absorption (UV) and mass spectrometry, as well as nuclear magnetic resonance spectroscopy (
ZHANG Yi-ming, CHEN Zhi-xue, YANG Xiao-yun   +2 more
doaj   +1 more source

A broadband optical cavity spectrometer for measuring weak near-ultraviolet absorption spectra of gases [PDF]

Atmospheric Measurement Techniques, 2011
Accurate absorption spectra of gases in the near–ultraviolet (300 to 400 nm) are essential in atmospheric observations and laboratory studies. This paper describes a novel incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) instrument ...
J. Chen, D. S. Venables
doaj   +1 more source