Results 11 to 20 of about 64,528 (217)

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
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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
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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
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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
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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

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

Far-ultraviolet to Near-infrared Observations of SN 2023ixf: A High-energy Explosion Engulfed in Complex Circumstellar Material

The Astrophysical Journal Letters, 2023
We present early-phase panchromatic photometric and spectroscopic coverage spanning the far-ultraviolet to near-infrared regime of the nearest hydrogen-rich core-collapse supernova (SN) in the last 25 yr, SN 2023ixf.
Rishabh Singh Teja, Avinash Singh, Judhajeet Basu, G. C. Anupama, D. K. Sahu, Anirban Dutta, Vishwajeet Swain, Tatsuya Nakaoka, Utkarsh Pathak, Varun Bhalerao, Sudhanshu Barway, Harsh Kumar, Nayana A. J., Ryo Imazawa, Brajesh Kumar, Koji S. Kawabata   +15 more
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Chemical Composition and Spectroscopic Characteristics of Heat-Treated Rubies from Madagascar, Mozambique and Tanzania

Crystals, 2023
The chemical composition and spectra of rubies heat-treated with high temperatures (above 1200 °C) from Madagascar, Mozambique and Tanzania were analyzed by electron microprobe, LA-ICP-MS, Fourier transform infrared spectroscopy, Raman spectroscopy and ...
Ling Yang, Qi Lu, Di Ma, Hairong Zheng, Ruoshui Hu, Zhuohang Shi, Binrong Qin   +6 more
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Effect of molecular weight on the optical properties of polyimide films

Results in Chemistry
To investigate the effect of molecular weight on the optical properties, a series of polyimide films with varying molar ratios of pyromellitic dianhydride (PMDA) to 4,4′-diaminodiphenyl ether (ODA) were synthesized.
Panpan Zhang, Ting Du
doaj   +1 more source

Ultrafast One-Photon (232 vs 266 nm) Bond-Selective Photochemistry of Bromoiodomethane (CH2BrI) in Solution

EPJ Web of Conferences, 2013
Ultrafast broadband transient absorption spectra measured from the deep-ultraviolet to the near-infrared region following single-photon excitation of bromoiodomethane in acetonitrile at different wavelengths manifest chromophore -selective structural ...
Panov M. S., Mereshchenko A. S., Butaeva E. V., Tarnovsky A. N.   +3 more
doaj   +1 more source