Results 141 to 150 of about 55,934 (323)

Ultraviolet Spectrophotometry of Early-Type Stars

The Astronomical Journal, 1964
Spinning rockets UV spectrophotometry of early type stars, discussing instrumentation, calibration, data recording and stellar ...
openaire   +2 more sources

Heterojunction and Photothermal‐Piezoelectric Polarization Effect Co‐Driven BiOIO3‐Bi2Te3 Photocatalysts for Efficient Mixed Pollutant Removal

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The BiOIO3‐Bi2Te3 photocatalyst possesses superior photocatalytic performance and can effectively remove not only the single RhB, TCH, or Cr(VI) but also the mixture of these three pollutants, which should be attributed to the enhanced visible light absorption and high charge carrier separation efficiency under the co‐driven effect of the type‐II ...
Xiangdong Shi, Qingtao Chen, Xiaoyun Qin, Xianghai Rao, Sihui Li, Guixia Liu, Jinxian Wang, Xiangting Dong, Dan Luo, Fenghua Chen   +9 more
wiley   +1 more source

Spectrophotometric Determination of Hydroxycinnamic Acids in Herbal Drugs. Part 2. Determination of Hydroxycinnamic Acids in the Presence of Polyphenolic Compounds (Review)

Регуляторные исследования и экспертиза лекарственных средств
INTRODUCTION. Polyphenolic compounds of various classes have pronounced absorption bands overlapping in almost the same ultraviolet region. This superposition of bands complicates the quantification of total hydroxycinnamic acids in herbal drugs by ...
E. V. Kompantseva, A. S. Saushkina, A. Yu. Ayrapetova   +2 more
doaj   +1 more source

Monitoring cis-to-trans isomerization of azobenzene using Brillouin microscopy [PDF]

arXiv
Brillouin spectroscopy is commonly used to study the acoustic properties of materials. Here we explored its feasibility in studying the photoinduced isomerization of azobenzene. The isomerization of azobenzene changes the solution elastic modulus, and Brillouin scattering is sensitive to these changes.
arxiv  

The VLT-FLAMES Tarantula Survey XVI. The optical+NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars

, 2014
Context: The commonly used extinction laws of Cardelli et al. (1989) have limitations that, among other issues, hamper the determination of the effective temperatures of O and early B stars from optical+NIR photometry.
Apellániz, J. Maíz, Barbá, R. H., Bestenlehner, J. M., Crowther, P. A., Evans, C. J., García, M., Gräfener, G., Herrero, A., Sana, H., Simón-Díaz, S., Taylor, W. D., van Loon, J. Th., Vink, J. S., Walborn, N. R.   +13 more
core   +1 more source

A Comprehensive Review on Capillary Electrophoresis–Mass Spectrometry in Advancing Biomolecular Research

ELECTROPHORESIS, EarlyView.
ABSTRACT This review provides an in‐depth exploration of capillary electrophoresis–mass spectrometry (CE–MS) in biomolecular research from 2020 to 2024. CE–MS emerges as a versatile and powerful tool due to its numerous advantages, facilitating the analysis of various biomolecules, including proteins, peptides, oligonucleotides, and other metabolites ...
Laura Pont, María Vergara‐Barberán, Enrique Javier Carrasco‐Correa   +2 more
wiley   +1 more source

UTILIZAÇÃO DO ESPECTRÔMETRO DE ABSORÇÃO ATÔMICA PARA DETERMINAÇÃO DE CLORIDRATO DE METFORMINA E CLORIDRATO DE RANITIDINA EM MEDICAMENTOS

Química Nova
The utilization of atomic absorption spectrometer for metformin (MET) and ranitidine (RAN) chlorohydrates determination in medicines is proposed. The spectral lines of nickel and aluminum at 232.0 and 308.2 nm were selected for MET and RAN absorbance ...
Mariana Barbosa André de Souza, Klaiani Bez Fontana, Caroline Gonçalves, Eduardo Sidinei Chaves   +3 more
doaj   +1 more source

Faint white dwarf flux standards: data and models [PDF]

arXiv
Fainter standard stars are essential for the calibration of larger telescopes. This work adds to the CALSPEC (calibration spectra) database 19 faint white dwarfs (WDs) with all-sky coverage and V magnitudes between 16.5 and 18.7. Included for these stars is new UV (ultraviolet) HST (Hubble Space Telescope) STIS (Space Telescope Imaging Spectrometer ...
arxiv  

The nautre of dwarf novae and related systems [PDF]

The high energy emissions from cataclysmic variables (interacting binary systems containing an accreting white dwarf) and the relationship of the high energy emission of these stars to their optical properties were investigated.
Lampton, M.
core   +1 more source

A Practical Approach to Implementing ICH Q14: Tools for Analytical Quality by Design in Capillary Electrophoresis Method Development

ELECTROPHORESIS, EarlyView.
ABSTRACT The ICH Q14 guideline introduces a structured framework for analytical method development based on Analytical Quality by Design (AQbD) principles, aiming to ensure robust, reliable, and fit‐for‐purpose methods throughout the product lifecycle.
Ewoud van Tricht, Cari E. Sänger ‐ van de Griend   +1 more
wiley   +1 more source