Results 1 to 10 of about 55,310 (175)

An Analysis of the Shapes of Interstellar Extinction Curves. VII. Milky Way Spectrophotometric Optical-through-Ultraviolet Extinction and Its R-Dependence [PDF]

, 2019
We produce a set of 72 NIR through UV extinction curves by combining new HST/STIS optical spectrophotometry with existing IUE spectrophotometry (yielding gapless coverage from 1150 to 10000 Angstroms) and NIR photometry. These curves are used to determine a new, internally consistent, NIR through UV Milky Way Mean Curve and to characterize how the ...
Bohlin, Ralph, Clayton, Geoffrey C., Fitzpatrick, E. L., Gordon, Karl, Massa, Derck   +4 more
arxiv   +6 more sources

Quasars and the Big Blue Bump [PDF]

Astrophys.J. 619 (2005) 41-59, 2004
We investigate the ultraviolet-to-optical spectral energy distributions (SEDs) of 17 active galactic nuclei (AGNs) using quasi-simultaneous spectrophotometry spanning 900-9000 Angstrom (rest frame). We employ data from the Far Ultraviolet Spectroscopic Explorer (FUSE), the Hubble Space Telescope (HST), and the 2.1-meter telescope at Kitt Peak National ...
Anuradha Koratkar, Brinkmann W., Czerny B., Gerard A. Kriss, Ivan Hubeny, Jennifer Scott, Jessica Kim Quijano, John Hutchings, Laor A., Laor A., Mary Elizabeth Kaiser, Michael S. Brotherton, Omer Blaes, Orr M. J. L., Prevot M. L., Richard F. Green, Shakura N. I., Wei Zheng, William Oegerle, Zhaohui Shang   +19 more
arxiv   +3 more sources

An Updated Ultraviolet Calibration for the Swift/UVOT [PDF]

, 2011
We present an updated calibration of the Swift/UVOT broadband ultraviolet (uvw1, uvm2, and uvw2) filters. The new calibration accounts for the ~1% per year decline in the UVOT sensitivity observed in all filters, and makes use of additional calibration sources with a wider range of colours and with HST spectrophotometry.
Breeveld, A. A., Holland, S. T., Kuin, N. P. M., Landsman, W., Page, M. J., Roming, P.   +5 more
arxiv   +3 more sources

Quantitative detection of β-glucans in Cordyceps species using a validated Congo red assay [PDF]

Scientific Reports
β-Glucan is extensively utilized in the food industry for its functional benefits, including blood glucose and lipid regulation, enhanced food texture, and a prolonged shelf life.
Haiwen Xia, Ran Zhang, Yufan Yin, Sisommay Souvanhnachit, Yingling Lu, Zihao Liu, Wenju Zhang, Hong Yu   +7 more
doaj   +2 more sources

Determination of food additive theaflavins by ultraviolet spectrophotometry

Zhongguo shipin weisheng zazhi, 2022
ObjectiveTo establish a method for the determination of food additive theaflavins by ultraviolet spectrophotometry.MethodsAfter dissolved in water， the sample solution was extracted with ethyl acetate and 2.5% sodium bicarbonate solution in turn.
ZHANG Haihong, TIAN Hongyun, BI Tingting, WANG Wente, HU Mingyan, Wang Jun   +5 more
doaj   +1 more source

Newly Simple Quantitative Determination of Montelukast Sodium by Ultraviolet-Spectrophotometry

UHD Journal of Science and Technology, 2022
Montelukast sodium is well known pharmaceutically for its action as leukotriene antagonist and reliving symptoms associated with asthma is available in the market as tablet, chewable tablet, and powder.
Dlivan Fattah Aziz, Yehia Ismail Khalil
doaj   +1 more source

Intravital microscopy datasets examining key nephron segments of transplanted decellularized kidneys

Scientific Data, 2022
Measurement(s) DNA • tissue fluorescence Technology Type(s) ultraviolet-visible spectrophotometry • intravital microscopy Sample Characteristic - Organism mouse/rat NG108-15 Sample Characteristic - Environment laboratory environment Sample Characteristic
Peter R. Corridon
doaj   +1 more source

THE EFFECT OF PH ON THE SIMULTANEOUS DETERMINATION OF SULFAMETHOXAZOLE AND TRIMETHOPRIM BY ULTRAVIOLET SPECTROPHOTOMETRY AND MULTIVARIATE CALIBRATION

Drug Analytical Research, 2017
Analytical techniques based on Ultraviolet (UV) spectrophotometry are widely used in pharmaceutical analysis, because they are simple and inexpensive. The choice of pH is critical in the development of univariate methods for pharmaceutical quantitation ...
Fabiana E.B. da Silva , Willian R.R. Almeida, Fávero R. Paula, Aline L.H. Müller, Érico M.M. Flores, Marco F Ferrão   +5 more
doaj   +9 more sources

Near-Ultraviolet Absorption Distribution of Primitive Asteroids from Spectrophotometric Surveys [PDF]

A&A 672, A189 (2023), 2023
Aims: Our objectives were first to evaluate the possibility for using the NUV absorption as diagnostics of hydrated minerals based on the recent datasets of primitive asteroids and hydrated carbonaceous chondrites, and second to investigate the reflectance spectrophotometry of the primitive asteroids in the NUV as functions of heliocentric distance and
arxiv   +1 more source

Diagnosis of Smith-Lemli-Opitz syndrome by ultraviolet spectrophotometry

Brazilian Journal of Medical and Biological Research, 2003
Smith-Lemli-Opitz syndrome (SLOS) is an autosomal recessive disorder due to an inborn error of cholesterol metabolism, characterized by congenital malformations, dysmorphism of multiple organs, mental retardation and delayed neuropsychomotor development ...
F.B. Scalco, V.M. Cruzes, R.C. Vendramini, I.L. Brunetti, D. Moretti-Ferreira   +4 more
doaj   +1 more source