Results 1 to 10 of about 454,963 (290)
Simultaneous determination of moxifloxacin and cefixime by first and ratio first derivative ultraviolet spectrophotometry [PDF]
Chemistry Central Journal, 2012 Background The new combination of moxifloxacin HCl and cefixime trihydrate is approved for the treatment of lower respiratory tract infections in adults.
Attimarad Mahesh +5 more
doaj +5 more sources
Simultaneous estimation of metformin and pioglitazone by ultraviolet spectrophotometry.
Indian J Pharm Sci, 2010 This work deals with the simultaneous estimation of metformin hydrochloride and pioglitazone hydrochloride in a bilayered tablet dosage form, without prior separation by two techniques. The methods employed are derivative spectrophotometery and Q analysis.
Goswami L, Mukhopadhyay S, Durgapal S.
europepmc +6 more sources
Ultraviolet Spectrophotometry of Lignin Revisited: Exploring Solvents with Low Harmfulness, Lignin Purity, Hansen Solubility Parameter, and Determination of Phenolic Hydroxyl Groups. [PDF]
ACS Omega, 2022 In this article, we explored solvents with lower harmfulness than established systems for UV spectrophotometry of lignin. By measuring the absorptivity in DMSO solvent at 280 nm, the purity of the lignin samples was addressed and compared with Klason and
Ruwoldt J, Tanase-Opedal M, Syverud K.
europepmc +2 more sources
Multivariate Analysis of Perfumes by Ultraviolet Spectrophotometry
Journal of the Brazilian Chemical Society, 2015 An efficient, fast and cost-effective method for detecting adulteration in perfumes by UV spectroscopy and multivariate analysis is proposed. Classification of perfumes, either as original or fake, was accomplished with the spectroscopic data using chemometric techniques such as principal component analysis (PCA), soft independent modeling of class ...
Clêrton L. Gomes +5 more
semanticscholar +6 more sources
Dimetridazole in Feeds by Ultraviolet Spectrophotometry [PDF]
Journal of AOAC INTERNATIONAL, 1965 Abstract Dimetridazole absorbs strongly in the ultraviolet region of tbe spectrum. This property was vised to develop an analytical procedure for the drvig in feeds. In the procedure, a portion of feed is extracted in hot methanol, chromatographcd in methanol and in aqvieous solutions on alumina to remove interferences, and read on an ...
Athanasios C. Daftsios
openalex +3 more sources
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 +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 +19 more
arxiv +3 more sources
Quantitative Ultraviolet Vapor Spectrophotometry [PDF]
Applied Spectroscopy, 1957 Applications of quantitative ultraviolet vapor spectrophotometry are discussed. A micropipet-sintered disc sample introduction technique based on accurate volume measurements circumvents difficult measurement of low pressures. The method greatly facilitates determination of accurate absorption intensities and thus permits many applications of vapor ...
R. A. Friedel
openalex +3 more sources
Noise analysis for CCD-based ultraviolet and visible spectrophotometry [PDF]
Applied Optics, 2015 Full-text not yet available due to publisher embargo.We present the results of a detailed analysis of the noise behavior of two CCD spectrometers in common use, an AvaSpec-3648 CCD UV spectrometer and an Ocean Optics S2000 Vis spectrometer. Light sources
Davenport, John +3 more
core +2 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. +5 more
arxiv +3 more sources