Results 1 to 10 of about 325,168 (305)

Spectrophotometry for xanthochromia [PDF]

New England Journal of Medicine, 2004
To the Editor: Xanthochromia, or a yellow appearance of the cerebrospinal fluid, is often used to confirm suspected subarachnoid hemorrhage.1,2 It is associated with the presence of bilirubin, a blood product that arises only in vivo by the enzymatic transformation of hemoglobin.
Keir, G, Petzold, A, Sharpe, LT
core   +6 more sources

Precision Spectrophotometry at the Level of 0.1% [PDF]

Astron. J. 142, 153, 2011, 2011
Accurate relative spectrophotometry is critical for many science applications. Small wavelength scale residuals in the flux calibration can significantly impact the measurements of weak emission and absorption features in the spectra. Using Sloan Digital Sky Survey data, we demonstrate that the average spectra of carefully selected red-sequence ...
Yan, Renbin
arxiv   +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, Clayton, Geoffrey C., Fitzpatrick, E. L., Gordon, Karl, Massa, Derck   +4 more
arxiv   +6 more sources

Determination of Hexavalent Chromium (Cr(VI)) Concentrations via Ion Chromatography and UV-Vis Spectrophotometry in Samples Collected from Nacogdoches Wastewater Treatment Plant, East Texas (USA) [PDF]

, 2016
The concentration of hexavalent chromium (Cr(VI)), a toxic environmental pollutant and carcinogen, was determined in samples collected from Nacogdoches Wastewater Treatment Plant (NWWTP) using ion chromatography and UV-visible spectrophotometry (IC, UV ...
Onchoke, Kefa Karimu, Sasu, Salomey A
core   +4 more sources

Comparative Analysis of Serum Magnesium Ion Levels Using Three Measurement Methods: Spectrophotometry, Atomic Absorption Spectrophotometry, and Inductively Coupled Plasma With Optical Emission Spectrophotometry. [PDF]

Int J Anal Chem
Magnesium is a cation that plays as an important cofactor in various enzymatic reactions. It is the fourth most abundant cation in the body after sodium, potassium, and calcium.
Mulya Harahap RI, Kurniati I, Suraya N, Rostini T, Ropii B, Bethasari M.   +5 more
europepmc   +2 more sources

3D Spectrophotometry of Planetary Nebulae in the Bulge of M31 [PDF]

Astrophys.J. 603 (2004) 531-547, 2003
We introduce crowded field integral field (3D) spectrophotometry as a useful technique for the study of resolved stellar populations in nearby galaxies. As a methodological test, we present a pilot study with selected extragalactic planetary nebulae (XPN) in the bulge of M31, demonstrating how 3D spectroscopy is able to improve the limited accuracy of ...
Andreas Kelz, Bacon R., Fried D. L., Goudfrooij P., Hoessel J. G., Jurgen Schmoll, Larson R. B., Martin M. Roth, Meisenheimer K., Sabbadin F., Saglia R. P., Shaver P. A., Si’lchenko O., Supper R., Thomas Becker, Walsh J. R., Walsh J. R., White S. D. M.   +17 more
arxiv   +3 more sources

NICMOS Spectrophotometry and Models for A-Stars [PDF]

, 2008
Absolute flux distributions for eight stars are well measured from 0.8-2.5mu m with NICMOS grism spectrophotometry at a resolution of R~100 and an accuracy of 1-2%. These SEDs are fit with Castelli & Kurucz model atmospheres; and the results are compared with the Cohen-Walker-Witteborn (CWW) template models for the same stars. In some cases, the T_{eff}
Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Bohlin, Castelli, Chiar, Cohen, Cohen, Cohen, De Jager, Gray, Holberg, Kurucz, Kurucz, Landolt-Börnstein, Martin Cohen, Maíz Apellániz, R. C. Bohlin, Rieke, Skrutskie   +23 more
arxiv   +3 more sources

Flame Spectrophotometry and Atomic Absorption Spectrophotometry

Nippon kagaku zassi, 1966
Chuzo Iida, Keiichirō Fuwa
openalex   +4 more sources

Quantification of glucose-6-phosphate dehydrogenase activity by spectrophotometry: A systematic review and meta-analysis

PLoS Medicine, 2020
Background The radical cure of Plasmodium vivax and P. ovale requires treatment with primaquine or tafenoquine to clear dormant liver stages. Either drug can induce haemolysis in individuals with glucose-6-phosphate dehydrogenase (G6PD) deficiency ...
Daniel A Pfeffer, B. Ley, R. Howes, Patrick Adu, M. Alam, P. Bansil, Y. Boum, Marcelo Brito, P. Charoenkwan, A. Clements, L. Cui, Zeshuai Deng, O. Egesie, F. Espino, Michael E. von Fricken, M. M. Hamid, Yongshu He, G. Henriques, W. Khan, N. Khim, Saorin Kim, M. Lacerda, Chanthap Lon, A. Mekuria, D. Ménard, W. Monteiro, F. Nosten, N. Oo, S. Pal, D. Palasuwan, S. Parikh, Ayodhia Pitaloka Pasaribu, J. Poespoprodjo, D. Price, A. Roca-Feltrer, M. Roh, D. Saunders, Michele D Spring, I. Sutanto, Kamala Ley-Thriemer, T. Weppelmann, L. von Seidlein, A. Satyagraha, G. Bancone, G. Domingo, R. Price   +45 more
semanticscholar   +1 more source

Innovative technique for analysis of wastewater contaminants using hyperspectral imaging

Journal of Spectral Imaging, 2020
Accurate, fast, quantitative on-site analysis of wastewater is an environmental necessity. Therefore, we report a quantitative spectroscopic study in order to analyse organic contaminants in wastewater. For this purpose, two spectroscopy-based techniques
Ramy Abdlaty, Mohamed Gobara, Ibrahim Naiem, Mohamed Mokhtar   +3 more
doaj   +1 more source