Results 41 to 50 of about 1,426,687 (380)

A Statistical Study of the Si IV Resonance Line Parameters in 19 Be Stars

open access: yesOpen Astronomy, 2011
Using the GR model, we analyze the ultraviolet Si IV resonance lines in the spectra of 19 Be stars of different spectral subtypes, in order to detect the presence of absorption components and to analyze their characteristics.
Antoniou A.   +4 more
doaj   +1 more source

Chemical and Biological Properties of Quinochalcone C-Glycosides from the Florets of Carthamus tinctorius

open access: yesMolecules, 2013
Quinochalcone C-glycosides are regarded as characteristic components that have only been isolated from the florets of Carthamus tinctorius. Recently, quinochalcone C-glycosides were found to have multiple pharmacological activities, which has attracted ...
Shijun Yue   +3 more
doaj   +1 more source

The IACOB project. V. Spectroscopic parameters of the O-type stars in the modern grid of standards for spectral classification [PDF]

open access: yes, 2018
The IACOB and OWN surveys are two ambitious complementary observational projects which have made available a large multi-epoch spectroscopic database of optical high resolution spectra of Galactic massive O-type stars. As a first step in the study of the
Apellániz, J. Maíz   +9 more
core   +3 more sources

The Spectroscope and the Weather [PDF]

open access: yesNature, 1875
WE were visited here, on the 11th inst., by a very severe thunderstorm, beginning a little before noon and lasting for about an hour and a half. Anxious to confirm some observations made recently in the West Indies, in which I got from lightning a continuous spectrum, I took out my pocket spectroscope, and on looking through it was at once struck by ...
openaire   +1 more source

Threshold Effects in Multi-channel Coupling and Spectroscopic Factors in Exotic Nuclei [PDF]

open access: yes, 2007
In the threshold region, the cross section and the associated overlap integral obey the Wigner threshold law that results in the Wigner-cusp phenomenon. Due to flux conservation, a cusp anomaly in one channel manifests itself in other open channels, even
A. Bohm   +13 more
core   +4 more sources

The Spectroscope in Medicine [PDF]

open access: yesThe American Journal of the Medical Sciences, 1880
n ...
openaire   +2 more sources

The clustering of galaxies in the sdss-iii baryon oscillation spectroscopic survey: Baryon acoustic oscillations in the data release 9 spectroscopic galaxy sample [PDF]

open access: yes, 2012
We present a one per cent measurement of the cosmic distance scale from the detections of the baryon acoustic oscillations in the clustering of galaxies from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part of the Sloan Digital Sky ...
L. Anderson   +64 more
semanticscholar   +1 more source

Green synthesis of nickel oxide nanoparticles using Acacia nilotica leaf extracts and investigation of their electrochemical and biological properties

open access: yesJournal of Taibah University for Science, 2023
Green synthesis of nanoparticles (NPs) has attracted the researcher's attention due to its rapid, cost-effective, sustainable and eco-friendly nature. Current studies were carried out to perform and investigate the green synthesis of NiO NPs with aqueous
Shabbir Hussain   +9 more
doaj   +1 more source

A Meteorological Spectroscope [PDF]

open access: yesNature, 1882
As a considerable amount of interest seems to have been awakened lately in meteorological spectroscopy, it may be of service to observers to call their attention to a form of pocket spectroscope specially adapted for this purpose which Mr. Adam Hilger, of 192, Tottenham Court Road, prepared for me some months ago.
openaire   +2 more sources

Spectroscopic studies of AFP, Anti AFP antibody and AFP/125I- anti AFP antibody complex. [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة, 2014
The aim of this work is to characterize spectrophotometrically the isolated Alpha fetoprotein from human colorectal tumor homogenates and the molecules of both AFP antibody and the complex of AFP/anti AFP antibody.Gel filtration technique was used to ...
Bilal Jasir Mohammed   +2 more
doaj   +1 more source

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