Results 111 to 120 of about 456,086 (291)

The pulsating yellow supergiant V810 Centauri [PDF]

open access: yesarXiv, 1998
The F8Ia supergiant V810 Centauri is part of a long-term high-precision photometric monitoring program on long period variables started twenty years ago. Time series analysis of this unique set of 500 data points, spanning almost fifteen years in the homogeneous Geneva photometric system, is presented.
arxiv  

Synthesis of silver nanoparticles using plant extracts from Erythrina abyssinica aerial parts and assessment of their anti-bacterial and anti-oxidant activities

open access: yesResults in Chemistry, 2022
In the present study, silver nanoparticles were synthesized using Erythrina abyssinica aerial parts as both reducing and capping agents. Three extracts were obtained from the plant using methanol, acetone and water.
Netai Mukaratirwa-Muchanyereyi   +4 more
doaj  

The ultraviolet excess of quasars 3: The highly polarized quasars PKS 0736+017 and PKS 1510-089 [PDF]

open access: yes
Ultraviolet/optical/infrared spectrophotometry of the highly-polarized quasars (HPQ's) PKS 0736+017 and PKS 1510-089 is analyzed. A blazar continuum component like that in BL Lac objects (e.g.
Malkan, M. A., Moore, R. L.
core   +1 more source

Optimasi Metode Penetapan Ranitidin Dalam Plasma Manusia Secara in Vitro Dengan Metode Spektrofotometri Ultraviolet-visibel [PDF]

open access: yes, 2009
Research of determination ranitidine plasma concentration in vitro has been done. This research aimed to analysis ranitidine in human plasma in vitro with Ultraviolet-Visible spectrophotometry and to get result that optimal of analysis method in human ...
Masyitoh, N. A. (Nur)   +2 more
core  

The Angular Diameter and Fundamental Parameters of Sirius A

open access: yes, 2010
The Sydney University Stellar Interferometer (SUSI) has been used to make a new determination of the angular diameter of Sirius A. The observations were made at an effective wavelength of 694.1 nm and the new value for the limb-darkened angular diameter ...
Davis, J.   +5 more
core   +1 more source

Ultraviolet Spectrophotometry of Phenothiazine Derivatives and Analogs

open access: yesJournal of AOAC INTERNATIONAL, 1973
Abstract Ultraviolet spectral data have been tabulated for 41 phenothiazine derivatives and analogs. The general appearance of the spectra is caused by the structure of the tricyclic π-system, whereas spectral shift effects are produced by R2 substituents.
openaire   +3 more sources

Studies of hot B subdwarfs. Part 2: Energy distributions of three bright sdB/sdOB stars in the 950-5500 angstrom range [PDF]

open access: yes
Voyager ultraviolet spectrometer observations of the subdwarf B or OB stars HD 205805, UV 1758+36 and Feige 66 are presented. All three objects display the H I Layman series in absorption.
Fontaine, G.   +4 more
core   +1 more source

Detection of the polyphenolic components in[i] Ribes nigrum[/i] L.

open access: yesAnnals of Agricultural and Environmental Medicine, 2014
Background. The blackcurrant ([i]Ribes nigrum [/i]L.) is a species of native currant which contains a lot of polyphenolic antioxidants which is used medicinally and has a fundamental role in the maintenance health.
Monica BUTNARIU
doaj  

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