Results 31 to 40 of about 106,789 (300)
On the Kinetic Energy and Radiative Efficiency of Gamma-Ray Bursts [PDF]
, 2004 Using measured X-ray luminosities to 17 Gamma-Ray Bursts (GRBs) during the afterglow phase and accounting for radiative losses, we calculate the kinetic energy of these bursts and investigate its relation to other GRB properties. We then use the observed
Lloyd-Ronning, Nicole M., Zhang, Bing
core +1 more source
Determination of ruthenium on DNA by XRF [PDF]
Biological Trace Element Research, 1987 An X-ray fluorescence (XRF) technique is used to quantitate the binding of [H2O(NH3)5Ru(II)](2+) to DNA. This method is shown to be more sensitive, precise, and convenient than conventional optical absorption (OA) spectroscopy, differential pulse voltammetry (DPV), or atomic absorption (AA) techniques. X-ray fluorescence is insensitive to the oxidation
Wielopolski, L. +3 more
openaire +2 more sources
Elementary characterization of Ti metal alloys used in implant dentistry
Brazilian Journal of Radiation Sciences, 2019 The main goal of present work is analytical characterization of standard dental implants broadly used by Brazilian dentists. An ideal biological alloy for dental implants must have very high biocompatibility, which means that such material should not ...
Catarina Alzira Montenegro Peddis Torres +6 more
doaj +1 more source
Archaeological and archaeometric study of the glass finds from the ancient harbour of Classe (Ravenna- Italy): new evidence [PDF]
, 2015 Introduction: The present study focuses on Late-Roman/Early Medieval glass found in the productive area within the ancient harbour of Classe near Ravenna, one of the most important trade centres between the 5th and 8th centuries AD of the Northern ...
Enrico, Cirelli +5 more
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Multi-method (XRF, FTIR, TGA) analysis of ancient bricks from Karabalgasun : A preliminary study
Proceedings of the Mongolian Academy of Sciences, 2020 Ancient ceramic artefacts attracted the attention of scientists as being a chronological indicator within the archaeological context; however, they can also provide information about the tech-nology and provenance.
Saran Solongo +4 more
doaj +1 more source
Analysis of South America coins of the XIX and XX centuries by XRF technique
Brazilian Journal of Radiation Sciences, 2021 In this work, the elemental composition of 21 coins from nineteenth and twenty centuries of South America belonging to a private collection were performed using the X-Ray Fluorescence (XRF).
Raysa Costa Nardes
doaj +1 more source
Trabajos de Prehistoria, 2010 El artículo presenta el resultado de los análisis realizados a los metales de base cobre de la importante necrópolis siciliana de Madonna del Piano, próxima a Grammichele (Catania), fechada entre el Bronce Final 2 y la Primera Edad del Hierro IA.
Alessandra Giumlia-Mair +2 more
doaj +1 more source
Swift-UVOT Observations of the X-Ray Flash 050406
, 2006 We present Swift-UVOT data on the optical afterglow of the X-ray flash of 2005 April 6 (XRF 050406) from 88s to \sim 10^5s after the initial prompt gamma-ray emission.
A. Cucchiara +23 more
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Influence of compression on soil characterization by X ray fluorescence
Semina: Ciências Exatas e Tecnológicas, 2018 The study of soil mineralogy has been highlighted in recent years, as well as the search for alternative analytical techniques for soil analysis. The classical methods for determination of total oxides in soil expose the analyst to chemical hazards and ...
Yasmin Vieira +4 more
doaj +1 more source
Cosmological X-Ray Flashes from Off-Axis Jets [PDF]
, 2003 The of the cosmological X-ray flashes detected by WFC/BeppoSAX is calculated theoretically in a simple jet model. The total emission energy from the jet is assumed to be constant.
Ioka, Kunihito +2 more
core +3 more sources