Results 21 to 30 of about 35,179 (260)

A Study of Olmec Serpentinite: exchange, production, distribution, and consumption during the Early and Middle Formative period in Mesoamerica

Internet Archaeology, 2009
This article presents recent results of our analysis of the operative sequence of production and consumption of Olmec greenstone artefacts. It documents the multi-disciplinary approach taken to the kinds of manufacturing techniques used by the Olmecs ...
Olaf Jaime-Riverón, Dolores Tenorio Castilleros, Thomas Calligaro, Juan Carlos Cruz Ocampo   +3 more
doaj   +1 more source

Tissue Zinc Concentration in Prostate Cancer: Relationship with Prostate Specific Antigen and Gleason Score in a Cohort of Nigerian Men

Asian Pacific Journal of Cancer Biology, 2021
Introduction: Prostate cancer (PCa) is the commonest maliganacy among men of African descent. The possible role of trace elements like Zinc in its aetiogenesis and disease severity remains controversial.
Martin Igbokwe, Ayo Salako, Tajudeen Badmus, Eusebius Obiajunwa, Olalekan Olasehinde, Chiamaka Igbokwe, Rotimi David   +6 more
doaj   +1 more source

Combination of particle-induced X-ray emission (PIXE) spectrometry and proton-induced gamma-ray emission (PIGE) spectrometry for analysis of azure color in tile [PDF]

مجله علوم و فنون هسته‌ای, 2015
Ion beam analysis (IBA) has been widely used for fast, sensitive, multi-elemental and nondestructive analysis without any sampling, especially for the pigment analysis.
Marjan Ghadiri, Mohammad Torkiha Esfahani   +1 more
doaj  

Demonstration of full-scale spatiotemporal diagnostics of solid-density plasmas driven by an ultra-short relativistic laser pulse using an X-ray free-electron laser [PDF]

Matter and Radiation at Extremes
Understanding the complex plasma dynamics in ultra-intense relativistic laser–solid interactions is of fundamental importance for applications of laser–plasma-based particle accelerators, the creation of high-energy-density matter, understanding ...
Lingen Huang, Michal Šmíd, Long Yang, Oliver Humphries, Johannes Hagemann, Thea Engler, Xiayun Pan, Yangzhe Cui, Thomas Kluge, Ritz Aguilar, Carsten Baehtz, Erik Brambrink, Engin Eren, Katerina Falk, Alejandro Laso Garcia, Sebastian Göde, Christian Gutt, Mohamed Hassan, Philipp Heuser, Hauke Höppner, Michaela Kozlova, Wei Lu, Josefine Metzkes-Ng, Masruri Masruri, Mikhail Mishchenko, Motoaki Nakatsutsumi, Masato Ota, Özgül Öztürk, Alexander Pelka, Irene Prencipe, Thomas R. Preston, Lisa Randolph, Martin Rehwald, Hans-Peter Schlenvoigt, Ulrich Schramm, Jan-Patrick Schwinkendorf, Sebastian Starke, Radka Štefaníková, Erik Thiessenhusen, Monika Toncian, Toma Toncian, Jan Vorberger, Ulf Zastrau, Karl Zeil, Thomas E. Cowan   +44 more
doaj   +1 more source

Ionic Surfactant Enhancement of Clay Properties for Heavy Metals Adsorption: Kinetics and Isotherms

Indonesian Journal of Chemistry, 2021
The global health problems arising from ingesting toxic metals necessitate the quest for developing efficient materials for their remediation. Surface properties of raw kaolinite clay collected from Ire-Ekiti, South-western Nigeria, were improved by ...
Adekeye Damilola Kayode, Asaolu Samuel Sunday, Adefemi Samuel Oluyemi, Ibigbami Olayinka Abidemi, Akinsola Abiodun Folasade, Awoniyi Marcus Gbolahan, Popoola Olugbenga Kayode   +6 more
doaj   +1 more source

Effect of terahertz irradiation on DNA damage repair in living cells

FEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno, Shota Yamazaki, Hiromichi Hoshina, Masahiko Harata   +3 more
wiley   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

Application of Nuclear Microprobes towards Understanding Complex Ore Geo-electrochemistry

EPJ Web of Conferences, 2012
We report on recent development on the CSIRO Nuclear Microprobe (NMP) towards catering for long exposure mapping required for large area scanning. A new data collection system based on Labview FPGA highly co-ordinated with beam transport sits at the ...
Szymanski R., Large R., Ryan C.G., Laird J.S.   +3 more
doaj   +1 more source

Enhancing Strength and Electrical Conductivity in Al–Zr–Sc Conductor Alloys Through Sn and Sr Microalloying and Two‐Step Aging Treatment

Advanced Engineering Materials, EarlyView.
Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao, Emad M. Elgallad, Alexandre Maltais, X.‐Grant Chen   +3 more
wiley   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source