Results 41 to 50 of about 17,862 (264)

High pressure and temperatures during the early stages of tungsten deposition at Panasqueira revealed by fluid inclusions in topaz

Ore Geology Reviews, 2020
The Variscan vein-type Panasqueira W-Sn(Cu) deposit, one of the main tungsten deposits in Western Europe, has a long and complicated geological history.
M. Cathelineau, M. Boiron, C. Marignac, M. Dour, M. Dejean, Eleonora Carocci, L. Truche, F. Pinto   +7 more
semanticscholar   +1 more source

The Crystal Structure of Topaz [PDF]

Proceedings of the National Academy of Sciences, 1928
An investigation of the orthorhombic crystal topaz, Al2SiO4F2, with x-rays has been reported by Leonhardt. With the aid of data from Laue and rotation photographs he found for the edges of the unit of structure, containing 4Al2SiO4F2, the values d100 = 4.64 A, d010 = 8.78 A, and d001 = 8.37 A, and determined the space-group of the crystal to be V16h. A
openaire   +2 more sources

First finding of Icelandic tephra in Czechia: Vedde Ash identified in palaeolake sediments of Stará Jímka

Journal of Quaternary Science, EarlyView.
ABSTRACT In this study, we report the first documented occurrence of the Icelandic Vedde Ash (VA) in the Bohemian Forest, identified within palaeolake sediments from Stará Jímka, Czechia, representing the first Icelandic tephra layer identified in Czechia.
Verena Meier, Simon A. Larsson, Martin Racek, Daniel Vondrák   +3 more
wiley   +1 more source

Study on Positive Temperature Effect of Moderator in TOPAZ-Ⅱ Reactor

Yuanzineng kexue jishu, 2023
TOPAZ-Ⅱ space nuclear reactor power supply adopts thermionic static thermoelectric conversion mode, the output power of the system is 5 kW, and its service life can reach 3 years. It is one of the most advanced space nuclear power supply systems that can
SHI Yunda;SUN Zheng;YANG Rui;HU Binhe;AN Weijian;ZHAO Shouzhi
doaj  

Long-term efficacy, safety, and patient-reported outcomes of apitegromab in patients with spinal muscular atrophy: results from the 36-month TOPAZ study

Frontiers in Neurology
Background and purpose At 12 months in the phase 2 TOPAZ study, treatment with apitegromab was associated with both an improved motor function in patients with Type 2 or 3 spinal muscular atrophy (SMA) and with a favorable safety profile. This manuscript
Thomas O. Crawford, John W. Day, D. De Vivo, Jena M Krueger, E. Mercuri, A. Nascimento, A. Pasternak, E. Mazzone, Tina Duong, Guo-Chen Song, J. Marantz, S. Baver, Dong Yu, Lan Liu, Basil T. Darras   +14 more
semanticscholar   +1 more source

Comparative Raman Spectroscopic Analysis of Slavíkite From Its Type Locality and Other Occurrences

Journal of Raman Spectroscopy, EarlyView.
Comparative Raman spectroscopy of slavíkite from three localities shows consistent spectral features across samples collected over several decades, reveals strong orientation‐dependent scattering effects, and provides insights into thermal stability, dehydration processes, and high‐temperature phase transformations.
Filip Košek, Jan Mráček, Vladimír Žáček, František Laufek, Radek Škoda, Ivan Němec   +5 more
wiley   +1 more source

nsf-lrose/lrose-topaz: lrose-topaz-20220222

, 2022
Highlights OSX support - homebrew installs tested on BigSur and Monterey. Packages are available for Centos, Ubuntu, Fedora 32, 33, 34, Alma Linux, Suse. RadxConvert now supports reading OU Raxpol files. The cmake-based build option is available.
Michael M. Bell
core   +1 more source

Does single-shade technology impact the long-term mechanical and optical performance of resin composites?

Materials Research Express
In this in vitro study, the mechanical and optical properties of a conventional multi-shade resin composite, Charisma Topaz, were compared with a single-shade resin composite, Charisma Topaz ONE, over a period of 12 months.
Ahmed Alshawi, Benin Dikmen, Sevda Ozel Yildiz, Ugur Erdemir   +3 more
doaj   +1 more source

A Cycle of Poems by Toyo Suyemoto, from Trek

Journal of Transnational American Studies, 2022
Cycle of poems includes "Gain," "In Topaz," "Transplanting," "Promise," and "Retrospect."
Toyo Suyemoto
doaj   +1 more source

Characterization of cocoa butter diversity in Theobroma cacao L. in Trinidad.: implications for genetic improvement and chocolate quality

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Cocoa butter, the lipid fraction of Theobroma cacao L. seeds, is essential for chocolate quality and functionality, yet the full extent of natural variation in cocoa butter traits across cacao genetic diversity remains poorly characterized.
Evelyn Kulesza, Helene Hopfer, Gregory R. Ziegler, Pathmanathan Umaharan, Mark J. Guiltinan, Siela N. Maximova   +5 more
wiley   +1 more source