Results 191 to 200 of about 17,862 (264)

Multicentre, prospective, randomised study comparing the diagnostic yield of colon capsule endoscopy versus CT colonography in a screening population (the TOPAZ study)

Gut, 2020
Objective Colon capsule endoscopy (CCE) has shown promise for colorectal neoplasia detection compared with optical colonoscopy (OC), but has not been compared with other screening tests in average risk screening patients.
B. Cash, M. Fleisher, Steven E. Fern, E. Rajan, Robyn Haithcock, D. Kastenberg, D. Pound, Neofytos P. Papageorgiou, I. Fernández-Urién, I. Schmelkin, D. Rex   +10 more
semanticscholar   +1 more source

Thermoluminescent Properties of Topaz

Health Physics, 1978
AbstractThe possibility of using naturally occurring topaz crystals as a thermoluminescent dosimeter (TLD) was investigated. Topaz crystals are small, durable and possess thermoluminescent characteristics which compare favorably with existing commercial materials.
A L, Moss, J W, McKlveen
openaire   +2 more sources

Analysis of Thermoluminescence of Topaz

Physica Status Solidi (a), 1984
Thermoluminescence (TL) of RT (30 °C) X-irradiated topaz shows five TL peaks in the range 30 to 500 °C. Out of these, four peaks occurring at 101, 189, 238, and 336 °C can be isolated. The TL peak occurring in the region of 450 °C which is not yet reported in literature can not be isolated because of its low intensity and high black body radiation ...
R. K. Gartia, R. Singha
openaire   +1 more source

Formation of Topaz-Greisen by a Boiling Fluid: A Case Study from the Sn-W-Li Deposit, Zinnwald/Cínovec

Economic Geology
Zinnwald/Cínovec is one of the largest Li-Sn-W greisen deposits in Europe. Greisens in general are important hosts for many major ore deposits of several high-tech elements—most prominently Sn, W, and Li.
Shilei Qiao, T. John, A. Loges
semanticscholar   +1 more source

Origin and physical-chemical control of topaz crystallization in felsic igneous rocks: Contrasted effect of temperature on its OH–F substitution

, 2020
In highly evolved F-rich felsic igneous rocks, topaz Al2SiO4(F,OH)2 forms in different genetic stages: orthomagmatic, pegmatitic, transitional magmatic-hydrothermal, and hydrothermal.
Mohamed Soufi
semanticscholar   +1 more source

Topaz: Declarative and Verifiable Authoritative DNS at CDN-Scale

Conference on Applications, Technologies, Architectures, and Protocols for Computer Communication
Today, when a CDN nameserver receives a DNS query for a customer's domain, it decides which CDN IP to return based on servicelevel objectives such as managing load or maintaining performance, but also internal needs like split testing.
James Larisch, T. Thijm, Suleman Ahmad, Peter Wu, Tom Arnfeld, Marwan M. Fayed   +5 more
semanticscholar   +1 more source

From a F-rich granite to a NYF pegmatite: Magmatic-hydrothermal fluid evolution of the Kymi topaz granite stock, SE Finland

, 2020
The hydrothermal evolution of the chemically highly evolved topaz granite Kymi stock in southeastern Finland was reconstructed from fluid inclusion petrography, microthermometry, and LA-ICP-MS analysis. The Kymi stock shows a clear zonation and intrusion
G. Berni, T. Wagner, T. Fusswinkel
semanticscholar   +1 more source

Long‐term safety and efficacy results in hepatitis C virus genotype 1‒infected patients receiving ombitasvir/paritaprevir/ritonavir + dasabuvir ± ribavirin in the TOPAZ‐I and TOPAZ‐II trials

Journal of Viral Hepatitis, 2020
The 3‐DAA regimen consisting of ombitasvir/paritaprevir/ritonavir plus dasabuvir (OBV/PTV/r + DSV) ± ribavirin (RBV) has shown high sustained virologic response rates (~95%) in phase 3 clinical trials including >2300 HCV genotype 1–infected patients ...
F. Poordad, R. Castro, A. Asatryan, H. Aguilar, P. Cacoub, D. Dieterich, R. Marinho, Armando Carvalho, A. Siddique, Y. Hu, M. Charafeddine, M. Bondin, N. Khan, D. Cohen, F. Felizarta   +14 more
semanticscholar   +1 more source

Transient thermal-hydraulic analysis of thermionic space reactor TOPAZ-II with modified RELAP5

Progress in nuclear energy (New series), 2019
Nuclear power and thermionic conversion can serve as a compact, durable energy source for the space exploration and exploitation. In this paper, the modified Reactor Excursion and Leak Analysis Program5 (RELAP5) with the implement of NaK-78 eutectic ...
Si-Miao Tang, Hao-Nan Sun, Cheng-Long Wang, W. Tian, S. Qiu, G. Su, Tian-Cai Liu   +6 more
semanticscholar   +1 more source

Microstructure, properties and thermoluminescent response of sintered synthetic topaz (Al2SiO4F1.44 (OH)0.56)/Al2O3 compounds

, 2020
Because of variations in composition and the ensuing properties of mineral topaz, synthetic topaz offers to be a promising candidate for advanced applications.
S. Sinclair, M. Pech-Canul, E. Trujillo-Vázquez, M. C. Acosta-Enríquez, G. Saavedra, E. B. Acosta-Enríquez, L. A. González, J. López-Cuevas   +7 more
semanticscholar   +1 more source