Results 171 to 180 of about 266,445 (225)

In Situ Geochemical and Sulfur Isotopic Composition of Pyrites from the Jiepailing Tin–Beryllium Polymetallic Deposit, Southern Hunan Province, China: Implications for Ore-Forming Processes

Minerals
The Jiepailing deposit in southern Hunan is a typical large to super-large polymetallic tin deposit enriched in beryllium and other rare metals.
Gaofeng Du, Xiang-Ying Ling, Dan Wang, Weijian Zhou, Liu Yang, You-yue Lu, Zunzun Zhang   +6 more
semanticscholar   +1 more source

Scatter or finish specifications for beryllium mirrors?

SPIE Proceedings, 1990
Scatter from beryllium mirrors often seems to be higher than expected based on mirror surface foughness data. The paper verifies the effects and shows that in addition to surface topography scatter is caused by mirror defects that are non-topographic in nature (subsurface flaws, optical contant variations across grain boundaries, etc.).
openaire   +1 more source

Solvent Extraction, Recovery, and Purification of Beryllium from Ores

Nuclear Science and Engineering, 1963
An investigation has been made of the selective solvent extraction of beryllium from sulfate liquors by means of esters of orthophosphoric acid.
R. A. Wells, D. A. Everest, A. A. North
openaire   +1 more source

The Spectrochemical Analysis of Beryllium in Ore, Air and Solutions

Applied Spectroscopy, 1954
A spectrographic method is described for the determination of beryllium oxide in. beryl ore in the range of 6–12%. The sample is mixed with iron oxide, lithium carbonate and graphite, briquetted, and excited in the A.C. spark. The amount of beryllium is determined by comparing the density of Be 3321.343 to Fe 3021.073.
Paul W. Kehres, Wm. J. Poehlman
openaire   +1 more source

Lung Clearance of 4 μm Particles Coated with Silver, Carbon, or Beryllium

Archives of Environmental Health: An International Journal, 1977
Lung clearance in rabbits during the first week after inhalation of 4-micron teflon particles tagged with chromium-51 and coated with silver, carbon, or beryllium was studied by external measurements of the radioactivity in the lungs. Ten rabbits were exposed to silver- and carbon-coated particles on two separate occasions within 3 weeks. Clearances of
P, Camner, P A, Hellström, M, Lundborg, K, Philipson   +3 more
openaire   +2 more sources

Is beryllium in metal-poor stars of galactic or cosmological origin?

Nature, 1992
Standard Big Bang nucleosynthesis predicts a very small primordial abundance of beryllium. Observations of nine very metal-poor stars indicate a beryllium abundance roughly proportional to the oxygen abundance, a trend that can be explained in terms of galactic chemical evolution.
Gerard Gilmore, Bengt Gustafsson, Bengt Edvardsson, Poul E. Nissen   +3 more
openaire   +1 more source

Comprehensive Utilization Beneficiation Process of Lithium Pegmatite Ore: A Pilot-Scale Study

Minerals
Pegmatite ores, the primary and technologically advanced lithium (Li)-bearing minerals, comprise various rare metal-based elements, including niobium (Nb), tantalum (Ta), tin (Sn), and beryllium.
Yanbo Xu, Wei Deng, Yinjie Wang, Bing Deng, Jing Wang, Bing-ming Xu   +5 more
semanticscholar   +1 more source

Release of beryllium from mineral ores in artificial lung and skin surface fluids

Environmental Geochemistry and Health, 2011
Exposure to some manufactured beryllium compounds via skin contact or inhalation can cause sensitization. A portion of sensitized persons who inhale beryllium may develop chronic beryllium disease (CBD). Little is understood about exposures to naturally occurring beryllium minerals.
Matthew G, Duling, Aleksandr B, Stefaniak, Robert B, Lawrence, Steve J, Chipera, M Abbas, Virji   +4 more
openaire   +2 more sources

Revealing speciation transformation and stabilization mechanisms of associated trace hazardous beryllium and thallium during lithium extraction: Achieving targeted detoxification of lithium slag.

Journal of Hazardous Materials
The rapid expansion of the lithium battery industry has spurred a surge in lithium (Li) demand, with nearly half of the global supply sourced from lithium ore.
Shuping Cheng, Yong-Hong Lin, Yanxi Zeng, Guobiao Li, J. Zou, Zhihan Zhang, Zhi Wang, Tao Qi, Huiquan Li, Wanhai Xiao, Tinggang Li, Dong Wang   +11 more
semanticscholar   +1 more source

Ductility of Cross-Rolled Beryllium Sheet - Barrier or Challenge

SAE Technical Paper Series, 1966
<div class="htmlview paragraph">Production techniques required for the severe forming of commercially available cross-rolled beryllium sheet are described. Configurations prepared with these techniques include straight bends, curved channels, hemispherical segments, and semicylinders with spherical ends.
openaire   +1 more source