Results 71 to 80 of about 266,445 (225)

Statistical Evaluation of Ammonium Hydrofluoride Process for Beryllium Extraction from Indian Beryl Ore

, 2013
Extraction of beryllium from Indian beryl ore using ammonium hydrofluoride as fluorinating agent was studied and optimized. This is process seems to be potentially promising for Indian beryl ore for extraction of beryllium.
B. Tripathi, J. Prakash, D. D. Thorat, D. Sathiyamoorthy   +3 more
semanticscholar   +1 more source

‘You Load Sixteen Tons, What Do You Get?’. The Jodłowno Hoard (Pomerania, Poland) as Evidence of Long‐Distance Contacts in the Early Iron Age

Archaeometry, Volume 68, Issue 2, Page 193-211, April 2026.
ABSTRACT This study presents multifaceted analyses of metal artefacts from the Jodłowno Hoard (Northern Poland), revealing that the metal originated from Iberian polymetallic ore deposits. Transported as raw ingots via Atlantic maritime routes, this copper was reworked locally into regionally distinctive forms.
K. Nowak, P. Gan, Z. Stos‐Gale, K. Cywa, J. Karasiński   +4 more
wiley   +1 more source

Contact Metamorphism in Southern California [PDF]

, 1954
A highly condensed introduction to "Contact metamorphism in southern California" is obviously not the place in which to indulge in semantic niceties nor to engage in terminological tussles, and thus the title is not intended to reflect a carefully ...
Campbell, Ian
core  

Geological Study Based on Multispectral and Hyperspectral Remote Sensing: A Case Study of the Mahuaping Beryllium–Tungsten Deposit Area in Shangri-La

Sustainability
This study applied Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) multispectral data and ZY1-02D hyperspectral data to map the structural distribution and hydrothermal alteration in the polymetallic ore district in southern ...
Yunfei Hu, Zhifang Zhao, Xinle Zhang, Lunxin Feng, Yang Qin, Ouyang Liu, Ziqi Huang   +6 more
semanticscholar   +1 more source

Beneficiation of Bertrandite Ores in Xinjiang

Kuangchan zonghe liyong
This is an article in the field of mineral processing engineering. The volcanic bertrandite ore used in this study was obtained from Xinjiang, China. Mineral and multi-elemental compositions were characterized to identify the disseminated grain size and ...
Huimin ZHENG, Lixia LI, Jia MA, Zhichao LIU   +3 more
doaj   +1 more source

Integrated product policy and ecological footprint of electronic products [PDF]

The ecological footprint (EF) methodology, developed by Wackemagel and Rees (1996), is already a very effective sustainability indicator for the human impact on earth.
Billett, EH, Frey, SD, Harrison, DJ
core   +1 more source

Sectrographic determination of yttrium or lanthanum in beryllium-copper alloys

BUNSEKI KAGAKU, 1963
An oxide d-c excitation method using internal standards was applied successfully for the spectrographic determination of yttrium or lanthanum in beryllium- copper alloys. A series of standards covering 0.01 to 1.0% of each element with respect to yttrium or lanthanum is prepared in nitric acid solution.
Keiji KANEKO, Shoichi GOSEKI
openaire   +2 more sources

Boron Abundances in Main Sequence B-type Stars: A Test of Rotational Depletion during Main Sequence Evolution [PDF]

, 2001
Boron abundances have been derived for seven main sequence B-type stars from HST STIS spectra around the B III 2066 A line. In two stars, boron appears to be undepleted with respect to the presumed initial abundance.
A. M. Brooks, Brown A. G. A., Brown A. G. A., D. J. Lennon, David L. Lambert, Ekberg J. O., F. P. Keenan, Fliegner J., Grebel E. K., Guthrie B. N. G., Hadrava P., Herrero A., Heynderickx D., K. A. Venn, Kilian J., Kilian J., Korotin S. A., Krzesinski J., Lennon D. J., M. Lemke, Maeder A., N. Langer, Olsen E. H., Oosterhoff P. T., Pigulski A., Schoenberner D., Telting J. H., Venn K. A., Vrancken M., Zhai M.   +29 more
core   +2 more sources

On the nature of Lithium-rich giant stars: constraints from Beryllium abundances [PDF]

, 2005
We have derived beryllium abundances for 7 Li-rich giant (A(Li) > 1.5) stars and 10 other Li-normal giants, with the aim of investigating the origin of the Lithium in the Li-rich giants.
de Laverny, P., De Medeiros, J. R., Israelian, G., Melo, C. H. F., Nascimento Jr., J. D. do, Randich, S., Santos, N. C.   +6 more
core   +4 more sources

Index to NASA Tech Briefs, January - June 1967 [PDF]

, 1967
Technological innovations for January-June 1967, abstracts and subject ...

core   +1 more source