Results 51 to 60 of about 13,990 (163)

System of inclined thin veins extraction by strips along rising during the blasthole ore breaking in two-sided undercuts with explosive ore delivery to the decking of a raise (using monorail complexes)

Руды и металлы
The paper provides a brief description of mining operations at ore deposits that extract inclined thin veins with a low mechanization level. Because of the limited space, only portable pneumatic perforators are used in the faces, and low-performance ...
Rogizny V. F., Eliseev S. V.
doaj   +1 more source

The relationship between global stock and precious metals under Covid-19 and happiness perspectives. [PDF]

Resour Policy, 2022
Văn L, Bảo NKQ.
europepmc   +1 more source

Enhancement effect of Ni on the mechanical and thermodynamic properties of Au-xNi (x = 0.5,1.0,1.5,2.0,2.5,3.0) alloy: a first-principles study

Materials Research Express
Au-17.5Ni is a high-performance solder extensively utilized in the assembly of satellites, aircraft engines, and ceramic components, owing to its exceptional high-temperature properties. However, its inherent brittleness renders it susceptible to defects
Hua Dai, Liming Zhou, Jialin Chen, Shaowu Zhu, Haidong Niu, Hong Xu, Yan Wei, Zhentao Yuan, Xiao Wang, Haijun Wu   +9 more
doaj   +1 more source

Diagnostic features of rutile and cassiterite from heavy mineral concentrate samples, according to the IR microscopy data

Руды и металлы
Based on the study of rutile and cassiterite grains, using Fourier transform infrared microscopy, a new method for their determination in heavy mineral concentrate samples has been developed.
Khachatryan G. K., Anashkina N. E.
doaj   +1 more source

Cyanidiophyceae (Rhodophyta) Tolerance to Precious Metals: Metabolic Response to Palladium and Gold. [PDF]

Plants (Basel), 2021
Sirakov M, Palmieri M, Iovinella M, Davis SJ, Petriccione M, di Cicco MR, De Stefano M, Ciniglia C.   +7 more
europepmc   +1 more source

An Overview of Modified Chitosan Adsorbents for the Removal of Precious Metals Species from Aqueous Media. [PDF]

Molecules, 2022
Kong D, Foley SR, Wilson LD.
europepmc   +1 more source

Behavior of organic matter and gold under conditions of folding deformations

Руды и металлы
The article provides a brief overview of publications on natural organic matter (OM) and its transformation at various stages of the sedimentary rocks conversion.
Ganzha G. B., Arsentieva I. V.
doaj   +1 more source

Impact of the COVID-19 pandemic on return and risk transmission between oil and precious metals: Evidence from DCC-GARCH model. [PDF]

Resour Policy, 2022
Yıldırım DÇ, Esen Ö, Ertuğrul HM.
europepmc   +1 more source

The role of precious metals in portfolio diversification during the Covid19 pandemic: A wavelet-based quantile approach. [PDF]

Resour Policy, 2022
Alqaralleh H, Canepa A.
europepmc   +1 more source

Nonlinear examination of the 'Heat Wave' and 'Meteor Shower' effects between spot and futures markets of the precious metals. [PDF]

Empir Econ, 2022
Živkov D, Manić S, Pavkov I.
europepmc   +1 more source