Results 91 to 100 of about 211,656 (309)
Kuangchan zonghe liyongThis is an article in the field of mining processing engineering. The gold grade of a low-grade, high-arsenic, high-carbon refractory gold ore in Qinghai is about 2.38 g/t, and the industrial recovery rate of gold is about 77%.
Pingtian MING +4 more
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The Gold Standard, Deflation, and Financial Crisis in the Great Depression: An International Comparison [PDF]
Recent research has provided strong circumstantial evidence for the proposition that sustained deflation -- the result of a mismanaged international gold standard -- was a major cause of the Great Depression of the 1930s.
Ben Bernanke, Harold James
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Advanced Functional Materials, EarlyView.This study reports a microfluidic device with a functionalized surface utilizing a polyoxazoline coating and covalently immobilized gold nanoparticles and anti‐phosphatidylserine antibody. The device efficiently eliminates pre‐apoptotic and apoptotic spermatozoa and yields sperm with substantially improved quality and low DNA damage, offering a simple ...
Soraya Rasi Ghaemi +5 more
wiley +1 more source
Scylla and Charybdis. The European Economy and Poland's Adherence to Gold, 1928-1936 [PDF]
This paper examines the timing of exit from the gold-exchange standard for European countries based on a panel of monthly observations 1928-1936 for two purposes: first it aims to understand the enormous variation in monetary policy choices across Europe.
Nikolaus Wolf
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Advanced Functional Materials, EarlyView.Flexible piezoresistive pressure sensors underpin wearable and soft electronics. This review links sensing physics, including contact resistance modulation, quantum tunneling and percolation, to unified materials/structure design. We highlight composite and graded architectures, interfacial/porous engineering, and microstructured 3D conductive networks
Feng Luo +2 more
wiley +1 more source
Neoarchean gold grain size and artisanal mining in Migori, Kenya: review of current recovery methods
Earth Science, Systems and SocietyArtisanal and small-scale gold mining (ASGM) in Archean greenstone provides a significant source of income for rural communities. Understanding of the particle size distribution of gold is an important parameter for its recovery as it determines the most
Clive J. Mitchell +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.A novel thermos‐responsive hydroxypropyl cellulose/graphene oxide (HPC/GO) composite membrane is fabricated for reversible temperature‐gated ion transport in aqueous zinc‐ion batteries. Enabled by LCST‐driven structural transition, unimpeded ion diffusion at room temperature delivers high capacity, while elevated temperature suppresses transport; full ...
Xueli Bi +9 more
wiley +1 more source
Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications
Advanced Functional Materials, EarlyView.Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi +3 more
wiley +1 more source
Research progress on non-cyanide leaching of refractory gold ores
工程科学学报, 2019 With the increasing demand for gold and the decreasing of easily treated gold resources, refractory gold ores, which are characterized by low gold recovery and high cyanide consumptions when subjected to direct cyanide leaching, have gradually become the
JIA Yu-juan +3 more
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International Journal of Students' Research in Technology & Management, 2016 E waste production in great amounts and its problems, which challenge the field of waste and environment management stem from the increase in the production of electronic appliances, diversity seeking consumers and perishable products. The disposal of e waste into the environment is hazardous as they contain chemicals.
Mona Al Balushi, Dinesh K Kaithari
openaire +1 more source