Results 81 to 90 of about 702,238 (308)

Economic Recovery from the Argentine Great Depression: Institutions, Expectations, and the Change of Macroeconomic Regime [PDF]

This work explores how Argentina overcame the Great Depression and asks whether active macroeconomic interventions made any contribution to the recovery.
Alan M. Taylor, Gerardo della Paolera
core  

Gold recovery from sulphide minerals:a bioprocessing approach [PDF]

, 2012
Sometimes gold recovery  from its ores represents a challenge. This is due to fine dissemination and interlocking of the gold within the associated sulfide minerals.
Ahmed, Hussin, El-Midany, Ayman
core  

What ended the great depression? Reevaluating the role of fiscal policy [PDF]

, 2011
Conventional wisdom contends that fiscal policy was of secondary importance to the economic recovery in the 1930s. The recovery is then connected to monetary policy that allowed non-sterilized gold inflows to increase the money supply.
Perry, Nathan, Vernengo, Matías
core   +2 more sources

Coordinated Multi‐Component Gradient Engineering of Catalyst Layers for Advanced Polymer Electrolyte Fuel Cells

Advanced Functional Materials, EarlyView.
This work presents a continuous linear gradient catalyst layer design, a general strategy for improving membrane electrode assemblies across electrochemical devices. Fabricated via a dual‐nozzle spray coating method, the architecture controls the Pt/carbon ratio, ionomer content and ionomer type across the catalyst layer, enhancing proton conduction ...
Shangwei Zhou, Matt P. Tudball, Yiming Guo, Bia Brandt, Adam Zucconi, Wenjia Du, Junfu Bu, Daniel H. C. Wan, Jianuo Chen, Emanuele Magliocca, Feng Ryan Wang, Alexander J.E. Rettie, Patrick S. Grant, Paul R. Shearing, Rhodri Jervis, Thomas S. Miller   +15 more
wiley   +1 more source

Roll‐to‐Roll Mechanical Exfoliation for Large‐Area van der Waals Films with Preserved Crystallographic Alignment

Advanced Functional Materials, EarlyView.
A roll‐to‐roll exfoliation method is demonstrated that preserves the crystallographic alignment of anisotropic 2D materials over large areas, enabling scalable fabrication of directional electronic and optoelectronic devices. Abstract Anisotropic 2D materials such as black phosphorus (BP), GeS or CrSBr, exhibit direction‐dependent optical and ...
Esteban Zamora‐Amo, Francisco Fernandez‐Canizares, Yigit Sozen, Thomas Pucher, Pedro L Alcázar Ruano, Carmen Munuera, Ryo Ishikawa, Naoya Shibata, María Varela, Der‐Yuh Lin, Bing Wu, Jorge Quereda, Zdenek Sofer, Gabriel Sánchez‐Santolino, Andres Castellanos‐Gomez   +14 more
wiley   +1 more source

Design and Stress Analysis of a Combined Gravity Concentration and Leaching Drum for the Small‐Scale Gold Mining Industry in Ghana

The Journal of Engineering
Gold recovery for small‐scale mining is 50%, dropping to 20% when recovering fine gold of particle size less than 100 microns. Gravity concentration of gold prior to cyanidation significantly improves the recovery of very fine gold; therefore, this ...
Edward Yin, Evans Kessie Asiedu, Enoch Quaicoe   +2 more
doaj   +1 more source

Practice and Application of Regrinding and Re-election of Swept Concentrate from a Low-grade Difficult Gold Ore in Qinghai Province

Kuangchan zonghe liyong
This 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, Fei LI, Ziqiang CHEN, Zhaohua XIONG, Mengzhong HU   +4 more
doaj   +1 more source

Enhancing gold recovery by bioleaching of chalcopyrite low grade ore [PDF]

, 2005
The conventional flotation can't provide fair results when applied to very low grade ores or to "refractory" ores. This class includes intimate and nonuniform mineral associations, with partialy oxidized minerals and high secondary mineral content and ...
Golomeov, Blagoj, Krstev, Boris
core  

Generating Cell Surface Nucleated Hydrogels with an Artificial Membrane‐Binding Transglutaminase

Advanced Functional Materials, EarlyView.
Cell‐based therapies require advanced strategies to enhance cell delivery and bioactivity. Cell membrane engineering offers an avenue to impart new functions to delivered cells to boost their viability and function. Here, an artificial membrane‐binding transglutaminase is generated and biophysically characterized.
Rosalia Cuahtecontzi Delint, Tao Li, Kapil D. Patel, Will H. Zhang, Ben M. Carter, Graham J. Day, Adam W. Perriman   +6 more
wiley   +1 more source

Recovery of Gold from Gold Plating Industry Wastewater Using an Agricultural Waste: Hard Shell of Apricot Stones [PDF]

Iranian Journal of Chemical Engineering, 2007
Activated carbons are extremely versatile adsorbents for major industrial significance, especially for metal ions recovery from wastewaters. In this study, the activated carbon prepared from the hard shell of apricot stones, an agricultural solid, which ...
doaj