When the pressure leaching process of chalcopyrite is operated in low and medium temperature range 90℃~150℃, sulfur component converted to elemental sulfur, which suppresses copper. In present study, copper rate was improved by adding chloride ions surfactants during medium-temperature at 150℃. Using autoclave equipped with a 2L reactor made titanium, leach tests were conducted for 180 min usin...

Electrochemical energy storage technologies offer means to transition toward a decarbonized society and carbon neutrality by 2050. Compared conventional lithium-ion batteries, aqueous zinc-ion chemistries do not require scarce materials or toxic flammable organic-based electrolytes function, making them favorable contenders in the scenario of intensifying climate change supply chain crisis. How...

Most modern Web browsers export a rich API allowing third-party extensions to access privileged browser objects that can also be misused by attacks directed against vulnerable ones. Web browser vendors have therefore recently developed new extension frameworks aimed at better isolating extensions while still allowing access to privileged browser state. For instance Google Chrome extension archi...

Scatterometry is presented as an optical metrology technique potentially capable of determining the critical parameters of phase shifting diffraction grating test structures (sidewall profile, linewidth, and etch depth where appropriate). The technique is noncontact, rapid and nondestructive. The test grating structure is illuminated by a laser beam and the intensities in the different diffract...

Traditional user-based permission systems assign the user’s full privileges to all applications. Modern platforms are transitioning to a new model, in which each application has a different set of permissions based on its requirements. Application permissions offer several advantages over traditional user-based permissions, but these benefits rely on the assumption that applications generally r...

A step towards minimizing the environmental pollution of leather tanning , chrome shavings wastes were treated with Li2CO3 to extract technical or industrial gelatin as an added value material. Isolation and characterization obtained from chrome-tanned done. The alkali hydrolysis products obtained, showed good physical chemical properties in terms gel strength, swelling thermal stability. optim...