Gold Leaf History, Making Process and Related Techniques

Gold Process Mineralogy: Objectives, Techniques, and Applications

The extractive metallurgy of gold is largely driven by mineralogical factors such as gold particle size; association with other minerals; coatings; presence of cyanicides, oxygen consumers, and preg-robbers; presence of refractory gold minerals; locking of submicroscopic gold in sulfide and sulfarsenide mineral structures. Gold process mineralogy address all issues related to gold ore processin...

COVID-19; History, Taxonomy, and Diagnostic Molecular and Immunological Techniques

In recent years, viral epidemics such as the coronavirus disease (COVID-19) have spread, and this outbreak is thought to be the result of animal-to-human transmission. Hence, accurate diagnostic tests to detect COVID-19 and antiviral antibodies in infected individuals are of utmost importance. This report describes the structure, history, taxonomy, and molecular and immunological techniques for...

amending of constitution ;history,necessities and process of formation to making law

although the subject of amending was reffered to in the draft constitution ,but due to revolution time circumstances,this principle was not approved.ten years of islamic state (1358 – 68 ) revealed some problems of the constitution like multiple decision making centers and existence of parallel organisations at administrative, legislative and judicial levels. after the war and considering appro...

Water stress of sugarbeet as related to leaf and canopy temperatures and to leaf Water content

The shape of Au8: gold leaf or gold nugget?

The size at which nonplanar isomers of neutral, pristine gold nanoclusters become energetically favored over planar ones is still debated amongst theoreticians and experimentalists. Spectroscopy confirms planarity is preferred at sizes up to Au7, however, starting with Au8, the uncertainty remains for larger nanoclusters. Au8 computational studies have had different outcomes: the planar D4h "cl...