1. A-shares are soaring: 3900 points! But don’t rush to chase the highs. On the first day after the National Day holiday, the A-shares jumped directly to 3934 points, reaching a ten-year high! However, a closer look at the market reveals a “colorful dance”— the resource sector rose by 7.6%, with 20 stocks hitting the … Read more
Abstract The Irish mineral field contains both zinc-lead deposits and copper-nickel-arsenic deposits, but the relationship between their formation is controversial. This study focuses on the copper-nickel-arsenic ores of the Lisheen deposit, analyzing their mineral characteristics, formation sequence, and chemical composition. The research found that these copper-nickel-arsenic ores and zinc-lead ores were formed from the same … Read more
Precious metals content testing for various waste materials such as waste circuit boards, jewelry, waste liquids, gold-plated waste, catalysts, etc. is needed nationwide, including ores, mine powders, garbage, circuit boards, sludge, and precious metal catalysts (gold, silver, palladium, platinum, rhodium, ruthenium, iridium, osmium), non-ferrous metals, ferrous metals, rare earth metals, ore identification, and composition analysis.Contact … Read more
Abstract Recently, Professor David W. C. MacMillan, a 2021 Nobel Prize winner in Chemistry from Princeton University, reported a novel photonic/nickel cooperative catalysis strategy based on the double decarboxylative cross-coupling (SH2) reaction, which can be used to construct valuable C(sp3)-C(sp3) coupling products from aliphatic carboxylic acids. Detailed mechanistic studies indicate that this reaction involves an … Read more
Long-term gradual changes will lead to significant changes. With the increasing call for environmental protection, the surface treatment processes for PCBs will definitely undergo major changes in the future. The Purpose of Surface Treatment The most fundamental purpose of surface treatment is to ensure good solderability or electrical performance. Due to the tendency of copper … Read more