and two samples of platinum-bearing concentrates. The precious metals were separated from the sized fractions by use of an elutriator. Grain-shape analyses were made from grain dimensions measured microscopically. Breadth and length of each grain were measured by ocular micrometer intercepts; grain ...
Micro averaging is the average of each class for error scores, while macro averaging is the global averaging of the positives and the negatives. For instance, first, the precision of classes ‘Class 1’, ‘Class 2’, and ‘Class 3’ is calculated, and then the macro-averaged or micro-...
A micro account is ideal for new traders with less than $1,000 in deposits. It is also excellent for learning how to trade Forex. Traders with automated trading solutions often test them in a micro account following intensive testing for bugs in a demo account. The lost size is equal to...
In 2021 we wrote: If a player wants to know what would be the next poker network that has what it takes to challenge the current online poker leader Pokestars, our pick would be GGPoker. Why do we believe this is the case? Launched in 2014, GGPoker has introduced many innovations to...
Product Name Micro Needle RF Fractional Machine Voltage AC110V, AC220V Treat Area Face, Arm, Body, Forehead, Leg, Bottocks Screen Display 8.4 Inch Color Touch Screen RF Frequency 3MHz RF Energy Density 15~25j/Cm2 Deep 3mm Gr...
Gold nanoparticles are the potent antimicrobial agents showing bactericidal effect against a wide variety of micro-organisms [25]. Being the most stable nanoparticles, gold nanoparticles promises to be a building block of newer technology in 21st century [19]. Because of their chemical stability and...
Visible gold-bearing laminated quartz vein (LV) ore was scanned using X-ray computed micro-tomography (XCT). Gold particle size and its distribution in the context of liberation diameter and clustering was investigated. A combined mineralogical and metallurgical test programme identified a liberation ...
Investigations have shown that bacteria of the genus Acidithiobacillus (Acidithiobacillus ferroxidans, Acidithiobacillus caldus) are catalysts for the reactions that occur, and that there are other bacteria involved in this process as well (Acidimicrobium ferrooxidans, Sulfobacillus acidophilus, Leptospirillum...
a person holding all their wealth in gold is forgoing a lot of regular yield and has seen long periods of underperformance relative to the market. That said, investing in gold through an ETF is a low-risk and relatively inexpensive way of getting exposure if you’re interested. Even physica...
Microp. and Mesop. Mat. 72, 33–42 (2004). 18. Wang, S. et al. Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts. J. Am. Chem. Soc. 135, 11849–11860 (2013). 19. Negishi, Y. & Tsukuda, T. One-pot ...