I have a powder copper color, but not is copper, a very fine powder and insoluble in water, in the acid does not give me blue green.Cerium may be ??
Tanks a lot
Who can give me an indication, how can I compare a physical and mechanical character with an elastomeric polyurethane resin and a sufficiently flexible thermoplastic? Thanks in advance
07 August 2017 3,910 0 View
how can i conversion CPS unite of measure to SV or mSV? Thank you in advance
05 June 2017 8,317 0 View
Who knows, except styrene monomer another solvent for polyester Resin? Thanks you
01 February 2017 7,133 0 View
Who knows a silicone resin powder which had a melting point of about 200 degrees or even less? Thanks
11 December 2016 1,642 0 View
Who knows why the Hf acid hold in a plastic bottle? thanks in advance
07 August 2016 7,413 0 View
I want to make a flexible polyurethane foam, but I find many holes in the foam, how can I delete them? And have a smooth foam? Thanks a lot
05 June 2016 1,107 7 View
To make flexible polyurethane foam, necessary to observe the mixing process? I want to know , the oxygen of the air accumulates in the mix? How is the condition of mixing? Thank you Rezvan
05 June 2016 5,104 8 View
Who can help me to find a highly volatile and even polished metal surface. Thanks
02 March 2016 7,018 0 View
Why the polyurethane foam clings to the side?Also used stabilizing! Thanks a lot
01 February 2016 6,399 3 View
What happens when I make polyurethane foam, and the foam does not remain stabl? Thank you
31 December 2015 8,147 8 View
I have a response variable called skin yellowness, which I will measure via a scored color chart, whereby 1 is pale yellow and 15 is orange. I'm not sure if this counts as an ordinal variable,...
11 August 2024 4,793 1 View
Approximate concentrations are require in compared with the WHO permissible limts
11 August 2024 2,723 1 View
I am developing a predictive model for a water supply network that involves 20 influencing points. However, I only have historical data for 10 out of these 20 points. I would like to know how to...
10 August 2024 4,005 2 View
How do interactions between the biosphere, the carbon cycle, and the water cycle impact global warming and interaction between the atmosphere and the hydrosphere?
09 August 2024 3,291 2 View
One can try to generalize the Vandermonde determinant in the following direction: Let $A$ be any symmetric $n$-order square matrix. Consider its powers' diagonal elements $(A^k)_{ii}$ and...
08 August 2024 6,690 1 View
Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.
07 August 2024 8,782 3 View
I have been getting a low plasma and no coating while doing rf sputtering of copper doped ZnS using a power of 140 watts and at pressure of 6.5x10-3 Mb.
07 August 2024 4,526 4 View
Dear readers, Thanks for your attention. I am wondering about the health economic problem of quantifying the value of interventions which a) prevent, b) improve symptom profile and c) ultimately...
05 August 2024 3,246 1 View
I have protein-membrane simulations (PDB, PSF, DCD) and have noticed that water molecules near the protein are not visible in the simulations. How can I fix this issue? Is there a way to place the...
04 August 2024 1,200 2 View
Why is nonpoint source pollution potentially more harmful and difference between point and nonpoint sources of water pollution?
01 August 2024 1,180 2 View