The International Chemistry Olympiad was held in 2108 in Czech Republic and Slovakia. Unlike other years on the official site, there are neither the subjects, nor the list of winners and the scores. Has anybody these items?
I am currently trying to minimise the stick-slip effect in the extrusion of a mixture powders/paraffin. I know that larger Lenght/diameter ratio of the die helps in minimisation of this...
01 April 2024 2,379 0 View
Hello I need real help from you. You must publish an item in a top Journal (WoS). I used a professional English publishing service until now, but it was not enough for me. I’m looking for another...
08 February 2021 8,214 6 View
Since state owned companies are not necessarly profit based and mainly over-crowded with employees. Cash flow that they actualy have do not reflect theur potential cash flow. How to valuate state...
04 June 2019 2,331 15 View
How would you increase the wear resistance of cemented carbide tools for CFRP milling? How to improve the abrasion resistance of the WC-Co tools
14 February 2019 4,569 3 View
Do we take in consideration the electro-dynamic forces (generated by short-circuit) when we design a 27.6 kV distribution feeder? The pole line has a four circuit configuration. Conductor size...
28 February 2018 3,513 1 View
When drying in air a suspension of WC particles and isohexane, the dried cake is soft. Switching isohexane with acetone and drying in the same conditions makes the cake harder. Using water makes...
09 May 2017 7,508 4 View
I am trying to obtain a soft cake. I know for slow sedimentation rate, the cake will be hard. What could I add in water to ensure a fast sedimentation rate?
18 April 2017 5,638 7 View
I am trying to dry an aqueous solution and hard cake forms. According to theory, the cake is softer for the flocculated suspensions, so I am trying to choose a flocculant agent. What are the...
01 August 2016 7,161 3 View
I would prefer widely-used brief measures that are free to use. Thanks! Florin
11 May 2015 9,058 7 View
Hi, I'm doing a fairly simple 2D axisymmetric simulation of heat conduction through a solid media, with heat generation.Boundaries are convection with ambient free stream temperature, and a heat...
30 January 2015 7,869 7 View
I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...
08 August 2024 8,329 0 View
I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...
30 July 2024 6,420 1 View
Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...
27 July 2024 5,748 0 View
It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...
25 July 2024 8,738 0 View
I run mechanochemical reactions that involves the use of a large amount of catalyst (1:1 molar ratio to the reactant). When I try to understand the effect of amount of catalyst on the reaction, I...
23 July 2024 9,938 1 View
Hi, I am a PhD student working at Jagiellonian University, Faculty of Chemistry. My work is related to the development of new analytical methods for the quantification of short-chain fatty acids...
22 July 2024 5,492 6 View
Dear Researchers, My question is associated with the "MDCI" method in Orca. Please let me clarify my question using a simple example: Suppose we are going to perform CBS extrapolation using "!...
21 July 2024 1,632 0 View
what are the main points
10 July 2024 9,236 5 View
Hello dear colleagues and professors Please what is the recommended type of pseudopotentials for QE? ultrasoft or norm conserving?? And from where get all types of pseudos (us, nc, pbe,...
09 July 2024 9,541 5 View
Hi, Just curious to know that in chromatography, a chromatogram should be zoomed to what scale? 10 times of output , 50X or ..? Is there any regulation or general chapter which describes this?...
03 July 2024 3,119 6 View