How can I get freshly powdered KOH from commercially bought KOH pallets?

More Shu Er Tan's questions See All

Are there SDMs that can take in percentage data?

Hi everyone, I am wondering if anyone knows of a species distribution model that can take in percentage data (i.e. presence data with prevalence values attached to them)? The dataset I have...

18 February 2021 7,312 3 View

No title

When I research the ransomware detection with adversarial examples, I extracted the dataset from the strings based on cuckoo dynamic analysis. Those datasets are based on the count of each string....

08 February 2021 7,049 3 View

Corpus linguistics collocate indicative of diversity?

I have a question, as to whether collocations in corpus linguistics can be used to indicate diversity. I have a corpora of media news articles, and I manage to find out the frequency of my target...

19 January 2021 1,446 1 View

2SLS vs mediation?

I have been trying to understand 2 stage least squares regression, and I am having difficulty understanding how that is different from mediation analyses. It would be helpful if you could provide...

08 January 2021 7,848 3 View

What is a good reference on designing experiments to determine molecular mechanism of disease or biological process?

I need to learn techniques and strategies in planning experiments that try to figure out the molecular mechanisms. Thanks.

01 January 2021 2,525 3 View

What is the significance of Per-Patient and Per-Tooth analysis in epidemiology?

Research in prevalence usually provide results in per-tooth/object level and per-patient level. What is the significance of these two values and which is actually more important/accurate? What are...

10 December 2020 4,248 4 View

For SIADH, does it cause edema and Hypertension?

I have found two teachings from different sources. One they said about blood volume increase and therefore the patient has oedema and hypertension. But, another source says when there is high...

08 December 2020 1,278 3 View

What is the white layer on my fermented natto bean paste?

Dear all, Good day! Recently i tried to ferment my blended soya bean powder mixed with Natto bacteria culture in a Natto maker (containing some water) at around 45 degree celsius overnight....

23 November 2020 7,105 20 View

Why do I keep getting smudged and wavy bands in certain lanes of my western blots?

Hi everyone, Been doing western blots for years now, recently however, whenever I run 2 gels, one of the gels would have a few lanes that exhibit wavy or smudgy bands at around 50 kDa (see...

16 November 2020 3,759 11 View

How to calculate the volumetric flow rate of cooling water in a heat exchanger?

Base on my study, there is about 85 kw of heat will generate from a combustion of methane gas. I want to cool down the hot air by passing it through a heat exchanger. According to my previous...

15 November 2020 167 3 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

12% ledeburitic cold work tool steel, etched for revealing retained austenite, any help for clarifying?

Hello everyone. Given microstructure image belongs to a 12% ledeburitic cold work tool steel (annealed and tempered). The sample was etched with picral (100 mL ethanol and 4 g picric acid). I...

02 March 2021 4,119 3 View

Chao Feng

You can buy it from Sigma-Aldrich:http://www.sigmaaldrich.com/catalog/product/sigald/06103?lang=en®ion=US

or you can powder it inside glovebox; another choice would be put it in acetone or DCM and crash KOH pellets inside these solvents and then filtration to obtain fine powder.

Or...use a plastic bag to cover everything inside, flash the bag with argon or nitrogen, seal the bag, and you can still ground the KOH pellets. Many methods you can try...

Shiv Kumar Yadav

you can poder in humidity control area it is commercial method

Nizam M. El-Ashgar

Grind the KOH pellet in THF and after filtration keep it in dry air.