How to wash activated carbon?

What is the best way to wash residual phosphoric acid out of chemically-activated carbon. In the literature, washing is mentioned, yet most don't explain how.

08 September 2019 6,316 4 View

Why does pH of phosphate buffer deviates from calculation?

According to the henderson hasselbalch equation, 50mM potassium phosphate buffer at pH 7.5 can be prepared by dissolving 41.1mMol of K2HPO4-2 and 8.9mMol of KH2PO4- in 1 L of water. However,...

07 August 2019 2,586 5 View

What's the effect of carbonate impurity on the pKa of a weak acid in titration?

Water absorbs CO2 from the atmosphere and forms H2CO3. Carbonic acid in turn dissociates because it's a weak acid. If we were to measure the pKa of another weak acid in water that contains H2CO3...

02 March 2019 1,098 3 View

How to measure lattice energy of Phenobarbital ?

What would be an accurate method to measure the enthalpy of crystallization of a crystalline powder e.g Phenobarbital. DSC was my first thought, however, the lattice energy = Hfusion+ Hvap....

09 October 2018 7,735 4 View

MD simulation package to study water structuring and solvation shells?

Hello, Is there a software package to study the effects of the structured solvation shell around solutes in aqueous solutions? I am trying to 1)quantify the loss of entropy upon addition of a...

07 August 2018 1,896 6 View

Forcefield for charcoal crystallite modelling?

Hello, I am modelling flat sheets of graphite consisting of fused aromatic rings (all carbon). Do you recommend any special forcefield for that ? I am thinking of using GAFF or CHARMm...

08 September 2016 8,672 4 View

Building a machine for molecular dynamics?

Hello, I am trying to build a server machine for molecular dynamics simulations. I will be using Tesla K20X for performing simulations (requires extensive communication between processors) and...

07 August 2016 736 3 View

Tautomer consideration in QM/MM minimisation ?

04 May 2016 6,149 1 View

Using canonical tautomers - preparing ligands for MD and docking ?

Hey, Should I generate all tautomers or just use the canonical tautomer when preparing ligands for docking with CDocker algorithm ? Since the canonical tautomer is the one that will most likely be...

03 April 2016 769 3 View

Analyze trajectory- RMSD of enzyme binding pocket- How to cluster ?

03 April 2016 9,789 3 View

Which is the most convenient manufacturing software for Additive Manufacturing?

Which tools can be used to generate machine codes for additive manufacturing?

02 March 2021 7,220 2 View

Does Napabucasin soluble in dichloromethane and in ethanol?

I need to prepare a solution of Napabucasin (inhibitor of cancer cell stemness) in dichloromethane. The drug is expensive, so maybe somebody already tried to do it. If it is soluble, what is the...

02 March 2021 9,945 3 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

Which is suitable for use with Python? MySQL or SQL Server?

Which is suitable for use with Python? MySQL or SQL Server? What is your suggestion?

01 March 2021 3,422 3 View

How to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

LEDs on Vis Light photo degradation of MB water sol via N doped TiO2 in a mini flume?

Good day to all, I have no experience with light emitting diodes. I am building a glass mini flume to demonstrate the photo degradation of Methylene Blue in water running over self cleaning...

26 February 2021 4,026 5 View

What software programs can directly simulate Additive Manufacturing Directed Energy Deposition (DED)?

I understand there are a lot of software programs that can simulate DED by going through specific modeling, simulation, and commands. For me, that was time consuming and results were not accurate....

24 February 2021 4,428 3 View