What are the main problems associated with LDPE recycling or valorization compared to other polymers such as HDPE and PET?

In most developing countries like Nigeria, low to medium-income earners consume packaged water coming from sachet water. Sachet water is made from LDPE. I am looking at each packaging holistically...

13 October 2020 5,044 3 View

Negative Lift from flow over a vane using profile inlet boundary condition?

I did an analysis in fluent for a flow over vanes with a constant inlet boundary condition (Mass flowrate). With this, I got positive lift, drag and moment. Thereafter, I perform the analysis...

23 August 2019 4,937 1 View

How do I define a non constant (velocity profile) inlet boundary condition in fluent simulation?

I am simulating flow over vanes and the air flow is from a propeller which the flow velocity varies across the length of the prop. The velocity is zero at the tip then increases to maximum at the...

09 August 2018 6,083 2 View

CFD convergence problem: My simulation monitored parameters does not converge completely. Can anyone tell me why?

In my simulation of analyzing the effect of vane deflection of air pushed by a propeller in a shroud, I set up some variables (like cd, cl, force, moment) to monitor. After running up to 10000...

20 March 2018 7,771 4 View

What is the clear distinction between cac and cmc as used interchangeably in polymer/surfactant systems?

01 January 1970 606 2 View

By which mechanism does potassium hyrdoxide works as an activator in the preparation of activated carbon?

Activated carbon is prepared from biomass using KOH as the activating agent. What is the possible reaction between KOH and the biomass?

14 February 2021 8,095 4 View

Buffer for protein solubilization after acetone/AS precipitation that is compatible with cell stimulation?

Hello! I am precipitating some proteins (with either acetone or ammonium sulphate) and I need to resuspend the protein pellet in a buffer that properly keeps the proteins soluble AND which is...

27 January 2021 6,958 4 View

How does a pH 13 buffer solution containing NaOH/KCl work?

pH 13 Buffer solution is prepared from a strong base sodium hydroxide and potassium chloride salt. However a buffer contain a weak base or weak acid with their salts. What is the purpose of the...

26 January 2021 9,154 1 View

Does anyone know the pH-differential method?

I use the water method to extract the anthocyanidin from Peristrophe bivalvis (L.) Merr leave, then dilute 20 times with 0.025M potassium chloride, pH1.0 and 0.4M sodium acetate buffer, pH4.5...

20 January 2021 8,305 4 View

How we can isolated MnO2 from solid organic product ?

The compound 1,4-dihydro pyridine oxidized in the presence of potassium permanganate and microwave. After oxidation, the organic product and manganese dioxide are formed, and the two substances...

09 January 2021 5,358 4 View

What is the Role of temperature In Hummers method for the preparation of graphene oxide?

04 January 2021 5,033 2 View

Can one eat Muriate of Potash Fertilizer?

What is edibility safety of fertilizer-grade Muriate of potash? Muriate of Potash (MOP) is essentially KCl with often red rust from iron oxides. In order to balance excess Na and deficit K...

25 December 2020 6,179 6 View

Is it safe to remove performic acid from protein via freeze drying?

I use solution of performic acid (30% hydrogen peroxide and 80% formic acid mixed 1:9) to solubilize a protein. Is it safe to separate the performic acid from the protein via freeze drying? Should...

25 November 2020 8,045 3 View

Acesulfame Potassium and Acesulfame and Conversion?

Dear to whom it may concern, Based on ChemAxon, I calculated pKa values of Acesulfame as follows: 1. pKa (Strongest Acidic): 3.02 2. pKa (Strongest Basic): -6 Because I would like to convert...

25 November 2020 4,577 3 View

Potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption refrigeration systems?

Although there are already studies in the literature but not much , the use of potassium formate/water or potassium formate+LiBr/Water are not available in the commercial sector for absorption...

16 November 2020 2,917 2 View