Aula Al Muslim

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Questions related from Aula Al Muslim

Can we normalize negative zeta potential values?

Hi, I am looking at zeta potential values generated by Omni brookhaven instrument for lipid nanoparticles with siRNA at 10mM citrate buffer at pH range from 6.9 all the way to 2.5. I noticed that...

18 December 2018 8,564 2 View

If we have unstable formulation for a cream or lotion, how can we increase the shelf life of the formulation? what can be added to enhance stability?

Say that I want to measure the rheological properties of a cream after 7 days, 24 days, and 75days at 3 temperature degrees and I noticed that the shelf life is decreasing rapidly, what can be...

13 January 2018 6,865 7 View

How do I calculate the average molecular weight of DNA?

When calculating the average molecular weight of DNA according to the charge ratio, should we multiply the average number of base pairs in the single strand or double strand with the average...

15 April 2015 1,030 11 View

What is the best method for carrying out the removal of residual ethyl acetate?

I am using a mixture of acetonitrile : ethyl acetate (1:1) to crystallize my sample and I found that getting rid of residual ethyl acetate is causing me some problems even after using the rotary...

16 September 2014 8,680 5 View

What is the best software to check nanoparticles size distribution?

Hi, I am trying to analyze a TEM image and measure the different nanoparticles clusters size, depending on an average measurement of 500nm for one of the clusters, what is the accurate way to do...

01 January 1970 1,229 3 View