Muna Mustafa Kareem

8 Questions 21 Answers 0 Followers

Questions related from Muna Mustafa Kareem

Are PLA and PCL bioinert polymers?

I know that both polymers are biodegradable, but are they also bioinert? or are they bioactive? as some studies showed that they can deposit HCA layer on their surface upon immersion in SBF while...

24 March 2018 9,957 3 View

Why FTIR doesn't show apatite formation on my electrospun scaffold?

I've did 28 days bioactivity test on my electrospun PLA/HA scaffolds using SBF..FTIR doesn't show any changes in the spectra even though TGA, SEM, and weight loss measurements confirms apatite...

23 October 2017 5,340 3 View

How can we calculate the amount of solution required for each sample for biodegradation test?

I'm doing degradation test for electrospun PLA scaffolds using PBS..How do I calculate the amount of PBS required for each sample? can you refer to some references please?

30 August 2017 4,407 5 View

Can I dissolve Rhodamine B in chloroform/acetone mixture?

I know that Rhodamine B is slightly soluble in acetone..but is it soluble in Chloroform or chloroform/acetone mixture (2:1)?

02 May 2017 9,900 7 View

Is it normal to have a PLA residue at the end of TGA test?

HiI'm doing a TGA analysis for pure electrospun PLA, but at the end of the test, there were some residues left and the weight loss did not reach to zero (it reached to 5-7%), is that normal? or is...

24 November 2016 350 7 View

How can I measure the porosity of electrospun fibers using microscope images and ImageJ?

I have microscope images of electrospun PLA fibers (marker bars=50 um)..How can I calculate the porosity of the scaffold using ImageJ?

24 June 2016 4,575 6 View

Why did the pH of the c-SBF dropped to 1 when I prepared 4 liters at once?

HelloI've prepared 4 liters (at once) of c-SBF (simulated body fluid) according to the method described by Kokubo,,, but when I finished adding all the materials the pH was 1 instead of 7.5!I've...

28 November 2015 8,206 1 View

How often should I change SBF solution during degradation test?

I'm doing a degradation test for electrospun scaffolds (composed of polymers and bioceramics) using SBF (simulated body fluid). How often should I change the solution for my samples to keep the...

24 November 2015 3,715 13 View