23 Questions 31 Answers 0 Followers
Questions related from Haroon Rashid
Hello Dear All, I have labelled a protein with dye. Dye has excitation/emission spectra around 800 nm wavelength, i.e. NIR region. I want to check whether there is some free dye present or Not?...
03 March 2020 8,969 3 View
Dear All, I want to ask about some molar calculation of networks formed through esterification. First, I have a linear polymer chain with single pendant hydroxyl grp. Second, i have a diacid...
12 December 2018 4,891 3 View
Hi, Can somebody suggest, How much equivalent of DMAP should be used in addition to EDC for esterification?
10 October 2018 2,698 8 View
Dear All, I want to measure polymer solvent interaction parameter for a cross-linked network. Could someone please explain, How can I do it? Kind Regards
07 July 2018 2,304 9 View
Hi Guys, I am working with purification of gels, by washing with some solvents, so that, impurities get removed. But while doing that, I am getting some cracks after washing. I have fabricated...
04 April 2018 9,492 8 View
What can be the best alternative for EDC, DMAP as catalyst for carboxylates? I want to skip DMAP actually.
02 February 2018 8,125 12 View
Hi All, Could some one suggest an easy and efficient way to protect phenyl boronic acid with ethylene glycol? Kind Regards
02 February 2018 4,891 12 View
Could some one please explain double dynamic chemical crosslinking? Thank you.
01 January 2018 7,573 0 View
Hi Dear All, Boronic acids in general form complexes with cis 1,2 or cis 1,3 diols etc. If we want to protect the boronic while attaching it to any polyesters with multi hydroxyl groups. Could...
01 January 2018 8,922 6 View
Dear All, I want to graft PBA (Phenyl boronic acid) with some polymer having pendant hydroxyl groups. From Previous literature and my own observation, boronic acid forms a complex with these...
01 January 2018 6,162 2 View
Dear All, I have a question related to the swelling property of a gel. If the main polymer backbone has got hydrophobic character but the crosslinker has got hydrophilic property. Will it affect...
12 December 2017 654 6 View
Dear All, I am using EDC as catalyst with polyesters having 4 free OH groups, to form gel network, by adding a crosslinker. Problem, I am facing is, that when I add EDC.HCl, it forms a network...
12 December 2017 7,420 3 View
What can be and could looked up to be, the ideal properties of a Polymer, intended to be used in Injectables gels?
12 December 2017 3,264 4 View
Does someone have any experience with Cu-catalyzed Azide Alkyne Click Hydrogels, used for any biomedical application? After fabrication of hydrogels and removal of copper,, we do have copper...
09 September 2017 9,741 2 View
Can some share synthesis procedure for dithiol PEG?
08 August 2017 1,116 2 View
Can drug release be achieved for 24 hours and not for longer period of time with Polycaprolactone electrospinning, alone or in combination with any other polymer?as PCL is very slowly degrading...
11 November 2016 8,053 4 View
Hello, I want to dissolve PCL and PEO with chloroform and ethanol as well as chloroform & DMF solvents combination for electrospinning purposes, but after keeping it overnight some of the...
10 October 2016 5,524 2 View
I want to dissolve a PCL,PEO polymer combination in chloroform,DMF (80:20) combination. it worked fine with that but while electrospinning, i didnt experience whipping action of the jet. For that,...
10 October 2016 1,688 6 View
Can someone confirm that decrease in flow rate of the polymer solution in electrospinning results in decreased electric current and increased surface charged density?
10 October 2016 8,683 1 View
I am performing PCL/PEO polymer blend electrospinning in presence of chloroform, but I am not experiencing whipping action of the formed jet. How to tackle this?
10 October 2016 9,412 9 View
Can anyone tell about the positive & negative electrode voltage that Should it be same for both? It can vary? In b/w, Does it effect the taylor cone?
09 September 2016 8,180 0 View
Hello, Does anybody have idea about auto-fluorescence of polymers and networks? Is it normal that polymers emit fluorescence? Regards
01 January 1970 8,660 1 View
I want to conjugate protein having C-terminus with a dye having amine derivative through carboxyl-amine reaction. Does somebody has experience of doing this reaction? OR through EDC reaction...
01 January 1970 199 4 View
