Dithiol PEG? - FAQS.TIPS

More Haroon Rashid's questions See All

Labeling of Protein with Dye?

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?...

02 March 2020 8,894 3 View

Crosslinking molar calculation???

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...

11 December 2018 4,804 3 View

Catalysts for Steglich Esterification?

Hi, Can somebody suggest, How much equivalent of DMAP should be used in addition to EDC for esterification?

09 October 2018 2,583 8 View

Polymer Solvent interaction parameter for a cross-linked network?

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

06 July 2018 2,088 9 View

Purification of Hydrogels?

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...

03 April 2018 9,427 8 View

Protection of Phenyl boronic acid?

Hi All, Could some one suggest an easy and efficient way to protect phenyl boronic acid with ethylene glycol? Kind Regards

01 February 2018 4,824 12 View

Alternative for EDC, DMAP as catalyst for carboxylates?

What can be the best alternative for EDC, DMAP as catalyst for carboxylates? I want to skip DMAP actually.

01 February 2018 8,057 12 View

Grafting of Phenyl Boronic Acid with Polymer having pendant hydroxyl group?

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...

31 December 2017 6,093 2 View

Double Dynamic crosslinking?

Could some one please explain double dynamic chemical crosslinking? Thank you.

31 December 2017 7,514 0 View

Boronic acid and Polyesters?

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...

31 December 2017 8,859 6 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

fatal error

16 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Buffer to disrupt platelet alpha granules for PF4 quantification?

Hello! I want to quantify by ELISA the secreted (from platelets poor plasma) and the non-secreted (from platelet lysate) PF4 before and after TRAP stimulation. I will use the ELISA from R&D...

03 March 2021 1,499 2 View

Polymer composites suddenly solidifies?

I am making polymer composite by solvent mixing method. When I am trying to add filler solution in polymer solution it quickly get solidified. How to make them then uinform? It doesn't give time...

03 March 2021 7,540 4 View

Nizar Matar

I hope that this supplementary note will help in your research project. It presents an easy procedure for the preparation of thiol-terminated poly(ethylene glycol) so it will be a dithiol with EG repeating units in between something like

HS...EG-EG-EG-EG-EG...SH with a proper number of EG so as there is an acceptable molecular weight of PEG.

http://www.rsc.org/suppdata/py/c3/c3py01474f/c3py01474f.pdf

Abdelkader BOUAZIZ

Dear all,

it is commercially available from sigma-aldrich for exemple.

http://www.sigmaaldrich.com/materials-science/material-science-products.html?TablePage=108187113

Professor J. Milton Harris has many papers and review on the end group chemistry of PEG. Regards