Farzad Seidi

7 Questions 20 Answers 0 Followers

Questions related from Farzad Seidi

Why is there no peak for H of OH groups in polysaccharide derivative H-NMR in DMSO-d6?

Hello every one, I have an important question about H-NMR of polysacchride derivatives. I synthesize derivatives of polysacchrides with various functional groups such as OH (hydroxyl), NH2...

05 May 2015 2,547 18 View

How can I calculate the wall thickness for a vacuum distillation system?

Hi everybody,I want to design two industrial vacuum distillation systems.The dimension of my distillation tanks are as follow: (1) A Horizontal Cylinder Tank with 200 cm length and 200cm diameter...

02 February 2015 8,802 10 View

Polyethylene glycol isocyanate preparation by curtius rearrangment?

How can I convert the monomethyl-PEG-COOH (M.W 500 dalton) to its isocyanate derivative? I think using of curtius rearrangement is possible, but I couldn't find any references for this conversion...

11 November 2013 7,852 0 View

How to prepare galacturonic acid oligomer?

I want to prepare galacturonic acid oligomers with 5-8 repeating units. How should I do this? Is it possible to prepare it from pectin hydrolysis? How?

11 November 2013 9,725 5 View

Chitosan crosslinking?

I'm trying to prepare some chitosan nanoparticles. Is it possible to make chitosan nanoparticles using glutaraldehyde as a crosslinker? How? And what is the form of nanoparticles (flake or...

10 October 2013 762 5 View

What are the best conditions for making nanogels?

I want to make some nanogels and I have some questions: 1. What is the best method for making nanogels? 2. Is it possible to make a nanogel using a water soluble polysaccharide (such as chitosan...

10 October 2013 7,983 5 View

Nitrie or amide reduction to amines?

I'm going to prepare a polyamine from polyacrylamide or polyacrylonitrile. I want to know if the Clemmensen reduction is a good way to convert the nitrile or amide groups into the amines? Does...

10 October 2013 7,585 5 View