Farzad Seidi

10 Questions 21 Answers 0 Followers

Questions related from Farzad Seidi

Why the LCST of hydrophobically modified PDMAEMA is higher than homo-PDMAEMA!!!??

Hi everyone, I prepared some new copolymers of Poly(N,N-Dimethylamino-2-Ethyl Methacrylate) (PDMAEMA) via its graft copolymerization to hydrophobically modified polymers via ATRP. When I took the...

18 September 2015 9,295 3 View

What is the best way to analyse snake venom?

Hello, I have about 1 mL of snake venom. what is the best suggestion for analysis of its ingredients?

09 June 2015 7,413 12 View

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...

31 May 2015 2,738 17 View

How can I measure chitosan antibacterial activity?

Hello every one,As you know, there are many reports about the antibacterial properties of chitosan and its quaternary derivatives. We prepared a new quaternary derivative of chitosan and tried to...

03 February 2015 5,003 7 View

Can anyone help with Keratin dissolution?

Hi everybody. I have a problem with keratin dissolution. I know that thiols are good reducing agents for disulfide bonds, and so these compounds can dissolve keratin in water. But I want to...

20 July 2014 6,995 2 View

How can I get a high vacuum (0.01-0.001 mbar)?

I want to get a high vacuum (0.01-0.001 mbar) by connecting two or more vacuum pumps. But I'm not sure about the know-how of this technology (parallel or serial concetion system? which of them is...

21 May 2014 8,360 8 View

What is the best condition to take a CNMR of a polysacchride derivative?

I mean what is the best temperature and how many scans are needed to take a acceptable spectrum?

03 January 2014 4,682 6 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...

26 November 2013 432 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?

20 November 2013 4,229 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...

17 October 2013 1,306 5 View