May I know the maximum chemical shift possible for carbon with hydroxy group?

May I know the maximum chemical shift possible for carbon with hydroxy group.. like ferrocenyl alcohals.. like and geminal alcohals.. in13C NMR. Thanking you.

09 October 2018 7,814 0 View

What is the pressure index of propellant?

Dear All, May I know what is the pressure index of propellant? how to calculate pressure index of propellant from burn rates at different pressures.. Thanking in advance fro your valuable time.

07 August 2018 5,480 1 View

Does the pH of phosphate buffer changes with temperature aging?

If I make a phosphate buffer of pH 7.2 at RT and take it to 37 degree does it changes? What about simulated body fluid (SBF)?

11 December 2017 7,062 2 View

How to calculate the molecular weight of PEG from proton NMR?

Dear All, I want to know the MW of polyethylene glycol. Please suggest me how to calculate the molecular weight from proton NMR. Thanking you.

05 June 2017 2,383 5 View

How to calculate the hydroxyl value or OH functionality of PEG from 1H NMR?

Dear all, I want to calculate the hydroxyl value or OH functionality of PEG from 1H NMR. Is it possible to calculate as end functionality as in the other oligomers..? What will be the degree of...

05 June 2017 7,220 6 View

Does aldehydes undergo nucleophilic addition or substitution reactions?

02 March 2017 1,270 15 View

How to measure the density of viscus liquids?

How to measure the density of viscus liquids? please suggest some simple method.

05 June 2016 2,361 1 View

How to update citation (from IECR in ACS) to my article (Plymer in Elsevier) in RG?

02 March 2016 4,292 2 View

What are the important factors that can be evaluated by dielectric measurements of polyurethane films?

Dear all, Thanking you in advance for your valuable time. We have prepared few PU films with controlled ferrocene loading in the order of 10-3 w/w %. We observed a little improvement in dielectric...

02 March 2016 8,746 3 View

How to file a patent and how to choose patent publishers..?

How to file a patent and how to choose patent publishers..?Suppose we have developed a binder which is better properties than existing and very easy to synthesize. Thanking you in advance for your...

01 February 2016 6,623 0 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 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

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to polymerize TEOS?

I want to polymerize TEOS on a surface. I know that NH4OH is a preferred catalyst and an alcoholic solvent should be used .But I can not find certain amounts of each material to use. Does any one...

02 March 2021 1,404 6 View

What are anisotropic electrical and optical properties of a semiconductor due to?

In some materials, properties such as band gap, thermal conductivity differ along different crystallographic axes. What are the basics?

01 March 2021 1,923 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Can polymer concentrations be calculated based on the number average molecular weight?

Hello, I spin-cast two different polymers onto wafers and measure their height as a function of initial concentration. For polymer A, I have the weight-average molecular weight (Mw) as well as...

28 February 2021 7,882 2 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

RIA. How to measure?

When you use RIA, with a control the unknown sample with antibodies, you bare in mind the binding sites of the antibodies. However you still need to measure labelled antigen (radioactive) and not...

28 February 2021 2,133 3 View