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

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 measure the thermal conductivity of polymeric viscus liquids?

How to measure the thermal conductivity of polymeric viscus liquids?

05 June 2016 9,757 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

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Sutter electrode holder leaking after applying positive pressure. How to fix?

I am using a Sutter electrode holder for my patch clamp experiments, but I'm having trouble keeping positive pressure inside my electrode due to a leak out of the back of the holder. I have added...

02 March 2021 5,829 1 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 View

Exit velocity of natural gas from pressurized tank?

Hi Guys. I'm a mechanical engineer and have a bit trouble, would be very glad if you could help me with my questions. I have a pressurized tank which contains Natural Gas at 200 Bar and 293...

26 February 2021 6,253 3 View

CGA 300 Regulator for CO2 cylinder?

Has anyone ever tried to deliver CO2 with a CGA 300 regulator? I know that a CGA 320 regulator is standard for CO2. The issue is that I currently do not have any free CGA 320 regulators. I also...

25 February 2021 3,292 3 View