How synthesis of bis structure?

I want to synthesize bis structure as mentioned in the published research pabers but I didn't success. Any precautions are recommended??

02 March 2018 3,159 10 View

Can any one help me in getting a reference for hydrolysis constant of metal catios?

31 December 2015 1,980 1 View

How Can I determine Kw ( ionic product) of water by potentiometric tritration ?

I do a potentiometric titration for ligands( like amino acids ) and ligand metal complexes to calculate dissociation constant of ligands and formation constant of it's metal complexes.

11 December 2014 838 2 View

Can anyone help me with the ESR for a copper complex?

I had done ESR analysis for copper complex and got a chart and data, how can I use those to get g and A values.

06 July 2014 3,754 2 View

How can I prepare Ferric citrate from Ferric chloride and citric acid?

I had added Fecl3 + cit. acid (1:3) + equivalent of NaHCO3 but nothing occurred.

03 April 2014 9,678 3 View

I have extracted a natural polymer, how can I know the purity of this product?

What about acetolysis products and alditol acetates?

05 June 2013 3,175 6 View

How to calculate stability constant from potentiometric titration?

I know that is easily by BEST7 program but I do not have it. what can I do?

02 March 2013 1,112 5 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