Which thermodynamic parameters are more important to a chemical engineer or a chemist ?

03 April 2017 2,769 0 View

What does decrease in Id/Ig value in raman spectroscopy indicate for carbon based compounds ?

Hello, I have prepared carbon coated metal nanoparticles. In raman specta I found intensity ration of D and G band (Id/Ig) ratio to decrease from 0.91 to 0.95 with increase in heat treatment...

01 February 2017 5,908 6 View

Why the lattice constant decreasing with increasing annealing temperature for silver nanoparticles in range of 20-30 nm ?

Hello, I have synthesized silver nanoparticles using PVA as encapsulating and stabilizing agent. From XRD i could get 25 and 28 nm crystallite size for 400 C and 500 C annealed samples. The...

01 February 2017 7,432 3 View

Is it possible to get red shift in CeO2 absorption peak with increase in 3+ ion dopant concentration ?

Hello, I have obtained Gd doped CeO2 nanoparticles. With UV spectra I could find increase in direct band gap values from 3.6 eV to 3.8 eV. Howerver, I was expecting band gap to decrease with...

09 October 2016 9,960 4 View

What is the reason for getting reverse change in lattice parameter for gadolinium doped CeO2 heat treated at different temperature ?

Hello, I have prepared 3%, 5%, 10% gadolinium doped CeO2 (GDC) and have heat treated it at 400 C, 500 C, and 1200 C. See attached figure for peak shift. I have calculated lattice parameter for all...

09 October 2016 9,860 7 View

What does the FC-ZFC curve indicates ?

Hello, Please look at the below curve and explain what does the hump in FC-ZFC curve indicates. What if there is no hump in it. Regards,

09 October 2016 7,556 3 View

What does the peak at 919 eV in Ce3d xps spectra indicate ?

Hello everyone, Please look at the attached figure corresponding to Ce3d of gadolinium doped CeO2. I got two peaks positioned at 919.4 eV and 916.1 eV. However, for Ce4+ we get only one peak...

09 October 2016 1,813 7 View

Where shall I observe Photoluminescence (PL) peak ?

Hello, If I get UV-vis absorption peat at 340 nm for a semiconductor and if I excite the material with 290 nm wavelength, where shall I expect the PL peak in emission spectrum assuming no other...

08 September 2016 8,451 8 View

Sensitivity factor for Ce 3+ and Ce4+ ?

Hello I want to calculate the amount of Ce3+, Ce4+ and Oxygen concentration in CeO2 sample. I have peak area (after deconvolution) of all. However, I do not know the sensitivity factor which is...

08 September 2016 9,437 8 View

How do i find X,Y,Z position of atoms for La0.6Sr0.4Fe0.8Co0.2O3 ?

Hello, I want to obtain X, Y, Z position of atoms for La0.6Sr0.4Fe0.8Co0.2O3 rhombohedral structure. How can I obtain it ? Can anyone help me for it ? I have data for XRD.

03 April 2016 1,333 4 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 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

How can i resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 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

Anyone that can help with Maxquant TMT16plex which is missing?

Hi I am very new to proteomics analysis. I have got raw files from core facility running thermofisher TMT 16plex 4 hours. I cannot find on maxquant the option TMT16Plex there is only up to 11...

25 February 2021 1,675 3 View

How to properly calculate the fluid solid heat transfer between polypropylene matrix and glass fiber in a porous medium?

I'm building a cfx model of thermoplastic pultrusion process on ansys and i have a doubt on how is the proper way to set this parameter in a porous medium

24 February 2021 1,915 1 View

How to properly calculate Interfacial area density in a porous domain?which are possible value for glass fiber?

I'm doing a cfx simulation of a multiphase flow in pultrusion and i set the Interfacial Area density in the heat exchange of a porous medium in this way IAD=Total fiber lateral surface of fiber...

23 February 2021 6,043 1 View

Model Volume fraction and magnetic field applications of nanofluids in ANSYS?

Hi I am working recently on a project where I have to study how the thermal properties or heat transfer enhancement of nanofluids as the volume fraction changes, or if a magnetic field is applied...

22 February 2021 961 2 View