In transmission spectra, the basic reason behind the red shift of doped manganese doped MgAl2O4 samples?

Manganese was doped upto 1% in MgAl2O4 spinel. As doping concentration increase,I found a gradual red shift in the transmission spectra. what is the basic cause of red shift?

06 July 2019 2,791 3 View

When doping is less than 5%.How XRD patterns confirm doping concentration is increasing ? How to cofirm doping is interstitial or substitutional?

I have done XRD of my sample Mn doped MgAl2O4. Doping concentration was very low ( less than 5%). Now how XRD pattern will detect the doping ratio whether it is decreasing or increasing, as there...

08 September 2018 8,244 8 View

How n why water molecules are present still at 710 or 900 C ,as we see water molecules viberations in FTIR ?

when we heat up sample power or gel up-to (710-900) degree Celsius, results performed by FTIR, result shows water molecules vibrations v(O-H) and sigma(OH) etc. this is very surprising for me. why...

31 December 2017 646 3 View

What is the main difference between FTIR and Absorption spectroscopy?

what is the basic principle on which we use, to identify the crystal/powder's chemical properties or existence/doping of specific metal? and how to differentiate between both spectroscopies?

31 December 2017 1,789 7 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Can we block unwanted images during the x-ray prediction?

i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).

03 March 2021 7,100 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

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 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

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

Does anyone know to clarify these changes?

01 March 2021 1,290 2 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View