Why does pH of DI water read alkaline?

I am trying to get pH of DI suspension, but prior to the suspension I am measuring the pH of DI water for comparison. My measurement is with SPER scientific benchtop pH meter. Before my...

05 June 2019 5,339 2 View

How to make disc from biochar / activated carbon flakes?

I have some biochar and activated carbon flakes and I want to prepare discs from them. I want to keep them in their original form with very little to no changes in their chemical composition. Are...

01 February 2019 6,662 2 View

How to measure absorption spectra of activated carbon?

I have an activated carbon sample for which I want to measure absorption and transmission, reflection spectra from UV-VIs-NIR spectrometer in the solar spectrum. The equipment has cuvettes for...

31 December 2018 9,962 11 View

I am looking for a simultaneous heat and mass transfer model with finite differences?

I am trying to come up with a code for simultaneous heat and mass transfer for water evaporation owing to solar flux. The incoming heat flux contributes to volumetric heat generation within a...

09 October 2018 4,839 1 View

How to calculate reflected wavelength of incident solar radiation?

Greetings. The incident solar spectrum usually has the highest irradiation in the visible range. However I am interested in using particles, which show high absorptivity in the IR range...

07 August 2018 2,724 5 View

COMSOL, Phase change : How to couple heat transfer and fluid flow?

Hello, I am trying to solve a phase change problem. With the specified heat conditions (a heat flux and convection), the phase change material melts, and convection also starts to take effect. I...

02 March 2018 8,688 3 View

Discrete Phase model (DPM) particle break-up has particle size limits during particle tracking?

Hello, I am currently working on simulating water droplet partciles in a closed room. When I use uniform particles, without "particle break-up", I can carry out the simulation without any problem....

02 March 2021 3,053 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

No title

01 March 2021 3,905 5 View

What test should I use to compare two or three means, if data is not normally distributed but sample size is > 30 in each group?

I personally feel this as a most confusing question. As per my understanding, if sample size is > 30, and sample is skewed, we can still use paramteric approach, as it will follow Z...

01 March 2021 1,587 6 View

Is it necessary to report effect size (ES) in statistics of biomedical research given that we already report p values routinely?

Pls share your thoughts

01 March 2021 7,330 4 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

Zno nano particles colour changed from white to grey in process of calcination any suggestions?

In the formation of Zno nano particles process, after drying at 120 degree C, my zno nano particles are completely white but when i calcine it for 450 degree C it converts into grey colour. i...

26 February 2021 2,435 4 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

How to calculate Z (the number of molecules in a unit cell) for calculating theoretical density?

I am trying to calculate the theoretical density of my ceramics materials. I use the formula below to calculate the theoretical density: Theoretical density = (Molecular weight x No. of molecules...

24 February 2021 3,823 2 View