What are the analysis tests that needed to be conducted during a pilot study stage if the instruments are used for the first time in new context?

Hi dear all, Actually, I have adapted high valid instruments from previous studies that have been published in developed country and currently I want to use it for first time in other region,...

18 August 2020 4,136 11 View

Is it allowed to apply Kubelka Munk function (1-R)^2/2R to Vis diffuse reflectance spectra on a glass powder?

Reflectance spectra are performed on the plane surface of a compact glass powder disk (5 mm thickness). The glass particles can range from 20 to 100 micrometers. The instrument is a portable...

21 July 2020 4,577 2 View

What are the best materials for electrochemical CO2 reduction?

I want to know the criteria to select promising materials to srart research on electrochemical CO2 Reduction with examples from very recently studied materials.

07 December 2019 5,680 3 View

I need to do a top file or a prm file for Chlorogenic acid with an OPLSAA force field. Thus, how can I create these files?

I am trying to simulate the interaction between this acid and a protein, so I am following the steps of the protein-ligand Gromacs tutorial. However, I need a prm file to complete the complex...

27 November 2019 9,460 1 View

Increasing the sensitivity of GC?

I was calibrating GC on PAINO compound was using split mode 100:1 and 0.5 uL injection volume of diluted sample and it was more that enough for range of 0.001%(10ppm) and Higher concentration . i...

10 November 2019 2,425 1 View

What is the mobile phase that can I use for HPLC? Knowing that my starting material is Bromobenzene and the solvent is DMF?

What is the mobile phase that can I use for HPLC? Knowing that my starting material is Bromobenzene and the solvent is DMF and the expected product is carboxylic acid.

23 September 2018 2,877 3 View

Is XRD the best technique to differentiate graphitic carbon from organic carbon and carbonates?

Hello. I am interested on graphite characterization. Is XRD the best technique to differentiate graphitic carbon from organic carbon and carbonates? Which other techniques can you suggest me? Can...

31 July 2018 6,416 4 View

Transformation of an angular variable?

Which transformation should I apply to an angular variable (i.e. slope of a landslide) in order to normalize it (like arcsin to percentages)? Even though ANOVA are robust to not normal...

27 February 2017 8,585 2 View

Post hoc test for a contingency table NxN?

When I run a contingency table NxN and I get a significant result with the chi-square test, is there a post-hoc test in SPSS to address the comparisons? Or should I run logistic...

27 February 2017 2,858 1 View

What is the best method for extraction of dried purple carrots and hibiscus to give to rats?

20 April 2016 9,703 3 View

How the parameters (such as Mw, Chemical bonds, polymer bland and so on) affect the mechanic property of polymer (such as storage, loss modulus) ?

Anyone can recommend any books on such topics? Thanks in advance.

02 March 2021 8,457 2 View

Why Austenite grains in steel show much more twinning than ferrite grains?

It is oftentimes said to be a distinctive metallographic trait that differentiates a fully austenitic and a fully felly ferritic steel without etching that might distinguish between two. Why...

02 March 2021 728 2 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

How can I verify my centrifugal fan design for electric motor cooling?

I have radial blade centrifugal fan design which will be mounted on exhaust side of electric traction motor. The fan will be mounted on same motor shaft inside the housing. How can I verify that...

23 February 2021 2,390 3 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View