How define one baker unit(BU) is the amount of hydrogen peroxide catalase ?

07 February 2021 2,006 1 View

Where is the active point of VCSEL?

I am now working on the coupling between vertical-cavity surface-emission laser(VCSEL) and waveguide. However, the window design for laser emission is larger than the waist of Gaussian beam...

27 January 2021 8,318 1 View

Why does COD increase over time when external carbon sources are added in the denitrification process in waste water?

Why does COD increase over time when external carbon sources are added in the denitrification process in waste water? After 1 hour, the concentration increased from 30mg/l to 40mg/l after 20...

17 January 2021 374 9 View

Seperate of organic and inorganic phosphorus in waste water?

Is it possible to separate organic and inorganic phosphorus in wastewater with a filter?

14 January 2021 952 3 View

How to propose constitutive response functions during continuum modeling?

To develop constitutive models in continuum mechanics, one must consider kinematics, balance of momentum, balance of energy, and free-energy imbalance. Next, one must propose constitutive response...

02 January 2021 9,692 4 View

Why use STOP solution in ELISA?

At the last step for data analysis, we always use a STOP solution to stop the TMB oxidized by HRP. Why do we have to stop the reaction? Couldn't we measure the color wavelength of...

17 November 2020 5,177 3 View

How should I explain when the result of CV is good but cyclic charge-discharge is poor in a battery cell test?

I had some CV and cycling test for my battery half-cells. In the CV tests, they were reversible and performed very well. But during the rate performance and the cycling test, they ran only at a...

08 November 2020 7,978 4 View

How to change the title of an article?

Hi All, I have a problem with changing the title of an article added to my account. I have tried to change the title but the attempts always failed. I also tried to add a new one with the correct...

07 September 2020 3,901 3 View

DNA is not precipitating after incubating in ethanol overnight?

I am working on the soil microbiome of heavy metal contaminated soil. I extracted gDNA from the soil sample using the FastDNA Spin Kit and performed ethanol precipitation to clean up the salt...

01 September 2020 3,923 2 View

How to exchange the buffer of peptide ~1KD?

This is a peptide about 1KD in size. The commercially synthesized powder was reconstituted with a citrate buffer(pH 7) and the solution turns acidic, pH ~4. The assay requires a pH at 7 so some...

31 August 2020 870 6 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

Joint behaviour in Abaqus is not captured well?

I am working on roof joint and trying to simulate the behaviour in Abaqus. I am successful in running the model but the final graph does not follow the experimental curve in the negative direction...

01 March 2021 6,661 3 View

Is anyone familiar with the cyclic compressive fatigue testing (BS EN 12697 - 25) ?

I would like to get more information on the cyclic compressive fatigue testing (BS EN 12697 - 25) which is typically done for bituminous material in pavement design. Any one can advise on the...

28 February 2021 2,004 3 View

Concrete compressive strength databases?

I am looking for datasets similar to this one: http://archive.ics.uci.edu/ml/datasets/Concrete+Compressive+Strength I am looking for concretes with different types of aggregates (Recycled,...

27 February 2021 6,801 3 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 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

How to formulate Energy minimization in Molecular dynamics simulation for alloys using meam potential?

during MD simulation, the atoms are not moving as per required. The problem (as per my observation) lies in energy minimization technique. upon application of tensile strain in x or y direction,...

22 February 2021 380 5 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