Can I use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography?

Hi! I would want to know if I can use acetic acid with an ELITE WAX Perkin Elmer column for Gas Chromatography. This column has a polyethylene glycol phase, but I can't find the manual to check...

22 February 2021 730 2 View

How to dissolve cross-linked Amberlite IRC120 H, hydrogen form resin?

Hello all, I have used Amberlite IRC120 H, hydrogen form acidic cation-exchange resin for the ion-exchange of waterglass [sodium silicate solution -- 40% Sodium silicate (mol ratio > 3.2)...

21 February 2021 5,614 3 View

Simulation or Experiment? How do we choose?

If we want to assess if a phenomenon is going in a direction we expect, we can simulate it, using digital models, possibly agent models factoring in known properties and interaction features. We...

12 February 2021 1,141 21 View

Matrix based scientific data analysis: extrapolating to matrices of sets?

Data sets, when structured, can be put in vector form (v(1)...v(n)), adding time dependency it's v(i, t) for i=1...n and t=1...T. Then we have a matrix of terms v(i, j)... Matrices are important,...

30 January 2021 9,295 6 View

In order to simulate a DWC in steady state, how to put the unit operations in the flowsheet of any process simulator?

14 January 2021 3,938 6 View

How to calculate the gas composition for a heat treatment where a very low oxygen partial pressure is needed?

I'm interested in a selective oxidation in an austenitic stainess steel so that Chromia rather then ferrous oxide is formed on top of my metal. I know I should have a value of pO2 around...

16 December 2020 8,541 7 View

Which is the best bibliography to search for experimental data of process engineering?

16 December 2020 7,894 2 View

The loss of hyperbolicity in PDE?

Question about the loss of hyperbolicity in nonlinear PDE: when complex eigenvalues appear, what is the effect on flow? I understand that we do not have general results on existence in this case,...

16 December 2020 2,571 3 View

How to resolve the sample contamination issue in transmission electron microscopy (TEM) even after long-time plasma cleaning?

Hi, I am doing TEM routinely in my daily research work. Most of my TEM samples are the inorganic oxide-metal nanocomposite films deposited on single crystal oxide substrate (such as STO, MgO)....

11 December 2020 2,695 5 View

How to set Decouplers in control systems?

09 December 2020 1,409 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View