Is there any interaction equivalent of Cochran's Q test (like 2x3 design)?

I have data on the effectiveness of the three treatments: T1, T2 and T3 for each patient. Each variable is coded dichotomously - 0 = drug not working; 1 = drug is working. The patient could feel...

30 November 2020 1,146 14 View

Two pair of peaks of quinone/hydroquinone redox probe on GCe?

Hello, I recently stumbled upon a voltammogram of HQ/Q in 0.1M NaCl on glassy carbon electrode. I was surprised to see two pairs of peaks present on the graph. As far as I know it is a two...

29 June 2020 1,833 2 View

Non-equal variances t-test in SPSS - it's Welch or Cochran-Cox?

Can anyone help me answer the question of whether t test for unequal variances is calculated in SPSS according to Welch or Cochran-Cox correction? Test statistics are the same, they differ only...

29 May 2019 7,445 14 View

Is there any reason why one can not reduce dimensions with PCA/Alpha before putting them into SEM model?

Suppose I have three measurable variables (A, B, C on figure below) and one latent (L) in my SEM model. This one latent one is a construct/dimension consisting of 5 questions from some...

07 April 2019 905 6 View

What is precipitated in buffer solution stored in glass bottle?

Does anyone know what is precipitated in carbonate buffer solution stored in typical amber glass bottle (picture is an attachment)? The carbonate buffer in the bottle is Na2CO3/NaHCO3, pH=10.0...

06 February 2019 7,556 3 View

How many animals are required for experiment?

I want to compare 4 different methods of bladder cancer induction and I have to calculate sample size. How many animals I have to used to get appropriate statistical power?

25 November 2018 151 2 View

How to generate average contact maps from molecular dynamics?

Hi, I am looking for a way to generate a contact map between each residue of a protein during MD simulations. I.e. for each pair of residues, count the number of frames during which they form...

05 May 2018 2,023 8 View

How to get rid of a primer smear in pcr (negative control problem)?

Hello everyone My pcr was doing just fine for few months till about 3 weeks ago I started to get smears in all my samples and positive and negative controls as well. I'm preparing my reaction...

21 March 2018 2,405 7 View

How can I cryopreservate Human Hepatic Stellate Cells?

Dear all, Does anyone know or have an experience in freezing (cryopreservation) of the primary Human Hepatic Stellate Cells? How much DMSO is recommended to use? I read that cryopreservation of...

03 March 2018 9,712 2 View

Freezing atoms in gaussian - how to do it?

Hello, I'm working on a structure with about 200 atoms. It is important for me to freeze a significant part of it for the time of optimization so that the arrangement of the given atoms with each...

05 February 2018 649 7 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

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 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

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 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

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View