Model specification for moderation in multilevel model with R?

I've got longitudinal data from a psychological experiment and try to model the data using R package lme4. My dependent variable y is continuous and is measured at eleven occassions. Each...

13 April 2020 6,619 4 View

How to connect hypothesis to your discussion?

Hello, The question was answered. Thank you! Kind regards

12 January 2020 1,834 2 View

Convert units of pre-exponential factor in Arrhenius equation for reaction rate?

I found several pre-exponential factors for the reaction rate of calcium carbonate crystallization. They are usually given in m^4 kg^-1 s^-1. Is there any change I can convert them to m^4 mol^-1...

08 October 2019 3,770 1 View

Is it true that light produced in the core of the sun needs a million years to reach the surface?

Atoms in the sun core are very fast moving. I read, that for this reason the light produced as a by-product of hydrogen fusion cannot pass directly to the sun surface (which would be a matter of...

19 January 2019 3,495 3 View

If we look from Earth into deep space with our telescopes beyond our galaxy, is the universe uniformly dense in all directions?

26 January 2018 2,314 5 View

Best way to clean CTFE equipment in order to avoid DNA contamination?

Dear colleagues, I received different pieces of lab equipment (mainly pestils and alike) out of CTFE and would like to reuse the same pestils without autoclaving them every time. I do not have any...

29 August 2017 4,356 2 View

What shall I do, when I conducted an exploratory factor analysis and it doesn't identify two of my constructs as separated constructs?

I conducted an explanatory factor analysis (I used different rotations and used principal component). The explanatory factor analysis wasn't able to identify two of my model's constructs as...

25 July 2017 8,445 2 View

Has anyone observed that MIN6 progressively express less GLP1R with increasing passage number?

19 October 2016 3,228 1 View

(Spatial) Working memory task in headfixed mice ?

I am investigating (spatial) working memory in mice. Due to the nature of the project the mice are head-fixed and therefore are not able to move around freely, eliminating most common tests for...

04 July 2016 2,997 2 View

What are best practices and relevant tools of sustainable financial investments (& insurance meachnisms) in rural activities and/or landscapes?

In many rural areas of "developing countries" small scale agriculturalists (farmers/fishers/herders/...) see the necessity for (financial) investments, they have the capacities (social & human...

25 June 2015 5,367 5 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

What solvent can I used for Paal Knorr reaction between 6-amino hexanoic acid and 2.5 hexanedione?

I am try to make the Paal Knorr reaction between 2.5 hexnedione and 6-amino hexanoic acid, my problem is type of solvent to use, because 6-hexaminohexanoic acid is soluble in water but I am not...

02 March 2021 4,443 2 View

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02 March 2021 3,060 3 View

Ester cleavage conditions?

Hi all, I need to cleave the ester in Ethyl 2-amino-1H-imidazole-5-carboxylate to make the carboxylic acid and retrieve the product from solution to use in downstream applications of linking to...

01 March 2021 8,766 3 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

Issues with Permeabilization during Flow Cytometry?

Hello Everyone. Currently I am working to characterize macrophages in the myocardium after ischemia-reperfusion injury in rats. Due to the low total cell number isolated from rat hearts I can...

01 March 2021 3,867 3 View

Which cell line should we use to perform biological dosimetry experiments?

We are preparing some experiments based on irradiating cells under different conditions in order to evaluate the effects in terms of DNA damage, genetic expression, etc. As our project is...

01 March 2021 3,355 3 View

Is it possible for two human neuronal cell lines to have different gene sequence for the same protein?

I am looking at the ATP1A2 (Sodium/Potassium ATPase alpha subunit 2) in two human neuronal cell lines. Expression levels of this protein seems to be almost equal when detected by one antibody....

01 March 2021 3,607 3 View

Is CD44 degraded in lysosome together with hyaluronan after CD44 mediated endocytosis of hyaluronic acid?

Also when RHAMM binds hyaluronic acid, they get internalized, will RHAMM also be degraded? Or both CD44 and RHAMM will be transferred back to the cell membrane? Asking for breast cancer cell line...

01 March 2021 8,169 2 View

Do you need the CMV enhancer before the CMV promotor for a proper function of CMV on the gene that follows?

I'm a student and I have to produce a cell line with a knockin for the NRF2 gene with GFP. I have to put a promotor in front of the GFP because the gene will be too far away from the promotor of...

28 February 2021 7,127 2 View