In a OLS regression, how can I perform an interaction when one of the terms follows a quadratic function?

Hi everybody, One of the predictors (A) of my dependent variable clearly follows a quadratic function (A and A squared both significant). I want to see how this predictor interacts with another...

18 February 2021 4,088 7 View

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Hello, I am using Coulomb 3.3. When I try to use the option "Build input from CMT or focal mech. data" I have the next errors: Unrecognized function or variable 'deg2utm'. Error in distance2...

18 January 2021 4,487 4 View

What RNase-free solution can I use to transport fresh mice brains?

I will be having freshly isolated mice brains shipped. However, these brains will be eventually used for RNA isolation and immunofluorescence staining, so it is critical that I have them delivered...

07 October 2020 1,343 3 View

What is the recommended maximum length of listening tasks for primary school children?

I would like to know if there are studies that investigated how long primary-school children are able to concentrate on a listening task. Are there official recommendations for a maximum task length?

20 September 2020 1,934 7 View

When does speaker normalization develop in children?

I am on the research for studies that investigate speaker normalization in children. For example, I wonder whether children around the age of six years can already normalize acoustic differences...

16 September 2020 9,907 7 View

How can I prevent Ngn2 neuron-astrocyte co-cultures from peel off the coverslip?

Hello everyone, I've been co-culturing hiPSC-derived Ngn2 neurons with human fetal astrocytes, and at the time of grabbing the coverslip from the plate (24 wp) the cells peel off the coverslip. I...

03 September 2020 2,947 1 View

How can I get individual rarefaction on PAST4 (Paleontological Statistics software)?

Hi, I'm currently working with PAST 4.01 and I have my data organized on a table of 4 columns (treatments) and 45 rows (different bacteria genders) with the amount of genders found in every...

31 March 2020 1,914 1 View

Benjamini- Hochberg correction, which p value use?

We have carried out 6 repeated measures ANOVAS: 2 (group) X 4 (image categories: pleasant, unpleasant, food and neutral) for 3 physiological measures (blink, corrugator and zygomatic) and 3...

20 November 2019 3,451 3 View

Is anyone interested in evaluating the antibacterial or antifungal activities, or the toxicity of their new nanomaterials or nanoparticles?

In the Nanobiology Laboratory we are looking for international collaborators interested in evaluating the effect of the nanomaterials synthesized by them, in different model organisms, prokaryotes...

06 November 2018 1,854 7 View

What is the minimum amount of seawater necessary to obtain RNA signal?

13 September 2018 5,730 2 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

Where can I find life cycle inventory or assessment of non woven materials?

Dear network, I am looking for the LCA or LCI or at least the energy balances of the non woven fabrics process for my master project, in specific for natural fibers, yet I have found...

02 March 2021 9,662 1 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

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

How to remove DCU and HOBT from my reaction?

I am doing a acid and a chiral amino alcohol reaction using DCC and HOBT in DCM or THF? Can anyone suggest me how to remove DCU and HOBT from a reaction mixture??

28 February 2021 2,153 1 View

What is the most common number of epitopes in an multi-epitope Vaccine?

hi everyone, I'm interested in the field of vaccine design specifically multi-epitope cancer vaccines , I want to know if there is a minimum and maximum number of epitopes we could use in a...

27 February 2021 3,882 3 View

I want to performe MALDI-TOF MS for bacterial identification, I would appreciate it if anyone can tell me the matrix solution preparation protocol ?

based on what I've studied on multiple papers, for peptide and protein identification Alpha-cyano-4-hydroxycinnamic acid (CHCA) is an appropriate matrix to use, I also know that the CHCA powder...

26 February 2021 6,799 3 View

How to increase solubility of Poly acrylic acid in Dioxane solvent?

I am working with Polyacrylic acid (100.000Da) and instead of water, I need to use another solvent (dioxane) to dissolve PAA. However, because of the high molecular weight, it's quite hard to...

25 February 2021 2,225 5 View

Is anyone working on a project focused on immigrants/newcomers working in the hospitality industry and how they have been impacted by COVID?

The on-going Covid-19 pandemic has had devastating economic effects on many industries. However, few have suffered to the same extent as full-service restaurants. Numerous studies have shown that...

24 February 2021 9,496 4 View