Hi, does anyone know how much it costs to assay cortisol (saliva) at salimetrics? say i have 1000 samples?

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How can I get full access to the following manuscript published recently?

Xie, Liyang, Wei Xu, and Yi Zhou. 2021. “Spillover Effects of Adult Children’s Schooling on Parents’ Smoking Cessation: Evidence from China’s Compulsory Schooling Reform.” Journal of Epidemiology...

23 August 2021 1,836 4 View

How to compute power analysis for slope/association differences?

Hey, I am running a multiple regression and was asked to compute power analysis for a difference between two slope within the regression line. What I do is looking on differences between father...

02 July 2020 7,951 3 View

How to read IR-CLPM MPLUS output?

Hi everyone, I want to use the RI-CLPM to analyze associations between two continues variables across 3 waves. I was able to run the R-CLPM but not sure where I find the results for the...

10 November 2019 3,168 2 View

How to find the Variance covariance matrix in MPLUS?

Hello, I am running an MLM model in Mplus and struggle to find the variance e covariance matrix. I understand it takes two steps of finding the relevant parameter (tech 1?) and then looking for...

27 September 2019 8,708 2 View

Can I get R square for random slopes?

Hello, I am running a cross level interaction (random intercept and random slope) in Mplus. Is there a way to get the R square for it? I know standardized values are not plausible. Thank you!

23 June 2019 5,529 3 View

Does the number of cases in region of significance impact power?

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05 June 2019 2,241 0 View

What are the common attrition rates in a longitudinal study?

Hello, For the purpose of a grant proposal I need to estimate the rate of attrition in a longitudinal study. In a prior wave we collected about 300 families with a child at the age of 5. Now 4...

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Which Scopus Journal provides the most affordable fees?

"PUBLISHING IN A SCOPUS JOURNAL" Researchers are now at a cross road. The critical need to publish in a Scopus or ISI, etc journal is ever vital. Journal Publication fees must be submitted....

10 August 2024 8,621 1 View

Seeking Advice on Viability and Execution of Undergraduate Thesis Topic?

Hello everyone, I am currently developing a thesis proposal and would appreciate your input on its viability and how to effectively carry it out. My proposed topic is: "Does the perceived threat...

10 August 2024 8,992 0 View

Who will be moral responsible for the death of thousands of people in the event of an earthquake?

Who will bear moral responsibility for the deaths of thousands of people in the event of an earthquake? Weeks and months remain before the onset of strong earthquakes that bring death to...

08 August 2024 6,134 12 View

How to increase simulation box size?

We intend to study the interaction between peptides and polymer (like PP, PE and PS) through MD simulations using Martini force fields ( Martini 2 for PP and Martini 3 for PE, PS). We have...

08 August 2024 4,842 0 View

Does Anyone have expertise in in vitro transcription and RNA pull down assay?

I am currently working on LncRNA; to know the lncRNA-protein interactions I want to do RNA pull down assay, so I need to design primers with T7 promoter. I need assistance in this regard.

07 August 2024 6,622 1 View

Can I use a HisTRAP column for affinity chromatography?

I'm working on selecting antibodies against a recombinant protein that has a His-tag. My idea is to first bind the recombinant protein to a HisTRAP column and then use this column for an affinity...

07 August 2024 505 3 View

What precautions should be taken while handling S. aureus enterotoxin Type B in the lab?

I would like to understand potential safety concerns while handling SEB in the lab. Especially while working in animal house facility. Would like to know precautions for handling. Sigma MSDS...

07 August 2024 6,034 3 View

Unusual intensity drop in some sections of chromatograms in DDA?

Hi, we have measured tryptic peptides using both DDA and DIA method on QExactive. In DDA replicates i saw unusual intensity drops occurring at the same sections of chromatograms in DDA replicates...

07 August 2024 3,218 4 View

How to improve plaques in Double Layer Agar Assay?

Hi all! My thesis groupmates and I are working on purifying an E. coli bacteriophage. The phage was handed down to us by the previous thesis group, but they only managed to purify it to about...

06 August 2024 5,801 4 View

Are there any instruments for studying time similar to the way it is in space?

There are a huge number of methods for studying objects in space, according to the senses (and not only). Mechanical, thermal, optical, acoustic, electrical, magnetic, based on particle beams,...

06 August 2024 7,102 0 View