Elsevier publisher´s warning

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Can anybody suggest an accurate multichannel pipette which I can use for a large scale proteomic approach (0.5-10uL )?

I am establishing an HTS method for protein quantitation and I need to work with more than 100 samples / day. I am using an 8-channel eppendorf multichannel, but I am struggling since mainly the...

07 August 2013 2,447 11 View

To remove BSA from cell medium

Hallo to everybody, I have a question about the possibility to remove BSA from the cell medium. Has anyone tried to do it by TCA/acetone precipitation? Are there any specific protocols or may I...

05 June 2010 6,819 6 View

polarized/non-polarized membranes

Hallo to everybody, I have a small question regarding plasma membrane in epithelia cells: it is known that they are high polarized (basolateral and apical membranes), but in case of cancer has...

01 February 2010 572 0 View

Enzyme activity assay

Hallo to everyone! I have a question concerning the measurement of enzyme activity in vivo. Does anyone know a simple a reliable method to study the differential activity of enzymes in serum?...

01 February 2010 4,668 11 View

Glycoproteomics

Hello everyone, I would like to know whether anyone of you has already used the GlycoProfile III by Sigma for detection of glycan residues on PDVF membranes. My question is more regarding WB...

01 February 2010 4,410 4 View

How to compare 2 samples recruited with different sampling methods?

If I want to compare characteristics of 2 groups of patients, one group is recruited from a random sample of the general public while another group is from a sample with a fixed gender (male to...

26 February 2021 3,526 3 View

Do you consider undergoing a structure literature review / Meta analysis and getting numerical findings sort of quantitative method?

I am looking for a classification of the research methods included in literature review papers or Meta analysis ones .

22 February 2021 1,131 4 View

Can I do two kinds of mixed method in explanatory research?

Dear distinguish professors and scholars, I have a research in measuring two kinds: think tank capacity and research impact on policy. Can I do two kinds of mixed methods in order to find, "Is...

20 February 2021 6,897 1 View

How to analyse a (perceptual) study using differing/comparable sets of stimuli?

I plan on running an online perceptual experiment that has, let's say, 100 unique video stimuli altogether. Since these are too many to be rated by every participants, I would like to present the...

15 February 2021 7,444 2 View

How to analyse a split-plot design in stata ?

I have run an split-plot design experiment evaluating the efficacy of a treatment (with 3 whole plots and 4 sub-plots), and I am planning to analyse the collected data in Stata. However, I do...

14 February 2021 7,800 7 View

Can I use a likert survey for criterion sampling in a qualitative study or would that make it mixed methods?

I am doing a phenomenographic study on the reading experiences of avid v. Neutral v. Non-Readers. If I use a likert survey to criterion sample for participants, does that make it a mixed method...

09 February 2021 8,594 3 View

How to create the context-mechanism-outcome configuration (CMOc) in the realist methodology?

In the realist methodology (especially by Raymond Pawson et al), the CMOc is a common structure to explain what works, for whom, in what circumstances, and why? I'm always asked about the...

08 February 2021 2,792 1 View

Recommendations for sample size in visual qualitative research (using children's drawings)?

Hi everyone! Asking for a little help, if I may. I am working on a research project, where I aim to analyse children's drawings about Covid-19. I am fairly new to using visual data in qualitative...

07 February 2021 9,530 3 View

How do I create a categorical variable, level of exposure, and a dummy dichotomous, yes-no, variable for the Harvard Trauma Questionnaire Part 1?

I am using the Harvard Trauma Questionnaire (HTQ) Trauma Events scale (original version) that has 17 items (17 different traumatic events) with 4 response options, indicating 4 levels of exposure:...

04 February 2021 1,509 3 View

How to report path analysis / SEM with Yuan-Bentler correction from R output?

Dear all, I am currently writing my master thesis where I am analysizing my data using path analysis and SEM in R (lavaan package). Now that I like to write up my results, I am struggling with...

04 February 2021 8,993 2 View

Jaime A. Teixeira da Silva

Stella, this may be of interest to you and your readers:

https://www.researchgate.net/post/Elsevier_and_the_expanding_metrics_and_or_open_access_culture_in_academics_quo_vadis

Ljubomir Jacić

Dear Maria Stella Ritorto , I have got the alert from Elsevier yesterday.

This is very good article with fine tips and suggestions.

https://www.elsevier.com/connect/authors-update/fraudulent-emails-requesting-payment-a-warning-for-authors

Rasel Ahmed

Thank you for the warning Dear Maria Stella Ritorto.