ANCOVA controlling baseline in RCT - how to perform power analysis and sample size estimation?

Hi, I have a simple question. I am hoping to perform a power analysis/sample size estimation for an RCT. We will be controlling for baseline symptoms, and using post-treatment or change scores as...

19 February 2021 2,648 23 View

Why am I getting western bands with white bubbles?

12 October 2020 6,976 3 View

How would I determine if a protein (PD-1) is necessary for establishment of latent infection by a virus in a CD4 memory cell line?

If I were to plan an experiment to deduce whether or not PD-1 is absolutely necessary for HIV to establish latent infection in CD4 memory cells, how would I go about doing this? More...

09 March 2020 7,774 2 View

What is the most appropriate statistical analysis to assess between and within subject differences over time with most individuals with 2 time points?

I am looking at how hormone concentrations change over time both between individuals and in relation to fixed effects of predictor variables (n=7) within individuals. I have a large dataset of...

02 July 2019 8,734 9 View

I want to selecte resistance antibiotic bateria in the pond ? I was offer the MHA already but Could you give me some idea about an other medium ?

The antibiotic target is SMX and OCT,

30 June 2019 5,542 5 View

Calculating beam nodal displacements/rotations using SAP2000 and programming system matrices in MATLAB - Differences in responses?

I have programmed an Euler-Bernoulli beam, supported on springs, using both SAP2000, and by using the stiffness matrix method in MATLAB. The nodal (joint) displacements calculated due to an...

13 March 2019 8,597 3 View

Caco-2 cells showing high TEER (2000ohm cm2) after 21 days growth, is this normal?

I am working on the Caco-2 cell line, I'm particularly interested in changes in permeability under inflammatory stimulation. I am using growth conditions: 12-well transwell plates, seeding...

14 January 2019 3,047 2 View

Why Aren't My 1L Bacterial Cultures Growing Properly?

I performed a fresh transformation (with sequenced plasmid) into commercial BL21 competent cells. I scrape a colony into a starter culture w/ antibiotic overnight. I check the O.D. of the starter...

15 October 2018 3,171 9 View

How does emulsion polymerization work?

I would like a simple explanation of emulsion polymerization, and I would like to know whether the process requires UV light and how UV light will effect the process.

15 March 2018 7,706 3 View

Does Abcam's anti-TrkB antibody (ab18987) also bind activated or phosphorylated TrkB (p-TrkB)?

I've been using this anti-TrkB antibody in studies involving the activation of TrkB by BDNF. When I called Abcam to ask if it also binds p-TrkB, I was told that they've never tested it, and have...

20 February 2018 2,758 3 View

How can plant phytochemistry be included in discussions about whole plant traits?

I am using the concept of plant functional traits (Cornellisen et al., 2003) in a paper. Considering descriptions for whole plant traits (life history; life form; growth form; plant height;...

24 February 2021 6,831 5 View

How do historians determine the credibility sources in modern history?

For a source to be considered reliable it must contain accurate historical information. But how does one determine the accuracy and reliability of sources in modern and recent history since not...

23 February 2021 1,346 13 View

Resume Book UEP2013 Asian Edition, dis somebodey has it?

I am looking for a copy of the resume book of UEP2013 Asian Edition (Urban Environmental Pollution 2013 Asian Edition) held in Beijing. If somebody has it, please I would like to obtain an...

11 February 2021 2,247 2 View

Which tropical country is the most easy for obtaining research permit (for biological research)?

Dear all, High beurocracy hihly complicate field ecolocial and evolutionary research nowadays. Nearly all tropical countries (maybe all?) requires research permit for performitng research and in...

04 February 2021 3,672 6 View

What's the main sources for a study of "ethics" in the 1500-1620 period?

I would like experts to provide me with the philosophers of the 1500-1620 period who discussed "ethics" in all or parts of their career. Erasmus, Montaigne, Castiglione, Bruno, Sidney and their...

04 January 2021 7,054 3 View

What is a variabel to analyze empirically or attest a theory of Malthus (Economic Major)?

I have a project to evidence Thomas Robert Malthus theory about a principal of population (Malthusian Spectre/Malthusian Trap). I want to attest, his theory about a relationship of population and...

02 January 2021 8,146 3 View

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01 January 2021 5,831 1 View

Do you know anything about Elena Bokus, the early 20th Century Architect / Architectural Designer?

The available research of early 20th century history of architecture in North Macedonia, suggests that probably the first female architect / architectural designer was Elena Bokus (born in 1893...

23 December 2020 2,039 2 View

What are the last Climate change Scenarios that can be used globally especially in Asian?

There are some scenarios can be used in Asian orglobally

13 December 2020 7,397 3 View

Has any research on translation investigated the phenomenon of bilingual authors who produce versions of their books in both their languages?

Can the second-language version, strictly speaking, be considered a translation of the first-language version or is it merely a somewhat looser interpretation? How do such authors approach the...

10 December 2020 5,092 25 View