How to Detect Water in THF (Tetrahydrofuran) ?

Hello, we have solvent purifier system in our lab. But There is some unwanted results for our experiment. We are suspecting purity of solvents. Are there any simple methods to detect water in THF?

19 November 2020 114 5 View

If an animal feeds mainly on algae but also eats cyanobacteria and insects, which group does this animal belong to; herbivore or omnivore?

I wonder if a fish (Random sp.) feeds mostly on plankton but also consumes cyanobacteria and some insects (Chironomidae, Simuliidae) at much lower rates, can we classify them as omnivore?

03 March 2020 8,177 4 View

How does the amount of amino acid exceed the amount of crude protein in fish meal (Dry matter basis)?

I read a SCI article where the author analysed several fish meals' amino acid profiles and crude protein levels. I.E., The findings indicate that the crude protein level is 79.50g/100g for fish...

16 July 2019 2,039 6 View

Which one should I choose from the results of a sample with different amino acid analysis methods?

I have a protein source with varying results of amino acid profile. For instance; when the sample is hydrolysed with "6 M HCI" L-Valine level is 0.24g/100g whereas it is 3.08g/100g when...

23 February 2018 5,648 2 View

What is the difference between higher order (second order) confirmatory factor analysis and bifactor analysis?

24 July 2017 5,178 5 View

How to determine total RNA concentration when you have large amount of miRNA?

I am isolating total RNA with miRNeasy micro (PBMCs) miRNeasy serum plasma (serum) and exoRNeasy (serum/exosome) for Next Gen Sequencing for miRNA. I believe my final product should contain mostly...

30 March 2016 3,006 4 View

How can I do a reaction between polyamine and lipoic acid NHS ester in an organic solvent?

I want to do this reaction but as far as learned from literature, NHS ester-amine reaction is done in a phosphate buffer solution between pH 8 to 9. However, lipoic acid modified polymer...

27 June 2015 1,731 3 View

An economic method for the fluorescent labeling of PCR fragments?

I have a trouble with my pcr reactions and i want to ask you where is my fault.I designed six primer pairs according to Schuelke's M13 methods but I did not get any reaction.One of my primers...

23 December 2014 4,623 5 View

What is the reason for different fold changes in gene expression from independent experimental repeats in Real-time PCR experiments ?

25 October 2014 7,228 3 View

How should I calculate a touchdown PCR reaction with a low dna quantity?

14 September 2014 2,091 3 View

Is there no general protocol for vaccination study?

Hi, I searched vaccination study to know which MLD50 is suitable for influenza virus study in pubmed. But why every vaccination and challenge conditions are different? Is there no guideline or...

16 January 2021 7,984 3 View

Will the new COVID-19 strain, identified in England, affect the vaccine?

According to the CDC, the UK variant has an unusually large number of mutations -- 14 changes and 3 deletions in its genetic code that impact the building blocks of its proteins. This virus has 17...

23 December 2020 375 15 View

Follow up tests to explore interaction effects in a multiple logistic regression: can someone help explain my contradictory results?

I am conducting a logistic regression in order to examine whether there is an interaction between the number of stressors participants were currently experiencing (between 0-9) and their current...

20 December 2020 1,043 9 View

The most of Physicists, who worked in the field of Statistical physics, committed suicide. Is statistical physics really a killer subject?

Tragically, in 1906, Boltzmann committed suicide and many believe that the statistical mechanics was the cause. He provided the current definition of entropy, interpreted as a measure of...

19 October 2020 9,482 18 View

What are the community-based primary prevention of NCD in LMIC country?

Please suggest types of literature to look for? Recommend journals which focuses on these issues.

12 October 2020 2,878 4 View

How write a concept note on Evaluation of community-based primary prevention models for NCDs?

1. What type of literature should I read for writing a successful concept note? 2. Is there any literature which will help me decide a research question/objective for designing a study will be...

12 October 2020 3,363 5 View

Can someone help me decipher the validity and reliability of a pre-existing survey?

I am trying to decipher the validity and reliability of a pre existing survey? Here ia what the article from the researcher states: Sample size and statistical methods No formal sample size...

21 August 2020 8,067 3 View

Is a virus created in our body by some form of pleomorphism, instead of it being transmitted or the body getting infected by an outside source ?

The annual flu virus, is it made in our own body to heal us because we have become so toxic from food, pharmaceuticals , alcohol ,cigarettes ,lack of exercise ,drugs etc , or is a virus floating...

01 July 2020 2,375 14 View

Can a person who has had Coronavirus disease (COVID-19) get infected again?

Hello to all About 3 months ago, I asked this question, but I didn't get a comprehensive answer. Can a person who has had Coronavirus disease (COVID-19) get infected again?

14 June 2020 3,058 96 View

What do you think are the most important psychological disorders associated with COVID-19?

What do you think are the most important psychological disorders associated with COVID-19?

24 May 2020 1,165 55 View