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

Pentatomidae from Cape Verde, is that Thyanta sp.?

Specimen presented on the photo comes from Cape Verde. I suspect Thyanta sp.? Is it correct? Best regards Grzegorz

29 January 2020 9,204 3 View

Does anyone have any experience with conducting a factor analysis of the Brief Symptom Inventory (BSI)?

Is its factor structure congruent with that proposed by its author(s) or could be regarded as questionable?

15 January 2020 4,423 3 View

Is happiness in isolation, a sign of ageing or maturity or any psychiatric disorder?

lonliness is the new happiness in the modern world. is it good or bad for the human race?

09 October 2019 5,313 7 View

What is light therapy? what are its applications in medical field?

techniques, uses, disadvantages,mechanism of light therapy?

09 October 2019 4,300 5 View

How to find Phd(neuropsychology) candidate position in Europe?

suggest phd candidate position with full scholarship.

05 June 2019 9,608 4 View

Titled " Fluoxetine in post-traumatic stress disorder.".I can't access this article.?

I found an articles, titled " Fluoxetine in post-traumatic stress disorder." in the Journal of Clinical Psychiatry. I found it may help me achieve my goals in this research field. However, I am...

14 February 2019 1,026 10 View

Titled " Fluoxetine in post-traumatic stress disorder.".I can't access this article.?

I found an articles, titled " Fluoxetine in post-traumatic stress disorder." in the Journal of Clinical Psychiatry. I found it may help me achieve my goals in this research field. However, I am...

01 February 2019 5,556 10 View

How do you choose a comparison group for a retrospective cohort study?

I am trying to do a systematic review on whether autism spectrum disorder (ASD) is predictive of later psychosis. I have decided to look at studies that follow-up cohorts of children with ASD who...

31 December 2018 9,231 5 View

Psychosis are frequently extracerebral disorders?

Infectictous, metabolic, endokrinological, toxic, drug abuse, ect.

27 November 2018 3,551 7 View

There are been any advance or research in neurosciences regarding Bion vision of dreams as a way to think ?

I think that Mauro Mancia and Thomas Ogden gave valuable contributions

09 October 2018 9,619 0 View