Rogelio Valadez-Blanco

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Questions related from Rogelio Valadez-Blanco

Which common enzymes can be used for the enzymatic determination of tryptophan?

Enzymatic methods have been reported for the accurate quantitative determination of tryptophan using Pronase ( Spies. Anal. Chem. 1967, 39, 12, 1412–1416 ) and Papain. Is it possible to use other...

07 August 2020 5,597 4 View

How to obtain a smooth and fine microbial powder from a fermentation broth by freeze-drying?

I´ve been trying to obtain valuable viable bacteria by freeze-drying of the fermentation broths, but ended up with a crystalline hard film. I would to obtain fine and smooth powders, similar to...

31 October 2018 7,030 5 View

Can an expert please give me advice on this specific microalgae identification?

Dear microalgae researcher, We have a microalgae culture obtained from a domestic fish tank. We are testing the culture in a photobioreactor prototype in our University. Here I attached some...

19 March 2018 9,600 11 View

Which assays and extraction solvents can be used to determine the antioxidant activity of lipophilic compounds, e.g. tocopherols and carotenes?

Most of the literature methods are focused on the hydrophilic extracts, thus using polar solvents for extraction. I need to determine the antioxidant activity assay due to the lipophylic compounds.

08 December 2015 6,847 12 View