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Questions related from Andrés Corimayhua Silva
Dear researchers With regard to scientific publishing, it is important to have a licensed statistical software. In my case, unfortunately, my license of the software STATISTICA (Statsoft)...
31 May 2023 9,692 0 View
Hi everybody I tried to work with 1-octanol in order to avoid bubble formation during the whole digestion process. However, it did not work since during digestion with sodium hydroxide there was...
31 August 2022 6,298 3 View
Dear community Refined wheat flour was analyzed for total dietary fiber, that is, insoluble and soluble fractions, by enzymatic method using the Megazyme Kit. According to the results: Total D.F....
08 May 2020 6,970 4 View
Hello everybody Regarding that normality of Folin Ciocalteu is between 1.9 - 2.1 N. I've prepared 1 N Folin Ciocalteu diluting 10 ml F-C in 10 ml H2O (1:2). How do I check that 1N F-C is well...
05 December 2017 9,842 5 View
Hello everybody I used a RCCD to optimize phenolic compounds extraction parameters of a plant. Before this, I performed a factorial design to choose an adequate zone. As a result, central point...
23 November 2017 7,454 4 View
Hello I tried to valorize hydrochloric acid through titration with sodium hydroxide. First, I wanted to check the normality of hydrochloric acid 0.1 N. So, 3 drops of phenolphtalein were added to...
17 June 2017 7,292 6 View
Good afternoon Question is related to phenolic compounds. The method was performed as follows: - First, 20 ml of ethanol were added to 0.1 g of dry sample. Second, the extract (0.1 ml) was used to...
17 May 2017 8,091 12 View
Hello everybody In protein determination through micro-Kjeldahl or kjeldahl method it is common to use 6.25 factor. But, this is used for corn, meat, eggs and other kinds of foods. What would the...
07 May 2017 7,601 3 View
For example, It's needed to dilute a solvent X in distilled water in a 1:6 ratio. Normally, it has been prepared diluting 1 ml of solvent X in 5 ml of H2O, so the final volume in the flask is 6...
17 April 2017 4,404 5 View
It's a diagram in which is detailed the procedure to prepare a standard curve of gallic acid in a concentration range between 0 - 500 mg/L and I'd like you to check the following and tell me if...
06 February 2017 7,710 11 View
