Isaac Maqueda

5 Questions 5 Answers 0 Followers

Questions related from Isaac Maqueda

MacOS or online apps to make sketches of molecular interactions on 2-D?

There's a great app called ChemSketch but only compatible with Windows. I'm looking for similar options for a Mac user. Thnks!

30 November 2023 3,214 2 View

How to calculate UFC/mL from a non-diluted sample?

I did an experiment where I evaluated the growth of colonies of a bacteria in different samples. For one of them it was not necessary to do serial dilutions. In this case my dilution factor cannot...

20 November 2023 3,588 8 View

In spectrophotometry readings, does anyone know the difference between Absorbance and Standard Concentration readings?

I'm working with a Thermo Scientific GENESYS 10S Series UV-Visible Spectrophotometer. I took readings of a cell culture in two different modes: Absorbance (595 nm) and Conc/Std (Factor = 0.745,...

17 October 2023 2,884 1 View

Does anyone know the reason why some microbial growth curve protocols read optical density readings at 595 nm and others at 600 nm?

What is the difference? Does it affect viability? If there is a difference in measurement, is it significant?

16 October 2023 712 2 View

¿Pepsin stock solution stability at storage temperature of -20ºC?

I'm working with simulated digestive fluids. Due to the low concentration of pepsin that I need for my work, it is difficult for me to weigh very small amounts of the reagent each time I need to...

06 March 2023 1,370 2 View