Afrina Zainal

4 Questions 4 Answers 0 Followers

Questions related from Afrina Zainal

What is the wavelength to measure OD of Sf9 cell culture?

Hi. Does anyone know what is the wavelength for Sf9 cell culture? Is the wavelength different if i use spectrophotometer or microplate reader? Thanks.

10 October 2017 1,313 3 View

What is other assay besides vanillin-sulfuric acid assay to test for saponin?

Hi. Is there any other assay besides vanillin-sulfuric acid assay to test the presence of saponin? I'm doing extraction of saponin from banana peel. Thank you.

10 October 2017 7,546 3 View

How to search for possible compound based on peak absorbance?

Hi. I constructed an absorption spectrum of my plant extract, ranging 200-700 nm, using UV-vis spectrophotometer. I obtained four peaks. How to search for possible compounds that represents the...

10 October 2017 7,413 5 View

What is the principle of vanillin-sulfuric acid assay to quantify saponin?

I'm doing extraction of saponin from banana peels. i use vanillin-sulfuric acid assay to but got some error. all my samples become black after incubation and give 3.00 absorbance. may i know what...

09 September 2017 4,332 6 View