Sel Lee

4 Questions 3 Answers 0 Followers

Questions related from Sel Lee

Urgent!! Why are the pH of red and white grape juices different?

Hi, I made a single strength juice of red and white grapes using concentrated juice (clarified). They have same brix value, which is 11, but different total acidity (0.1366 for white, 0.1661 for...

18 August 2016 2,402 5 View

If curcuminoid or curcumin is oxidized, does it produce benzo-quinone?

As far as I know, hydro-quinones and benzo-quinones have at least two hydroxyl groups and oxygens, respectively, bonded to one phenolic ring. But the structure of curcumin or curcuminoid have...

26 November 2015 3,693 3 View

In a TBA assay (TBARS) using distillation method, why doesn't the distillate react with the TBA?

Hi, I'm performing TBA assay to measure the degree of lipid oxidation of raw pork, using the steam distillation method with Kjeldahl distiller. I collected 50 ml of distillate, and it didn't react...

03 August 2015 7,609 9 View

Why are so many different peaks found in the Gas-Chromatography result of one pure sample?

Hello Yesterday was my first time to use GC to determine amount of trans-cinnamaldehyde in cinnamon oil we have frequently used in my lab. I tried to draw calibration curve of a major compound of...

18 July 2014 5,513 11 View