Miguel Lawrence Keith Celebre

5 Questions 4 Answers 0 Followers

Questions related from Miguel Lawrence Keith Celebre

How to crystallize curcumin from ethanolic turmeric extract?

I'm having difficulty recovering curcumin from my ethanolic extract. I tried reducing its solubility in the solution by slowly adding water, but the solid just crashed out of the solution in very...

04 September 2020 3,183 5 View

What technique can be used for imaging wet hydrogels?

I'm working on alginate-based hydrogels and I want to observe the microstructures (porosity, roughness, etc.). The hydrogels were produced by gelation in aqueous calcium chloride. SEM is out of...

31 August 2019 2,987 4 View

What is the bond and vibrational state corresponding to 1650-1530 cm^-1 in FTIR?

We obtained biochar samples by pyrolysis of waste bamboo, and I'm trying to characterize its functional groups using FTIR. However, I checked with multiple FTIR correlation tables, but I can't...

11 March 2019 306 3 View

What is the purpose of conditioning reagent in sulfate spectrometric (turbidimetric) analysis?

I'm using spectroscopy to relate the concentration of sulfate in solution with its turbidity. The principle is soluble sulfates are precipitated as colloidal barium sulfate. In this methodology,...

19 December 2018 8,249 1 View

Is polyethylenimine a viable plasticizer substitute to polyethylene glycol?

I'm fabricating membranes from carbohydrate biopolymers like alginate and chitosan. However, membranes produced from carbohydrates are crisp and brittle, which necessitates the use of plasticizer....

25 August 2018 6,346 3 View