Rachel Siregar

7 Questions 1 Answers 0 Followers

Questions related from Rachel Siregar

Why we do use reversed phase in HPLC?

my research is analysis formaldehyde in fish using HPLC method, so i have to use reversed phase in HPLC, why we have to use that? what happen if we use normal phase to analysis formaldehyde?...

10 October 2016 1,516 4 View

Why do we have to stirred acetophenone , ethanol and potassium hydroxide (KOH) under low temperature (0-3 degree celcius) in chalcone synthesis?

i'm synthesizing chalcone using condensation of 4-methylacetophenone and terepthaldialdehyde

08 August 2016 370 2 View

What is the function of saturated NH4Cl solution and brine in chalcone synthesis?

i'm synthesizing chalcone using condensation of 4-methylacetophenone and terepthaldialdehyde

08 August 2016 8,425 1 View

Can we use fisher john to measure the melting point of compound that has it over 200 degree celcius?

i'm trying to measure oxadiazole's melting point. according to literature, it is above 200 degree celcius

05 May 2016 8,065 1 View

Does anybody know what plant has an oxadiazole compound in it?

if we have to isolate oxadiazole from plant

03 March 2016 7,237 1 View

Is anyone know original reference about bioactivity of thiadiazolo[2,3-b]quinazoline?

any bioactivity except antifungal. thank you very much

03 March 2016 5,255 1 View

Is it possible to get different fluorescent from same compound with different subtituent in TLC?

me and my friend synsthesizing 1,3,4-oxadiazole with different substituent (just the position actually, mine is ortho and my friend is para)

03 March 2016 9,617 1 View