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Questions related from Azlan Nazeri 亚之兰) アズラン
Dear All I have checked OD(optical density) reading of microbe against dragon fruit peel extracted using uv vis. The wavelength use is 600nm. May I know as theorytically how this instrument get...
07 July 2018 1,867 0 View
Dear All One of my analysis is check antibacterial activity using zone inhibition test. The result found is no colony appear on the disc. The reason is might be high molecular weight, chemical...
04 April 2018 4,343 0 View
Dear All I have one manuscript entitled "Identify Type Of Phenolic Compounds Using Uhplc-Esi-Qtrap-Msms And Antibacterial Activity On Liquid Extract Of Pitaya Peel" What kind name of journal...
01 January 2018 7,772 6 View
Dear All I have a journal entitled DETERMINING THE CONCENTRATION OF MINERAL CONTENTS AND TYPE OF PHENOLIC COMPOUNDS USING ICP-OES AND QTRAP-ESI-MSMS ON LIQUID EXTRACT OF PITAYA PEEL. Which...
08 August 2017 4,665 0 View
Hi all What differences between polar compound and organic compound? polar is like charge positive or negative such as phenolic compound. Meanwhile organic compound contained C and H molecules. Is...
06 June 2017 5,400 0 View
What difference between phenolic acid and flavanoid, Can I said, phenolic acid have benzene ring that attached with 1 carbon or 3 carbon. Besides that flavanoid is combination from phenolic acid...
06 June 2017 8,647 2 View
what differences between ferrous and non-ferrous metals?are they include in the precious metal?
05 May 2017 1,802 4 View
Dear All Which one is better to determine phenolic compound inside the dragon fruit peel either use QTOF or QTRAP? ESI QTRAP is normal resolution but with ion trapping for better spectrum...
04 April 2017 9,583 7 View
Dear All I already analyzed dragon fruit peel using lc-qtrap-esi msms to identify type of phenolic compounds by using full scanning mode. Here I attached file for your perusal. Can I said this...
04 April 2017 2,225 2 View
Dear All I would like to know, let say i used method A in identification of active compound and another journals used method B to identify active compound, is it known as research gap? or...
11 November 2016 5,811 1 View
Dear All Can I just use water as a solvent to extract active compound from dragon fruit peel using microwave assisted extraction (MAE)? the active compound is vitamin c, phenolic content and...
09 September 2016 6,921 3 View
Dear All Kindly to ask you, is there any relationship between antioxidant and antimicrobial activity? since I already extract active compound from dragon fruit peel using distilled water as a...
09 September 2016 777 14 View
Dear All What the proper method to check color stability test? I will extract pitaya peel by using water as a solvent, the red color appeared on the solution extraction. it's interesting.
08 August 2016 2,666 4 View
Dear all I wanna apply spss in log reduction. what the best probability should i use it? either p
07 July 2016 1,209 2 View
Dear All What ASTM code for cosmetic stability test? May I know, is microbial test one of the cosmetic stability parameter?
06 June 2016 4,575 0 View
Dear all what the best solvent to dissolve DPPH? before that I used 70% ethanol as file attached, but it not fully dissolved. Besides that I quite confused, what the important is IC50? why should...
06 June 2016 5,595 11 View
Dear Friend Why are we getting two graph for gallic acid chromatogram as in the picture attached? IS there a difference between the 2 graphs? May be it used two different mode which is scan and...
01 January 1970 2,729 3 View
Dear All I'm planning to use HPLC-MS in identification of type phenolic compound in my sample solution extraction. I will extract dragon fruit peel into Microwave Assisted Extraction (MAE) by...
01 January 1970 2,232 6 View
Dear Friend Actually I already used Freeze dryer to remove solvent extraction from liquid extract. so what happened to the sample is it be like a film and not in powder form (as picture attached)....
01 January 1970 8,678 2 View
Dear Researchers Can I use NMR to identify type of phenolic compound inside the pitaya peel? so i just dry pitaya peel to remove water content by using freeze dryer and then blend the dried sample...
01 January 1970 406 14 View
