33 Questions 28 Answers 0 Followers
Questions related from Azlan Nazeri 亚之兰) アズラン
Dear All As we know, to determine the detection limit for AAS /ICP, we can do 10 blank tests and then calculate the standard deviation, so that LOD and LOQ can be calculated. My question is how...
24 March 2022 9,166 4 View
Dear All What standard code to design HDPE (High density polyethlene) tank? for carbon steel can use API 650 (oil storage) For pipe usually can use Asme B31.3 (SS and CS)
21 June 2021 8,914 1 View
Hi all May I know what the value of evaporation rate (ER) for n-hexane? I wanna to calculate the ventilation rate, Q. At safety data sheet (SDS) is also not provide the ER information ii)...
06 August 2020 7,013 3 View
Dear All May I know, What the differences between Fan static pressure (FSP) and Fan Total pressure (FTP) in Local exhaust ventilation (LEV) system? Which value that rotate the fan in pump system...
01 May 2020 5,152 0 View
Dear All Last time, I have analyzed dragon fruit peel extract using UHPLC-MSMS. It can be seen for total 13 compounds were detected, only 6 compounds have the activity as antibacterial against S....
26 July 2018 329 3 View
Dear All what the effect of dragon fruit peel on the water pollution?How danger it is? is it related with BOD,COD,pH Regards Azlan
26 July 2018 1,168 5 View
Dear All Why are S. aureus and E. coli selected as target strains for most of the research study on antimicrobial activity measurement? Is it this strain easily react with antimicrobial...
28 April 2018 779 10 View
Dear All I wanna check my sample with scanning electron microscopy(SEM) on before and after extract sample using microwave assisted extraction (MAE). This is to see structural disruption of...
23 April 2018 2,618 0 View
Dear All I already found the result for phenolic compound that analyzed by UHPLC-ESI-QTRAP-MSMS as file attached. My problem is how to differentiate between phenolic acid and flavanoid? From these...
17 December 2017 6,712 6 View
Dear All In my experiment, I used 1.2 gram of dried peel and then dissolve into the 50ml water as solvent extraction at Microwave assisted extraction (MAE). The problem is, the peel cannot fully...
17 December 2017 6,700 3 View
Dear All I wanna publish my paper 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....
09 October 2017 3,296 0 View
Dear All I already done run experiment Optical density versus time for two types of microbe against dragon fruit peel extraction (as file attached). From this graph, Is it correct for its...
11 August 2017 8,967 6 View
Dear All 1ml of each bacteria culture were reinoculated into new sterilized conical flasks containing 50 mL of Tryptone Soya Broth. 3 mL suspended E.coli from conical flask were pipetted and...
07 August 2017 8,990 0 View
What differences between Kirby-Bauer test and disk diffusion test? is it the same thing? Both of them use filter paper impregnated with a standard of sample extracted, then placed onto an agar...
10 July 2017 2,511 5 View
Hi All, I'm using Kirby-Bauer Test to check Zone of Inhibition Test. It is used clinically to measure antibiotic resistance and ability of antimicrobial agent to inhibit microbial growth. The size...
01 July 2017 113 29 View
Dear All Here I attached my antioxidant result for your perusal. Result for IC50 is 0.52 mg/ml. that is the amount of antioxidant necessary to decrease by 50% the initial DPPH concentration. May I...
18 June 2017 168 7 View
Dear Friends I wanna use dragon fruit peel as source for extraction active compounds in my research. But I never found the comparison phenolic content or antioxidant level in the dragon fruit with...
07 June 2017 3,338 3 View
Dear Mr/Mrs I already extracted my dragon fruit peel inside the microwave assisted extraction (MAE) by using water as a solvent. MAE is the close system extraction.But my sample is not fully...
28 April 2017 2,841 1 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...
22 April 2017 1,347 7 View
Dear Researcher Before that, I just use lc ms to identify phenolic compound in liquid extract. then liquid extract was applied into freeze dryer to become dry sample. after that I applied FTIR to...
23 March 2017 4,807 3 View
Dear Friends In my case, the liquid extract from microwave assisted extraction is freeze dried to remove the water content. after that, Lc-msms is used to identify type of phenolic acid and...
01 March 2017 9,738 1 View
Dear Friend Actually I wanna perform Lc-ms on the liquid extract in two condition which is before and after concentrate the liquid extract. here i used freeze dryer to concentrate the liquid...
07 January 2017 4,092 3 View
Dear All Just asking your opinion, I already extract my sample using microwave assisted extraction. the solvent is distilled water. my target compound is mineral analysis, type of phenolic acid...
16 November 2016 5,496 5 View
Dear All Pertaining on the title, I would like to know, how do you double check the result to ensure all compound identified is correct. Here I attached the lc-ms result for perusal. I don't have...
15 November 2016 1,424 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...
12 October 2016 6,377 6 View
Dear All My target is to use natural solvent that free toxin such as water in extraction active compound from dragon fruit peel. the active compounds such as phenolic content and mineral profile....
11 October 2016 6,104 2 View
Dear all I extracted active component such as mineral content and phenolic compound from dragon fruit peel by using Microwave Assisted Extraction and water as a sovent. My question is should I use...
01 October 2016 2,101 5 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...
02 September 2016 4,832 14 View
Dear All As a briefly the chemical analysis of dragon fruit peel extraction consist of vitamin c, phenolic and mineral content. what type of fungal should i use in antifungal activities on the...
02 August 2016 4,548 1 View
Dear All I already analyzed dragon fruit peel extraction solution by using ICP-OES. Ca, Fe K, Na & P are elements concentration that identified in the sample. Which one elements that can...
24 June 2016 6,411 2 View
Preservative is the best way to ensure product safety from microbial contamination. Always use preservative when microbes can grow especially when the product contained a lot of water and...
19 June 2016 8,527 1 View
Dear All I will extract active compounds from dragon fruit peel to be incorporated into chitosan gel.The function is for antimicrobial and antioxidant. It also can be as additive product to...
11 June 2016 9,684 5 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...
09 June 2016 421 11 View
