16 Questions 9 Answers 0 Followers
Questions related from Marah Al Taher
I am using the 96-well MIC method. I diluted my plant extracts using 0.5% DMSO and I used Mueller Hinton broth to prepare the bacteria to achieve the correct log to start with but after that when...
20 November 2021 4,633 3 View
I am using the rotary evaporator to evaporate n-hexane, I used 250ml of hexane and I am evaporating it at 40-45°C. How long will it approximately take?
11 October 2021 1,164 5 View
Good day, I am evaluating my plant's flavonoid and phenol content, and I have repeated the methods several times, and each time my flavonoid content has shown to be higher than the phenol...
24 September 2021 8,037 3 View
Hello, I am trying to test the phenol content in my methanolic plant extract, and I am testing two methods. Method 1: "One ml of 20% sodium carbonate solution was added to 1 ml of the phenolic...
21 September 2021 8,456 3 View
I have acetic acid available (ml) and sodium acetate (g)
20 September 2021 1,209 4 View
Good day, I want to prepare a 0.2 N of FCR, but I don't know how to do the calculation. Is it the same as (1:10 dilution or 10%)? I'd appreciate it if somebody can help. Thank you
20 September 2021 4,525 6 View
Good day, I want to prepare an acetate buffer solution with a pH of 3.6. I do have an acetate buffer solution with a pH of 4.6 already in the lab. Can someone please tell me how to prepare a 0.3...
19 September 2021 6,663 0 View
I want to test the phenol content in my plant sample and I have chosen this method: "One ml of 20% sodium carbonate solution was added to 1 ml of the phenolic extract and incubated for 5 min. at...
18 September 2021 7,061 3 View
Good day, I would like to know what is the best solvent to redissolve my extract in after extraction to obtain the best results. Thank you
16 September 2021 9,336 11 View
I am using this method to test the flavonoid content in my plant sample: "a sample (1.0 mL) of the liquid extract was mixed with 4 mL of Milli-Q water, and 0.3 mL of aqueous NaNO2 solution (5%...
15 September 2021 2,790 4 View
I used 0.5g of my dried plant seeds and dissolved them in 4ml 100% methanol, left them in a shaker overnight, then the next day, I centrifuged the extract, took the supernatant, and filtered it....
25 June 2021 3,519 3 View
I am looking for a standard procedure to follow to extract oil from seeds using the soxhlet apparatus with n-hexane as the solvent. Thank you
19 May 2021 4,562 4 View
I am extracting oil from seeds using the soxhlet apparatus but all the procedures that I have seen call for a rotatory evaporator as the last step to evaporate the hexane. I don't have a rotatory...
19 May 2021 2,199 1 View
I want to extract oil using the soxhlet apparatus but I don't have a heating mantle. Is it possible if I use a heating magnetic stirrer?
16 March 2021 6,906 2 View
Hello! I am trying to interpret this rarefaction curve as I am reading an article regarding the relationship between gut microbiota and diabetes, but I can't understand the figure. So if anyone...
26 April 2020 5,447 8 View
Good day, If previous literature has already conducted RSM to find the optimum phenolic extraction conditions for a particular fruit cultivar, do I use these extraction conditions for my fruit...
01 January 1970 6,756 3 View
