23 Questions 3 Answers 0 Followers
Questions related from Fa Najafi
I've tested a variety of reagents for the synthesis of a compound and found one that has never been used before and yields a good product. after my experiments i did some research and came across...
09 September 2018 9,023 3 View
Hi everyone I have a question about showing significant difference between treatments in a table using letters. I have 6 total treatments (one control and 5 treatments) like this : Control...
07 July 2018 5,340 6 View
sorptivity is defined as the capacity of soil to absorb or desorb water by capillarity. but what does higher sorptivity mean? does it mean the part of infiltartion that depends on capillarity...
07 July 2018 1,678 5 View
Hello everyone! In my experiments i have 5 different treatments plus a control, each treatment was carried out 3 times and i wanted to know can i use one way ANOVA to analyze the results? if not...
06 June 2018 7,340 3 View
I've seen that the saturated hydraulic conductivity is calculated Darcy’s law and field saturated conductivity is calculated using philip's equation. what is the exact difference between these two...
06 June 2018 2,960 1 View
hi everyone i have some diethyl ether which seems to have some yellow colored impurities, i want to distill it, knowing that the boiling point is ~ 34 °C, it doesn't seem to need much heating but...
06 June 2018 2,017 4 View
what's the best method for synthesis of p-Toluenesulfonic acid doped polyaniline? can anyone suggest some good references? i have found some articles, but they are not very clear. also is...
01 January 2018 4,779 3 View
how is soil pH determined? I see that in some articles a 1:1 ratio of soil to water is used for determination of pH, and in some papers a 1:5 soil to water ratio is used, what's the difference and...
11 November 2017 2,141 16 View
After working with phenol what is the best way to clean the glassware contaminated with Phenol? is neutralizing them with 1M NaOH a good idea?
10 October 2017 7,666 2 View
I want to use cellulose in a synthesis but looking through manufacturer's websites to buy it , all i can find is Cellulose microcrystalline . as far as i know microcrystalline cellulose is...
10 October 2017 9,901 5 View
I vacuum distilled my aniline a while ago but now it has a slight yellow tint to it, i want to use it for polymerization. is it still usable? i would distill it again, but my vacuum system needs...
09 September 2017 8,982 11 View
I have some phenol (liquid) but it has a reddish brown/orange color. Has anyone encountered this problem? What is the reason? Is it oxidized? I'm not sure if I can use it in my reactions anymore.
08 August 2017 3,045 4 View
I want to check the purity of one of my solvents, aside from determining boiling point ,what other methods can i use? i'm mostly looking for simple methods.thanks in advance.
07 July 2017 6,194 3 View
in measuring water infiltration in a soil column with a constant head method using a Marriott bottle, how can i calculate infiltration rate ?Also in determining hydraulic conductivity of soil...
06 June 2017 8,541 4 View
does anyone know the reaction conditions for sulfonation of phenol?thanks in advance
06 June 2017 5,604 4 View
How can i Visualize aliphatic alcohols, specially fatty alcohols in TLC?
06 June 2017 9,458 5 View
I have a very viscous product, which I want to take for NMR spectroscopy, I was wondering if it needs any additional preparation? It almost doesn't flow at room temp , but can flow if warmed to...
05 May 2017 837 5 View
i have some old para toluenesulfonic acid (it has a a very slight pink tint to it ) , i was wondering if someone can tell me how can i recrystallize it?thanks in advance
05 May 2017 1,426 4 View
i have butanol as a solvent and reagent, and water is the byproduct of the reaction which should be removed, one article mentions "azeotropic removal" of water, does this mean i can use a dean...
04 April 2017 1,410 3 View
the product of a synthesis i work on is a highly viscous fluid, it barely flows at room temp, but it can flow when it is heated for a bit. i only have a small amount of this product and i was...
04 April 2017 3,623 1 View
Hi everyoneI have glucose in a reaction and i was wondering how much heat i can apply without causing the glucose to decompose? what is its decomposition temperature?Thanks in advance!
02 February 2017 9,864 3 View
DMSO melting point is 19°C , so is it possible to remove it from the reaction mixture by cooling it to this temperature (so it becomes solid ) and then filtering it?
10 October 2016 2,205 5 View
I was wondering if hydroxy terminated Poly(ethylene oxide) can become active again and be used in further polymerization reactions (specially anionic polymerization) to form a block copolymer?
10 October 2016 6,350 3 View
