I could see some oil in few of my hexane fractions. I wonder if there is any easier way to isolate this oil either by column or some other means.
Both 1H and C13 NMR values of my sample can be assigned to a known molecule except at one place. From reference values and theoretical point of view, a methine proton (CH) near to a methylene...
10 November 2016 2,929 5 View
The only reagent that I could use to see something is Blood reagent but the handling of this reagent is not as easy as anyother reagents. The fraction of such interest has been tried with spray...
07 August 2016 7,496 3 View
Kindly share your experience, if any, with bark phytochemistry. It would be grateful if I get a good tlc mobile phase for studying methanol extracts of bark that is known to contain polyphenols.
08 September 2015 9,730 0 View
I recently came by an article where toluene-ethanol mixture was used in soxhlet extraction. How efficient is this mixture of solvents than using single solvent for extraction?
05 June 2015 3,074 8 View
Please tell me if there is any in order to distinguish the spectra of terpenoids and steroids.
04 May 2015 9,780 9 View
Can vitamins be estimated/analyzed from dried samples preferably dried at 40 degree celsius?
01 February 2015 1,867 11 View
I would like to know if there is any especially while purifying a molecule and also in obtaining NMR spectrum of thus purified molecule. Does the presence of trace DEA or its impurities while...
01 February 2015 4,238 5 View
I would like to have one for my RP open columns. Please share your experience and thoughts. Also please share what kind of pump you have employed for your work.
31 December 2014 5,650 5 View
Looking for good explanatory notes to understand HMBC. Simple explanation with worked problem is also much appreciated.
11 December 2014 2,427 11 View
It would be very helpful for my work if anyone can suggest a way to remove perchloric acid from my sample for further chromatographic studies.
10 November 2014 9,727 3 View
I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...
08 August 2024 8,329 0 View
Evolutionary fitness is based on an organism’s ability to adapt rapidly to changing environmental circumstances. Large-bodied mammals have been equipped with large brains (and hence a high...
06 August 2024 4,849 2 View
Air moisture harvesting Air water collection devices
06 August 2024 5,473 2 View
Are increasing the costs of disasters in the affected countries.
01 August 2024 1,794 2 View
I have used PE and PE-Dazzle 594 fluorochromes and have managed to get NK cells to properly show GranzymeB expression after 4 hr PMA/ionomycin stimulaton, but for some reason my CD8 cells in the...
01 August 2024 7,677 2 View
Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...
31 July 2024 3,333 4 View
What are the roles of innovation in achieving the Sustainable Development Goals (SDG)?
31 July 2024 3,533 2 View
I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...
30 July 2024 6,420 1 View
Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...
27 July 2024 5,748 0 View
It has been long known that EDC carbodiimide and NHS easter's half life agains hydrolysis are highly related to pH. However, very surprisingly, not yet found a paper giving a table/chart of their...
25 July 2024 8,738 0 View