01 January 1970 0 6K Report

Im performing fractionation of crude ethanolic extract of Withania coagulans with increasing solvent polarity (hexane, chloroform, ethyl acetate followed by butanol. I left butanol over night with this extract and in morning found no separation at all, how can i remove this butanol from water extract?

More Emi Khan's questions See All
Do you think can be any Uranium bearing rocks in Eastern part of Iran and western part of Afghanistan?

I want to know more about Uranium ore deposits in world.

11 August 2024 6,720 0 View

Do you think can be any diamond bearing rocks in Eastern part of Iran and western part of Afghanistan?

I want to know more about diamond ore deposits in world.

11 August 2024 2,167 1 View

What is the difference between mathematical R^4 space and physical 4D unit space?

We assume that the difference is huge and that it is not possible to compare the two spaces. The R^4 mathematical space considers time as an external controller and the space itself is immobile in...

10 August 2024 6,678 14 View

If Banks do not provide credit facility, what are the options available for FPOs and impact on producer’s income?

If Banks do not provide credit facility, what are the options available for FPOs and impact on producer’s income?

10 August 2024 8,198 5 View

Controlling for pupil light reflex when analyzing pupil size time course?

I used eye tracking to examine how participants from two different populations (A and B) react to an image. Participants in population A exhibit larger pupil sizes over time, but they also have...

10 August 2024 3,229 0 View

What are a “Farmers Producer Organization” (FPO) and its essential features?

What are a “Farmers Producer Organization” (FPO) and its essential features?

10 August 2024 477 5 View

Strugglling with m6A dot blot any suugesstion ?

I have been doing the m6A dot blot for a while with no improvement, I am extracting the RNA, and I can see the dots although the three biological replicas give a different reading on the memberan...

10 August 2024 8,539 5 View

Do interactions between biosphere, carbon cycle, & water cycle impact global warming & interaction between atmosphere & hydrosphere?

How do interactions between the biosphere, the carbon cycle, and the water cycle impact global warming and interaction between the atmosphere and the hydrosphere?

09 August 2024 3,291 2 View

How to get moment output in Abaqus Standart?

I have input a moment load in module load Abaqus, i put my moment load on the node surface (using reference point). I have define moment in history output and make a set for moment too. But the...

08 August 2024 4,831 4 View

How is energy cycled through the Earth's climate system and how do matter cycle and energy flow through the rock cycle?

How is energy cycled through the Earth's climate system and how do matter cycle and energy flow through the rock cycle?

08 August 2024 8,162 0 View

Similar questions and discussions
Why do paired electrons atoms produce no magnetic field lines?

If you think of electrons with spin as bar magnets, you know bar magnets of opposite polarity as long as they're not occupying the same spatial location don't cancel out each other's magnetic...

03 August 2024 3,927 2 View

How to remove/ replace trifluoroacetate countertop after deprotection?

After deprotection of the tert-butyl ester to generate the carboxylic acid in chloroform with TFA, my compound‘s pyridine moiety forms a TFacetate ammonium salt (small molecule drug, not a...

29 July 2024 9,753 3 View

Why methanol and sulphuric acid used in the analysis of polyhydroxyalkanoates (PHA) by GC-MS?

Why methanol and sulphuric acid, used in the analysis of polyhydroxyalkanoates (PHA) methyl esters by GC-MS? Additionally, why do we typically use non-polar solvents in GC-MS?

22 July 2024 1,210 2 View

What is gaussian input keywords to pe rform NLO, somebody writes #p, polar and other writes polar=enonly and polar =(DCSHG, Cubic)CPHF=RdFREQ?

I am new to gaussian 16 software and while doing non linear optical properties calculation hyperpolarizabiltiy polarizability dipole moment calculation I found different gaussian input keywords...

08 July 2024 7,551 1 View

Solvent recovery after extraction - Separation of Isopropanol + Water - how to do it best?

I want to make some yeast extractions with a protocol that uses Isopropanol and NaOH. So in the end i will have an azeotrope of Isopropanol and Water that comes from the cell and NaOH. Can you...

08 July 2024 9,201 2 View

How can I find the absolute maximum value of the Lamb-Oseen vortex with a no-slip condition?

R(t) = the propagation function of the vortex, where R=sqrt(4vt + R0^2) R0 = initial radius. w0 = initial angular velocity. Rf = the radius of the boundary confining the fluid. The Lamb-Oseen...

07 July 2024 3,680 0 View

How to remove DDQ from bodipy reaction only possible colmun chomatography tecnique use here ?

bodipy moiety are high polar nature .so its are bottom of TLC PALTE up to 20;80(ethyl acetate;hexane) mixture so its binding in SiO2 SO YIELD is so decreased. how to remove DDQ from reaction mixture?

02 July 2024 8,846 4 View

Why does a line appear in the middle of the carbohydrates TLC plate?

The line appears always in the penultimate run. We try to decrease the volume of the solvent system, wich is composed of butanol:acetic acid:water (2:1:1) (76 mL) but the line remains. Below I...

24 June 2024 9,829 3 View

What solvent should I use to make a Schiff base from a ketone starting material?

I need to do a Schiff base reaction starting from a ketone and 1,10-phenanthroline-5-amino. I've seen that both of these starting materials are not very soluble in methanol and ethanol, which is...

23 June 2024 5,925 3 View

How to calculate molecular surface area (MolSA) and polar surface area (PSA) in gromacs ?

In the molecular dynamics simulation analysis part, how to calculate molecular surface area (MolSA) and polar surface area (PSA) in gromacs ?

14 June 2024 1,469 1 View

Our partners will collect data and use cookies for ad personalization and measurement. Learn how we and our ad partner Google, collect and use data. Agree & close