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Define ascending type of paper chromatography?
The ascending type consists in dipping the lower end of the paper containing the sample spots into the solvent so that it is above the solvent depth and then allowing it to rise up the paper by capillary action. The mobile phase or solvent moves in the upward direction against the gravitational force. The rate of movement of solvent becomes slower with increasing height which provides enough time for partition equilibrium between the two phases to take place. However the disadvantage in this is that compounds with low Rf values may not separate well.
Q. Do bacteria cells have a nucleus? In bacteria the genetic material is dispersed in the cytosol and there is no inner membrane that delimits a nucleus.
How many grams of sodium dodecyl sulfate (mw = 288.37) would you dissolve in 80 mLs of water to make a 20% solution of SDS?
Assuming that the equilibrium potential for sodium ion across a skeletal muscle is +66 mv at a temperature of 37 degree celcius when the external concentration is 145 mM and the in
similarities of male and female
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How does the intensity of simple diffusion differ in relation to the concentration gradient of the moved substance? The higher the concentration gradient of a substance the ext
Differential reinforcement of other behaviour (DRO) This is used to decrease frequent behaviour by reinforcing any behaviour other than the undesired one. An instance would be r
Alkaline Phosphatases use water as a second substrate. Why do we still treat their kinetics as if they were for a single-substrate reaction?
explain nature of plasma membrane?
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