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Questions related from Hossein Shaki
IC50 is one the important and valuable parameters on pharmaceutical research. In the literature, there are different methods to measure the IC50 of a drug formulation on the specified cell lines....
03 March 2018 1,426 0 View
MALDI-TOF mass spectroscopy is a precious method to measuring the molecular size. But there was a problem during measuring fatty acid with DBH (2,5-dihysroxybenzoinc acid) matrix. In this method...
06 June 2015 765 4 View
In our synthesis, the hydroxyl group of a polysaccharide should be attached to an Amine group of another molecule which has two amine groups in both ends of its molecular structure. Is there any...
12 December 2014 5,202 24 View
In organic solvent such as DMSO, DMF, and Acetone, is it possible to measure pH of solvent or is the parameter of pH applied for this kind of medium? and if the answer is yes, how could change the...
12 December 2014 1,511 8 View
In fluorimetry tests with Pyrene probe (as fluorescent material), in first test the fluorescence emission was measured by 5 nm bandwidth, but in second test the emission was out of range and we...
11 November 2014 4,663 4 View
In Fluorimetry test, two parameters are reported: slit and bandwidth. What is these two parameters and how important are those parameters in fleorimetry test?
11 November 2014 7,923 5 View
I have synthesized a polymer with dextran and in FTIR spectra. There are many peaks which are related to different molecular bonds in polymer structures. And a specific peak (such as a peak in...
11 November 2014 2,680 13 View
Oxidation of polysaccharide such as dextran with oxidant resulted to breaking of C-C bound in glucose unit. This breaking concluded to formation of aldehyde group. What is the peak of carbonyl...
11 November 2014 2,281 2 View
There are several solutions with different concentration of a fluorescent material which it's concentration are between 10 to 100 ng/ml. The available method is flourimetery.
09 September 2014 9,849 10 View
Surfactants are molecules with a hydrophilic head group and a hydrophobic tail. They can make micellar structures in aqueous and non-aqueous solution. But there are some new materials which are...
05 May 2014 6,493 8 View
Zeta potential is a kind of electric charge which is produced around the surface of particles in colloidal solution. But I would like to know is there any charge around the molecule (such as...
04 April 2014 3,690 13 View
