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Questions related from Ranjit De
To purify a water soluble polymer from water soluble salts via dialysis, what should be the concentration of the polymer solution to be used inside the dialysis bag. The polymer is sodium...
09 February 2022 4,023 2 View
I want to conjugate FITC dye to a molecule having secondary amine (>NH). The -N=C=S group of FITC should be used keeping the -COOH group intact. I do not wish to change the target molecule as...
04 May 2021 402 8 View
I have a sample soluble in water. To carry out the Thin Layer Chromatography (TLC), which organic volatile solvent is recommended? It is also soluble in DMSO, however DMSO is not a volatile...
29 March 2021 8,091 2 View
A polymer having COOH group is coupled with a polystyrene bead having primary amine group, then ninhydirn test carried out in ethanol solvent. Absence of a peak at around 580 nm shows that the...
07 June 2018 3,863 4 View
I have been trying to couple the aqueous polymer with a COONa group at the terminal position with microsized particle having a lot of amine (-NH2) on its surface. I used aqueous media. I took the...
02 March 2018 6,028 1 View
I have a polymer sodium polystyrenesulfonate with one -COOH group at one terminal. This polymer is water soluble. I also have polystyrene microsphere (dispersed in water) with many amine groups...
29 November 2017 3,915 0 View
What is the frequency of measurement in conductivity meter Model: Orion Star A212 (Thermo Fisher)? I searched the manual of this instrument but could not find it. Any help will be highly...
11 August 2017 2,276 4 View
I have a polymer sodium polystyrenesulfonate chain which has about 45 monomer unit and each unit contains one -SO3Na group. The chain also has one terminal unit with -COONa group instead of -SO3Na...
11 August 2017 9,089 2 View
How do I convert %R to Extinction in UVvis spectrum?
14 May 2015 7,853 5 View
How to calculate binding efficiency(%) of nanoparticle in heavy metal removal for waste waste water treatment? Given; Dose (g/L) = X g of nanoparticles was used for 1 L of waste water containing...
02 April 2015 1,488 11 View
I want to record FT-IR of surfactant solution. I am wondering whether there will be a layer created at the interface of the liquid and the wall of the cuvette which might interfere the spectra. If...
13 August 2014 3,068 4 View
I wish to know the surface charge density of colloid particles in water by means of a practical method in lab. Please also suggest me some relevant papers. Thank you in advance.
07 August 2014 2,986 3 View
I have tried to separate the chemical mode from electromagnetic mode using a spacer layer of polyvinylpyridine, but found that intensity of all the peaks are reduced equally in case of a Surface...
07 April 2014 3,470 3 View
How to detect flavonoids in brain tissues via fluorescence microscopy? It is reported that 2-Aminoethyl diphenylborinate (ADPB) can interact with flavonoids and enhance the fluorescence intensity...
01 January 1970 3,362 3 View
I want to make gossypetin (a flavonol, a type of flavonoid) a fluorescent molecule for the purpose of bioimaging works. Very common way is to conjugate FITC with gossypetin to make it fluorescent...
01 January 1970 1,337 2 View
