11 Questions 15 Answers 0 Followers
Questions related from Samar Khattab
one of the reviewers wrote this comment: Fiber diameter measurements lack error bars and statistical significance testing. Only average values are reported without standard deviations. i dont...
last month 4,090 3 View
i have synthesized a copolymer based on polyvinyl benzyl chloride and the resulting copolymer isnot soluble in DMSO or in any solvent but, instead it has a swelling character. Can i do NMR for...
21 July 2023 5,666 4 View
I need to evaluate the antioxidant and cytotoxicity activity for polymeric material . It doesnt dissolve in common organic solvents even dmso. Is there is a way to do such test!
28 June 2023 8,805 3 View
can i determine the degree of amination using TGA? i have copolymer and make modification on it using amine to insert amino groups if i have the TGA of the copolymer and aminated...
08 January 2023 3,449 4 View
i am studying the variables (study of initial dye concentration ) for removing methylene blue (mb) using a composite that i prepared. the results showed that on increasing dye conc, the removal...
02 October 2020 3,284 3 View
I carried out Xray diffraction for microcrystalline cellulose (MCC) and below is the attached file , it shows two main diffraction peaks of the 2 ceta angles at 11 and 22.5 degree. i have two...
17 July 2020 3,762 0 View
I try to encapsulate a drug (Diclofenac pot.) into a micelle and study its release. Firstly I use thin film hydration method is this method suitable? Since both drug and polymer are soluble in...
27 December 2018 2,160 6 View
i prepared ammonium salt of polymer and it is yellow color , i want to electrospun this compound , can i do that ? and what is fiber color that may produce?
22 December 2016 344 4 View
if i have a copolymers, one has hydrophilic and other has hydrophobic nature, when dissolving in water/ methanol, they displayed diameter over 1000nm using DLS technique what is 1000 nm indicate...
01 January 1970 4,111 11 View
Hello, I need to understand why polymer such as polyacrylonitrile (which is water insoluble) doesn't dissolve in water after amination with any amine. Amino groups is hydrophilic and should...
01 January 1970 5,647 6 View
can any one give me the exact procedures for reduction of cyano groups into primary amine using aluminium hydride? i know the general condition which are, reaction is performed in THF or diethyl...
01 January 1970 8,542 1 View
