Parası kalmadığı için otobüse binemiyordur ailesi porno izle ona daha yeni para gönderdiği için tekrar porno istemeye utanınca mecburen otostop çekmek için youporn çantasını alarak yol kenarına gelir etekli porno liseli türk kız yol kenarında dururken yanına yaklaşan porno kibar bir gencin onu gideceği yere kadar bırakmak porno izle istemesine çok mutlu olur arabaya bindiklerinde gideceği yer ile porno arabayı kullanan adamın gittiği yer arasında çok mesafe sex izle farkı olduğunu anlayan türk kız bu yaptığı porno indir iyilik karşısında arabada ona memelerini açar porno sapıklaşan adam yol kenarındaki hotelde durarak porno izle üniversiteli otostop çeken türk kızına odada sakso çektirip sikerMaize Starch-g-Poly (Itaconic Acid) and its Application in Sewage Water Treatment and as Antimicrobial Agent| Abstract

44 7460 854 031

All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Abstract

Maize Starch-g-Poly (Itaconic Acid) and its Application in Sewage Water Treatment and as Antimicrobial Agent

Author(s): Magdy W Sabaa, Esraa H Abdel Magid and Riham R Mohamed

Maize starch-g-poly(itaconic acid) was prepared and characterized by determining its degree of substitution and elucidating its structure by FTIR. Graft copolymerization of itaconic acid onto starch was carried out in aqueous solution using potassium persulfate (KPS)/sodium bisulfite (NaBS) initiator. Evidences of grafting were obtained via FTIR spectroscopy and X-ray diffraction before and after grafting. The effects of initiator concentration, monomer concentration, reaction time and temperature on the graft copolymerization were studied by determining the grafting percentage (%G), grafting efficiency (%GE) and the amount of homopolymer formed (%H). The optimum grafting conditions were determined as follows: [(KPS)/ (NaBS)]=6 x 10 -2 (mol.L-1), [M]=1.1 (mol.L-1), reaction temperature=55°C and reaction time=3.75h. The efficacy of the graft copolymers to uptake metal ions from their aqueous solutions was also studied. Results showed that the graft copolymers adsorb more metal ions than starch itself. The graft copolymers were found to have antimicrobial activity against streptococcus pneumonia and Bacillis subtilis as gram-positive and against Escherichia coli as gram-negative bacteria and against Candida albican as fungi.


Share this