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Articles by Jaleel Kareem Ahmed
Total Records ( 2 ) for Jaleel Kareem Ahmed
  Jaleel Kareem Ahmed , Nizar Jawad Hadi and Salah Mahdi Abdullah
  Composite films of Poly (Methyl Methacrylate) (PMMA)/SiO2-ZnO-Ch are prepared by casting method and evaluated for medical application. Nano silica was prepared from water glass by precipitation method, chlorophyll (Bio natural pigment) extraction from medicago sativa and use as plasticizer. In this study, nano silica and nano zinc oxide are used as filler to improve the biological and mechanical properties of composite films. Where nano silica has good mechanical properties and nano zinc oxide has excellent antibacterial activity (SiO2-ZnO and Ch) are used with a following percentages (1-3) wt.% to the polymer. Many tests are carried on composite films such as antibacterial activity, Fourier Transform Infrared spectroscopy (FTIR) and tensile test. The result shown that zinc oxide has excellent antibacterial activity. And its activity in composite films increasing with increasing its concentration.
  Jaleel Kareem Ahmed , ZuhairJabbar Abdul Ameer and Shaden Abdullah Hamza
  This study deals with pure Iraqi red beet juice which is extracted mechanically into two states, the pure anthocyanin juice and its solid state obtained by evaporation the pure anthocyanin juice until obtained the pure solid anthocyanin. By boiling the juice at 102°C and heating the solid at 110°C both of them show dimerization product which are confirmed from the weight of liberated water and the degree of polymerization is 2 (dimer formation).The pure solid anthocyanin and dimer anthocyanin (by heating and boiling) added to biopolymers (poly vinyl alcohol, poly methyl methacrylate, starch and cellulose)and noticed that this pigment effected on the glass transition temperature, density and hardness of biopolymers.
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