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Antibiotic nanocomposite polymers show great promise in treating a variety of pathogens that cause widespread disease. Sodium alginate-grafted diphenylamine (NaAlg-g-DPA) embedded with different ratios of silver nanoparticles (AgNPs) was fabricated and characterized through different techniques including FTIR, XRD, and SEM techniques for investigating the antimicrobial activity. XRD confirmed the crystallinity of these compounds, and the average crystal size of Na Alg-g-DPA/Ag was estimated to be 48.6 nm. Then it was applied as an antimicrobial agent and evaluated through two ways (inhibition zone and MIC techniques) against Staphylococcus aureus as gram-positive bacteria with an inhibition zone of 19.31.6 mm and 18.60.63 mm against Escherichia coli as gram-negative bacteria while with increasing the Ag ratio 2:1 there was an enhancement in their biological activity to be 21.90.69 mm against Staphylococcus aureus and with an inhibition zone of 21.32.1 mm against Escherichia coli. The outcomes of this investigation are important for the development of new composite materials with antibacterial properties for industrial applications.

Cardiac structure and function in iron deficiency anemia are mainly affected by two competing factors: iron deficiency and increased cardiac output (CO). Anaemia and iron deficiency (ID) are common causes of heart failure, both separately and in combination.The goal of this study is to assess the systolic function of left ventricle in ( IDA )using tissue doppler in pediatrics . Sixty (60) children grouped into two groups,one with IDA and another control group. All candidates were suspected to history taking, full clinical examination ,complete blood count ,iron profile and echocardiographic examination. There was significant difference between cases and controls regarding peak systolic velocity across mitral annulus (SM) using tissue doppler imaging . There was no significant difference in left ventricle (LV) dimentions between cases and controls, The mean value of LVESV in case group was 2.0 ± .28 cm while it was 2.1 ± .3 cm in control P value was (.64) . There was no correlation between HB level or ferritin level and SM or EFThe study revealed preserved LV systolic functions as detected by conventional echocardiography however tissue Doppler imaging technique had shown latent LV systolic dysfunction Further follow up is needed for cases to assess reversability of finding .