Dynamic mechanical analysis was used to study the viscoelastic behavior of nanocomposites consisting thermoplastic corn starch plasticized with glycerol and/or urea and addition 2 or 5 wt. % montmorillonite-type nanofiller. Motional heterogeneity studied materials inferred from temperature dependences damping factor. Relaxation processes in composites only one plasticizer proceeded a similar ma...

In this work, modification of carbon paste electrode surface with poly (2, 5-Dimethyl aniline) (P-2,5-DMA) by using electrochemical polymerization was described. Then, transition metal ions of Ni(II) were incorporated into the polymer film by two ways. At first way, the polymeric modified electrode was immersed in 0.2 M NiSO4 solutions and the second way was carried out by electrodeposition of ...

Dynamic metasurface antennas (DMAs) have great potential to be used in the radiator/receptor elements of future wireless transmitters and receivers, replacing conventional metallic antennas. This can attributed their unique properties, such as ability reconfigured real-time reduce radio frequency chains, resulting low implementation cost. However, Lorentzian constraint associated with DMA poses...

Abstract. Ambient measurements combined with theoretical simulations have shown evidence that the tropospheric degradation end-products of Freon alternatives, trifluoroacetic acid (TFA), one most important and abundant atmospheric organic substances, can enhance nucleation process based on sulfuric (SA) dimethylamine (DMA) in urban environments. However, TFA is widespread all over world under d...

Background Cryopreservation procedure for poultry semen is not reliable due to structural and biochemical damages which can lead to reduction in sperm quality and fertility. Development of cryopreservation medium has crucial effects for successful recovery of sperm after freezing. The objective of this study was assessment of cryopreservation of rooster semen using hand-made cryopreservation me...