the present work investigated the preparation of biodegradable beads with alginate polymer by ionotropic gelation method to improve the control release properties of the antibiotic rifampicin. ionotropic gelation method was applied to prepare beads using calcium chloride (cacl2) as cationic component and alginate as an anionic component. in this method, adding 0.5% w/v polyvinyl alcohol (pva) t...

a total of 116 marine fishes and sediments were collected from persian gulf shore near bushehr in order to isolate vibrio species. after culturing on thiosulphate- cirate- bile salts- sucrose and with biochemical tests, 30 isolates showed vibrio characteristics which were categorized in 7 vibrio species, v. anguillarum, v. alginalyticus, v. harveyi, v. vulnfiicus, v. ordalii, v. carchariae and ...

In this study, Polyaniline molecule (emeraldine base) is modeled as a molecular wire and the effects of the metal/molecule coupling strength and the molecule length on the current-voltage (I-V) characteristics are numerically investigated. Using a tight-binding Hamiltonian model, the methods based on Non-equilibrium Green’s function theory, Landauer formalism and Newns-Anderson model, our calcu...

I give several simple examples of model Langmuir probe current-voltage I-V characteristics that help students learn how to interpret real I-V characteristics obtained in a plasma. Students can also create their own Langmuir probe I-V characteristics using a program with the plasma density, plasma potential, electron temperature, ion temperature, and probe area as input parameters. Some examples...

Even if SiC MOSFETs technology has undergone huge progress in last years, there are some issues still open, such as high traps density at the SiO 2 /SiC interface. This work focuses on measurement of Gate capacitance when a DC bias is applied between Drain and Source to characterize The experimental curves, performed commercial power MOSFET, exhibit peak voltage approaches threshold voltage. Su...