graphene modified glassy carbon electrodes have been developed for the determination of calcium dobesilate in pharmaceutical formulations. the prepared graphene and cnts were used as a conductive substrate for electrochemical study of calcium dobesilate. the direct electrochemistry of calcium dobesilate showed a reversible cyclic voltammogram with a formal potential of 133 mv (vs. ag/agcl) for ...

using the computational methods, the interaction effect of tyrosine amino acid on graphene wasinvestigated. for this purpose, the density functional theory (dft) in the ground state of 6-31gwas used, and the interaction effects of tyrosine on graphene was investigated through attachmentto three different base positions. different parameters such as energy levels, the amount ofchemical shift in ...

Reduced graphene oxide (RGO) is an electronically hybrid material that displays remarkable chemical sensing properties. Here, we present a quantitative analysis of the chemical gating effects in RGO-based chemical sensors. The gas sensing devices are patterned in a field-effect transistor geometry, by dielectrophoretic assembly of RGO platelets between gold electrodes deposited on SiO2/Si subst...

Natural nacre, which consists of almost 95 vol% inorganic content (calcium carbonate) and 5 vol% elastic biopolymers, possesses a unique combination of remarkable strength and toughness, which is attributed to its hierarchical nano-/ microscale structure and precise inorganic–organic interface. Inspired by the intrinsic relationship between the structures and the mechanical properties lying in ...

introduction: in this study the evaluation of a platelet-based maximum penalized likelihood estimation (mple) for denoising spect images was performed and compared with other denoising methods such as wavelets or butterworth filtration. platelet-based mple factorization as a multiscale decomposition approach has been already proposed for better edges and surfaces representation due to poisson n...

conclusions helicobacter pylori infection has a significant effect on platelet count in patients with citp and h. pylori eradication therapy should be considered as an important factor in platelet count recovery in citp patients. results from a total of 23 patients with citp, 43% (10) of the cases were h. pylori positive and after eradication therapy, eight patients (80%) were successfully trea...

background nonalcoholic fatty liver disease has become a worldwide challenge. liver biopsy remains the single most reliable approach to determine the severity of this disease. as patients with nonalcoholic fatty liver disease require close follow-up, performing this invasive method repeatedly seems impractical; therefore, designing a noninvasive system to follow up patients has become a common ...

Adequate amount of graphene oxide (GO) was firstly prepared by oxidation of graphite and GO/epoxy nanocomposites were subsequently prepared by typical solution mixing technique. X-ray diffraction (XRD) pattern, X-ray photoelectron (XPS), Raman and Fourier transform infrared (FTIR) spectroscopy indicated the successful preparation of GO. Scanning electron microscopy (SEM) and Transmission electr...