International Journal Of Bio-Inorganic Hybrid Nanomaterials
Volume:11 Issue: 1, Spring 2022

In this research, the performance of Carbone nanotubes (CNT) as a sensing material and adsorbent for the detection and removal of Amoxicillin was investigated. at the first, the structures of Amoxicillin and CNT were optimized with Gaussian program. Then, using the molecular docking strategy and its grading system, they were computed the arrangement of 10 structures with more negative binding energy than other . Finally, for the best arrangement of Amoxicillin with CNT, molecular orbitals evaluations and depedents parameters , binding energy and other thermodynamic parameters evaluated, the results indicated that the adsorption of Amoxicillin antibiotic on CNT was an exothermic. This procedure was carried out at 298 K and 1 atm. Finally, the QTAIM calculations were performed to evaluate the type of interaction and bonds created between amoxicillin and CNT.

Due to the resistance of Escherichia coli to environmental conditions and its high density in food, which indicates the unfavorable health status of food preparation and distribution centers, the count of Escherichia coli in poultry meat and compliance with the existing standards, including routine work it is a laboratory. On the other hand, the speed of achieving results as soon as possible is one of the special points to be considered in order to ensure the quality of the product. Therefore, based on this issue, the use of impedance technique was considered as a new method in assessing the presence of Escherichia coli in chicken meat, which allows less time to achieve results faster. In this study, four samples of raw chicken, processed chicken, grilled heated chicken and oven-heated chicken with two reference and impedance methods were used to separate Escherichia coli. The impedance technique was performed based on recording the results every ten minutes from measuring the electrical resistance changes of the liquid culture medium (M-Value) used in this method. Then, using SPSS software, the compatibility of the two methods was compared. By comparing these two methods with each other, it was shown that there was no significant difference between the results of these two methods in investigating the presence of Escherichia coli in these samples. According to the results obtained in terms of the importance of obtaining results as soon as possible in food quality control tests, the use of new techniques such as impedance method in the food industry can be used as an alternative to conventional methods.

The paper is focused on the formation of Cadmium sulfide (CdS) nanoparticles in polyelectrolyte-modified microemulsions, in a microemulsion template phase consisting of cyclohexane, water, cationic surfactant and cosurfactant, in the presence of Na-polyacrylate (PAA) as an anionic polyelectrolyte. It is shown that PAA can be incorporated into the individual inverse microemulsion droplets. The PAA-filled microemulsion droplets can be successfully used as a template phase for the rice-like CdS nanoparticles formation. Formation of CdS at room temperature was confirmed by X-ray diffraction (XRD). Size and morphology of CdS samples were characterized using transmission electron microscopy (TEM).

The mechanical and tribological properties play a vital role in the production of the microelectronic device because the long-term stability of the device depends on them. In the present research, the structural, electrical, mechanical, and tribological characteristics of Ta2N thin films were studied for the development of microelectronic devices. The samples were grown by DC reactive magnetron sputtering technique on (400)-oriented Si and SiO2/Si substrates at different thicknesses (80-200 nm). X-ray diffraction technique was used to identify the phase and crystallographic structure while the electrical behavior was investigated by a four-point probe instrument. Nanoindentation and scratch tests were also employed to study the mechanical and tribological characteristics, respectively. All samples represented decent irreversibility of resistivity. A decrease in the film thickness increased the resistivity and developed the nano-strain in the film structure. A decrease in film thickness also improved the hardness as well as resistance to wear and abrasion damage of the samples. The investigations showed that the mentioned behaviors were due to the reduction of crystallite size which in turn caused a denser structure.

A UV-Vis spectrophotometric method for the determination of eriochrome black T (EBT) after adsorption of synthesis 2-aminopyridine/graphene oxide nano-plates has been developed. The nanocomposite was used to remove eriochrome black T (EBT) from the aqueous solution. The effects of pH, adsorption time, initial concentration of EBT, dose, and temperatures were studied. Applying a facile and accessible sample preparation method is highly important before the experimental analysis process. In the current study, a technique was introduced for preconcentration and analysis of trace amounts of EBT in water samples. The important parameters in the analytical procedure of EBT were optimized such as the pH of extraction, amount and type of elution solvent, time of extraction, and the effect of another ion. Analytical parameters such as the concentration factor, the limit of detection (LOD) of the technique, and relative standard deviation (RSD %) were achieved as 25, 15.0 μg L-1, and 2.7%, respectively.

Quantitative structure-activity relationship (QSAR) of the Biological and chemical properties of water in the Anzali International Wetland was estimated by means of multiple linear regression (MLR), artificial neural network (ANN), simulated annealing (SA) and genetic algorithm (GA) techniques. The obtained results from MLR-MLR, MLR-SA, SA-ANN and GA-ANN approaches were compared and GA-ANN combination showed the best performance according to its correlation coefficient (R2) and mean sum square errors (RMSE). A high predictive ability was observed for the GA-ANN model; with the root mean sum square errors (RMSE) of 0.0054 in P. hammoniensis and 0.0020 in B. sowerbyi and 0.001 in O. serpentina, respectively. From GA-ANN simulations, it was found that the total soluble solids (TSS), dissolved oxygen (DO), total nitrogen (TN), NH3 concentration, Sodum chloride (Sali), Nitrat (NO3), Total dissolved solids (TDS), total organic material (TOM), are the most important Biological and chemical parameters of water that affect abundance of the P. hammoniensis, O. serpentin, B. sowerbyi.