Online ISSN: 2515-8260

Keywords : nickel

Photovoltaic Effect In Silicon With Schottky Micro-Barriers Created On The Basis Of Nickel Impurity Atoms And Spectral Characteristics

E.B. Saitov; N.F. Zikrillayev

European Journal of Molecular & Clinical Medicine, 2021, Volume 8, Issue 1, Pages 982-992

The paper shows the possibility of self-organization of microparticles of impurity nickel atoms in silicon under certain thermodynamic conditions. It was found that the concentration of microparticles in the volume is distributed almost uniformly. It was found that upon additional annealing, self-ordering of microparticles of impurity atoms in the silicon bulk and the formation of Schottky micro-barriers occur. The study of the I – V characteristics of these samples showed that at the points where the microscopy of nickel atoms formed, it has a diode character. The obtained experimental data show the possibility of creating photocells (PV) based on compensated silicon by the impurity of nickel atoms. To study the fundamental electrophysical parameters of photocells, modern methods and instruments were used, such as an MIC-5 infrared analysis microscope, Oxford Instruments ZEISS EVOMA 10 REM analysis, XIA-200 atomic force microscope, and X'PertPowder diffractometer. Micro- and nanoclusters found in silicon are explained by the accumulation of concentration of nickel atom clusters. It has been established that the overgrown clusters of impurity nickel atoms lead to an improvement in the electrophysical parameters of photocells.


N.A. Matkarimova; N.A. Parpiev; Sh.A. Kodirova; Sh.B. Hasanov

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 2, Pages 1039-1043

The article describes the conditions for the synthesis of 2-mercaptothiazoline, 2-mercaptobenzothiazole and thiamine hydrochloride complexes with Cu (II), Ni (II), and Co (II) salts. If the composition of synthesized compounds was determined using elemental analysis, the proof of identity was performed by determining the liquefaction temperatures. The coordination centers of ligands, the dentate of the central atom, were determined based on IR spectra.
As a result of the studies, it was found that thiazoles are connected by nitrogen and sulfur atoms in the heterocycle, in promissory notes formed by intermediate metals. In this regard, it is observed upon the transition of the hydrogen atom of the S-H group to a metal atom.

Release Of Nickel And Chromium Ions From Orthodontic Wires Following The Use Of Teeth Whitening Mouthwashes: An Original Research

Dr. Ramya Alla; Dr. Garlapati Yugandhar; Dr. Kolasani sirinivasa Rao; Dr. Aparna Kadiveti; Dr. Lakshmikar Reddy Obili Govindugari; Dr. Saritha Kattulapalle

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 6540-6545

Aim: Purpose of our research is to study the release of nickel as well as chromium ions from orthodontic wires in patients who are using teeth whitening mouthwashes.Methodology: In vitro, experimental study was carried out on 50 orthodontic wires of same length of SS, and NiTi. The samples were immersed in Oral B and Listerine (20 each) for 1, 6, 24, and 168 h. 10 samples immersed in distilled water served as the control group. Atomic absorption spectroscopy served to compute the number of released ions.Results: Nickel ions were released from both wires at all time-points; the highest amount was in Listerine and the lowest in Oral B mouthwashes. The process of release of chromium from the SS wire was the same as that of nickel. However, the release trend in NiTi wires was not uniform.Conclusion: Listerine caused the highest release of ions. Oral B showed the lowest amount of ion release.