The Theoretical Description for Chlorantraniliprole Electrochemical Determination, Assisted by Squaraine Dye – Nano-CuS Composite

The theoretical description for the chlorantraniliprole electrochemical determination, assisted by the hybrid composite of squaraine dye with CuS nanoparticles has been described. The correspondent reaction mechanism has been proposed, and the correspondent mathematical model has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has been shown that the chlorantraniprole electrochemical anodical determination on high potential may be efficiently provided by cupper sulfide nanoparticles, stabilized by the squaraine dye. On the other hand, the oscillatory and monotonic instability is also possible, being caused by DEL influences of the electrochemical stage. DOI: http://dx.doi.org/10.17807/orbital.v13i3.151

Research of the synthesis of radiant intensity indicatrix of multi-component beam diode module

Research of the synthesis of radiant intensity indicatrix of multi-component beam diode module / Ruslan Yakovliev, Yurii Shmelov, Maryna Petchenko and ect. // E3S: Web of Conferences: Vol. 280: Second International Conference on Sustainable Futures: Environmental, Technological, Social and Economic Matters (ICSF 2021) (Kryvyi Rih, Ukraine, 19-21 May 2021). - DOI : https://doi.org/10.1051/e3sconf/202128005010 .Широке використання напівпровідникових джерел випромінювання в оптико-лектронних приладах різного призначення потребує подальшого вивчення механізмів формування фотометричних характеристик інтегрованого приладу в зоні ближнього освітлення, де порушується закон перевернутих квадратів. Запропоновано математичну модель багатокомпонентного пучково-діодного модуля. На його основі проведено аналіз впливу параметрів окремих джерел променя на деформацію індикатора інтенсивності випромінювання при переході з дальньої зони в ближню. Показано, що визначальним параметром зміни індикатриси довготи та полярної відстані є розподіл у площині модуля добутку інтенсивності випромінювання окремого діода на його полярний радіус-вектор. Зміщення полярного кута максимуму вектора інтенсивності діодного випромінювання є більш значним для широких діаграм діаграми випромінювання, ніж для зосереджених. Для конкретних параметрів діодів та геометрії їх розташування показано придатність запропонованої моделі для апріорного моделювання променевих діодних модулів.Widespread use of semiconductor radiation sources in optoelectronic devices for various purposes requires further study of the mechanisms of formation of photometric characteristics of the integrated device in the near illumination zone, where the law of inverted squares is violated. A mathematical model of the multicomponent beam-diode module is proposed. On its basis the analysis of influence of the parameters of separate beam sources on the deformation of the indicatrix of radiant intensity at transition from the far zone to the near one is carried out. It is shown that the determining parameter of the indicatrix change in longitude and polar distance is the distribution in the plane of the modulus of the product of the radiant intensity of a single diode on its polar radius vector. The displacement of the polar angle of the maximum of the vector of the diode radiant intensity is more significant for wide radiation patterns than for concentrated ones. For specific parameters of diodes and geometry of their location the suitability of the proposed model for a priori modeling of beam-diode modules is illustrated.Широкое использование полупроводниковых источников излучения в оптико-электронных приборах различного назначения требует дальнейшего изучения механизмов формирования фотометрических характеристик встроенного прибора в зоне ближнего освещения, где нарушается закон перевёрнутых квадратов. Предложена математическая модель многокомпонентного пучково-диодного модуля. На его основе проведён анализ влияния параметров отдельных источников луча на деформацию индикатора интенсивности излучения при переходе из дальней зоны в ближнюю. Показано, что определяющим параметром изменения индикатрисы долготы и расстояния является распределение в плоскости модуля произведения интенсивности излучения отдельного диода на его полярный радиус-вектор. Смещение полярного угла максимума вектора интенсивности диодного излучения более значимо для широких диаграмм диаграммы излучения, чем для сосредоточенных. Для конкретных параметров диодов и геометрии их расположения показана пригодность предлагаемой модели для априорного моделирования лучевых диодных модулей

Theoretical Description for Omeprazole Cathodical Electrochemical Determination, Assisted by Omeprazole Electrochemical Determination, Assisted by the Composite Poly(1,2,4-triazole) – VO(OH)

Abstract: In this work, we describe theoretically the possibility of omeprazole electrochemical determination, assisted by the composite containing vanadium oxyhydroxide as an active substance and the polymer of 1,2,4-triazolic derivative as a mediator. The omeprazole molecule undergoes a sulfoxide to sulfide reduction process over a trivalent vanadium compound. The vanadium oxyhydroxide, at its turn, may be oxidized to a tetravalent state, represented in two forms. The electroanalytical process behavior will be illustrated by a trivariate equation-set, analysis of which confirms the efficiency of the composite of poly (1,2,4-triazole) with VO(OH). Vanadium (III) oxyhydroxide may be efficiently used for omeprazole detection both in pharmaceutical formulations, food, and biological liquids

Acetylcholine Content in Rat Brain Is Elevated by Status Epilepticus Induced by Lithium and Pilocarpine

: The effects of status epilepticus on the concentration, synthesis, release, and subcellular localization of acetylcholine, the concentration of choline, and the activity of acetylcholinesterase in rat brain regions were studied. Generalized convulsive status epilepticus was induced by the administration of pilocarpine to lithium‐treated rats. The concentration of acetylcholine in the cortex, hippocampus, and striatum decreased prior to the onset of spike activity or status epilepticus. Once status epilepticus began, the concentration of acetylcholine increased over time in the cortex and hippocampus, reaching peak levels that were 461% and 304% of control levels, respectively, after 2 h of seizures. Such high in vivo levels of acetylcholine had not been reported previously following any treatment. During status epilepticus, the concentration of acetylcholine in the striatum returned to control levels after the initial depression, but did not accumulate to high levels as it did in the other two regions. The in vivo cortical efflux of acetylcholine was also increased during the seizures. Choline levels were increased by status epilepticus in all three brain regions. Inhibition of seizures by pretreatment with atropine blocked the increases of acetylcholine and choline. Synaptosomes prepared from the cortex and from the hippocampus of rats with status epilepticus had elevated concentrations of acetylcholine: in the hippocampus the acetylcholine was principally in the cytoplasmic fraction, whereas in the cortex the acetylcholine was elevated in both the cytoplasmic and the vesicular fractions. The extra acetylcholine was in a releasable compartment, since increased K+ in the media or ouabain increased the release of acetylcholine from cortical slices to a greater extent in tissue from seized rats than from controls. The activity of acetylcholinesterase was not reduced by status epilepticus. These findings demonstrate that status epilepticus induced by lithium and pilocarpine alters the regulation of acetylcholine synthesis