Evaluation of secretory activity in carp pancreatocytes (Cyprinus carpio L.) when using lactobacillus-based chelate and probiotic supplemental feed complexes

The experimental research was carried out on the juvenile carp (Cyprinus carpio L.). The impact from supplemental feeds consisting of variable concentrations of chelate compounds, biogenic trace elements and probiotic lactobacillus-based product Bacillus subtilis VKPM B-2335 was evaluated. Optical and qualitative parameters of the lactobacillus base were studied in order to identify the major group of substances potentially able to influence the end result. The purpose of this research was to identify changes in the structure of the zymogen granules and their dimensions at which supplemental feeds produce a stimulating effect on the synthesis of zymogens in exogenous cells of the secretory part of pancreas. At the outcome of the study, for the first time, it was possible to prove that the integrated action of chelates and lactobacillus-based probiotics complemented each other. Metal chelate compounds contributed to enlargement of the zymogen granules, if compared to the control values. The bacterial products accelerated production of the zymogen granules in acinar cells diffusely located in carp hepatopancreas.

COBALT COMPLEXONES BASED ON ENVIRONMENTALLY FRIENDLY COMPLEXONS AS MICRO-ELEMENT FERTILIZERS

Представлены результаты эксперимента по применению созданных хелатных ростостимуляторов на основе экологически безопасных комплексонов для отдельных классов растений. В условиях мелкоделяночного полевого опыта исследовано влияние иминодиянтарной кислоты (ИДЯК), этилендиаминтетрауксусной кислоты (ЭДТУК), хелатных соединений кобальта (II) на их основе: Со-ИДЯК и Со-ЭДТУК, соответственно, на растения фасоли обыкновенной. Обнаружено увеличение содержания хлорофилла и общей массы семян под воздействием ИДЯК и Со-ИДЯК. Из использованных кобальтовых микроудобрений наиболее эффективным оказался комплекс Со-ИДЯК. The results of an experiment on the use of created chelated growth stimulants based on environmentally friendly complexones for certain classes of plants are presented. Under the conditions of a small-plot field experiment, the effect of iminodisuccinic acid (IDS), ethylenediaminetetraacetic acid (EDTA), and chelate compounds of cobalt (II) based on them: Co-IDS and Co-EDTA, respectively, on common bean plants was studied. An increase in the content of chlorophyll and the total mass of seeds was found under the influence of IDS and Co-IDS. Of the cobalt micronutrient fertilizers used, the Co-IDS complex turned out to be the most effective.

The Effect of Chelate Compounds on the Hydration Process of MgO–Al2O3 Phase System under Hydrothermal Conditions

In refractory castables during heat treatment, there is a dynamic change from a hydraulic bond to a ceramic bond. During heating, the emission of water takes place; this changes the conditions inside the material to something similar to the hydrothermal ones. This influences the processes that occur during the heating of the castables, and in consequence, the properties of the final material. The aim of the work was to evaluate the influence of the chelate compounds like citric and tartaric acids, often used in castables as dispersing agents, on the properties of the MgO–Al2O3 phase system during hydrothermal treatment. The performed tests included an XRD analysis, a thermal analysis (TG–DSC–EGA), infrared spectroscopy (FTIR), and an SEM–EDS analysis. Based on the obtained results, it was found that even small amounts of chelate compounds have a strong impact on the processes under hydrothermal conditions which results in changes in the phase composition of the materials.

New Modeling of AgFeNi2S4-Graphene-TiO2 Ternary Nanocomposite with Chelate Compounds and Its Photocatalytic Reduction of CO2

Herein, we synthesized the chalcogenide-quaternary nanocomposite loaded Graphene-based ternary photocatalyst via a modified solvothermal method. The preparation of quaternary nanocomposite was based on metallic citrate polymerization which used ethylene glycol (C2H6O2) and citric acid (C6H8O7) as chelate cations. The morphology and electrochemical properties of the as-prepared nano-material investigated by using a physical characterization equipment. Each result showed that the ternary photocatalyst was successfully synthesized and showed the low recombination rate of photogenerated electrons and holes, which defined the catalytic activity of the photocatalyst for CO2 evolution into hydrocarbon fuels under light irradiation. In addition, the stability and reusability of the photocatalyst were analyzed by a 6-times cycling test without loss of methanol formation by CO2 evolution. The graphene-based ternary photocatalyst offers a new nanomaterial with a new-model that protects the environment by showing high catalytic activity in reducing CO2 to methanol.