FLOTATION KINETICS OF MAGNESIUM HYDROXIDE SEDIMENTED FROM SEA WATER

Synthetic sea water has been taken as a referential sample, in which Mg(OH)2 had been sedimented, in order to reduce biological effects and confirm reproducibility of results of the familiar composition sample. The synthetic sea water was prepared according to the scientifically developed procedure. Flotation experiments were performed in the apparatus for flotation under pressure and recoveries of floated Mg(OH)2 were determined depending on the time of flotation. The results obtained on the referential sample of the synthetic water were also tested on the sample of natural sea water and presented comparatively during work. Flotation kinetics is in most cases described by an equation of the first or second degree. However, it was established that flotation kinetics of Mg(OH)2 as chemical sediment with both types of prepared magnesium hydroxide suspension, sedimented in both the synthetic and natural sea water corresponded to the velocity of reaction n = 1.5 degree, which fully corresponds to Horst Morris’s theoretical postulates in the theory of flotation kinetics

FLOTATION KINETICS OF MAGNESIUM HYDROXIDE SEDIMENTED FROM SEA WATER

Synthetic sea water has been taken as a referential sample, in which Mg(OH)2 had been sedimented, in order to reduce biological effects and confirm reproducibility of results of the familiar composition sample. The synthetic sea water was prepared according to the scientifically developed procedure. Flotation experiments were performed in the apparatus for flotation under pressure and recoveries of floated Mg(OH)2 were determined depending on the time of flotation. The results obtained on the referential sample of the synthetic water were also tested on the sample of natural sea water and presented comparatively during work. Flotation kinetics is in most cases described by an equation of the first or second degree. However, it was established that flotation kinetics of Mg(OH)2 as chemical sediment with both types of prepared magnesium hydroxide suspension, sedimented in both the synthetic and natural sea water corresponded to the velocity of reaction n = 1.5 degree, which fully corresponds to Horst Morris’s theoretical postulates in the theory of flotation kinetics

Supplementary data for article: Vasić, V.; Gašić, U.; Stanković, D.; Lušić, D.; Vukić-Lušić, D.; Milojković-Opsenica, D.; Tešić, Ž.; Trifković, J. Towards Better Quality Criteria of European Honeydew Honey: Phenolic Profile and Antioxidant Capacity. Food Chemistry 2019, 274, 629–641. https://doi.org/10.1016/j.foodchem.2018.09.045

Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/2917]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2235]Supplementary material for: [https://www.sciencedirect.com/science/article/pii/S0308814618316169?via%3Dihub

Supplementary data for article: Vasić, V.; Gašić, U.; Stanković, D.; Lušić, D.; Vukić-Lušić, D.; Milojković-Opsenica, D.; Tešić, Ž.; Trifković, J. Towards Better Quality Criteria of European Honeydew Honey: Phenolic Profile and Antioxidant Capacity. Food Chemistry 2019, 274, 629–641. https://doi.org/10.1016/j.foodchem.2018.09.045

Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/2917]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2235]Supplementary material for: [https://www.sciencedirect.com/science/article/pii/S0308814618316169?via%3Dihub

Memory for expectation-violating concepts:The effects of agents and cultural familiarity

Previous research has shown that ideas which violate our expectations, such as schema-inconsistent concepts, enjoy privileged status in terms of memorability. In our study, memory for concepts that violate cultural (cultural schema-level) expectations (e.g., "illiterate teacher", "wooden bottle", or "thorny grass") versus domain-level (ontological) expectations (e.g., "speaking cat", "jumping maple", or "melting teacher") was examined. Concepts that violate cultural expectations, or counter-schematic, were remembered to a greater extent compared with concepts that violate ontological expectations and with intuitive concepts (e.g., "galloping pony", "drying orchid", or "convertible car"), in both immediate recall, and delayed recognition tests. Importantly, concepts related to agents showed a memory advantage over concepts not pertaining to agents, but this was true only for expectation-violating concepts. Our results imply that intuitive, everyday concepts are equally attractive and memorable regardless of the presence or absence of agents. However, concepts that violate our expectations (cultural-schema or domain-level) are more memorable when pertaining to agents (humans and animals) than to non-agents (plants or objects/artifacts). We conclude that due to their evolutionary salience, cultural ideas which combine expectancy violations and the involvement of an agent are especially memorable and thus have an enhanced probability of being successfully propagated. © 2014 Porubanova et al

Inappropriate stereotypical inferences? An adversarial collaboration in experimental ordinary language philosophy

This paper trials new experimental methods for the analysis of natural language reasoning and the (re)development of critical ordinary language philosophy in the wake of J.L. Austin. Philosophical arguments and thought experiments are strongly shaped by default pragmatic inferences, including stereotypical inferences. Austin suggested that contextually inappropriate stereotypical inferences are at the root of some philosophical paradoxes and problems, and that these can be resolved by exposing those verbal fallacies. This paper builds on recent efforts to empirically document inappropriate stereotypical inferences that may drive philosophical arguments. We demonstrate that previously employed questionnaire-based output measures do not suffice to exclude relevant confounds. We then report an experiment that combines reading time measurements with plausibility ratings. The study seeks to provide evidence of inappropriate stereotypical inferences from appearance verbs that have been suggested to lie at the root of the influential ‘argument from illusion’. Our findings support a diagnostic reconstruction of this argument. They provide the missing component for proof of concept for an experimental implementation of critical ordinary language philosophy that is in line with the ambitions of current ‘evidential’ experimental philosophy

SULFIDE OXIDATION IN TANNERY WASTEWATER WITH H2O2

High concentrations of sulfide in (cumulative) tannery wastewater are the direct cause of very high toxicity of this effluent. Therefore it is necessary to remove this pollutant by the oxidation process. Hydrogen-peroxide is the oxidizing agent, which increasingly acts as an "environment friendly" due to multiple uses for purification, detoxification and removal of odors from wastewater and waste gases. Wastewater treatment with H2O2 can be used as a separate procedure, or as an improvement of an existing mechanical or biological treatment processes. In conducted research, H2O2 was used for the oxidation of sulfide in samples of cumulative wastewater from processing of leather, after completion of gravitational sedimentation. The following parameters were varied: the concentration of H2O2, oxidation temperature and oxidation time. The achieved degree of oxidation of sulfide was 87,9-99,6 % at temperature t = 22 °C, with simultaneous reduction of COD values of 25-35 %. Verification of successful treatment of wastewater by hydrogen-peroxide was confirmed by toxicity tests on Daphnia magna. The results, expressed as 24-96hLC50, showed a significant decrease in toxicity, respectively treated wastewater was 100 times less toxic than the initial water samples. Key words

Reactions with lead tetraacetate. I. Oxidation of saturated aliphatic alcohols. Part 1

It was recently shown that various steroid alcohols could react with lead tetraacetate in non-polar solvents to give tetrahydrofuran and tetrahydropyran derivatives. cyclization occurring when the position of and the distance between the reacting hydroxyl group and the 8 - or d -methyl, methylene or methine group were favourable to ring closure

Reactions with lead tetraacetate. I. Oxidation of saturated aliphatic alcohols. Part 1

It was recently shown that various steroid alcohols could react with lead tetraacetate in non-polar solvents to give tetrahydrofuran and tetrahydropyran derivatives. cyclization occurring when the position of and the distance between the reacting hydroxyl group and the 8 - or d -methyl, methylene or methine group were favourable to ring closure

Numerical investigation on the convective heat transfer in a spiral coil with radiant heating

The objective of this study was to numerically investigate the heat transfer in spiral coil tube in the laminar, transitional, and turbulent flow regimes. The Archimedean spiral coil was exposed to radiant heating and should represent heat absorber of parabolic dish solar concentrator. Specific boundary conditions represent the uniqueness of this study, since the heat flux upon the tube external surfaces varies not only in the circumferential direction, but also in the axial direction. The curvature ratio of spiral coil varies from 0.029 at the flow inlet to 0.234 at the flow outlet, while the heat transfer fluid is water. The 3-D steady-state transport equations were solved using the Reynolds stress turbulence model. Results showed that secondary flows strongly affect the flow and that the heat transfer is strongly asymmetric, with higher values near the outer wall of spiral. Although overall turbulence levels were lower than in a straight pipe, heat transfer rates were larger due to the curvature-induced modifications of the mean flow and temperature fields. [Projekat Ministarstva nauke Republike Srbije, br. 42006