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9 pages, 645 KiB

Open AccessProceeding Paper

An Evaluation of the Inhibitory Effect of Dandelion Root Extract in a HCl Solution by Statistical Analysis

by Nebojša Vasiljević, Marija Mitrović, Regina Fuchs-Godec, Dragan Tošković and Milorad Tomić

Eng. Proc. 2025, 99(1), 1; https://doi.org/10.3390/engproc2025099001 - 9 Jun 2025

Abstract

In this paper, the influence of steel type, inhibitor concentration, and time on the inhibitory effect of dandelion root extract in a 4% HCl solution was investigated. Two types of steel of known composition were used, and the inhibitory effect was monitored in a time interval of 2, 4, 6, 24, and 48 h. Dandelion root extract was obtained by the Soxhlet method with 96% ethanol, and then dilutions (0.5 g/L, 1.0 g/L, and 1.5 g/L) were made from the obtained extract in a 4% HCl solution. The optimization of the experimentally obtained results was performed using MINITAB 21 software. The optimal concentration of dandelion roots in the 4% HCl solution in terms of the inhibitory effect is 1.5 g/L, while time has no great influence on the inhibitory effect because the beneficial effect was already achieved after 2 h. In addition, better inhibition efficiency was observed in steel type 1. Full article

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6 pages, 720 KiB

Open AccessProceeding Paper

An Overview of Certified ISO 45001 OH&S Systems in the Regional Context

by Željko Đurić, Nataša Cvijanović, Duško Kostić, Mitar Perušić, Jelena Vuković and Nebojša Vasiljević

Eng. Proc. 2025, 99(1), 2; https://doi.org/10.3390/engproc2025099002 - 9 Jun 2025

Abstract

Occupational health and safety (OH&S) and other management systems are crucial in enhancing the operational activities of organizations in regional countries improving their public image and ensuring safety. Despite the evident advantages, the practical implementation and integration of these systems frequently present substantial challenges. These challenges can significantly influence an organization’s decision to set up and certify integrated or particular management systems. This study provides a comprehensive analysis of the general concept, current status, and quantitative evaluation of organizations that have implemented certified OH&S management systems within the region. The analysis utilizes the most recent data released by the International Organization for Standardization (ISO), which includes wider statistics on the number, types, and trends of certified systems in the region. Based on this analysis, this paper offers well-informed observations, conclusions, and recommendations aimed at improving the current state and general measures to enhance OH&S in the regional context. Full article

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8 pages, 193 KiB

Open AccessProceeding Paper

Analysis of Gluten Protein After Replacing Some of the Wheat Flour with Amaranth Flour in Muffins

by Vesna Gojković Cvjetković, Dragana Škuletić, Željka Marjanović-Balaban, Danijela Rajić, Milan Vukić, Milenko Smiljanić and Dragan Vujadinović

Eng. Proc. 2025, 99(1), 3; https://doi.org/10.3390/engproc2025099003 - 9 Jun 2025

Abstract

Amaranth belongs to the pseudocereal group. This pseudocereal does not contain gluten, and is suitable for a gluten-free diet. This paper aimed to examine how the partial replacement of wheat flour with amaranth in muffins at different ratios and with different storage times affects gluten proteins. Gluten protein separation was performed by reverse-phase high-pressure liquid chromatography (RP-HPLC). Based on the obtained results, the greatest total quantity of gliadin protein was obtained from muffin samples made from 100% wheat flour and stored for 4 weeks (Xav = 20.33), and the least from muffins made from 50% wheat flour and 50% amaranth and stored for 0 weeks (Xav = 12.00). The greatest total quantity of glutenin protein was obtained from muffin samples made from 100% wheat flour and stored for 4 weeks (Xav = 26.67), and the least from 25% wheat flour and 75% amaranth and stored for 0 weeks (Xav = 17.33). Full article

289 KiB

Open AccessProceeding Paper

A Preliminary Assessment of the Use of Red Mud Slag for Phosphate Sorption from Aqueous Solutions

by Jelena Vuković, Slavko N. Smiljanić, Duško Kostić, Srećko Stopić, Mitar Perušić and Nebojša Vasiljević

Eng. Proc. 2025, 99(1), 5; https://doi.org/10.3390/engproc2025099005 - 9 Jun 2025

Abstract

This paper shows the preliminary results of an investigation into the possibility of using red mud slag (RMS) for phosphate sorption from aqueous solutions. The red mud slag was obtained from red mud treatment, specifically from carbothermal reduction at high temperatures. This process resulted in forming a metallic phase (iron) and slag enriched with other elements. The preliminary analysis of slag is performed to investigate its potential for use as a phosphate sorbent in wastewater treatment. The slag is divided into three categories. Two of them are obtained by sieving an original slag sample in the fine fraction and the coarse fraction (the slag residual after sieving). The third sample is the raw slag. After an experiment that included 24 h shaking of slag and phosphate solution, the results show potential for using red mud slag in phosphate sorption. It is an initial experiment that will be a starting point for further investigation of the sorption characteristics of red mud slag. Full article

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