بحوث سكوبس — حيدر نزار محمود جاووش

Due to its low cost, mild steel is frequently employed as a construction material in many industries. Unfortunately, due to the limited corrosion resistance of mild steel, it should be protected with barrier layers to keep it from corrosion in acidic or basic environments. An N-propionanilide derivative, namely 3-keto-3-((indolin-2-oneylidene)hydrazinyl)-N-propion-anilide (KIHP), was studied as a corrosion inhibitor of mild steel in a hydrochloric acid solution at a temperature of 303 K using gravimetrical measurements and density functional theory (DFT) simulation. The findings demonstrate that KIHP performs well as a mild steel corrosion inhibitor in 1 M HCl, with a greater inhibition efficacy of 95.3 percent for gravimetrical analysis at 0.0005 M KIHP concentration. The gravimetrical measurements at various temperatures (303 K to 333 K) were also studied at 5 hours immersion time. It was found that he protection efficacy decreases as the temperature rises. Based on our findings, we believe that KIHP could efficiently inhibit the acidic damage on a mild surface through physical and chemical adsorption. We computed separately the Gibbs free energy parameter. Quantum chemical simulations at the B3LYP/6-31G* level of theory were also applied to compute some electronic properties of molecules in an effort to see if there was a relationship between the inhibitory action and the structure of KIHP molecule. © 2022, Russian Association of Corrosion Engineers. All rights reserved.

Corrosion is a major economic issue all around the world. Corrosion inhibitors, organic chemicals in particular, are among the most effective ways to protect metal surfaces from corrosion. A Schiff base, namely 2-((mercaptoquinolin-3-yl)methylene)hydrazinecarbothioamide (MQT), was investigated at concentrations ranging from 0.0001 to 0.0005 M as a mild steel corrosion inhibitor in 1.0 M sulfuric acid environment at various temperatures (303, 313, 323, and 333 K). The inhibition efficiency (IE%) of the investigated Schiff base was evaluated using the weight loss technique. The weight loss technique shows that increasing the concentration of the tested inhibitor enhances inhibition efficacy (from 43 to 93%), with the highest protection performance found at a concentration of 0.0005 M. According to the weight loss measurements, the Langmuir isotherm was found to be the best suitable model of adsorption, with negative values of free energy between −20 kJ·mol−1 and −40 kJ·mol−1 suggesting a spontaneous nature of simultaneous physical and chemical adsorption. As a result, the high percent IE of the examined compound was interpreted as substantial adsorption of the organic molecules on the mild steel surface. This resulted in the formation of a shielding layer between the mild steel surface and the acidic environment. Furthermore, all of the chemical descriptors generated from DFT show that the tested inhibitor is well absorbed by mild steel sites. Quantum chemistry computations were used to determine the molecular geometry and electronic structure of the molecule. The energy difference between the HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital) has been checked using a theoretical approach to indicate a chemical reactivity and kinetic stability. Finally, the mechanisms of mild steel corrosion in the H2SO4 environment and prevention of mild steel corrosion by the tested Schiff base were examined. © 2022, Russian Association of Corrosion Engineers. All rights reserved.

Leadership style is a critical factor in achieving success in any field or goal. In sport, it is necessary to consider the complementarity between the coach’s leadership style and sporting satisfaction to achieve team success. In this study, we examine this factor using 194 male football players from public university teams. The research methodology aims to examine the multidimensional model of leadership style to understand the relationship between the five types of leadership styles training and instructions, social support, positive feedback, democratic leadership and autocratic leadership and athletes’ satisfaction. Both aspects were captured through (i) the Leadership Scale of sports to assess leadership style and (ii) the Athlete Satisfaction Questionnaire to assess athlete satisfaction. SPSS was used in statistical analysis of data. From the correlation results, the relationships between all facets of leadership style (training and instruction, autocratic style, democratic style, social support, and positive feedback) and athlete satisfaction are significant. Furthermore, multiple regression analysis found that autocratic leadership was negatively associated with athlete satisfaction. In contrast, a positive relationship was found for the styles of training and guidance, democratic leadership, social support and positive feedback. The relationship between the coaches’ leadership style and the athletes’ satisfaction is underlined by the results of this research. The leadership style practised by the coach, with which the athletes are satisfied, achieves the desired goal of promoting quality education. © 2022 by authors, all rights reserved.

The psychological factors that affect any person in one way or another, whether on the pattern of his behavior or the level of his achievement. Since psychological anxiety is currently considered one of the important elements that may affect the level of achievement of athletes, the researcher found that there is a need to know the relationship between anxiety and achievement for the 100-meter effectiveness. And the research objective recognizing the relationship between psychological anxiety and achievement for the Baghdad University team in the arena and the field for the 100-meter event, The research community included (20) players, (15) players were selected from among them to represent the research community, after deporting (5) as an pilot sample.After collecting and extracting the data, it was processed statistically to reach the most important conclusions: The greater the physical and psychological preparation of the athlete, the more anxiety turns into a positive influence that works to produce greater energy and achieve the goal © 2022, Journal for ReAttach Therapy and Developmental Diversities.All Rights Reserved.

This study aimed to examine the function of health awareness meditation in health card live narrative, health communication, health awareness programs, and healthy living culture among Iraqi medical college students. For this objective, data was collected using a self-administered questionnaire and a suitable sample approach from medical students attending medical colleges in the public sector in Iraq and utilized a quantitative research strategy, a cross-sectional study design, and the Partial Least Square (PLS)-Structural Equation Modeling (SEM) method. The PLS-SEM results reveal that health life card stories positively and statistically significantly impact health life culture and health consciousness. The health awareness program has beneficial and substantial effects on the living culture and health consciousness. On the other hand, health communication positively and significantly impacts the healthy living culture and health consciousness. Moreover, health consciousness has a good and important impact on healthy culture. Additional indirect impact results reveal that health awareness mediators considerably and positively the association between health life narrative, health awareness, health communication, and health life culture. Based on the findings, this study is regarded as a pioneering study that produced valuable results that might assist future researchers in conducting their studies. This research might also assist policymakers and medical college professors in understanding the significance of health activities in enhancing people's standard of life. © 2022, Universidad Autonoma de Madrid y CV Ciencias del Deporte. All rights reserved.