Showing papers in "Journal of Fundamental and Applied Sciences in 2021"
TL;DR: In this article, the authors analyze and demonstrate the deficiencies and opportunities of the green landscape in primary schools, Kigali, Rwanda, and identify that the schools face the deficiencies to apply hardscape, softscape, and interaction of the pupils with the green spaces.
Abstract: The aim of this research is to analyze and demonstrate the deficiencies and opportunities of the green landscape in primary schools, Kigali, Rwanda. Despite the recent research on significant positive effects of green spaces on public health such as mental, physical, and social, the landscape design with green elements has less taken into account as a priority in schools. The methodology of this research was based on the qualitative method by applying structured observation, photography, and site analysis techniques. The findings identify that the schools face the deficiencies to apply hardscape, softscape, and interaction of the pupils with the green spaces. Despite the open spaces in the schools for design as great opportunities, the deficiencies of hardscape, softscape, and limited accessibility of the pupils to the green spaces could influence the general health of the users.
4 citations
TL;DR: In this article, the authors examined and evaluated the effect of the GR/UGI ratio on UHI mitigation, creating Urban Cool Island (UCI), which is one of the most applied strategies to mitigate urban heat island (UHI) recommended for sustainable cities.
Abstract: Green Roof (GR) is one of the most applied strategies to Mitigate Urban Heat Island (UHI) recommended for sustainable cities. This research aims to examine and evaluate the effect of the GR/UGI ratio on UHI mitigation, creating Urban Cool Island (UCI). The study was carried out at Constantine, situated in the East part of Algeria, characterized by a semi-arid climate with high summer solar radiation intensity. An urban climate analysis was conducted during the hottest period of the year by means of remote sensing data using ArcGIS 10.2 platform. The results displayed that vegetation, urban density, and topography strongly affect UHI. Furthermore, other finding results in this research show that fixing GR/UGI ratio (with 0.0063 reduced the average air temperature by 1.24°C) in a large-scale urban area, can reduce the surface temperature by 4.00 degrees of the studied area.
3 citations
TL;DR: In this article, the authors investigated the microclimatic regulation of palm trees in semi-arid environment during heat stress and found that palm trees as an evergreen type have the lesser micro-climatics regulation and it is not the most suitable type to semi arid environment.
Abstract: Vegetation affects the urban microclimate in different ways, including shading, aspersing the humidity and controlling the wind velocity. In urban areas, microclimatic regulation depends on a number of features such as type and ratio of vegetation. This paper investigates the microclimatic regulation of palm trees in semi-arid environment during heat stress. El Nakhlette Street located in Guelma, Algeria has been selected to conduct the investigation, we measured air temperature, relative humidity and wind velocity during the hottest period of 2019.The study simulates four scenarios of El Nakhlette space in hot season with different ratio and type of vegetation using Envi-met model. The index PMV has been used to measure the heat stress levels. The findings show that palm trees as an evergreen type have the lesser microclimatic regulation and it is not the most suitable type to semi-arid environment.
3 citations
TL;DR: In this paper, three types of activated charcoal were prepared from the seeds of dates and different essays were done for each material prepared (moisture rate and ash, pH, concentration, mass, granulometry).
Abstract: The date industry currently produces thousands of millions of metric tons of waste per year. Hence, there is an urgent need to find suitable applications for this waste which are still largely unused. The aim of this research is to value date waste and its potential application for water treatment. Three types of activated charcoal were prepared from the seeds of dates. Different essays were done for each material prepared (moisture rate and ash, pH, concentration, mass, granulometry). The Materials obtained were characterized by different methods like FTIR and BET. The results obtained indicate that the materials prepared from date seeds are low-cost activated carbon with an effective surface similar to commercial activated carbon which has an important economic advantage through the valuation of these wastes.
2 citations
TL;DR: An unconstrained and contact-based hand geometry verification system, using a combination of length and width of fingers, which outperformed the existing methods with an accuracy of Acc = 98.67%.
Abstract: Biometric systems are widely used in medium and low security applications. Verification systems based on the geometry of the hand utilize some geometrical characteristics of the hand including measurements of fingers, shape of the palm, etc. In this work, we have developed an unconstrained and contact-based hand geometry verification system, using a combination of length and width of fingers. New measurements at different points of fingers were introduced in this paper to improve the performance of the recognition of persons. A total of 135 hand images were enrolled in this study. The Euclidean distance was used as a similarity function for different values of threshold. The proposed method was compared to state-of-the-art approaches. The results obtained reveal the high performance of the proposed approach and outperformed the existing methods with an accuracy of Acc = 98.67%.
2 citations
TL;DR: In this paper, the authors analyzed the potential risks to human health and the GIS for a period of eight years (from 2008 to 2015), which allowed them to the elaboration of waterborne disease mapping of the whole region and to find that the most affected municipalities are: Bouira, Sour El Ghozlene, Lakhdaria and Ain Bessem.
Abstract: Groundwater is often the preferred source for human consumption, irrigation and industry. In Algeria, many people count on well water for their drinking water supply and irrigation of agricultural lands; especially in rural areas, which is a strategic reserve of which quality must be assured. Groundwater protection requires the detection of origins of pollution and its consequences on the ecological system. The region of Bouira has seen water-borne diseases occurrence caused by groundwater pollution, which has led us to look for the origin of this problem. It is considered like a high-risk area because it has recorded a large number of Toxi-food collective, Viral Hepatitis A, typhoid fever and Cholera cases in 2018. The study carried out based on the potential risks to human health and the GIS for a period of eight years (from 2008 to 2015), has allowed us to the elaboration of water-borne disease mapping of the whole region and to find that the most affected municipalities are: Bouira, Sour El Ghozlene, Lakhdaria and Ain Bessem .The correlation between these diseases and the irrigated perimeters by wadis is very strong in this municipalities.
2 citations
SIDI1
TL;DR: The diachronic land use analysis, performed by processing the sensor data, is based on the 10 and 30-year change maps as discussed by the authors, which is followed by the application of the NDVI.
Abstract: The diachronic land use analysis, performed by processing the sensor data, is based on the 10- and 30-year change maps. The dynamics of the vegetation is followed by the application of the NDVI. The gradual and regressive changes in the components of land use reached the rates of 44.78% and -29.21% respectively. The most reduced surfaces are the forest massifs, the steppe area and to a lesser extent the waters of the saline surfaces (dayet). Cereal crops, urban and mineral areas, on the other hand, have increased in area to the detriment of the natural plant cover. The stability of the studied area recorded only a rate of 26.01%. This rate represented only ¼ of the area of the south of Tlemcen region.
1 citations
TL;DR: In this paper, the effects of Guiera senegalensis leaves extract as a potential green corrosion inhibitor for Aluminum (Al) in HCl acid solution was investigated using weight loss, LPR, FT-IR, and scanning electron microscope techniques at varying experimental conditions.
Abstract: The effects of Guiera senegalensis leaves extract as a potential green corrosion inhibitor for Aluminum (Al) in HCl acid solution was investigated using weight loss, LPR, FT-IR, and scanning electron microscope techniques at varying experimental conditions. The result indicates that the percentage inhibition efficiency increases with increase in concentration of the inhibitor and decreased with increase in temperature and immersion period. SEM images showed that the Al metal is protected by the inhibitor molecules, while FT-IR spectra indicates the mechanism of physical adsorption of inhibitors onto Al surface. LPR result showed that the inhibition efficiency of the inhibitor was moderate and act as mixed-type inhibitor. The data obtained from the thermodynamic parameters were fitted into various adsorption isotherms, Freundlich adsorption isotherm was observed to be the best fitted isotherm.
1 citations
TL;DR: In this article, the influence of residential buildings on urban microclimate in the North Est region of Algeria was assessed using the in-situ measurements of different microclimate settings, during summer and winter.
Abstract: The residential open spaces microclimate especially the wind environment, is widely affected by its surrounding buildings. This paper aims to assess the influence of residential buildings on urban microclimate in the North Est region of Algeria. This assessment performed using the in-situ measurements of different microclimate’s settings, during summer and winter. Comparing between two existing city housing blocks, the present study showed that, the higher one results lower temperatures outdoor spaces in winter and summer. Furthermore, the passage under the building improves the accessibility, the ventilation in the inside corner of the city block, but may increase the wind speed so it causes pedestrians discomfort and safety issues.
1 citations
TL;DR: The present study shows the importance of quantum chemical descriptors, constitutional descriptors and hydrophobicity to develop a better QSAR model, whose studied descriptors are LogP, MW, Pol, MR, S, V, HE, DM, EHOMO and ELUMO.
Abstract: In the present study, we explored a series of molecules with anticancer activity, so that qualitative and quantitative studies of the structure-activity relationship (SAR/QSAR) were performed on seventeen theophylline derivatives. These are inhibitors of ALDH1A1. The present study shows the importance of quantum chemical descriptors, constitutional descriptors and hydrophobicity to develop a better QSAR model, whose studied descriptors are LogP, MW, Pol, MR, S, V, HE, DM, EHOMO and ELUMO. A multiple linear regression (MLR) and artificial neural networks (ANN) procedure was used to design the relationships between molecular descriptors and the inhibition of ALDH1A1 by theophylline derivatives. The validation and good quality of the QSAR model are confirmed by a strong correlation between experimental and predicted activity.
1 citations
TL;DR: In this paper, the authors analyse le changement d'affectation des terres et la degradation des ressources naturelles and comprendre par la suite la relation entre les deux processus.
Abstract: L'environnement est lie a l'etalement urbain; il est considere comme la principale menace pour la ville naturelle et la destruction des zones rurales. Le but de cette etude est d'analyser les changements sur la couverture terrestre (tâche urbaine et couverture forestiere) a Annaba, en utilisant des techniques de traitement d'image numerique et des systemes d'information geographique (SIG). Afin d'analyser le changement d'affectation des terres et la degradation des ressources naturelles et de comprendre par la suite la relation entre les deux processus, nous avons cartographie la tache urbaine et le couvert vegetal a l'aide d'images satellite multi- temporelles sur les annees 2000 et 2017. Dans ce cas, apres avoir observe et caracterise les zones alterees par l'expansion urbaine, la modelisation de l'etalement urbain sur le couvert vegetal est realisee par l'indice de vegetation par difference normalisee (NDVI ). Les resultats ont montre que; sur 17 ans; la croissance urbaine d'Annaba diminue le couvert vegetal de 28,50%.
TL;DR: An analytical multiresidue method for the simultaneous determination of various classes of pesticides in vegetables (tomato, pepper, hot pepper and potato) was developed in this article, where vegetables are extracted with acetonitrile with µ-Electron Capture Detection (µ-ECD).
Abstract: An analytical multiresidue method for the simultaneous determination of various classes of pesticides in vegetables (tomato, pepper, hot pepper and potato) was developed Vegetable samples are extracted with acetonitrile
Final determination was made by gas chromatography with µ-Electron Capture Detection (µ-ECD) for organochloride pesticides Organophosphorus, pyrithrinoids and other pesticides analysis was carried out by gas chromatography coupled with mass spectrometry in the selected ion monitoring (SIM) mode The identification of compounds was based on retention time and on comparison of the primary and secondary ions Recovery studies were performed at various fortification levels of each compound and the recoveries obtained ranged from 70% to 127 % with relative standard deviations lower than 8% The method showed good linearity over the range studied and the detection and quantification limits for the pesticides studied varied from 0015 to 0030 µgg-1 and 005 to 01 µgg-1, respectively The proposed method was used to determine pesticides levels in peppers, hot pepper and tomatoes grown in multichapelle greenhouses at Biskra region and potato grown at Setif region in Algeria
TL;DR: In this article, the authors quantified the total flavonoid content and antioxidant properties in the different crude extract of the stem of Solanum nigrum that grow in southern Algeria, and showed that the chloroform extract was the most efficient extract presenting the lowest IC50 values (0.664 mg/mL).
Abstract: The present research aimed to quantify the total flavonoid content and antioxidant properties in the different crude extract of the stem of Solanum nigrum that grow in southern Algeria. The results showed that EtOAc extract showed the highest flavonoid content (18.410±0.023 mg QE/g). The electrochemical behavior of the chloroform, ethyl acetate and n-butanol extracts was studied and indicated that all extracts were electroactive and possess antioxidant activity, chloroform extract showed the highest capacity (9.58±0.010 mg/g). it has been shown that these samples showed scavenging ability on superoxide anion produced by electrochemical reduction of oxygen. The chloroform extract was the most efficient extract presenting the lowest IC50 values (0.664 mg/mL). The binding constant (Kb) of reaction and the change in free energy (ΔG) were calculated.
TL;DR: The study of the improving air navigation at Chlef aerodrome by Implementing a new Instrument Landing System (ILS) is presented, which is based on a general presentation of the airspace, and the existing airport infrastructure.
Abstract: This work presents the study of the improving air navigation at chlef aerodrome by Implementing a new Instrument Landing System (ILS) At present, the radio navigation systems at Chlef aerodrome can handle the air traffic load adequately (air traffic controllers are able to manage the airspace for which they are responsible) Nevertheless, in the very near future the traffic load will become so important that it will require the implementation of an ILS beacon To this reason, we will study the current situation, which is based on a general presentation of Chlef aerodrome (the situation and position of the airspace, and the existing airport infrastructure), followed by the choice of equipment to be installed and the method of implenting the ILS system (composition, technical characteristics and arrangements), in accordance with standards and recommended practices From these results we can find: Implementation of glide path (GP) on the runway 26, implementation of the localizer on the runway 26, setting a new equipment DME The previous systems contribute largely for improving the air navigation at the aerodrome of Chlef
TL;DR: In the plain of Mitidja, in Algeria, the soil is exposed to pollution due particularly to fertilizers and other phytosanitary organisms as discussed by the authors, due to the use of highly nitrogenous chemical fertilizers in agriculture.
Abstract: In Algeria the plain of Mitidja, famous for the fertilization of its soil, on overuse, is exposed to pollution due particularly to fertilizers and other phytosanitary The spatio-temporal distribution of the concentrations of major ions, namely nitrates, would explain the transfer and circulation mechanisms of these elements within groundwater The disparity in nitrate levels shows exposure of the Mitidja aquifer to pollution over its entire extent The geological origin of the high concentrations of nitrates in places cannot alone explain this distribution The levels are higher during recharge and irrigation due to the leaching effect of agricultural soils The use of highly nitrogenous chemical fertilizers in agriculture, compared to the evolution of piezometric levels, causes a significant increase in nitrate concentrations due to their transport from the surface to the aquifer
The subterranean waters of the Quaternary aquifer in the Mitidja show in certain areas concentrations greater than 250 mg / l (Hamiz region in the eastern part of the Mitidja)
This high concentration results mainly from irrigation (market gardening)
TL;DR: This work considers the analysis of three SNP markers (ACP-1, ANTHO3, SOD) located in three different genes to study the genetic diversity of the 17 olive tree cultivars sampled from different Mediterranean regions and finds three clusters which were consistent with the varieties classification.
Abstract: Olive (Olea europaea L.) is one of the oldest agricultural-cultivated trees worldwide; it represents victory, strength, and hope. Indeed, the olive tree plays an important role in the culture and socio-economy of many Mediterranean countries including Tunisia. To study the genetic diversity of the 17 olive tree cultivars (Olea Europaea .L) sampled from different Mediterranean regions, we consider the analysis of three SNP markers (ACP-1, ANTHO3, SOD) located in three different genes. The genotypes of 17 cultivars were revealed using the genotyping analysis. The dendrogram based on cultivars genotypes generated by SNP markers revealed three clusters which were consistent with the varieties classification. In addition, we compared the results obtained with agro-morphological and chemicals data using bioinformatic analyses. This work offers a more relevant clarification of the genetic diversity of the olive cultivars existing in Tunisia.
TL;DR: The main objective of this study is to introduce the design of an autonomy extended electric three-wheeled scooter that contains a powerful electronic differential system to ensure the security of passenger while entering the curved road.
Abstract: The electric scooter has become very popular especially in large European and Asian urban areas, thanks to its some advantages. While its popularity is increasing, studies about these electric scooters are also increasing. The main objective of this study is to introduce the design of an autonomy extended electric three-wheeled scooter. For this aim, a model is obtained firstly and it is driven by two BLDC motors placed on the rear wheels independently controlled by a non-linear controller named as Backstepping. Indeed, it contains a powerful electronic differential system to ensure the security of passenger while entering the curved road. The studied model is simulated through the MATLAB Simulink environment where interesting results are shown in results.
TL;DR: In this article, a comparative analysis based on a series of indices and their confrontation according to the multivariate principal component analysis was performed to evaluate from the view point of urban sprawl, the morphological compactness of the Algerian coastal Bejaia town.
Abstract: Describing the morphological reality of urban areas is essential for any the city’s sustainability project. Through a comparative analysis based on a series of indices and their confrontation according to the multivariate principal component analysis, we have tried to evaluate from the view point of urban sprawl, the morphological compactness of the Algerian coastal Bejaia town. The latter is known to be characterised by physical and natural constraints which influence spatial growth and the process of urban development. The main objective of this article is to establish the macroforms classification that constitute Bejaia city. The configuration analysis’s results of its urban spots have shown an excessive spread of the agglomeration on the Bejaoui coast, which negatively impacts the city’s sustainability.
TL;DR: The results showed that duplex housing has been subject to the application of the strategies in question, and it is deduced that the construction is efficient and that it ensures the comfort of the user and reduces the negative environmental impact.
Abstract: This study aims to evaluate the 50 duplex dwellings of the El Miniawy brothers in M'Sila, using methods of analysis of environmental strategies in order to verify their application by the architects in the construction of these dwellings A duplex dwelling was selected to undertake an analysis using a mixed methodological approach, combining a qualitative and quantitative method, some of whose strategies were evaluated using the EnergyPlus software and validated by in situ measurements The results showed that duplex housing has been subject to the application of the strategies in question We therefore deduce that the construction is efficient and that it ensures the comfort of the user and reduces the negative environmental impact
This study could constitute an alternative for architects, building designers, planners and decision-makers in order to encourage them to adopt these neo-vernacular environmental strategies of El Miniawy in the development of similar projects in M'sila, and to launch other projects with a contemporary vernacular character
TL;DR: In this paper, the effect of foliar spraying of micronutrients (Fe, Zn, Cu, Mn, Mo) on wheat cultivation in a saline and calcareous soil was investigated.
Abstract: The alkaline nature of arid regions soil usually posses a reduction in solubility and assimilability of micronutrient in soil. A study has been carried out to focus-on the effect of foliar spraying of micronutrients (Fe, Zn, Cu, Mn, Mo) on wheat cultivation- in a saline and calcareous soil. The studied growth parameters are : stem length, yield, weight of 1000 seeds and weight of dry matter. According to ANOVA at 5% the following results were obtained : the Zn+Cu 87.67cm, Cu+Mn 83.63cm, Fe+Zn+Cu+Mo 83.53cm treatments exerted the best lengths in succession. For dry matter, the best treatments reported are Zn+Cu+Mo 12396.00Kg/ha, Fe+Mn+Mo11614.67Kg/ha and Fe+Zn+Cu+Mn 11415.67Kg/ha. The results of the weight of 1000 seeds are arranged as follows: Cu+Mo 44.62g was the greatest followed by, Zn+Mo 42.97g, and then by Zn+Cu+Mn+Mo 42.85g. The to pranked treatments in the yield parameter are Fe+Mo 3480.00 Kg/ha, followed by Fe+Zn+Cu+Mn 3451.00 Kg/ha, and then Mn+Mo 3442.20 Kg/ha.
TL;DR: In this paper, the in vitro antibacterial effects of ethanolic and methanolic leaf extracts of M. oleifera on extended-spectrum β-lactamase producing bacteria were evaluated.
Abstract: Extended-spectrum β-lactamase (ESβL) enzymes are produced by certain bacteria as a mechanism of resistance to β-lactam and extended-spectrum β-lactam antibiotics. Previous investigations have confirmed that M. oleifera contains several bioactive compounds. This study aimed at evaluating the in vitro antibacterial effects of ethanolic and methanolic leaf extracts of M. oleifera on extended-spectrum β-lactamase producing bacteria. The leaf extracts of the plant were prepared, screened for bioactive compounds and evaluated for in vitro inhibitory effects against the ESβL-producing bacteria using agar well diffusion method. Different phytochemicals were detected from the extracts. Both methanolic and ethanolic leaf extracts showed a high inhibitory activity, which increased with an increase in concentration, from lowest to highest based on the zones of growth inhibition produced. Amongst the test organisms, Klebsiella pneumoniae was the most sensitive isolate to methanolic extract at 200, 100, 50 and 25 mg/mL followed by Escherichia coli, and then Proteus mirabilis. However, in terms of the ethanolic extract, using the same concentrations as those of methanol extracts, E. coli was found to be the most sensitive isolate followed by K. pneumoniae and then P. mirabilis.
TL;DR: In this article, the authors seek how and by what means to optimize the thermal comfort of the places as very open urban outdoor spaces and existing, with the objective of creating the shadow within these places, that is to say create a mask against the solar rays that cause discomfort and various skin diseases to people.
Abstract: “Outdoor spaces play a very important role in promoting the quality of urban life.” [1]. According to Hanafi, A. (2010) the abandonment of use of the public place of the city of Biskra, is due to the lack of the thermal comfort, which obliges its users to frequent them occasionally [2]. This article is to seek how and by what means to optimize the thermal comfort of the places as very open urban outdoor spaces and existing, with the objective of creating the shadow within these places, that is to say create a mask against the solar rays that cause discomfort and various skin diseases to people [3]. One will try ; to see the possible solutions relating to the form, to the insertion of the vegetation and water... etc. while seeking the appropriate solution for the public places of the city of Biskra / Algeria, by the combination between the measurements of of the necessary climatic factors “in situ” and the simulation by means of a software.
TL;DR: In this article, the Ito-Taylor expansion of a stochastic differential equation is used to obtain the exact solution of a call option of a stock at discretized time intervals.
Abstract: This paper will introduce the Ito’s lemma used in the stochastic calculus to obtain the Ito-Taylor expansion of a stochastic differential equations The Euler-Maruyama and Milstein’s methods of solving stochastic differential equations will be discussed and derived We will apply these two numerical methods to the Black-Scholes model to obtain the values of a European call option of a stock at discretized time intervals We will use a computer simulation to approximate while using the Ito’s formula to obtain the exact solution The numerical approximations to the exact solution to infer on the effectiveness of the two methods
TL;DR: In this paper, the importance of the five partial sub-watersheds that penetrate the city of Tebessa and their water networks in the Oued El Kabir watershed is determined.
Abstract: The objective of this work is to determine the importance of the five partial sub-watersheds that penetrate the city of Tebessa and their water networks in the “Oued El Kabir” watershed , belonging to the semi-arid climate Characterized by torrential rains constituting a natural danger, in terms of the real dimensions of the floods, especially since the hydromorphological characteristics of the valleys are not clear on the ground, because of the urban expansion which carried them away. The study was based on the morphometric and cartographic approach which allows the comparison of sub-watersheds between them, through 12 indicators, to determine the most influential sub- watersheds using GIS and remote sensing The results showed that the “ennagues” sub-watershed is the most dangerous for the city, it is a priority for its protection, and the need to manage the most vulnerable parts.
TL;DR: In this article, the water quality index is used to illustrate the general state of water quality in a single number, which can be considered as major factor for controlling quality of water with regard to drinking purposes.
Abstract: The present work aims to assess the groundwater quality using Water Quality Index (WQI), which can be considered as major factor for controlling quality of water with regarded to drinking purposes. Water quality index is used to illustrate the general state of water quality in a single number. This study concerns specifically Daia area upstream region of M'zab valley. Water samples have been collected at eighteen ground water points in two years 2016 and 2017. Then, different parameters are analyzed and compared with Algerian standards for drinking water. The hydrochemical study shows significant variations in physico-chemical measurement between two years 2016 and 2017. Also, the obtained results of the water quality index in Daia region show an excellent ranking with 94%, 88% in 2016 and 2017 years respectively.
TL;DR: In this article, two Schiff bases namely (E,E)-N,N’-biphenyl-4-4’diylbis[1-(furan-2-yl)methanimine] (BEFu) and3-[(Z)-N(4‘-aminobiphenylon-4yl)ethanimidoyl]-2-hydroy-6-methyl-4H-pyran-4one (BEDh) have been synthesized and characterized using UV-visible, FTIR, and N
Abstract: In this study, two Schiff bases namely (E,E)-N,N’-biphenyl-4-4’diylbis[1-(furan-2-yl)methanimine] (BEFu) and3-[(Z)-N(4’-aminobiphenyl-4yl)ethanimidoyl]-2-hydroy-6-methyl-4H-pyran-4-one (BEDh) have been synthesized and characterized using UV-visible, FTIR, and NMR techniques. The corrosion inhibition study of BEFu and BEDh was investigated for mild steel corrosion in 1M hydrochloric acid medium using weight loss method, potentiodynamic polarization, EIS techniques, and Density Functional Theory (DFT). The results showed that the inhibition efficiency increasing with concentration and revealing a mixed-type inhibitor of predominantly anodic type. To explain the inhibition abilities of those molecules adsorbed on the mild steel surface, quantum chemical calculations have been performed using DFT. The HOMO and LUMO energies were calculated to determine the global reactivity indexes. The experimental and theoretical results were in good agreement.