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1 – 10 of 115Roma G. Elfadel, Hala M. Refat, H. Abdelwahab, Salem S. Salem, Mohamed A. Awad and M.A.M. Abdel Reheim
This paper aims to investigate the prepared modified alkyd and poly(ester-amide) (PEA) resins as antimicrobial and insecticide binders for surface coating applications.
Abstract
Purpose
This paper aims to investigate the prepared modified alkyd and poly(ester-amide) (PEA) resins as antimicrobial and insecticide binders for surface coating applications.
Design/methodology/approach
Salicylic diethanolamine and 4-(N, N-dimethylamino) benzylidene glutamic acid were prepared and used as new sources of polyol and dibasic acid for PEA and alkyd resins, then confirmed by: acid value, FT-IR and 1H-NMR. The coating performance of the resins was determined using measurements of physico-mechanical properties. The biological and insecticide activities of the prepared resins were investigated.
Findings
The tests carried out revealed that the modified PEA and alkyd enhanced both phyisco-mechanical and chemical properties in addition to the biological and insecticide activities. The results of this paper illustrate that the introduction of salicylic diethanolamine and 4-(N, N-dimethylamino) benzylidene glutamic acid within the resin structure improved the film performance and enhanced the antimicrobial activity performance of PEA and alkyd resins.
Research limitations/implications
The modified alkyd and PEA organic resins can be used as biocidal binders when incorporated into paint formulations for multiple surface applications, especially those that are exposed to several organisms.
Originality/value
Modified alkyd and PEA resins based on newly synthesized modifiers have a significant potential to be promising in the production and development of antimicrobial and insecticide paints, allowing them to function to restrict the spread of insects and microbial infection.
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M.M. Elsawy, Mohamed A. Awad, Nashwa M. Saleh and H. Abd El-Wahab
Paper aims to Preparation and evaluation of isoxazole benzene sulfonamide derivatives and incorporated it with waterborne household paints to develop coating compositions as an…
Abstract
Purpose
Paper aims to Preparation and evaluation of isoxazole benzene sulfonamide derivatives and incorporated it with waterborne household paints to develop coating compositions as an insecticidal coating against Musca domestica adults.
Design/methodology/approach
The synthesized compounds were prepared and confirmed by different analyzes, fourier transform infra-red (FTIR), mass, proton nuclear magnetic resonance (1HNMR) and Carbon 13 nuclear magnetic resonance (13CNMR) spectra. The prepared compound has been blended with waterborne household paint formulation, the physical and mechanical properties of the paint formulation has been studied. The efficiency of the isoxazole benzene sulfonamide derivatives when incorporated with waterborne paint against Culex quinquefasciatus and Mosquito house fly adults, also have been examined.
Findings
The obtained results of the paint formulations confirmed their best performance and providing good scrub resistance. Also, the finding promising results of the insecticide test of the paint formulation may be because of the biological activity of these compounds and containing sulfonamide, cyanide and free aromatic amine groups comparing with the standard recommended organophosphorus insecticide. The order activity increase with increasing the dose concentration of the isoxazole derivatives and the activity of chemical compounds itself is represented in terms of their medium lethal concentrations LC50 (LC90), which recorded 0.90(1.62), 0.89(1.61) and 0.86(1.56) g/ml for 5, 3 and 4 chemical compounds, respectively, after 72 h from treatment.
Practical implications
These types of organic compounds are friendly environmentally and can be used as a biocide with different types of paint formulations.
Originality/value
Insecticide waterborne household paints based on isoxazole benzene sulfonamide derivatives as insecticide agents are novel.
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Sudan’s ruling party, its capabilities and political implications.
Details
DOI: 10.1108/OXAN-DB217188
ISSN: 2633-304X
Keywords
Geographic
Topical
Mohamed Aseel Shokr, Zulkefly Abdul Karim and Mohd Azlan Shah Zaidi
This paper aims to examine the effects of monetary policy and foreign shocks on output, inflation and exchange rate in Egypt.
Abstract
Purpose
This paper aims to examine the effects of monetary policy and foreign shocks on output, inflation and exchange rate in Egypt.
Design/methodology/approach
This paper studies the effects of monetary policy and foreign shocks on output, inflation and exchange rate by using non-recursive SVAR model and quarterly data.
Findings
First, the empirical results reveal that monetary policy shocks, through changes in interest rate or money supply, have a significant effect on output, inflation and exchange rate in Egypt. Second, the world oil prices and foreign output have significant impacts on output, inflation and exchange rate in Egypt, while foreign interest rate has a significant effect on domestic output and inflation.
Research limitations/implications
The limitation of the study is examining one country only.
Practical implications
The Central Bank of Egypt (CBE) should adjust interest rate to stabilize inflation, output and exchange rate. By stabilizing inflation, output and exchange rate, the CBE would be able to achieve the ultimate targets of monetary policy, namely, price stability and economic growth.
Social implications
It is important for the CBE because it shows the significant effect of monetary policy on macroeconomic variables in Egypt. Also, it is important for people because it shows the important role for the CBE.
Originality/value
It is important for the CBE because it examines the effect of monetary policy and foreign shocks on macroeconomic variables.
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This research aims to present an aero-propulsive interaction model applied to conceptual aircraft design with distributed electric propulsion (DeP). The developed model includes a…
Abstract
Purpose
This research aims to present an aero-propulsive interaction model applied to conceptual aircraft design with distributed electric propulsion (DeP). The developed model includes a series of electric ducted fans integrated into the wing upper trailing edge, taking into account the effect of boundary layer ingestion (BLI). The developed model aims to estimate the aerodynamic performance of the wing with DeP using an accurate low-order computational model, which can be easily used in the overall aircraft design's optimization process.
Design/methodology/approach
First, the ducted fan aerodynamic performance is investigated using a low-order computational model over a range of angle of attack required for conventional flight based on ducted fan design code program and analytical models. Subsequently, the aero-propulsive coupling with the wing is introduced. The DeP location chordwise is placed at the wing's trailing edge to have the full benefits of the BLI. After that, the propulsion integration process is introduced. The nacelle design's primary function is to minimize the losses due to distortion. Finally, the aerodynamic forces of the overall configuration are estimated based on Athena Vortex Lattice program and the developed ducted fan model.
Findings
The ducted fan model is validated with experimental measurements from the literature. Subsequently, the overall model, the wing with DeP, is validated with experimental measurements and computational fluid dynamics, both from the literature. The results reveal that the currently developed model successfully estimates the aerodynamic performance of DeP located at the wing trailing edge.
Originality/value
The developed model's value is to capture the aero-propulsive coupling accurately and fast enough to execute multiple times in the overall aircraft design's optimization loop without increasing runtime substantially.
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Hani S. Abd El-Montaleb, Khaled Abd-Elhakam Abbas, Mai Ali Mwaheb and Shaimaa Mohamed Hamdy
The purpose of this study is to develop functional probiotic Labneh cheeses supplemented with broccoli florets.
Abstract
Purpose
The purpose of this study is to develop functional probiotic Labneh cheeses supplemented with broccoli florets.
Design/methodology/approach
Probiotic Labneh cheese was produced using broccoli florets paste at four different levels (0, 5, 10 and 15%), with Lactobacillus casei NRRL B-1922 as a probiotic strain, to evaluate its physicochemical, phenols, antioxidant activity, minerals, vitamins, textural, microbiological and sensory characteristics during storage for 15 days.
Findings
The results indicated that Labneh cheese with added broccoli paste exhibited significantly (p = 0.05) higher level of moisture, acidity, soluble nitrogen, phenols, antioxidant activity, minerals and B vitamins, and lower protein, fat, ash and pH values when compared to control Labneh cheese. Textural analysis of Labneh cheese indicated that Labneh with higher level of broccoli (15%) exhibited harder texture than others. Higher viable counts of Lactobacillus casei and Streptococcus thermophilus were detected in Labneh with broccoli paste, and the counts (107 cfu/g) were higher than the number should be present to achieve their health benefits. The most acceptable Labneh cheeses were those supplemented with 5 and 10% broccoli paste.
Originality/value
This study revealed broccoli florets could enhance the growth of Lactobacillus casei and Streptococcus thermophilus in the Labneh matrix, which resulted in a wider spectrum of health benefits of Labneh cheese to the consumers.
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Maha S. Abdo, Samira A. Ahmed, Basmah K. Awad and Mohamed H. Elsharnouby
This study aims to identify the determinants of customers' green purchasing behaviors. First, the study examines the relationship between green self-identity (GSI) and green peer…
Abstract
Purpose
This study aims to identify the determinants of customers' green purchasing behaviors. First, the study examines the relationship between green self-identity (GSI) and green peer influence (GPI) on green purchase behavior (GPB). Second, it examines the relationships between both GSI and GPI, and purchasing behavior mediated by green consumption values (functional value (FV) and social value (SV)). Third, it investigates the moderating effect of customer disidentification (CDI) on the relationships between GSI and both green consumption values. Finally, it investigates the indirect relationships between GSI and purchasing behavior moderated by CDI.
Design/methodology/approach
A quantitative study is conducted using a survey of 204 Egyptian buyers of organic food products. AMOS and Hayes's PROCESS macro are used to test the hypotheses under investigation.
Findings
The customer's peer influence and GSI are found to have a positive impact on green purchasing behavior. Additionally, the mediating impact of values and the moderating impact of CDI are also confirmed.
Practical implications
This study helps organic food companies in identifying the determinants of customers' green purchasing behavior. The results of the study will guide the efforts of green marketing professionals in promoting green products in the Egyptian market.
Originality/value
Since the notion of green consumption is still in its infancy, there is a need for further exploration on the green consumption concept to better understand customers' predictors of that type of consumption; accordingly, the current research was conducted.
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Mohamed Awad El Araby and Noor el Dien Salem Ayaad
The main target of the study represented in developing a proposed Quantitative Model for the purpose of measuring the administrative performance of public governmental…
Abstract
Purpose
The main target of the study represented in developing a proposed Quantitative Model for the purpose of measuring the administrative performance of public governmental organizations, taking into account the validity of the model for many different contexts in practice through governmental sector.
Design/methodology/approach
Depending on statistical approach, both authors tried to handle this issue through assessing institutional performance in the state owned units on many levels starting from individual level (HR and leaders), sub-units, organization level, then deriving an aggregated formula for assessing general institutional performance of the whole public body in one state, depending on reviewing some of concerned literatures.
Findings
The authors could already formulate some proposed criteria for assessing and measuring institutional performance on three different levels.
Originality/value
Although the topic is considered one of the most complicated areas of institutional reform trends, the idea remains very vital as a step forward to improving public policy implementation in the governmental sector, besides that it is correlated to institutional capacity building process in practice.
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Work engagement denotes to a state of positive and affective motivation of elevated power joined with high educational levels and a great concentration on occupation and it is…
Abstract
Purpose
Work engagement denotes to a state of positive and affective motivation of elevated power joined with high educational levels and a great concentration on occupation and it is negatively affected by psychological problems. This study aims to assess the stress and work engagement among Palestinian nurses working in intensive care units.
Design/methodology/approach
A cross-sectional design was adopted. A convenience sample consisting of 225 intensive care nurses from governmental hospitals was recruited to participate. Data collection used the Nursing Stress Scale and Utrecht Work Engagement Scale-9, and demographic data were used to gather data throughout the period from February 10 to March 30, 2023.
Findings
Findings demonstrated that nurses’ stress levels were high (M = 105.9 ± standard deviation [SD] = 11.91). Concerning work engagement, the nurses endorsed moderate work engagement levels with a mean of 3.7 (SD = 0.4). Regarding work engagement subscales, the mean of vigor was 3.7 (0.6), dedication with a mean of 3.7 (0.6) and absorption with a mean of 3.7 (0.6). Also, the findings showed that stress, gender and monthly income were predictors of work engagement (p < 0.05).
Research limitations/implications
Despite the significant results, this study had the following limitations: the design was cross-sectional, which limits the ability to explore the cause and effect of the study variables, thus longitudinal studies are recommended. In addition, the study adopted a self-reported questionnaire based on participants’ understanding, culture and work context which could influence their responses.
Originality/value
The intensive care nurses had high stress levels and moderate work engagement. Stress, gender and monthly income were predictors of the work engagement. Thus, interventions should be encouraged to minimize stress, which has a significant influence on work engagement.
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Afef Saihi, Mahmoud Awad and Mohamed Ben-Daya
Quality 4.0 is an emerging research topic concerned with rethinking how quality management needs to be adopted in the digital era. The purpose of this research is to conduct a…
Abstract
Purpose
Quality 4.0 is an emerging research topic concerned with rethinking how quality management needs to be adopted in the digital era. The purpose of this research is to conduct a systematic review on the state of the research in the field of Industry 4.0 impact on improving quality management aspects and how technology can be leveraged to enhance its practices.
Design/methodology/approach
A systematic review of the literature published in the last 5 years is conducted. 52 papers were selected, mapped based on the technology they focused on and categorized based on the addressed quality aspects.
Findings
The review revealed various areas where quality management can benefit from Industry 4.0 technologies, identified several research gaps and suggested new directions for future research. Firstly, the literature provided some insights about industry 4.0 potential contributions but lacks further detail on the exact applications and solutions through use cases and case studies. Secondly, there has been a focus on the potential benefits provided for quality control while there is a clear scarcity in terms of the other quality management tools and methodologies. Thirdly, there is a lack of studies on economic analysis or detailed impacts on quality costs that justifies the substantial investments needed. Finally, there is a need for including more studies about the mapping and integration of ISO 9001 requirements and Industry 4.0 features.
Originality/value
This is the first attempt to conduct a comprehensive review on the ways industry 4.0 technologies can be leveraged for the field of quality management. Based on this review, several directions for further research in this area are identified.
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