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Article
Publication date: 1 April 1999

Mohamed A. Radwan

Aims to prepare some organotin polymers based on N‐substituted acrylamide and methylacrylamide acid esters via a new synthetic route. Tri‐n‐butyltin‐∝‐bromoacrylate monomer…

319

Abstract

Aims to prepare some organotin polymers based on N‐substituted acrylamide and methylacrylamide acid esters via a new synthetic route. Tri‐n‐butyltin‐∝‐bromoacrylate monomer (TBTBA) was prepared and polymerisation carried out. Organotin polymers were prepared via the new synthetic route by exchange reactions.

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Pigment & Resin Technology, vol. 28 no. 2
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 April 1999

Mohamed A. Radwan

Hydroxy terminated polyesters were prepared by the reaction of tetrabromophthalic, phthalic, and maleic anhydrides with polyethylene glycol via melt condensation technique. They…

540

Abstract

Hydroxy terminated polyesters were prepared by the reaction of tetrabromophthalic, phthalic, and maleic anhydrides with polyethylene glycol via melt condensation technique. They were characterized by hydroxy number, and intrinsic viscosity measurements. Also, the fire retardancy of polyesters was evaluated as varnish films on plywood strips. The polyesters were reacted with excess toluene ‐2, 4‐ diisocyanate to yeild isocyanate terminated prepolymers which were subsequently reacted with 5, 5‐ dihydroxymethyl‐2‐trichloro‐methyl‐1,3‐ dioxane or ethelene diamine. These polymers were characterized by Ir and 1H NMR spectra, viscosity measurements, and thermogravimetric analysis.

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Pigment & Resin Technology, vol. 28 no. 2
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 August 1988

Fawzia F. Abdel‐Mohsen and Mohamed A. Radwan

Fire retardant alkyd resins modified with dehydrated caster oil were prepared directly without going though the alcoholysis step. The method is based upon dehydrating castor oil…

35

Abstract

Fire retardant alkyd resins modified with dehydrated caster oil were prepared directly without going though the alcoholysis step. The method is based upon dehydrating castor oil with trimellitic anhydride. The oil thus produced contains sufficient combined carboxyl groups capable of polyesterifications with triols and glycerol or chlorinated monocyclic acetal and glycerol, and the macro‐structure is completed by further reaction with PA or chlorendic anhydride to obtain flame retardant resins. Melamine formaldhyde resin have been used in combination with the previous alkyd resins to improve hardness and also fire retardancy.

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Pigment & Resin Technology, vol. 17 no. 8
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 1 November 1987

Fawzia F. Abdel‐Mohsen and Mohamed A. Radwan

Fire retardant oil‐modified alkyd resin based on chlorendic ahnydride (1,4,5,6,7 7‐hexachlorobicyclo‐(2,2,1) hept‐5‐ene‐2,3‐dicarboxylic anhydride) have been synthesized using…

24

Abstract

Fire retardant oil‐modified alkyd resin based on chlorendic ahnydride (1,4,5,6,7 7‐hexachlorobicyclo‐(2,2,1) hept‐5‐ene‐2,3‐dicarboxylic anhydride) have been synthesized using linseed oil, phthalic anhydride and glycerol. Several paint formulations were designed to study the effect of pigment/binder ratio, antimony trioxide and chlorinated thermosetting and thermoplastic polymers on fire retardancy. Oxygen index method was used to evaluate the fire retardancy of paints. The chlorinated alkyd resin was used as a plasticizer for laroflex MP 35 to improve the fire retardancy of the thermoplastic chlorinated polymer.

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Pigment & Resin Technology, vol. 16 no. 11
Type: Research Article
ISSN: 0369-9420

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Article
Publication date: 15 October 2019

Bhuvaneshwari Durvas Seshian, Bothi Raja Pandian and Umapathi Durai

The purpose of this study is to develop green/natural corrosion inhibitors. Adina cordifolia leaves extract (ACLE) was screened for its corrosion inhibition potential for mild…

143

Abstract

Purpose

The purpose of this study is to develop green/natural corrosion inhibitors. Adina cordifolia leaves extract (ACLE) was screened for its corrosion inhibition potential for mild steel (MS) corrosion in 0.5 M H2SO4 medium.

Design/methodology/approach

Adina cordifolia (AC) leaves were subjected to cold ethanol extraction and concentrated after refluxed with double distilled water. The resultant concentrate was screened for corrosion inhibition studies using sequence of standard corrosion monitoring techniques, namely, gravimetric analysis, electrochemical studies and scanning electron microscopy (SEM).

Findings

Gravimetric analysis provided evidence that the prepared ACLE showed dose dependent corrosion inhibition; impedance study revealed that the ACLE increases the charge transfer resistance and decreases double layer capacitance while polarization curves indicated that ACLE acts as a mixed-type inhibitor. Further studies over MS surface/test solutions through SEM and Fourier-Transform Infrared spectroscopy evident the formation of ACLE protective film protects MS.

Practical implications

AC’s methanol extract developed in this work can be used as a green corrosion inhibitor over industrial applications.

Originality/value

For the first time, AC leaves were tested as corrosion inhibitors for MS corrosion in 0.5 M H2SO4 medium. The results evidenced that ACLE will be a promising corrosion inhibitor, which could be usable in industries as a green corrosion inhibitor.

Details

Pigment & Resin Technology, vol. 49 no. 1
Type: Research Article
ISSN: 0369-9420

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Case study
Publication date: 19 November 2013

Mohamed Al Hosani and Syed Zamberi Ahmad

This case can be used in entrepreneurship, small business management, project management, strategic planning, and strategic management courses.

Abstract

Subject area

This case can be used in entrepreneurship, small business management, project management, strategic planning, and strategic management courses.

Study level/applicability

The case is suitable for undergraduate and postgraduate business students (bachelor and master levels).

Case overview

People's relationship to chocolate starts in childhood. Parents often motivate their kids simply by promising them a piece of chocolate. The making of candy is more of an art than a business, and managing a chocolate business requires more than just management skills. This case study highlights the success story of an entrepreneur called “Radwan Al Hosani”, who managed to transform his dream into practice through insistence and hard work. His chocolate shop “Fuala” was the first in this field to be made in the UAE, and he managed to enlarge his business from small shop in 2002 to 16 branches locally and internationally within ten years. The story in this case study serves as a source for imitation for those willing to start a new business as it illustrates real-world challenges that beginners may face.

Expected learning outcomes

This case study will expose students to a strategically successful example of expansion and critical thinking beyond the daily operation of a business. The students will be able to apply five forces business models.

Supplementary materials

Teaching notes are available for educators only. Please contact your library to gain login details or email support@emeraldinsight.com to request teaching notes.

Details

Emerald Emerging Markets Case Studies, vol. 3 no. 8
Type: Case Study
ISSN: 2045-0621

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Article
Publication date: 5 October 2022

Aya Mohamed Izzularab, Farouk Radwan, Ramadan Gad and Peter Björk

This study aims to investigate the effect of country image on investment intention and the role of investment image as a mediating factor. Both cognitive and affective country…

234

Abstract

Purpose

This study aims to investigate the effect of country image on investment intention and the role of investment image as a mediating factor. Both cognitive and affective country image dimensions were addressed to assess the functional and emotional aspects of the country image and their effects on investment intention. The current study targeted Egypt, as one of the developing countries, from the point of view of Nordic investors.

Design/methodology/approach

Partial least squares structural equation modeling was used to test the proposed model using data collected from 124 top managers of different companies in the clean energy sector in Nordic countries.

Findings

The results showed that cognitive and affective country images are positively related to the investment image, and that investment image is positively correlated with the investment intention. The investment image has a full mediating role in the relationship between cognitive and affective country images and investment intention.

Originality/value

The past few decades have witnessed a growing interest in country image research; however, limited studies have investigated the impact of country image on foreign investment intention. This study adds to the understanding for the potential contribution of the investment image of developing countries in the decision-making process for the foreign direct investment.

Details

Review of International Business and Strategy, vol. 33 no. 3
Type: Research Article
ISSN: 2059-6014

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Article
Publication date: 22 May 2023

Elhassan Kotb Abdelrahman Radwan, Nada Omar Hassan Ali and Mostafa Kayed Abdelazeem Mohamed

This study aims to explore the status and drivers (including free-floated shares, board size, rule duality and board independence) of corporate risk disclosure (CRD) for the…

309

Abstract

Purpose

This study aims to explore the status and drivers (including free-floated shares, board size, rule duality and board independence) of corporate risk disclosure (CRD) for the conventional listed banks in the Egyptian stock market from 2010 to 2021, which include the country’s major political upheavals and the COVID-19 pandemic.

Design/methodology/approach

This study based on a sample of 117 annual reports of sampled banks from 2010 to 2021. RD index of Al-Maghzom (2016) was developed and adopted to quantify CRD using an unweighted scoring system. The multiple linear regression model was used to validate the hypotheses.

Findings

The analysis shows that the COVID-19 pandemic increased insignificantly disclosure of all risks except for segment risks. In addition, findings reveal that all sampled banks adhere highly to the requirements of mandatory RD, with a low level of adherence to voluntary RD. Moreover, the analysis concluded that the board size and free-floating shares positively affect the disclosure of financial, operational, general information.

Research limitations/implications

The study’s limitations include the content analysis methodology, reliance on annual reports, emphasis on financial and non-financial risks, focus on listed conventional banks in Egypt.

Practical implications

Current study’s findings are more likely to be useful for many parties. It informs investors about the characteristics of the boards’ directors of Egyptian listed banks that disclosed risk information. Banks should disclose more comprehensive risk information. For academics, the current study’s limitations can be considered in their future research.

Originality/value

This work fills a new research area in which there is relatively little research in emerging financial markets that adds new evidence to the relationship between RD and both free-floating shares and board characteristics, particularly in Egypt.

Details

Journal of Financial Reporting and Accounting, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1985-2517

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Article
Publication date: 22 June 2010

Awny Sayed, Ahmed A. Radwan and Mohamed M. Abdallah

Information retrieval (IR) and feedback in Extensible Markup Language (XML) are rather new fields for researchers; natural questions arise, such as: how good are the feedback…

269

Abstract

Purpose

Information retrieval (IR) and feedback in Extensible Markup Language (XML) are rather new fields for researchers; natural questions arise, such as: how good are the feedback algorithms in XML IR? Can they be evaluated with standard evaluation tools? Even though some evaluation methods have been proposed in the literature it is still not clear yet which of them are applicable in the context of XML IR, and which metrics they can be combined with to assess the quality of XML retrieval algorithms that use feedback. This paper aims to elaborate on this.

Design/methodology/approach

The efficient evaluation of relevance feedback (RF) algorithms for XML collection posed interesting challenges on the IR and database researchers. The system based on the keyword‐based queries whether on the main query or in the RF processing instead of the XPath and structure query languages which were more complex. For measuring the efficiency of the system, the paper used the extended RF algorithms (residual collection and freezeTop) for evaluating the performance of the XML search engines. Compared to previous approaches, the paper aimed at removing the effect of the results for which the system has knowledge about their relevance, and at measuring the improvement on unseen relevant elements. The paper implemented the proposed evaluation methodologies by extending a standard evaluation tool with a module capable of assessing feedback algorithms for a specific set of metrics.

Findings

In this paper, the authors create an efficient XML retrieval system that is based on a query refinement by making a feedback processing and extending the main query terms with new terms mostly related to the main terms.

Research limitations/implications

The authors are working on more efficient retrieval algorithms to get the top‐ten results related to the submitted query. Moreover, they plan to extend the system to handle complex XPath expression.

Originality/value

This paper presents an efficient evaluation of RF algorithms for XML collection retrieval system.

Details

International Journal of Web Information Systems, vol. 6 no. 2
Type: Research Article
ISSN: 1744-0084

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Book part
Publication date: 20 January 2022

Paolo Biancone, Silvana Secinaro, Davide Calandra and Federico Chmet

The chapter aims to investigate the link between COVID-19 and Islamic finance, investigating how Islamic countries respond to the impact of the pandemic and how Islamic banks have…

Abstract

The chapter aims to investigate the link between COVID-19 and Islamic finance, investigating how Islamic countries respond to the impact of the pandemic and how Islamic banks have responded in consideration of their financial statements. The study proposes a novel perspective based on thematic analysis of blogs and newspapers to validate the relevant literature. Moreover, the documentary analysis will allow researchers to investigate Islamic banks' financial statements. We find that Islamic countries have used extraordinary Sukuk issuances both at government and cross-border level. Moreover, traditional instruments such as the Zakat have been converted for even more social uses. Concerning the literature, we find that there have been temporary tax suspensions and commodity supply measures to deal with the pandemic crisis's uncertainty. Finally, financial statements analysis reveals prudent behaviour with decreases in profits aimed at increasing risk provisions. The results provide theoretical evidence to researchers and practical evidence to policymakers, public policy investors and citizens.

Details

Towards a Post-Covid Global Financial System
Type: Book
ISBN: 978-1-80071-625-4

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