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Article
Publication date: 1 April 1996

M.S. Ibrahim, R.M. Mohsen and S.M. El‐Sawy

Reports on the preparation of some organic corrosion inhibitors, carried out by the reaction of epoxidized linseed oil free fatty acids with different aliphatic amines…

Abstract

Reports on the preparation of some organic corrosion inhibitors, carried out by the reaction of epoxidized linseed oil free fatty acids with different aliphatic amines under the effect of γ‐ray irradiation. Notes that chemical and instrumental methods were used for identification of the reaction products and that the prepared inhibitors were tested for corrosion protection of steel surfaces by incorporating them in some chlorinated rubber varnishes. Reports that the physical, chemical and corrosion protective properties of the varnish films were studied. Concludes that the prepared inhibitors can be used in small quantities to provide varnishes of excellent adhesion and superior protective properties. Contends, also, that increase of the radiation dose during preparation of the inhibitors and/or during the drying process of the varnish films increases the protective properties of the formed films.

Details

Anti-Corrosion Methods and Materials, vol. 43 no. 4
Type: Research Article
ISSN: 0003-5599

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Article
Publication date: 17 August 2018

K. Suneetha, S.M. Ibrahim and G.V. Ramana Reddy

The purpose of this paper is to investigate the steady 2D buoyancy effects on MHD flow over a permeable stretching sheet through porous medium in the presence of suction/injection.

Abstract

Purpose

The purpose of this paper is to investigate the steady 2D buoyancy effects on MHD flow over a permeable stretching sheet through porous medium in the presence of suction/injection.

Design/methodology/approach

Similarity transformations are employed to transform the governing partial differential equations into ordinary differential equations. The transformed equations are then solved numerically by a shooting technique.

Findings

The working fluid is examined for several sundry parameters graphically and in tabular form. It is observed that with an increase in magnetic field and permeability of porous parameter, velocity profile decreases while temperature and concentration enhances. Stretching sheet parameter reduces velocity, temperature and concentration, whereas it increases skin friction factor, Nusselt number and Sherwood number.

Originality/value

Till now no numerical studies are reported on the effects of heat source and thermal radiation on MHD flow over a permeable stretching sheet embedded in porous medium in the presence of chemical reaction.

Details

Multidiscipline Modeling in Materials and Structures, vol. 14 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 4 September 2019

K. Suneetha, S.M. Ibrahim and G.V. Ramana Reddy

The purpose of this paper is to address the combined effects of thermal radiation and chemical reaction on steady MHD mixed convective heat and mass transfer flow past a…

Abstract

Purpose

The purpose of this paper is to address the combined effects of thermal radiation and chemical reaction on steady MHD mixed convective heat and mass transfer flow past a vertical surface under the influence of Joule and viscous dissipation.

Design/methodology/approach

The governing system of partial differential equations is transformed to dimensionless equations using dimensionless variables. The dimensionless equations are then solved analytically using perturbation technique.

Findings

With the help of graphs, the effects of the various important parameters entering into the problem on the dimensionless velocity, dimensionless temperature and dimensionless concentration fields within the boundary layer are discussed. The authors noticed that the velocity increases with an increase in the porosity parameter. An increase in the Prandtl number Pr, decreases the velocity and the temperature field. An increase in the radiation parameter, decreases the velocity and the temperature field. Also the effects of the pertinent parameters on the skin-friction coefficient and rates of heat and mass transfer in terms of the Nusselt and Sherwood numbers are presented numerically in tabular form.

Originality/value

To the best of the authors’ knowledge, recent this work has not been finished by any other researchers.

Details

Multidiscipline Modeling in Materials and Structures, vol. 16 no. 1
Type: Research Article
ISSN: 1573-6105

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Article
Publication date: 23 November 2018

Gangadhar Kotha, Keziya Kukkamalla and S.M. Ibrahim

The purpose of this paper is to examine the magneto hydrodynamic flow and heat transfer of nanofluids over a permeable wedge based on engine oil which is under the effects…

Abstract

Purpose

The purpose of this paper is to examine the magneto hydrodynamic flow and heat transfer of nanofluids over a permeable wedge based on engine oil which is under the effects of thermal radiation and convective heating.

Design/methodology/approach

The equations governing the flow are transformed into differential equations by applying similarity transformations. Keller box method is used to bring out the numerical solution.

Findings

The discovery interprets that temperature as well as the velocity of Ag-engine oil nanofluids are more noticeable than Cu-engine oil nanofluids. Thermal boundary layer increases for radiation parameter as well as Biot number. Fluctuations of co-efficient of drag skin friction as well heat transfer rate at the wall are also tested.

Originality/value

Till now, no numerical studies are reported on the heat transfer enhancement of the permeable wedge under thermal radiation on engine oil nanofluid flow by considering convective heating.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 1
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 19 September 2018

O.K. Koriko, I.L. Animasaun, A.J. Omowaye and T. Oreyeni

The purpose of this paper is to consider the problem of thermal destratification facing engineers and scientists during the motion of fluids which consist of rigid and…

Abstract

Purpose

The purpose of this paper is to consider the problem of thermal destratification facing engineers and scientists during the motion of fluids which consist of rigid and randomly oriented particles suspended in a viscous medium under the influence of Lorentz force. This paper provides an insight into the non-linear transfer of thermal radiation within the boundary layer.

Design/methodology/approach

Similarity transformation and parameterization of the non-linear partial differential equation are carried out. The approximate analytical solution of the governing equation which models the free convective flow of strong and weak concentration of micro-elements in a micropolar fluid over a vertical surface is presented.

Findings

It is observed that the velocity and temperature distribution are decreasing properties of thermal stratification parameter St. Maximum local skin friction coefficients are ascertained at an epilimnion level (St=0) when the magnitude of thermal radiation is small. Thermal stratification parameter has no significant effect on the temperature distribution in the flow near a free stream.

Originality/value

The relationship between stratification of temperature and the transfer of thermal energy during the problem of thermal destratification facing engineers and scientist during the motion of fluids which consist of rigid and randomly oriented particles suspended in a viscous medium under the influence of Lorentz force is unravelled in this paper.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 1
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 8 May 2018

Fatma A. Mohamed, Saadia A. Abd El-Megied, Mahmoud S. Bashandy and Hassan M. Ibrahim

This study aims to synthesise and characterise new reactive dyes based on thiazole derivatives which act as chromophoric moieties. These dyes were applied to cotton…

Abstract

Purpose

This study aims to synthesise and characterise new reactive dyes based on thiazole derivatives which act as chromophoric moieties. These dyes were applied to cotton fabric, resulting in the dyed fabrics exhibiting good colour strength, light fastness and other fastness properties. The antibacterial activity of the dyed cotton fabric was evaluated against gram-negative and gram-positive bacteria.

Design/methodology/approach

The dyes were synthesised in two steps. First, the coupling compound was formed by adding H-acid solution to cyanuric chloride in an ice bath at pH 5 then adding 4-aminobenzenesulphonic acid portion-wise at room temperature and at pH 6-7. Second, different diazonium salts 4-phenylthiazol-2-amine (2a) and 4-(4-methoxyphenyl) thiazol-2-amine (2b) were coupled with the coupling compound at pH 5. The resultant monochlorotriazine (MCT)-reactive dyes (6a, 6b) were formed. The synthesised dyes were applied onto cotton fabric under typical exhaust dyeing conditions and their dyeing properties were investigated.

Findings

High antimicrobial activity, dye exhaustion and fixation yield on cotton fabric were recorded for each dye. All dyes showed high stability against washing, rubbing, perspiration and light fastness.

Research limitations/implications

Dyeing of cotton fabric with these dyes which have higher fastness, higher exhaustion and higher antibacterial activity is considered one of the most important reactive dyes species.

Practical implications

The preparation procedure showed the synthesis of the novel MCT-reactive dyes derived from thiazole derivatives followed by the application of these dyes on cotton fabrics.

Social implications

Use of reactive dyes will bring a number of benefits to society including higher fastness and higher antibacterial activity so, and these dyes can be used for dyeing cotton.

Originality/value

In this work, the new reactive dyes derived from thiazole derivatives were synthesised and their structures were confirmed by the analytical and spectral data. Such compounds are considered to be excellent reactive dyes with different colour shades and higher antibacterial activity.

Details

Pigment & Resin Technology, vol. 47 no. 3
Type: Research Article
ISSN: 0369-9420

Keywords

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Case study
Publication date: 4 November 2019

Fazal Jawad Seyyed, Moeen Naseer Butt, Osama Malik and Rafia Mazhar

The purposes of this study included: recognizing the risks and challenges farmers face when growing a new crop, understanding agricultural marketing and its processes and…

Abstract

Learning outcomes

The purposes of this study included: recognizing the risks and challenges farmers face when growing a new crop, understanding agricultural marketing and its processes and developing a marketing strategy for a specialty agricultural product, such as quinoa.

Case overview/synopsis

The main focus of this case lies in identifying the risks faced by farmers in growing a new specialty crop and selecting the appropriate marketing strategies for targeting, positioning and channelling an agricultural product.

Complexity academic level

This case can be used in intermediate- to advanced-level marketing courses at the undergraduate and graduate levels in universities. It can also be used in agriculture and agribusiness–based courses in the undergraduate, graduate or executive level.

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.

Supplementary materials

Rehman, S.U., Selvaraj, M. and Ibrahim, M.S., 2012. Indian Agricultural Marketing-A Review. Asian Journal of Agriculture and Rural Development, 2(1), pp.69-75. Kotler, P., Keller, K.L., Ang, S.H., Tan, C.T. and Leong, S.M., 2018. Marketing Management: An Asian Perspective. Pearson.

Subject code

CSS 8: Marketing

Details

Emerald Emerging Markets Case Studies, vol. 9 no. 3
Type: Case Study
ISSN: 2045-0621

Keywords

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Article
Publication date: 20 January 2020

Tuan Azma Fatiema Tuan Ibrahim, Hafiza Aishah Hashim and Akmalia Mohamad Ariff

The purpose of this study is to investigate the relationship between ethical values and performance in the context of the banking sector in Malaysia.

Abstract

Purpose

The purpose of this study is to investigate the relationship between ethical values and performance in the context of the banking sector in Malaysia.

Design/methodology/approach

Based on the philanthropic model, this study posits that firms undertaking zakat and charity are ethical firms. Zakat disclosure index (ZDI) and charity disclosure index (CDI) were constructed to measure ethical values. This study hypothesises that ethical values are positively associated with bank performance. Ethical values (i.e. CDI and ZDI) and financial performance data (i.e. return on assets) were collected from the disclosures made in the annual reports of 50 banks for a period of five years (2010-2014).

Findings

A positive association was found between zakat disclosure and bank performance. The results indicate that higher zakat disclosure is associated with greater bank performance. However, no relationship was found between charity disclosure and bank performance.

Research limitations/implications

Considering the limitation of the index used in this study, other dimensions such as corporate governance, sustainability, products and environment can be considered in the development of index to measure ethical values in future studies.

Originality/value

This study offers additional explanation on the relationship between ethical values and performance by examining the role of zakat disclosures that characterize the unique aspects of Malaysian companies.

Details

Journal of Islamic Accounting and Business Research, vol. 11 no. 1
Type: Research Article
ISSN: 1759-0817

Keywords

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Article
Publication date: 1 January 1992

Talib Younis, S.A.M. Ibrahim and M.A. McLean

The first of a two‐part article (Part II to be published in IJPSM, Vol. 5 No. 2) which gives the historical background to thedevelopment of modern Turkey with particular…

Abstract

The first of a two‐part article (Part II to be published in IJPSM, Vol. 5 No. 2) which gives the historical background to the development of modern Turkey with particular reference to the inherited bureaucratic structure of the Ottoman Empire and the reforms undertaken by Mustafa Kemal Ataturk, the founder and first president of Turkey. Reviews the attempts made by successive Turkish governments to initiate and implement administrative reform. Discusses the barriers to the achievement of these objectives and draws conclusions as to the relative success or failure of the endeavours.

Details

International Journal of Public Sector Management, vol. 5 no. 1
Type: Research Article
ISSN: 0951-3558

Keywords

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Book part
Publication date: 20 May 2019

Murniati Mukhlisin and Leny Nofianti

Islamic financial institutions offer a different paradigm from conventional institutions. From corporate governance (CG) viewpoint, it embodies a number of interesting…

Abstract

Islamic financial institutions offer a different paradigm from conventional institutions. From corporate governance (CG) viewpoint, it embodies a number of interesting features since equity participation and profit-and-loss sharing arrangements form the basis of Islamic financing. These financial arrangements imply different stakeholder relationships and governance structures, and distinct from the conventional model since depositors have a direct financial stake in the bank's investment and equity participations. On top of that, the Islamic bank is subject to an additional layer of governance since the suitability of its investment and financing must be in strict conformity with Islamic law and the expectations of the Muslim community. Other form of governance such as accounting standards have also been an issue whether they have met the reporting requirement of Islamic financial institutions that carry title as “Islamic” as there is no uniformity. Therefore, there should be concerted efforts to revisit the existing good CG and accounting standards for Islamic financial institutions.

Details

Research in Corporate and Shari’ah Governance in the Muslim World: Theory and Practice
Type: Book
ISBN: 978-1-78973-007-4

Keywords

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