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1 – 10 of 27S.A. Umoren, I.B. Obot, L.E. Akpabio and S.E. Etuk
To investigate the adsorption behaviour and inhibitive effect of Vigna unguiculata (VU) extract (agricultural waste material) for aluminium corrosion in 0.5 M NaOH and H2SO4.
Abstract
Purpose
To investigate the adsorption behaviour and inhibitive effect of Vigna unguiculata (VU) extract (agricultural waste material) for aluminium corrosion in 0.5 M NaOH and H2SO4.
Design/methodology/approach
The inhibitive effect of the plant extract was assessed using weight loss method at 30 and 60oC. The trend of inhibition efficiency with temperature was used to propose the mechanism of inhibition and type of adsorption.
Findings
VU extract effectively inhibited aluminium corrosion in both alkaline and acidic media. Inhibition efficiency (I %) of the extract increased with increase in concentration of the extract and temperature. Inhibitor adsorption characteristics were approximated by Freunlich and Temkin adsorption isotherms at all the concentrations and temperatures studied. The phenomenon of chemical adsorption is proposed from the activation parameters obtained.
Research limitations/implications
The mechanistic aspect of the corrosion inhibition can be better understood using electrochemical studies such as polarization and AC impedance spectra.
Practical implications
The findings may be useful in metal surface anodizing and metal coating.
Originality/value
This paper provides new information on the possible application of VU extract as eco‐friendly inhibitor. It has not been reported elsewhere.
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Nseabasi S. Akpan and Emmanuel M. Akpabio
The Niger Delta is a region in Nigeria endowed with enormous natural resources of which petroleum oil is the most exploited. This petroleum oil has been the engine of development…
Abstract
The Niger Delta is a region in Nigeria endowed with enormous natural resources of which petroleum oil is the most exploited. This petroleum oil has been the engine of development in Nigeria since 1958, providing more than 90 percent of total exports (CBN, 1981) and over 80 percent of Federal Government revenue. Despite this, the Niger Delta people remain poor and underdeveloped. Youth restiveness and violence is the order of the day. As a product of two separate youth forums, this paper recommends good governance, youth impact assessments, youth inclusion in decision‐making, as well as capacity building as a way out of this discord.
Santiago Flores Merino, Juan José Caprari, Luis Vasquez Torres, Luis Figueroa Ramos and Antonella Hadzich Girola
The purpose of this paper is to study the ability of commercial tara powder to convert rust into iron tannate and evaluate their use as raw material for the formulation of water…
Abstract
Purpose
The purpose of this paper is to study the ability of commercial tara powder to convert rust into iron tannate and evaluate their use as raw material for the formulation of water based rust converter.
Design/methodology/approach
Water-borne acrylic primers were formulated with tara powder and aqueous tara extract and applied on steel rusted by three different methods. The conversion of rusted steel by tara tannins was studied by X-ray diffraction spectroscopy, infrared spectroscopy and scanning electron microscopy. The acrylic primers, containing hydrolysable tannins, were coated with alkyd finish and were evaluated in comparison to commercial systems in accelerated corrosion tests. The corrosion inhibition effects of tara powder on mild steel in 0.1M NaCl were studied by DC electrochemical techniques.
Findings
Tara tannin converts rust to ferric tannate and increases the magnetite content of rusted steel. The water-based acrylic primer formulated with aqueous extract of tara, alkyd-coated finish, showed performance equivalent to pure alkyd system.
Research limitations/implications
The chlorides content in the commercial tara powder can be screened the beneficial effect of hydrolysable tannins to convert rust. Furthermore, the water-based rust converter formulated with acrylic resin may be sensitive to salt contamination of rust.
Originality/value
Hydrolysable tannins from commercial tara powder have not been studied yet in its application to the development of rust converters. A water-based primer formulated with commercial tara powder developed for the effective treatment of rusted surfaces can be of interest as an environmentally friendly to current commercial approaches.
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Mofeyisara Oluwatoyin Omobowale and Ayokunle Olumuyiwa Omobowale
Ogechi Adeola, Ifedapo Adeleye, Garzali Muhammed, Babalola Josiah Olajubu, Chijioke Oji and Oserere Ibelegbu
Abstract
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Mostafa Abdel-Hamied, Ahmed A.M. Abdelhafez and Gomaa Abdel-Maksoud
This study aims to focus on the main materials used in consolidation processes of illuminated paper manuscripts and leather binding.
Abstract
Purpose
This study aims to focus on the main materials used in consolidation processes of illuminated paper manuscripts and leather binding.
Design/methodology/approach
For each material, chemical structure, chemical composition, molecular formula, solubility, advantages, disadvantages and its role in treatment process are presented.
Findings
This study concluded that carboxy methyl cellulose, hydroxy propyl cellulose, methyl cellulose, cellulose acetate, nanocrystalline cellulose, funori, sturgeon glue, poly vinyl alcohol, chitosan, chitosan nanoparticles (NPs), gelatin, aquazol, paraloid B72 and hydroxyapatite NPs were the most common and important materials used for the consolidation of illuminated paper manuscripts. For the leather bindings, hydroxy propyl cellulose, polyethylene glycol, oligomeric melamine-formaldehyde resin, acrylic wax SC6000, pliantex, paraloid B67 and B72, silicone oil and collagen NPs are the most consolidants used.
Originality/value
Illuminated paper manuscripts with leather binding are considered one of the most important objects in libraries, museums and storehouses. The uncontrolled conditions and other deterioration factors inside the libraries and storehouses lead to degradation of these artifacts. The brittleness, fragility and weakness are considered the most common deterioration aspects of illuminated paper manuscripts and leather binding. Therefore, the consolidation process became vital and important to solve this problem. This study presents the main materials used for consolidation process of illuminated paper manuscripts and leather bindings.
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Albert Anani-Bossman and Isaac Tandoh
Much of public relations scholarship in the last three decades has been dominated by discussions about best practices. Theories developed over the years have often been based on…
Abstract
Purpose
Much of public relations scholarship in the last three decades has been dominated by discussions about best practices. Theories developed over the years have often been based on western practices with little focus on emerging economies such as Africa. The growing call for a shift to a new system, especially from a non-western perspective has resulted in scholars examining public relations scholarship and practice in other jurisdictions, particularly in Asia. The onset of globalisation increased the scholarly discussion on public relations theorising, with culture playing a significant role in these discussions. This paper undertakes a review of the various discussions on public relations theorising due to globalisation and discusses its implications for public relations scholarship and practice in Africa.
Design/methodology/approach
The paper approaches the issue by examining relevant literature on globalisation and societal changes, public relations theorising, and the African worldview.
Findings
The paper concludes by proposing an African public relations framework that reflects the African worldview. The framework proposes that African public relations can be premised on four levels, humanist, relational, communalist, and strategic.
Research limitations/implications
This research is limited in the sense that the proposed framework has not been empirically tested for verification. It offers scholars the opportunity to empirically test it within the African setting.
Practical implications
The framework presents an opportunity for practitioners to review public relations practice within the African context.
Originality/value
The paper's originality is premised on the development of a public relations framework premised on African social values.
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Oluwafunmilayo Abimbola Shodipe, Bernice Sanusi, Felix Olajide Talabi and Omowale Adelabu
This paper aims to assess the role of radio programmes in agricultural development and enhancing the capacity of farmers in Oyo and Ogun states, situated in the South-West region…
Abstract
Purpose
This paper aims to assess the role of radio programmes in agricultural development and enhancing the capacity of farmers in Oyo and Ogun states, situated in the South-West region of Nigeria. Specifically, this study investigated Farm Radio International (FRI) radio broadcast strategies, their effectiveness and how they enhance the farmers’ knowledge, skills and practices.
Design/methodology/approach
The paper opted for a qualitative research design, using both interviews and focus group discussions to gather data from FRI radio partners and farmers.
Findings
Findings indicated that radio is effective in influencing the practices of farmers and helping them adopt new knowledge, ideas and skills. FRI partners use rural radio forum broadcasting strategy. Also, findings indicated that the most effective broadcasting strategy to reach the farmers with agricultural information is rural radio forum.
Practical implications
The paper includes implications for agricultural development organisations, providing a framework for monitoring and evaluating the impact of their communication interventions, helping ensure accountability and efficient use of funds.
Originality/value
This paper fulfils an identified need to investigate the broadcasting strategies that are most effective in reaching farmers with agricultural information and the influence of agricultural radio programmes on their farming practices.
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Annmarie Nicely and Radesh Palakurthi
Sustainable tourism demands a positivistic and holistic look at the true costs and benefits of the industry to host communities. To aid leaders in starting the process, the…
Abstract
Purpose
Sustainable tourism demands a positivistic and holistic look at the true costs and benefits of the industry to host communities. To aid leaders in starting the process, the article proposes a tourism options navigation model looking at varying number of visitors, their average daily spend and leakages, on the socio‐economic, cultural and environmental landscape of island communities. The article aims to identify various tourism options, their expected effects and potential strategies to mitigating negative outcomes and to later apply the model to the case of the rural parish of St Thomas, Jamaica.
Design/methodology/approach
To achieve the objectives outlined a comprehensive review of related literature was conducted. The researcher interviewed six of Jamaica's national tourism leaders and analyzed their responses.
Findings
It was posited that by employing strategies that impact the number of visitors to the area, their average daily spend and industry‐related economic import leakages, leaders can control the economic, social, cultural and environmental effects of tourism on communities but the process must begin with a clear articulation of the desired effects.
Research limitations/implications
The model could be a useful decision‐making tool for leaders considering tourism as a developmental option or in analyzing the current state of their communities' tourism industry. It could also form the basis for a more objective look at tourism success by researchers.
Originality/value
The model is unique as it provides a single comprehensive look at the causes and effects of tourism and possible ways forward.
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Emmanuel E. Baro, Monica Eberechukwu Eze and William O. Nkanu
The aim of the paper is to investigate the achievements of librarians from the workshop on e‐library services organized by the Librarians' Registration Council of Nigeria (LRCN…
Abstract
Purpose
The aim of the paper is to investigate the achievements of librarians from the workshop on e‐library services organized by the Librarians' Registration Council of Nigeria (LRCN) in collaboration with The United States Mission, Nigeria.
Design/methodology/approach
In total, 35 librarians purposively selected from universities, colleges of education, and polytechnic libraries participated in the study, which adopted semi‐structured interviews.
Findings
It emerged that librarians who participated in the workshop have been exposed to skills in areas such as database searching, using different search engines, using social media, knowledge of relevant websites, and knowledge of planning for e‐libraries. The participants are of the opinion that a workshop of this kind should be organized at least twice a year to upgrade librarians' skills on e‐library services in Nigeria.
Practical implications
Library associations in other developing countries can also partner with professionals from developed countries to organize workshops and seminars like this to equip librarians with the necessary skills to render e‐library services effectively and also to train users to use e‐resources effectively.
Originality/value
The paper reports skills the librarians have been exposed to through the workshop on e‐library services. Acquiring such skills will enable them effectively to use e‐resources and also train users on different search strategies.
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