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1 – 5 of 5Mostafa 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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Hamdy Mohamed Mohamed and Wael Sabry Mohamed
The study aims to assess the efficiency of nanocomposite to improve the properties of gap-filling materials for pottery artifacts.
Abstract
Purpose
The study aims to assess the efficiency of nanocomposite to improve the properties of gap-filling materials for pottery artifacts.
Design/methodology/approach
Five different pastes were used in the laboratory studies. The pastes consist mainly of pottery powder (grog), dental plaster, microballoons and an adhesive of Primal AC33, nano-silica and nano kaolinite in various concentrations. The prepared samples were subjected to accelerated heat and light aging. Besides, some investigations were used to evaluate the efficacy of the additive nanomaterials, such as TEM, digital and scanning electron microscopy microscopes. Contact angle, color change, shrinkage degree, physical properties and compressive strength tests were also conducted.
Findings
The results indicated that using Nano-silica considerably improves the mechanical strength and decreases the shrinkage of gap-filling materials. According to the results, a mixture of grog, microballoons and Primal AC33/Nano-silica Nanocomposites is the optimal gap-filling paste for archaeological pottery. Moreover, this paste showed a higher contact angle (120°), lower color change (ΔE = 2.62), lower shrinkage (3.3%), lower water absorption (3.36%), lower porosity (5.05%) and higher compressive strength (5124 N/mm2).
Originality/value
This paper attains to develop an economic polymer-nanocomposite that can be used with gap-filling materials for pottery artifacts.
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Natasha Khalil, Siti Noorfairus Che Abdullah, Siti Norsazlina Haron and Md Yusof Hamid
The survival of hotel business in maintaining market competitiveness depends on the constant improvement of the quality of hotel facilities and services. The key to sustain hotel…
Abstract
Purpose
The survival of hotel business in maintaining market competitiveness depends on the constant improvement of the quality of hotel facilities and services. The key to sustain hotel business is lean on the adaptability of the hotel management team towards current lifestyle trends and its surrounding context in fulfilling customer satisfaction. Because of hotel operating service complexity, the hotel contributes a higher impact on environmental degradation in performing their daily activities. Therefore, hoteliers need to determine sustainable strategies to minimize environmental impact and at the same time be able to provide satisfaction to their customers. However, green initiatives require a proactive action by the organizational management engaging both employees and guests in the environmental management process. Thus, this paper aims to review the concept of green practices, the implementation of green practices from the stakeholders’ perspectives (manager, employee and customers) in the hotel industry, the performance impact from the green practices on the sustainability pillars and to further develop a conceptual green practice to sustainable hotel operations and performance impact.
Design/methodology/approach
This paper identified relevant empirical research that published in the recent 10 years from January 2012 to December 2021. The articles are searched through reputable databases such as Emerald, Elsevier and Taylor and Francis. The obtained data were screened preliminarily from 108 research papers. The post-screening process has finalized a total of 57 articles as the findings for this paper, where the themes were delineated to the attributes that need to implemented by the stakeholder in hotels industry, that is, manager’s perspectives, employee’s perspectives and customer’s perspectives.
Findings
The findings of this paper revealed that there are 27 attributes of green practices and initiatives for sustainable hotel operations from the manager perspectives (10 attributes – Green Marketing Strategy, Green Managerial Attitude, Eco-Innovation Investment, Marketing and Sustainability, Environmental Management Strategy, Green Supply Chain, Green Managerial Awareness, Green Procurement, Green Human Resources and Green Technology), employee perspectives (5 attributes – Employee Green Awareness, Employee Green Training and Educating, Employee Environmental Behaviour, Employee Green Performance and Employee Green Reward) and customer’s perspectives (12 attributes – Customer Perception, Customer Loyalty, Customer Awareness, Customer Behaviour, Customer Trust, Green Supply Chain, Green Value, Green Marketing Strategy, Customer Perceived Value, Service Quality, Brand Image and Hotel Design). All of the attributes are aligned to the performance effectiveness as the major concern in the hotel’s operations and impacted towards the sustainability pillars, environmental performance, economic performance and social performance. Sustainable practice in organization benefits the owners towards sustainable economic, environmental, socio-cultural and legal policy.
Originality/value
This review paper provides key elements of current green practices and sustainable initiatives for the hotel’s operations, as proactive measures. The novelty of the findings is to be able to convey valuable inputs to the relevant stakeholders (hotel’s owner, consultants, designers, maintenance officers, hoteliers, staffs, customers and end-users) in perceiving the elements of green practices into the preliminary planning of the hotel’s design. The review also helps to identify practices and measures to the performance impact to the hotel’s operations.
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Saswati Tripathi and Siddhartha Shankar Roy
This article aims to comprehensively review the measurement and management of supply chain performance (SCP) and strategic performance (SP). It strives to identify integrable…
Abstract
Purpose
This article aims to comprehensively review the measurement and management of supply chain performance (SCP) and strategic performance (SP). It strives to identify integrable features regarding frameworks, measurement approaches, practices and emerging research issues in these areas to integrate SCP and SP for measuring and managing performance. It intends to develop a dynamic-integrated-performance-system by incorporating integrable aspects of SCP and SP to link these domains for organizational performance improvement.
Design/methodology/approach
Using systematic-literature-review, this study analyzes 154 articles published in selected peer-reviewed international journals from 2000 to 2023 regarding SCP and SP. It assesses existing knowledge regarding research-design followed, challenging areas and imperatives in these critical business domains to investigate the prior conceptual, empirical, case study-based and literature-review-based articles.
Findings
The study identifies integrable features regarding key theoretical and measurement frameworks, critical objectives, significant measures, effective practices for measuring and managing SCP and SP and emerging research issues common to these areas. The findings help develop a dynamic-integrated-performance-system that uses the theoretical lenses of resource-based-view/dynamic-capability-theory and adopts a comprehensive framework like DBSC (system-dynamic-model with BSC perspectives). It incorporates identified integrable measures and best practices to monitor, measure, manage and improve organizational performance for sustainable competitive advantage. The article reveals that earlier studies have overlooked analyzing SCP and SP integration aspects.
Research limitations/implications
From the theoretical viewpoint, the present SLR is unique in three ways: first, in investigating both the measurement and management of SCP and SP holistically; second, in identifying integrative features of these two; and third, in proposing a DIPS to link SCP and SP for performance improvement. The study reveals that existing literature has focused on measuring and managing SCP and SP in isolation without attempting a comprehensive and unified approach to integrate the respective domains. The present SLR adopts a holistic approach to link SCP and SP from SCM and strategic-management perspectives. The study proposes a dynamic-integrated-performance-system to measure, manage and improve performance in a unified method.
Practical implications
This study provides SC and strategy practitioners with an understanding of strategy-performance pathways for achieving strategic objectives and executing risk mitigation initiatives to counter disruptions. It enables SC managers to comprehend SC practices and SCP leading to dynamic SC capabilities development. Operationalizing the proposed DIPS will help firms link SCP and SP, align operational SC practices with strategic sustainability and circularity objectives and meet sustainable development goals while benefiting social and environmental stakeholders.
Originality/value
Assessing relationships and identifying a unified approach integrating SCP with SP have not been addressed earlier. This study's uniqueness is finding integrable features of SCP and SP and constructing a dynamic-integrated-performance-system to link these domains for achieving strategic competitiveness.
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The purpose of this study is to prepare a new adsorbent activated carbon immobilized on polystyrene (ACPS) for uranium (VI) and thorium (IV) removal from an aqueous solution…
Abstract
Purpose
The purpose of this study is to prepare a new adsorbent activated carbon immobilized on polystyrene (ACPS) for uranium (VI) and thorium (IV) removal from an aqueous solution. Activated carbon (AC) was derived from biochar material by chemical activation to increase the active sites on its surface and enhance the adsorption capacity. Activated carbon (AC) was immobilized on polystyrene (PS) to improve the physical properties and facilitate separation from the working solution. A feasibility study for the adsorption of uranium (VI) and thorium (IV) on the new adsorbent (ACPS) has been achieved. Adsorption kinetics, isotherms, and thermodynamics models of the adsorption process were used to describe the reaction mechanism.
Design/methodology/approach
Activated carbon was synthesized from biochar charcoal by 2 M H2SO4. Activated carbon was immobilized on the pretreatment polystyrene by hydrothermal process forming new adsorbent (ACPS). Characterization studies were carried out by scanning electron microscope, energy-dispersive X-ray spectrometer, infrared spectroscopy and X-ray diffraction techniques. Different factors affect the adsorption process as pH, contact time, solid/liquid ratio, initial concentration and temperature. The adsorption mechanism was explained according to kinetic, isothermal and thermodynamic studies. Also, the regeneration of spent ACPS was studied.
Findings
The experimental results showed that pH and equilibrium time of the best adsorption were 6.0 and 60 min for U(VI), 4.0 and 90 min for Th(IV), (pHPZC = 3.4). The experimental results fit well with pseudo-second order, Freundlich and Dubinin–Radushkevich models proving the chemisorption and heterogenous adsorption reaction. Adsorption thermodynamics demonstrated that the adsorption process is exothermic and has random nature of the solid/liquid interface. In addition, the regeneration of spent ACPS research showed that the adsorbent has good chemical stability. According to the comparative study, ACPS shows higher adsorption capacities of U(VI) and Th(IV) than other previous bio-adsorbents.
Originality/value
This study was conducted to improve the chemical and physical properties of bio-charcoal purchased from the local market to activated carbon by hydrothermal method. Activated carbon was immobilized on polystyrene forming new adsorbent ACPS for eliminating U(VI) and Th(IV) from aqueous solutions.
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