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The purpose of this study is to determine the effect of calcium supplementation on the iron bioavailability from spirulina (SP) and ferrous sulphate (FE) as reference in iron deficient rats.

Sixty‐four weanling male Sprague‐Dawley rats were first depleted of iron by giving low iron diet for a period of 28 days. The anaemic rats were repleted with iron sources from SP, spirulina+CaCO3 (SPC), FE, FeSO4+CaCO3 (FEC), normal diet (ND), normal diet+CaCO3 (NDC) for 21 days. Iron level of FE supplementation was twice the level of that in SP supplementation. Haematological variables were measured on the last day of preexperimental period and at the end of the repletion period.

Paired samples t‐test at P<0.05 showed that haemoglobin (Hb) and haematocrit (Ht) was increased in all the groups. The diet with added calcium did not significantly inhibit haemoglobin repletion after 21 days in SP and FE. The haemoglobin repletion efficiency (HRE) was significantly higher in rats fed with SP compared to FE (P>0.05). The presence of calcium did not significantly reduce the HRE of these groups.

This paper provides information on effects of additional calcium on iron bioavailability from SP as the intake of dietary supplementation is increasing worldwide.

This paper aims to examine the impact of religiosity on Muslim-friendly destination performance, customer engagement and customer satisfaction; the mediating impact of Muslim-friendly destination performance, customer engagement and customer satisfaction on the link between religiosity and word of mouth (WOM); and the moderating impact of religiosity on the relationship between Muslim-friendly tourism, customer engagement and customer satisfaction.

The population of this study was all tourists who visited West Sumatra Indonesia. By using a survey through questionnaires, this study has got 393 out of 450 collected responses (83.6%). This research used the structural equation modeling as the data analysis technique.

This research found that religiosity is a significant antecedent of Muslim-friendly tourism, customer engagement and tourist satisfaction. This study revealed that Muslim-friendly tourism, customer engagement and tourist satisfaction significantly mediate the link between religiosity and WOM. This research also found that religiosity significantly moderates the effect of Muslim-friendly tourism on tourist satisfaction.

This study was only conducted in Indonesia; hence, it lacks generality. Accordingly, future studies can expand to several other countries such as Southeast Asian countries which have big Muslim population. This study only focused on Muslim-friendly tourism industry as a whole. For future studies, it can be extended to several related industries, such as hotel, food and beverage and halal cosmetic.

This study has shown the important of manager knowledge about religiosity of customers. Accordingly, when they want to increase tourists’ WOM, they have to increase tourist perceived quality of Muslim-friendly tourism attributes which also have an impact on customer engagement and tourist satisfaction.

This study proposes the direct relationship between religiosity and Muslim-friendly tourism, the religiosity-customer engagement link and the religiosity-tourist satisfaction relation. This research has revealed the mediating effect of Muslim-friendly tourism, satisfaction and engagement on the link between religiosity and WOM. This study has also revealed the impact of religiosity in strengthening the link between halal tourism and tourist satisfaction which is limited previously.

This study aims to examine the relationship between perceived risk and tourists’ trust. It also investigates the role of perceived value as a mediating variable on the link between perceived risk and trust. Moreover, the moderating role of religiosity on the link between perceived value and trust has also been highlighted.

The research population is all tourists who have visited West Sumatra Indonesia in the past two years. This research used a survey method using questionnaires and used purposive sampling as the sampling method. It collected 400 responses and after some preliminary tests, 352 usable responses have been analyzed. The authors used a covariance-based structural equation model using AMOS 24 as the data analysis tool.

This quantitative research found that perceived risk dimensions (health, environmental and financial risk) have significant impacts on perceived value. Perceived risk dimensions also have significant effects on trust except for health risk. It also found that perceived value has a significant impact on trust and finally, religiosity which has a significant moderating impact on the relationship between perceived value and trust.

This study is only one country study; hence, it has limited finding generalization. It needs to be expanded to other countries such as Southeast Asia countries. It only used three antecedents of trust, therefore, for future research; it might be extended to other antecedents such as cultural value, tourist efficacy and also some consequences of trust such as revisit intention and customer involvement. Finally, this is a cross-sectional study; hence, for future research, it might be expanded to a longitudinal study where the results are more generalized.

Trust will lead to tourist loyalty. Therefore, to establish trust, the managers need to provide the best services with pay attention to the tourist perceived risk. Moreover, it found that perceived risks will lead to tourists’ perceived value. Accordingly, to increase the tourist perceived value, the tourist destination managers have to minimize risk or uncertainty in the tourist destination such as environmental and health risk in the tourist destination. Finally, religiosity will strengthen the tourist trust, hence; the managers can attract and serve high religiosity tourists with Halal standard products and services.

This study has examined the relationship between perceived risk dimensions and perceived value which is not investigated in the previous studies. It also examined the mediating roles of perceived value on the link between perceived risk dimensions and trust. These mediating roles have not been addressed yet previously. Finally, it has also revealed a significant moderating effect of religiosity on the link between perceived value and trust which is neglected previously.

The purpose of this paper is to introduce a new framework to optimise the design of halal food supply chains, called the “Halal Supply Chain Model”. In this research the main logistics business processes are defined, which are the determinants for the halal supply chain performance.

Next to an extensive literature review, a large discussion group and various focus group sessions conducted in Malaysia, The Netherlands and China have been used to identify halal control activities and assurance activities in logistics business processes, with a focus on transportation, warehousing and terminal operations.

The findings show that product characteristics (bulk versus unitised, ambient versus cool chain) and market requirements (Muslim or non‐Muslim country) determine the supply chain vulnerability to halal contamination, for which halal control activities and assurance activities are put in place to reduce supply chain vulnerability. More empirical research is needed to further refine the Halal Supply Chain Model for different product–market combinations. Second, qualitative research is recommended for halal cosmetics and pharmaceutical supply chains.

This study shows that halal supply chain management is different from conventional supply chain management, which requires a halal policy and specific design parameters for supply chain objectives, logistics control, supply chain network structure, supply chain business processes, supply chain resources and supply chain performance metrics.

The Halal Supply Chain Model can be an important instrument to design and manage halal food supply chains in extending halal integrity from source to point of consumer purchase. As there is an evident lack of academic research in the field of halal supply chain management, it provides an important reference for halal logistics and supply chain management. The large discussion group and focus group sessions resulted in the publication of the International Halal Logistics Standard (IHIAS 0100:2010) by IHI Alliance in 2010.

The purpose of this paper is to investigate the preferred minimum level of segregation for halal meat in supermarket, transport, storage and terminals; the responsibility of halal logistics; and the willingness to pay for halal logistics in a Muslim and non‐Muslim country.

This is a comparative study involving Muslim consumers in Malaysia and The Netherlands. Cross‐sectional data were collected through a survey with 251 Muslims in Malaysia and 250 Muslims in The Netherlands. Data were analysed by means of nonparametric tests.

There is a preferred higher level of segregation in a Muslim country than a non‐Muslim country. A Muslim country has a higher willingness to pay for a halal logistics system as compared to a non‐Muslim country. Furthermore, there lies a heavy responsibility with the manufacturer to extend halal assurance towards supply chain management.

The study confirms there is a need for a different level of segregation and therefore different halal logistics standard in a Muslim country and a non‐Muslim country. However, during the survey in The Netherlands significant rejections were received from especially first generation Muslims due to the lack of understanding of the Dutch language. Similar surveys need to be conducted in other countries in order to be able to generalise over the various Islamic schools of thought, local fatwas and local customs.

Halal logistics is important to the Muslim consumer and critical for the trust in a halal certified brand, which requires extending halal integrity from point of production to the point of consumer purchase.

This study is a preliminary one investigating the consumer perception on halal logistics. The study indicates the level of segregation required for a halal meat supply chain in a Muslim and non‐Muslim country.

This study aims to explore a sustainable and responsible investment (SRI) sukuk model based on Musharakah that could be implemented to develop waqf properties and assets under the SRI sukuk framework in Malaysia. This includes proposing and designing a potential SRI sukuk model and seeking the opinion of subject-matter experts and industry practitioners on the model, its attractiveness to investors and its feasibility to implement in Malaysia.

The study adopts desk research and semi-structured interview as its methodology. A desk research is where a detailed critical review and analysis of past literature from reports, journals, framework, books and practices are undertaken. To establish a SRI sukuk model, the paper also studies the cases of the first SRI sukuk issued in Malaysia and other waqf-related sukuks that have been structured for the development of waqf property/asset in the past. Following that, the opinion of subject-matter experts and industry practitioners on the proposed SRI sukuk model is sought in a semi-structured interview.

Based on the interviewees’ response, the study proposes the most feasible SRI sukuk model that could be implemented in the Malaysian context for the development of waqf properties/assets, which is a Musharakah-based sukuk model. The model will be elaborated based on the purpose of development, functionality, choice of Shari’ah contract, obligor and return mechanism.

This paper is exploratory in nature. While it explores the structural point of view only, future research could analyse and identify the legal, regulatory, financial and Shari’ah aspects of the proposed model. Further empirical studies can be done to provide more comprehensive idea and knowledge regarding the subject matter.

The study serves great benefit to the government, waqf administrators, regulators, policymakers, foundations, corporations and interested investors to explore SRI sukuk as one of the feasible financial instruments to develop waqf in Malaysia.

This study proposes the use of an innovative financial instrument called SRI sukuk and structures a feasible SRI sukuk model to help realise the true roles of waqf as not only a religious tool but also one of the instruments for human, economic and social developments.

The phenomenon of delayed payment to contractors, particularly in the construction industry, is a vital one and has implications for the health of economies of both developing and developed countries. However, the knowledge of this phenomenon seems patchy and scattered. This paper aims to provide a comprehensive overview of the knowledge on the subject matter with directions for future research.

A systematic literature review coupled with a scientometric analysis was used to identify the main strands of delayed payment to contractor research as a basis for qualitative analysis and directions for future investigations.

Current trends of delayed payment to contractor research are categorised into five broad themes, namely: causes, effects, mitigation measures, ethical and law and regulatory issues. On the basis of these themes, directions for future research are proffered.

To the best of the authors knowledge, this is the first attempt at providing a comprehensive and an integrated knowledge on delayed payment to contractor research with pointers for further investigation and policy directions.

The oil and gas construction projects are affected negatively by the drop in oil price in recent years. Thus, most engineering, procurement and construction (EPC) companies are opting to optimize the project mainly to mitigate the source of risks in construction to achieve the project expectation. Risk factors cause a threat to the project objectives regarding time, cost and quality. It is additionally a vital component in deviating from the client's expectation of productivity, safety and standards. This research aims to investigate the causes of risk in the oil and gas construction projects in Yemen.

A comprehensive literature review from various sources including books, conference proceedings, the Internet project management journals and oil and gas industry journals was conducted to achieve the objectives of this study. This initial work was predicated strictly on a literature review and the judgments of experts to develop the risk factor framework for the oil and gas construction projects in Yemen.

The authors found a few studies related to risk factors in oil and gas construction projects and shared a similar view about general construction projects. However, only a fraction of the factors accepted have included the variances of other studies on a regional basis or specific countries, such as the Yemen situation, due to the differences between the general construction industry and oil and gas industry. Moreover, the factors of these attributes were still accepted due to their applicability to the oil and gas industry, and no significant variances existed between countries. Research has indicated that 51 critical factors cause risks in the oil and gas construction projects in Yemen. Such risk factors can be divided into two major groups: (1) internal risk factors, including seven critical sources of risks, namely client, contractor, consultant, feasibility study and design, tendering and contract, resources and material supply and project management; and (2) external risk factors, including six sources of critical risk factors, namely national economic, political risk, local people, environment and safety, security risk and force-majeure-related risk factors. A risk factor framework was developed to identify the critical risk factors in the oil and gas construction projects in Yemen.

This research was limited to the oil and gas construction projects.

Practically, this study highlights the risk factors that cause a negative effect on the success of oil and gas construction projects in Yemen. The identification of these factors is the first step in the risk management process to develop strategic responses for risks and enhance the chances of project success.

The identification of risks factors that cause the failure of construction projects helps develop response strategies for these risks, thereby increasing the chances of project success reflected in the oil and gas sector, which is a main tributary of the national economy in developing countries.

This research is the pioneer for future investigations into this vital economic sector. Given the lack of resources and studies in the field of construction projects for the Yemeni oil and gas sector, the Yemeni government, oil companies and researchers in this field are expected to benefit from the results of this study. The critical risk factors specific to the oil and gas construction projects in Yemen should be further investigated with focus only on Yemen and its oil and gas industry players.

This study aims to know the effects of environmental characteristics and business partner relationships on improving innovation performance through the mediation of knowledge management practices (KMPs).

The population of this research was all manufacturing companies engaged in the food and beverage sector categorized into large industries. According to Jakarta’s Badan Penyelenggara Jaminan Sosial (BPJS) Ketenagakerjaan (social insurance administration body of employment), large industries are industries with a number of employees > 100. However, in this research, the total population did not reach 100 but only 89 companies. The analysis unit used in this research was the companies. Data collection for this research relied on questionnaires with closed questions. The questionnaires were then distributed to the sample companies by using enumerator services. In accordance with the hypotheses formulated, the data analysis used in this research was partial least square.

The three findings are the significant and negative effect of environmental characteristics on KMPs, the significant effect of business partner relationships on innovation performance and the insignificant effect of KMPs on innovation performance. The management of food sector manufacturing companies needs to support the activities of generating ideas carried out by employees and support their innovative ideas and creativity. Good cooperation between employees and management is highly needed in an effort to develop company innovation.

This research used the innovation diffusion paradigm and the combination of market-based and knowledge-based paradigms is expected to fill the previous research gap and become the uniqueness and originality of this research. The second originality is that this research examined the role of the KMP variable as the moderating variable. The third originality of this research is the focus on examining the effect of business partner relationships on innovation performance. These three originalities are rarely found in previous studies. Therefore, this research is expected to complete and expand the study of knowledge management and innovation performance.

This research aims to explore the influence of leadership skills (technical, human and conceptual) on organisational citizenship behaviour (OCB) with the mediating role of organisational culture in Vietnamese libraries.

A quantitative methodology was selected to achieve the objective of this research. Data were gathered through paper/pencil surveys from 201 participants working in various Vietnamese libraries. The convergent validity, consistency reliability and discriminant validity of measures were validated challenged via Stata 15.1 software. The findings of the proposed hypotheses were examined via regression analysis.

The results partially supported the hypothesis that leadership skills significantly predict OCB. Regarding the relationship between leadership skills and organisational culture, only human skill significantly affected bureaucracy culture. In turn, only bureaucracy culture significantly affected the OCB of individuals (OCBI) and OCB of organisations (OCBO). Finally, bureaucracy culture significantly mediated the relationship between human skill, OCBI and OCBO.

This study opens the scope of research on leadership skills in Vietnamese libraries by exploring three main gaps in the extant studies of leadership approach, namely, the influence of three leadership skills on OCB, the role of leadership in promoting organisational culture and the underlying mechanism through which leadership skills contribute to OCB with the mediation of organisational culture. The implications of the research are discussed.