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  1. Article: Techno-Economic Assessment and Sensitivity Analysis of Glycerol Valorization to Biofuel Additives via Esterification.

    Pandit, Krutarth / Jeffrey, Callum / Keogh, John / Tiwari, Manishkumar S / Artioli, Nancy / Manyar, Haresh G

    Industrial & engineering chemistry research

    2023  Volume 62, Issue 23, Page(s) 9201–9210

    Abstract: Glycerol is a valuable feedstock, produced in biorefineries as a byproduct of biodiesel production. Esterification of glycerol with acetic acid yields a mixture of mono-, di-, and triacetins. The acetins are commercially important value-added products ... ...

    Abstract Glycerol is a valuable feedstock, produced in biorefineries as a byproduct of biodiesel production. Esterification of glycerol with acetic acid yields a mixture of mono-, di-, and triacetins. The acetins are commercially important value-added products with a wide range of industrial applications as fuel additives and fine chemicals. Esterification of glycerol to acetins substantially increases the environmental sustainability and economic viability of the biorefinery concept. Among the acetins, diacetin (DA) and triacetin (TA) are considered high-energy-density fuel additives. Herein, we have studied the economic feasibility of a facility producing DA and TA by a two-stage process using 100,000 tons of glycerol per year using Aspen Plus. The capital costs were estimated by Aspen Process Economic Analyzer software. The analysis indicates that the capital costs are 71 M$, while the operating costs are 303 M$/year. The gross profit is 60.5 M$/year, while the NPV of the project is 235 M$ with a payback period of 1.7 years. Sensitivity analysis has indicated that the product price has the most impact on the NPV.
    Language English
    Publishing date 2023-05-31
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484436-9
    ISSN 1520-5045 ; 0888-5885
    ISSN (online) 1520-5045
    ISSN 0888-5885
    DOI 10.1021/acs.iecr.3c00964
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Tracking reproductive events: Hoof growth and steroid hormone concentrations in hair and hoof tissues in moose (

    Keogh, Mandy J / Thompson, Daniel P / Crouse, John A

    Conservation physiology

    2023  Volume 11, Issue 1, Page(s) coad097

    Abstract: Measurements of reproductive and stress-related hormones in keratinous tissues (e.g. hair, claws ...

    Abstract Measurements of reproductive and stress-related hormones in keratinous tissues (e.g. hair, claws, hooves, baleen) can provide a record of stress and reproductive response in wildlife. We evaluated a method to collect keratin tissue from hooves of immobilized moose (
    Language English
    Publishing date 2023-12-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 2721508-8
    ISSN 2051-1434
    ISSN 2051-1434
    DOI 10.1093/conphys/coad097
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Barriers to Blockchain Adoption in the Circular Economy

    Abderahman Rejeb / Karim Rejeb / John G. Keogh / Suhaiza Zailani

    Sustainability, Vol 14, Iss 3611, p

    A Fuzzy Delphi and Best-Worst Approach

    2022  Volume 3611

    Abstract: Blockchain can help to fundamentally alter aspects of circular economy (CE) activities and overcome pressing sustainability issues. Nevertheless, limited studies have investigated the barriers to blockchain adoption in the CE. This study aims to close ... ...

    Abstract Blockchain can help to fundamentally alter aspects of circular economy (CE) activities and overcome pressing sustainability issues. Nevertheless, limited studies have investigated the barriers to blockchain adoption in the CE. This study aims to close the knowledge gap by providing a comprehensive review of the barriers hampering the adoption and integration of blockchain technology in the CE. An integrated approach based on fuzzy Delphi and best-worst methods has been applied to analyze and rank the barriers. Sixteen barriers to blockchain adoption in the CE were identified from the academic literature and validated by a panel of experts. The findings from the fuzzy Delphi technique identified ten significant barriers for further analysis. Then, using the best-worst method, the optimal weights were determined based on the experts’ judgment to recognize the importance of each barrier. The findings from this method showed that a lack of knowledge and management support, reluctance to change and technological immaturity are the most significant barriers. In contrast, the least significant barriers are investment costs, security risks, and scalability issues. Theoretically, this study is the first to apply an integrated approach combining fuzzy Delphi and best-worst techniques to prioritze the barriers to blockchain adoption in the CE. It also provides valuable insights for managers and decision-makers that can be used to optimize blockchain implementations in the CE.
    Keywords blockchain ; circular economy ; barriers ; technology ; sustainability ; best-worst method ; Environmental effects of industries and plants ; TD194-195 ; Renewable energy sources ; TJ807-830 ; Environmental sciences ; GE1-350
    Subject code 338
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: High-Depth PRNP Sequencing in Brains With Sporadic Creutzfeldt-Jakob Disease.

    Murley, Alexander G / Nie, Yu / Golder, Zoe / Keogh, Michael John / Smith, Colin / Ironside, James W / Chinnery, Patrick F

    Neurology. Genetics

    2023  Volume 9, Issue 1, Page(s) e200054

    Abstract: Background and objectives: Sporadic Creutzfeldt-Jakob disease (sCJD) has established genetic risk factors, but, in contrast to genetic and acquired CJD, the initial trigger for misfolded prion aggregation and spread is not known. In this study, we ... ...

    Abstract Background and objectives: Sporadic Creutzfeldt-Jakob disease (sCJD) has established genetic risk factors, but, in contrast to genetic and acquired CJD, the initial trigger for misfolded prion aggregation and spread is not known. In this study, we tested the hypotheses that pathologic somatic variants in the prion gene
    Methods: High-depth amplicon-based short read sequencing of the
    Results: Two sCJD cases had somatic (variant allele frequency 0.5-1%)
    Discussion: Somatic variants in
    Language English
    Publishing date 2023-01-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2818607-2
    ISSN 2376-7839
    ISSN 2376-7839
    DOI 10.1212/NXG.0000000000200054
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Blockchain technology in the smart city: a bibliometric review.

    Rejeb, Abderahman / Rejeb, Karim / Simske, Steven J / Keogh, John G

    Quality & quantity

    2021  Volume 56, Issue 5, Page(s) 2875–2906

    Abstract: Blockchain can function as a foundational technology with numerous applications in smart cities. The objective of this paper is twofold. First, it provides a detailed overview of the extant literature on blockchain applications in smart cities; second, ... ...

    Abstract Blockchain can function as a foundational technology with numerous applications in smart cities. The objective of this paper is twofold. First, it provides a detailed overview of the extant literature on blockchain applications in smart cities; second, it reveals the trends and suggests future research directions for scholars who wish to contribute to this rapidly growing field. We conducted a bibliometric review using a keyword co-occurrence network and article co-citation analysis. The analysis includes the assessment of 148 articles published between 2016 and 2020 in 76 academic journals. The review results demonstrate that the number of articles devoted to the study of blockchain applications and smart cities has increased exponentially in recent years. More importantly, the research identifies some of the most influential studies in this area. The paper discusses trends and highlights the challenges related to the deployment of blockchain in smart cities. To the authors' best knowledge, this represents the first study to review the literature from leading journals on blockchain applications in smart cities using bibliometric techniques.
    Language English
    Publishing date 2021-10-06
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2003280-8
    ISSN 1573-7845 ; 0033-5177
    ISSN (online) 1573-7845
    ISSN 0033-5177
    DOI 10.1007/s11135-021-01251-2
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  6. Article ; Online: Examining Knowledge Diffusion in the Circular Economy Domain: a Main Path Analysis.

    Rejeb, Abderahman / Rejeb, Karim / Zailani, Suhaiza / Kayikci, Yasanur / Keogh, John G

    Circular economy and sustainability

    2022  Volume 3, Issue 1, Page(s) 125–166

    Abstract: The circular economy (CE) field has recently attracted significant interest from academics and practitioners. CE represents a departure from the linear economy, which is characterised by unsustainable resource production and consumption. The growing ... ...

    Abstract The circular economy (CE) field has recently attracted significant interest from academics and practitioners. CE represents a departure from the linear economy, which is characterised by unsustainable resource production and consumption. The growing number of publications necessitates a comprehensive analysis of this field. This is the first systematic examination of the knowledge base and knowledge diffusion pathways in the CE domain. We analyse a Web of Science dataset containing 5431 articles published between 1970 and 2020. To create a comprehensive review of the CE domain, we conducted a keyword co-occurrence network analysis. We examined four distinct types of main paths using the main path analysis (MPA) technique: forward, backward, global, and key-route. According to the analyses, CE research focuses on six primary research themes: CE and sustainability, bioeconomy, CE practices, lifecycle assessment and industrial symbiosis, construction activities, and waste management. In addition, the MPA demonstrates that the CE literature has recently focused on Industry 4.0 technologies and their contribution to CE. This is the first attempt to depict the genealogy of CE research so that scholars can comprehend the domain's evolutionary structure, identify hot topics, and capture the history, development status, and potential future directions of CE research.
    Language English
    Publishing date 2022-07-07
    Publishing country Switzerland
    Document type Journal Article ; Review
    ISSN 2730-5988
    ISSN (online) 2730-5988
    DOI 10.1007/s43615-022-00189-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Modeling enablers for blockchain adoption in the circular economy

    Abderahman Rejeb / Suhaiza Zailani / Karim Rejeb / Horst Treiblmaier / John G. Keogh

    Sustainable Futures, Vol 4, Iss , Pp 100095- (2022)

    2022  

    Abstract: Blockchain technology can play a crucial role to facilitate the transition from a linear to a circular economy. This article evaluates those enablers that influence technology adoption in the circular economy. A comprehensive literature review and ... ...

    Abstract Blockchain technology can play a crucial role to facilitate the transition from a linear to a circular economy. This article evaluates those enablers that influence technology adoption in the circular economy. A comprehensive literature review and feedback from experts revealed nineteen critical enablers. The Decision-Making Trial and Evaluation Laboratory (DEMATEL) methodology was used to determine the cause-and-effect relationships between them. The findings identified five critical causal enablers: transparency, security, smart contracts, traceability, and enhanced collaboration. Effect enablers were identified as immutability, decentralization, privacy, automation, information sharing, and enhanced regulation.
    Keywords Blockchain ; Circular economy ; Enablers ; Sustainability ; DEMATEL ; Environmental sciences ; GE1-350 ; Technology ; T
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article: Enablers of Augmented Reality in the Food Supply Chain: A Systematic Literature Review

    Rejeb, Abderahman / Rejeb, Karim / Keogh, John G.

    Journal of foodservice business research. 2021 July 04, v. 24, no. 4

    2021  

    Abstract: The food industry represents one of the most critically important sectors of the economy. Food is a basic necessity for human life and requires specialized handling, preparation, and logistics to be safe for human consumption. Moreover, food supply ... ...

    Abstract The food industry represents one of the most critically important sectors of the economy. Food is a basic necessity for human life and requires specialized handling, preparation, and logistics to be safe for human consumption. Moreover, food supply chains have become more globalized, fragmented, and complex. Food industry stakeholders are forced to reconsider conventional ways of managing food chains and coping with the latest technology innovation trends. As technology unlocks several opportunities in supply chains, food businesses have a vested interest in exploring Augmented Reality (AR). AR denotes the technology of overlaying virtual objects upon the real-world environment. Despite being a well-established technology, AR possibilities in the food supply chain remain an unexplored research area. Therefore, to fill this knowledge gap and capture the latest developments in this field, we conducted a systematic literature review. Fifty-one (51) publications were thoroughly analyzed to identify the enablers of AR in the food industry. Findings revealed five main areas where AR potentially offers substantial business value. These include food process efficiencies, food decision-making, food marketing, food training, and food safety. Finally, research contributions, trajectories and limitations were highlighted.
    Keywords augmented reality ; decision making ; food availability ; food safety ; food service ; food supply chain ; humans ; research ; stakeholders
    Language English
    Dates of publication 2021-0704
    Size p. 415-444.
    Publishing place Routledge
    Document type Article
    ZDB-ID 2094789-6
    ISSN 1537-8039 ; 1537-8020
    ISSN (online) 1537-8039
    ISSN 1537-8020
    DOI 10.1080/15378020.2020.1859973
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: Examining the interplay between artificial intelligence and the agri-food industry

    Abderahman Rejeb / Karim Rejeb / Suhaiza Zailani / John G. Keogh / Andrea Appolloni

    Artificial Intelligence in Agriculture, Vol 6, Iss , Pp 111-

    2022  Volume 128

    Abstract: Artificial intelligence (AI) has advanced at an astounding rate and transformed numerous economic sectors. Nevertheless, a comprehensive understanding of how AI can improve the agri-food industry is lacking. In addition, there is a notable dearth of ... ...

    Abstract Artificial intelligence (AI) has advanced at an astounding rate and transformed numerous economic sectors. Nevertheless, a comprehensive understanding of how AI can improve the agri-food industry is lacking. In addition, there is a notable dearth of research on AI that investigates the influence of AI on agri-food resources and educates practitioners on the significance of knowledge-based and smart agriculture. We utilised bibliometric analysis to investigate the present state of the art and emerging trends in the relationship between AI and the agri-food industry. The research identified three distinct growth phases and the most prevalent AI strategies in the industry. In addition, we analysed key trends and offered researchers and practitioners insightful recommendations for future research. Using resource-based view (RBV) as the theoretical lens, this study established a framework emphasising the long-term effects of AI on various agri-food resources and proposed several research propositions. In addition, AI-related obstacles have been identified and categorised into four major categories. Lastly, the originality of the article lies in its numerous research suggestions and recommendations for advancing the AI field in the agri-food industry.
    Keywords Artificial intelligence ; Agriculture ; Farming ; Machine learning ; Deep learning ; Bibliometric analysis ; S
    Subject code 330
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher KeAi Communications Co., Ltd.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Solvent Free Upgrading of 5-Hydroxymethylfurfural (HMF) with Levulinic Acid to HMF Levulinate Using Tin Exchanged Tungstophosphoric Acid Supported on K-10 Catalyst.

    Tiwari, Manishkumar S / Wagh, Dipti / Dicks, Jennifer Sarah / Keogh, John / Ansaldi, Michela / Ranade, Vivek V / Manyar, Haresh G

    ACS organic & inorganic Au

    2022  Volume 3, Issue 1, Page(s) 27–34

    Abstract: The manufacture of high-value products from biomass derived platform chemicals is becoming an integral part of the biorefinery industry. In this study, we demonstrate a green catalytic process using solvent free conditions for the synthesis of ... ...

    Abstract The manufacture of high-value products from biomass derived platform chemicals is becoming an integral part of the biorefinery industry. In this study, we demonstrate a green catalytic process using solvent free conditions for the synthesis of hydroxymethylfurfural (HMF) levulinate from HMF and levulinic acid (LA) over tin exchanged tungstophosphoric acid (DTP) supported on K-10 (montmorillonite K-10 clay) as the catalyst. The structural properties of solid acid catalysts were characterized by using XRD, FT-IR, UV-vis, titration, and SEM techniques. Partial exchange of the H
    Language English
    Publishing date 2022-10-03
    Publishing country United States
    Document type Journal Article
    ISSN 2694-247X
    ISSN (online) 2694-247X
    DOI 10.1021/acsorginorgau.2c00027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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