bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structural and functional characterization of the novel endo-α(1,4)-fucoidanase Mef1 from the marine bacterium Muricauda eckloniae
Authors: Mikkelsen Maria Dalgaard , Tran Vy Ha Nguyen , Meier Sebastian , Nguyen Thuan Thi , Holck Jesper , Cao Hang Thi Thuy , Van Tran Thi Thanh , Thinh Pham Duc , Meyer Anne S. , Morth Jens Preben 
Published: October 2023

Fucoidanases (EC 3.2.1.–) catalyze the hydrolysis of glycosidic bonds between fucose residues in fucoidans. Fucoidans are a compositionally and structurally diverse class of fucose-containing sulfated polysaccharides that are primarily found in brown seaweeds. Here, the structural characterization of a novel endo-α(1,4)-fucoidanase, Mef1, from the marine bacterium Muricauda eckloniae is presented, showing sequence similarity to members of glycoside hydrolase family 107. Using carbohydrate polyacrylamide gel electrophoresis and nuclear magnetic resonance analyses, it is shown that the fucoidanase Mef1 catalyzes the cleavage of α(1,4)-linkages between fucose residues sulfated on C2 in the structure [-3)-α-L-Fucp2S-(1,4)-α-L-Fucp2S-(1-]
n
in fucoidan from Fucus evanescens. Kinetic analysis of Mef1 activity by Fourier transform infrared spectroscopy revealed that the specific Mef1 fucoidanase activity (Uf) on F. evanescens fucoidan was 0.1 × 10−3 Uf µM
−1. By crystal structure determination of Mef1 at 1.8 Å resolution, a single-domain organization comprising a (β/α)8-barrel domain was determined. The active site was in an extended, positively charged groove that is likely to be designed to accommodate the binding of the negatively charged, sulfated fucoidan substrate. The active site of Mef1 comprises the amino acids His270 and Asp187, providing acid/base and nucleophile groups, respectively, for the hydrolysis of glycosidic bonds in the fucoidan backbone. Electron densities were identified for two possible Ca2+ ions in the enzyme, one of which is partially exposed to the active-site groove, while the other is very tightly coordinated. A water wire was discovered leading from the exterior of the Mef1 enzyme into the active site, passing the tightly coordinated Ca2+ site.
New boundaries for sustainability accounting? A case study of multi-entity accounting and reporting in the agrifood sector
Authors: Maughan Rebecca , O'Dochartaigh Aideen 
Published: October 2023

PurposeThis study examines how accounting tools and techniques are used to create and support membership and reporting boundaries for a multi-entity sustainability scheme. It also considers whether boundary setting for this initiative helps to connect corporate activity with planetary boundaries and the SDGs.Design/methodology/approachA case study of a national agrifood sustainability scheme, analysing extensive documentary data and multi-entity sustainability reports. The concept of partial organising is used to frame the analysis.FindingsAccounting, in the form of planning, verification, target setting, annual review and reporting, can be used to create a membership and a reporting boundary. Accounting tools and techniques support the scheme's standard-setting and monitoring elements. The study demonstrates that the scheme offers innovation in how sustainability reporting is managed. However, it does not currently provide a cumulative assessment of the effect of the sector's activity on ecological carrying capacity or connect this activity to global sustainability indicators.Research limitations/implicationsFuture research can build on this study's insights to further develop our understanding of multi-entity sustainability reporting and accounting's role in organising for sustainability. The authors identify several research avenues including: boundary setting in ecologically significant sectors, integrating global sustainability indicators at sectoral and organisational levels, sustainability controls in multi-entity settings and the potential of multi-entity reporting to provide substantive disclosure.Originality/valueThis paper provides insight into accounting's role in boundary setting for a multi-entity sustainability initiative. It adds to our understanding of the potential of a multi-entity reporting boundary to support connected measurement between corporate activity and global sustainability indicators. It builds on work on partial organising and provides insight into how accounting can support this form of organising for sustainability.
Accounting for the “harms” of social media firms: dialogic accountability and discursive contestation in public hearings
Authors: Yusuff Kolawole , Whittle Andrea , Mueller Frank 
Published: October 2023

PurposeExisting literature has begun to identify the agonistic and contested aspects of the ongoing development of accountability systems. These “contests” are particularly important during periods of change when an accountability “deficit” has been identified, that is, when existing accountability systems are deemed inadequate and requiring revision. The purpose of this paper is to explore one such set of contests in the case of large technology and social media firms: the so-called “big tech”. The authors focus specifically on “big tech” because of increasing societal concerns about the harms associated with their products, services and business practices.Design/methodology/approachThe authors analysed four US Congressional hearings, in which the CEO of Facebook was held to account for the company's alleged breaches and harms. The authors conducted a discourse analysis of the dialogue between the account giver (Mark Zuckerberg) and account holders (Members of Congress) in the oral testimony at the four hearings.FindingsTwo areas of contestation in the dialogue between the account giver and account holders are identified. “Epistemic contests” involved contestation about the “facts” concerning the harms the company had allegedly caused. “Responsibility contests” involved contestation about who (or what) should be held responsible for these harms and according to what standards or criteria.Originality/valueThe study advances critical dialogical accountability literature by identifying two areas of contestation during periods of change in accountability systems. In so doing, they advanced the theory by conceptualising the process of change as underpinned by discursive contests in which multiple actors construct and contest the “problem” with existing accountability systems. The outcomes of these contests are significant, the authors suggest, because they inform the development of reforms to the accountability system governing big tech firms and other industries undergoing similar periods of contestation and change.
Digital transformation preparedness: an exploratory study
Authors: Kumar Anil , Salmona Michelle , Berry Robert , Grummert Sara 
Published: October 2023

PurposeDigital transformation (DT) harnessing the potential of emerging technology creates opportunities and challenges for organizations worldwide. Senior executives view DT as a key initiative for future competitiveness, a view shared by academic researchers. What may challenge the organization is that the vision may be present while preparedness may be lacking. Organizational preparedness depends on managers and employees charged with implementing DT and their perceptions on preparedness are often not aligned with senior executives.Design/methodology/approachIn this research, the authors explore the perceptions of managers and employees on DT preparedness in an organization by gathering data from 579 participants. This study uses an innovative approach to qualitative data analysis using interactive topic modeling.FindingsFindings in this qualitative study provide valuable insights on the perceptions of these individuals and helps understand (a) how they view DT preparedness and (b) may behave in this context. In general DT is well understood, however managers are not keen to change work processes to take advantage of the new digital tools and there appears that generational gap is a barrier to successful DT.Originality/valueSenior executives play a central role communicating the DT vision necessary to inspire managers and employees. As organizations continue to invest large sums of money to explore value creation for customers and stakeholders by leveraging digital technologies, the information systems (IS) discipline can take the lead by asking the question, what can be done to improve the understanding of DT implementation in an organization?
An exploration of employees’ experiences of online food delivery: evidence from employee reviews
Authors: Saydam Mehmet Bahri , Borzyszkowski Jacek , Karatepe Osman M. 
Published: October 2023

Purpose
Online food delivery service has evolved swiftly and stretched the bounds of the catering business. In the gig economy, being a food delivery rider draws employees with the promise of flexibility and independence. To this end, the purpose of this paper is to explore the main themes shared in online reviews by food delivery riders and which of these themes are linked to positive and negative ratings.

Design/methodology/approach
The authors used 729 employee reviews posted on the Glassdoor website. In addition, they used content analysis to examine reviews of Uber Eats online food ordering company shared by food delivery riders on an online platform.

Findings
The results of this study include seven main themes: “earning,” “customers,” “orders,” “tips,” “car,” “flexible schedule” and “app” (navigation). Positive concepts are associated with “earning,” “orders,” “tips” and “flexible schedule.” Negative themes are linked to the “app” (navigation), “car” and “customers.”

Practical implications
Management should consider online reviews as employees’ opinions and voices. Specifically, management should provide financial support to employees for car maintenance, offer insurance for income stability and arrange training programs to enable them to use several tip-enhancing behaviors.

Originality/value
No research has been conducted using online reviews from an employment search engine to investigate employees’ experiences of online food delivery. To the best of the authors’ knowledge, this study is one of the first attempts using user-generated content from an employment search engine to explore employees’ experiences.
Remarkable lives – Robyn Clegg-Gibson in conversation with Robert Hurst
Authors: Clegg-Gibson Robyn , Hurst Robert 
Published: October 2023

Purpose
The purpose of this paper is to share Robyn Clegg-Gibson’s story.

Design/methodology/approach
Robyn wrote a biography of her experiences. Robert then asked a series of questions from the perspective of a mental health academic researcher.

Findings
Robyn shared stories from her life, and how her experiences have shaped her life and herself.

Research limitations/implications
Narratives such as this give us an overview of only a single person’s experiences. However, they allow the person with lived experience to explore their story in depth.

Practical implications
What Robyn has written is very emotional. Her story will give readers an insight into her life and experiences.

Social implications
There is so much to learn from a story like Robyn’s. In particular, from her experiences of police processes after a crime.

Originality/value
To the best of the authors’ knowledge, this is the first time that Robyn has chosen to publish her unique story in the written form. The value of Robyn sharing her story is apparent upon reading it.
The case study methodology in architectural research: evaluation of epistemological adequacy
Authors: Kalua Amos 
Published: October 2023

PurposeThis study sought to populate a concise set of guidelines for use of the case study research methodology and evaluate the adequacy with which the methodology has been used previously within both the positivist and interpretivist domains of architectural research.Design/methodology/approachFirstly, the study set out to establish, from the literature, the nature of the case study methodology. Thereafter, a set of guidelines for adequate use of the methodology was populated. The study, then, proceeded to examine selected architectural research papers that had used the case study methodology in order to evaluate the adequacy with which they had used the methodology. The research papers were randomly drawn from two major architectural research journals publishing scholarly work within the positivist and interpretivist paradigms.FindingsWithin the interpretivist domain of architectural research, the study found that there might exist some inadequacy in the way in which the case study methodology has been used.Originality/valueDespite the popularity of the case study methodology, there have only been limited scholarly attempts at developing a set of guidelines with which to evaluate the adequacy of its usage, particularly within the context of architectural research. This lack of a concise set of guidelines might lead to inappropriate usage of the methodology. This study sought to undertake a review of the usage of the methodology within architectural research with two objectives, namely, populating a concise set of guidelines for use of the methodology and evaluating the adequacy with which the methodology has been used previously.
Multichannel seismic data attenuation compensation via curvelet‐based sparsity promotion
Authors: Mo Tongtong , Yin Ying , Luo Ren , Wang Benfeng 
Published: October 2023

AbstractDue to subsurface viscosity and heterogeneity, the vertical resolution of observed seismic data is decreased after wave propagation, generating nonstationary seismic data with amplitude attenuation and phase distortion. Inverse Q filtering techniques are always used to enhance the vertical resolution of seismic data. However, the majority of inverse Q filtering methods treat attenuation compensation trace by trace, which may produce non‐robust compensation results with poor transverse continuity and amplify noise energy in noisy cases. Thus, we develop a novel sparsity‐promoting inversion‐based multichannel seismic data attenuation compensation approach by introducing a sparse constraint for curvelet coefficients of multichannel compensated data, which takes the transverse continuity of compensated data into account. Besides, the proposed method with a sparse constraint for curvelet coefficients has a better noise‐resistance property, which can attenuate the noise energy in noisy cases during attenuation compensation, improving compensation accuracy and robustness. To improve its computational efficiency, a fast iterative shrinkage–thresholding algorithm is adopted to solve the established lasso problem. Synthetic data examples with different noise levels and two post‐stack field data examples validate the effectiveness of the proposed multichannel method. Its compensation results have superior vertical resolution, transverse continuity and noise robustness in comparison to the conventional single‐channel compensation method using a damped least squares algorithm.
Sublethal nickel toxicity shuts off manganese oxidation and pellicle biofilm formation in Pseudomonas putidaGB‐1
Authors: Marques Mendonca Raissa , Fulton Taylor , Blackwood Christopher , Costello David 
Published: October 2023

AbstractIn sediments, the bioavailability and toxicity of Ni are strongly influenced by its sorption to manganese (Mn) oxides, which largely originate from the redox metabolism of microbes. However, microbes are concurrently susceptible to the toxic effects of Ni, which establishes complex interactions between toxicity and redox processes. This study measured the effect of Ni on growth, pellicle biofilm formation and oxidation of the Mn‐oxidizing bacteria Pseudomonas putida GB‐1. In liquid media, Ni exposure decreased the intrinsic growth rate but allowed growth to the stationary phase in all intermediate treatments. Manganese oxidation was 67% less than control for bacteria exposed to 5 μM Ni and completely ceased in all treatments above 50 μM. Pellicle biofilm development decreased exponentially with Ni concentration (maximum 92% reduction) and was replaced by planktonic growth in higher Ni treatments. In solid media assays, growth was unaffected by Ni exposure, but Mn oxidation completely ceased in treatments above 10 μM of Ni. Our results show that sublethal Ni concentrations substantially alter Mn oxidation rates and pellicle biofilm development in P. putida GB‐1, which has implications for toxic metal bioavailability to the entire benthic community and the environmental consequences of metal contamination.
From ‘I Think’ to ‘I Feel’
Authors: Coleman Stephen 
Published: October 2023

AbstractThis article explores what pollsters, journalists and politicians mean when they refer to the ‘mood’ of a nation, population or community. To what extent does the concept of mood resemble and differ from the notion of ‘public opinion’? It is argued that the ubiquity of mood‐talk reflects a move away from the myth that political action is motivated by rational instrumentalism. Attention to mood takes seriously the force of pre‐cognitive affectivity and its shaping of public disposition; the disorientating effects of diffuse globalism in which experiences and the feelings to which they give rise do not have obvious causes; and the emergence of new spaces in which affects travel and mutate freely, widely and rapidly. The article suggests that we are living in moody times in which attention to the public zeitgeist may be more important than polling responses to discrete issues.
Middle‐income country trap and total factor productivity growth
Authors: Lee Young Hoon , Park Jungsoo 
Published: October 2023

AbstractThis study assessed the factors allowing middle‐income countries to achieve higher income levels and thus escape the middle‐income trap (MIT). By deriving a stochastic production function using the Cornwell–Schmidt–Sickles (CSS) estimator and country panel data, we successfully distinguished between growth due to total factor productivity (TFP) and that attributable to various production inputs after controlling for random shocks and cross‐sectional dependence. We found that TFP growth was the main factor distinguishing middle‐income countries that have and have not escaped from the MIT; the former countries had significantly higher TFP growth.
Actualizing novel trajectories: Chronological and kairotic improvisations
Authors: Fernandez Virginie , Giordano Yvonne , Hällgren Markus 
Published: October 2023

AbstractThe role of first responders during extreme crisis events consists of improvising under time pressure to retain control of the unfolding situation and mitigate harmful effects to help organizations restore their ‘normal’ functioning. This pervasive view of crises as cosmologic events obscures their transformational dimension and their long‐term positive outcomes. In this article, we explore how actors respond to time pressure and vital stakes while identifying and actualizing a novel trajectory. They improvise to overcome limitations, create, and enact a desirable future to seize an opportunity that arises due to unexpected surprises. We argue that the actualization of novel trajectories relies on a combination of the enactment of a duplicate temporality that combines the chronological time‐pressure of the unfolding event and kairotic time, in which critical decisions and actions actualize the desired future. Our contributions to the crisis management literature are twofold. First, we conceptualize chronological and kairotic improvisation practices to acknowledge that crisis response is not only about acting quickly but also about doing the right thing at the right time. Second, we shed light on crises as ‘cosmologic’ events, showing that they can be a point of origin for long‐term positive outcomes. Finally, we advocate for a deeper and fine‐grained consideration of time and temporality to advance crisis management studies.
Homicide or suicide? A probabilistic approach for the evaluation of the manner of death in sharp force fatalities
Authors: Irmici Marco , D'Aleo Michele , Pelletti Guido , Pirani Filippo , Giorgetti Arianna , Fais Paolo , Pelotti Susi 
Published: October 2023

AbstractThe role of forensic science can be defined as providing relevant opinions to assist investigators and courts of law in answering questions. The Likelihood Ratio (LR) provides a quantitative and logical approach to communicating the strength of expert evidence. We reviewed existing forensic literature on sharp force fatalities, focusing on studies reporting the manner of death and the frequency of some characteristics that are traditionally assessed. Four studies were included, resulting in a database of 173 suicides and 354 homicides. The LR of each of the characteristic under both hypotheses (suicide and homicide) was obtained. Subsequently, the LR was computed in six fatalities with known manner of death, three suicides and three homicides, by multiplying the corresponding LR of each individual characteristic. LR ranged from 115 to 140,250 in suicidal cases and from 9 to 2728 in homicidal cases. Compared to other fields of forensic science where LR is used extensively, the values obtained in our cases of sharp force fatalities is low. However, in forensic pathology there is evidence that is outside the expert's opinion, and it is for the trier of fact, such as the judge or jury, to draw conclusions. Nevertheless, the LR serves as a tool for interpreting and weighing evidence while maintaining the distinct roles of the trier of fact and the expert. To comprehensively apply the LR in the field of sharp force deaths, it will be necessary to standardize the methodology of investigation and data collection in descriptive studies.
Complex interactions among insect viruses‐insect vector‐arboviruses
Authors: Wang Hui , Chen Qian , Wei Taiyun 
Published: October 2023

AbstractInsects are the host or vector of diverse viruses including those that infect vertebrates, plants, and fungi. Insect viruses reside inside their insect hosts and are vertically transmitted from parent to offspring. The insect virus–host relationship is intricate, as these viruses can impact various aspects of insect biology, such as development, reproduction, sex ratios, and immunity. Arthropod‐borne viruses (arboviruses) that cause substantial global health or agricultural problems can also be vertically transmitted to insect vector progeny. Multiple infections with insect viruses and arboviruses are common in nature. Such coinfections involve complex interactions, including synergism, dependence, and antagonism. Recent studies have shed light on the influence of insect viruses on the competence of insect vectors for arboviruses. In this review, we focus on the biological effects of insect viruses on the transmission of arboviruses by insects. We also discuss the potential mechanisms by which insect viruses affect the ability of hosts to transmit arboviruses, as well as potential strategies for disease control through manipulation of insect viruses. Analyses of the interactions among insect vectors, insect viruses and arboviruses will provide new opportunities for development of innovative strategies to control arbovirus transmission.