bluuebunny/crossref_metadata_2025 huggingface dataset:
Structural analysis of nanocrystals by pair distribution function combining electron diffraction with crystal tilting
Authors: Guo Linshuo , Wu Shitao , Zhou Zhengyang , Ma Yanhang
Published: February 2024

As an important characterization method, pair distribution function (PDF) has been extensively used in structural analysis of nanomaterials, providing key insights into the degree of crystallinity, atomic structure, local disorder etc. The collection of scattering signals with good statistics is necessary for a reliable structural analysis. However, current conventional electron diffraction experiments using PDF (ePDF) are limited in their ability to acquire continuous diffraction rings for large nanoparticles. Herein, a new method – tilt-ePDF – is proposed to improve the data quality and compatibility of ePDF by a combination of electron diffraction and specimen tilting. In the present work, a tilt-series of electron diffraction patterns was collected from gold nanoparticles with three different sizes and a standard sample polycrystalline aluminium film for ePDF analysis. The results show that tilt-ePDF can not only enhance the continuity of diffraction rings, but can also improve the signal-to-noise ratio in the high scattering angle range. As a result, compared with conventional ePDF data, tilt-ePDF data provide structure parameters with a better accuracy and lower residual factors in the refinement against the crystal structure. This method provides a new way of utilizing ePDF to obtain accurate local structure information from nanoparticles.
Bis[μ-bis(pyridin-2-yl)methanone oxime-κ3
N:,N′,N′′]bis[diacetato-κ2
O,O′;κO-zinc(II)]
Authors: Crundwell Guy , Crundwell Nigel E. , Westcott Barry L.
Published: February 2024

The structure of the title complex, [Zn2(C2H3O2)4(C11H9N3O)2], is triclinic containing half of the molecule in the asymmetric unit. Each zinc atom is coordinated to a pyridyl and oxime nitrogen from one di-2-pyridyl ketone oxime (dpko) ligand and a third nitrogen from the other dpko pyridyl ring. Additionally, each zinc is coordinated to two acetato anions, one of which is bidentate and the other monodentate. The uncoordinated oxygen of the monodentate acetato group is involved in a hydrogen bond with the oxime hydrogen. The packing in the crystal is assisted by weak C—H...O interactions between acetato groups and neighboring pyridyl rings.
Can we design food taxes to reduce agricultural greenhouse gas emissions in China? A perspective from animal protein intake of low-income populations
Authors: Chen Jiao , Sun Dingqiang , Zhong Funing , Ren Yanjun , Li Lei
Published: February 2024

Purpose

Studies on developed economies showed that imposing taxes on animal-based foods could effectively reduce agricultural greenhouse gas emissions (AGHGEs), while this taxation may not be appropriate in developing countries due to the complex nutritional status across income classes. Hence, this study aims to explore optimal tax rate levels considering both emission reduction and nutrient intake, and examine the heterogenous effects of taxation across various income classes in urban and rural China.

Design/methodology/approach

The authors estimated the Quadratic Almost Ideal Demand System model to calculate the price elasticities for eight food groups, and performed three simulations to explore the relative optimal tax regions via the relationships between effective animal protein intake loss and AGHGE reduction by taxes.

Findings

The results showed that the optimal tax rate bands can be found, depending on the reference levels of animal protein intake. Designing taxes on beef, mutton and pork could be a preliminary option for reducing AGHGEs in China, but subsidy policy should be designed for low-income populations at the same time. Generally, urban residents have more potential to reduce AGHGEs than rural residents, and higher income classes reduce more AGHGEs than lower income classes.

Originality/value

This study fills the gap in the literature by developing the methods to design taxes on animal-based foods from the perspectives of both nutrient intake and emission reduction. This methodology can also be applied to analyze food taxes and GHGE issues in other developing countries.
Does reaction to controversy in corporate narratives depend on its significance for various stakeholders?
Authors: Waniak-Michalak Halina , Michalak Jan
Published: February 2024

Purpose

The study aims to determine whether a relationship exists between the potential significance of corporate controversies for stakeholders and how organisations respond to them in their annual and sustainability reports.

Design/methodology/approach

This paper employs content analysis on annual and sustainability reports of 48 listed companies from the Refinitiv database. The logit regression was used to estimate the model.

Findings

The study revealed that the main factors increasing the probability of a controversial issue being addressed in a corporate report are the controversy’s potential significance, companies’ financial performance and lawsuits.

Research limitations/implications

Our study has three major limitations. These are a relatively small sample of companies and reports, focusing on disclosures made in corporate reports and omitting other channels of communication, for example, social media, and a certain amount of subjectivity in the process of coding information.

Social implications

Former studies show that corporations face a serious risk of their hypocritical strategies becoming too evident for stakeholder groups. Our findings suggest that the risk is already materialising and may undermine the idea of CSR and sustainability reporting.

Originality/value

Our research focuses on high-profile adverse incidents widely reported in the media, the omission of which from corporate reports seems to constitute a particular case of organised hypocrite. It also demonstrates that companies use an impression management strategy to defuse adverse publicity and that major controversies cause minor ones to be omitted from their reports.
Exploring effective incentive policies for sustainable development of green buildings in China: based on evolutionary game theory and numerical simulation analysis
Authors: Fan Chunmei , Li Xiaoyue
Published: February 2024

Purpose

This study reveals the green building development path and analyzes the optimal government subsidy equilibrium through evolutionary game theory and numerical simulation. This was done to explore the feasible measures and optimal incentives to achieve higher levels of green building in China.

Design/methodology/approach

First, the practice of green building in China was analyzed, and the specific influencing factors and incentive measures for green building development were extracted. Second, China-specific evolutionary game models were constructed between developers and homebuyers under the market regulation and government incentive mechanism scenarios, and the evolutionary paths were analyzed. Finally, real-case numerical simulations were conducted, subsidy impacts were mainly analyzed and optimal subsidy equilibriums were solved.

Findings

(1) Simultaneously subsidizing developers and homebuyers proved to be the most effective measure to promote the sustainability of green buildings. (2) The sensitivity of developers and homebuyers to subsidies varied across scenarios, and the optimal subsidy level diminished marginally as building greenness and public awareness increased. (3) The optimal subsidy level for developers was intricately tied to the building greenness benchmark. A higher benchmark intensified the developer’s responsiveness to losses, at which point increasing subsidies were justified. Conversely, a reduction in subsidy might have been appropriate when the benchmark was set at a lower level.

Practical implications

The expeditious advancement of green buildings holds paramount importance for the high-quality development of the construction industry. Nevertheless, the pace of green building expansion in China has experienced a recent deceleration. Drawing insights from the practices of green building in China, the exploration of viable strategies and the determination of optimal government subsidies stand as imperative initiatives. These endeavors aim to propel the acceleration of green building proliferation and materialize high-quality development at the earliest juncture possible.

Originality/value

The model is grounded in China’s green building practices, which makes the conclusions drawn more specific. Furthermore, research results provide practical references for governments to formulate green building incentive policies.
Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method
Authors: Algehyne Ebrahem A.
Published: February 2024

Purpose

In recent times, there has been a growing interest in buoyancy-induced heat transfer within confined enclosures due to its frequent occurrence in heat transfer processes across diverse engineering disciplines, including electronic cooling, solar technologies, nuclear reactor systems, heat exchangers and energy storage systems. Moreover, the reduction of entropy generation holds significant importance in engineering applications, as it contributes to enhancing thermal system performance. This study, a numerical investigation, aims to analyze entropy generation and natural convection flow in an inclined square enclosure filled with Ag–MgO/water and Ag–TiO2/water hybrid nanofluids under the influence of a magnetic field. The enclosure features heated slits along its bottom and left walls. Following the Boussinesq approximation, the convective flow arises from a horizontal temperature difference between the partially heated walls and the cold right wall.

Design/methodology/approach

The governing equations for laminar unsteady natural convection flow in a Newtonian, incompressible mixture is solved using a Marker-and-Cell-based finite difference method within a customized MATLAB code. The hybrid nanofluid’s effective thermal conductivity and viscosity are determined using spherical nanoparticle correlations.

Findings

The numerical investigations cover various parameters, including nanoparticle volume concentration, Hartmann number, Rayleigh number, heat source/sink effects and inclination angle. As the Hartmann and Rayleigh numbers increase, there is a significant enhancement in entropy generation. The average Nusselt number experiences a substantial increase at extremely high values of the Rayleigh number and inclination.

Practical implications

This numerical investigation explores advanced applications involving various combinations of influential parameters, different nanoparticles, enclosure inclinations and improved designs. The goal is to control fluid flow and enhance heat transfer rates to meet the demands of the Fourth Industrial Revolution.

Originality/value

In a 90° tilted enclosure, the addition of 5% hybrid nanoparticles to the base fluid resulted in a 17.139% increase in the heat transfer rate for Ag–MgO nanoparticles and a 16.4185% increase for Ag–TiO2 nanoparticles compared to the base fluid. It is observed that a 5% nanoparticle volume fraction results in an increased heat transfer rate, influenced by variations in both the Darcy and Rayleigh numbers. The study demonstrates that the Ag–MgO hybrid nanofluid exhibits superior heat transfer and fluid transport performance compared to the Ag–TiO2 hybrid nanofluid. The simulations pertain to the use of hybrid magnetic nanofluids in fuel cells, solar cavity receivers and the processing of electromagnetic nanomaterials in enclosed environments.
Relational models and entrepreneurship ecosystems
Authors: Muldoon Jeffrey , Bendickson Joshua S. , Liguori Eric W. , Solomon Shelby
Published: February 2024

Purpose

Using social relations theory, we argue that entrepreneurship ecosystems must also include relationships such as market pricing, equality matching, authority ranking and communal sharing to be successful and thrive.

Design/methodology/approach

We theorize using Fiske’s typology that a successful entrepreneurial system must have certain characteristics to be successful.

Findings

In doing so, we suggest an alternative perspective of the role of exchange relationships in ecosystems which considers both the geographic context and social relationships as equally important ecosystem components. Our contributions include (1) exposing social processes as the explanatory mechanism for exchanges instead of solely market forces, (2) illustrating the role of regional cultural differences in exchanges and (3) emphasizing how entrepreneurs can better realize ecosystem benefits through understanding the methods of exchange in these ecosystems.

Originality/value

Social relationships include a wide variety of different types of resources and exchange mechanisms, so by their inclusion into the entrepreneurship ecosystem literature, a more complete view of ecosystems is possible.
Measuring the teachers’ talent management
Authors: Liechti García Nathalie , Sesé Albert
Published: February 2024

Purpose

A crucial issue in educational management refers to helping teachers reach their full potential and manage their talents. Although managing talent is advised as an essential resource for organizational transformation to maximize performance and to promote a school’s knowledge capital increase, Teachers’ talent management (TTM) is not an agreed-upon concept in the literature. The aim of this study is threefold: (1) to propose a theoretical and operational TTM definition, (2) to develop a test to measure TTM and (3) to discuss the value of TTM implementation in educational settings.

Design/methodology/approach

A psychometric validation design according to international standards for test development is implemented. A cross-sectional intentional sampling with 200 schools is used for obtaining reliability and validity evidence. We operationalized TTM using 9 factors (10 items per factor, 6-point Likert scale): attraction, selection, development, retention, succession, climate, culture, evaluation and knowledge management.

Findings

Results show adequate evidence of reliability and validity, focusing on items' content and latent structure. The combined use of structural equation models (SEM) and psychometric networks (PN) detects a six-factor model with a test reduced version including 61 items, getting 64.28% of the total explained variance and adequate reliability indices and factor loadings.

Originality/value

The Teachers' Talent Management Assessment Test (TTMAT) can contribute educational institutions to create a culture of excellence and deliver the best possible education to their students. Educational transformation will only happen if teachers are professionalized, trained, motivated and supported to inspire and to guide their learners to reach their objectives and well-being.
It’s my pleasure to serve you! Examining the job contact, happiness, prosocial motivation, and innovative work behavior link
Authors: Almazrouei Safeya , Bani-Melhem Shaker , Mohd-Shamsudin Faridah
Published: February 2024

Purpose

Job characteristics can potentially influence employees’ attitudes and behaviors. However, their impact on employees’ innovative behaviors, particularly in public sector organizations, has received little scholarly attention. Based on relational job design theory and the broaden-and-build theory of positive emotions, this study aims to examine the effect of job contact on public sector employees’ innovative work behavior through the mediator of happiness at work. It also assesses whether prosocial motivation strengthens the influence of job contact on innovative work behavior (via happiness at work).

Design/methodology/approach

The model was examined on a sample of 180 employee-supervisor dyads (90 supervisors and 180 employees) recruited from various government departments in the United Arab Emirates.

Findings

The findings support the proposed moderated mediation model in which job contact positively and significantly impacts innovative work behavior. The association between job contact and innovative behavior via happiness at work is found to be stronger for employees who are highly prosocially motivated.

Originality/value

The findings offer prescriptive insights into public sector employee happiness and prosocial motivation by illustrating when and how job contact influences innovative work behavior. The authors also present relevant managerial recommendations for promoting public sector employees’ innovative behavior.
Principles for analyzing, designing and evaluating the situated use of intelligent machines
Authors: Alter Steven
Published: February 2024

Purpose

The lack of conceptual approaches for organizing and expressing capabilities, usage and impact of intelligent machines (IMs) in work settings is an obstacle to moving beyond isolated case examples, domain-specific studies, 2 × 2 frameworks and expert opinion in discussions of IMs and work. This paper's purpose is to illuminate many issues that often are not addressed directly in research, practice or punditry related to IMs. It pursues that purpose by presenting an integrated approach for identifying and organizing important aspects of analysis and evaluation related to IMs in work settings. 

Design/methodology/approach

This paper integrates previously published ideas related to work systems (WSs), smart devices and systems, facets of work, roles and responsibilities of information systems, interactions between people and machines and a range of criteria for evaluating system performance.

Findings

Eight principles outline a straightforward and flexible approach for analyzing and evaluating IMs and the WSs that use them. Those principles are based on the above ideas.

Originality/value

This paper provides a novel approach for identifying design choices for situated use of IMs. The breadth, depth and integration of this approach address a gap in existing literature, which rarely aspires to this paper’s thoroughness in combining ideas that support the description, analysis, design and evaluation of situated uses of IMs.
Interactive impact of transformational leadership and organizational innovation on online knowledge sharing: a knowledge management perspective
Authors: Nguyen Mai , Sharma Piyush
Published: February 2024

Purpose

As knowledge management increasingly becomes critical for the success of professional service firms, this paper uses social exchange theory to investigate the interactive impact of transformational leadership and organizational innovation on online knowledge sharing by employees in professional service firms. This study aims to investigate the mediating roles of job autonomy and job engagement in this process.

Design/methodology/approach

Data were collected from a survey of 350 frontline employees in professional service providers, including banking, telecommunication and insurance. Structural equation modeling was used for data analysis.

Findings

The results show that transformational leadership positively affects job autonomy, which in turn has a positive impact on online knowledge sharing through job engagement. Thus, job autonomy and job engagement mediate the relationship between transformational leadership and online knowledge sharing. Finally, organizational innovation moderates the relationship between transformational leadership and job autonomy.

Originality/value

This paper extends the knowledge management literature by studying the impact of transformational leadership on the online knowledge-sharing behavior and exploring the focal roles of job autonomy and job engagement in online-sharing behavior in professional service firms. The findings also provide useful implications for practitioners to help them engage employees in the adoption of digital technologies to optimize outcomes.
Soft skills in the tourism industry of the future: a comparison between Italy and Spain
Authors: Rienda Laura , Ruiz-Fernández Lorena , Andreu Rosario
Published: February 2024

Purpose

The harmonisation of university degrees at the European level leads us to believe that training needs are addressed in the same way in different countries. However, the inevitable adaptation to the changing environment faced by companies requires a continuous adjustment between training and future needs, according to the sector. The aim of this paper is to compare two leading and culturally similar countries in the tourism sector in order to determine whether training is being provided homogeneously in tourism higher education and whether more specific training is desired to meet the needs of the sector in each country.

Design/methodology/approach

This study is part of the European Next Tourism Generation (NTG) Project, the first European partnership to foster a collaborative and productive relationship between the education system and the tourism industry. A mixed research study was conducted with the purpose of development, i.e. with the intention that the results of one method (qualitative) are used to assist the development of the other method (quantitative) and an exploratory sequential design. Both qualitative (29 interviews) and quantitative (509 tourism organisations) methods are used.

Findings

For a sector that has undergone significant changes in recent years, the results show the differences between countries around the current level of soft skills of employees, the level they will need to develop in the future and the gaps that those responsible for training future employees in the sector need to focus on for the 2030 horizon.

Practical implications

Several recommendations have emerged from this paper: to complement higher education, to achieve a better link between the business world and future workers; to provide much more incentives for international student mobility, which will allow students to develop intercultural soft skills before they enter the world of work, and to propose the creation of a social network to share, communicate and learn about resources specific to the tourism industry.

Originality/value

Since the Bologna Plan, higher education institutions have been tasked with preparing students for the world of work and developing the employability of graduates. The link between the professional world (companies) and the educational world (training centres) is a crucial factor in determining students' future skills and needs. When educational programmes respond to the needs of industry, the university can gain a competitive advantage. Therefore, some authors suggest the need for coordination and regular communication between business and training centres, thus improving the competitiveness of companies and reducing the gap that currently exists. In this paper, comparing two culturally similar countries with a recognised trajectory in the tourism sector, we will try to observe this gap and propose interesting options for the future of the sector.
Green encapsulation of textile dyes using lecithin to increase dyeing performance
Authors: Elhadad Shimaa S.M. , Kafafy Hany , Mashaly Hamada , El-Sayed Ahmed Ali
Published: February 2024

Purpose

The purpose of this study is to use liposome technology in the treatment of fabrics textiles because of its efficient energy saving, reducing time and temperature.

Design/methodology/approach

The newly prepared lecithin liposome was used to encapsulate dyes for the purpose of increasing dyeing affinity. Different ratios of commercially available lecithin liposomes (1%, 3%, 5% and 7%) were used simultaneously in the dyeing of cotton and wool fabrics. The treated fabrics (cotton and wool fabrics) were confirmed using different analytical procedures such as scanning electron microscope (SEM), Fourier-transition infrared spectroscopy, ultraviolet protection factor, colour strength (K|S) measurements and fastness measurements.

Findings

The results show that increasing liposome ratios in dyeing baths leads to increased dyeing affinity for cotton and wool fabrics compared with conventional dyeing without using liposomes. In addition to that, the colour strength values, infrared spectra, SEM and fastness properties of non-liposome-dyed fabrics and liposome-dyed fabrics were investigated.

Originality/value

The research paper provides broad spectrum of green encapsulation fabrics using liposome technology to perform the dye stability, dye strength and fastness.
University social responsibility and sustainable development: illustration of adapted practices by two Tunisian Universities
Authors: Ouragini Imen , Ben Hassine Louzir Anissa
Published: February 2024

Purpose

This study aims to show how universities may engage in social responsibility approaches and to understand in depth how the university social responsibility (USR) practices contribute in achieving sustainable development.

Design/methodology/approach

Exploratory qualitative research was directed based on two Tunisian Universities (two case studies); the first one belongs to the public sector and the second one to the private sector. Data were collected through participant observations, group interviews, documentation as well as semistructured interviews with students and administrative staff. The survey was carried out in 2022, immediately following the COVID-19 health crisis. The interview lasted 45-min on average.

Findings

The results confirmed that USR was applicable within the two studied institutions. The two cases under investigation primarily concerned academic and philanthropic responsibilities, with practices pertaining to ethical and legal responsibilities being observed, albeit not to the same extent as the other two responsibilities. Therefore, universities prioritize the welfare of people over anything else when they implement a USR policy.

Originality/value

The USR is an approach that many higher education institutions, both public and private, must appropriate. Nevertheless, this field is still virgin in academic research and this theme remains unexplored within the Tunisian territory. Thus, through the present study, the authors were able to understand in depth the USR practices and confirmed that these two institutes were socially responsible. Consequently, the authors are inviting other Tunisian Universities to adhere to these approaches regarding their benefits among society, environment and economy.
Actions speak louder than words: Can credible green commitment facilitate bank loan financing? Evidence from China
Authors: Sun Yuan , Yu Lisheng
Published: February 2024

Our study investigates whether credible commitment to corporate green behaviours influences corporate finance. Specifically, using the unique setting Green Manufacturing (GM) program in China, we examine whether and how green manufacturing certification (GMC) endorsed by the government could lead to an increase in firms' bank loan financing. We find that GMC increases bank loan financing, mainly through alleviation of banks' concerns of information risk and default risk potentially arising from environmental risk. Heterogeneity analyses show that the positive effect of GMC on bank loan financing is more pronounced for non‐state‐owned enterprises, firms in polluting industries, in less eco‐friendly regions, and in Green Finance Pilot Program regions. Our findings suggest that the government plays an important role in discerning and endorsing corporate green behaviours, and thus directing banks' financial resource allocation decisions.
Comparison of two methods of sperm‐ and testis‐mediated gene transfer in production of transgenic animals: A systematic review
Authors: Dehghan Zeinab , Darya Gholamhossein , Mehdinejadiani Shayesteh , Derakhshanfar Amin
Published: February 2024

Transgenic (Tg) animal technology is one of the growing areas in biology. Various Tg technologies, each with its own advantages and disadvantages, are available for generating Tg animals. These include zygote microinjection, electroporation, viral infection, embryonic stem cell or spermatogonial stem cell‐mediated production of Tg animals, sperm‐mediated gene transfer (SMGT), and testis‐mediated gene transfer (TMGT). However, there are currently no comprehensive studies comparing SMGT and TMGT methods, selecting appropriate gene delivery carriers (such as nanoparticles and liposomes), and determining the optimal route for gene delivery (SMGT and TMGT) for producing Tg animal. Here we aim to provide a comprehensive assessment comparing SMGT and TMGT methods, and to introduce the best carriers and gene transfer methods to sperm and testis to generate Tg animals in different species. From 2010 to 2022, 47 studies on SMGT and 25 studies on TMGT have been conducted. Mice and rats were the most commonly used species in SMGT and TMGT. Regarding the SMGT approach, nanoparticles, streptolysin‐O, and virus packaging were found to be the best gene transfer methods for generating Tg mice. In the TMGT method, the best gene transfer methods for generating Tg mice and rats were virus packaging, dimethyl sulfoxide, electroporation, and liposome. Our study has shown that the efficiency of producing Tg animals varies depending on the species, gene carrier, and method of gene transfer.
Bilateral Peters' anomaly, aniridia and Wilms tumour (WAGR syndrome) in monozygotic twins
Authors: Cronemberger Sebastião , Albuquerque Anna L. B. , Silva Ana Cristina Simões e , Zanini Jovita Lane Soares Santos , da Silva Alexandre Higino Gonçalves , Barbosa Luciana F. , da Cunha Rubião Francine , de Lima Felipe L. , Casimiro Rossana Fonseca , Martins Márcio Placedino , Diniz‐Filho Alberto , Bastos‐Rodrigues Luciana , Friedman Eitan , De Marco Luiz
Published: February 2024

Aim

This study reports the bilateral association of Peters' anomaly and congenital aniridia in monozygotic twins subsequently diagnosed with Wilms tumour (WAGR syndrome).

Methods

Two monozygotic female twins were referred at age 2 months with bilateral corneal opacity. A diagnosis of Peters' anomaly associated to aniridia was made in both eyes of both twins. Physical examination and ultrasonography were carried out at 12 months of age to explore the possibility of WAGR‐related anomalies, specifically Wilms tumour. DNA were isolated and subjected to whole exome sequencing.

Results

Peters' anomaly associated to aniridia in both eyes as well as bilateral Wilms tumour in both children were diagnosed. Exome analyses showed a large heterozygous deletion encompassing 6 648 473 bp in chromosome 11p13, using Integrative Genomics Viewer and AnnotSV software.

Conclusion

WAGR syndrome is a rare contiguous gene deletion syndrome with a greater risk of developing Wilms tumour associated with Peters' anomaly and congenital aniridia. However, co‐occurrence of both anomalies was rarely reported in twins, and never in both eyes of monozygotic twins. Here, we report the bilateral association of Peters' anomaly and congenital aniridia in monozygotic twins with WAGR syndrome.
Prefabricated shouldered abutments enable successful restoration of molar crowns on implants
Authors: Cheng Yu‐Chi , Perpetuini Paolo , Marincola Mauro , Speratti Drauseo , Murcko Laura , Hirayama Muneki , Benalcázar‐Jalkh Ernesto B. , Bonfante Estevam A.
Published: February 2024

Purpose

This retrospective study evaluated the effect of selected clinical and patient factors on survival, success, and peri‐implant bone level changes of locking taper implants supporting molar crowns on Bicon's prefabricated shouldered abutments.

Methods

A total of 234 patients, who received 274 single molar crowns supported by locking taper implants were included in this retrospective study. Kaplan–Meier survival analysis was used to assess overall implant survival, prostheses survival, and success. Crowns were either monolithic (resin based) or bilayered (milled fiber‐reinforced composite coping veneered with indirect composite). Early and late changes in marginal bone levels were plotted and analyzed with equivalence testing to compare the effects of different factors on crestal bone levels.

Results

At 9.5 years after implant surgery, the implant survival probability was 94.2%, the probability of prosthesis survival was 91.4%, and the probability of prosthetic success was 90.4%. Neither the use of different crown materials, nor the choice of monolithic versus bilayered crown construction, significantly affected the probability of prosthetic success. Marginal bone levels, on average, trended downwards towards the top of the implant within the first 2 years after functional loading, and remained stable on average, since then. Factors affecting bone levels included the use of nonsteroidal anti‐inflammatory drugs, which precluded early implant bone loss; and subcrestal implant placement, which was linked to significantly higher long‐term bone levels.

Conclusion

The implant and abutment system studied resulted in high implant and prosthetic survival rates, regardless of prosthetic material used, with stable bone levels over time.
S3‐Leitlinie Atopische Dermatitis: Teil 2 ‐ Systemische Therapie
Authors: Werfel Thomas , Heratizadeh Annice , Aberer Werner , Augustin Matthias , Biedermann Tilo , Bauer Andrea , Fölster‐Holst Regina , Kahle Julia , Kinberger Maria , Nemat Katja , Neustädter Irena , Peters Eva , von Kiedrowski Ralph , Schmid‐Grendelmeier Peter , Schmitt Jochen , Schwennesen Thomas , Simon Dagmar , Spindler Thomas , Traidl‐Hoffmann Claudia , Werner Ricardo Niklas , Wollenberg Andreas , Worm Margitta , Ott Hagen
Published: February 2024

Die vorliegende S3‐Leitlinie wurde auf der Basis der europäischen englischsprachigen S3‐Leitlinie unter besonderer Berücksichtigung der medizinischen Gegebenheiten im deutschsprachigen Raum und mit Ergänzungen der deutschsprachigen Vorgängerversion, entsprechend den Kriterien der AWMF, erstellt. Dieser zweite Teil der Leitlinie behandelt die systemische Therapie der atopischen Dermatitis (AD). Eingegangen wird unter anderem auf die Indikationsstellung für eine Systemtherapie bei Kindern, Jugendlichen und erwachsenen Patienten mit AD. Darüber hinaus werden alle für die AD zugelassenen Medikamente wie die Biologika Dupilumab und Tralokinumab, die Januskinase‐Inhibitoren Abrocitinib, Baricitinib und Upadacitinib sowie die konventionellen immunsuppressiven Therapien mit systemischen Glukokortikosteroiden und Ciclosporin adressiert. Systemische Off‐Label‐Therapien werden ebenfalls behandelt. Der separat publizierte erste Teil der Leitlinie umfasst die Definition und diagnostischen Aspekte der AD, beschreibt die topische Therapie sowie nichtmedikamentöse Therapieverfahren und geht auf Aspekte bei besonderen Patientengruppen ein.
Tumeszenz‐Lokalanästhesie bei geriatrischen Patienten mit Hauttumoren im Kopf‐Hals‐Bereich – Eine retrospektive Studie an 782 Patienten
Authors: Schnabl Saskia Maria , Garbe Claus , Breuninger Helmut , Walter Vincent , Aebischer Valentin , Huynh Julia , Ghoreschi Franziska Carola , Häfner Hans‐Martin , Scheu Alexander
Published: February 2024

Hintergrund und Zielsetzung

Aufgrund ihrer Morbidität werden dermatochirurgische Eingriffe bei älteren Patienten vorzugsweise in Tumeszenz‐Lokalanästhesie durchgeführt. Allerdings ist die Datenlage hierzu begrenzt. Ziel der Arbeit war es, die Tumeszenz‐Lokalanästhesie für Hautkrebsoperationen bei älteren Patienten mit dem Fokus auf klinische Vorteile (Behandlungsprozesse, Schmerzmanagement) und dem lokalen postoperativen Komplikationsrisiko zu evaluieren.

Patienten und Methodik

Untersuchung von Patienten ≥75 Jahren mit stationär durchgeführten Hautkrebsoperationen im Kopf‐Hals‐Bereich unter Tumeszenz‐Lokalanästhesie.

Ergebnisse

2940 Eingriffe bei 782 Patienten (Durchschnittsalter 83,3 Jahre) mit dem Ziel einer vollständigen Tumorresektion während des stationären Aufenthaltes wurden durchgeführt. 3,8 (Bereich: 1–20) Eingriffe erfolgten über einen Zeitraum von durchschnittlich 4,9 Tagen (Bereich: 1–28). 43,2% benötigten keine postoperative Analgesie. 53,5% erhielten NSAID, 3,3% Opioide. Wundinfektionen (13,6%) waren die häufigste lokale postoperative Komplikation. Chirurgische Interventionen aufgrund von Nachblutungen waren in 2,8% der Fälle erforderlich. Keine der Blutungen waren hämoglobinrelevant oder lebensbedrohlich. Nahtdehiszenzen und Nekrosen waren selten (0,6%).

Schlussfolgerungen

Die Tumeszenz‐Lokalanästhesie ist für Hautkrebsoperationen bei älteren Menschen eine effektive Anästhesiemethode. Durch den Verzicht auf eine Vollnarkose können die Behandlungsabläufe optimiert und anästhesiologische Risiken minimiert werden. Lokale postoperative Komplikationen treten eher selten auf und sind gut behandelbar. Die langanhaltende Analgesie führt zu einem geringeren Analgetikabedarf und selteneren Medikamenteninteraktionen.
Therapie der okulären Rosazea: Eine systematische Literatur‐Übersicht
Authors: Avraham Shani , Khaslavsky Sophie , Kashetsky Nadia , Starkey Samantha Y. , Zaslavsky Kirill , Lam Joseph M. , Mukovozov Ilya
Published: February 2024

Die Rosazea ist eine häufige chronische Hauterkrankung, die sich hauptsächlich im mittleren Bereich des Gesichtes manifestiert. Die okulären Manifestationen der Rosazea wurden bisher nur unzureichend untersucht und bereits die Schätzungen der Prävalenz schwanken erheblich zwischen 6% und 72% der Gesamtpopulation aller Rosazea‐Patienten. Zu den Behandlungsmöglichkeiten der okuläre Rosazea gehören die Lidhygiene, topisch anwendbare antimikrobielle Substanzen, topisch oder oral verabreichte Antibiotika und Vitamin‐A‐Derivate, Cisclosporin‐haltige Emulsionen speziell für das Auge und IPL‐Behandlungen (intense pulsed light). Direkte Vergleiche zwischen den verschiedenen Therapieoptionen fehlen jedoch. Ziel dieser Literatur‐Übersicht ist es, die Wirksamkeit und Nebenwirkungen der verschiedenen Behandlungsmöglichkeiten der okulären Rosazea zu vergleichen. Dazu wurden systematische Datenbankrecherchen in Cochrane, MEDLINE und Embase durchgeführt. Titel, Abstrakt, Volltext und Daten wurden jeweils doppelt durchgesehen. Insgesamt erfüllten 66 Artikel mit einer kumulierten Patientenzahl von 1275 Patienten die Einschlusskriterien. Zu den wirksamsten Behandlungsoptionen zählten topisch anwendbare antimikrobielle Substanzen und die orale Gabe von Antibiotika. Damit konnte bei 91% (n  =  82/90) bzw. 89% (n  =  525/580) der Patienten ein vollständiges oder partielles Ansprechen erzielt werden. Es folgten die IPL‐Behandlung (89%, n  =  97/109 partielles Ansprechen), die Ciclosporin‐Augen‐Emulsion (87% n  =  40/46) und die Lidhygiene (65%, n  =  67/105). Kombinationsbehandlungen führten in 90% der Fälle (n  =  69/77) zu einem vollständigen bzw. partiellen Ansprechen. Diese Ergebnisse deuten darauf hin, dass eine topische Therapie mit antimikrobiellen Substanzen, Antibiotika per os, IPL und Ciclosporin‐haltige Emulsionen die effektivsten Einzelmaßnahmen zur Behandlung der okulären Rosazea darstellen.
Increasing planting density increases fruit mass and reduces the dispersal ability of a range‐expanding invasive plant, Mikania micrantha
Authors: Huang Fangfang , Wang Ya , Zhu Bin , Huang Qiaoqiao
Published: February 2024

Aim

Invasive plants may evolve a suite of distinctive traits during spread in the new range. Among these traits, dispersal ability is an important trait determining the invasion speed of exotic plants. There is evidence that higher dispersal ability is favoured at the invasion front, where population density may be low. However, no study has explicitly tested how planting density in a common garden affects the dispersal ability of invasive plants.

Location

Hainan island of China.

Methods

In this study, using 27 populations of an invasive plant, Mikania micrantha, which is expanding its range on Hainan island of China, we examine how three dispersal‐related traits (i.e. dispersal ability, fruit mass, and pappus radius) change with distance from invasion centre and field population density, and how planting density in a common garden affects dispersal traits.

Results

Dispersal traits did not change with distance from the invasion centre and field population cover either in the natural environment or in the common garden. In the common garden, increasing planting density from one to five plants per pot increased fruit mass and decreased dispersal ability, indicating that the effect of density on dispersal traits could not be detected in the field. The relationship between dispersal ability in the natural environment and that in the common garden was positive but significant only under the five plants per pot treatment, possibly because dispersal traits in natural conditions were selected under high‐density growth conditions.

Main Conclusions

Our results indicate that increasing population density may increase fruit mass and reduce the dispersal ability of range‐expanding invasive plants. We suggest that further studies exploring the patterns of dispersal traits in range‐expanding invasive plants in a common garden should consider intraspecific competition.
The International Association of Dental Traumatology (IADT) and the Academy for Sports Dentistry (ASD) guidelines for prevention of traumatic dental injuries: Part 4: Faceshields for the prevention of dental and oral trauma
Authors: Abbott Paul V. , Tewari Nitesh , Mills Stephen C. , Stasiuk Hans , Roettger Mark , O'Connell Anne C. , Levin Liran
Published: February 2024

The Guidelines for Prevention of Traumatic Dental Injuries were reviewed and approved by the Board of Directors of the International Association of Dental Traumatology (IADT) and the Academy for Sports Dentistry (ASD).
The International Association of Dental Traumatology (IADT) and the Academy for Sports Dentistry (ASD) guidelines for prevention of traumatic dental injuries: Part 8: ToothSOS app
Authors: Tewari Nitesh , Abbott Paul V. , O'Connell Anne C. , Mills Stephen C. , Stasiuk Hans , Roettger Mark , Levin Liran
Published: February 2024

The Guidelines for Prevention of Traumatic Dental Injuries were reviewed and approved by the Board of Directors of the International Association of Dental Traumatology (IADT) and the Academy for Sports Dentistry (ASD).
Can social enterprises achieve resilience and at what price?
Authors: Zhu Edwina Y.
Published: February 2024

Social enterprises (SEs) are claimed to be able to address “wicked social problems1” in various policy instruments and governance models. However, doubts have been raised about whether the hybrid nature results in fundamental challenges that could prevent SEs from becoming ideal and sustainable public service organizations. Drawing upon organizational resilience literature, this article reveals two trade‐offs between social and business service qualities when SEs seek long‐term solutions to the challenges in delivering public services. This article argues that SEs—employing different hybrid models, emphasizing social or business service quality—jointly can overcome the trade‐offs to deliver sustainable and accountable public services at the public service contract level and the individual user's level.
Fusion–fission–mitophagy cycling and metabolic reprogramming coordinate nerve growth factor (NGF)‐dependent neuronal differentiation
Authors: Goglia Ilaria , Węglarz‐Tomczak Ewelina , Gioia Claudio , Liu Yanhua , Virtuoso Assunta , Bonanomi Marcella , Gaglio Daniela , Salmistraro Noemi , De Luca Ciro , Papa Michele , Alberghina Lilia , Westerhoff Hans V. , Colangelo Anna Maria
Published: February 2024

Neuronal differentiation is regulated by nerve growth factor (NGF) and other neurotrophins. We explored the impact of NGF on mitochondrial dynamics and metabolism through time‐lapse imaging, metabolomics profiling, and computer modeling studies. We show that NGF may direct differentiation by stimulating fission, thereby causing selective mitochondrial network fragmentation and mitophagy, ultimately leading to increased mitochondrial quality and respiration. Then, we reconstructed the dynamic fusion–fission–mitophagy cycling of mitochondria in a computer model, integrating these processes into a single network mechanism. Both the computational model and the simulations are able to reproduce the proposed mechanism in terms of mitochondrial dynamics, levels of reactive oxygen species (ROS), mitophagy, and mitochondrial quality, thus providing a computational tool for the interpretation of the experimental data and for future studies aiming to detail further the action of NGF on mitochondrial processes. We also show that changes in these mitochondrial processes are intertwined with a metabolic function of NGF in differentiation: NGF directs a profound metabolic rearrangement involving glycolysis, TCA cycle, and the pentose phosphate pathway, altering the redox balance. This metabolic rewiring may ensure: (a) supply of both energy and building blocks for the anabolic processes needed for morphological reorganization, as well as (b) redox homeostasis.
Foliar N2O emissions constitute a significant source to atmosphere
Authors: Qin Shuping , Pang Yaxing , Hu Huixian , Liu Ting , Yuan Dan , Clough Timothy , Wrage‐Mönnig Nicole , Luo Jiafa , Zhou Shungui , Ma Lin , Hu Chunsheng , Oenema Oene
Published: February 2024

Nitrous oxide (N2O) is a potent greenhouse gas and causes stratospheric ozone depletion. While the emissions of N2O from soil are widely recognized, recent research has shown that terrestrial plants may also emit N2O from their leaves under controlled laboratory conditions. However, it is unclear whether foliar N2O emissions are universal across varying plant taxa, what the global significance of foliar N2O emissions is, and how the foliage produces N2O in situ. Here we investigated the abilities of 25 common plant taxa, including trees, shrubs and herbs, to emit N2O under in situ conditions. Using 15N isotopic labeling, we demonstrated that the foliage‐emitted N2O was predominantly derived from nitrate. Moreover, by selectively injecting biocide in conjunction with the isolating and back‐inoculating of endophytes, we demonstrated that the foliar N2O emissions were driven by endophytic bacteria. The seasonal N2O emission rates ranged from 3.2 to 9.2 ng N2O–N g−1 dried foliage h−1. Extrapolating these emission rates to global foliar biomass and plant N uptake, we estimated global foliar N2O emission to be 1.21 and 1.01 Tg N2O–N year−1, respectively. These estimates account for 6%–7% of the current global annual N2O emission of 17 Tg N2O–N year−1, indicating that in situ foliar N2O emission is a universal process for terrestrial plants and contributes significantly to the global N2O inventory. This finding highlights the importance of measuring foliar N2O emissions in future studies to enable the accurate assigning of mechanisms and the development of effective mitigation.
Efficacy and safety of platelet‐rich plasma in the treatment of venous ulcers: A systematic review and meta‐analysis of randomized controlled trials
Authors: Hu Zhonglin , Wang Senmao , Yang Hao , Xv Haona , Shan Baozhen , Lin Lin , Han Xuefeng
Published: February 2024

Considering the substantial impact of venous ulcers on quality of life and healthcare systems, this study evaluated the efficacy and safety of platelet‐rich plasma (PRP) in comparison to conventional therapy. A systematic review of four databases identified 16 randomized clinical trials, including 20 study groups. PRP significantly enhanced complete ulcer healing, exhibiting an odds ratio (OR) of 5.06 (95% confidence interval [CI]: 2.35–10.89), and increased the percentage of healed ulcer area by a mean difference of 47% (95% CI: 32%–62%). Additionally, PRP shortened the time required for complete healing by an average of 3.25 months (95% CI: −4.06 to −2.43). Although pain reduction was similar in both groups, PRP considerably decreased ulcer recurrence rates (OR = 0.16, 95% CI: 0.05–0.50) without increasing the risks of infection or irritative dermatitis. These results suggest PRP as a viable, safe alternative for venous ulcer treatment, providing significant improvements in healing outcomes.