bluuebunny/crossref_metadata_2025_split huggingface dataset:
An intermolecular Lewis pair based on tin acid and phosphonium ylide base functions
Authors: Meyer Peter , Neumann Beate , Stammler Hans-Georg , Mitzel Norbert W. 
Published: January 2025

Abstract
The tin-containing Lewis acid group (C2F5)3Sn was combined with a phosphonium ylide as base function in one molecule: o-[(C2F5)3Sn]-C6H4(Ph)2PCMe2. It was prepared by reacting the ortho-lithiated triphenylphosphoniumdimethylmethylide (o-Li-C6H4)(Ph)2PCMe2 with the stannyl chloride (C2F5)3SnCl to afford o-[(C2F5)3Sn]-C6H4(Ph)2PCMe2 in 86 % yield. It forms a ring structure with a bond between tin and the ylidic carbon atom both in solution and in the solid state and can thus be considered as a hidden frustrated Lewis pair. The title compound is unreactive towards H2, CO2, CS2, PhNCO and decomposes in the presence of SO2 or NH3. However, it is active in the catalytic reduction of CO2 with pinacolborane, H–BPin. The title compound reacts slowly with H–BPin in an unselective reaction from which a reduction product with cleaved C2F5 group, the phosphonium stannate (II) o-[(C2F5)2Sn]-C6H4(Ph)2PCHMe2, could be obtained in small amounts.
Cyanopyridine adducts of SiF4 and SiCl4
Authors: Riedel Sophie , Brendler Erica , Gericke Robert , Kroke Edwin , Wagler Jörg 
Published: January 2025

Abstract
The formation of cyanopyridine (CN-py) adducts of silicon tetrahalides was investigated for 3- and 4-cyanopyridine in combination with SiF4 and SiCl4. Whereas bubbling of SiF4 through toluene solutions of 3-CN-py and 4-CN-py afforded white precipitates, which should possess the respective composition SiF4(CN-py)2, addition of SiCl4 did not cause any precipitation. Upon storage of the toluene solution of SiCl4 and 4-CN-py at 6 °C for several weeks, some crystals of the composition SiCl4(4-CN-py)2 ⋅ 2 (4-CN-py) ⋅ (toluene) were obtained. The use of SiCl4 as the solvent (i.e. SiCl4 in large excess) and dissolving 4-CN-py therein gave access to a crystalline adduct of the composition SiCl4(4-CN-py)2 ⋅ 2 (4-CN-py). 3-CN-py instead recrystallized from SiCl4 without forming an adduct with the silane. Computational analyses (B2T-PLYP level) of the single-point energy differences between starting materials SiX
4 (X = F, Cl) and ‘pyridine’ (‘pyridine’ = pyridine, 3-CN-py, 4-CN-py) and their adducts SiX
4(‘pyridine’)2 revealed the tendencies toward adduct formation to decrease in the order SiF4 > SiCl4 as well as pyridine >> 4-CN-py > 3-CN-py. For SiCl4 with 4- and 3-CN-py, the energy of adduct formation (−7.0 and −5.7 kcal mol−1, respectively) is easily compensated by entropy effects at room temperature. Whereas the former explains as to why cyanopyridines and SiCl4 may co-exist without noticeable adduct formation, the crystal structures of the adducts SiCl4(4-CN-py)2 ⋅ 2 (4-CN-py) ⋅ (toluene) and SiCl4(4-CN-py)2 ⋅ 2 (4-CN-py) reveal the additional stabilization of these solids by co-crystallization with 4-cyanopyridine, which eventually enabled the isolation of the SiCl4(4-CN-py)2 moiety in a solid. Partial decomposition (hydrolysis) during attempts of recrystallization of SiF4(4-CN-py)2 and SiF4(3-CN-py)2 afforded crystals of the ionic compounds [4-CN-PyH]+[SiF5(4-CN-py)]– and [3-CN-PyH]+
2[SiF6]2–, respectively.
A [Zn4O(fcCO2)6] oxocarboxylate cluster: synthesis, chemical and physical properties
Authors: Hirschfeld Marius , Rüffer Tobias , Lang Heinrich 
Published: January 2025

Abstract
The reaction of the ferrocene derivative Fe(ƞ
5-C5H4CO2H)(ƞ
5-C5H4CH=CH2) (=fcCO2H) (1) with the zinc reagents [Zn(OAc)2]·xH2O (OAc = acetate; 2a, x = 0; 2b, x = 2) or ZnEt2 (3) in non-aqueous solvents toluene or tetrahydrofuran resulted in the formation of the cluster [Zn4O(fcCO2)6] (4). The structure of 4 in the solid state has been determined by single-crystal X-ray diffraction analysis. Cluster 4 crystallizes in the triclinic space group P

1
‾

$\overline{1}$

. In 4, the cluster core is set-up by four zinc(II) ions which are forming the vertices of a tetrahedron with a μ
4-oxygen atom in its center. Six μ-fcCO2 units bridge the edges of the tetrahedron. IR spectroscopy confirms with ∆ν
CO2 = 91 cm−1 (∆ν
CO2 = ν
CO2,asym − ν
CO2,sym) the μ-bridging character of the fcCO2 entities. Cyclic voltammetry studies showed a reversible redox event at E°′ = 245 mV versus FcH/FcH+ (FcH = Fe(ƞ
5-C5H5)2) for 4 with the six fcCO2 redox events superimposed. High-resolution ESI-TOF measurements verified the identity of 4.
Effect of Loading and Carbonation on the Compressive Strength and Hydraulic Conductivity of Solidified Sand
Authors: Aburaas Ghassan , Duhaime François , Dubé Jean-Sébastien 
Published: January 2025

Abstract
Cement-based solidification/stabilization (S/S) techniques have been widely used to produce stable forms of contaminated soils and reduce the mobility of contaminants into the environment. However, information on the long-term performances of S/S under environmental conditions (i.e., variable loading and atmospheric carbon dioxide) remains sparse. In this study, a triaxial test setup was modified to simulate environmental conditions. The permeability and compressive strength of silica sand solidified with portland cement were measured at different stages of four scenarios involving carbonation only, axial strain only, carbonation followed by axial strain, and axial strain followed by carbonation. X-ray computed tomography (CT) was used to characterize the internal structure of the samples. Permeability and compressive strength results indicate that the axial strain accelerated the damage to the S/S specimens and increased their permeability. The deterioration due to the mechanical strain decreased in the presence of carbon dioxide. Consistent changes in microstructure were observed with the CT scan. The results indicate that the influence of stressors on the void size distribution, compressive strength, and permeability is complex and characterized by interactions between the stressors.
Enhancing Online Job Shop Scheduling Efficiency: Simulation-Based Optimization Incorporating Human Productivity Factors and TOPSIS Ranking
Authors: Ahmadi Parham 
Published: January 2025

Abstract
The job shop scheduling problem is a classical optimization challenge aimed at determining the optimal processing order by assigning a set of resources to a corresponding set of operations. This article investigates various approaches to address the online job shop scheduling problem, employing a simulation-based study. Dispatching rules are applied to allocate resources to operations, with discrete event simulation used for problem assessment. The study also incorporates human productivity factors, specifically investigating the shortest processing time (SPT) dispatching rule in a separate scenario. Five distinct scenarios are simulated, including four dispatching rules (first in, first out; last in, first out; longest processing time; and SPT) and an additional scenario integrating the SPT rule and human productivity factors. The simulation results are used to compare makespan across these scenarios, revealing that the scenario involving the SPT dispatching rule and human productivity factors represents the shortest makespan. Through a TOPSIS technique-based ranking, considering makespan and cost as criteria, the study identifies the SPT rule and human productivity factors as the most efficient scenario. The findings imply that employing human productivity factors with effective dispatching rules, such as SPT, can significantly improve job shop scheduling operational efficiency and lead to more optimal results in both makespan and overall operational costs.
Le projet LIAM : effets d’un programme de lecture interactive sur la fluidité en lecture et le vocabulaire d’élèves du 1er cycle du primaire avec et sans difficulté langagière durant la période estivale
Authors: Chapleau Nathalie , Godin Marie-Pier 
Published: January 2025

Durant la période estivale, l’arrêt d’un enseignement peut entrainer un recul des apprentissages. Cette étude vise à examiner les effets d’activités de lecture interactive et de littératie sur le maintien des apprentissages en lecture de mots et de textes (fluidité) ainsi que sur le vocabulaire durant l’été. Les activités se sont réalisées auprès d’élèves du 1er cycle du primaire selon trois contextes distincts : en milieu familial (n = 26), à la bibliothèque municipale (n = 9) ou au camp de jour (n = 7). Les résultats obtenus révèlent que les participantes et participants ont maintenu leurs apprentissages durant l’été.
From biological marker to clinical application: the role of anti-Müllerian hormone for delayed puberty and idiopathic non-obstructive azoospermia in males
Authors: Zeng Yuanyuan , Zhao Guicheng , Zheng Yi , Jiang Xiaohui 
Published: January 2025

Graphical abstract

Role of anti-Müllerian hormone (AMH) in male development and fertility prediction. (A) AMH levels in normal development, constitutional delay of growth and puberty (CDGP) and central hypogonadotropic hypogonadism (CHH) models. In normal males, AMH declines with puberty; in CDGP and CHH, AMH is normal or slightly elevated or abnormally low, indicating delayed or impaired pubertal progression. (B) AMH as a predictor of successful sperm retrieval (SSR) in idiopathic non-obstructive azoospermia. Lower AMH levels (<2.6 ng/mL) correlate with higher SSR in microdissection testicular sperm extraction.

Abstract
Anti-Müllerian hormone (AMH), a biomarker secreted by Sertoli cells in the testes, has emerged as a critical indicator of male reproductive function with significant clinical application potential. AMH reflects Sertoli cell activity and plays a pivotal role across different stages of male gonadal function. First, in prepubertal males, AMH levels are crucial for assessing testicular development and the progression of puberty, with delayed or insufficient AMH secretion often being associated with disorders such as delayed puberty. Second, in reproductive-age males, AMH serves as an important biomarker for evaluating spermatogenic capacity, particularly in cases of idiopathic non-obstructive azoospermia. In these patients, AMH levels can help predict the success of testicular sperm extraction, thereby influencing fertility treatment strategies. This review explores the physiological mechanisms of AMH and its diagnostic and prognostic significance in both delayed puberty and fertility disorders in reproductive-age males. While AMH shows great promise in the management of hypogonadism, further research is needed to validate its clinical utility and refine treatment protocols for optimizing patient outcomes.
Aktivitas Antibakteri Sediaan Masker Gel Peel Off Ekstrak Mentimun (Cucumis Sativus) Dan Tomat (Solanum Lycopersicum) Terhadap Staphylococcus Epidermidis
Authors: Rahasasti Indri Dwi , Luviriani Eva , Calyptranti Rosellynia , Kurniawati Triani , Rahayu Lia Handayani 
Published: January 2025

Acne is a disease that can be caused by bacteria, one of which is Staphylococcus epidermidis. Acne can be treated with active compounds derived from natural ingredients such as cucumbers and tomatoes. Gel masks peel off. This study aims to determine the average diameter of the inhibition zone, the difference in the average diameter of the inhibition zone, and the antibacterial activity of the peel-off from a mixture of cucumber (Cucumis sativus) and tomato (Solanum lycopersicum) with a concentration of 5%, 10 %, 15%, 20% against Staphylococcus epidermidis. This experimental study uses a Completely Randomized Design (CRD) consisting of one factor and 6 levels. The results showed that the average diameter of the inhibition zone of the anti-acne peel-off gel mask preparation of cucumber and tomato extracts against Staphylococcus epidermidis at a concentration of 5%, 10%, 15% and 20% were 16.38 mm, respectively. ; 24.88 mm; 29.88 mm and 34.88 mm. There was a significant difference in the average diameter of the inhibition zone of the peel off mixture of cucumber and tomato extracts with a concentration of 5%, 10%, 15%, and 20%; against Staphylococcus epidermidis. gel mask preparation peels off from a mixture of cucumber and tomato extracts against Staphylococcus epidermidis at a concentration of 5%, 10% concentration, 15% concentration and 20% concentration, namely strong, very strong, very strong and very strong.
Aktivitas Antijamur Ekstrak Biji Kopi Hijau Robusta (Coffea canephora) Terhadap Candida albicans.
Authors: Situmorang Ing Mayfa Br , Salsadila Putri , Maulidayanti Sharfina , Tanjung Asbar 
Published: January 2025

Acne is a disease that can be caused by bacteria, one of which is Staphylococcus epidermidis. Acne can be treated with active compounds derived from natural ingredients such as cucumbers and tomatoes. Gel masks peel off. This study aims to determine the average diameter of the inhibition zone, the difference in the average diameter of the inhibition zone, and the antibacterial activity of the peel-off from a mixture of cucumber (Cucumis sativus) and tomato (Solanum lycopersicum) with a concentration of 5%, 10 %, 15%, 20% against Staphylococcus epidermidis. This experimental study uses a Completely Randomized Design (CRD) consisting of one factor and 6 levels. The results showed that the average diameter of the inhibition zone of the anti-acne peel-off gel mask preparation of cucumber and tomato extracts against Staphylococcus epidermidis at a concentration of 5%, 10%, 15% and 20% were 16.38 mm, respectively. ; 24.88 mm; 29.88 mm and 34.88 mm. There was a significant difference in the average diameter of the inhibition zone of the peel off mixture of cucumber and tomato extracts with a concentration of 5%, 10%, 15%, and 20%; against Staphylococcus epidermidis. gel mask preparation peels off from a mixture of cucumber and tomato extracts against Staphylococcus epidermidis at a concentration of 5%, 10% concentration, 15% concentration and 20% concentration, namely strong, very strong, very strong and very strong. Keywords: staphylococcus epidermidis, gel mask peel-off, cucumber, tomato
Enhancing Educational Efficiency Through Viable System Modelling: A Case Study of University Accounting Department
Authors: Ramsarghey Kevin , Ramsarghey Anchal , Msosa Steven Kayambazinthu 
Published: January 2025

Purpose: The aim of this study was to assess how educational efficiency could be enhanced using a viable system modelling approach applied to a university accounting department.

Methodology: This study used the recursive nature of VSM to highlight how various levels of the organization can simultaneously work in alignment. The triple recursion levels were applied to the university, the accounting department, and the accounting lecturers.

Findings: The findings show that themes that defined well-rounded accounting education professionals were work experience, teaching experience and the teaching qualification. The system in focus was identified as the accounting lecturers, as this is where the improvement and efficiency in teaching and learning occurs.

Theoretical implications: The findings suggest that, if VSM is used to its full potential, it can solve complex problems to create a viable working system. Thus, universities are complex institutions that require traditional solutions in combination with the strengths of the VSM offering. However, it must be noted that an acceptance and familiarity of VSM must be created for it to be accepted as a working solution to problems.

Research Limitation/Future research: This study focused on the application of VSM to a specific department within a higher education institution such that the findings cannot be applied wholesale. Therefore, future research should consider all departments within a higher education institution.

JEL Classification Codes: I23, M41
A redação do Enem como expressão de capital cultural: renda, tipo de escola e raça em análise
Authors: Jensen Santana Izabel , S. R. Dantas Adriana 
Published: January 2025

Este estudo analisa o perfil socioeconômico de estudantes com nota zero e nota mil na redação do Enem extraídos dos microdados do Inep entre os anos de 2009 até 2018. Em abordagem bourdieusiana, os resultados demonstram que os candidatos com nota mil vêm de famílias com renda mais alta, frequentam escolas privadas e são majoritariamente brancos, enquanto os com nota zero são de famílias com renda mais baixa, frequentam escolas públicas e são, em sua maioria, pardos. A redação do Enem é mais um dado empírico que demonstra a persistência de desigualdades, ressaltando a necessidade de políticas que visem reduzir as disparidades educacionais e promover a igualdade de oportunidades para diferentes camadas.
Implementation and evaluation of a novel community-based urban mobile health clinic in Toronto, Ontario
Authors: O’Neill Meghan , Redelmeier Robert J. , Michalski Camilla , Macaraeg Raymond , Gans Maureen , Schoffel Alice , Diemert Lori M. , Ogbaselassie Luwam , Rosella Laura C. , Boozary Andrew 
Published: January 2025

Abstract

Setting
Despite Canada’s single-payer health system, marginalized populations often experience poor health outcomes and barriers to healthcare access. In response, mobile health clinics (MHCs) have been deployed in several cities across Canada. MHCs are well established in the United States; however, little is known about their role and impact in a country with universal healthcare. We describe the implementation of an urban MHC and early learnings from a mixed methods process and outcome-oriented evaluation.

Intervention
In February 2021, Parkdale Queen West Community Health Centre, TELUS Health for Good, and University Health Network’s Gattuso Centre for Social Medicine partnered to launch a nurse practitioner‒led, community-based MHC in Toronto, Ontario. The MHC provides low-barrier primary healthcare, harm reduction, and mental health services at five convenient locations.

Outcomes
Through an intercept survey (n = 49) and semi-structured interviews (n = 10), we sought to understand the sociodemographic characteristics of clients, their experiences at the MHC, and barriers and facilitators to the MHC in comparison to traditional healthcare settings. Most clients surveyed reported being homeless (61%). Without the MHC, 37% of clients would have accessed care at an emergency department and 18% would not have sought care. Thematic analysis revealed two structural and two relational factors that improved care experiences and care access.

Implications
We demonstrate that in a single-payer health system, MHCs alleviate major barriers to care access for marginalized populations. Learnings provide context to the most salient factors influencing clients’ decisions to seek care at MHCs and can inform how these outreach models are designed.
Intervención educativa sobre soporte vital básico en pré-escolar
Authors: Pinzón Ramírez Maria Fernanda , Alfonso Burgos Laura Fernanda , Saenz Montoya Ximena 
Published: January 2025

Introducción: La reanimación cardiopulmonar precoz y eficaz se ha convertido en el predictor más importante de supervivencia y calidad de vida a largo plazo en pacientes con paro cardiorrespiratorio extrahospitalario. Ante la importancia y la necesidad de extender la enseñanza de la reanimación cardiopulmonar a toda la población, se consideró la etapa infantil importante, para generar un primer acercamiento a las acciones iniciales que conforman el soporte vital básico que incentiva el desarrollo de competencias ciudadanas como primer respondiente ante situaciones de emergencia en edad escolar. Metodología: estudio descriptivo que presenta el diseño de una intervención educativa para aproximar a niños escolarizados de 5 a 7 años al soporte vital básico. Muestra: 67 niños y niñas de una institución educativa de la ciudad de Bogotá, Colombia. Muestreo por conveniencia. La intervención consta de dos sesiones educativas virtuales a través de la plataforma Teams, basadas en el modelo de transferencia de procesos de pensamiento a la enseñanza y el aprendizaje. Para esto se utilizó el cuento “Calixto y el bocado de manzana” y la canción “Salva a un amigo”, obras creadas por el proyecto UN Salvavidas. Así mismo, se crearon los títeres Calixto el gato, la oveja y la gallina, personajes de las obras mencionadas y cinco videoclips de apoyo. Se tuvieron en cuenta los aspectos éticos de respeto, privacidad, búsqueda del bien y justicia, consentimiento y el asentimiento de los participantes. Resultados: Al finalizar las sesiones los niños estuvieron en la capacidad de enunciar y reconocer las situaciones de peligro, el número de emergencia y las condiciones para activar este sistema, las características de una persona que requiere reanimación cardiopulmonar y cómo actuar. Conclusiones: la estrategia didáctica contenida en la intervención, mediante presentaciones audiovisuales repetitivas resultó ser eficaz para el aprendizaje en la etapa escolar, además, la formación desde esta etapa asegura a futuro que haya más personas de la sociedad que sepan intervenir ante situaciones de emergencia.
Labor Market Discrimination Against Venezuelans in Peru: Evidence from a Correspondence Study
Authors: Torres Javier , Herz Santiago , Pérez Abel , Barrón Manuel 
Published: January 2025

Through a correspondence study in Peru between July and September of 2021, we analyze the probability of Peruvian and Venezuelan applicants receiving callbacks to participate in a second stage of a job selection process. We studied the difference in the response rate by nationality, and tested potential mechanisms to reduce it, like holding a temporary residence permit (PTP) or having previous work experience in Peru. We find evidence of discrimination towards Venezuelan immigrants, as they have 4 percentage points less probability of receiving a callback than their Peruvian counterpart (a 43% difference with the control group rate). While previous work experience in Peru offsets the gap, holding a PTP does not attenuate employment discrimination.