bluuebunny/crossref_metadata_2025_split huggingface dataset:
Critical Contribution of Mesoporosity to the Stability of Zeolitic Catalysts for Oleate Isomerization in Continuous Flow Reactor
Authors: Cantor Jonathan F. Sierra , Gimello Olinda , Rivière Maxime , Petitjean Hugo , Bernardi Luca , Aubert‐Pouëssel Anne , Guerrero‐Fajardo Carlos‐Alberto , Renzo Francesco Di , Tanchoux Nathalie , Gérardin Corine 
Published: January 2025

AbstractTwo types of hierarchical micro‐mesoporous materials, as prepared from the zeolites with structure of 10‐MR (10‐membered rings) ferrierite and 12‐MR faujasite Y, have been tested as catalysts of isomerization of methyl oleate in continuous flow conditions. The catalysts have been characterized by X‐ray diffraction (XRD), nitrogen physisorption, transmission electron microscopy (TEM), NH3 thermal programmed desorption (TPD), and 27Al MAS NMR. The reaction products have been identified by GC–MS and MALDI–TOF/TOF–MS, quantified by GC–FID, and their cold‐flow properties for use as diesel biofuel have been evaluated by differential scanning calorimetry (DSC). The preparations of catalysts by recrystallization in cetyltrimethylammonium (CTA) solution have produced different structural mesoporosity in the two kinds of zeolites, with filling of previous mesopores in faujasite and opening of a bottle‐necked negative‐crystal mesoporosity in ferrierite. This last type of material has remarkably improved the stability of the isomerization reactions, with 98 wt% conversion of methyl oleate and 55% selectivity of branched monoenoic fatty esters upon 8 h time‐on‐flow, an uncommon result among the literature available on the continuous‐flow experiments. The better results obtained on ferrierite catalysts, with crystallization points on the average 8 °C lower than for faujasite catalysts, have confirmed the shape selectivity of ferrierite structure for alkene isomerization reactions.
Exhaust Treatment for Engines Operated with the Synthetic Diesel Fuel OME: Low‐Temperature Oxidation of Formaldehyde and CO by Pt/Ceria Catalysts
Authors: Eisenbeil Daniel , Haas Michael , Dreizler Andreas , Votsmeier Martin 
Published: January 2025

AbstractC1‐based synthetic fuels like oxymethylene ether (OME) are sulfur‐free, and their combustion forms negligible amounts of soot. This results in reduced ageing requirements and can enable the development of cost‐efficient catalyst technologies. This work focuses on the catalytic oxidation of formaldehyde (HCHO), which is increasingly formed during the combustion of C1‐based fuels such as OME, methanol, or CH4. The oxidation of HCHO on Pt/Al2O3 is inhibited by CO, so that in real exhaust containing CO and NO, full conversion of HCHO is only observed at ∼200 °C. The main discovery of this paper is that on Pt/ceria the oxidation of HCHO is not inhibited by CO, so that full conversion of HCHO is achieved already at ∼100 °C even in the presence of CO. To demonstrate the performance of the new catalyst under realistic operating conditions, a dynamic HCHO dosing unit was developed, allowing to reproduce transient vehicle driving cycles on a lab‐scale test rig. Using this novel setup, the Pt/ceria catalyst shows virtually full conversion of HCHO (99,8%) and CO (98,5%) over an OME cold‐start driving cycle, where the conventional Pt/Al2O3 oxidation catalyst with four‐times higher Pt loading shows only 81% and 62% conversion, respectively.
Effect of potassium‐waterglass composition on strength development and leaching behavior of geopolymers in different curing conditions
Authors: Siciliano Umberto C. C. S. , Trindade Ana C. C. , Silva Flávio de Andrade 
Published: January 2025

AbstractThis study delves into the impact of different potassium‐waterglass (K‐WG) compositions on the early reaction dynamics and strength evolution in metakaolin‐based geopolymers (GP). By maintaining a constant SiO2/Al2O3 ratio of 4, the study explores the influence of varying H2O/K2O and K2O/Al2O3 ratios on GP properties under both dry and saturated curing conditions. Early reaction kinetics are examined using isothermal calorimetry at room temperature (21°C), and pH measurements provide insights into alkali leaching. A strong correlation was found between total heat release and strength gain, as evidenced by ultrasonic cement analyzer (UCA) readings. The study further identifies that increased H2O/K2O ratios prolong setting times and delay the geopolymerization peaks, while a higher K2O/Al2O3 ratio enhances the geopolymerization process. Vicat tests confirmed the results obtained by calorimetry and UCA: only the GP4 formulation (H2O/K2O = 8.7 and K2O/Al2O3 = 1.3) hardened in less than 7 days. Additionally, it was found that saturated curing conditions decelerate strength development, with an initial notable decline in compressive strength at 24 h compared with dry curing. However, this difference diminishes to a negligible 7.6% after 3 days. Optimal ratios of H2O/K2O = 8.7 and K2O/Al2O3 = 1.3 were determined to be critical for achieving reliable strength measurements at 1 day of curing. pH assessments indicated strong water resistance in all GP formulations, with leaching primarily governed by diffusion mechanisms. Specifically, the K‐WG composition with SiO2/K2O = 1.53 and H2O/K2O = 8.69 showcased minimal leachability. These fundamental findings are crucial for the later design of GP materials that require rapid strength development, especially crucial for applications necessitating cementing under extreme conditions, such as deep‐sea drilling, geothermal energy production, and high‐temperature industrial processes.
Rapid on‐site evaluation using telecytology: Quality assurance study at a high‐volume cancer center
Authors: Alhamar Mohamed , Rudomina Dorota , Wang Lu , Feratovic Rusmir , Oen Handy , Lin Oscar , Wei Xiao‐Jun 
Published: January 2025

AbstractBackgroundTelecytology‐assisted rapid on‐site evaluation (ROSE) offers a cost‐effective method to enhance minimally invasive biopsies like fine needle aspiration and core biopsies with touch preparation. By reducing nondiagnostic sampling and the need for repeat procedures, ROSE via telecytology facilitates prompt triage for ancillary tests, improving patient management. This study examines cases initially deemed adequate for diagnosis during telecytology‐assisted ROSE but later categorized as nondiagnostic at final evaluation (NDIS).DesignWe performed a retrospective analysis of telecytology‐assisted ROSE cases over 7 years at a major cancer center, focusing on fine needle aspiration and touch preparation of core biopsies. Each case was thoroughly reviewed, correlating with clinical data and concurrent core biopsies or subsequent excisions. The study identified leading factors contributing to NDIS.ResultsThe average NDIS rate was 0.06% (42/70,612). Misinterpretation of benign or reactive cells as neoplastic was the leading cause (76.2%) of discrepancies between original ROSE and final diagnosis. Kidney biopsies had the highest NDIS rate (0.90%), primarily because of misinterpreting nonneoplastic cells. Thyroid biopsies were linked to quantitative threshold issues (0.10%). NDIS events were most associated with misinterpretation in kidney, pancreas, gastrointestinal tract, and lung biopsies.ConclusionIn conclusion, the NDIS rate in telecytology‐assisted ROSE is low, but quality assurance identified areas for improvement. Recognizing site‐specific pitfalls during telecytology‐assisted ROSE can enhance diagnostic accuracy and optimize patient care.
Single GAF Domain Phytochrome Exhibits a pH‐Dependent Shunt on the Millisecond Timescale
Authors: Trunk Florian , Köhler Lisa , Fischer Tobias , Gärtner Wolfgang , Song Chen , Slavov Chavdar , Wachtveitl Josef 
Published: January 2025

AbstractThe light‐sensing activity of phytochromes is based on the reversible light‐induced switching between two isomerization states of the bilin chromophore. These photo‐transformations may not necessarily be only unidirectional, but could potentially branch back to the initial ground state in a thermally driven process termed shunt. Such shunts have been rarely reported, and thus our understanding of this process and its governing factors are limited. Here, we aim to close this gap by providing coherent experimental evidence of a shunt process using UV/Vis laser flash photolysis. We studied the Pfr to Pr dynamics of the single GAF domain (g1) construct of the knotless phytochrome All2699 from cyanobacterium Nostoc punctiforme. We identified a shunt that can be switched on and off by ambient buffer conditions. In combination with H/D exchange and kinetic modeling, we propose a keto‐enol tautomerism to allow for the thermal isomerization of the chromophore and act as the driver of the shunt transition.
Effect of Carbon Nanotubes Conductors on Electrolyte Wettability and Electrochemical Performance of Lithium‐Ion Battery Electrodes
Authors: Dong Shaohai , Lyu Yuhang , Guo Zhan‐Sheng 
Published: January 2025

AbstractElectrolyte wettability significantly effects the electrochemical performance of lithium‐ion batteries (LIBs). In this study, buoyancy testing is employed to accurately measure the force‐time curve of electrolyte penetration into the electrodes and thereby calculate the wettability rate. Electrochemical performance is comprehensively evaluated through CR2025 coin half‐cell testing, four‐point probe analysis, and C‐rate cycling experiments. The effects of conductive agent content, morphology, and size on wettability, conductivity and electrochemical performance are investigated. The results show that carbon nanotube (CNT) conductive agent have strong effect on electrolyte wettability, conductivity, and electrochemical performance. Specifically, electrodes with 3 % CNT content show a 48.9 % increase in wettability, a 95.7 % reduction in electrode resistance, and a 10 % increase in cycle life compared to 1 % CNT. The results show that wettability and conductivity have an equally important effect on electrochemical properties. Larger CNT sizes improve wettability but increase electrode resistance, negatively impacting LIB performance. CNT conductive agents facilitate electrolyte movement along the nanotubes, reducing tortuosity and enhancing wettability. Optical observation of the wetting process on the surface and cross‐section of the pure conductive agent electrode strongly supports this conclusion. These results provide valuable insight into optimizing LIB performance by manipulating CNT properties and incorporating them as conductive agents.
Saudi Young Women #Activism: The Online Discourse Against the Male Guardianship System
Authors: Khalid Rola 
Published: January 2025

AbstractIn Saudi Arabia, it is illegal for women to constitute political parties, form civil society organizations, or participate in political demonstrations. Nonetheless, Saudi Arabia young women have had the chance to take advantage of social media's ability to bring sociopolitical change, to freely express themselves, fight for their rights, voice their opinions, and draw attention to and confront the country's oppressive political and social conditions for women, particularly the male guardianship system. The #EndMaleGuardianshipSystem Twitter campaign, which started in 2016, has received the most attention out of all the women's online campaigns in Saudi Arabia. Twitter's ability to organize, record, and publicize content has given young Saudi women the confidence to voice their social and political ideas and demands and to campaign against this system. This article assesses the communication tactics and online discourse used by Saudi young women in their hashtag activism against the male guardianship system while addressing the question: What kind of online discourse was produced and shared against the male guardianship system? For this purpose, an online observation was conducted for the (سعوديات نطالب باسقاط الولاية# [#EndMaleGuardianshipSystem]), where three thousand tweets were collected and analyzed using the qualitative content analysis method. The research led to the identification of three communication strategies that were used by Saudi women: (1) political soft and assertive communication strategy; (2) religious medium and persuasive communication strategy; and (3) social hard and educative communication strategy.
Zayani, Mohammed, and Joe F. Khalil. 2024. The Digital Double Bind: Change and Stasis in the Middle East. New York: Oxford University Press
Authors: Anderson Jon W. 
Published: January 2025

AbstractSummarizing the past twenty‐plus years of internet media studies on the Middle East, this study pulls together thinking and findings about digital citizenship, frames, and sites of contention, “new” voices and “virtual” lives online, e‐commerce and “knowledge” economies, “connected” culture and digital identities in the region. Its overall methodology is to assess how large, generic models apply to regional experience. The authors, who work and teach there, press beyond older diffusion‐of‐innovations paradigms to remap stasis and change bracketed by interplays of informational freedom and state management of communication as digital double binds, finding liberalizations on the margins more of personal and artistic expression than of political mobilization.
Association of Phosphate Supplements With Refeeding Oedema in Restrictive Eating Disorders
Authors: Khatri Vishnupriya , Stein Amy , Mehler Philip S. , Gibson Dennis 
Published: January 2025

ABSTRACTObjectiveRefeeding oedema, believed to result from the effects of insulin on renal sodium retention and subsequent oedema formation, typically occurs during the first 2 weeks after reintroduction of nutrition in individuals with severe malnutrition and can intensify body image distress in patients with eating disorders (EDs). Phosphate supplements have been found to increase insulin sensitivity, and it is hypothesised that they may also contribute to refeeding oedema in patients with EDs.MethodIn this retrospective cohort study of 633 patients with severe malnutrition due to anorexia nervosa (AN) or avoidant restrictive food intake disorder (ARFID), the impact of phosphate supplementation on the rate of weight gain was investigated.Results39% of patients required treatment with phosphate supplements during their hospital course. Patients in the phosphate supplement group had significantly more weight gain than the cohort who did not receive a phosphate supplement (p < 0.05). The rate of weight gain also increased, in the phosphate supplement group, as admission body mass index decreased.ConclusionsThis is the first study to suggest that crucial phosphate supplementation contributes to refeeding oedema in patients with EDs. Future studies should seek to better understand the relationship between phosphate supplementation and weight trends in order to optimise clinical management.
The Effect of Compulsory Schooling on Vaccination Against COVID
Authors: Monsees Daniel , Schmitz Hendrik 
Published: January 2025

ABSTRACTWe study the effect of education on vaccination against COVID in Germany in a sample of individuals above the age of 60. In ordinary least squares regressions, we find that, in this age group, one more year of education goes along with a 0.7 percentage point increase in the likelihood to get a COVID vaccination. In two stage least squares regressions where changes in compulsory schooling laws are used as exogenous variation for education, the effect of an additional year of education is estimated to be zero. The results hold for the compliers to the policy change which are older individuals at the lowest margin of education.
A low‐cost and high‐fidelity animal model for nonpalpable implant removal: A pilot study
Authors: Chene Gautier , Cerruto Emanuele , Nohuz Erdogan 
Published: January 2025

SynopsisOur preliminary results seem to confirm that our low‐cost animal model training for deep contraceptive implant removal might be an easy‐to‐use and reproducible training program.
Active Retirement‐w: A Qualitative Case Study of Retirement to Work Career Transition in Pakistan
Authors: Asif Laraib , Qureshi Henna A. , Jahan Nadia 
Published: January 2025

ABSTRACTThe career development cycle of an individual's work life culminates at the retirement stage. However, research indicates that many people tend to work after the retirement stage due to various socioeconomic and personal needs. The issues and challenges faced by individuals seeking post‐retirement work are a less explored area. Therefore, there was a need to address the challenges of the growing number of retirees re‐entering the labor force. The present study focuses on the challenges faced by individuals seeking post‐retirement work in Pakistan and the need for career counseling services in Pakistan. This is an exploratory qualitative study. Fifteen in‐depth interviews were conducted with individuals seeking post‐retirement work. The data were collected through purposive and snowball sampling techniques. The interviews were recorded, transcribed, and coded simultaneously. Reflexive Thematic Analysis by Braun and Clark guided the analysis process. Three major themes emerged with multiple subthemes and supporting codes that include (i) prevalent practices, (ii) labor market challenges, and (iii) adjustment strategies. The findings of the study suggest a career guidance framework for active retirement‐w. The framework may be used by career guidance experts and the HR departments to make the career transition smooth for individuals seeking active retirement.
Experimental and Computational NMR Studies of Large Alkaloids Exemplified With Vindoline Trimer: Advantages and Limitations
Authors: Semenov Valentin A. , Zinchenko Sergey V. , Massiot Georges , Krivdin Leonid B. 
Published: January 2025

ABSTRACTThe complete 1H and 13C NMR assignments of a trimeric vindoline together with its individual components, dimeric vindolicine and monomeric vindoline, are performed based on a thorough analysis of the ROESY, COSY, HSQC, and HMBC spectra in combination with the state‐of‐the‐art quantum‐chemical calculations. A spatial structure of vindoline trimer is determined by means of computational conformational analysis in combination with the probability distribution map of its basic conformers. On the example of monoterpene indole alkaloid, the trimer vindoline, the present study reveals the power of modern computational NMR to perform identification and stereochemical studies of large natural compounds with some limitations, which may arise in the quantum chemical computing workflow.
Salmonellentest in der Pipettenspitze
Authors: Ehrensberger Christian 
Published: January 2025

AbstractÜber einen roten Farbfleck zeigt ein neuer Biosensor an, wenn Lebensmittel eine gesundheitsgefährdende Konzentration des Bakteriums Salmonella typhimurium enthalten. Der Test lässt sich außerhalb eines Analytiklabors durchführen und liefert innerhalb einer Stunde Ergebnisse.
Wie sich Recyclingprodukte schützen lassen
Authors: Bettermann Alexandra , Marsch Miriam 
Published: January 2025

AbstractNeu und erfinderisch müssen Produkte oder Techniken sein, die patentiert werden sollen – bei Recyclingmaterialien oder ‐prozessen ist das oft schwierig nachzuweisen. Es kann helfen, Patentschutz‐Kategorien zu kennen und diese kreativ sowie mit fachkundiger Beratung zu nutzen.
„Platz für Neugier und das Spielerische einräumen“
Authors: Simmchen Juliane 
Published: January 2025

AbstractEin Preis für Neugier? Warum nicht, dachte sich der Physiker Mario Markus und stiftete kurzerhand einen Preis für ludische Wissenschaften. Für die damit ausgezeichnete Juliane Simmchen ist die curiosity driven science – also Forschen aus Lust am Entdecken – nicht nur bloßer Luxus, sondern ein goldener Weg zu Entdeckungen.
Nachruf: Andrew Victor Schally (1926 – 2024)
Authors: Engel Jürgen , Kleemann Axel , Offermanns Heribert 
Published: January 2025

AbstractAndrew Victor Schally gelangte zu höchsten akademischen Ehrungen – seine Forschung setzte aber auch für die Arzneimittelentwicklung Maßstäbe.
Silikone zu neuem Leben erwecken
Authors: Wolf Andreas T. 
Published: January 2025

AbstractVon Schnuller und Handyhülle bis zu Baudichtstoff oder Herzschrittmacher – Silikone sind derzeit unverzichtbar. Aus Silikonabfällen Rohstoffe zurückzugewinnen, trägt zu einer umwelt‐ und ressourcenschonenden Kreislaufwirtschaft bei.
Der molekulare Riecher
Authors: Groß Michael 
Published: January 2025

AbstractSeit den 1990er Jahren sind die Rezeptoren des Geruchssinns bekannt – erst jetzt erschließen Strukturuntersuchungen ihre Erkennungsmechanismen. Gerüche vorherzusagen und neue Geruchsstoffe zu entwerfen, ist noch schwierig; dabei soll nun künstliche Intelligenz helfen.
Mechanistic Multiscale Simulations and Charge Transport Properties of Amorphous and Crystalline α‐NPD Molecular Conformations: Insights From Molecule to Material Level
Authors: Koudjina Simplice , Kumar Vipin , Tripathi Anuj , Atohoun Guy Yacole Sylvain , Gbenou Joachim Djimon , Chetti Prabhakar 
Published: January 2025

ABSTRACTThe optoelectronic and charge transfer integral properties of N,N′‐di(1‐naphthyl)‐N,N′‐diphenyl‐4,4′‐diamine (α‐NPD) organic light‐emitting diode (OLED) in amorphous and crystalline structures is studied based on the Marcus–Levitch–Jortner theory and quantum chemistry calculations. The charge transfer integral simulations have been investigated through hole‐hopping regime from molecule‐to‐molecule in dimers molecules and are determined by frontier molecular orbitals (FMOs) for hole and electron transport. Quantum approaches with TD/DFT and DFT have been used to describe the most relevant electronic transitions of α‐NPD, which present character in harmony with the solvent states. Furthermore, the obtained results reveal that geometric deformations have been relied to naphthalene form and benzene rings in α‐NPD structures, and the charge transfer integral in amorphous state shows and , and in the crystalline state, it shows and . Comparing the transfer integrals average of hole/electron in the both amorphous and crystalline states, a higher value of hole transfer is explored in the amorphous form. The charge transfer transition obtained from FMO states and density of states (DOS), as well as reorganization energies values, indicates that α‐NPD would be an effective organic electronic hole transport material.
Connections After Cancer: Adolescent and Young Adult Survivors' Perspectives on Forming New Friendships After Cancer
Authors: Miron Carly D. , Ahmad Zeba N. , Ford Jennifer S. 
Published: January 2025

ABSTRACTObjectiveThe psychological and social challenges of an adolescent and young adult (AYA) cancer diagnosis often transcend physical health, impacting one's social network during a time when peer connections may be most crucial for support. The current study examines adolescent and young adult (AYA) cancer survivors' perspectives on how cancer impacts their thoughts and behaviors toward forming new peer relationships.MethodsThirty‐five YA survivors (Mean age = 33 ± 5.67 years) diagnosed with cancer between 18 and 39 years participated in individual semi‐structured interviews. Interviews were coded and analyzed to identify major themes.ResultsWhen pursuing friendships with non‐cancer peers, survivors mentioned discomfort in disclosing, connection through mutual hardship, and revised outlooks on friendship. While befriending new non‐cancer peers offered opportunities to be surrounded by positive people, seeking out these friendships was complicated by a desire to find people who understood hardship and could respond well to their cancer status. When forming relationships with cancer peers, AYAs emphasized the shared cancer experience, wariness of negative exposures, and consideration of similarity in cancer factors. They sought shared understanding and validation from cancer peers but were also cautious about exposure to reminders of illness and mindful that certain dissimilarities could hinder the establishment of meaningful connections.ConclusionsFindings provide insight into the complex ways that cancer shapes AYA survivors' approach to forming friendships post‐diagnosis, presenting guidance on tailored support interventions and resources that can aid in fostering healthy peer relationships and enhance well‐being among AYA survivors.