bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fabrication of Carbon‐Based ZnBi2S4 and ZnBi2Se4 Nanocomposites for Photocatalytic and Electrochemical Applications
Authors: Jasmine Jeyakumar , Muruganandam Ponvel Kanagasabai 
Published: December 2023

AbstractMetal chalcogenide nanoparticles are widely used to degrade environmental pollutants. Zinc‐Bismuth Chalcogenide/Carbon (ZnBi2S4/Carbon and ZnBi2Se4/Carbon) nanocomposites were synthesized and the surface was covered with sucrose before carbonization to yield carbon nanocomposites. The solar irradiation is used to convert sucrose into carbon nanocomposites. The as‐synthesized nanocomposites were well characterized in detail in terms of their structural, morphological, functional, and optical properties. Nanocomposites are well‐known and frequently show excellent characteristics in all domains, including photocatalysis and electrochemical applications. The superior electron transfer capability, improved light harvesting, and increased catalytic active sites were said to play a crucial role in the bandgap contribution to the improved photocatalytic activity. The degradation of dyes like Methylene Blue (MB), Methyl Orange (MO), and Rhodamine B (RhB) in solution under sunlight irradiation was used to investigate the photocatalytic activities of the nanocomposites. Pseudo‐first‐order kinetic theory was followed. Specific capacitances of nanocomposites are 659.479 F/g and 871.198 F/g at 25 mV/s for ZnBi2S4/Carbon and ZnBi2Se4/Carbon nanocomposites, respectively.
Synthesis and Metal‐Complexation of a Trimer of Dendrimers with Bipyridine Cores in the Center of Conjugated Chains
Authors: Sawada Ayaka , Tachi Yoshimitsu , Kozaki Masatoshi 
Published: December 2023

AbstractTwo types of dendrimers with a bipyridine unit in the center of their rigid backbones were prepared. One dendrimer has two azide groups and the other has one ethynyl terminal. These dendrimers were coupled by the copper‐mediated Hüisgen 1,3‐dipolar cycloadditions of the ethynyl and azide terminals to afford a trimer with three bipyridine cores. The addition of Fe(II) to a solution of the trimer resulted in an absorption change characteristic of the formation of tris(bipyridine)Fe(II) complexes. The structural properties of the tris(bipyridine)Fe(II) core are likely reflected in the conformation of the timer because the bipyridine units are attached to the rigid backbones.
Acid‐Catalyzed Tandem Ritter and Mannich Reactions for Direct Access to 3‐Aryl 3‐amidooxindoles from Isatin
Authors: Karu Sudheer Kumar , Pilli Navyasree , Malapaka Chandrasekharam 
Published: December 2023

AbstractThree‐component tandem Ritter and Mannich reactions were developed for one‐pot arylation and acyl protected amination of isatin. The acid catalyzed reaction produced wide variety of 3‐aryl‐3‐amidooxindoles directly from commercially available isatin. The C3 functionalization of isatin is affected by condensation with electron rich arenes and nitriles or amides with concomitant C−C and C−N bonds formation. Substituted isatins, different nucleophiles (cyclic and acyclic N, N‐disubstituted arylamines), aliphatic nitriles, and amides expanded the scope of the reaction. The reaction is simple, general, efficient and can switch the amidation substrate from nitriles in Ritter reaction to amides in Mannich reaction.
Distal Functional Group Migration of Unactivated Alkenes with IMDN‐Tf Reagents
Authors: Zhang Yuan , Wang Ying , Zou Zhenlei , Yan Liang , Wang Yi 
Published: December 2023

AbstractThe difunctionalization of alkenes involving 1,5‐functional group migration strategies for the conversion of versatile and readily available olefins into more structurally complex molecules has been greatly studied. However, the vast majority of the reported reactions rely on strongly oxidizing conditions and oxidizing fluoroalkyl radical reagents. In contrast, few reactions with reduced radical reagents have been reported. This work describes a photo / electroredox catalytic condition for difunctional modification of unactivated olefins via a radical process using IMDN‐Tf reagents with broad substrate scope and excellent tolerance.
Pd(OAc)2/Xantphos Catalyzed Reductive Coupling of Sulfonyl Chlorides: Synthesis of Thioethers by Sulphur Dioxide Extrusion
Authors: Zhang Guofu , Sang ZhiMin , Wang QingHai , Chen JingAo , Ding Chengrong 
Published: December 2023

AbstractHerein, we reported a successful cross coupling of aryl sulfonyl chlorides to forge thioether skeleton via Pd catalysis. This transformation proceeded in the presence of Xantphos. Preliminary mechanism studies demonstrated dual roles of Xantphos: (i) a reductant that reduced sulfonyl radical to thio radical; (ii) a ligand that promotes coupling reactions.
Metal Halide Nanocrystals@Silica Aerogel Composite with Enhanced Dispersion Stability and Light Output for Efficient X‐Ray Imaging in Harsh Environment
Authors: Han Lili , Zhao Jihao , Wang Lijuan , Peng Guoqiang , Xu Youkui , Yuan Minglang , Miao Yifan , Ci Zhipeng , Jin Zhiwen 
Published: December 2023

AbstractMetal halide nanocrystals (MHNCs) embedded in a polymer matrix as flexible X‐ray detector screens is an effective strategy with the advantages of low cost, facile preparation, and large area flexibility. However, MHNCs easily aggregate during preparation, recombination, under mechanical force, storage, or high operating temperature. Meanwhile, it shows an unmatched refractive index with polymer, resulting in low light yield. The related stability and properties of the device remain a huge unrevealed challenge. Herein, a composite screen (CZBM@AG‐PS) by integrating MHNCs (Cs2ZnBr4: Mn2+ as an example) into silica aerogel (AG) and embedded in polystyrene (PS) is successfully developed. Further characterization points to the high porosity AG template that can effectively improve the dispersion of MHNCs in polymer detector screens, essentially decreasing nonradiative transition, Rayleigh scattering, and performance aging induced by aggregation in harsh environments. Furthermore, the higher light output and lower optical crosstalk are also achieved by a novel light propagation path based on the MHNCs/AG and AG/PS interfaces. Finally, the optimized CZBM@AG‐PS screen shows much enhanced light yield, spatial resolution, and temperature stability. Significantly, the strategy is proven universal by the performance tests of other MHNCs embedded composite films for ultra‐stable and efficient X‐ray imaging.
An Asymmetric Layer Structure Enables Robust Multifunctional Wearable Bacterial Cellulose Composite Film with Excellent Electrothermal/Photothermal and EMI Shielding Performance
Authors: Yang Yanlong , Shao Liang , Wang Jie , Ji Zhanyou , Zhang Tao , Wu Mingjie , He Yingkun , Wang Caiyun , Ma Jianzhong 
Published: December 2023

AbstractHighly robust flexible multifunctional film with excellent electromagnetic interference shielding and electrothermal/photothermal characteristics are highly desirable for aerospace, military, and wearable devices. Herein, an asymmetric gradient multilayer structured bacterial cellulose@Fe3O4/carbon nanotube/Ti3C2Tx (BC@Fe3O4/CNT/Ti3C2Tx) multifunctional composite film is fabricated with simultaneously demonstrating fast Joule response, excellent EMI shielding effectiveness (EMI SE) and photothermal conversion properties. The asymmetric gradient 6‐layer composite film with 40% of Ti3C2Tx possesses excellent mechanical performance with exceptional tensile strength (76.1 MPa), large strain (14.7%), and good flexibility. This is attributed to the asymmetric gradient multilayer structure designed based on the hydrogen bonding self‐assembly strategy between Ti3C2Tx and BC. It achieved an EMI SE of up to 71.3 dB, which is attributed to the gradient “absorption–reflection–reabsorption” mechanism. Furthermore, this composite film also exhibits excellent low‐voltage‐driven Joule heating (up to 80.3 °C at 2.5 V within 15 s) and fast‐response photothermal performance (up to 101.5 °C at 1.0 W cm−2 within 10 s), which is attributed to the synergistic effect of heterostructure. This work demonstrates the fabrication of multifunctional bacterial cellulose@Fe3O4/carbon nanotube/Ti3C2Tx composite film has promising potentials for next‐generation wearable electronic devices in energy conversion, aerospace, and artificial intelligence.
Aminal‐Linked Covalent Organic Framework Membranes Achieve Superior Ion Selectivity
Authors: Guo Rui , Zha Zhiyuan , Wang Jixiao , Wang Zhi , Guiver Michael D. , Zhao Song 
Published: December 2023

AbstractHigh‐salinity wastewater treatment is perceived as a global water resource recycling challenge that must be addressed to achieve zero discharge. Monovalent/divalent salt separation using membrane technology provides a promising strategy for sulfate removal from chlor‐alkali brine. However, existing desalination membranes often show low water permeance and insufficient ion selectivity. Herein, an aminal‐linked covalent organic framework (COF) membrane featuring a regular long‐range pore size of 7 Å and achieving superior ion selectivity is reported, in which a uniform COF layer with subnanosized channels is assembled by the chemical splicing of 1,4‐phthalaldehyde (TPA)‐piperazine (PZ) COF through an amidation reaction with trimesoyl chloride (TMC). The chemically spliced TPA‐PZ (sTPA‐PZ) membrane maintains an inherent pore structure and exhibits a water permeance of 13.1 L m−2 h−1 bar−1, a Na2SO4 rejection of 99.1%, and a Cl−/SO42− separation factor of 66 for mixed‐salt separation, which outperforms all state‐of‐the‐art COF‐based membranes reported. Furthermore, the single‐stage treatment of NaCl/Na2SO4 mixed‐salt separation achieves a high NaCl purity of above 95% and a recovery rate of ≈60%, offering great potential for industrial application in monovalent/divalent salt separation and wastewater resource utilization. Therefore, the aminal‐linked COF membrane developed in this work provides a new research avenue for designing smart/advanced membrane materials for angstrom‐scale separations.
Hydrogen Spillover Induced PtCo/CoOx Interfaces with Enhanced Catalytic Activity for CO Oxidation at Low Temperatures in Humid Conditions
Authors: Lin Jiajin , Zhao Shuaiqi , Yang Jin , Huang Wei‐Hsiang , Chen Chi‐Liang , Chen Tingyu , Zhao Yun , Chen Guangxu , Qiu Yongcai , Gu Lin 
Published: December 2023

AbstractThe development of catalysts with abundant active interfaces for superior low‐temperature catalytic CO oxidation is critical to meet increasingly rigorous emission requirements, yet still challenging. Herein, this work reports a PtCo/CoOx/Al2O3 catalyst with PtCo clusters and enriched Pt─O─Co interfaces induced by hydrogen spillover from the Pt sites and self‐oxidation process in air, exhibiting excellent performance for CO oxidation at low temperatures and humid conditions. The combination of structural characterizations and in situ Fourier transform infrared spectroscopy reveals that the PtCo cluster effectively prevents CO saturation/poisoning on the Pt surface. Additionally, the presence of Pt─O─Co interfaces in the PtCo/CoOx/Al2O3 catalyst provides a significant number of active sites for oxygen activation and ─OH formation. This facilitates efficient generation of CO2 at ambient temperature by coupling with nearby adsorbed CO molecules, resulting in superior low‐temperature activity and long‐term stability for CO oxidation under humid conditions. This work provides a facile route toward rationalizing the design of catalysts with more active interfaces for superior low‐temperature CO oxidation under humid conditions for practical applications.
RSS and ROS Sequentially Activated Carbon Monoxide Release for Boosting NIR Imaging‐Guided On‐Demand Photodynamic Therapy
Authors: Dong Xuemei , Zhang Ziwen , Wang Rongchen , Sun Jie , Dong Chengjun , Sun Lixin , Jia Cai , Gu Xianfeng , Zhao Chunchang 
Published: December 2023

AbstractCarbon monoxide shows great therapeutic potential in anti‐cancer. In particular, the construction of multifunctional CO delivery systems can promote the precise delivery of CO and achieve ideal therapeutic effects, but there are still great challenges in design. In this work, a RSS and ROS sequentially activated CO delivery system is developed for boosting NIR imaging‐guided on‐demand photodynamic therapy. This designed system is composed of a CO releaser (BOD‐CO) and a photosensitizer (BOD‐I). BOD‐CO can be specifically activated by hydrogen sulfide with simultaneous release of CO donor and NIR fluorescence that can identify H2S‐rich tumors and guide light therapy, also depleting H2S in the process. Moreover, BOD‐I generates 1O2 under long‐wavelength light irradiation, enabling both PDT and precise local release of CO via a photooxidation mechanism. Such sequential activation of CO release by RSS and ROS ensured the safety and controllability of CO delivery, and effectively avoided leakage during delivery. Importantly, cytotoxicity and in vivo studies reveal that the release of CO combined with the depletion of endogenous H2S amplified PDT, achieving ideal anticancer results. It is believed that such theranostic nanoplatform can provide a novel strategy for the precise CO delivery and combined therapy involved in gas therapy and PDT.
Critical Binder‐to‐Powders Coverage Ratio for Faster Graphite/SiOx Electrode Formulation Optimization
Authors: Meyssonnier Clément , Merabet Amina , Dupré Nicolas , Paireau Cyril , Lestriez Bernard 
Published: December 2023

AbstractMastering electrodes’ formulations is a complex and tedious task, because for each composition of electroactive material(s) it is necessary to adjust the inactive additives nature and content to optimize battery performance. In this direction, the amount of binder is proposed to be adjusted to the surface developed by all of the powders involved in the composition of the electrode, i.e., the electroactive materials and electronic conductive additives. This concept, introduces here as binder‐to‐powders coverage ratio, relies upon the micromechanical models developed in the field of polymer‐based composite materials. The validity of this new electrode formulation parameter is shown here for two different SiOx/Graphite blends, which differ in the type of graphite, and for blends of two different binders, polyacrylic acid and styrene−butadiene rubber. At the optimal coverage ratio, a satisfactory capacity retention is obtained in full cell with an ethylene carbonate free and fluoroethylene carbonate rich electrolyte.
SCARS: Suturing wounds due to conflicts between non‐functional requirements in autonomous and robotic systems
Authors: Roy Mandira , Bag Raunak , Deb Novarun , Cortesi Agostino , Chaki Rituparna , Chaki Nabendu 
Published: December 2023

AbstractIn autonomous and robotic systems, the functional requirements (FRs) and non‐functional requirements (NFRs) are gathered from multiple stakeholders. The different stakeholder requirements are associated with different components of the robotic system and with the contexts in which the system may operate. This aggregation of requirements from different sources (multiple stakeholders) often results in inconsistent or conflicting sets of requirements. Conflicts among NFRs for robotic systems heavily depend on features of actual execution contexts. It is essential to analyze the inconsistencies and conflicts among the requirements in the early planning phase to design the robotic systems in a systematic manner. In this work, we design and experimentally evaluate a framework, called SCARS, providing: (a) a domain‐specific language extending the ROS2 Domain Specific Language (DSL) concepts by considering the different environmental contexts in which the system has to operate, (b) support to analyze their impact on NFRs, and (c) the computation of the optimal degree of NFR satisfaction that can be achieved within different system configurations. The effectiveness of SCARS has been validated on the iRobot Create3 robot using Gazebo simulation.
3D meso‐scale numerical model and dynamic mechanical behavior of reinforced concrete
Authors: Deng Y. J. , Li L. , Lv T. H. , Chen X. W. , Ye Z. J. 
Published: December 2023

AbstractBased on the modeling method of 3D meso‐scale finite element model of plain concrete, a 3D meso‐scale finite element model of reinforced concrete is established considering the interface transition zone between reinforcement frame and mortar, and the reliability of the established meso‐scale finite element model is verified by split Hopkinson pressure bar (SHPB) test results. The failure process of reinforced concrete specimens under typical impact velocity and the influence of interface effect on specimen strength are analyzed by numerical simulation. The research results show that the 3D meso‐scale model of reinforced concrete considers the meso‐scale structure of reinforced concrete more realistically, and can better reflect the damage change process inside the material in the dynamic loading process. The weak interface effect caused by reinforcement can lead to the slight weakening of the dynamic strength of the material, but at the same time the weak interface effect of the reinforcement is also the main reason why the residual form of reinforced concrete remains well aligned with the shape of the reinforcement frame after the failure.
Evaluation of the effects of multiple capture methods and immobilization drugs on mountain lion welfare
Authors: Dellinger Justin A. , Basto Ana F. , Vickers T. Winston , Wilmers Christopher C. , Sikich Jeffrey A. , Riley Seth P. D. , Gammons Daniel , Martins Quinton E. , Wittmer Heiko U. , Garcelon David K. , Allen Maximilian L. , Cristescu Bogdan , Clifford Deana L. 
Published: December 2023

AbstractUsing a dataset of 591 capture events between 2001–2019 in California, USA, we examined the impact of capture methods and immobilization drugs on mountain lion (Puma concolor) welfare. The 3 methods used to capture mountain lions were cage traps, trained hounds, and cable restraints. The drugs used to immobilize mountain lions were either tiletamine/zolazepam (Telazol®), ketamine/medetomidine, or ketamine/xylazine. Mortality occurred in 1.4% of captures, with only one mortality out of 310 captures occurring since 2012. We used a logistic regression framework to compare morbidity and vital parameters of mountain lions among the different capture methods and immobilization drugs used. Vomiting (a risk factor for developing aspiration pneumonia) was the most common severe risk factor associated with cage trapping and was only seen with the use of ketamine/medetomidine or ketamine/xylazine. Morbidity scores were not well predicted by any of the variables we accounted for. Animals immobilized with Telazol® were more likely to experience abnormal heart and respiratory rates, as well as high body temperatures, than those immobilized with the other two combinations. Although there are risks associated with each of the capture methods and drug combinations commonly used in mountain lion captures in California, our analyses demonstrated they are all relatively safe when following appropriate animal welfare practices. Our analyses suggested that unaccounted for factors are equally or more important in explaining injury and physiological abnormality rates, and we urge that agencies train personnel in best practices and conservative decision‐making in order to assure that the welfare of the animal takes precedence over collaring. We suggest training on how to choose between several capture techniques, immobilization drugs and monitoring methods and how to reduce both detrimental effects to mountain lions and danger to humans.
Engineering heterothallic strains in fission yeast
Authors: García‐Ruano Daniel , Hsu Ian , Leray Baptiste , Billard Bénédicte , Liti Gianni , Coudreuse Damien 
Published: December 2023

AbstractIn poor nitrogen conditions, fission yeast cells mate, undergo meiosis and form spores that are resistant to deleterious environments. Natural isolates of Schizosaccharomyces pombe are homothallic. This allows them to naturally switch between the two h− and h+ mating types with a high frequency, thereby ensuring the presence of both mating partners in a population of cells. However, alteration of the mating type locus can abolish mating type switching or reduce it to a very low frequency. Such heterothallic strains have been isolated and are common in research laboratories due to the simplicity of their use for Mendelian genetics. In addition to the standard laboratory strains, a large collection of natural S. pombe isolates is now available, representing a powerful resource for investigating the genetic diversity and biology of fission yeast. However, most of these strains are homothallic, and only tedious or mutagenic strategies have been described to obtain heterothallic cells from a homothallic parent. Here, we describe a simple approach to generate heterothallic strains. It takes advantage of an alteration of the mating type locus that was previously identified in a mating type switching‐deficient strain and the CRISPR‐Cas9 editing tool, allowing for a one‐step engineering of heterothallic cells with high efficiency.
Polynomial stability of one‐dimensional wave equation with local degenerate Kelvin–Voigt damping and discontinuous coefficients
Authors: Zhang Hua‐Lei 
Published: December 2023

AbstractIn this paper, we study the stability of one‐dimensional wave equation with local degenerate Kelvin–Voigt damping and discontinuous coefficients. The domain of the wave equation is a bounded interval. The support of the damping coefficient function is a subinterval of the bounded interval, which does not include the endpoints of the bounded interval. The damping coefficient function behaves like power functions near the endpoints of the subinterval. When the coefficients of the wave equation satisfy suitable regularity assumption, by the frequency domain method, we show that the energy of the wave equation decays polynomially and the decay rate depends on the exponents of power functions.
The impact of lager brewing yeasts on flavor stability of pilot-scale beer during storage
Authors: Murmann Anne N. , Bevilacqua Marta , Danielsen Bente P. , Jansson Therese , Engholm-Keller Kasper , Poojary Mahesha M. , Arneborg Nils , Lund Marianne N. 
Published: December 2023

AbstractThe aim of the present study was to investigate the impact of two lager brewing yeasts (KVL001 and KVL018), known to produce different levels of sulfite and thioredoxin, on the flavor stability of beer during storage for 24 weeks at 25 °C and 35 °C. Fermentations with the two yeast strains were carried out in two identical pilot scale brews and provided fresh beers with very similar sensory profiles, only differing significantly in content of sulfite, iron, thioredoxin, and free amino acids. No difference in protein thiols was observed indicating that thioredoxin was not active in the final beer. The yeast strain KVL018 consumed less free amino acids than KVL001 resulting in fresh beers with a higher content of free amino acids. During storage, the beers developed very similarly, but the beers fermented with KVL018 developed more 'fruity aged/vinous' flavor, especially at 35 °C. This suggested that a higher degree of the Maillard reaction took place in these beers due to the higher content of free amino acids. Beers fermented with KVL018 also contained more sulfite and less iron, but scored lower in the general evaluation of the sensory analysis. In conclusion, our results indicate that the yeast strain (KVL001) taking up more free amino acids resulted in more flavor-stable beer due to a lower degree of the Maillard reaction, while no clear effects were observed on oxidation.