bluuebunny/crossref_metadata_2025_split huggingface dataset:
Polyoxometalate‐Bridged Synthesis of Superstructured Mesoporous Polymers and Their Derivatives for Sodium–Iodine Batteries
Authors: Zhang Tingting , Wei Facai , Wu Yong , Li Wenda , Huang Lingyan , Fu Jianwei , Jing Chengbin , Cheng Jiangong , Liu Shaohua 
Published: April 2023

AbstractDespite the impressive progress in mesoporous materials over past decades, for those precursors having no well‐matched interactions with soft templates, there are still obstacles to be guided for mesoporous structure via soft‐template strategies. Here, a polyoxometalate‐assisted co‐assembly route is proposed for controllable construction of superstructured mesoporous materials by introducing polyoxometalates as bifunctional bridge units, which weakens the self‐nucleation tendency of the precursor through coordination interactions and simultaneously connects the template through the induced dipole–dipole interaction. By this strategy, a series of meso‐structured polymers, featuring highly open radial mesopores and dendritic pore walls composed of continuous interwoven nanosheets can be facilely obtained. Further carbonization gave rise to nitrogen‐doped hierarchical mesoporous carbon decorated uniformly with ultrafineγ‐Mo2N nanoparticles. Density functional theory proves that nitrogen‐doped carbon andγ‐Mo2N can strongly adsorb polyiodide ions, which effectively alleviate polyiodide dissolving in organic electrolytes. Thereby, as the cathode materials for sodium–iodine batteries, the I2‐loaded carbonaceous composite shows a high specific capacity (235 mA h g−1at 0.5 A g−1), excellent rate performance, and cycle stability. This work will open a new venue for controllable synthesis of new hierarchical mesoporous functional materials, and thus promote their applications toward diverse fields.
Prevalence and risk factors for subjective cognitive decline and the correlation with objective cognition among community‐dwelling older adults in China: Results from the Hubei memory and aging cohort study
Authors: Cheng Gui‐Rong , Liu Dan , Huang Lin‐Ya , Han Gang‐Bin , Hu Fei‐Fei , Wu Zhao‐Xia , He Xiao‐Ming , Huang Yu‐Wei , Yu Ya‐Fu , Xu Lang , Li Jin‐Quan , Chen Yu‐Shan , Wei Zhen , Wu Qiong , Mei Yu‐Fei , Chen Xing‐Xing , Ou Yang‐Ming , Zhang Jing‐Jing , Yang Meng‐Liu , Lian Peng‐Fei , Tan Wei , Xie Xin‐Yan , Zeng Yan 
Published: April 2023

AbstractINTRODUCTIONThe prevalence and risk factors for subjective cognitive decline (SCD) and its correlation with objective cognition decline (OCD) among community‐dwelling older adults is inconsistent.METHODSOlder adults underwent neuropsychological and clinical evaluations to reach a consensus on diagnoses.RESULTSThis study included 7486 adults without mild cognitive impairment and dementia (mean age: 71.35 years [standard deviation = 5.40]). The sex‐, age‐, and residence‐adjusted SCD prevalence was 58.33% overall (95% confidence interval: 58.29% to 58.37%), with higher rates of 61.25% and 59.87% in rural and female subgroups, respectively. SCD global and OCD language, SCD memory and OCD global, SCD and OCD memory, and SCD and OCD language were negatively correlated in fully adjusted models. Seven health and lifestyle factors were associated with an increased risk for SCD.DISCUSSIONSCD affected 58.33% of older adults and may indicate concurrent OCD, which should prompt the initiation of preventative intervention for dementia.Highlights
SCD affects 58.33% of older adults in China.
SCD may indicate concurrent objective cognitive decline.
Difficulty finding words and memory impairments may indicate a risk for AD.
The presence of SCD may prompt preventative treatment initiation of MCI or dementia.
Social network factors may be initial targets for the early prevention of SCD.
BN‐Butafulvene und ihre Anwendung in der Synthese von hochsubstituierten BN‐9,1‐Naphthalinen
Authors: Wang Junyi , Zhu Shuai , Ma Wangyang , Lin Zhenyang , Ye Qing 
Published: April 2023

AbstractBN‐Butafulvene, Mono‐BN‐Isostere von Butafulven und hochgespannte Isomere von Azaborinen und B‐Aminoborolen, wurden durch Hydrolyse der Urana‐Borabicyclus‐Komplexe synthetisiert, die aus der Reaktion von Bis(alkinyl)boranen mit einem Uranacyclopropen‐Komplex stammen. Ihre 4‐Dimethylaminopyridin (DMAP)‐Addukte können weiter zu 1,2,4,6‐multisubstituierten BN‐9,1‐Naphthalinen isomerisieren. Sowohl die NMR‐spektroskopische Reaktionsverfolgung als auch theoretische Berechnungen deuten auf einen Reaktionsmechanismus hin, der eine dearomative Insertion von DMAP gefolgt von zwei aufeinanderfolgenden 1,2‐Wasserstoffumlagerungen beinhaltet. Die photophysikalischen Untersuchungen der hochsubstituierten BN‐9,1‐Naphthaline zeigen eine bemerkenswerte Rotverschiebung, sowohl in den UV/Vis‐Absorptions‐ als auch in den Emissionsspektren. Die (TD)‐DFT‐Berechnungen bestätigen die experimentellen Daten und deuten darauf hin, dass die starke π‐donierende Aminosubstitution an den 1‐ und/oder 6‐Positionen das HOMO destabilisiert und somit zu einer bemerkenswerten Verringerung der HOMO–LUMO‐Lücke führt.
Diastereomer Resolution of M4L6 Coordination Cages by Ultra‐High‐Resolution Ion‐Mobility Mass Spectrometry
Authors: Pfrunder Michael C. , Marshall David L. , Poad Berwyck L. J. , Fulloon Therese M. , Clegg Jack K. , Blanksby Stephen J. , McMurtrie John C. , Mullen Kathleen M. 
Published: April 2023

AbstractCoordination cages can be used for enantio‐ and regioselective catalysis and for the selective sensing and separation of isomeric guest molecules. Here, stereoisomers of a family of coordination cages are resolved using ultra‐high‐resolution cyclic ion‐mobility mass spectrometry (cIM‐MS). The observed ratio of diastereomers is dependent on both the metal ion and counter ion. Moreover, the point groups can be assigned through complementary NMR experiments. This method enables the identification and interrogation of the individual isomers in complex mixtures of cages which cannot be performed in solution. Furthermore, these techniques allow the stability of individual isomers within the mixture to be probed, with the T‐symmetric isomers in this case shown to be more robust than the C3 and S4 analogues.
Direct Arylation of Silicon Nanocrystals with Hexadehydro‐Diels–Alder‐Derived Benzynes
Authors: Lai Ming , Zhang Ying , Zhao Liang , Huang Yu‐Hua , Zhang Lei , Fu Wenlong , Chen Pu , Wang Xu‐Dong , Zhu Tingshun , Yang Zhenyu 
Published: April 2023

AbstractColloidal silicon nanocrystals (SiNCs) have garnered significant interest in optoelectronics and biomedical applications. Direct arylation provides pathways to enhance the solution processability of particles and manipulate the photophysical and electronic properties of SiNCs. Unfortunately, existing methods employed to prepare aryl‐functionalized SiNCs are based on organometallic coupling or transition‐metal‐catalyzed strategies, which require metal‐based reagents for preactivation or the precursors and complicated post‐treatment processes for product purification. Herein, we demonstrate a metal‐free method that directly functionalizes SiNCs with aryl‐based ligands. We design a series of benzyne derivatives formed from the thermal cyclization of predesigned alkynes, allowing efficient arylation on hydride‐terminated silicon surfaces under mild conditions. These aryl‐functionalized SiNCs exhibit strong blue emissions with nanosecond‐scaled decay, suggesting the formation of a new radiative recombination channel on SiNC surfaces.
Yolk‐Shell Nanostars@Metal Organic Frameworks as Molecular Sieves for Optical Sensing and Catalysis
Authors: Zorlu Tolga , Becerril‐Castro I. Brian , Puertolas Begoña , Giannini Vincenzo , Correa‐Duarte Miguel A. , Alvarez‐Puebla Ramon A. 
Published: April 2023

AbstractHybrid composites between nanoparticles and metal organic frameworks (MOFs) have been described as optimal materials for a wide range of applications in optical sensing, drug delivery, pollutant removal or catalysis. These materials are usually core‐shell single‐ or multi‐nanoparticles, restricting the inorganic surface available for reaction. Here, we develop a method for the preparation of yolk‐shells consisting in a plasmonic gold nanostar coated with MOF. This configuration shows more colloidal stability, can sieve different molecules based on their size or charge, seems to show some interesting synergy with gold for their application in photocatalysis and present strong optical activity to be used as SERS sensors.
Effect of urea derivatives on the volume shrinkage during curing of cyanate ester and epoxy resins with polymeric hardener based on phenol‐amine salt
Authors: Ueyama Junji , Ogawa Ryo , Mori Yasuyuki , Furusho Yoshio , Tsuge Akihiko , Endo Takeshi 
Published: April 2023

AbstractEffect of urea derivatives (UDs) on volume shrinkage during the curing of bisphenol A diglycidyl ether (BAGE)/bisphenol E cyanate ester (DCBE)/thermal latent polymeric hardener based on phenol‐amine salt (PAH) was investigated. The UDs with NH bonds and bulky substituents reduced the volume shrinkage effectively. The UDs were just dispersed in the compositions before the curing, whereas the UDs dissolved in the cured compounds by the collapse of the dense packing of UDs based on hydrogen‐bonding interaction and/or π‐stacking after the curing. Besides, the curing behavior and the structure of cured materials were examined by DSC and IR. The results revealed that the UDs hardly affected the curing of the DCBE/BAGE/PAH system.
Infrared detectors enable spectacular infrared astronomy
Authors: Rieke George 
Published: April 2023

AbstractMajor advances in infrared astronomy have been enabled by new technologies‐from the first example of infrared astronomy using the vacuum thermocouple to the expansion of the field into the thermal infrared using the Ge:Ga bolometer. The introduction of high‐performance detector arrays had an even more profound influence through the James Webb Space Telescope: it is the rapid and exciting development of these arrays that built the case for this major investment in breakthrough astronomy. The arrays were developed in defense‐oriented aerospace firms, making the mechanisms for delivering them to astronomers eccentric. This article describes this formative era for infrared astronomy with arrays and how it led to the incredible devices now strutting their stuff on James Webb Space Telescope.
Impact of renal sinus protrusions on achieving trifecta in robot‐assisted partial nephrectomy
Authors: Hattori Yuto , Kambe Takanari , Mine Yuta , Hagimoto Hiroki , Kokubun Hidetoshi , Abe Yohei , Yamashita Daisuke , Tsutsumi Naofumi , Arizono Shigeki , Yamasaki Toshinari , Kawakita Mutsushi 
Published: April 2023

AbstractObjectiveThe objective of this work is to assess the relationship between the morphological characteristics of a central tumour and the perioperative outcomes of robot‐assisted partial nephrectomy (RAPN).Subjects and MethodsWe retrospectively analysed the data from 186 patients with central tumours involving the renal sinus, who underwent RAPN in a single‐centre study between February 2015 and June 2022. All cases were assigned a RENAL nephrometry score based on preoperative images. The shape of the protruding portion of the tumour was classified into four types: ‘flat’, ‘spherical’, ‘single‐hump’, and ‘complex‐hump’, and was independently assessed by two readers. The trifecta is defined as the warm ischemia time within 25 min, negative surgical margins, and no major postoperative complications. Univariate and multivariate analyses were performed to identify the factors associated with the failing trifecta.ResultsTrifecta was achieved in 113 cases (60.8%), and the achievement rate in flat, spherical, single‐hump, and complex‐hump types was 83.3%, 74.5%, 64.3%, and 21.3%, respectively. Prolonged warm ischemia time was the primary cause of the failure to achieve the trifecta. The rate of positive surgical margins and upstage to pathological T3a was greater for complex humps while the rate of major complications and postoperative GFR preservation did not differ between shapes. On multivariate analysis for failing trifecta achievement, the complex‐hump protrusion was found to be an independent positive predictor (odds ratio: 15.8; p < 0.001), whereas the height and width of protrusion were not significantly related.ConclusionsThe degree of difficulty varied among central tumours, and it was not possible to precisely measure it with existing scoring systems. Complex‐hump protrusions strongly correlate with failure to achieve the trifecta. Preoperative assessment of the morphology of protrusion is useful for predicting outcomes.
Ferritin‐based drug delivery system for tumor therapy
Authors: Tu Zaiqian , Timashev Peter , Chen Junge , Liang Xing‐Jie 
Published: April 2023

AbstractFerritin has been widely used in drug delivery in recent years due to its unique spherical nanocage structure. In addition, the natural targeting and good biocompatibility of ferritin make it an excellent drug delivery system. Therefore, ferritin has shown a broad application prospect in the field of nanomedicine. In this perspective, we will describe ferritin‐based drug delivery system, ferritin‐based drug delivery system for tumor treatment, and future challenges in ferritin development. Hopefully, this perspective may inspire the future development of ferritin‐based drug delivery systems for tumor treatment.
Self‐Assembly of Hybrid Peptide−DNA Nanostructures using Homotrimeric Coiled‐Coil/Nucleic Acid Building Blocks
Authors: Buchberger Alex , Al‐Amin Md , Simmons Chad R. , Stephanopoulos Nicholas 
Published: April 2023

AbstractPeptides and DNA are two of the most commonly used self‐assembling biological molecules for the construction of nanomaterials. However, there are only a few examples that combine these two self‐assembly motifs as key structural elements in a nanostructure. We report on the synthesis of a peptide−DNA conjugate that self‐assembles into a stable homotrimer based on the coiled‐coil motif. The hybrid peptide−DNA trimer was then used as a novel three‐way junction to link together either small DNA tile nanostructures, or to close up a triangular wireframe DNA structure. The resulting nanostructures were characterized by atomic force microscopy, and compared with a scrambled, non‐assembling peptide as a control. These hybrid nanostructures enable the integration of peptide motifs and potentially bio‐functionality with DNA nanostructures, and open the door to novel nano‐materials that have the advantages of both molecules.
Fluorinated Zirconia Prepared by Anionic Exchange of Zirconium Oxo/Hydroxide with Trifluoroacetic Acid: Structure, Acid‐Base and Catalytic Properties
Authors: Ben Salem Roua , Cornier Thibaut , Bargiela Pascal , Lebeau Bénédicte , Mishra Shashank , Essayem Nadine 
Published: April 2023

AbstractFluorinated zirconia were prepared by anionic exchange between commercial zirconium oxo/hydroxide of high surface area and trifluoracetic acid solutions. The new fluoride‐based catalysts contained high amount of F with superficial Zr/F ratio of 0.9 and 1.2 after calcination at 300 °C and 400 °C, respectively, and retained high surface areas. The impact of F insertion on the catalyst's acid‐base properties was studied by calorimetry of NH3 and CO2 adsorption and FTIR of pyridine adsorption. The insertion of F species was shown to inhibit the basicity of zirconia and to generate Brønsted acidity ascribed to the electron withdrawing of Fluorine. This is consistent with the selectivity changes observed in the gas phase isopropanol conversion leading to formation of propene at the expense of acetone over zirconia and selective aqueous phase dihydroxyacetone conversion into pyruvaldehyde with reduced formation of hexoses and Lactic acid upon F loading within zirconia framework. Fluorine atoms also made the catalyst's surface more hydrophobic.
Pt Single Atoms as Co‐Catalysts on CdS‐Sensitized Single‐Crystalline TiO2 Nanoflakes for Enhanced Visible Light Photocatalytic H2 Generation
Authors: Raza Waseem , Tesler Alexander B. , Mazare Anca , Tomanec Ondrej , Kment Stepan , Schmuki Patrik 
Published: April 2023

AbstractStudies on single‐atom catalysts (SACs) with individually isolated metal atoms anchored on specific supports have gained great interest in photocatalysis due to their enhanced catalytic activity and optimal atom utilization. By providing an optimized number of active sites and enhancing their intrinsic activity, SACs afford a distinctive platform for photocatalysis at the atomic level. In this study, we investigate the photocatalytic H2 generation of Pt single atoms (SAs) anchored on CdS‐sensitized single crystalline anatase TiO2 nanoflakes (ATNF) in the visible spectral range. Vertically‐aligned ATNF were synthesized on fluorine‐doped tin oxide substrates by a hydrothermal process, which were further sensitized by CdS nanoislands (NIs) using the successive ionic layer adsorption and reaction (SILAR) technique. Finally, a reactive‐deposition approach was used to successfully anchor Pt SAs on CdS‐sensitized ATNF. Under optimized conditions, the highest photocatalytic H2 evolution on Pt‐anchored single atom CdS sensitized ATNF was 17.8 μL h−1 under visible light illumination, which is 15.8, 7.5, and 6.7‐fold higher than bare CdS/FTO, PtSA/CdS/FTO, and ATNF, respectively. Overall, the density of Pt SAs plays a vital role via strong trapping of the photogenerated electrons and significantly improves the efficiency of electron‐hole separation, making PtSA/ATNF efficient solar‐driven photocatalysts.
DEVELOPMENT OF AN ORTHOTROPIC COMPOSITE SLAB SYSTEM FOR ROAD BRIDGES
Authors: Stroetmann R. , Karge C. , Mansperger T. 
Published: April 2023

AbstractLarge increases in traffic loads led to extensive fatigue damage to existing orthotropic steel roadway slabs of bridges. Reinforced concrete bridges and conventional composite bridges are less susceptible to fatigue but considerably heavier. With the so‐called ortho‐composite‐slab (OC‐slab) a lightweight and robust construction is currently being developed as an alternative to existing construction methods. The basic ideas for the design are explained and an overview of the objectives of the AiF‐FOSTA research project P1265 [1] is given. An overview of the experimental test program is given in section 3.3 It is used to determine the load‐bearing and fatigue behavior of the OC‐slab with composite dowel strips. Detailed information on tests on dowel strips in longitudinal and transverse direction are presented in [9]. Furthermore, application examples in practice are shown in section 4.
INNOVATIVE NUMERICAL APPROACHES FOR STRAIN LIMITED DESIGN OF COMPOSITE BEAMS
Authors: Zhang Q. , Schäfer M. 
Published: April 2023

AbstractFor composite cross‐section in steel and concrete plastic bending resistance is often used. However, also for cross‐section of class 1 and 2 rotation capacity may be reduced, then strain‐limited or elastic resistance becomes important. The strain‐limited resistance refers to the design of concrete sections according to EN 1992‐1‐1, considering the material nonlinearity. For the numerical approaches, the conventional “finite fibre method” demands high programming and calculation efforts due to the vast amount of fibres to be computed. In this article, three alternative numerical approaches: the finite cell method, the integral strain method and the direct analytical method are introduced. These approaches reduce the number of elements compared to the fibre method. They take different levels of simplification, varies in application ranges, accuracy and calculation speed. For conventional composite beam and slim‐floor beam cross‐sections, an efficient alternative to the fibre method is presented by the alternates.
INTEGRAL BRIDGE WITH RS‐OVERPASS TECHNOLOGY – STEP INTO THE FUTURE OF STANDARD HIGHWAY OVERPASSES
Authors: Zanon R. , Rademacher D. , Seidl G. , Pak D. 
Published: April 2023

AbstractStarting from Germany, the VFT bridge girder technology (prefabricated composite beam) has spread in several European countries in the last decades as further development of the standard steel‐concrete composite solution. Its configuration fits perfectly to integral frame bridges built over existing infrastructure with the scope to minimize the traffic disturbance. In this paper a further development with the focus on cost efficiency in span ranges of 40‐55 m is proposed: the RS‐Overpass technology. The change consists in using standard rolled sections by adapting them into the integral frame bridge configuration, further enhancing the structural efficiency with the benefits of high‐steel strength. The constructive details to achieve the polygonal form have been studied to allow easy fabrication and a maximal clearance height over highway traffic lanes. The RS‐Overpass solution is conceived as the economic option of standard highway overpasses, with the aim of a overall construction cost reduction of 5%. The possibility of weathering steel or hot‐dip galvanization create the unique offer for a maintenance‐free solution.
Kunming tower: composite systems in supertall design
Authors: Li Xuemei , Chhabra Ashpica , Ding Han 
Published: April 2023

AbstractFor the past 20 years, composite systems have dominated supertall construction. This paper will present composite construction solutions at system and component level in the design of supertall buildings using the example of the 407m tall Kunming Tower. The tower utilizes an innovative tied‐braced frame structural system at the perimeter and strategically placed energy dissipating mechanisms to meet the Chinese code requirements and to achieve seismic performance objectives. Given the complexity of the non‐prescriptive structure, many advanced analyses were performed to verify building behavior and optimize the structural system.
Institutional and technical history of requirements‐based strategic armor ceramics basic research leading up to the multiscale material by design materials in extreme dynamic environments (MEDE) program. Part I. Brief history of institutional changes and relevant major research programs
Authors: McCauley James W. 
Published: April 2023

AbstractHistory, beginning in the late 1960s during the Vietnam war, of the institutional changes that took place because of various military operations and the resulting changes in policies and requirements in the Department of Defense and the Army: Army Force XXI, DDRE, and Army After Next; this will include the evolution of personnel and vehicle protection materials and the impact of major DARPA programs. The new requirements emphasized light weight and changes in the basic research approach, which led to the approval of a strategic research objective, “Armor Materials by Design.” At the same time, there were other National planning activities, workshops, and conferences advocating for the armor materials by design vision and the use of “figures of merit.” The Army Research Laboratory responded to these initiatives by initiating an “Enterprise for Multiscale Research of Materials” leading to the funding of a revolutionary new collaborative research program on “materials in extreme dynamic environment.” The role of the ARL Materials Center of Excellence will also be included.