bluuebunny/crossref_metadata_2025_split huggingface dataset:
Molybdenum disulfide of modified in situ as a nanofiller for enhanced mechanical properties and thermal properties of polypropylene composites
Authors: Dong Haipeng , Liu Minghui , Li Hongliang , Wu Jinhui , Wu Zenan , Zhu Baikang , Zhang Lu , Hengcong Tao 
Published: November 2022

AbstractFew‐layer molybdenum disulfide (MoS2) was prepared by liquid phase exfoliation with in‐situ modification as a nanofiller for polypropylene (PP). Scanning and transmission electron microscopies (SEM, TEM) showed uniform dispersion and excellent adhesion of MoS2 within the PP matrix. When MoS2 was centrifuged at 1000 rpm, the mechanical properties of the composite were greatly improved by adding only 0.5 wt.% of MoS2. The yield strength, bending modulus, and impact strength increased by 2.3%, 8.9%, and 44.03%, respectively. X‐ray diffraction (XRD) and differential scanning calorimetry (DSC) showed that the enhanced mechanical properties of the composites were related to PP crystallographic transformation. Thermogravimetric analysis (TGA) showed that the incorporation of 2 wt.% MoS2 increased the maximum weight‐loss temperature of the composites by approximately 30°C. The mechanisms for increasing thermal stability have been thoroughly demonstrated by band energy analysis. MoS2 nanosheets have high aspect ratios and strong insulation with a change in band gap width compared to bulk MoS2, which is resulting in the stronger interactions at the MoS2/PP substrate interface. Furthermore, due to the outstanding carrier for rigid and thermally stable materials, MoS2 composites displayed excellent mechanical and thermal properties. In addition, unlike PP, the melt flow rate (MFR) of composite materials is more conducive to downstream product processing. This will further promote the application scope of MoS2/PP composites.
Ecological legacies of past fire and human activity in a Panamanian forest
Authors: McMichael Crystal N. H. , Vink Veerle , Heijink Britte M. , Witteveen Nina H. , Piperno Dolores R. , Gosling William D. , Bush Mark B. 
Published: November 2022

Societal Impact StatementTropical forests provide global ecosystem services and harbor much of Earth's terrestrial biodiversity, but the mechanisms driving the patterns of biodiversity remain uncertain. Palms are one of the most abundant and most widely used plant groups, particularly in the Neotropics. Our data highlight how both direct and indirect human influence that occurred decades to hundreds of years ago can affect the abundances of palm species in modern tropical forests. Our results highlight that biodiversity is dynamic, and changes through time, and that human activities can affect species composition for centuries in tropical forests.Summary

Human activities over the past decades and centuries, including fire, cultivation, and forest opening, may have left ecological legacies that persist in modern tropical forests, particularly among palms. We investigated whether past human activities affected modern palm abundances in a well‐studied plot located in a tropical semievergreen forest of Panama.
We analyzed soil cores for charcoal to reconstruct past fire events and phytoliths to reconstruct past vegetation changes. We dated as many charcoal fragments as possible to place a temporal framework on past fire events.
Our analysis documented widespread fires that occurred 600–900 years ago across the plot. Oenocarpus mapora increased in abundance as a result of these fires, though other palms did not. A subsequent increase in O. mapora occurred later in the relative absence of fire and was likely due to game hunting during the construction of the Panama Canal.
Our results showed that the enrichment of O. mapora was determined by disturbance characteristics (e.g., timing, type, and intensity), but the persistence of increased abundances was likely determined by traits (life history characteristics). These data highlight the complexity of human–environment interactions and how they can persist for centuries in settings with long‐lived trees such as tropical forests. These data highlight the importance of adding a historical context to further understand modern ecological patterns and processes.
Density functional theory study of the enhancement of quantum capacitance of graphene by phosphorous doping
Authors: Rani Babita , Bubanja Vladimir , Jindal Vijay K. 
Published: November 2022

AbstractCalculations based on density functional theory are performed to explore the effect of the phosphorus dopants and their oxygenation on the quantum capacitance of single‐ and double‐vacancy graphene in the voltage range from −1.5 to +1.5 V. It is found that these modified graphenes have improved quantum capacitance, and can store more charges compared to the pristine graphene. The findings can be used as a guidance for the rational design of P‐doped graphene as an electrode material of asymmetric supercapacitors with high energy density.
Feasibility of combining biosensor and ecological momentary assessment to measure stress experiences among economically disadvantaged adolescents
Authors: Murray Desiree W. , Ridenour Ty A. , Swingler Margaret M. , Morgan Anna , Hegarty‐Craver Meghan 
Published: November 2022

AbstractAdolescent stress is complex and impairing. Novel measures are needed to understand stress variability within individuals over time from a physiological as well as a subjective perspective. To test the feasibility of combining ecological momentary assessment (EMA) and wearable biosensors to assess adolescent stress, using an idiographic approach with experience sampling methods. A small sample (n = 23) of predominantly African American, economically disadvantaged adolescents were asked to complete EMA surveys four times per day and wear an armband measuring Heart rate (HR) and skin response for a 2‐week period. Descriptive analyses examined number of hours of armband wear, percentage of viable data, and percentage of surveys completed by gender and race. Associations between biosensor data and EMA reports within and across individuals were also examined using hierarchical linear regression. EMA survey completion was good (81%) as was adherence to biosensor protocols, although technological difficulties interfered with collection of HR variability for youth with darker skin tones. Youth reported stressful events in 12.79% of EMA surveys, although 43% reported no negative mood experiences. Convergent validity was supported for detecting between‐person (EMA) and within‐person (EMA and biosensors) variability in stress across time, although associations across youth were highly variable. Results suggest value for biobehavioral methods in understanding day‐to‐day stress in adolescents but highlight variability in stress experiences as well as technological limitations, especially for youth of colour.
Hetero‐Polycrystalline Membranes with Narrow and Rigid Pores for Molecular Sieving
Authors: Li Wanbin , Su Pengcheng , Tang Huiyu , Lin Yanshan , Yu Yanqing 
Published: November 2022

AbstractMolecular sieving membranes have great potential for energy‐saving separations, but they suffer from permeability‐selectivity trade‐off limitation. In this report, simultaneous hetero‐crystallization and hetero‐linker coordination of metal–organic framework (MOF) hollow fiber membranes through one‐pot synthesis for precise gas separation is reported. It is found that the hetero‐polycrystalline membranes consist of 2D and 3D MOF phases and are defect‐free and roughly orientated, hetero‐linker exchange of 3D phase by larger geometric ones can narrow transport pathway, and framework rigidification occurs and thus fixes MOF channels. The prepared membranes are robust and reproducible, and exhibit substantially improved performance, with H2/CO2, H2/N2, and H2/CH4selectivities up to 361, 482, and 541, respectively, accompanied by high H2permeance over 1100 gas permeation units, which can easily outclass trade‐off upper bounds of state‐of‐the‐art membranes.
Multi‐Dimensional Molecular Self‐Assembly Strategy for the Construction of Two‐Dimensional Mesoporous Polydiaminopyridine and Carbon Materials
Authors: Zhang Liangliang , Liu Yumeng , Wang Tao , Liu Zhilin , Li Wei , Qiao Zhen‐An 
Published: November 2022

AbstractTwo‐dimensional (2D) mesoporous polymers, combining the advantages of organic polymers, porous materials, and 2D materials, have received great attention in adsorption, catalysis, and energy storage. However, the synthesis of 2D mesoporous polymers is not only challenged by the complex 2D structure construction, but also by the low yield and difficulty in controlling the dynamics of the assembly during the generation of mesopores. Herein, a facile multi‐dimensional molecular self‐assembly strategy is reported for the preparation of 2D mesoporous polydiaminopyridines (MPDAPs), which features tunable pore sizes (17–35 nm) and abundant N content up to 18.0 at%. Benefitting from the abundant N sites, 2D nanostructure, and uniform‐large mesopores, the 2D MPDAPs exhibit excellent catalytic performance for the Knoevenagel condensation reaction. After calcination under N2 atmosphere, the obtained 2D N‐doped mesoporous carbon (NMCs) with large and uniform pore sizes, high surface areas, abundant N content (up to 23.1%), and a high ratio of basic N species (57.0% pyridinic N and 35.9% pyrrolic N) can show an excellent CO2 uptake density (11.7 µmol m−2 at 273 K), higher than previously reported porous materials.
3D‐Printed Silicone Substrates as Highly Deformable Electrodes for Stretchable Li‐Ion Batteries
Authors: Praveen Sekar , Kim Taehyung , Jung Soon Phil , Lee Chang Woo 
Published: November 2022

AbstractStretchable energy storage devices receive a considerable attention at present due to their growing demand for powering wearable electronics. A vital component in stretchable energy storage devices is its electrode which should endure a large and repeated number of mechanical deformations during its prolonged use. It is crucial to develop a technology to fabricate highly deformable electrode in an easy and an economic manner. Here, the fabrication of stretchable electrode substrates using 3D‐printing technology is reported. The ink for fabricating it contains a mixture of sacrificial sugar particles and polydimethylsiloxane resin which solidifies upon thermal curing. The printed stretchable substrate attains a porous structure after leaching the sugar particles in water. The resulting printed porous stretchable substrates are then utilized as electrodes for Li‐ion batteries (LIBs) after loading them with electrode materials. The batteries with stretchable electrodes exhibit a decent electrochemical performance comparable to that of the conventional electrodes. The stretchable electrodes also exhibit a stable electrochemical performance under various mechanical deformations and even after several hundreds of stretch/release cycles. This work provides a feasible route for constructing LIBs with high stretchability and enhanced electrochemical performance thereby providing a platform for realizing stretchable batteries for next generation wearable electronics.
Highly Symmetric, Self‐Assembling 3D DNA Crystals with Cubic and Trigonal Lattices
Authors: Lu Brandon , Vecchioni Simon , Ohayon Yoel P. , Woloszyn Karol , Markus Tiffany , Mao Chengde , Seeman Nadrian C. , Canary James W. , Sha Ruojie 
Published: November 2022

AbstractThe rational design of nanoscopic DNA tiles has yielded highly ordered crystalline matter in 2D and 3D. The most well‐studied 3D tile is the DNA tensegrity triangle, which is known to self‐assemble into macroscopic crystals. However, contemporary rational design parameters for 3D DNA crystals nearly universally invoke integer numbers of DNA helical turns and Watson–Crick (WC) base pairs. In this study, 24‐bp edges are substituted into a previously 21‐bp (two helical turns of DNA) tensegrity triangle motif to explore whether such unconventional motif can self‐assemble into 3D crystals. The use of noncanonical base pairs in the sticky ends results in a cubic arrangement of tensegrity triangles with exceedingly high symmetry, assembling a lattice from winding helical axes and diamond‐like tessellation patterns. Reverting this motif to sticky ends with Watson–Crick pairs results in a trigonal hexagonal arrangement, replicating this diamond arrangement in a hexagonal context. These results showcase that the authors can generate unexpected, highly complex, pathways for materials design by testing modifications to 3D tiles without prior knowledge of the ensuing symmetry. This study expands the rational design toolbox for DNA nanotechnology; and it further illustrates the existence of yet‐unexplored arrangements of crystalline soft matter.
A General Strategy for the Synthesis of Hierarchically Ordered Metal–Organic Frameworks with Tunable Macro‐, Meso‐, and Micro‐Pores
Authors: Wang Chen , Zhang Heyao , Wang Yao , Wu Jie , Kirlikovali Kent O. , Li Peng , Zhou Yaming , Farha Omar K. 
Published: November 2022

AbstractHierarchically ordered porous materials with tailored and inter‐connected macro‐, meso‐, and micro‐pores would facilitate the heterogeneous adsorption and catalysis processes for a wide range of applications but remain a challenge for synthetic chemists. Here, a general and efficient strategy for the synthesis of inverse opal metal–organic frameworks (IO MOFs) with a tunable size of macro‐, meso‐, and micro‐pores is reported. The strategy is based on the step‐wise template formation, precursor infiltration, solvo‐thermal reaction, and chemical etching. As a proof of the general applicability of this strategy, a series of inverse opal zirconium‐based MOFs with intrinsic micro‐ and/or meso‐pores, including UiO‐66, MOF‐808, NU‐1200, NU‐1000 and PCN‐777, and tunable macropores (1 µm, 2 µm, 3 µm, 5 µm, and 10 µm), have been prepared with outstanding yields. These IO MOFs demonstrate significantly enhanced absorption rates and faster initial hydrolysis rates for organophosphorus (OPs) aggregates compared to those of the pristine MOFs. This work paves the way for the further development of hierarchically ordered MOFs for advanced applications.
Interface Metal Oxides Regulating Electronic State around Nickel Species for Efficient Alkaline Hydrogen Electrocatalysis
Authors: Ren Jin‐Tao , Wang Lei , Chen Lei , Song Xin‐Lian , Kong Qing‐Hui , Wang Hao‐Yu , Yuan Zhong‐Yong 
Published: November 2022

AbstractHeterogeneous electrocatalysis typically depends on the surface electronic states of active sites. Modulating the surface charge state of an electrocatalysts can be employed to improve performance. Among all the investigated materials, nickel (Ni)‐based catalysts are the only non‐noble‐metal‐based alternatives for both hydrogen oxidation and evolution reactions (HOR and HER) in alkaline electrolyte, while their activities should be further improved because of the unfavorable hydrogen adsorption behavior. Hereto, Ni with exceptional HOR electrocatalytic performance by changing the d‐band center by metal oxides interface coupling formed in situ is endowed. The resultant MoO2 coupled Ni heterostructures exhibit an apparent HOR activity, even approaching to that of commercial 20% Pt/C benchmark, but with better long‐term stability in alkaline electrolyte. An exceptional HER performance is also achieved by the Ni‐MoO2 heterostructures. The experiment results are rationalized by the theoretical calculations, which indicate that coupling MoO2 with Ni results in the downshift of d‐band center of Ni, and thus weakens hydrogen adsorption and benefits for hydroxyl adsorption. This concept is further proved by other metal oxides (e.g., CeO2, V2O3, WO3, Cr2O3)‐formed Ni‐based heterostructures to engineer efficient hydrogen electrocatalysts.
In‐Plane BO3 Configuration in P2 Layered Oxide Enables Outstanding Long Cycle Performance for Sodium Ion Batteries
Authors: Wang Xuan , Dong Xiping , Feng Xiaochen , Shi Qinhao , Wang Jing , Yin Xuemin , Zhang Jiujun , Zhao Yufeng 
Published: November 2022

AbstractP2‐phase layered cathode materials with distinguished electrochemical performance for sodium‐ion batteries have attracted extensive attention, but they face critical challenges of transition metal layer sliding and unfavorable formation of hydration phase upon cycling, thus showing inferior long cycle life. Herein, a new approach is reported to modulate the local structure of P2 material by constructing a state‐of‐the‐art in‐plane BO3 triangle configuration ((Na0.67Ni0.3Co0.1Mn0.6O1.94(BO3)0.02). Both are unveiled experimentally and theoretically that such a structure can serve as a robust pillar to hold up the entire structure, by inhibiting the H2O insertion upon Na (de)intercalation and preventing the structure from deformation, which significantly boost the long cycle capability of P2‐materials. Meanwhile, more Na ions in the architecture are enabled to site on the edge sharing octahedrons (Nae), thus benefiting the Na+ transportation. Consequently, the as produced material demonstrates an ultralow volume variation (1.8%), and an outstanding capacity retention of 80.1% after 1000 cycles at 2 C. This work sheds light on efficient architecture modulation of layered oxides through proper nonmetallic element doping.
Combination of the insulator‐based dielectrophoresis and hydrodynamic methods for separating bacteria smaller than 3 μm in bloodstream infection: Numerical simulation approach
Authors: Rizi Farideh Salimian , Talebi Shahram , Manshadi Mohammad K D , Mohammadi Mehdi 
Published: November 2022

AbstractBloodstream infections have a high mortality rate with >80,000 deaths per year in North America. The inability to detect pathogens quickly in the early stages of the infection causes high mortality. Such inability has led to a growing interest in developing a rapid, sensitive, and specific method for identifying these pathogens. The rapid detection of bloodstream infections requires the rapid and efficient separation of bacteria from the blood. But the problem is that the number of bacteria is much lower than other blood components. The blood culture step needs to be accomplished first for bacteria identification and antibiotic susceptibility testing. As the blood culture is time‐consuming, a method based on the insulator‐based has been presented that increases the number of bacteria by combining the blood culture method and increasing the concentration. In this model, the dielectrophoresis technique was utilized in a curved microchannel with a constriction for sorting three particle sizes including 9, 7–4 μm, as well as smaller than 3 μm. The results showed that the applied voltage and the channel dimensions affect separation efficiency. Suppose these values are properly selected (for example, a voltage of 110 V that was causing the maximum electric field of 200 V/cm). The proposed model can completely (100%) separate larger than 9 μm and smaller than 3 μm particles. The proposed model has simple geometry and is considered an appropriate technique for sorting all bacteria separation in bloodstream infection.
Lineage and hybridization effects on size potential in the Largemouth Bass complex
Authors: Lutz-Carrillo Dijar J. , Schlechte Warren , Norman Jake , Bennett Daniel L. 
Published: November 2022

Abstract

Objective
Introductions of Florida Bass Micropterus floridanus (FB) to Texas resulted in prevalent hybridization with Largemouth Bass M. salmoides (LB) and the creation of hybrid-dominated fisheries. However, little was known about the size potential of these hybrids relative to each other or relative to the parental taxa.

Methods
Sampling of these taxa and their hybrids in Texas (populations = 166; n = 8685) and genotyping at taxon-diagnostic microsatellite loci facilitated comparisons of allele and genotype frequencies among weight-classes.

Result
Results indicated that per capita, fish that were 100% FB were much more likely to attain moderate (≥3.63-kg) to large (≥5.9-kg) size than any other genotype in the species complex. Among hybrids, F1 genotypes were likely to reach moderate to large sizes at rates similar to hybrids with high levels of FB alleles; otherwise, the likelihood of reaching large size scaled positively with levels of FB alleles. Hybrids with &lt;50% FB alleles and fish that were 100% LB were almost non-existent in the moderate and large size-classes. A case study in Lake Fork (n = 510) provided similar results, although F1 genotypes were more likely to reach large size than any other hybrid.

Conclusion
These findings provide evidence for positive size-related heterosis in the F1 generation and suggest that absent heterotic effects, size potential in hybrids is driven by many small additive-effect loci.
ER‐DeepSORT: Pedestrian Multiobject Tracking with Enhanced Reidentification
Authors: Liu Haiying , Zheng Taiheng , Sun Fengqian , Wang Chaoping , Deng Lixia 
Published: November 2022

AbstractPedestrian multiobject tracking is the major research branch in the field of computer vision. In complicated scenarios with frequent scale changes and occlusion, the existing multiobject tracking methods based on detection have unsatisfactory tracking accuracy because of the low robustness of reidentification. This article proposed a multiobject tracking method to improve the reidentification module in YOLOv5‐DeepSORT at a more fine‐grained level. The feature extraction network for the Re‐ID part of this algorithm is built based on Res2Net and group convolution. This network's hierarchical connection structure effectively improved the network's ability to extract multiscale features, and at the same time increased the receptive field of each network layer. The PCB network structure with evenly divided feature maps is used in the output part of the backbone network to enhance the influence of local features on the overall network performance. Based on this, the reidentification model is trained on the public datasets Market‐1501 and DukeMTMC‐reID using triplet loss. ER‐DeepSORT is an algorithm that combined the improved reidentification module of this article into DeepSORT. This article compared ER‐DeepSORT with YOLOv5‐DeepSORT under the original reidentification module to evaluate the tracking effect in MOT16 test sequence, the experimental results showed that ER‐DeepSORT improved MOTA by 5.4% and MOTP by 2.2% on the Market‐1501 datasets, and improved MOTA by 9.6% and MOTP by 2.7% on the DukeMTMC‐reID datasets. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.