bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessment of Left Ventricular Myocardial Systolic Acceleration in Diabetic Rats Using Velocity Vector Imaging
Authors: Zhang Haibin , Wei Zhangrui , Zhu Xiaoxing , Li Hongling , Yu Ming , Duan Yunyan , Zhu Ting , Zhang Jun , Zhou Xiaodong , Zhu Miaozhang 
Published: April 2014

ObjectivesThe purpose of this study was to investigate how the myocardial acceleration during isovolumic contraction changed in rats with diabetic cardiomyopathy and a normal left ventricular ejection fraction (LVEF) by using velocity vector imaging.MethodsVelocity vector imaging was performed in 12 control rats and 15 rats with streptozotocin‐induced diabetic cardiomyopathy 12 weeks after streptozotocin injection. The segmental radial displacement, velocity, acceleration, and percent wall thickening were measured at the mid–left ventricular (LV) level.ResultsCompared to control rats, rats with cardiomyopathy had a significant decrease in the peak radial acceleration during isovolumic contraction in most segments of the LV wall (including the anterior, anterolateral, inferolateral, and inferior segments; P < .05) but a similar LVEF, fractional shortening, and segmental displacement. Rats with cardiomyopathy also had a significant increase in LV end‐diastolic and end‐systolic diameters when corrected for body mass (P < .001; P = .003, respectively) and a significant decrease in the radial peak systolic velocities of the inferolateral and inferior wall segments (P < .05). In addition, rats with cardiomyopathy had a significant decrease in the peak radial diastolic acceleration in most segments of the LV wall (except for the anterolateral one; P< .05) but similar peak radial diastolic velocities in all LV wall segments compared to controls. Pathologic examination in rats with cardiomyopathy revealed ultrastructural impairment of the capillary and cardiocyte without any atherosclerotic lesion in the coronary artery compared to control rats.ConclusionsMyocardial acceleration during isovolumic contraction decreases in rats with diabetic cardiomyopathy and a preserved LVEF, suggesting the presence of regional LV systolic dysfunction.
Self-Managed Abortion Attempts Before vs After Changes in Federal Abortion Protections in the US
Authors: Ralph Lauren , Schroeder Rosalyn , Kaller Shelly , Grossman Daniel , Biggs M. Antonia 
Published: July 2024

ImportanceWith decreasing access to facility-based abortion in the US, an increase in self-managed abortion (SMA) using various methods is anticipated. To date, no studies have examined changes in SMA in the shifting policy landscape.ObjectiveTo estimate changes in SMA prevalence among the general US population from before to after the Supreme Court’s June 2022 decision overturning federal abortion protections.Design, Setting, and ParticipantsSerial cross-sectional surveys were administered throughout the US from December 10, 2021, to January 11, 2022, and June 14 to July 7, 2023. Participants included online panel members assigned female sex at birth, ages 18 to 49 years (or ages 15-17 years if a household member), who were English- or Spanish-speaking.ExposureYear of the survey (2021-2022 vs 2023).Main Outcome and MeasuresParticipants were asked whether they had “ever taken or done something on their own, without medical assistance, to try to end a pregnancy” and, if so, details of their experience. Changes in the weighted SMA prevalence between survey years were examined, factors associated with SMA experience were identified, and projected lifetime SMA prevalence was calculated using discrete-time event history models, accounting for abortion underreporting.ResultsMedian age of the participants was 32.5 (IQR, 25-41) years in 2021-2022 (n = 7016) and 32.0 (IQR, 24-40) in 2023 (n = 7148). Across both years, approximately 14% were non-Hispanic Black, 21% were Hispanic, and 54% were non-Hispanic White. The weighted adjusted proportion that ever attempted SMA was 2.4% (95% CI, 1.9%-3.0%) in 2021-2022 and 3.4% (95% CI, 2.8%-4.0%) in 2023—an increase of 1.0% (95% CI, 0.2%-1.7%; P = .03). Projected lifetime SMA prevalence accounting for abortion underreporting was 10.7% (95% CI, 8.6%-12.8%). In adjusted analyses, SMA experience was higher among non-Hispanic Black (4.3%; 95% CI, 2.8%-5.8%) vs other racial and ethnic (2.7%; 95% CI, 2.2%-3.1%) groups (P = .04) and sexual and gender minority (5.0%; 95% CI, 3.4%-6.6%) vs heterosexual or cisgender (2.5%; 95% CI, 2.0%-2.9%) participants (P &amp;lt; .001). Approximately 4 in 10 (45.3% in 2021 and 39.0% in 2023) SMA attempts occurred before age 20 years. The methods used included herbs (29.8% [2021-2022] vs 25.9% [2023]), physical methods (28.6% [2021-2022] vs 29.7% [2023]), or alcohol or other substances (17.9% [2021-2022] vs 18.6% [2023]). Few participants (7.1% [2021-2022] vs 4.7% [2023]) sought emergency care for a complication.Conclusions and RelevanceIn this serial nationally representative survey study, increased SMA was observed following the loss of federal abortion protections. The findings revealed increased SMA use among marginalized groups, most often with ineffective methods. These findings suggest the need to expand access to alternative models of safe and effective abortion care and ensure those seeking health care post-SMA do not face legal risks.
Regulation of Dihedral Angle on Molecular Engineering for Enhancing Triboelectric Performance
Authors: Zhou Siqian , Tao Xinglin , Liu Zhaoqi , Wu Han , Guan Zhengxin , Liu Liqiang , Li Jun , Chen Xiangyu , Ou‐Yang Wei 
Published: July 2024

AbstractThe performance of triboelectric polymers relies on their molecular structure. Therefore, investigating how to construct high‐performance molecular structures of triboelectric polymers becomes imperative, yet the relationship between microscopic structural parameters and triboelectric performance remains unclear. In this study, the relationship is studied between dihedral angles of adjacent conjugated planes and triboelectric performance. Various polyimide monomers are synthesized to manipulate the conjugated dihedral angles within the molecular chains. Introducing larger dihedral angles in polyimides (PIs) reduces the conjugation between molecular chains, suppressing the formation of charge transfer complexes (CTCs), and widening the energy gap between molecular orbitals. With the increase in dihedral angles, the output performance improved by 100%. The surface charge density of 335 µC·m−2 is achieved through the synergistic effect of the high charge retention capability of the PI film and the high triboelectric properties of the corona‐polarized fluorinated ethylene propylene (FEP). A large dihedral angle can form numerous deep traps and effectively prevent charge escaping while ensuring stable output. This study provides a feasible strategy for investigating the construction of high triboelectric performance molecular structures, enriching the understanding of how molecular structures influence the triboelectric properties of polymer materials and promote high‐performance fluorine‐free and environmentally friendly polymers.
On the Emergence of Ferromagnetism in LaCoO3 Ultrathin Films
Authors: Li Yan , Zhou Hua , Liu Yang , Tung I‐Cheng , Yan Xi , Wrobel Friederike , Wang Huan‐Hua , Welp Ulrich , Hong Hawoong , Freeland John W. , Fong Dillon D. 
Published: July 2024

AbstractIt is well known that the properties of a crystal evolve as it increases in size from a single atomic plane to that of the bulk. Such size‐dependent transitions can stem from many different origins and depend on minute changes to crystal bonding and composition. A model example is that of LaCoO3, which is non‐magnetic in the bulk but can display ferromagnetism at the nanoscale. Here, the evolution of structure‐property relationships is studied in the LaCoO3−δ/SrTiO3 (001) system as the thickness of LaCoO3−δ is increased from a single plane to 10 unit cells. In situ synchrotron X‐ray studies are performed during and post‐deposition to probe changes in the interactions between structure, stoichiometry, and magnetic behavior. Structural quantification indicates that the oxygen octahedral rotation pattern evolves with thickness, due to inherent differences in crystal symmetry between the film and substrate. The change in rotation modifies the required energy barrier for the spin state transition via the Co–O bond length and Co–O–Co bond angle, affecting the appearance of ferromagnetism. Our results highlight the contributions of high spin Co2+ and/or high spin Co3+ to respective weak and robust ferromagnetism and the evolution of properties with size in ultrathin LaCoO3−δ heterostructures.
Optoelectronic Neuromorphic Logic Memory Device Based on Ga2O3/MoS2 Van der Waals Heterostructure with High Rectification and On/Off Ratios
Authors: Zhang Yao , Liu Wei , Liu Kai , Wang Runzhi , Yu Jiaqi , Liu Zeyu , Gao Junjie , Liu Yujia , Zhang Yingli , Xu Hua , Gan Xuetao 
Published: July 2024

AbstractIt is crucial to develop advanced optoelectronic devices that incorporate multiple functions, including sensing, storage, and computing, which is considered at the forefront of semiconductor optoelectronics to meet emerging functional diversification. In this study, by stacking the n‐type Ga2O3 with the n‐type MoS2 flakes, a Ga2O3/MoS2 heterostructure optoelectronic device with high rectification ratio of ≈105 and on/off ratio of ≈108 is fabricated, which achieves high detectivity of 1.34 × 109 Jones and high responsivity of 28.92 mA/W. More importantly, the Ga2O3/MoS2 heterostructure device shows potential ability to integrate sensing and memorizing, simultaneously, which can be used as artificial neuromorphic synaptic. The device exhibits excellent photo‐induced synaptic functions including short‐term plasticity, long‐term plasticity, and paired‐pulse facilitation, realizing the ability to couple light and electrical signals by Pavlovian associative learning. At last, the device also demonstrates the information processing ability to act as optoelectronic logic gate AND by synergistically regulating the light on/off states and gate voltage. The research introduces an innovative strategy for the development of next‐generation optoelectronic devices which are highly integrated with sensing, memory, and logic processing functions, demonstrating great application prospects in constructing an efficient artificial neuromorphic visual and logic systems.
Polar Alternating Cations Intercalated Hybrid Perovskite with Iodine‐Substituted Spacers Toward Efficient Passive X‐Ray Detection
Authors: Zhu Zeng‐Kui , Wu Jianbo , Yu Panpan , Zeng Ying , Li Ruiqing , Guan Qianwen , Dai Hongliang , Chen Guirong , Yang Huawei , Liu Xitao , Li Lina , Ji Chengmin , Luo Junhua 
Published: July 2024

Abstract2D hybrid perovskites, with their high X‐ray absorption and extended carrier transport, present excellent promise for efficient direct X‐ray detection. However, most of the current devices require external bias voltage, which results in the need for significant energy consumption and severe ion migration, therefore, it is urgent to develop new types of materials for achieving efficient passive X‐ray detection. Herein, two novel chiral polar alternating cations intercalation (ACI)‐type hybrid perovskite materials, named (R/S‐PPA)(IEA)PbBr4 (1‐R/S, (R/S)‐PPA = R/S‐1‐phenylpropylamine; IEA = iodoethylamine), are constructed by integrating the chiral aromatic spacer R/S‐PPA and the iodine‐substituted spacer IEA. Various intermolecular interactions, such as I···I, C─H···I, π···π interactions, are introduced due to the introduction of I‐substituted chain amines, which effectively suppresses ion migration and thus lead to improved operational stability. The device constructed along the polar axis displays superior X‐ray detection performance, such as relatively high sensitivity and an ultra‐low limit of detection (LoD) of 3.0 nGy s−1, making it the first chiral ACI‐type perovskite material for realizing efficient passive X‐ray detection. Furthermore, 1‐R also presents low dark current drift and exceptional irradiation stability. This work provides new thought for using novel ACI‐type polar perovskite for high‐performance passive direct X‐ray detection.
Single‐Atom Catalyst Induced Amorphous Li2O2 Layer Enduring Lithium–Oxygen Batteries with High Capacity
Authors: Mohamed Zeinab , Zhou Quan , Zhu Kefu , Zhang Guoliang , Xu Wenjie , Chimtali Peter Joseph , Cao Yuyang , Xu HanChen , Yan Ziwei , Wang Yixiu , Akhtar Hassan , Al‐Mahgari Aad , Wu Xiaojun , Wang Changda , Song Li 
Published: July 2024

AbstractAprotic lithium–oxygen batteries (LOBs) may deliver exceptionally high energy density but struggle to attain rapid reversibility and substantial capacity simultaneously, due to typical surface or solution‐formed insulating solid Li2O2. Tuning the structure of Li2O2 to create a large‐area amorphous layer on the cathode is predicted to overcome the multiperformance limitations. Here, an isolated nickel single atom to nitrogen‐doped graphene as a cathode catalyst (Ni─NG SAC) for LOBs is presented via a green click‐trapping strategy. Derived from the maximized exposure of atomic active sites of the cathode, the formation/decomposition mechanisms of Li2O2 are tailored, and a large area of thin Li2O2 amorphous film is achieved. The structure and functions of Ni─NG SAC are explored by theoretical computation and synchrotron radiational investigation. Consequently, the abundant Ni─N4 sites enhance redox kinetics and stand out to deliver an impressive specific discharge/charge capacity of 24 248/17 656 mAh g−1 at 200 mA g−1, together with a long cycle life of over 500 cycles. This study contributes helpful insights to achieve high‐capacity LOBs with long lifespans, by constructing unique single‐atom catalysts to optimize the formation of amorphous discharge Li2O2 products.
Physicochemically Interlocked Selenium for High Performing Aqueous Zinc–Selenium Batteries
Authors: Anjan Apurva , Mahato Manmatha , Bhimani Kevin , Kushwaha Anoop K. , Mahajani Varad , Yoo Hyunjoon , Panchal Reena A. , Manoj Rohit M. , Ha Jawon , Nayak Saroj K. , Keblinkski Pawel , Oh Il‐Kwon , Koratkar Nikhil 
Published: July 2024

AbstractA conversion‐chemistry‐based zinc–selenium aqueous battery is reported that delivers high specific capacity, good rate capability, and excellent cycle life. In this work, an electronically conjugated covalent triazine framework is used to physicochemically lock selenium (Se8) clusters. As a control sample, the traditional melt‐diffusion approach is used to physically lock Se8. While the melt‐diffused selenium cathode exhibited a precipitous drop in capacity with cycling, the physicochemically locked selenium cathode can be cycled in a stable manner and delivered a specific capacity of ≈600 mAh g−1 with a capacity retention of ≈70% after 1000 continuous charge/discharge steps. Ab initio density functional theory calculations and various structural and morphological characterizations indicate that the superiority of the physicochemically locked selenium cathode stems from its ability to suppress the polyselenide shuttle phenomenon and thus prevent loss of active material during cycling. This work opens the door toward the development of conversion chemistries for high performing, non‐flammable, and low‐cost zinc‐based rechargeable batteries.
Controlled Chemical‐Patterning of Textile to Accelerate Anti‐Gravity Water Flow
Authors: Kumar Saurav , Borbora Angana , Chakraborty Pritha , Sarma Hrisikesh , Bandyopadhyay Ashutosh , Bose Akash , Mandal Biman B. , Tenjimbayashi Mizuki , Manna Uttam 
Published: July 2024

AbstractBio‐inspired unidirectional flow of tiny aqueous droplets across the fibrous substrate paved the way for the emergence of various advanced materials. In the past, textiles decorated with noncontact‐based wettability‐patterns enabled unidirectional water flow—without flooding the top surface by the transferred water. However, such approaches mostly suffer from a low (≈0.176 µL mm−2 s−1) flow rate and are likely to delay the overall liquid ejection process. Here, a chemically reactive coating capable of tailoring water wettability (121.3° ± 2.4° to 153.3° ± 1.8°) is introduced on commercially available textiles to develop chemically modulated wettability‐pattern for achieving a rapid (2.57 ± 0.28 µL mm−2 s−1) flow rate of water against the gravity with an ability to roll the accumulated liquids on the top surface. The spatially selected and controlled chemical modification with hydrophilic and hydrophobic small molecules through a 1, 4‐conjugate addition reaction yielded a 3D channel with a customized wettability gradient. The pinning and depinning of invaded water through such chemically decorated channels enabled unidirectional and fast penetration of liquid, where the water penetration resistance largely depends on the water penetration direction and dimension of the chemically modulated channels.
Edge‐Effect Modulated Noble Metal Electrocatalysts for Efficient and pH‐Universal Hydrogen Evolution Reaction
Authors: Li Qiqi , Deng Zhuo , Tao Dingfeng , Pan Jinyue , Xu Wenli , Zhang Zhixuan , Zhong Hongwei , Gao Yinhong , Shang Qing , Ni Yongqiang , Li Xuanke , Chen Yongting , Zhang Qin 
Published: July 2024

AbstractThe catalytic activity of metal nanoparticles is closely pertinent to the substrate, while the influence of the support on the catalytic activity is acquainted scarcely. Herein, the edge selective decoration of noble metal nanoparticles into an edge‐rich carbon foam (CF) matrix for efficient pH‐universal hydrogen evolution (HER) reaction is reported. The highly localized density of states of the graphene edges enables increased reactivity to noble metal nanoparticles and tunes their electronic states. As expected, the Pt nanoparticles decorated on CF (Pt NPs@CF) exhibit low overpotentials (η10) of only 35, 49, and 53 mV under acidic, alkaline, and neutral conditions, respectively. Moreover, it can deliver the ampere‐level current density of 1000 mA cm−2 with an overpotential of 97 mV in acidic solutions. Above all, the other noble metal NPs decorated on CF also possess efficient pH‐universal HER performance. This work presents a new avenue for developing high‐activity electrocatalysts via support engineering.
Developing Cathode Films for Practical All‐Solid‐State Lithium‐Sulfur Batteries
Authors: Ye Chao , Xu Shijie , Li Huan , Shan Jieqiong , Qiao Shi‐Zhang 
Published: July 2024

AbstractThe development of all‐solid‐state lithium‐sulfur batteries (ASSLSBs) toward large‐scale electrochemical energy storage is driven by the higher specific energies and lower cost in comparison with the state‐of‐the‐art Li‐ion batteries. Yet, insufficient mechanistic understanding and quantitative parameters of the key components in sulfur‐based cathode hinders the advancement of the ASSLSB technologies. This review offers a comprehensive analysis of electrode parameters, including specific capacity, voltage, S mass loading and S content toward establishing the specific energy (Wh kg−1) and energy density (Wh L−1) of the ASSLSBs. Additionally, this work critically evaluates the progress in enhancing lithium ion and electron percolation and mitigating electrochemical‐mechanical degradation in sulfur‐based cathodes. Last, a critical outlook on potential future research directions is provided to guide the rational design of high‐performance sulfur‐based cathodes toward practical ASSLSBs.
Data sharing as the foundation of discovery: ADNI and breakthroughs in Alzheimer's disease
Authors: Travaglia Alessio , Hoffmann Steve 
Published: July 2024

AbstractThe COVID pandemic has shown that when the research community comes together, we can conquer the most complex biomedical challenges. Collaboration and teamwork among federal agencies, private organizations, and researchers have been crucial in the development of vaccines and therapeutics against COVID.Possibly the first example of such cross‐functional collaboration is the Alzheimer's Disease Neuroimaging Initiative (ADNI), the largest and longest continually monitored Alzheimer's study. ADNI was designed and operated as a public‐private partnership, managed by the Foundation for the National Institutes of Health.This article shows how recent successes in the Alzheimer's field are directly a result of ADNI's open and transparent sharing of knowledge, expertise, and resources, which have allowed researchers to advance their understanding of Alzheimer's and tackle challenges in a relatively short period of time. ADNI's approach to open‐source innovation also served as a model for addressing other complex diseases and led to numerous collaborative research initiatives.Highlights
The Alzheimer's Disease Neuroimaging Initiative (ADNI) was designed, structured, and operated as a public‐private partnership, managed by the Foundation for the National Institutes of Health.
The recent successes in the Alzheimer's field are directly a result of ADNI's efforts.
Open and transparent sharing of knowledge, expertise, and resources allowed researchers to advance their understanding of Alzheimer's and tackle challenges in a relatively short period of time.
A Paramagnetic Nickel–Zinc Hydride Complex
Authors: Perez‐Jimenez Marina , Geoghegan Blaise L. , Collauto Alberto , Röβler Maxie M. , Crimmin Mark R. 
Published: July 2024

AbstractReaction of a molecular zinc–hydride [{(ArNCMe)2CH}ZnH] (Ar=2,6‐di‐isopropylphenyl) with 0.5 equiv. of [Ni(CO)Cp]2 led to the isolation of a nickel–zinc hydride complex containing a bridging 3‐centre,2‐electron Ni−H−Zn interaction. This species has been characterized in the solid‐state by single crystal X‐ray diffraction. DFT calculations are consistent with its formulation as a σ‐complex derived from coordination of the zinc–hydride to a paramagnetic nickel(I) fragment. Continuous‐wave and pulse EPR experiments suggest that this species is labile in solution. Further experiments show that in the presence of catalytic quantities of nickel(I) precursors, zinc–hydride bonds can undergo either H/D‐exchange with D2 or dehydrocoupling to form Zn−Zn bonds. In combination, the data support the activation and functionalisation of zinc–hydride bonds at nickel(I) centres.
Precisely Constructing Molecular Junctions in Hydrogen‐Bonded Organic Frameworks for Efficient Artificial Photosynthetic CO2 Reduction
Authors: Zhang Yaqin , Li Ping , Cui Peng , Hu Xunliang , Shu Chang , Sun Ruixue , Peng Mengjie , Tan Bien , Wang Xiaoyan 
Published: July 2024

AbstractThe development of artificial photocatalysts to convert CO2 into renewable fuels and H2O into O2 is a complex and crucial task in the field of photosynthesis research. The current challenge is to enhance photogenerated charge separation, as well as to increase the oxidation capability of materials. Herein, a molecular junction‐type porphyrin‐based crystalline photocatalyst (Ni‐TCPP‐TPyP) was successfully self‐assembled by incorporating a nickel porphyrin complex as a reduction site and pyridyl porphyrin as an oxidation site via hydrogen bonding and π–π stacking interactions. The resulting material has a highly crystalline structure, and the formation of inherent molecular junctions can accelerate photogenerated charge separation and transport. Thus, Ni‐TCPP‐TPyP achieved an excellent CO production rate of 309.3 μmol g−1 h−1 (selectivity, ~100 %) without the use of any sacrificial agents, which is more than ten times greater than that of single‐component photocatalyst (Ni‐TCPP) and greater than that of the most organic photocatalysts. The structure‐function relationship was investigated by femtosecond transient absorption spectroscopy and density functional theory calculations. Our work provides new insight for designing efficient artificial photocatalysts, paving the way for the development of clean and renewable fuels through the conversion of CO2 using solar energy.