bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hongos micorrizógenos arbusculares y nutrimentos del suelo asociados a cuatro especies de helechos en dos ecosistemas de Oaxaca, México
Authors: Bautista-Cruz Ana A. , Montaño Noé M. , Camargo-Ricalde Sara L. , Pacheco Leticia 
Published: December 2014

La abundancia y riqueza de hongos micorrizógenos arbusculares (HMA), así como la micorriza arbuscular (MA) en las raíces de cuatro especies de helechos (Cheilanthes myriophylla, Ch. bonariensis, Blechnum appendiculatum y Adiantum capillus-veneris) se evaluaron en relación con la fertilidad del suelo durante febrero y diciembre. Los helechos se evaluaron en dos ecosistemas de Oaxaca, México: Ch. myriophylla y Ch. bonariensis en el matorral xerófilo semiárido, y B. appendiculatum y A. capillus-veneris en el bosque mesófilo de montaña. El suelo rizosférico de las cuatro especies tuvo mayor abundancia y riqueza de esporas de HMA que el suelo sin helechos. En total se registraron 13 géneros y 32 morfoespecies de HMA. Las morfoespecies de Glomus se detectaron en ambos ecosistemas, mientras que Racocetra, Scutellospora, Diversispora y Gigaspora fueron exclusivas del bosque mesófilo. La baja micorrización arbuscular se atribuyó a los altos niveles de materia orgánica, N total y P inorgánico; la MA fue más activa en Ch. bonariensis, especie del matorral xerófilo, lo cual sugiere que la MA es regulada por la disponibilidad de recursos y la identidad del helecho. Las cuatro especies forman reservorios de HMA, lo que indica que los helechos podrían generar inóculos nativos útiles para la restauración ambiental de sus ecosistemas.
State COVID-19 Vaccine Mandates and Uptake Among Health Care Workers in the US
Authors: Wang Yin , Stoecker Charles , Callison Kevin , Hernandez Julie H. 
Published: August 2024

ImportanceSeventeen states introduced COVID-19 vaccine mandates for health care workers (HCWs) in mid-2021. Prior research on the effect of these mandates was centered on the nursing home sector, and more evidence is needed for their effect on the entire HCW population.ObjectiveTo examine the association between state COVID-19 vaccine mandates for HCWs and vaccine uptake in this population.Design, Setting, and ParticipantsThis repeated cross-sectional study included biweekly, individual-level data for adults aged 25 to 64 years who were working or volunteering in health care settings obtained from the Household Pulse Survey between May 26 and October 11, 2021. Analyses were conducted between November 2022 and October 2023.ExposureAnnouncement of a state COVID-19 vaccine mandate for HCWs.Main Outcomes and MeasuresAn indicator for whether a sampled HCW ever received a COVID-19 vaccine and an indicator for whether an HCW completed or intended to complete the primary COVID-19 vaccination series. Event study analyses using staggered difference-in-differences methods compared vaccine uptake among HCWs in mandate and nonmandate states before and after each mandate announcement. The sample was further stratified by the availability of regular COVID-19 testing in place of a vaccination (ie, a test-out option) and by the ages of HCWs (25-49 or 50-64 years) to examine heterogeneous associations.ResultsThe study sample included 31 142 HCWs (mean [SD] age, 45.5 [10.6] years; 72.1% female) from 45 states, 16 of which introduced COVID-19 vaccine mandates for HCWs. Results indicated a mandate-associated 3.46–percentage point (pp) (95% CI, 0.29-6.63 pp; P = .03) increase in the proportion of HCWs ever vaccinated against COVID-19 and a 3.64-pp (95% CI, 0.72-6.57 pp; P = .02) increase in the proportion that completed or intended to complete the primary vaccination series 2 weeks after mandate announcement from baseline proportions of 87.98% and 86.12%, respectively. In the stratified analyses, positive associations were only detected in mandate states with no test-out option and among HCWs aged 25 to 49 years, which suggested vaccination increases of 3.32% to 7.09% compared with baseline proportions.Conclusions and RelevanceThis repeated cross-sectional study found that state COVID-19 vaccine mandates for HCWs were associated with increased vaccine uptake among HCWs, especially among younger HCWs and those in states with no test-out option. These findings suggest the potential for vaccine mandates to further promote vaccinations in an already highly vaccinated HCW population, especially when no test-out option is in place.
Optical Activity and Phase Transformations in γ/β Ga2O3 Bilayers Under Annealing
Authors: Azarov Alexander , Galeckas Augustinas , Cora Ildikó , Fogarassy Zsolt , Venkatachalapathy Vishnukanthan , Monakhov Eduard , Kuznetsov Andrej 
Published: August 2024

AbstractGallium oxide (Ga2O3) can be crystallized in several polymorphs exhibiting different physical properties. In this work, polymorphic structures consisting of the cubic defective spinel (γ) film on the top of the monoclinic (β) substrate are fabricated by disorder‐induced ordering, known to be a practical way to stack these polymorphs together. Such bilayer structures are annealed to investigate optical properties and phase transformations. Specifically, photoluminescence and diffuse reflectance spectroscopy are combined with transmission electron microscopy, Rutherford backscattering/channeling spectrometry and X‐ray diffraction to monitor the evolutions. As a result, a two‐stage annealing kinetics is observed in γ/β Ga2O3 bilayers associated with the epitaxial γ‐to‐β regrowth at the interface at temperatures below 700 °C and a non‐planar γ‐to‐β phase transformation starting at higher temperatures. Thus, the present data enhance understanding of the polymorphism in Ga2O3, interconnecting the phase transformation kinetics with the evolution of the optical properties.
Diastereoselective Synthesis of Dearomatic 2‐Oxa‐7‐Azaspiro[4.5]Decane Derivatives through Gold and Palladium Relay Catalytic Tandem Cyclization of Enynamides with Vinyl Benzoxazinanones
Authors: Xu Jiaming , Gao Yanfeng , Gao Xin , Miao Zhiwei 
Published: August 2024

AbstractWe present a diastereoselective Au/Pd relay catalytic tandem cyclization reaction to produce dearomatic 2‐oxa‐7‐azaspiro[4.5]decane derivatives under mild conditions. This process involves generating furan‐derived azadiene from readily available enynamide, followed by a [2+4] cycloaddition with Pd‐π‐allyl dipole decarboxylated from vinyl benzoxazinanone. Our method efficiently constructs the spiro[4.5]decane skeleton, achieving yields ranging from 31–97% and diastereoselectivities from 6:1 dr to >20:1 dr across 34 examples. This research introduces new cycloaddition sites for azadienes as 1,2‐dipoles and offers a reliable approach for constructing oxa‐azaspiro[4.5]decane frameworks.
Composites of 2D Materials and Bacterial Cellulose for Sustainable Energy Storage and Environmental Remediation
Authors: Gusain Rashi , Kumar Neeraj , Seyedin Shayan , Jiang Yunhong 
Published: August 2024

AbstractThe ever‐increasing demand for sustainable energy sources and environment protection is the focus of significant scientific scrutiny worldwide. Advanced composite materials have been developed to help meet the energy demand and environmental sustainability. Researchers are drawn to the study of two‐dimensional (2D) materials/bacterial cellulose (BC) composites for energy and environmental applications due to the intriguing electrical, mechanical, electrochemical, and catalytic properties of 2D materials combined with the sustainability and biocompatibility of BC. In this review, the key strategies are explained to develop 2D materials/BC composites and highlight unique properties of such fascinating systems. The recent progress on the application of advanced 2D materials/BC composites in energy storage (supercapacitors and batteries) and environmental remediation (water treatment, antimicrobial activity, and environmental gas sensing) are explained in detail highlighting future outlooks and challenges in the field. This review is intended to serve as a valuable resource for researchers currently engaged in the study of 2D materials and/or BC for different applications and is expected to shape the upcoming research and industrial applications of emerging 2D materials/BC composites.
Optical Properties of Three‐Electron GaAs/AlxGa1−xAs QDs with Finite Confinement Potential
Authors: Yakar Yusuf , Çakır Bekir , Özmen Ayhan 
Published: August 2024

AbstractIn the case of finite confinement potential, the average energies and corresponding wave functions for the 1s2nl configurations, in which nl = 2s, 2p, 3d, and 4f, of three‐electron GaAs/AlxGa1−xAs quantum dot with and without impurity are computed by using a new variational approach which is a combination of Quantum Genetic Algorithm procedure and Hartree–Fock–Roothaan method. Using the calculated average energies and wave functions, a detailed investigation of the linear, third‐order nonlinear and total absorption coefficients (ACs) and the refractive index changes (RICs) for the quantum dot is performed, and the obtained results are presented as a function of dot radius and photon energies. The results show that the dot radius, the impurity charge, and the height of potential barrier have a strong influence on the average energies and absorption spectra of the system. As the potential barrier height increases, the peak positions of the ACs and RICs shift toward higher energy, and there is a significant increase in the amplitudes of the absorption spectra as the potential barrier height increases. In addition, the electron wave functions begin to enter the quantum well at smaller dot radii with increasing barrier height.
Humidity‐adaptive, mechanically robust, and recyclable bioplastic films amplified by nanoconfined assembly
Authors: Wang Siheng , Zhang Lei , Wang Zhuomin , Song Zhanqian , Liu He , Tian Ziqi , Xu Xu 
Published: August 2024

AbstractPoly(vinyl alcohol) (PVA) is biodegradable, recyclable, and has high tensile strength. Therefore, it is ideal for the development of environment‐friendly sustainable bioplastics. However, at elevated humidity, the mechanical properties of PVA bioplastic films undergo degradation owing to their intrinsic hydrophilic and hygroscopic nature, hindering their applications. This study proposes a nanoconfined assembly strategy to produce humidity‐adaptive, mechanically robust, and recyclable bioplastic film. The strong hydrogen bonds between PVA and cellulose nanofibrils inhibit the penetration of water molecules into the film to promote humidity resistance. Further, the robust coordination interactions between bentonite nanoplates, PVA, and cellulose nanofibrils restrict the slip of polymer chains during deformation, leading to enhanced mechanical properties. Benefiting from the nanoconfined assembly architecture in aggregated composites, the resulting reinforced PVA film simultaneously exhibits strength, stiffness, toughness, fracture energy, and tearing energy of 55.9 MPa, 1,275.6 MPa, 162.9 MJ m−3, 630.9 kJ m−2, and 465.0 kJ m−2, respectively. Moreover, the film maintains a strength of approximately 48.7 MPa even at 80% relative humidity for 180 days. This efficient design strategy applies to diverse scales and structured cellulose biomacromolecules. Moreover, it facilitates the application of recyclable high‐performance bioplastic films to settings that require high humidity tolerance.
Efficient extraction of hydrogen fluoride using hollow fiber membrane contactors with the aid of active‐learning
Authors: Park Jimin , Cheon Mujin , Kim David Inhyuk , Park Daeseon , Lee Jay H. , Koh Dong‐Yeun 
Published: August 2024

AbstractThis study presents a sustainable approach to extracting hydrogen fluoride (HF) from wastewater using hollow fiber membrane contactors. HF, a widely used yet hazardous chemical, requires efficient separation techniques due to its environmental and health concerns. Our research compared two operational modes, vacuum mode and liquid–liquid extraction mode, revealing the latter as more efficient for HF separation. Notably, this study introduces a novel aspect by employing a data‐driven decision‐making method, Bayesian optimization (BO) for process optimization of the liquid–liquid extraction mode, aiming to maximize HF removal efficiency at low experimental costs. Subsequent validation through a 96‐h experimental run confirms the suitability of the optimized conditions for industrial applications. This study not only demonstrates an efficient HF separation process using hollow fiber membrane contactors but also establishes a new standard for complex industrial process optimization.
Increasing research study engagement in minoritized populations: An example from the Black Women Inflammation and Tau Study
Authors: Stradford Joy , Heyworth Nadine C. , Jackson Michelle , Norman Marc , Banks Sarah J. , Sundermann Erin E. , Thames April D. 
Published: August 2024

AbstractBlack women are sorely underrepresented in studies of Alzheimer's disease and related dementias (ADRD) despite higher rates of ADRD diagnoses than in non‐Hispanic White women. There are many reasons for underrepresentation, including medical mistrust, limited access to clinical studies, and restrictive study inclusion criteria. These pervasive barriers to research participation are often not considered during study development and, if eventually thought of tend to be after the fact. Community‐engaged research (CER) approaches are an effective method for reducing participation barriers. This article describes how CER approaches were used to develop the Black Women Inflammation and Tau Study (BWITS), a prospective study to identify biopsychosocial risk factors for ADRD in Black women. Guidelines discussed here for future ADRD research in diverse populations are informed by Community‐Based Participatory Research (CBPR), the National Institute on Minority Health and Health Disparities (NIMHD), and the Patient‐Centered Outcomes Research Institute (PCORI).Highlights
Understand the historical tragedies related to medical practices and research designs that may contribute to the underrepresentation of Black Americans in research studies today.
Highlight community‐engaged research approaches that effectively reduce participation barriers in minoritized groups.
Review Community‐Based Participatory Research, National Institute of Minority Health and Health Disparities, and the Patient‐Centered Outcomes Research Institute guidelines for conducting research with minoritized communities.
Describe using the three frameworks to inform the study development protocol for the Black Women Inflammation and Tau Study.
Conclude by offering study design considerations that we hope can be a helpful starting point for others conducting research with minoritized communities.
Photocleavable Protecting Groups Using a Sulfite Self‐Immolative Linker for High Uncaging Quantum Yield and Aqueous Solubility
Authors: Schulte Albert Marten , Vivien Quentin , Leene Julia H. , Alachouzos Georgios , Feringa Ben L. , Szymanski Wiktor 
Published: August 2024

AbstractUsing light as an external stimulus to control (bio)chemical processes offers many distinct advantages. Most importantly, it allows for spatiotemporal control simply through operating the light source. Photocleavable protecting groups (PPGs) are a cornerstone class of compounds that are used to achieve photocontrol over (bio)chemical processes. PPGs are able to release a payload of interest upon light irradiation. The successful application of PPGs hinges on their efficiency of payload release, captured in the uncaging Quantum Yield (QY). Heterolytic PPGs efficiently release low pKa payloads, but their efficiency drops significantly for payloads with higher pKa values, such as alcohols. For this reason, alcohols are usually attached to PPGs via a carbonate linker. The self‐immolative nature of the carbonate linker results in concurrent release of CO2 with the alcohol payload upon irradiation. We introduce herein novel PPGs containing sulfites as self‐immolative linkers for photocaged alcohol payloads, for which we discovered that the release of the alcohol proceeds with higher uncaging QY than an identical payload released from a carbonate‐linked PPG. Furthermore, we demonstrate that uncaging of the sulfite‐linked PPGs results in the release of SO2 and show that the sulfite linker improves water solubility as compared to the carbonate‐based systems.
The Promise of Carbon Nano‐Onions: Preparation, Characterization and Their Application in Electrochemical Sensing
Authors: Almeida Gonzalez Hector Daniel , Hernandez Ojeda Janser , Corcho‐Valdés Angel Luis , Padron‐Ramirez Ivan , Perez Cruz Marina , Iriarte‐Mesa Claudia , Desdin‐Garcia Luis Felipe , Gobbo Pierangelo , Antuch Manuel 
Published: August 2024

AbstractCarbon nano‐onions (CNOs) promise to improve the range of applications of carbon materials for electroanalytical applications. In this review, we explore the synthesis, characterization, and electrochemical applications of CNOs. CNO‐based sensors present impressive features, including low detection limits in the femtogram per milliliter range, a broad linear detection range spanning up to 7 orders of magnitude, exceptional selectivity, reproducibility, and stability. Synthetic methods and characterization techniques for CNOs were thoroughly examined, shedding light on their pivotal role in biosensing technologies. Comparative analyses with other carbon materials underscore CNOs′ competitive performance, either surpassing or matching many counterparts. Despite their relatively recent integration in biosensing applications, CNOs exhibit comparable or superior results concerning other carbon‐based materials. Indeed, the incorporation of CNOs into hybrid nanocomposites has shown promising outcomes, indicating a synergistic potential for future advancements in biosensing technologies. Our review provides a broad approach to the application of CNOs to the field, with emphasis on breakthroughs of the last 5 years.
Effect of Bipyridines on Catalytic Oxygen Reduction by Oxamidato‐Bridged Dicopper(II) Complexes
Authors: Liu Hao‐Cheng , Li Shuai‐Kang , Liu Zi‐Heng , Liu Chang , Yang Xing‐Jin , Luo Zi‐Li , Li Ran‐Ran , Wang Tian‐Shun , Zhang Hua‐Xin 
Published: August 2024

ABSTRACTThe oxygen reduction reaction (ORR) has a crucial impact on the energy conversion efficiency and the performance of fuel cells, it is urgent to deliver low‐cost efficient ORR catalysts for the aim to scale up the utilization of fuel cells. In this study, three oxamidate copper(II) complexes [Cu2(trans‐L)(H2O)2(ClO4)2]·2H2O (Cuox), [Cu2(cis‐L)(bpy)(ClO4)2]·CH3OH (Cuoxbpy), and [Cu2(cis‐L)(mebpy)(ClO4)](ClO4) (Cuoxmebpy) (L = N,N–bis(2–pyridylmethyl)oxamide, bpy = 2,2′–bipyridine, and mebpy = 4,4′–dimethyl–2,2′–bipyridine) were prepared and characterized. The configuration of L varied from the trans form to the cis form as the bipyridines were introduced to the dicopper complex. The redox properties of three oxamidate copper(II) complexes and their catalytic activities for the ORR were studied in neutral aqueous solutions. The ORR onset potentials by Cuox, Cuoxbpy, and Cuoxmebpy were 0.417, 0.502, and 0.481 versus RHE, respectively. Three complexes homogeneously catalyzed the ORR to predominantly generate H2O2. A bimolecular catalytic pathway was proposed for the ORR mediated by Cuox, whereas a single‐molecular pathway was by Cuoxbpy and Cuoxmebpy. This work demonstrated that oxamidate metal complexes are promising ORR catalyst candidates provided that their electronic structures are appropriately tuned by altering the substituent on the organic ligands.
Sustainable Hard Carbon as Anode Materials for Na‐Ion Batteries: From Laboratory to Upscaling
Authors: Guo Zhenyu , Zheng Kaitian , Wang Mengnan , Huang Yichen , Zhao Yuanzhu , Au Heather , Titirici Maria‐Magdalena 
Published: August 2024

AbstractSodium‐ion batteries (NIBs) are an alternative to lithium‐ion batteries (LIBs), particularly in applications where cost, availability, and sustainability are more critical. Hard carbon is emerging as a promising anode material for NIBs, however, the scale up remains in developmental stages. In this study, we focus on the development and potential upscaling of sustainable hard carbon materials as anodes for NIBs. The synthesis of hard carbon starts from D‐glucose, a scalable and environmentally benign precursor. A facile process combining hydrothermal carbonisation and subsequent pyrolysis at 1500 °C allows the hard carbon to become an industrially viable material. The resulting hard carbon demonstrates competitive performance metrics including a high initial Coulombic efficiency, high reversible capacity, long‐term cycling stability, and rate capability. This study concludes with a discussion of the techno‐economic analysis of adopting such sustainable materials in the battery industry, highlighting the potential for significant advancements in energy storage technologies.
Sequential delivery of photosensitizers and checkpoint inhibitors by engineered bacteria for enhanced cancer photodynamic immunotherapy
Authors: Liu Xinyu , Fan Yali , Zhang Xinyu , Li Lianyue , Yang Chao , Ma Xiaoyan , Bai Guijie , Sun Dawei , Wang Yaxin , Wang Junyi , Li Yong , Shi Yanyan , Liu Jing , Zhang Yingying , Wang Hanjie 
Published: August 2024

AbstractEngineered bacteria‐based cancer therapy has increasingly been considered to be a promising therapeutic strategy due to the development of synthetic biology. Wherein, engineering bacteria‐mediated photodynamic therapy (PDT)‐immunotherapy shows greater advantages and potential in treatment efficiency than monotherapy. However, the unsustainable regeneration of photosensitizers (PSs) and weak immune responses limit the therapeutic efficiency. Herein, we developed an engineered bacteria‐based delivery system for sequential delivery of PSs and checkpoint inhibitors in cancer PDT‐immunotherapy. The biosynthetic pathway of 5‐aminolevulinic acid (5‐ALA) was introduced into Escherichia coli, yielding a supernatant concentration of 172.19 mg/L after 10 h of growth. And another strain was endowed with the light‐controllable releasement of anti‐programmed cell death‐ligand 1 nanobodies (anti‐PD‐L1). This system exhibited a collaborative effect, where PDT initiated tumor cell death and the released tumor cell fragments stimulated immunity, followed by the elimination of residual tumor cells. The tumor inhibition rate reached 74.97%, and the portion of activated T cells and inflammatory cytokines were reinforced. The results demonstrated that the engineered bacteria‐based collaborative system could sequentially deliver therapeutic substance and checkpoint inhibitors, and achieve good therapeutic therapy. This paper will provide a new perspective for the cancer PDT‐immunotherapy.