Publications by authors named "Atwood J"

(subg. ) sect. has been studied using integrative taxonomy methods and utilizing sampling from almost all areas of distribution of the species previously referred to this section.

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We report on a two-dimensional hexagonal "honeycomb" network comprising barium-seamed metal-organic nanocapsules involving a hexameric assembly of pyrogallol[4]arene ligands. The incorporated barium ions act as spacers to generate a solvent-accessible void, hierarchical self-assembly having an individual void volume near 13 000 Å. This work illustrates the surprising chemistry that remains to be discovered by integrating large or classically non-reactive metal ions within supramolecular assemblies, networks, and organic nanocapsules.

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Article Synopsis
  • Researchers developed metal-organic nanocapsules that self-assemble using vanadium with specific metal oxidation states.
  • The study created three types of capsules with the same components: a VL capsule, a mixed-valence VVL capsule, and another VL capsule.
  • Crystallography showed these capsules have complex structures, and their different metal oxidation states influence their photoelectric conversion properties, highlighting advances in customizable metal-organic structures.
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The inception of an unprecedented class of voluminous Platonic solids displaying hierarchical geometry based on pyrogallol[4]arene moieties seamed by divalent calcium ion is described. Single-crystal X-ray structural determination has established the highly conserved geometry of two original Ca-seamed nanocapsules to be essentially cubic in shape with -ethylpyrogallol[4]arene units located along the twelve edges of the cube which are then bridged by metallic polyatomic cations ([CaCl] or [Ca(HCO)Na]) at the six cube faces. The accessible volume of the nanocapsules is 3500 Å and 2500 Å and is completely isolated from the exterior of the capsules.

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Objective: This paper estimates the latest trends regarding the effect of sex on driver-side or right-front passenger-side occupant fatalities in fatal crashes. The focus is on how recent model year (MY) light vehicles with advanced occupant protection technologies compare to older vehicles without these protections in terms of female fatality risk relative to males.

Methods: Data from the Fatality Analysis Reporting System (FARS) from 1975 to 2019 is used to calculate estimates of female fatality risk relative to males using logistic regression models and the double-pair comparison method.

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Background: Limited information exists to guide shared clinical decision making on COVID-19 vaccination in persons with a prior history of vaccine-associated myocarditis, pericarditis, or myopericarditis (VAMP). The objective of this retrospective observational case series was to characterize cardiac outcomes within 30 days following receipt of 1 or more COVID-19 vaccinations during 2021 in US service members diagnosed with prior non-COVID-19 VAMP between 1998 and 2019.

Methods: As part of the collaborative public health mission with the Centers for Disease Control and Prevention for enhanced vaccine adverse events surveillance, the Defense Health Agency Immunization Healthcare Division maintains a clinical database of service members and beneficiaries referred for suspected adverse events following immunizations.

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Objectives: (1) Characterize the initial clinical characteristics and long-term outcomes of smallpox vaccine-associated hypersensitivity myocarditis and pericarditis (MP) in United States service members. (2) Describe the process of case identification and adjudication using the 2003 CDC nationally defined myocarditis/pericarditis epidemiologic case definitions to include consideration of case-specific diversity and evolving evidence.

Background: Between 2002 and 2016, 2.

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Article Synopsis
  • A novel Cu-seamed coordination nanocapsule serves as an effective semiconductor photocatalyst for activating molecular oxygen.
  • The capsule is formed from a self-assembly process involving cuprous bromide and -pentyl-pyrogallol[4]arene, demonstrating strong absorption of visible light.
  • The study highlights its ability to generate reactive oxygen species under simulated sunlight, paving the way for new approaches to catalyze aerobic oxidation reactions using nonporous metal-organic supramolecular structures.
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Background: The HEART score for risk stratifying chest pain patients in the emergency department (ED) has been widely adopted in clinical practice, but is often employed with nonconformant serial troponin measurements.

Objective: The primary objective of this study was to examine the utility of obtaining a second conventional 3-h troponin I (TnI) level in ED patients presenting with potential acute coronary syndrome (ACS), stratified by HEART score and duration of symptoms.

Methods: This was a retrospective cohort study of consecutive adult ED patients with a complete HEART score.

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Background: ST elevation myocardial infarction (STEMI) represents a cardiac emergency. Time to diagnosis, identification of culprit lesion, and intervention are important. Inferior STEMI represents a dilemma for cardiologists.

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Management of Acute Coronary Syndrome.

Emerg Med Clin North Am

November 2022

One of the most common complaints encountered in the emergency department is chest pain. In many evaluations, the leading diagnostic consideration is an acute coronary syndrome (ACS). ACS refers to a spectrum of coronary artery pathologies, including unstable angina, non-ST segment elevation myocardial infarction, and ST-segment elevation myocardial infarction.

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Adeno-associated virus (AAV) has shown great potential in gene therapy due to its low immunogenicity, lack of pathogenicity to humans, and ability to provide long-term gene expression . However, there is currently a need for fast, high-throughput characterization systems that require low volumes for the determination of its sample composition in terms of full and empty capsids since empty capsids are a natural byproduct of AAV synthesis. To address this need, the following study proposes a high-throughput electrophoresis-mediated microfluidics approach that is independent of sample input concentration to estimate the composition of a given sample by combining its protein and ssDNA information relative to a standard.

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The magnetic properties of nickel-seamed C-pyrogallol[4]arene (PgC Ni) hexamers and dimers are studied for the first time in solution. The combination of small-angle neutron scattering and superconducting quantum interference device magnetometer measurements of the solution species reveal their paramagnetic and weakly antiferromagnetic behaviour. Surprisingly, the magnetic results indicated the presence of an unprecedented 13 Å-radius species, larger than both the dimeric and hexameric nanocapsules with both octahedral and square-planar metal centers.

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Background: This paper presents the effectiveness of a multi-component elementary school-based nutrition education program, the Integrated Nutrition Education Program (INEP), which has been in existence for over 25 years. INEP includes components to address multiple layers of influence: hands-on nutrition education lessons in the classroom (student-level), parent education, and outreach (home-level), and facilitation of a planning process to implement policy, system, and environmental (PSE) school changes (school-level).

Methods: Three evaluation tools assessed the effectiveness of the program: (1) classroom plate waste measurement in intervention (N = 149 students) and demographically-matched comparison schools (N = 131 students), (2) pre/post classroom surveys completed by students who participated in INEP (N = 204), and (3) PSE change data from participating schools (N = 47 schools).

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Coordination polymers, commonly known as infinite crystalline lattices, are versatile networks and have diverse potential applications in the fields of gas storage, molecular separation, catalysis, optics, and drug delivery, among other areas. Secondary building blocks, mainly incorporating rigid polydentate organic linkers and metal ions or clusters, are commonly employed to construct coordination polymers. Recently, novel building blocks such as coordination polyhedra have been utilized as metal nodes to fabricate coordination polymers.

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Article Synopsis
  • Supramolecular chaperones help assemble protein subunits and metal ions into complex structures, specifically 2D and 3D nanocapsules when combined with hydroxyl-tailed ligands and Mn ions.
  • The dimensionality of these nanocapsules is influenced by how their subunits interact and the use of proline chaperones facilitates the encapsulation of certain functions within the 2D structures.
  • These nanocapsules demonstrate optimized surface properties for enhanced functionality, proving to be effective electrocatalysts for water oxidation with a low overpotential at near-neutral pH.
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The structural stability and solution geometry of zinc-seamed--propylpyrogallol[4]arene dimers has been studied in solution using neutron scattering and 2D-DOSY NMR methods. In comparison with the structures of the analogous copper-/nickel-seamed dimeric entities, the spherical geometry of the PgCZn species ( = 9.4 Å; diffusion coefficient = 1.

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Macromolecular recognition systems are difficult to construct because extremely high recognition ability is required to form a stable host-guest complex toward macromolecules. Herein, we report a novel host-guest recognition motif based on C-propylpyrogallol[4]arene () and a commercially available polymer, polyethylene glycol (PEG). The results show that can selectively entrap PEG with higher molecular weights to form bilayered host-guest complex structures.

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We report the synthesis of a novel metal-organic capsule constructed from six pyrogallol[4]arene macrocycles, which are switched together by 16 Fe and 16 Co ions. This supramolecular structure is the first instance of a spheroidal heterometallic nanocage assembled through a one-step metal-ligand coordination approach. This new assembly also demonstrates an important proof of concept through the formation of multiple heterometallic metal-metal interactions within the capsule framework.

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We report a new synthesis of the water-soluble compound 1,3,5-trihydroxy-2,4,6-trimethylsulfonic acid (1), which exists in two tautomeric forms (60 : 40::enol%:keto%) and can be used as a proton conductor. Quantum chemical calculations show the importance of intramolecular hydrogen bonding and the presence of implicit MeOH solvent on the relative stabilities of the tautomers. 1 complexes with lanthanides through its sulfonato groups and forms a layered cage-like structure with one intramolecular and two intermolecular hydrogen bonds.

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Polymeric metal-organic nanocapsule networks (polyMONCs), where metal-organic nanocapsules (MONCs) are connected by functional polymers, could possess the properties of traditional polymers and also retain the structures of MONCs. In this work, we constructed novel polyMONCs based on Mg-seamed pyrogallol[4]arene-containing MONCs through supramolecular coordination-driven self-assembly. The MONCs can be successfully polymerized using poly(ethylene glycol) as the linker, and the prepared polyMONCs can be further made into gels with self-healing properties and stimuli responsiveness.

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Herein, we report machine learning algorithms by training data sets from a set of both successful and failed experiments for studying the crystallization propensity of metal-organic nanocapsules (MONCs). Among a variety of studied machine learning algorithms, XGBoost affords the highest prediction accuracy of >90%. The derived chemical feature scores that determine importance of reaction parameters from the XGBoost model assist to identify synthesis parameters for successfully synthesizing new hierarchical structures of MONCs, showing superior performance to a well-trained chemist.

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A hexameric metal-organic nanocapsule is assembled from pyrogallol[4]arene units, which are stitched together with indium ions. This indium-seamed capsule is the first instance of a M L type hexameric coordination cage held together exclusively by trivalent metal ions. Explicitly, unlike previously reported pyrogallol[4]arene-based metal-seamed capsules, the current In seamed capsule is entirely supported by O→In coordinate bonds.

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Bimetallic Au Ag nanoparticles, prepared using sodium borohydride as the sole reducing and capping agent for various NaBH : metal molar ratios, were investigated as catalysts for 4-nitrophenol reduction. This approach yielded the highest catalytic activities observed for this model reaction to date.

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We report a simple, single-pot, room temperature synthetic route to prepare colloidally-stable pyrogallol[4]arene-capped gold nanoparticles. The number of carbon atoms in the pyrogallol[4]arene pendent alkyl chain and the addition of base (e.g.

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