Jeffrey E. Post
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View article: Crystal Structure Evolution of Nanohematite during Dissolution: Evidence for Partitioning of Iron Vacancies in Nanoparticle Shells
Crystal Structure Evolution of Nanohematite during Dissolution: Evidence for Partitioning of Iron Vacancies in Nanoparticle Shells Open
Changes in the crystal structure of hematite (Fe2O3) during dissolution were analyzed using in situ, time-resolved X-ray diffraction (TRXRD) of synthetic hematite powders in 3 M HCl solutions. The refined Fe occupancy in hematite increased…
View article: Fingerprinting the Water and Vacancy Sites in Superhydrous Hematite: Neutron Scattering and First Principles Studies
Fingerprinting the Water and Vacancy Sites in Superhydrous Hematite: Neutron Scattering and First Principles Studies Open
Hematite (α-Fe2O3) is a low-cost, naturally abundant, and stable iron oxide with promising applications in energy applications such as photoelectrochemical water splitting, piezocatalysis, and microbial fuel cells. A superhydrous form, hyd…
View article: <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>T</mml:mi></mml:math>-linear resistivity, optical conductivity, and Planckian transport for a holographic local quantum critical metal in a periodic potential
-linear resistivity, optical conductivity, and Planckian transport for a holographic local quantum critical metal in a periodic potential Open
High-Tc cuprate strange metals are characterized by a DC resistivity that scales linearly with T from the onset of superconductivity to the crystal melting temperature, characterized by a current life time τℏ≃ℏ/(kBT), the “Planckian dissi…
View article: Delabeling, safety, and impact of β-lactam allergy testing: A systematic review
Delabeling, safety, and impact of β-lactam allergy testing: A systematic review Open
The available data suggest that penicillin allergy testing is safe and effective in delabeling most individuals, but the evidence base is incomplete and more work is required to assess the role of skin testing and the impact that delabelin…
View article: Mineralogical characterization of biosilicas versus geological analogs
Mineralogical characterization of biosilicas versus geological analogs Open
Non‐crystalline silica mineraloids are essential to life on Earth as they provide architectural structure to dominant primary producers, such as plants and phytoplankton, as well as to protists and sponges. Due to the difficulty in charact…
View article: The crystal structure of feitknechtite (β-MnOOH) and a new MnOOH polymorph
The crystal structure of feitknechtite (β-MnOOH) and a new MnOOH polymorph Open
Studies suggest that feitknechtite (β-MnOOH) is a prevalent, and perhaps necessary, intermediate phase during the synthesis of birnessite-like phases, the abiotic oxidation of Mn2+, and the transformation of biogenic hexagonal phyllomangan…
View article: A subacute presentation of <i>Mycoplasma hominis</i> prosthetic valve endocarditis
A subacute presentation of <i>Mycoplasma hominis</i> prosthetic valve endocarditis Open
Mycoplasma hominis is a rare but important cause of prosthetic valve endocarditis. It is usually associated with acute progression of symptoms and can be difficult to diagnose as it does not grow in standard culture media. We report a case…
View article: Standardized testing and written communication improve patient understanding of beta-lactam allergy testing outcomes: A multicenter, prospective study
Standardized testing and written communication improve patient understanding of beta-lactam allergy testing outcomes: A multicenter, prospective study Open
Standardization of testing and written patient information improved short-term patient perception of beta-lactam allergy status.
View article: Superhydrous hematite and goethite: A potential water reservoir in the red dust of Mars?
Superhydrous hematite and goethite: A potential water reservoir in the red dust of Mars? Open
Water can be stored in nominally anhydrous minerals as substitutional hydroxyl, generating vast but commonly unrecognized H2O reservoirs in ostensibly dry regimes. Researchers have long known that hematite (α-Fe2O3) can accommodate small c…
View article: Differences in Antibiotic and Antiviral Use in People With Confirmed Influenza: a Retrospective Comparison of Rapid Influenza&nbsp;PCR and Multiplex Respiratory Virus PCR Tests.
Differences in Antibiotic and Antiviral Use in People With Confirmed Influenza: a Retrospective Comparison of Rapid Influenza PCR and Multiplex Respiratory Virus PCR Tests. Open
BACKGROUND Influenza is a highly contagious respiratory virus with clinical impacts on patient morbidity, mortality and hospital bed management. The effect of rapid nucleic acid testing (RPCR) in comparison to standard multiplex PCR (MPCR)…
View article: Raman spectroscopy study of manganese oxides: Layer structures
Raman spectroscopy study of manganese oxides: Layer structures Open
Raman spectra were collected for an extensive set of well-characterized layer-structure Mn oxide mineral species (phyllomanganates) employing a range of data collection conditions. We show that the application of various laser wavelengths,…
View article: Effects of pH and Ca exchange on the structure and redox state of synthetic Na-birnessite
Effects of pH and Ca exchange on the structure and redox state of synthetic Na-birnessite Open
Birnessite-like minerals are among the most common Mn oxides in surficial soils and sediments, and they mediate important environmental processes (e.g., biogeochemical cycles, heavy metal confinement) and have novel technological applicati…
View article: Raman spectroscopy study of manganese oxides: Tunnel structures
Raman spectroscopy study of manganese oxides: Tunnel structures Open
Raman spectra were collected for an extensive set of well-characterized tunnel-structure Mn oxide mineral species employing a range of data collection conditions. Using various laser wavelengths, such as 785, 633, and 532 nm at low power l…
View article: A multi-method characterization of natural terrestrial birnessites
A multi-method characterization of natural terrestrial birnessites Open
With a focus on a large set of natural birnessites collected from terrestrial, freshwater systems, we applied and compared the capabilities of X-ray diffraction (XRD), extended X-ray absorption fine structure (EXAFS), Fourier-transform inf…
View article: Coupled morphological and structural evolution of δ-MnO<sub>2</sub> to α-MnO<sub>2</sub> through multistage oriented assembly processes: the role of Mn(<scp>iii</scp>)
Coupled morphological and structural evolution of δ-MnO<sub>2</sub> to α-MnO<sub>2</sub> through multistage oriented assembly processes: the role of Mn(<span>iii</span>) Open
δ-MnO2 transforms to α-MnO2 through a multistage oriented assembly process which is induced by Mn(iii).