Lineage diversification and rampant hybridization among subspecies explain taxonomic confusion in the endemic Hawaiian fern Polypodium pellucidum.

Premise: Polypodium pellucidum, a fern endemic to the Hawaiian Islands, encompasses five ecologically and morphologically variable subspecies, suggesting a complex history involving both rapid divergence and rampant hybridization.

Methods: We employed a large target-capture data set to investigate the evolution of genetic, morphological, and ecological variation in P. pellucidum.

Predictors of Mortality in Blunt Cardiac Injury: A Nationwide Analysis.

Introduction: Blunt thoracic injury (BTI) is one of the most common causes of trauma admission in the United States and is uncommonly associated with cardiac injuries. Blunt cardiac injury (BCI) after blunt thoracic trauma is infrequent but carries a substantial risk of morbidity and sudden mortality. Our study aims to identify predictors of concomitant cardiac contusion among BTI patients and the predictors of mortality among patients presenting with BCI on a national level.

Trends in Geriatric Ground-Level Falls: Report from the National Trauma Data Bank.

Introduction: Ground-level falls (GLF) are typically reported as a minor mechanism of injury; however, they represent a significant portion of hospitalized geriatric trauma patients as they can result in multisystem injury in this subset of the population. Our study aimed to analyze trends in geriatric trauma falls on the national level.

Methods: We performed a 5-y (2011-2015) analysis of the American College of Surgeons National Trauma Data Bank (ACS-NTDB) and included all geriatric trauma patients (age ≥ 65 y) who presented with GLF.

Firearm-Related Injuries: A Single Center Experience.

Introduction: Firearm-related injuries (FRI) are an important public health crisis in the US. There is relatively less city level data examining the injury-related trends in Tucson, Arizona. Our study aims to examine FRI, in Southern Arizona's only Level I trauma center.

DNA sequencing of type material and newly collected specimens reveals two heterotypic synonyms for Harveylithon munitum (Metagoniolithoideae, Corallinales, Rhodophyta) and three new species.

Nongeniculate coralline algae are difficult to identify based solely on morpho-anatomy. To address the systematics of several taxonomically challenging taxa, we analyzed DNA sequences of a short portion (118-296 base pairs) of the 3' end of the rbcL gene from three type specimens. The analyses revealed that Harveylithon munitum (basionym: Lithophyllum munitum), described in 1906 from Cave Cays, Exuma Chain, Bahamas, is conspecific with both Goniolithon accretum and Goniolithon affine, described in 1906 from Sand Key, Florida and in 1907 from Culebra Island, Puerto Rico, respectively.

Facial Surgery in the Era of SARS-CoV-2 and Beyond: Challenges, Considerations, and Initiatives.

The SARS-CoV-2 pandemic resulted in the implementation of healthcare practice regulations and restrictions across the United States. To facilitate safe patient management practices for facial plastic and reconstructive surgeons, appropriate guidelines and recommendations should be followed. Guidelines and recommendations should include a synthesis of the best evidence available from public health authorities and respected members in the surgery community.

The neuroprotective effect of quetiapine in critically ill traumatic brain injury patients.

Introduction: Quetiapine is an atypical antipsychotic commonly used in critical care. Cellular and animal models demonstrated its novel anti-inflammatory properties in traumatic brain injury (TBI). Our study aimed to assess the effect of quetiapine on outcomes in critically ill TBI patients.

The coralline genera Sporolithon and Heydrichia (Sporolithales, Rhodophyta) clarified by sequencing type material of their generitypes and other species.

Interspecific systematics in the red algal order Sporolithales remains problematic. To re-evaluate its species, DNA analyses were performed on historical type material and recently collected specimens assigned to the two genera Sporolithon and Heydrichia. Partial rbcL sequences from the lectotype specimens of Sporolithon ptychoides (the generitype species) and Sporolithon molle, both from El Tor, Egypt, are exact matches to field-collected topotype specimens.

Rotational Dynamics and Heating of Trapped Nanovaterite Particles.

We synthesize, optically trap, and rotate individual nanovaterite crystals with a mean particle radius of 423 nm. Rotation rates of up to 4.9 kHz in heavy water are recorded.

Observation of image pair creation and annihilation from superluminal scattering sources.

The invariance of the speed of light is one of the foundational pillars of our current understanding of the universe. It implies a series of consequences related to our perception of simultaneity and, ultimately, of time itself. Whereas these consequences are experimentally well studied in the case of subluminal motion, the kinematics of superluminal motion lack direct evidence or even a clear experimental approach.

Aragonite infill in overgrown conceptacles of coralline Lithothamnion spp. (Hapalidiaceae, Hapalidiales, Rhodophyta): new insights in biomineralization and phylomineralogy.

New empirical and quantitative data in the study of calcium carbonate biomineralization and an expanded coralline psbA framework for phylomineralogy are provided for crustose coralline red algae. Scanning electron microscopy (SEM) and energy dispersive spectrometry (SEM-EDS) pinpointed the exact location of calcium carbonate crystals within overgrown reproductive conceptacles in rhodolith-forming Lithothamnion species from the Gulf of Mexico and Pacific Panama. SEM-EDS and X-ray diffraction (XRD) analysis confirmed the elemental composition of these calcium carbonate crystals to be aragonite.

Exclusion of a luminous red giant as a companion star to the progenitor of supernova SN 2011fe.

Type Ia supernovae are thought to result from a thermonuclear explosion of an accreting white dwarf in a binary system, but little is known of the precise nature of the companion star and the physical properties of the progenitor system. There are two classes of models: double-degenerate (involving two white dwarfs in a close binary system) and single-degenerate models. In the latter, the primary white dwarf accretes material from a secondary companion until conditions are such that carbon ignites, at a mass of 1.

Factors that influence physicians' recommendation of hospice care: An exploratory study.

Palliative care and an array of attending services for terminally ill patients are available through over 2,465 hospices in the United States today. Although the actual number of terminally ill patients receiving hospice care has increased over the past decade, there is a growing concern of underutilization. Research has reported that despite meeting eligibility requirements only twenty-five percent of terminally ill patients have been served by hospice.