Diverse and highly differentiated lava suite in Jezero crater, Mars: Constraints on intracrustal magmatism revealed by Mars 2020 PIXL.

The Jezero crater floor features a suite of related, iron-rich lavas that were examined and sampled by the Mars 2020 rover Perseverance, and whose textures, minerals, and compositions were characterized by the Planetary Instrument for X-ray Lithochemistry (PIXL). This suite, known as the Máaz formation (fm), includes dark-toned basaltic/trachy-basaltic rocks with intergrown pyroxene, plagioclase feldspar, and altered olivine and overlying trachy-andesitic lava with reversely zoned plagioclase phenocrysts in a K-rich groundmass. Feldspar thermal disequilibrium textures indicate that they were carried from their crustal staging area.

Combined division of the splenic vessels and pancreatic parenchyma during laparoscopic distal pancreatectomy is a safe alternative to separate division: a single-institution retrospective study.

Background: Limited data exists regarding the safety and outcomes of combined division of the splenic vessels with the pancreatic parenchyma during laparoscopic distal pancreatectomy (LDP). This study aims to evaluate the combined division technique.

Methods: Patients who underwent LDP for pancreatic cancer from April 2011 to December 2022 were retrospectively reviewed and categorized into the following groups: combined (CV) versus separate (SV) division of the splenic vein; combined (CA) versus separate (SA) division of the splenic artery; and combined (CAV) versus separate (SAV) division of the splenic artery and vein, with or without the pancreatic parenchyma.

Unifying a school of nursing: Developing a framework to guide nursing education.

For one School of Nursing in a mid-sized, urban, private, liberal arts university in the upper Midwest, internal and external factors coalesced, requiring the reassessment/alignment of the baccalaureate, masters, and doctoral programs with professional standards/competencies and institutional mission/values. The development process of a new curricular framework to conceptually support the curriculum within the School of Nursing was reflective of participatory inquiry. The process closely followed the principles of the nursing complexity leadership model, complexity science, and improvement science.

Investigating Microbial Biosignatures in Aeolian Environments Using Micro-X-Ray: Simulation of PIXL Instrument Analyses at Jezero Crater Onboard the Perseverance Mars 2020 Rover.

Assessing the past habitability of Mars and searching for evidence of ancient life at Jezero crater via the rover are the key objectives of NASA's Mars 2020 mission. Onboard the rover, PIXL (Planetary Instrument for X-ray Lithochemistry) is one of the best suited instruments to search for microbial biosignatures due to its ability to characterize chemical composition of fine scale textures in geological targets using a nondestructive technique. PIXL is also the first micro-X-ray fluorescence (XRF) spectrometer onboard a Mars rover.

Faculty Development on the Use of a Clinical Judgment Model in the Pre-licensure Nursing Curriculum.

Clinical judgment is an essential component of safe nursing practice that pre-licensure nursing students should develop by graduation from accredited nursing programs. For novice nurses, the consequences of underdeveloped clinical judgment skills that do not meet the demands of clinical practice are serious. This theory-practice gap correlates with increased numbers of errors occurring during care delivery, resulting in poorer patient outcomes.

A propensity score-matched analysis of laparoscopic versus open pancreaticoduodenectomy: Is there value to a laparoscopic approach?

Background: Laparoscopic pancreaticoduodenectomy has been found safe and associated with advantages over open pancreaticoduodenectomy in prior studies. We compared outcomes of laparoscopic pancreaticoduodenectomy versus open pancreaticoduodenectomy at a single institution after applying technical aspects and perioperative care learned from laparoscopic pancreaticoduodenectomy to the open pancreaticoduodenectomy practice.

Methods: From January 2010 to December 2020, all patients undergoing pancreaticoduodenectomy were identified, and information was collected in a prospective fashion.

Alteration history of Séítah formation rocks inferred by PIXL x-ray fluorescence, x-ray diffraction, and multispectral imaging on Mars.

Collocated crystal sizes and mineral identities are critical for interpreting textural relationships in rocks and testing geological hypotheses, but it has been previously impossible to unambiguously constrain these properties using in situ instruments on Mars rovers. Here, we demonstrate that diffracted and fluoresced x-rays detected by the PIXL instrument (an x-ray fluorescence microscope on the Perseverance rover) provide information about the presence or absence of coherent crystalline domains in various minerals. X-ray analysis and multispectral imaging of rocks from the Séítah formation on the floor of Jezero crater shows that they were emplaced as coarsely crystalline igneous phases.

Strengthening Maternal, Infant, and Young Child Nutrition Training and Counseling in Ghana: A Community-Based Approach.

Background: Evidence-based maternal, infant, and young child nutrition (MIYCN) counseling provides caregivers essential nutrition education to optimize infant and young child feeding practices and subsequently improve child growth and development. Effective integration of responsive feeding (RF) into current MIYCN training requires working with priority communities.

Objectives: Study objectives were to ) assess MIYCN knowledge and practices among Ghanaian caregivers, ) identify factors influencing RF/responsive parenting (RP) among Ghanaian caregivers, ) identify barriers and facilitators influencing MIYCN training and counseling among Ghanaian health care providers, and ) document recommendations for integrating an RF curriculum into the existing MIYCN training.

An olivine cumulate outcrop on the floor of Jezero crater, Mars.

The geological units on the floor of Jezero crater, Mars, are part of a wider regional stratigraphy of olivine-rich rocks, which extends well beyond the crater. We investigated the petrology of olivine and carbonate-bearing rocks of the Séítah formation in the floor of Jezero. Using multispectral images and x-ray fluorescence data, acquired by the Perseverance rover, we performed a petrographic analysis of the Bastide and Brac outcrops within this unit.

Non-Obese MKR Mouse Model of Type 2 Diabetes Reveals Skeletal Alterations in Mineralization and Material Properties.

Obesity is a common comorbidity of type 2 diabetes (T2D). Therefore, increased risk of fragility fractures in T2D is often confounded by the effects of obesity. This study was conducted to elucidate the mechanistic basis by which T2D alone leads to skeletal fragility.

Induction and rescue of skeletal fragility in a high-fat diet mouse model of type 2 diabetes: An in vivo and in vitro approach.

Poor bone quality is associated with Type 2 Diabetes (T2D), with patients having a higher risk of fracture despite normal to high bone mineral density (BMD). Diabetes contributes to modifications of the mineral and organic matrix of bone. Hyperglycemia has been linked to the formation of advanced glycation end-products (AGEs) which increase the risk for skeletal fragility fractures.

Photogeologic Map of the Perseverance Rover Field Site in Jezero Crater Constructed by the Mars 2020 Science Team.

The Mars 2020 Perseverance rover landing site is located within Jezero crater, a ∼ 50 km diameter impact crater interpreted to be a Noachian-aged lake basin inside the western edge of the Isidis impact structure. Jezero hosts remnants of a fluvial delta, inlet and outlet valleys, and infill deposits containing diverse carbonate, mafic, and hydrated minerals. Prior to the launch of the Mars 2020 mission, members of the Science Team collaborated to produce a photogeologic map of the Perseverance landing site in Jezero crater.

Development and Testing of Responsive Feeding Counseling Cards to Strengthen the UNICEF Infant and Young Child Feeding Counseling Package.

Background: The UNICEF Community-based Infant and Young Child Feeding Counseling Package (C-IYCFCP) currently has limited responsive feeding (RF) content, thus limiting dissemination of RF messages within infant and young child feeding (IYCF) counseling.

Objectives: This project ) developed counseling cards based on existing evidence-based RF guidelines and ) tested their feasibility in Ghana.

Methods: Five RF counseling cards were developed focusing on eating with family; introducing new foods; hunger/satiety cues; food texture; and calming a child.

Skeletal effects of plyometric exercise and metformin in ovariectomized rats.

Estrogen deficiency causes bone loss and skeletal muscle dysfunction, and attenuates the musculoskeletal effects of exercise. The anti-diabetic drug metformin has been suggested to promote beneficial skeletal effects. To explore whether metformin can improve musculoskeletal training response during estrogen deficiency, we investigated the skeletal effects of plyometric exercise and metformin, in an ovarectomized (OVX) rat model of osteoporosis.

Relationship between fMRI response during a nonverbal memory task and marijuana use in college students.

Marijuana (MJ) is widely used among college students, with peak use between ages 18-22. Research suggests memory dysfunction in adolescent and young adult MJ users, but the neural correlates are unclear. We examined functional magnetic resonance imaging (fMRI) response during a memory task among college students with varying degrees of MJ involvement.

Electron Transfer Strategies Regulate Carbonate Mineral and Micropore Formation.

Some microbial carbonates are robust biosignatures due to their distinct morphologies and compositions. However, whether carbonates induced by microbial iron reduction have such features is unknown. Iron-reducing bacteria use various strategies to transfer electrons to iron oxide minerals (e.

Microbialite Biosignature Analysis by Mesoscale X-ray Fluorescence (μXRF) Mapping.

As part of its biosignature detection package, the Mars 2020 rover will carry PIXL, the Planetary Instrument for X-ray Lithochemistry, a spatially resolved X-ray fluorescence (μXRF) spectrometer. Understanding the types of biosignatures detectable by μXRF and the rock types μXRF is most effective at analyzing is therefore an important goal in preparation for in situ Mars 2020 science and sample selection. We tested mesoscale chemical mapping for biosignature interpretation in microbialites.

Trauma Simulation Training Increases Confidence Levels in Prehospital Personnel Performing Life-Saving Interventions in Trauma Patients.

Introduction. Limited evidence is available on simulation training of prehospital care providers, specifically the use of tourniquets and needle decompression. This study focused on whether the confidence level of prehospital personnel performing these skills improved through simulation training.

Antibiotic Policies and Utilization in Oregon Hospice Programs.

Antibiotics are frequently used in hospice care, despite limited data on safety and effectiveness in this patient population. We surveyed Oregon hospice programs on antibiotic policies and prescribing practices. Among 39 responding hospice programs, the median reported proportion of current census using antibiotics was 10% (interquartile range = 3.

Promotion and nucleation of carbonate precipitation during microbial iron reduction.

Iron-bearing early diagenetic carbonate cements are common in sedimentary rocks, where they are thought to be associated with microbial iron reduction. However, little is yet known about how local environments around actively iron-reducing cells affect carbonate mineral precipitation rates and compositions. Precipitation experiments with the iron-reducing bacterium Shewanella oneidensis MR-1 were conducted to examine the potential role of cells in promoting precipitation and to explore the possible range of precipitate compositions generated in varying fluid compositions.

Environmental controls on photosynthetic microbial mat distribution and morphogenesis on a 3.42 Ga clastic-starved platform.

Three morphotypes of microbial mats are preserved in rocks deposited in shallow-water facies of the 3.42 Ga Buck Reef chert (BRC). Morphotype alpha consists of fine anastomosing and bifurcating carbonaceous laminations, which loosely drape underlying detrital grains or form silica-filled lenses.

Oxygen and hydrogen isotope evidence for a temperate climate 3.42 billion years ago.

Stable oxygen isotope ratios (delta(18)O) of Precambrian cherts have been used to establish much of our understanding of the early climate history of Earth and suggest that ocean temperatures during the Archaean era ( approximately 3.5 billion years ago) were between 55 degrees C and 85 degrees C (ref. 2).