Microbial biogeography along a 2578 km transect on the East Antarctic Plateau.

Microorganisms are present in snow/ice of the Antarctic Plateau, but their biogeography and metabolic state under extreme local conditions are poorly understood. Here, we show the diversity and distribution of microorganisms in air (1.5 m height) and snow/ice down to 4 m depth at three distant latitudes along a 2578 km transect on the East Antarctic Plateau on board an environmentally friendly, mobile platform.

Phosphorus addition diminishes the negative effect of nitrogen addition on methane sink in subtropical forest soils.

Increased global nitrogen (N) and phosphorus (P) inputs caused by human activities can significantly impact methane (CH) uptake in terrestrial ecosystems. Forest soils, as the largest CH sink among terrestrial ecosystems, play a crucial role in mitigating global warming. However, the effects of long-term N and P additions on CH sink and the associated microbial mechanisms in subtropical forest soils remain unclear.

Extraction of Purple Prickly Pear () Mucilage by Microfiltration, Composition, and Physicochemical Characteristics.

Mucilages are valuable to the food industry, but the solvents used to extract and concentrate them are detrimental to the environment. Therefore, environmentally friendly technologies that preserve the properties of biopolymers and reduce the use of solvents are being sought. In this work, the mucilage of (mesocarp-endocarp) was extracted by two methods: In the first one, the pulp from the mesocarp-endocarp was extracted by ethanol precipitation and centrifugation cycles, then dried at room temperature.

[Characteristics of melanoma in Mexicans seen at "La Raza" National Medical Center].

Background: Melanoma is the third most common type of skin cancer in Mexico and represents 75% of skin cancer deaths. Dermoscopy is a diagnostic tool that increases early detection of melanoma compared to naked eye examination.

Objective: The aim of this study was to describe the clinical, dermoscopic and histological characteristics of patients with a confirmed diagnosis of cutaneous melanoma treated at the "La Raza" National Medical Center.

Dynamics of Ischemia/Reperfusion Injury Markers During Normothermic Liver Machine Perfusion.

Background: A comprehensive mechanistic assessment of normothermic machine perfusion (NMP) is an essential step toward identifying biomarkers to assess liver viability. Although some studies have evaluated the effect of NMP on inflammation markers, there are other key pathological mechanisms involved in ischemia/reperfusion injury (IRI) that have not yet been evaluated.

Methods: Eight human donor livers preserved by NMP were included to analyze IRI during preservation.

Sea spray allows for the growth of subaerial microbialites at the driest desert on Earth.

Due to its extreme conditions, microbial life in the Atacama Desert is known to survive in well-protected micro-habitats (hypolithic, endolithic, etc.), but rarely directly exposed to the environment, that is, epilithic habitats. Here we report a unique site, La Portada, a cliff confronting the Pacific Ocean in the Coastal Range of this desert, in which the constant input of water provided by the sea spray allows for the growth of a black-colored epilithic subaerial microbial ecosystem.

[Prescription of drugs for smoking cessation. Retrospective analysis of the health area of Zamora].

Objective: To analyze the prescription of drugs to aid smoking cessation and to detect whether there are differences by age or sex.

Design: Retrospective cohort study. SITE: Zamora Health Area.

Highly (regio)selective hydroformylation of olefins using self-assembling phosphines.

New phosphines with self-assembling 6-pyridinone moities were prepared, characterized, and examined in the hydroformylation of diverse olefins. Testing various known and novel ligands in the presence of [Rh(acac)(CO)] under industrially relevant conditions, the hydroformylation of 1-octene proceeds best with 6,6'-(phenylphosphanediyl)bis(pyridin-2(1)-one) (DPONP). Control experiments and modelling studies indicate dimerization of this ligand at higher temperatures (>100 °C).

Drivers of biogenic volatile organic compound emissions in hygrophytic bryophytes.

Bryophytes can both emit and take up biogenic volatile organic compounds (BVOCs) to and from the environment. Despite the scarce study of these exchanges, BVOCs have been shown to be important for a wide range of ecological roles. Bryophytes are the most ancient clade of land plants and preserve very similar traits to those first land colonisers.

Fungal composition associated with host tree identity mediates nutrient addition effects on wood microbial respiration.

Fungi are key decomposers of deadwood, but the impact of anthropogenic changes in nutrients and temperature on fungal community and its consequences for wood microbial respiration are not well understood. Here, we examined how nitrogen and phosphorus additions (field experiment) and warming (laboratory experiment) together influence fungal composition and microbial respiration from decomposing wood of angiosperms and gymnosperms in a subtropical forest. Nutrient additions significantly increased wood microbial respiration via fungal composition, but effects varied with nutrient types and taxonomic groups.

Effectiveness of gamification in nursing degree education.

Background: Previous research in nursing has found favorable results from the use of teaching methodologies alternative to lectures. One of the complementary methodologies used for university teaching is gamification, or the inclusion of game elements, creating a dynamic learning environment that allows the acquisition of knowledge and the development of other skills necessary for nursing students. The purpose of this study was to evaluate the effect of a gamification session on student satisfaction and knowledge scores in nursing students in simulated laboratory practice.

Applying the Modified Ten-Group Robson Classification in a Spanish Tertiary Hospital.

Background: Caesarean section is necessary to save the lives of mothers and newborns at times, but it is important to perform it only when it is essential due to all the risks involved. This study aimed to examine the rate of caesarean sections performed at a tertiary hospital using the Robson classification to detect methods for the detection of and/or reduction in these caesarean section rates.

Methods: A descriptive, cross-sectional study of a retrospective database was carried out.

Biosignature Detection and MinION Sequencing of Antarctic Cryptoendoliths After Exposure to Mars Simulation Conditions.

In the search for life in our Solar System, Mars remains a promising target based on its proximity and similarity to Earth. When Mars transitioned from a warmer, wetter climate to its current dry and freezing conditions, any putative extant life probably retreated into habitable refugia such as the subsurface or the interior of rocks. Terrestrial cryptoendolithic microorganisms ( those inhabiting rock interiors) thus represent possible modern-day Mars analogs, particularly those from the hyperarid McMurdo Dry Valleys in Antarctica.

Dark-field and directional dark-field on low-coherence x ray sources with random mask modulations: validation with SAXS anisotropy measurements.

Phase-contrast imaging, dark-field, and directional dark-field imaging are recent x ray imaging modalities that have been demonstrated to reveal different information and contrast from those provided by conventional x ray imaging. Access to these new types of images is currently limited because the acquisitions require coherent sources such as synchrotron radiation or complicated optical setups. This Letter demonstrates the possibility of efficiently performing phase-contrast, dark-field, and directional dark-field imaging on a low-coherence laboratory system equipped with a conventional x ray tube, using a simple, fast, and robust single-mask technique.

Mediterranean springs: Keystone ecosystems and biodiversity refugia threatened by global change.

Mediterranean spring ecosystems are unique habitats at the interface between surface water and groundwater. These ecosystems support a remarkable array of biodiversity and provide important ecological functions and ecosystem services. Spring ecosystems are influenced by abiotic, biotic, and anthropogenic factors such as the lithology of their draining aquifers, their climate, and the land use of their recharge area, all of which affect the water chemistry of the aquifer and the spring discharges.

Chronic Diarrhea Due to in an Immunosuppressed Patient with a Pancreas-Kidney Transplant.

The genus belongs to the family. A patient with a pancreas-kidney transplant had multiple episodes of abdominal sepsis after surgery. was isolated in the ascitic and biliary fluid drains.

Identification of volatile organic compounds and their sources driving ozone and secondary organic aerosol formation in NE Spain.

Volatile organic compounds (VOCs) play a crucial role in the formation of ozone (O) and secondary organic aerosol (SOA). We conducted measurements of VOC ambient mixing ratios during both summer and winter at two stations: a Barcelona urban background station (BCN) and the Montseny rural background station (MSY). Subsequently, we employed positive matrix factorization (PMF) to analyze the VOC mixing ratios and identify their sources.

Chlorophyll fluorescence variation in two Mediterranean forest species over a 21-year drought treatment period.

The Mediterranean is among the regions predicted to be most affected by climate change due to rising temperatures and increasing frequency as well as intensity of extreme weather events, such as drought. These shifts in climatic conditions might lead to changes in species community composition by enabling the increase of drought-tolerant species at the expense of less tolerant ones. This hypothesis was tested in the current study using chlorophyll fluorescence data from a 21-year precipitation exclusion experiment in a Mediterranean forest for two co-dominant Quercus ilex L.

The essential role of biodiversity in the key axes of ecosystem function.

Biodiversity is essential for maintaining the terrestrial ecosystem multifunctionality (EMF). Recent studies have revealed that the variations in terrestrial ecosystem functions are captured by three key axes: the maximum productivity, water use efficiency, and carbon use efficiency of the ecosystem. However, the role of biodiversity in supporting these three key axes has not yet been explored.

Outbreak of Arcobacter butzleri? An emerging enteropathogen.

Background: Arcobacter butzleri is a gram-negative rod, with microaerobic growth at an optimal temperature of 37°C. It was reported to be the fourth most common Campylobacter-like organism isolated from patients with diarrhoea.

Objective: Characterise a potential outbreak of A.

Virulence genes of Aeromonas spp. isolates from stool in Spain.

Introduction: The role of Aeromonas species in gastrointestinal disease is controversial. The aim was to analyze not only the virulence genes between different species of Aeromonas isolated from feces, but the distribution of these virulence genes between enterotoxigenic strains and co-pathogen strains.

Methods: Retrospective study of isolates of Aeromonas spp.