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.