Navegar por los elementos (20655 total)

La biodiversidad cultivada es un elemento clave para la conservación de agroecosistemas sostenibles que debe abordarse tanto desde una perspectiva ecológica como también desde una perspectiva social. Ambos componentes, natural y social, se conjugan…

Objective: analysis of the incidence of SARS, influenza and determining the etiological structure of influenza in the Republic of Sakha (Yakutia), and in particular, in the Arctic zone of the Republic.Materials and methods: we used data from the…

The COVID-19 pandemic has caused unforeseen and extreme changes in societal and health system functioning not previously experienced in most countries in a lifetime. The impact of the pandemic on clinical trials can be especially profound given their…

The aim of the study was to investigate the characteristics of adaptation of orphanages on the basis of the findings of a comprehensive study of the components of this phenomenon and develop a mathematical model of evaluation of the current state of…

A study on the spatial distribution of the major weeds in maize was carried out in 2007 and 2008 in a field located in Golegã (Ribatejo region, Portugal). The geo-referenced sampling focused on 150 points of a 10 x 10 m mesh covering an area of 1.5…

Las especies de Quercus son especialmente vulnerables durante las fases iniciales de su ciclo regenerativo debido a la limitación impuesta por un conjunto de factores, que podrían llegar a poner en riesgo la persistencia de sus poblaciones y alterar…

We have investigated how edge effects influence the fern community of Jaguarão Forest (08º 35' 49' S and 35º 15' 39' W), located in the district of Rio Formoso, Pernambuco, Brazil. A comparative analysis was made of the interior and edge of the…

Abstract The COVID-19 pandemic has produced a flurry of online activity on social media sites. As such, analysis of social media data during the COVID-19 pandemic can produce unique insights into discussion topics and how those topics evolve over the…

Coronaviruses are positive-stranded RNA viruses that infect a variety of hosts, resulting in a range of symptoms from gastrointestinal illness to respiratory distress. Bats are reservoirs for a high diversity of coronaviruses, and focused…

Interest in coronaviruses because of the 2019 novel coronavirus (SARS-CoV-2) pandemic has generated concern about their occurrence and persistence in aquatic habitats. Coronaviruses are not quantitatively significant constituents of marine…