Nancy Calisto

Nancy Calisto
University of Magallanes | UMAG

About

15
Publications
3,021
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331
Citations
Citations since 2017
10 Research Items
268 Citations
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2017201820192020202120222023010203040506070
2017201820192020202120222023010203040506070
2017201820192020202120222023010203040506070

Publications

Publications (15)
Article
Full-text available
The sustained decrease in the availability of new antimicrobial molecules for thera peutic use in recent decades and the large increase in microorganisms resistant to these compounds makes it necessary to search for new substances with antimicrobial properties. Extreme environments, where there is little availability of nutrients, are favorable sce...
Article
Full-text available
Carotenoids are highly important in pigmentation, and its content in farmed crustaceans and fish correlates to their market value. These pigments also have a nutritional role in aquaculture where they are routinely added as a marine animal food supplement to ensure fish development and health. However, there is little information about carotenoids...
Article
Full-text available
In this study, 50 bacterial isolates from pristine Antarctic soil samples from King George and Greenwich Islands (South Shetland Islands) and 25 bacterial isolates from the rhizosphere of Deschampsia antarctica Desv, were characterized for their antimicrobial activity and response to 21 antibiotics. Antibiotic susceptibility was assayed following t...
Chapter
Full-text available
This paper presents the results of a survey focused on the evaluation of an academic training course related to the different pedagogical aspects that influence the training of engineers seeking to improve the quality of teaching and the academic training in the engineering faculties of three Chilean universities (Universidad Autónoma de Chile, Uni...
Article
The presence of heavy metals in Antarctica is an emerging issue as human influence becomes more discernible over the years. The study of pollution in Antarctica can help people to understand the real influence of human activities on the environmental pollution from polar regions. Bioremediation of petroleum hydrocarbons in the polar environment whe...
Article
Full-text available
The potential presence of introduced antibiotics in the aquatic environment is a hot topic of concern, particularly in the Antarctic, a highly vulnerable area protected under the Madrid protocol. The increasing presence of human population, especially during summer, might led to the appearance of pharmaceuticals in wastewater. The previous discover...
Article
Antimicrobial resistant bacteria are widespread in aquatic environments. The aim of the present study was to obtain information on the occurrence of bacteria with antimicrobial resistance in seawater surrounding Antarctic stations. Escherichia coli strains were isolated from seawater. The samples were collected from sites distributed around the sew...
Article
Full-text available
Antibiotic resistance is a problem of global concern and is frequently associated with human activity. Studying antibiotic resistance in bacteria isolated from pristine environments, such as Antarctica, extends our understanding of these fragile ecosystems. Escherichia coli strains, important fecal indicator bacteria, were isolated on the Fildes Pe...
Article
Full-text available
Escherichia coli bacteria with extended-spectrum β-lactamase (ESBL) type CTX-M resistance were isolated from water samples collected close to research stations in Antarctica. The isolates had blaCTX-M-1 and blaCTX-M-15 genotypes and sequence types (ST) indicative of a human-associated origin. This is the first record of ESBL-producing enterobacteri...
Article
Full-text available
Samples of four different species of seaweed were collected monthly between October 2000 and March 2001 from the coast of the Strait of Magellan, Chile to establish baseline levels of trace metals (silver, total mercury, nickel, lead, antimony, vanadium and zinc) and to compare the accumulation capacity among species. The algae included in the stud...
Article
Full-text available
The oxidation of D-glucitol and D-mannitol by CrVI yields the aldonic acid (and/or the aldonolactone) and CrIII as final products when an excess of alditol over CrVI is used. The redox reaction occurs through a CrVICrVCrIII path, the CrVICrV reduction being the slow redox step. The complete rate laws for the redox reactions are expressed by: a) −d[...

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Projects

Project (1)
Project
The Technische Universität Dresden, Faculty of Education, The Universidad de Magallanes, Faculty of Engineering, The Universidad de Talca, Faculty of Engineering, and The Universidad Autónoma de Chile, Faculty of Engineering, collaborate in the research and development project "Engineering Didactics at Chilean Universities". The aim of the project is the development and testing of training modules for teaching qualifications of teaching staff in academic engineering education. The project is financially supported by the German Academic Exchange Service (DAAD) as part of the program "Subject-related University Partnerships".