A5078608574- Microbial Community Ecology and Physiology
- SARS-CoV-2 detection and testing
- Catalysis and Hydrodesulfurization Studies
- SARS-CoV-2 and COVID-19 Research
- Bacterial Genetics and Biotechnology
- Microbial Metabolic Engineering and Bioproduction
- Probiotics and Fermented Foods
- COVID-19 epidemiological studies
- Microbial bioremediation and biosurfactants
- Methane Hydrates and Related Phenomena
- Industrial Gas Emission Control
- Catalytic Processes in Materials Science
- Pharmaceutical and Antibiotic Environmental Impacts
- Metal Extraction and Bioleaching
- Pesticide and Herbicide Environmental Studies
- Food composition and properties
- Biosensors and Analytical Detection
- Catalysis for Biomass Conversion
- Polar Research and Ecology
- Microbial Fuel Cells and Bioremediation
- Marine Bivalve and Aquaculture Studies
- Microplastics and Plastic Pollution
- Advanced Statistical Process Monitoring
- Gut microbiota and health
- Bacterial biofilms and quorum sensing
University of Valparaíso
2008-2023
Valparaiso University
2010-2014
Federico Santa María Technical University
2008
Universidad Autónoma de Madrid
2002-2004
Centro Nacional de Biotecnología
2002
Pontificia Universidad Católica de Valparaíso
2002
Summary Biosurfactants are produced by hydrocarbon‐degrading marine bacteria in response to the presence of water‐insoluble hydrocarbons. This is believed facilitate uptake hydrocarbons bacteria. However, these diffusible amphiphilic surface‐active molecules involved several other biological functions such as microbial competition and intra‐ or inter‐species communication. We report isolation characterization a bacterial strain identified C obetia sp. MM1IDA2H ‐1, which can grow using...
ABSTRACT Expression of the alkane degradation pathway encoded by OCT plasmid Pseudomonas putida GPo1 is regulated two control systems. One relies on transcriptional regulator AlkS, which activates expression in presence alkanes. The other, a dominant global regulation control, represses genes when preferred carbon source present growth medium addition to This catabolite repression occurs through poorly characterized mechanism that ultimately regulates transcription from AlkS-activated...
Expression of the genes alkane degradation pathway encoded in Pseudomonas putida OCT plasmid are subject to negative and dominant global control depending on carbon source used physiological status cell. We investigated signals responsible for this chemostat cultures under conditions nutrient or oxygen limitation. Our results show that is not related growth rate responds two different signals. One signal concentration generates repressing effect (true catabolite repression control). The...
Plant-microbiota interactions have significant effects on plant growth, health, and productivity. Rhizosphere microorganisms are involved in processes that promote physiological responses to biotic abiotic stresses plants. In recent years, the interest improve productivity has increased, mainly aiming find promising strains overcome impact of climate change crops. this work, we hypothesize given desertic environment Antarctic Atacama Desert, different species inhabiting these areas might...
This study proposes an extension of Seasonal Autoregressive Integrated Moving Average models with exogenous regressors (SARIMAX) by incorporating skew-normal and zero-inflated error structures to better accommodate asymmetry excess zeros in time series data. The proposed framework demonstrates improved flexibility robustness compared traditional Gaussian-based models. Simulation experiments reveal that the skewness parameter significantly affect forecasting accuracy, reductions mean absolute...
A novel acidophilic member of the phylum Actinobacteria was isolated from an acidic, metal-contaminated stream draining abandoned underground coal mine (Trongol mine), situated close to Curanilahue, Biobío Region, Chile. The isolate (USS-CCA1T) demonstrated be a heterotroph that catalysed under aerobic conditions oxidation ferrous iron and reduction ferric anaerobic conditions, but not sulfur nor hydrogen. USS-CCA1T is Gram-positive, motile, short rod-shaped, mesophilic bacterium with...
Kefir beverage is a probiotic food associated with health benefits, containing microorganisms and biomolecules produced during fermentation. The microbial composition of these beverages varies among countries, geographical regions, the substrates, therefore, characterization kefir great relevance in understanding their potential health-promoting biotechnological applications. Therefore, this study presents metagenomic functional two Chilean beverages, K02 K03, through shotgun amplicon-based...
We formulate ill-posedness of inverse problems estimation and prediction Coronavirus Disease 2019 (COVID-19) outbreaks from statistical mathematical perspectives. This is by nature a stochastic problem, since e.g., random perturbation in parameters can cause instability prediction. leaves us with plenty possible regularizations, thus generating plethora sub-problems. mention as examples stability sensitivity peak estimation, starting point exponential growth curve, or SIR...
The extensive use of s-triazine herbicides in diverse countries causes environmental and health concern.Simazine atrazine are s-triazines widely used agriculture forestry.Although, natural dissipation soils by physicochemical processes has been described, the main mechanism for their removal is biological degradation microorganisms.Bioremediation a successful strategy soil.For bioaugmentation processes, s-triazine-degrading bacteria required, which isolation from agricultural was described...
As COVID-19 is spreading, national agencies need to monitor and track several metrics. Since we do not have perfect testing programs on the hand, one needs develop an advanced sampling strategies for prevalence study, control management. Here introduce REDACS: Regional emergency-driven adaptive cluster effective management justify its usage COVID-19. We show advantages over classical massive individual plans. also point out how regional spatial heterogeneity underlines proper sampling....
Biocatalyst systems based on biofilms were developed to remove nitrogen and sulfur-containing heterocyclic hydrocarbons using Cobetia sp. strain MM1IDA2H-1 Rhodococcus rhodochrous. The curli overproducers mutants CM1 CM4 derived from used build monostrain quinoline; together with R. rhodochrous simultaneously quinoline dibenzothiophene mixed biofilms. removal 96% 97% or respectively, whereas bacterial suspensions assays yielded 19% 24% the same strains. At other hand, simultaneous of...
A simple bacteriological analysis for accompanying culturable microflora from different regions of the body Argopecten purpuratus showed a rather atypical bacteria considering that farming is done in sea-water column.High numbers Vibrio strains, Gram-positive cocci, and sporeformers were present.Also members Enterobacteriaceae family isolated.
ABSTRACT Cobetia sp. strain MM1IDA2H-1 is a marine bacterium isolated from seawater samples that uses the heterocyclic aromatic hydrocarbon dibenzothiophene as sole carbon source and produces biosurfactant inhibits bacterial quorum sensing. The genome was sequenced, processed, assembled, annotated for basic applied studies.
The Quintero Bay, located along the central coast of Chile, has suffered different oil spills during past 5 years, impacting marine ecosystems. This report describes microbial community structure seawater samples obtained from Bay through 16S rRNA amplicon sequencing.
Kefir is an ancestral food produced using microbial consortia whose composition varies depending on the geographical origin and substrate used for fermentation. This dairy beverage considered a probiotic food, its consumption has been associated with several health benefits. report describes isolation of bacterial strains from Chilean kefir.