Camila Coronel - Academia.edu (original) (raw)

Papers by Camila Coronel

Facultad de Medicina, Mar 8, 2021

Current production costs of microalgal biomass indicate that only highly-productive cultivation f... more Current production costs of microalgal biomass indicate that only highly-productive cultivation facilities will approach commercial feasibility. Geographical site selection for siting those facilities is critical for achieving target productivities. The aim of this study was to provide a semi-empirical estimation of microalgal biomass and lipids productivity in South America. Simulated-climate was programed in environmental photobioreactors (PhenometricsTM) for a simulation of cultivation in open raceway ponds at different geographical sites. The mean annual South American biomass productivity of 20-cm deep ponds was 12 ± 4 g · m- 2 · d-1. The most productive regions were clustered in the subtropical and tropical regions of the continent. Fortaleza (Brazil) showed a low seasonality and a high annual mean productivity of 23 g · m-2 · d-1 in 5-cm deep ponds. Lipids accumulation and productivity in Fortaleza showed a high microalgal oil accumulation up to 46% (w/w) and a maximum oil pr...

Biotechnology Journal, 2021

Current production costs of microalgal biomass indicate that only highly‐productive cultivation f... more Current production costs of microalgal biomass indicate that only highly‐productive cultivation facilities will approach commercial feasibility. Geographical site selection for siting those facilities is critical for achieving target productivities. The aim of this study was to provide a semi‐empirical estimation of microalgal biomass and lipids productivity in South America.

Algal Research, 2020

Microalgal biomass is increasingly considered a promising feedstock for the production of bioetha... more Microalgal biomass is increasingly considered a promising feedstock for the production of bioethanol because it has simpler biochemical composition and structural features than plant feedstocks. However, it still requires hazardous and/or expensive acid or enzymatic saccharification processes before its conversion into ethanol by fermentation. To bypass this limitation, we identified microalgal strains that accumulate up to 10% (w/w) of sucrose, a readily fermentable sugar. Conditions were optimized to produce sucrose in half-strength seawater, as well as efficient extraction by very mild procedures, and conversion into ethanol. We present a model based on cultivation in environmental photobioreactors that predicted a productivity of 4200 L ethanol•ha −1 •year −1 in raceway ponds in Brazil, approaching the average sucrose and ethanol productivity from sugarcane.

Principles and Applications of Fermentation Technology, 2018

Fil: Sanz Smachetti, Maria Eugenia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. C... more Fil: Sanz Smachetti, Maria Eugenia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mar del Plata. Instituto de Investigaciones en Biodiversidad y Biotecnologia; Argentina

Journal of Cleaner Production, 2019

A semi-closed loop microalgal biomass production-platform for ethanol from renewable sources of n... more A semi-closed loop microalgal biomass production-platform for ethanol from renewable sources of nitrogen and phosphorous

Bioresource Technology Reports, 2018

It is generally assumed that increased microalgal biomass productivity on any particular geograph... more It is generally assumed that increased microalgal biomass productivity on any particular geographical site would be most likely achieved by strains native to that region. However, direct assessment of that hypothesis remains challenging. Here we isolated and biochemically characterized twenty-six microalgal strains from one of the regions with the highest irradiances of the planet. Biomass and lipids productivity of phylogenetically-close Scenedesmus strains native to regions of contrasting irradiances performed similarly under laboratory culture conditions. Culture simulations in environmental photobioreactors, mimicking regional weather conditions, broadly showed physiological responses of these strains according to their origin. However, under the mean weather conditions of a predicted highly productive region, an exotic strain from a lower irradiance zone resulted 40% more productive than a phylogenetically close-relative native strain. These results challenge the generalized view of the convenience of using native microalgae to increase productivity and broadens the discussion towards alternative scenarios.

Revista Boliviana De Quimica, 2011

A set of vegetable oils from Bolivian rain forests have been converted into biodiesel by base-cat... more A set of vegetable oils from Bolivian rain forests have been converted into biodiesel by base-catalyzed transesterification of fatty acids. Data regarding biodiesel properties dealing with feasibility of quality control procedures were obtained. Biodiesels have dynamic viscosity values in the range from 5.29 to 8.24 mPa.s at 20°C, and viscosity temperature dependences up to 90°C obey exponential functions. Dielectric constant values are between 3.75 and 4.34, whereas for diesel fuel is 2.35 ± 0.25. Measured diesel fuel density is 0.857 ± 0.015 g/cm³ at 20°C, while biodiesel densities are about 0.879 g/cm³. Temperature dependent specific gravity changes gave linear behavior between 20°C and 80°C. Heats of combustion values expressed in kJ/g are in the range 46.37-55.56 and a value of 49.42±2.20 for diesel fuel as reference. Measured differences do not depend on oils composition and could be attributed to the synthesis procedure. Neither water nor glycerol effects has been detected as meaningful impurities. Biodiesel-diesel fuel standard mixtures gave straight lines as calibration procedure to quantify biodiesel by infrared spectroscopy.

J Mol Catal B Enzym, 2011

Several strains of endophytic bacteria and yeast were isolated from Daucus carota, Erythrina cris... more Several strains of endophytic bacteria and yeast were isolated from Daucus carota, Erythrina crista-galli, Curcubita maxima and Fortunella margarita, and tested for the reduction of two model α-alkyl-β-ketoesters. The yeast strains resulted better biocatalysts for the reduction of the tested substrates with the exception of Enterobacter agglomerans C8 strain, isolated from Erythrina crista-galli, that provided the best results for the preparation of syn (2R,3S) α-alkyl β-hydroxyesters. Among the isolated yeast strains, the Pichia sp. strain isolated from D. carota, was the best biocatalyst for production of anti (2S,3S) α-alkyl β-hydroxyesters. Our results show that the microbial endophytic community provides an interesting niche on the search for novel biocatalysts.► Endophytic microorganisms as a source for novel biocatalysts. ► β-keto esters were used to test their biocatalytic potential. ► Endophytic yeast showed the greatest potential as bioreducing agents. ► Pichia strain isolated from Daucus carota showed excellent yield and stereoselectivity. ► Enterobacter agglomerans from Erythrina crista-galli showed excellent yield and stereoselectivity.

Journal of Molecular Catalysis B: Enzymatic, 2014

Five endophytic yeast strains isolated from edible plants were tested in the reduction β-chloroan... more Five endophytic yeast strains isolated from edible plants were tested in the reduction β-chloroand β-azidopropiophenone for the preparation of optically active fluoxetine precursors. The biotransformation rendered not only the corresponding chiral γ-substituted alcohols, but also unsubstituted alcohols and ketones. The product profile was studied and a plausible mechanism for the reductive elimination of the β-functional group is proposed.

Journal of Molecular Catalysis B: Enzymatic, 2011