Congreso Internacional de Responsabilidad Social Apuestas para el desarrollo regional.

Congreso Internacional de Responsabilidad Social: apuestas para el desarrollo regional [Edición 1 / Nov. 6 - 7: 2019 Bogotá D.C.]El Congreso Internacional de Responsabilidad Social “Apuestas para el Desarrollo Regional”, se llevó a cabo los días 6 y 7 de noviembre de 2019 en la ciudad de Bogotá D.C. como un evento académico e investigativo liderado por la Corporación Universitaria Minuto de Dios -UNIMINUTO – Rectoría Cundinamarca cuya pretensión fue el fomento de nuevos paradigmas, la divulgación de conocimiento renovado en torno a la Responsabilidad Social; finalidad adoptada institucionalmente como postura ética y política que impacta la docencia, la investigación y la proyección social, y cuyo propósito central es la promoción de una “sensibilización consciente y crítica ante las situaciones problemáticas, tanto de las comunidades como del país, al igual que la adquisición de unas competencias orientadas a la promoción y al compromiso con el desarrollo humano y social integral”. (UNIMINUTO, 2014). Dicha postura, de conciencia crítica y sensibilización social, sumada a la experiencia adquirida mediante el trabajo articulado con otras instituciones de índole académico y de forma directa con las comunidades, permitió establecer como objetivo central del evento la reflexión de los diferentes grupos de interés, la gestión de sus impactos como elementos puntuales que contribuyeron en la audiencia a la toma de conciencia frente al papel que se debe asumir a favor de la responsabilidad social como aporte seguro al desarrollo regional y a su vez al fortalecimiento de los Objetivos de Desarrollo Sostenible

Congreso Internacional de Responsabilidad Social Apuestas para el desarrollo regional.

Congreso Internacional de Responsabilidad Social: apuestas para el desarrollo regional [Edición 1 / Nov. 6 - 7: 2019 Bogotá D.C.]El Congreso Internacional de Responsabilidad Social “Apuestas para el Desarrollo Regional”, se llevó a cabo los días 6 y 7 de noviembre de 2019 en la ciudad de Bogotá D.C. como un evento académico e investigativo liderado por la Corporación Universitaria Minuto de Dios -UNIMINUTO – Rectoría Cundinamarca cuya pretensión fue el fomento de nuevos paradigmas, la divulgación de conocimiento renovado en torno a la Responsabilidad Social; finalidad adoptada institucionalmente como postura ética y política que impacta la docencia, la investigación y la proyección social, y cuyo propósito central es la promoción de una “sensibilización consciente y crítica ante las situaciones problemáticas, tanto de las comunidades como del país, al igual que la adquisición de unas competencias orientadas a la promoción y al compromiso con el desarrollo humano y social integral”. (UNIMINUTO, 2014). Dicha postura, de conciencia crítica y sensibilización social, sumada a la experiencia adquirida mediante el trabajo articulado con otras instituciones de índole académico y de forma directa con las comunidades, permitió establecer como objetivo central del evento la reflexión de los diferentes grupos de interés, la gestión de sus impactos como elementos puntuales que contribuyeron en la audiencia a la toma de conciencia frente al papel que se debe asumir a favor de la responsabilidad social como aporte seguro al desarrollo regional y a su vez al fortalecimiento de los Objetivos de Desarrollo Sostenible

Characterization and valorization of tropicals microalgae

La biomasse des microalgues tropicales a des vertus naturelles qui peuvent être utilisées dans une large gamme de bioproduits. Leur valorisation peut permettre une production durable et commercialement viable. En effet, les microalgues tropicales représentent une grande biodiversité et bénéficient de conditions environnementales favorables à une production à grande échelle. Dans ce contexte, cette thèse vise à étudier de nouvelles souches tropicales afin de connaître leur potentiel de valorisation dans le domaine des biotechnologies, et plus particulièrement sur trois aspects : énergie, nutraceutique et antifouling. Ce dernier domaine a été étudié dans le cadre du projet ANR-CD2I « BIOPAINTROP » dont l’objectif est la lutte écoresponsable contre le biofouling. Ces travaux s’orientent vers des applications biotechnologiques, mais aussi vers le développement des nouvelles méthodes de caractérisation de l’activité antifouling. Sur les 50 souches étudiées, certaines ont montré la production de métabolites d'intérêt tels que le glycosylglycerol, des lipides de qualité pour la nutraceutique et la production de biodiesel. La souche Amphidinium sp. (P-43) a conduit à un extrait méthanolique possédant une activité biologique significative. Son efficacité dans la lutte contre le biofilm a été démontrée. De plus, l'étude d'écotoxicologie réalisée laisse présager d'un faible impact environnemental.Biomass of tropical microalgae have natural virtues that can be used in a wide range of bioproducts. Their valuation can enable sustainable and commercially viable production. Indeed, tropical microalgae represent a large biodiversity and benefit from favourable environmental conditions for large scale production. In this context, this thesis aims to explore new tropical strains to determine their potential development in the field of biotechnology, particularly in three areas: energy, nutraceutical and antifouling. This field is studied in the project ANR-CD2I "BIOPAINTROP" whose objective is the eco-responsible fight against biofouling. These works target biotechnological applications, but also development of new methods to characterize antifouling activity.Of the 50 strains studied, some have shown interest in the production of metabolites such as glycosyl glycerol, quality nutraceutical and lipids for biodiesel production. The Amphidinium sp. (P-43) stain led to a methanol extract having biological activity of interest. Its efficiency against biofilm was demonstrated. Moreover, the ecotoxicology study has suggested a low environmental impact

Caractérisation et valorisation de microalgues tropicales

Biomass of tropical microalgae have natural virtues that can be used in a wide range of bioproducts. Their valuation can enable sustainable and commercially viable production. Indeed, tropical microalgae represent a large biodiversity and benefit from favourable environmental conditions for large scale production. In this context, this thesis aims to explore new tropical strains to determine their potential development in the field of biotechnology, particularly in three areas: energy, nutraceutical and antifouling. This field is studied in the project ANR-CD2I "BIOPAINTROP" whose objective is the eco-responsible fight against biofouling. These works target biotechnological applications, but also development of new methods to characterize antifouling activity.Of the 50 strains studied, some have shown interest in the production of metabolites such as glycosyl glycerol, quality nutraceutical and lipids for biodiesel production. The Amphidinium sp. (P-43) stain led to a methanol extract having biological activity of interest. Its efficiency against biofilm was demonstrated. Moreover, the ecotoxicology study has suggested a low environmental impact.La biomasse des microalgues tropicales a des vertus naturelles qui peuvent être utilisées dans une large gamme de bioproduits. Leur valorisation peut permettre une production durable et commercialement viable. En effet, les microalgues tropicales représentent une grande biodiversité et bénéficient de conditions environnementales favorables à une production à grande échelle. Dans ce contexte, cette thèse vise à étudier de nouvelles souches tropicales afin de connaître leur potentiel de valorisation dans le domaine des biotechnologies, et plus particulièrement sur trois aspects : énergie, nutraceutique et antifouling. Ce dernier domaine a été étudié dans le cadre du projet ANR-CD2I « BIOPAINTROP » dont l’objectif est la lutte écoresponsable contre le biofouling. Ces travaux s’orientent vers des applications biotechnologiques, mais aussi vers le développement des nouvelles méthodes de caractérisation de l’activité antifouling. Sur les 50 souches étudiées, certaines ont montré la production de métabolites d'intérêt tels que le glycosylglycerol, des lipides de qualité pour la nutraceutique et la production de biodiesel. La souche Amphidinium sp. (P-43) a conduit à un extrait méthanolique possédant une activité biologique significative. Son efficacité dans la lutte contre le biofilm a été démontrée. De plus, l'étude d'écotoxicologie réalisée laisse présager d'un faible impact environnemental

Influence of biocides and algal extracts on adhesion and biofilm formation of marine bacteria

International audienceAny surface immersed in aqueous environment is rapidly colonized by micro and macroscopic organisms [1]. This phenomenon is known as biofouling, which is the origin of complex and recurring point in the global economy and environmental problems. The recent ban of ecotoxic products, used to counteract this phenomenon, generates the interest for research of new antifouling molecules, more environmentally friendly. The objective of this study is to evaluate the potential fouling of microalgae extracts compared to commercial biocides. In this study, the effectiveness of antifouling molecules are evaluated by the adhesion and primary biofilm formation of three pioneering marine bacterial strains. Bacteria were grown at 20 °C. The anti-adhesive activity is evaluated in a static system, by microplates [2] and in a dynamic system, by flow cell. Culture was performed on glass slides in the chambers of the flow cell, adhesion was allowed for 3 hours and a flow of culture environment was applied for up to 48 hours to obtain a biofilm formation. Bacteria are dyed by Syto61 and were observed with a confocal microscopy laser scanning. The effective concentration of commercial biocides, which allows attachment of 50% of bacteria, is between 5 and 18 µM, depending on the bacteria and the biocide. Concerning the extracts of H2O-MeOH (1:1) and MeOH100% of microalgae revealed an inhibition of adhesion and biofilm formation. The microalgal extracts with antifouling activity is analyzed by Hr-MAS to identify the molecules responsible for this activity. The perspectives of this work are to target microalgal strains which can be qualitative sources of biocides withhigh efficiency.This will serve as a basis for developing new antifouling coatings that can be used in temperate and tropical ecosystems

A new method for evaluation of antifouling activity of molecules against microalgal biofilms using confocal laser scanning microscopy-microfluidic flow-cells

WOS:000464485900007Regulatory developments regarding antifouling molecules encourage the search for non-toxic substances. Evaluation tools must evolve to highlight anti-adhesion effects rather than growth inhibition. The work presented here aimed at developing a method based on confocal laser scanning microscopy-microfluidic flow-cells in order to characterize microalgal biofilms. The first part of the work was dedicated to the setting-up of experimental parameters allowing the production of microalgal biofilms. The results obtained showed that it was indeed possible to produce reproducibly biofilms. The size of microalgal strains appeared to be a key-parameter in the adhesion rate and cells adhesion strength. Cylindrotheca closterium cells adhered in lower amount but formed denser biofilms than Porphyridium purpureum. The second part of the work focused on the evaluation of a known antifouling molecule, dibromohemibastadin-1 (DBHB). A comparison with the conventionally used method, multi-well plates experiments, was established. The multi-well plates experiments allowed the determination of minimum inhibitory concentration (MIC) for growth and adhesion inhibition (around 80 mu M). The flow-cells combined with confocal laser scanning microscopy (CLSM) enabled the observation of biofilm, the determination of kinetics parameters of adhesion and an estimation of the adhesion strength

Rapid identification of osmolytes in tropical microalgae and cyanobacteria by 1H HR-MAS NMR spectroscopy

International audienc

Anti-Bacterial Adhesion Activity of Tropical Microalgae Extracts

The evolution of regulations concerning biocidal products aimed towards an increased protection of the environment (e.g., EU Regulation No 528/2012) requires the development of new non-toxic anti-fouling (AF) systems. As the marine environment is an important source of inspiration, such AF systems inhibiting the adhesion of organisms without any toxicity could be based on molecules of natural origin. In this context, the antibiofilm potential of tropical microalgal extracts was investigated. The tropics are particularly interesting in terms of solar energy and temperatures which provide a wide marine diversity and a high production of microalgae. Twenty microalgal strains isolated from the Indian Ocean were studied. Their extracts were characterized in terms of global chemical composition by high resolution magic angle spinning (HR-MAS) and nuclear magnetic resonance (NMR) spectroscopy, toxicity against marine bacteria (viability and growth) and anti-adhesion effect. The different observations made by confocal laser scanning microscopy (CLSM) showed a significant activity of three extracts from Dinoflagellate strains against the settlement of selected marine bacteria without any toxicity at a concentration of 50 μg/mL. The Symbiodinium sp. (P-78) extract inhibited the adhesion of Bacillus sp. 4J6 (Atlantic Ocean), Shewanella sp. MVV1 (Indian Ocean) and Pseudoalteromonas lipolytica TC8 (Mediterranean Ocean) at 60, 76 and 52%, respectively. These results underlined the potential of using microalgal extracts to repel fouling organisms

Fatty Acid Profiling of Tropical Microalgae and CyanobacteriaStrains Isolated From Southwest Indian Ocean Islands

International audienc