http://hdl.handle.net/11336/364 Articulos de INSTITUTO DE MICOLOGIA Y BOTANICA Sun, 10 Mar 2024 04:55:27 GMT 2024-03-10T04:55:27Z http://hdl.handle.net/11336/229824 Circular economy of native Euphorbiaceae: From second-generation biodiesel production to animal food. Taking advantage of marginal lands Prucca, Cesar German; Fracchia, Sebastian; Eimer, Griselda Alejandra; Ferrero, Gabriel Orlando Biodiesel emerges as the renewable fuel that best suits the requirements of diesel vehicles. However, the dichotomy "food versus energy," that is, the allocation of resources to increase the energy matrix to the detriment of food generation and the advance of the agricultural frontier on native flora generating deforestation, are the current challenges of the science. This work aimed to evaluate the replacement of conventional oils to biodiesel production with inedible oils obtained from the seeds of four native species of Euphorbiaceae in Argentina. This type of plant grows in arid or semi-arid soils with a low rainfall regime, and therefore their cultivation areas do not coincide, nor compete, with those of the crop destined for traditional agri-foods, resulting in this a significant advantage. To produce second-generation biodiesel with unconventional oils, a heterogeneous enzymatic catalyst based on the biosilicification of the enzyme lipase from Pseudomonas fluorescens, was used. This strategy facilitates the stages of purification and subsequent reuse, employing oils with high free fatty acid (FFA) content and the potentiality of being used in batch or continuous systems. Additionally, the nutritional value of the expeller (cake) of each species obtained from the oil extraction was evaluated in mice. In this way, a sustainable model is proposed where the ?food vs. energy? dichotomy is satisfied. Sun, 01 Jan 2023 00:00:00 GMT http://hdl.handle.net/11336/229824 2023-01-01T00:00:00Z http://hdl.handle.net/11336/229481 Improving agarics usability and sampling in conservation assessments Romano, Gonzalo Matías; Lechner, Bernardo Ernesto; Greslebin, Alina Gabriela Species are not equally detectable, and this should be considered at the moment of choosing ecological indicators and considering sampling efforts. Indices that permit ranking gilled species according to their abundance, permanency and basidiome features were constructed. The same indices were used to evaluate sampling effort and efficiency: more than two hours of continuous work negatively affects the capability of finding less detectable species. Ranking species is a practical solution to organize abundance datasets and can be easily applied to find patterns of species relevance and detectability to better understand our findings and even to ensure optimum fieldwork efficiency. Wed, 01 Nov 2023 00:00:00 GMT http://hdl.handle.net/11336/229481 2023-11-01T00:00:00Z http://hdl.handle.net/11336/228573 Alternaria toxins in tomato products from the Argentinean market Maldonado Haro, María Luisa; Cabrera, Gabriela Myriam; Fernández Pinto, Virginia; Patriarca, Andrea Rosana Although Alternaria toxins are still considered emerging, their occurrence has been reported in different food, both commodities and raw materials. Tomato products have been identified among the most relevant contributors to human exposure to these toxins. However, no current data are available on their incidence in tomato products in Argentina. A total of 79 samples were collected from the Argentinean market during 2019–2021, including tomato puree, whole peeled tomatoes, crushed tomatoes, concentrated tomato paste, tomato sauce, and tomato pulp. Six Alternaria toxins, altenuene (ALT), alternariol (AOH), alternariol monomethyl ether (AME), altertoxin-I (ATX-I), tentoxin (TEN), and tenuazonic acid, were quantified by HPLC-MS. Natural occurrence of at least one of the toxins was observed in 29 samples. TeA and TEN were the predominant toxins (14%), followed by AOH (13%). A low incidence of ALT (4%), AME (4%) and ATX-I (3%) was detected. TeA was the toxin quantified at the highest levels (211.4–495.7). ATX-I, which is rarely reported in food, was present in 2 samples in relatively high concentrations (146.8 and 233.9 μg/kg). Tomato purees were the products with higher incidence and the only samples contaminated with the six Alternaria toxins. As 11% of the products analysed exceeded the levels recommended by EFSA for AOH and 4% for AME, future risk assessments should be performed to evaluate the consumers’ exposure to these toxins. Mon, 01 May 2023 00:00:00 GMT http://hdl.handle.net/11336/228573 2023-05-01T00:00:00Z http://hdl.handle.net/11336/228421 El Instituto Darwinion celebra a mujeres en la botánica a lo largo de su historia Burgos, Adriana; Cápula, Federico; Elisei, Aldana Mariel; Fernandez, Susana Monica; Ferrero, María de Los Ángeles; Fortunato, Renee Hersilia; Hernandez, Graciela Cristina; Ihasz, Fernanda Vanesa; Kiesling, Roberto; Klusch, Celeste; Mallo, Liliana Cristina; Martinotto, Carla G.; Moreno, Marcelo Alejandro; Mulgura, Maria Ema; Nicola, Marcela Viviana; Palacio, Patricia Candela; Reutemann Arnolfo, Andrea Guadalupe; Rojas, Francisco German; Rúgolo, Zulma Esther; Sabena, Florencia Rocio; Sede, Silvana Mabel; Vega, Andrea Susana Este es nuestro homenaje a las mujeres en la botánica a lo largo de la historia del Instituto de Botánica Darwinion (IBODA/CONICET/ANCEFN), fundado por Cristóbal M. Hicken en 1910 en Villa Progreso (partido de San Martín, Pcia. de Buenos Aires). En 1936 el Darwinion se trasladó a su sede en San Isidro, donde reside actualmente. Con el fin de honrar y visibilizar a las mujeres que han trabajado y trabajan en el Darwinion, hemos recopilado información sobre la labor realizada por cada una de ellas, así como sus roles en el instituto, ya sea como técnicas o personal de apoyo a la investigación, investigadoras, secretarias, bibliotecarias, becarias, entre otros. También se ha tenido en cuenta el período de tiempo durante el cual han desempeñado sus funciones.Para recopilar la información necesaria, examinamos las revistas Darwiniana y Hickenia, las memorias del Darwinion y otros documentos que contienen información acerca del personal. Cuando ha habido vacíos de información, hemos obtenido testimonios directos del personal actual y anterior del Darwinion. En total, se recopiló información sobre más de 160 mujeres.En el siguiente enlace se puede acceder a un archivo con el detalle de cada mujer que trabaja o trabajó en el Darwinion: http://www.darwin.edu.ar/pdf/1689284222-Mas%20de%20160%20mujeres%20Darwinianas_julio2023.pdfDe las más de 160 mujeres, hemos seleccionado a ocho de ellas para rendirles un homenaje especial. Esta selección se basó en su destacada trayectoria, logros significativos y años de trabajo en el instituto. Fri, 01 Dec 2023 00:00:00 GMT http://hdl.handle.net/11336/228421 2023-12-01T00:00:00Z