Identification of ammonium anomalies by SWIR reflectance spectroscopy: Implications for mining exploration

The existence of ammonium anomalies in mineralized deposits in Argentina is presented. These anomalies are given by the substitution of potassium ion by ammonium ion in certain feldspars, clay minerals and sulfates. This substitution doesn't produce physical changes either in the minerals or the host rocks. Ammonium-bearing minerals have been found in several hydrothermally altered metallic deposits. Ammonium ion is specially sensible to SWIR reflectance spectroscopy method, so it became an ideal, easy and valuable tool for ammonium anomalies detection. Although ammonium-bearing minerals are not always associated with metallic ore, they can be used as an exploration guide, being thus a very useful prospective method for metallic deposits in general. © 2006 Asociación Geológica Argentina.Fil:Godeas, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Litvak, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

La investigación micológica en la Argentina: periodo 1978-2016

In this article, the state of art of the mycology in Argentina is highlighted, with the purpose of reviewing the advances that allowed positioning this discipline worldwide. It reviews the main areas of research, laboratories recognized, and the researchers for the country.En este artículo se presenta el estado del arte de la micología en la Argentina con el propósito de reseñar los avances que permitieron posicionar esta disciplina a nivel mundial. Se presentan las principales áreas de investigación micológica, los laboratorios reconocidos y los investigadores para el país

The micological investigation in Argentina: period 1978-2016

En este artículo se presenta el estado del arte de la micología en la Argentina con el propósito de reseñar los avances que permitieron posicionar esta disciplina a nivel mundial. Se presentan las principales áreas de investigación micológica, los laboratorios reconocidos y los investigadores para el país.In this article, the state of art of the mycology in Argentina is highlighted, with the purpose of reviewing the advances that allowed positioning this discipline worldwide. It reviews the main areas of research, laboratories recognized, and the researchers for the country.Instituto de Botánica "Dr. Carlos Spegazzini

The micological investigation in Argentina: period 1978-2016

En este artículo se presenta el estado del arte de la micología en la Argentina con el propósito de reseñar los avances que permitieron posicionar esta disciplina a nivel mundial. Se presentan las principales áreas de investigación micológica, los laboratorios reconocidos y los investigadores para el país.In this article, the state of art of the mycology in Argentina is highlighted, with the purpose of reviewing the advances that allowed positioning this discipline worldwide. It reviews the main areas of research, laboratories recognized, and the researchers for the country.Instituto de Botánica "Dr. Carlos Spegazzini

The micological investigation in Argentina: period 1978-2016

En este artículo se presenta el estado del arte de la micología en la Argentina con el propósito de reseñar los avances que permitieron posicionar esta disciplina a nivel mundial. Se presentan las principales áreas de investigación micológica, los laboratorios reconocidos y los investigadores para el país.In this article, the state of art of the mycology in Argentina is highlighted, with the purpose of reviewing the advances that allowed positioning this discipline worldwide. It reviews the main areas of research, laboratories recognized, and the researchers for the country.Instituto de Botánica "Dr. Carlos Spegazzini

A7. SITUAZIONE NAZIONALE: CORPI IDRICI INTERESSATI DA CIANOBATTERI TOSSICI

I cianobatteri sono diffusi in moltissimi ambienti acquatici, dove possono produrre cianotossine con diversi profili tossicologici. Il presente rapporto riporta le linee guida per la gestione delle fioriture di cianobatteri nelle acque di balneazione, elaborate da un gruppo di esperti. La prima parte sintetizza le attuali conoscenze scientifiche su vari aspetti, fra cui la loro presenza nei laghi italiani, le caratteristiche chimiche e tossicologiche delle varie cianotossine, gli effetti osservati sulla salute dell\u2019uomo e la valutazione del rischio. La seconda parte definisce le linee guida per prevenire effetti dannosi per la salute dei bagnanti e gestire il rischio associato alle fioriture. Vengono fornite indicazioni per pianificare attivit\ue0 di monitoraggio ambientale e sorveglianza sanitaria nelle aree a maggiore criticit\ue0. Viene inoltre presentato un sistema di reportistica, ambientale e sanitario, anche allo scopo di uniformare le informazioni a livello nazionale. Il rapporto \ue8 completato dalle indicazioni tecniche rivolte alle strutture territoriali preposte.Cyanobacteria thrive in many aquatic environments, where they can produce cyanotoxins with different toxicological profiles. This report provides the guidelines for the management of cyanobacterial blooms in bathing water, put together by a group of experts. The first part summarizes the current scientific knowledge on various aspects, including their presence in the Italian lakes, chemical and toxicological characteristics of different cyanotoxins, the observed effects on human health and the risk assessment. The second part defines the guidelines to prevent harmful effects on the health of bathers and manage the risk associated with blooms. It provides recommendations for planning environmental monitoring activities and a health surveillance system in most critical areas. It also introduces an environmental and health reporting system, with the purpose to standardize the information at national level too. The report is supplemented by technical information aimed at territorial authorities in charge

The PAMPA datasets: A metagenomic survey of microbial communities in Argentinean pampean soils

Background: Soil is among the most diverse and complex environments in the world. Soil microorganisms play an essential role in biogeochemical cycles and affect plant growth and crop production. However, our knowledge of the relationship between species-assemblies and soil ecosystem processes is still very limited. The aim of this study was to generate a comprehensive metagenomic survey to evaluate the effect of high-input agricultural practices on soil microbial communities. Results: We collected soil samples from three different areas in the Argentinean Pampean region under three different types of land uses and two soil sources (bulk and rhizospheric). We extracted total DNA from all samples and also synthetized cDNA from rhizospheric samples. Using 454-FLX technology, we generated 112 16S ribosomal DNA and 14 16S ribosomal RNA amplicon libraries totaling 1.3 M reads and 36 shotgun metagenome libraries totaling 17.8 million reads (7.7 GB). Our preliminary results suggested that water availability could be the primary driver that defined microbial assemblages over land use and soil source. However, when water was not a limiting resource (annual precipitation >800 mm) land use was a primary driver. Conclusion: This was the first metagenomic study of soil conducted in Argentina and our datasets are among the few large soil datasets publicly available. The detailed analysis of these data will provide a step forward in our understanding of how soil microbiomes respond to high-input agricultural systems, and they will serve as a useful comparison with other soil metagenomic studies worldwide.Instituto de Biotecnologia y Biologia Molecula

The PAMPA datasets: A metagenomic survey of microbial communities in Argentinean pampean soils

Background: Soil is among the most diverse and complex environments in the world. Soil microorganisms play an essential role in biogeochemical cycles and affect plant growth and crop production. However, our knowledge of the relationship between species-assemblies and soil ecosystem processes is still very limited. The aim of this study was to generate a comprehensive metagenomic survey to evaluate the effect of high-input agricultural practices on soil microbial communities. Results: We collected soil samples from three different areas in the Argentinean Pampean region under three different types of land uses and two soil sources (bulk and rhizospheric). We extracted total DNA from all samples and also synthetized cDNA from rhizospheric samples. Using 454-FLX technology, we generated 112 16S ribosomal DNA and 14 16S ribosomal RNA amplicon libraries totaling 1.3 M reads and 36 shotgun metagenome libraries totaling 17.8 million reads (7.7 GB). Our preliminary results suggested that water availability could be the primary driver that defined microbial assemblages over land use and soil source. However, when water was not a limiting resource (annual precipitation >800 mm) land use was a primary driver. Conclusion: This was the first metagenomic study of soil conducted in Argentina and our datasets are among the few large soil datasets publicly available. The detailed analysis of these data will provide a step forward in our understanding of how soil microbiomes respond to high-input agricultural systems, and they will serve as a useful comparison with other soil metagenomic studies worldwide.Instituto de Biotecnologia y Biologia Molecula

Identification of ammonium anomalies by SWIR reflectance spectroscopy: Implications for mining exploration

The existence of ammonium anomalies in mineralized deposits in Argentina is presented. These anomalies are given by the substitution of potassium ion by ammonium ion in certain feldspars, clay minerals and sulfates. This substitution doesn't produce physical changes either in the minerals or the host rocks. Ammonium-bearing minerals have been found in several hydrothermally altered metallic deposits. Ammonium ion is specially sensible to SWIR reflectance spectroscopy method, so it became an ideal, easy and valuable tool for ammonium anomalies detection. Although ammonium-bearing minerals are not always associated with metallic ore, they can be used as an exploration guide, being thus a very useful prospective method for metallic deposits in general. © 2006 Asociación Geológica Argentina.Fil:Godeas, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Litvak, V.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

Hifomicetes lign\uedcolas de Tierra del Fuego (Fungi, Fungi Imperfecti, Hyphomycetales)

En este trabajo se investiga los hifomicetes en los bosques de Tierra del Fuego, que crecen sobre madera y corteza en diferentes estados de descomposición. Se incluye una clave de los géneros encontrados y cuando fue necesario una clave de las especies. Se identificaron 39 especies de las cuales 18 son primeras citas para la Argentina. Se realizan algunas consideraciones acerca de su importancia en el ecosistema.<br>In this work, diversity and ditribution of Hyphomycetes growing in bark and wood in different degree of decomposition was study. Key of genera was included and when it was necessary, also key of species. At the end of this work, some consideration about the importance of this ecological group of fungi was made