Artículos de revista: Envíos recientes
Mostrando ítems 681-700 de 872
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First record of macrocybe titans (tricholomataceae, basidiomycota) in Argentina
(Pensoft, 2017)Macrocybe titans is characterized by its basidiomata with a remarkable size, the squamose stipe surface, and the pseudocystidia with refractive content. In this paper, we describe and analyze the macro and microscopic ... -
Evidence of the production of 2n eggs in diploid plants of the autopolyploid complex turnera sidoides L. (passifloraceae)
(Springer, 2015)Turnera sidoides is a complex of dystilous perennial rhizomatous herbs with five subspecies in which diploid (2n = 2x = 14) to octoploid (2n = 8x = 56) cytotypes were found. Previous studies have suggested an autopolyploid ... -
Aqueous two-phase systems: a simple methodology to obtain mixtures enriched in main toxins of Bothrops alternatus venom
(Academic Press Inc Elsevier Science, 2016)Phospholipase A2 (PLA2) and protease (P) are enzymes responsible of myotoxic, edematogenic and hemostasis disorder effects observed in the envenomation by Bothrops alternatus pitviper. Their partitioning coefficient (Kp) ... -
Laccaria fraterna (Cooke & Mass: : Sacc.) pegler, 1965 (agaricales, basidiomycota) associated with exotic eucalyptus sp. in northern Argentina and Paraguay
(Pensoft, 2017)Laccaria fraterna is recorded for the first time from the Cordillera Department, Paraguay and from northern Argentina. Both macroscopic and microscopic morphological characteristics of the basidiomata are described. ... -
Apoptosis induced by a snake venom metalloproteinase from bothrops alternatus venom in C2C12 muscle cells
(Springer, 2017)In this study, the apoptosis inducing effects of baltergin as well as its influence on cell adhesion and migration on muscles cells in vitro were studied. Morphological analysis made by scanning electron and pase contrast ... -
Nonlinear optimization for a tumor invasion PDE model : computational and applied mathematics
(Sociedade Brasileira de Matemática Aplicada e Computacional, 2018)In thiswork,we introduce amethodology to approximate unknownparameters that appear on a non-linear reaction–diffusionmodel of tumor invasion. These equations consider that tumor-induced alteration of micro-environmental ... -
Estimation of the functional form of subgrid-scale parametrizations using ensemble-based data assimilation : a simplemodel experiment
(Royal Meteorological Society, 2016)Oceanic and atmospheric global numerical models represent explicitly the large-scale dynamics while the smaller-scale processes are not resolved, so that their effects in the large-scale dynamics are included through ... -
Evidence of the occurrence of structural chromosome changes at the initial diploid diversification of the autopolyploid turnera sidoides l. (passifloraceae) complex
(Natl research council Canada-n R C research press, 2015)Turnera sidoides is an autopolyploid complex of obligate outcrossing perennial herbs. It includes five subspecies and five morphotypes in which diploid to octoploid cytotypes were found. Based on phenetic analyses of the ... -
Hedeoma teyucuarensis (lamiaceae), una especie nueva de Misiones, Argentina
(Instituto de Botánica Darwinion, 2016-07-31)Se describe una nueva especie de Hedeoma (Lamiaceae) sobre la base de muestras recolectadas en la provincia de Misiones, Argentina. Se incluye una ilustración, fotos del nuevo taxon, información acerca de su hábitat, estado ... -
Volvariella (pluteacae, basidiomycota) en el norte de la Argentina
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2017)Se describen e ilustran tres especies de Volvariella para el Norte de la Argentina: V. taylorii, conocida para las selvas de Yungas y Paranaense; V. subxerophytica, conocida exclusivamente para los bosques xerófilos de ... -
Chromosome numbers and DNA content in some species of mecardonia (gratiolae, plantaginaceae)
(Pensoft Publishers, 2016-12-14)Cytogenetic characterization and determination of DNA content by flow cytometry of five species of Mecardonia Ruiz et Pavon, 1798 (Gratiolae, Plantaginaceae) was performed. This is the first study of nuclear DNA content ... -
First description of the male of the spider tibellus paraguensis Simon, 1897 (araneae: philodromidae), with new distribution records
(Magnolia Press, 2016)The genus Tibellus Simon, 1875 currently includes 51 species (WSC 2016); it presents some taxonomic difficulties, due to morphological variability, and similarities among some congeners (Efimik 1999). Studies on the genus ... -
Explaining coexistence of nitrogen fixing and non-fixing rhizobia in legume-rhizobia mutualism using mathematical modeling
(Elsevier, 2017)In the mutualism established between legumes and soil bacteria known as rhizobia, bacteria from soil infect plants roots and reproduce inside root nodules where they fix atmospheric N 2 for plant nutri- tion, receiving ... -
New species of the Heterodermia comosa-group (Physciaceae, lichenized Ascomycota) from southern South America
(Association des Amis des Cryptogames, 2017)A revision of the specimens from southern South America deposited at CTES herbarium identified as Heterodermia comosa (Eschw.) Follmann & Redón was made. As result, four new species, viz. H. mobergiana Michlig, M.P. Rodríguez ... -
Phytoplankton of the Paraguay and Bermejo rivers
(E. Schweizerbartsche Verlags, 2014)This article deals with the phytoplankton of the Paraguay and Bermejo rivers, with emphasis on the spatial and temporal patterns of its composition, density, biomass, diversity and community size structure. The ... -
Phytoplankton of the Chaco-pampean plain
(E Schweizerbartsche Verlags, 2014)This article summarizes the characteristics of phytoplankton of the Chaco-Pampean Plain between the Pilcomayo River (25º15’S; 57º45’W) and the Lower Salado River (31º39’S; 60º45’W) towards the Paraguay-Paraná system. ... -
Cytogenetic evidences on the evolutionary relationships between the tetraploids of the section rhizomatosae and related diploid species (arachis, leguminosae)
(The Botanical Society of Japan, 2017)Rhizomatosae is a taxonomic section of the South American genus Arachis, whose diagnostic character is the presence of rhizomes in all its species. This section is of particular evolutionary interest because it has three ... -
Análisis cromosómico del híbrido arachis pintoi x a. repens (leguminosae) mediante citogenética clásica y molecular
(Sociedad Argentina de Botánica, 2013)El análisis cariotípico fue realizado en las especies parentales Arachis pintoi y A. repens, y el híbrido interespecífico. Las tres entidades presentan la misma fórmula cariotípica (18m+2sm) y un par de cromosomas ... -
Desarrollo embrionario y retención intrauterina en colúbridos del nordeste de Argentina
(Asociación Herpetológica Española, 2013)En los reptiles escamosos se reconocen dos modelos de desarrollo: oviparidad y viviparidad. Estos se consideran parte de un continuo y se ha planteado en numerosos trabajos que el patrón vivíparo habría evolucionado ... -
How does a viviparous semifossorial lizard reproduce? Ophiodesintermedius (squamata : anguidae) from subtropical climate in theWet Chaco region of Argentina
(Elsevier, 2017)The best predictors of reproductive patterns are commonly associated with climate factors, but evolu-tionary history also plays an important role. The semifossorial and viviparous lizard Ophiodes intermediusfrom the Wet ...
