RIUNNE Repositorio Institucional de la Universidad Nacional del Nordeste: Envíos recientes
Mostrando ítems 241-260 de 15939
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Considerations on the genus Schizachyrium (Poaceae–Andropogoneae) in Central America and West Indies, and confirmation of the occurrence of S. glaziovii
(Magnolia Press, 2015-02-25)Schizachyrium (Poaceae–Andropogoneae) incluye cerca de 60 especies, 10 de las cuales fueron previamente citadas para América Central y 13 especies para las Indias Occidentales. En este trabajo se reporta la presencia de ... -
Bulbostylis litoreamazonicola, a new species of Cyperaceae from the Brazilian Amazonian coast
(Magnolia Press, 2022-01-10)A new species of Bulbostylis (Cyperaceae), only known from the Brazilian Amazonian coast, is here described and illustrated. Bulbostylis litoreamazonicola was found growing over dunes, in seasonally flooded restinga ... -
A new variety of Schizachyrium (Poaceae : Andropogoneae) from South America, with notes on the infraspecific taxa of Schizachyrium tenerum
(Magnolia Press, 2019-05-09)A new variety of Schizachyrium tenerum from South America is described and illustrated. The new taxon (S. tenerum var. muticum) differs from the other varieties of the species (S. tenerum var. tenerum and S. tenerum var. ... -
A taxonomic revision of the genus Bacopa (Gratioleae, Plantaginaceae) in Argentina
(Magnolia Press, 2018-01-26)In the present work a revision of Bacopa for Argentina is presented. In this country the genus is integrated by twelve native taxa: eleven species and one variety. Full descriptions, along with distribution information, ... -
Taxonomic position and identity of Stemodia scoparioides (Gratiolae, Plantaginaceae)
(Magnolia Press, 2013-10-01)In recent floristic and taxonomic studies, Stemodia scoparioides (Gratiolae, Plantaginaceae) has been considered a synonym of S. lanceolata or a synonym of S. stricta. However, a detailed analysis of the type material and ... -
Stemodia diplohyptoides (Plantaginaceae, Gratiolae) : a new diploid species from South America
(Magnolia Press, 2014-12-04)Stemodia diplohyptoides (Plantaginaceae), a new species from Gratiolae tribe is described and illustrated. This taxon is found in northeastern Argentina, at the edge of the Parana River that surrounds the north and center ... -
Pholiota oblita, new species in sect. Adiposae stirps Subflammans (Strophariaceae, Agaricomycetes), from the Argentinean Yungas
(Magnolia Press, 2014-05-14)We present a study on the genus Pholiota sect. Adiposae stirps Subflammans from the Republic of Argentina. Pholiota oblita is proposed as a new species. It is characterized by its narrow lamellae, elongated cheilocystidia ... -
Geographic variation of Serjania perulacea (Paullinieae, Sapindaceae) and description of two new varieties
(Magnolia Press, 2017-7-11)We assessed the morphological diversity of Serjania perulacea using multivariate analyses (principal coordinates and component analysis) of quantitative and qualitative morphological leaf traits. We also investigated the ... -
Hemimycena longipleurocystidiata (Mycenaceae, Agaricomycetes), a new species from the Argentinean Atlantic Forest
(Magnolia Press, 2014-08-22)The Atlantic Forest is the second largest South American tropical-subtropical rainforest and one of the most diverse ecosys- tems on earth. Hemimycena longipleurocystidiata, a fungal species collected in the Argentinean ... -
Isolation and functional characterization of a new acidic PLA2 Ba SpII RP4 of the Bothrops alternatus snake venom from Argentina
(Elsevier, 2010-08)An acidic protein with phospholipase A2 activity was purified to homogeneity from the venom of the Northeast Argentinian viperid Bothrops alternatus by two chromatographic steps: a conventional gel filtration on Sephadex ... -
Fast venomic analysis of Crotalus durissus terrificus from northeastern Argentina
(Elsevier, 2020-09)The complete knowledge of the toxins that make up venoms is the base for the treatment of snake accidents victims and the selection of specimens for the preparation of venom pools for antivenom production. In this work, ... -
Musa spp. cultivars as a neutralising source against some toxic activities of Bothrops and Crotalus genus snake venoms
(Elsevier, 2023-06)Accidents involving snakes from Bothrops spp. and Crotalus spp. constitute the most important cause of envenomation in Brazil and Argentina. Musa spp. (banana) have been reported to be used in popular medicine against ... -
Photobiomodulation therapy on local effects induced by juvenile and adult venoms of Bothrops alternatus
(Elsevier, 2022-12)Bothrops snake envenomation is characterized by severe local manifestations such as pain, edema, inflammation, hemorrhage, and myonecrosis. Furthermore, it is described that venom from juvenile and adult snakes may have ... -
Ipomoea carnea alkaloid extract vs swainsonine : a comparative study on cytotoxic activity against glial cells
(Elsevier, 2023-11)The consumption of Ipomoea carnea produces a neurological syndrome in animals. The toxic principles of I. carnea are the alkaloids swainsonine (SW) and calystegines B1, B2, B3 and C1. In this study, we investigated the ... -
Synergism between baltergin metalloproteinase and Ba SPII RP4 PLA2 from Bothrops alternatus venom on skeletal muscle (C2C12) cells
(Elsevier, 2012-02)Acute muscle damage, myonecrosis, is one of the main characteristics of envenoming by Bothrops genus. In this in vitro study we investigated the role of a metalloproteinase (baltergin) and an acidic phospholipase A2 (Ba ... -
Study of confinement and catalysis effects of the reaction of methylation of benzene by methanol in H-Beta and H-ZSM-5 Zeolites by topological analysis of electron density
(American Chemical Society, 2018)In this work we studied the host-guest interactions between confined molecules and zeolites, and their relationship with the energies involved in the reaction of methylation of benzene by methanol in H-ZSM-5 and H-Beta ... -
Confinement effects in protonation reactions catalyzed by zeolites with large void structures
(American Chemical Society, 2018)In the present work, we studied the protonation reaction of styrene inside the cavity of acidic H-Y zeolite. Density functional theory calculation using M06-2X functional and analysis of quantum theory of atoms in molecules ... -
Preferential formation of the different hydrogen bonds and their effects in tetrahydrofuran and tetrahydropyran microhydrated complexes
(American Chemical Society, 2012)The role of cycloether−water (c−w) and water−water (w−w) hydrogen bonds (H-bonds) on the stability of the tetrahydrofuran THF/(H2O)n and the tetrahydropyran THP/(H2O)n complexes with n = 1−4 was investigated herein using ... -
Do organometallic CH4-Me+p adducts and X4H+ (X = P, As) clusters undergo two-electron three-center interactions? Some aspects of discussion
(American Chemical Society, 2015)Most of the systems possessing true two-electron three-center interactions are electron deficient compounds like boron hydrids, closo-boranes, and some organic ions such as butonium cations. In this work, we perform a ... -
Double hole-lump interaction between halogen atoms
(American Chemical Society, 2015)In this paper a theoretical study has been carried out to investigate the nature of the unusual halogen− halogen contacts in the complexes R−X···X−R (with R = −H, −Cl, −F and X = Cl, Br, I). AIM, NBO, and MEP analyses have ...
