Artículos de revista: Envíos recientes
Mostrando ítems 121-140 de 872
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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 ... -
Structural, energetic, and UV-Vis spectral analysis of UVA filter 4‑tert-Butyl-4′-methoxydibenzoylmethane
(American Chemical Society, 2014)The growing awareness of the harmful effects of ultraviolet (UV) solar radiation has increased the production and consumption of sunscreen products, which contain organic and inorganic molecules named UV filters that absorb, ... -
Intrinsic antioxidant potential of the aminoindole structure. A computational kinetics study of tryptamine
(American Chemical Society, 2018)A computational kinetics study of the antioxidant activity of tryptamine toward HO* and HOO* radicals in water at 298 K has been carried out. Density functional methods have been employed for the quantum chemical calculations ... -
Study of the structural and electronic properties of valproic acid and new derivatives used as anticonvulsant agents
(American Chemical Society, 2011)The conformational and electronic characteristics of the polar O9dC8—X10 moiety in the anticonvulsant valproic acid (Vpa) drug and some of their amides and ester derivatives are analyzed at the B3LYP level using the ... -
Strength and nature of hydrogen bonding interactions in mono-and di-hydrated formamide complexes
(American Chemical Society, 2011)In this work, mono- and di-hydrated complexes of the formamide were studied. The calculations were performed at the MP2/6-311þþG(d,p) level of approximation. The atoms in molecules theory (AIM), based on the topological properties ... -
Una nueva especie de Meianophryniscus (Anura : bufonidae) del grupo stelzneri de Corrientes, Argentina
(Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura, 1999)Se describe Meianophryniscus cupreuscapularis sp. nov., del grupo Meianophryniscus stelzneri, de la región noroeste de la provincia de Corrientes, Argentina. Se lo puede distinguir de las otras especies por su coloración ...
