Descrição do girino de Agalychnis hulli (Anura: Hylidae)

Se recolectaron larvas en la Amazonia Ecuatoriana, las cuales permiten la descripción científica del renacuajo de Agalychnis hulli. El renacuajo es inusual entre los Phyllomedusinae y su morfología externa es más similar a las especies de Hylomantis que a otras especies de Agalychnis, lo que sugiere que la especie bien puede representar un vínculo evolutivo importante entre estos géneros. El renacuajo, que hasta la fecha no ha sido descrito, se puede distinguir de todos los demás renacuajos de Agalychnis por tener un disco oral (i) que se dirige anteroventralmente y se extiende a más de la mitad del ancho del cuerpo, (ii) que se modifica en una estructura corta en forma de embudo, (iii) y que está rodeado por una sola fila de papilas marginales.The collection of larval specimens from Amazonian Ecuador allows for the scientific description of the tadpole of Agalychnis hulli. The tadpole is unusual among Phyllomedusinae and its external morphology appears more similar to species of Hylomantis than other species of Agalychnis, suggesting the species may well represent an important evolutionary link between these genera. The tadpole, which to date has remained undescribed, can be distinguished from all other Agalychnis tadpoles in having an oral disc (i) that is directed anteroventrally and extends to more than half the width of the body, (ii) which is modified into a short funnel- shaped structure, (iii) and surrounded by a single row of marginal papillae.A coleta de espécimes larvais da Amazônia equatoriana permitem a descrição científica do girino de Agalychnis hulli. O girino é incomum entre os Phyllomedusinae e sua morfologia externa parece mais similar à das espécies de Hylomantis do que a de outras espécies de Agalychnis, sugerindo que essa espécie podem representar um importante elo evolutivo entre estes gêneros. O girino, que até hoje não havia sido descrito, pode ser distinguido de todos os outros girinos de Agalychnis por apresentar um disco oral (i) dirigido anteroventralmente e estendendos-e para mais da metade da largura do corpo, (ii) modificado em uma estrutura curta em forma de funil, e (iii) rodeado por uma única fileira de papilas marginais

Determination of C-reactive protein in female dogs with benign and malignant mammary tumors

Indexación: ScieloSUMMARY The aim of this study was to determine C-reactive protein levels in dogs with benign and malignant mammary tumors. Thirty female dogs, with ages ranging between 6 and 15 years and with no distinction of breed were used for this purpose. The animals were divided into 3 different groups of 10 dogs each: Group 1 (control), Group 2 (benign mammary tumor) and Group 3 (malignant mammary tumor). The neoplasias were classified histologically and C-reactive protein (CRP) levels were analyzed using a human turbidimetric immunoassay validated for dogs. Group 3 had the highest values (mean: 8.2 mg/L; median: 7.1 mg/L) of C-reactive protein compared with the other groups (P < 0.05). According to a discriminant analysis, a female dog with a mammary tumor and CRP values ≥ 8 mg/L has a 61% or greater probability of this tumor being malignant. Key words: C-reactive protein, mammary tumors, malignant. RESUMEN El objetivo de este estudio fue determinar los niveles séricos de proteína C-reactiva en caninos con neoplasias mamarias benignas y malignas. Se determinaron concentraciones séricas de proteína C-reactiva en 30 hembras caninas con edades entre 6 y 15 años, sin discriminación de raza y no esterilizadas. Los animales fueron divididos en tres grupos de 10 individuos cada uno: grupo 1 (control), grupo 2 (neoplasia mamaria benigna) y grupo 3 (neoplasia mamaria maligna). Las neoplasias mamarias fueron clasificadas mediante estudio histopatológico en benignas o malignas. Los niveles séricos de proteína C-reactiva se determinaron a partir de un ensayo inmunoturbidimétrico de uso humano validado en caninos. El grupo 3 fue el que presentó los valores más altos (media 8,2 mg/L, mediana 7,1 mg/L) de proteína C-reactiva con respecto a los otros dos grupos (P < 0,05). De acuerdo con un análisis discriminante, una perra con neoplasia mamaria y valores de CRP ≥ 8 mg/L tiene una probabilidad de un 61% o más de que ésta sea maligna. Palabras clave: proteína C-reactiva, neoplasia mamaria, maligna

Olefin Purification and Selective Hydrogenation of Alkynes with Low Loaded Pd Nanoparticle Catalysts

The catalytic performance of Pd-nanoparticle catalysts for the selective hydrogenation of alkynes at mild conditions (150 kPa and 303 K) was evaluated. A Lindlar commercial catalyst was also tested for comparison. The effects of acidity, amount of active sites and dispersion on the catalytic activity and selectivity were studied. At mild conditions, Pd-nanoparticle catalysts were considerably more active and slightly more selective than the Lindlar catalyst. The best synthesized catalyst for the purification of 1-pentene was Pd/Al2O3-Mg (r0 = 41.1 mol gPd–1 min–1, 94% selectivity). The activity and selectivity of Pd/CaCO3 were similar to those of the Lindlar catalyst. The smallest particle sizes (3–4.5 nm) favored the dissociative adsorption of hydrogen over Pd° active sites and a good catalytic behavior. The weaker acid centers (Lewis) of Pd/Al2O3-Mg and Pd/CaCO3 favored higher selectivities to the desired alkene. Pd/Al2O3 was the most active catalyst but also the least selective. This was due to strong acid sites, remnant Bronsted acid sites, which provide extra hydrogen that favors the alkyne hydrogenation rate and also the undesired overhydrogenation of the alkene and/or the isomerization.The financial support provided by UNL (Grants CAI+D 50420150100074LI and 50420150100028LI), CONICET (Grant PIP 11220130100457CO), and ANPCyT (Grant PICT 2016 1453) are acknowledged

Surface and sub-surface oxidation of thin films using Low Energy Ion Scattering

Ru and ZrN are candidate capping layers for applications such as catalysis, electronics and optical coatings: Ru exhibits a low resistivity, high thermal stability, excellent oxidation resistance and good diffusion capabilities. ZrN is thermally stable, and is known for its good mechanical properties. Although the oxidation process has been studied for both materials, the surface and especially the sub-surface oxidation is not properly understood and well addressed. We use the sub-monolayer surface sensitivity of the low energy ion scattering (LEIS) technique for in-situ monitoring of surface oxidation and determination of the oxygen sticking probabilities. From the LEIS in-depth signal, sub-nanometer sub-surface oxidation can be determined as a function of time and from these data oxygen diffusion constants can be extracted. These data support the applications for which adequate protecting surface films are required. i) Author to whom correspondence should be addressed. Electronic mail: [email protected]

El Duque de Piedra : novela original

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-2010"Biblioteca Patria" de obras premiadas publica sus obras entre 1904 y 193

Desde la cumbre de la vida : colección de cuentos...

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-201

El alma de la Tierra de Campos

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 2009-201

Surface and sub-surface thermal oxidation of thin ruthenium films

A mixed 2D (film) and 3D (nano-column) growth of ruthenium oxide has been experimentally observed for thermally oxidized polycrystalline ruthenium thin films. Furthermore, in situ x-ray reflectivity upon annealing allowed the detection of 2D film growth as two separate layers consisting of low density and high density oxides. Nano-columns grow at the surface of the low density oxide layer, with the growth rate being limited by diffusion of ruthenium through the formed oxide film. Simultaneously, with the growth of the columns, sub-surface high density oxide continues to grow limited by diffusion of oxygen or ruthenium through the oxide fil

Serological autoimmune profile of systemic lupus erythematosus in deep and non-deep endometriosis patients

Several studies have reported a high prevalence of autoimmune diseases such as systemic lupus erythematosus (SLE) in endometriosis patients. The aim of this study was to evaluate the SLE autoimmune antibody profile in patients with deep (DE) and non-deep endometriosis (Non-DE).Four groups of premenopausal patients were evaluated: patients with DE (n = 50); patients with ovarian endometriomas (Non-DE; n = 50); healthy patients without endometriosis (C group; n = 45); and SLE patients without endometriosis (SLE group; N = 46). Blood samples were obtained and the standard SLE autoimmune profile was evaluated in all patients. Pain symptoms related to endometriosis and clinical SLE manifestations were also recorded.The DE group presented a statistically significant higher proportion of patients with antinuclear antibodies (ANA) (20%) compared to the Non-DE group (4%) and C group (2.2%). Levels of complement were more frequently lower among DE and Non-DE patients although differences did not reach statistical significance. Similarly, anti-dsDNA antibodies and anticoagulant lupus were positive in more patients of the DE group but did not reach statistical significance. The DE group complained of more arthralgia and asthenia compared to the Non-DE and C groups.The results of this study showed higher positivity of ANA and greater arthralgia and asthenia in patients with DE compared with Non-DE patients and healthy controls, suggesting that they may have a higher susceptibility to autoimmune diseases and present more generalized pain.Copyright © 2023. Published by Elsevier B.V

Estimación de los costes de construcción de viviendas rústicas mediante Redes Neuronales Artificiales

The Public Administration and the private developer seek to have a prior knowledge of the costs of any building. There are numerous methodologies in the literature that allow the real estate valuation of a property, but it has always been done for urban houses in large or medium-sized cities. This research proposes the use of Artificial Intelligence for the study of rustic houses in small cities such as Caceres (Spain). The research proposes a procedure of Artificial Neural Networks (ANN) to achieve on the one hand, to estimate, through an automatic method, the construction cost of rustic houses and, on the other hand, to identify the most determining attributes in its final price and its marginal weight. The designed ANN establishes as more influential variables in the final price of the property the wet spaces (bathrooms and kitchen), the constructed surface and the age in this order, differentiating themselves from the most determining variables in the price of urban houses in large or medium-sized cities that are the constructed surface and its location.La Administración Pública y el promotor privado buscan tener un conocimiento previo de los costes de cualquier edificación. Existen en la literatura numerosas metodologías que permiten realizar la valoración de un inmueble, pero siempre se ha realizado para viviendas urbanas en ciudades grandes o medianas. Esta investigación propone el uso de Inteligencia Artificial para el estudio de viviendas rústicas en pequeñas ciudades como la de Cáceres (España). La investigación propone un procedimiento de Redes Neuronales Artificiales (RNA) para conseguir por un lado estimar a través de un método automático el coste de construcción de la vivienda rústica y por otro, identificar los atributos más determinantes en su precio final. La RNA diseñada establece como variables más influyentes en el precio final del inmueble los espacios húmedos (baños y cocina), la superficie construida y la antigüedad por este orden, diferenciándose de las variables más determinantes en el precio de las viviendas urbanas en grandes o medianas ciudades que son la superficie construida y su ubicación