1,992 research outputs found
Genus Pogostemon (Lamiaceae) in Cuba
Context: The presence in Cuba of taxons of Pogostemon Desf. (Lamiaceae), a native genus from Africa, Asia, and Australia, whose previous recorded information was not accurate.
Objectives: To report on relocation of a species of this genus, define its nomenclature, contribute with data for identification, and provide arguments of its usefulness.
Methods: Study of herbarium specimens, field exploration, sample comparisons with descriptions, analytical keys, and samples incorporated to scientific collections.
Results: The presence of Pogostemon cablin (Blanco) Benth (Lamiaceae) was confirmed in the provinces of Sancti Spíritus, Camagüey, Holguín, and Guantánamo, Cuba. This is a promising species for the medical-pharmaceutical industry, and the areas of perfumes and cosmetics.
Conclusions: Out of the 34 infra-generic Lamiaceae representatives known to be of exotic origin in the Cuban archipelago, 25 have been unable to naturalize
Inclusiones parasitarias compatibles con Ehrlichia spp. Y Hepatozoon canis concomitantes en un neutrófilo
Se describe el caso clínico de una Cócker de 5 años de edad que llegó a nuestro centro veterinario con sintomatología compatible con ehrlichiosis, detectándose, en un frotis sanguíneo, la presencia en un mismo neutrófilo de una mórula de Ehrlichia y un gametocito de Hepatozoon canis. El animal respondió favorablemente al tratamiento con doxiciclina, dipropionato de imidocarb y atropina. La última reorganización taxonómica del género Ehrlichia ha dividido este género en tres; género Anaplasma, género Neorickettsia y género Ehrlichia, de forma que el clínico veterinario debe conocer las especies de Ehrlichia más frecuentes en su zona de trabajo, la sintomatología asociada y los hallazgos de laboratorio típicos de cada especie para poder llegar a un diagnóstico etiológico final de ehrlichiosis. La serología (junto a otras pruebas de laboratorio) es el método más utilizado para el diagnóstico final de ehrlichiosis, siendo necesario conocer bien sus beneficios y limitaciones porque nos puede llevar a diagnosticar fundamentalmente, falsos negativos. Además, es difícil saber con exactitud qué especie de Ehrlichia ha provocado la enfermedad debido a las reacciones serológicas cruzadas entre algunas especies próximas filogenéticamente. Por eso, con el fin de conocer exactamente la especie de Ehrlichia involucrada en la infección, se puede recurrir a la ayuda de técnicas de diagnóstico molecular.
Floristic and Physiognomic Characterization of Casino Campestre City Park in Camagüey, Cuba
A floristic and physiognomic characterization was made to the flora and vegetation of Casino Campestre, the most important city park in Camagüey, Cuba. The presence of 198 species from 170 genera and 72 families was reported to live in the park. Most species are exotic trees, which also grow along with some native and endemic elements. Their social, cultural, and environmental significance was assessed
Bivariate orthogonal polynomials in the Lyskova class
AbstractClassical orthogonal polynomials in two variables can be characterized as the polynomial solutions of a matrix second-order partial differential equation involving matrix polynomial coefficients. In this work, we study classical orthogonal polynomials in two variables whose partial derivatives satisfy again a second-order partial differential equation of the same type
Semiclassical orthogonal polynomials in two variables
AbstractIn this work, semiclassical orthogonal polynomials in two variables are defined as the orthogonal polynomials associated with a quasi definite linear functional satisfying a matrix Pearson-type differential equation. Semiclassical functionals are characterized by means of the analogue of the structure relation in one variable. Moreover, non trivial examples of semiclassical orthogonal polynomials in two variables are given
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