468 resultados para Llama


Relevância:

20.00% 20.00%

Publicador:

Resumo:

There is an urgent global need for preventative strategies against HIV-1 infections. Llama heavy-chain antibody fragments (VHH) are a class of molecules recently described as potent cross-clade HIV-1 entry inhibitors. We studied the potential of a VHH-based microbicide in an application-oriented fashion. We show that VHH can be inexpensively produced in high amounts in the GRAS organism S. cerevisiae, resulting in very pure, and endotoxin free product. VHH are very stable under conditions they might encounter during transport, storage or use by women. We developed active formulations of VHH in aqueous gel and compressed and lyophilized tablets for controlled release from an intra vaginal device. The release profile of the VHH from e.g. a vaginal ring suggests sufficient bioavailability and protective concentration of the molecule at the mucosal site at the moment of the infection. The ex vivo penetration kinetics through human tissues show that the VHH diffuse into the mucosal layer and open the possibility to create a second defense layer either by blocking the HIV receptor binding sites or by blocking the receptors of immune cells in the mucosa. In conclusion, our data show that VHH have

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Introducción y edición a cargo de Maria Antònia Perelló Femenia. Resumen tomado de la publicación

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Debido al formato del libro, que contiene ilustraciones y es de fácil lectura, está recomendado para lectura infantil y juvenil

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Imágenes de la llegada a L'Escala de la llama olímpica proveniente de Olímpia el 13 de junio de 1992. Se recogen también los actos posteriores a esta celebración y previos a los juegos olímpicos de Barcelona.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Se exponen los resultados de una encuesta sobre el consumo de alcohol en los jóvenes. Entre otras conclusiones destacan la edad de inicio en el consumo de alcohol, entre los 14 y 16 años, pero algunos comienzan a los ocho; el consumo se realiza en fines de semana y fiestas especiales; se bebe sobre todo cerveza, con una media semanal equivalente a 12 botellines de 250 cc; se emborracha el 65 por ciento de los jóvenes; o el alcohol es la tercera causa de muerte entre los jóvenes. Se explican los efectos del consumo de alcohol; los comportamientos sospechosos de los jóvenes ante los padres o las razones por las que beben los adolescentes y el papel de la familia para tratar de solucionar el problema.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Transcripción del discurso que Su Santidad el Papa Pablo VI, dirigió a los congresistas de la Oficina Catequística Italiana el 28 de agosto de 1964. Destacó la importancia de la educación y la enseñanza en las escuelas cristianas. Exaltó la labor de los docentes religiosos tanto en los colegios, difundiendo la religión como asignatura, como en las parroquias dónde se enseña el catecismo y animó a la colaboración entre religiosos y familias para la formación de los jóvenes.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Monográfico con el título: 'El cambio en educación'. Resumen basado en el de la publicación

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Samples from 9 llamas (28 through 36 weeks of gestation) were collected and fixed in 4% buffered paraformaldehyde (light microscopy) and in 2.5% buffered glutaraldehyde (transmission and scanning electron microscopy). The material was processed in paraplast and slides (5μm) were stained with HE, PAS, Masson-Trichrome, acid phosphatase and Perl's. The uteroferrin was immunolocalized. The results show that llama placenta is chorioallantoic, diffuse, folded and epitheliochorial, and the fetus is covered with an epidermal membrane. The trophoblast cells have variable morphology: cubic, rounded and triangular cells, with cytoplasm containing PAS-positive granules. Binucleated cells with large cytoplasm and rounded nuclei, as well as giant trophoblastic cells with multiple nuclei were also observed. Numerous blood vessels were observed beneath the cells of the uterine epithelium and around the chorionic subdivided branches. Glandular activity was shown by PAS, Perl's, and acid phosphatase positive reactions in the cytoplasm and glandular lumen, and by immunolocalization of the uteroferrin in the glandular epithelium. The uterine glands open in spaces formed by the areoles, which are filled by PAS-positive material. The llama fetus was covered by the epidermal membrane, composed of stratified epithelium, with up to seven layers of mono-, bi- or trinucleated cells. The high level of maternal and fetal vascularization surfaces indicates an intense exchange of substances across both surfaces. The metabolic activity shown in the uterine glands suggests an adaptation of the gestation to the high altitudes of the natural habitat of this species.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Conmemoración del 50ª aniversario de la revista.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Comunicación presentada en la III Reunión Nacional sobre Dioxinas, Furanos y Compuestos Orgánicos Persistentes Relacionados, Santander, 30 junio-1 julio 2011.