Mathematical models of calcium and tight junctions in normal and reconstructed epidermis

This project investigated the calcium distributions of the skin, and the growth patterns of skin substitutes grown in the laboratory, using mathematical models. The research found that the calcium distribution in the upper layer of the skin is controlled by three different mechanisms, not one as previously thought. The research also suggests that tight junctions, which are adhesions between neighbouring skin cells, cannot be solely responsible for the differences in the growth patterns of skin substitutes and normal skin.

Mathematical models of calcium and tight junctions in normal and reconstructed epidermis

This project investigated the calcium distributions of the skin, and the growth patterns of skin substitutes grown in the laboratory, using mathematical models. The research found that the calcium distribution in the upper layer of the skin is controlled by three different mechanisms, not one as previously thought. The research also suggests that tight junctions, which are adhesions between neighbouring skin cells, cannot be solely responsible for the differences in the growth patterns of skin substitutes and normal skin.

Epidermis differentiation in Salmo irideus Gilb. development [Translation from: Archo ital.Anat.Embriol. 76, 19-30, 1971]

Recent histochemical and histophysiological research on the skin of fish has posed interesting problems both with regard to the presence of specialized types of cell and with regard to the function of this organ. The present paper intends to study the development and the functional differentiation of the trout's skin, both from the histomorphological and the histochemical point of view. The skin of Salmonids is devoid of specialized cells; the granular cells of Petromyzonti, the serous cells of Selacii and the clavate cells described in many other teleosts and it lacks keratin. As such it can be considered a good working model which can be used to show the eventual histomorphological and histochemical changes occurring both in the transformation from the endovular to the aqueous environment. Histomorphological observations were carried out demonstrate the great structural simplicity of the trout's skin at all stages. The article concludes that glycogen increases greatly when the epidermis thickens and therefore when it becomes necessary to guarantee resistance, amongst which is a support mechanism.

Immunolocalization and expression of vascular endothelial growth factor receptors (VEGFRs) and neuropilins (NRPs) on Keratinocytes in human epidermis

Vascular endothelial growth factor (VEGF) plays an important role in normal and pathological angiogenesis. VEGF receptors (VEGFRs, including VEGFR-1, VEGFR-2, and VEGFR-3) and neuropilins (NRPs, including NRP-1 and NRF-2) are high-affinity receptors for V

Ultrastructure of the accessory podia of Laganum depressum (Echinoidea, Clypeasteroida) with special emphasis on the disc epidermis

info:eu-repo/semantics/published

Ultrastructural features of the epidermis of the planarian Artioposthia triangulata (Dendy)

The epidermis of the land planarian Arthioposthia triangulata was examined by scanning and transmission electron microscopy. This investigation revealed that the flatworm was covered entirely with cilia and was especially densely populated on the ventral surface. In all regions the epidermis consisted of a one-layered columnar epithelium resting on a prominent basement membrane, but lacking a terminal web. Various secretions were found in the epidermis together with epidermal rhabdoids. Below the basement membrane other secretory material was visible and this included the cytoplasmic lamellated granules and adenal rhabdites. The basement membrane consisted of fibrils with a beaded appearance and these were arranged parallel to the epidermal layer but did not display cross-banding. The secretory cells above and below the basement membrane were compared and their products characterized on the basis of shape, size and location. Their possible function is discussed.

Determinación por métodos histoquímico enzimáticos del tiempo de aparición de las células de Langerhans en la epidermis del ratón albino (Mus musculus cepa C-D1)

Tesis (Maestría en Ciencias con Especialidad en Morfología) UANL

El suelo : epidermis viva de la Tierra.

Seleccionado en la convocatoria: Concurso de proyectos de cooperación en materia de investigación entre departamentos universitarios y departamentos de Institutos de Educación Secundaria o equipos de personal docente, Gobierno de Aragón 2009-10

Luis Antonio Robles sombra y luz : con la sombra en la epidermis y la luz en el alma

Mediante el presente texto se quiere resaltar la vida de Luis Antonio Robles ("El negro Robles", como se le conoce), quien vivió en una importante época de la construcción de nuestro país, en la cual ni era común que alguien de su raza llegase a las instituciones de educación superior y, mucho menos, que ocupase altos cargos e incidiese en la vida policía como él hizo. Luis Antonio Robles ingresó a la Universidad Colegio Mayor de Nuestra Señora del Rosario en 1868; fue Colegial y se graduó como doctor en Jurisprudencia en el año 1872, destacándose por su inteligencia y su excelente rendimiento académico. El 11 de mayo de 2010, el señor rector y los Conciliarios del Colegio Mayor de Nuestra Señora del Rosario invitaron a toda la comunidad académica al descubrimiento de una placa conmemorativa de Luis A. Robles "El Negro Robles" que dice: " Luis A. Robles. 1849-1899. Colegial. Doctor en Jurisprudencia, catedrático servidor del a República. Su vida y obra ejemplares enseñaron que la sangre afrocolombiana nutre las raíces de la patria". Es importante destacar la concurrida presencia tanto de los miembros de la comunidad rosarista como de distinguidos representantes de la vida política, de líderes de las comunidades afrocolombianas, así como de una delegación que se desplazó desde varias ciudades de La Guajira y de algunos miembros de la Fundación Luis Antonio Robles. El reconocimiento que se quiere hacer hoy al a vida de Luis Antonio Robles parte de la presentación que a continuación se hace del texto "introducción a la filosofía de la moral y las ciencias políticas" que recoge los apuntes de clase del doctor Robles y el cual se encuentra comentado por el Dr. Jacobo Pérez Escobar, quien de manera muy gentil nos permitió su reproducción. Adicionalmente, se presentan las palabras que en el homenaje hicieron el doctor Hans Peter Knudsen Quevedo, Rector del Colegio Mayor de Nuestra Señora del Rosario y el doctor Jacobo Pérez Escobar, principal biógrafo de Luis Antonio Robles. De igual forma se presentan las palabras de la estudiante de la Facultad de Jurisprudencia, Diana Carolina Prado Mosquera y el texto "El Negro Robles: Adalid de la democracia" el doctor Amylkar D. Acosta M, quien gentilmente también nos ha permitido reproducirlo. En la parte final se incluye la galería fotográfica donde se recogen las principales imágenes del homenaje que se realizó en el aula Máxima del Claustro, en honor a Luis Antonio Robles. Debemos agradecer, en primer término, al Dr. Jacobo Pérez Escobar por su desinteresada pero maravillosa participación en este proyecto, que nos permitió conocer de manera profunda la vida de Luis Antonio Robles; y, en segundo lugar, al Dr. Amylkar D. Acosta por su aporte del texto que a continuación presentaremos.

Scale architecture of the palmar and plantar epidermis of Polychrus acutirostris Spix, 1825 (Iguania, Polychrotidae) and its relationship to arboreal locomotion

In tetrapod squamates, the diversity of micro-ornamentations of the epidermis of the contact areas of hands and feet is generally associated with constraints and modalities related to locomotion. Polychrus acutirostris is a medium-sized lizard that occurs in open heterogeneous habitats in South America, such as the cerrados, caatingas, and fallow lands. It progresses slowly on branches of various diameters in its arboreal environment. It can also move more rapidly on the ground. The hands and feet are prehensile and may be considered an adaptation for grasping and climbing. Epidermal surfaces from the palmar and plantar areas of the hands and feet of P. acutirostris were prepared for SEM examination, and studied at various magnifications. They show three major levels of complexity: (1) scale types, organized in gradients of size and imbrication, (2) scalar ornamentations, organized by increasing complexity and polarity, and (3) presence of Oberhautchen showing typically iguanian honeycomb micro-ornamentations. The shape and surface structure of the scales with their pattern of micro-ornamental peaks, which improve grip, and the grasping hands and feet indicate that P. acutirostris is morpho-functionally specialized for arboreality. (C) 2009 Elsevier GmbH. All rights reserved.