background : acromegaly, a condition which is associated with an acquired progressive disfigurement mainly involving the face and extremities, is a clinical syndrome which results from excessive production of growth hormone (gh) most commonly due to adenoma of the pituitary gland. acromegaly is a rare disease which due to its slow progression, is mostly diagnosed in late adulthood. bilateral sy...

PURPOSE To assess the relationship among the concha bullosa types and sinusitis, ostiomeatal and frontal recess disease. MATERIALS AND METHODS Computed tomography (CT) studies of 76 patients diagnosed with concha bullosa were reviewed retrospectively. All examinations were performed for evaluation of a symptom referable to sinonasal region. Concha bullosa cases were grouped according to the l...

BACKGROUND AND AIMS Lippia scaberrima, an aromatic indigenous South African plant, with medicinal application, potentially has economic value. The production of essential oil from this plant has not been optimized, and this study of the chemico-morphological characteristics was aimed at determining the location of oil production within the plant. Furthermore, the locality of other secondary met...

A new species of the rodent genus Reithrodontomys (Cricetidae: Neotominae) is described from Cerro Asunción in the western Cordillera de Talamanca, Costa Rica. The long tail, elongate rostrum, bulbous braincase, and complex molars of the new species associate it with members of the subgenus Aporodon, tenuirostris species group. In its diminutive size and aspects of cranial shape, the new specie...

Trophic polymorphisms are a prominent form of phenotypic diversification in many animal taxa. Northern temperate lakes have become model systems for the investigation of sympatric speciation due to trophic polymorphisms. Many examples of niche-based phenotypic variation occur in temperate lakes, whereas northern rivers offer few such examples. To further investigate the conditions under which t...

A certain pacific fish has a thalamic nerve cell with a unique dendritic geometry. Instead of the cell having a branching dendritic structure, the large cell of the corpus glomerulosum has, generally, a single dendritic stalk with a large bulbous tip. We formulate a cable-theory model that incorporates the geometry, and then, we solve the problem for a single, localized synaptic current source ...

Anacanthorus franciscanus sp. n. and Anacanthorus brevicirrus sp. n. (Dactylogyridae) are described from the gills of the matrinchã, Brycon orthotaenia Günther (Characidae), from the Rio São Francisco in Brazil. Anacanthorusfranciscanus most closely resembles Anacanthorus e[egans and A. kruidenieri from the matrinchõ, Brycon melanopterus, of the Amazon River Basin. It differs from these species...

ornamental geophytes (ornamental flower bulbs) are international and national heritage considering their contribution to people's life quality around the world. iranian habitats support about 8000 species of flowering plants (belonging to 167 families and 100 genera) of which almost 1700 are endemic. iran is a rich country in terms of distribution of bulbous plants. more than 200 species of bul...