some soil physical and chemical characteristics were analyzed in order to reveal the relationship between forest soils and regeneration patches. gorazbon district of kheyrud was selected as a case study for the research area. all regeneration patches were recorded using gps device. to assess the spatial structure and to quantify the metrics of regeneration patches, analyzing of landscape metric...

without doubt is one important aspects of sustainable forest management the continuing forest regeneration. identify and determine is effective dispersal and distribution pattern of regeneration patches in various types of forest and its evolution, in maintaining biodiversity in natural ecosystems. purpose was chosen of gorazbon district kheyrod forest for study, all patches regeneration were l...

It is 100 years since von Graefe first demonstrated a suppression scotoma in an amblyopic eye.' A review of publications on the subject of suppression in strabismus reveals that this has not been a very active area of research and that what literature there is contains many apparent contradictions. Early workers found strong suppression at the fovea of the deviating eye in strabismic amblyopia ...

PURPOSE To report a case of cancer-associated nummular loss of the retinal pigment epithelium. METHODS A 47-year-old man with a history of hepatocellular carcinoma presented with three weeks of bilateral visual loss. His best-corrected visual acuity was 20/40 in each eye. He had multiple round confluent grayish-brown patches at the level of retinal pigment epithelium, and no pigmented choroid...

In the lateral geniculate nucleus of the mink, on-center and off-center neurons occupy separate layers [LeVay, S. & McConnell, S.K. (1982) Nature (London) 300, 350-351]. To study the mode of termination of geniculate afferents in area 17, we recorded from their terminal arborizations in layer IV after the destruction of cortical neurons by injection of kainic acid. At the majority of recording ...

seed bank is a central topic for plant community restoration. we determined the potential and regeneration capacity of soil seed banks of woody plant patches in conservation of the vegetation in an alpine habitat, since vegetation has completely disappeared in some sites by intensive grazing in the habitat. the study was done in mountainous area of alborz in iran. a total of 20 individual shrub...

rangeland ecosystem contains various patches with different functions. structural and functional characteristics of rangeland patches are changed by management practices and can be used to interpret management effects. the structural and functional characteristics of fertilized patches in two rangeland ecosystems of ghareh ghir and maraveh tapeh were measured and analyzed in this study. a group...

To encode binocular disparity, the visual system determines the image patches in one eye that yield the highest correlation with patches in the other eye. The computation of interocular correlation occurs after spatiotemporal filtering of monocular signals, which leads to restrictions on disparity variations that can support depth perception. We quantified those restrictions by measuring humans...