6 documents found, page 1 of 1
Tribomechanical Comparison between PVA Hydrogels Obtained Using Different Proce...
Oliveira, AS; Seidi, O; Ribeiro, NA; Colaço, R; Serro, APDesigning materials for cartilage replacement raises several challenges due to the complexity of the natural tissue and its unique tribomechanical properties. Poly(vinyl alcohol) (PVA) hydrogels have been explored for such purpose since they are biocompatible, present high chemical stability, and their properties may be tailored through different strategies. In this work, the influence of preparation conditions...
Irrigating Cork Oaks Trees – First Insights on Growth and Stripping
Dinis, C; Camilo-Alves, C; Vaz, M; Mota Barroso, J; Ribeiro, NACork oak (Quercus suber L.) trees have a high environmental value already well documented in the literature. Also, its socio-economical value is recognized due to their ability to produce cork, which is renewable every 9 years. However, high cork oak mortality rates are being observed since last decades in all Mediterranean basis. The lack of regeneration and well-structured forest stands with trees of differen...
Cork oak Transplant: A new reality?
Dinis, C; Valverde, P; Camilo-Alves, C; Ribeiro, NA; Vaz, MCork oak tree (Quercus suber L.), in Portugal, is considered the national tree and have special demands and legal protection when dealing with silviculture management (pruning, debarking, thinning). Being a species of slow growth, cork oak transplanting procedures can be a valuable asset either from the economic or ecological rationales to relocate trees, re-populate areas affected by high tree mortality, incre...
Inventário mortalidade da Azinheira sobre fotografia aérea digital 2004/2006.
Ribeiro, NA; Surový, P; Camilo-Alves, C; Dias, SInventário NAcional da Mortalidade da Azinheira fotografia aérea digital 2004/2006.
The effect of soil compaction at different depths on cork oak seedling growth
Dinis, C; Surový, P; Ribeiro, NA; Oliveira, MRGSoil compaction promoted either by inadequate management (pressure of livestock and machinery) or by soil natural conditions (podzolisation) can influence the growth of cork oak seedlings. We hypothesized that compaction could be related with the lack of natural regeneration and decline on cork oak stands. In this paper, we evaluated the response of cork oak seedlings growth in terms of area and biomass product...
Importance of automatic threshold for image segmentation for accurate measureme...
Surový, P; Dinis, C; Marusak, R; Ribeiro, NAThe fine roots are considered the key organs for plant survival, growth and productivity. Measurement of fine roots variables is easily and conveniently achieved by means of digital image. The descriptive variables like root area, surface, total length and diameter distribution may be obtained from the image. Analysis of digital image consists from several steps, each of them represents potential source of the ...