https://ri.ufs.br/jspui/handle/riufs/8506 2026-05-03T11:42:43Z 2026-05-03T11:42:43Z Santos, Jorge Artur https://ri.ufs.br/jspui/handle/riufs/24609 2026-02-20T12:55:13Z 2025-12-10T00:00:00Z

Título: Uso do Método Opará para determinação da qualidade da superfície da madeira Autor(es): Santos, Jorge Artur

2025-12-10T00:00:00Z Fernandes, Fernanda Luíza dos Santos https://ri.ufs.br/jspui/handle/riufs/24608 2026-02-20T12:52:54Z 2024-05-09T00:00:00Z

Título: Potencial produtivo, comportamento e desenvolvimento precoce de materiais genéticos de eucalipto para o litoral do estado de Sergipe Autor(es): Fernandes, Fernanda Luíza dos Santos

2024-05-09T00:00:00Z Reis, Keliane de Jesus https://ri.ufs.br/jspui/handle/riufs/24607 2026-02-20T12:51:20Z 2026-02-04T00:00:00Z

Título: Relação do desgaste da ferramenta de corte com a qualidade superficial da madeira usinada Autor(es): Reis, Keliane de Jesus Abstract: Understanding the behavior of wood is essential for achieving greater control over the machining process and, consequently, obtaining adequate surface quality. Therefore, the present study aimed to analyze the surface based on surface roughness throughout the natural wear of the tool, monitor the sharpening life of the tool edge, and determine its critical point according to the need for rework. For this purpose, five types of wood were used and were subjected weekly to the cutting process with a new circular saw, whose edges were photographed at each cutting stage for later analysis of their angles. Surface quality was evaluated through roughness using the Ra parameter. The results show that for all evaluated species, as the cutting tool edges wear out, the machined wood surface quality decreases, as do the angle values of the tool edges, resulting in poorer surface quality. However, after sharpening the tool teeth, the tool once again provided low Ra values. In conclusion, the wear of the cutting tool influences the surface quality of the machined wood, the deterioration of the tool angle had a negative effect on the surface quality of the machined wood, and the critical sharpening point of the circular saw edges occurred between the 3rd and 4th evaluation based on the need for rework of the machined wood.

2026-02-04T00:00:00Z Santana, Gabriella de Morais https://ri.ufs.br/jspui/handle/riufs/23722 2025-11-04T15:03:10Z 2025-09-08T00:00:00Z

Título: Uso do biocarvão em substratos de mudas de espécies florestais nativas do Brasil Autor(es): Santana, Gabriella de Morais Abstract: Biochar, also known as biochar, is a carbon-rich material obtained through the pyrolysis of organic residues and has been widely studied as a substrate conditioner, aiming at physical, chemical, and biological improvements in the soil. This study aimed to conduct a systematic review on the use of biochar in the production of seedlings of native forest species, highlighting its effects on plant growth and quality. Searches were conducted in the CAPES Periodicals Portal, Google Scholar, and SciELO databases, using combinations of keywords in Portuguese and English, with no date restrictions. After screening and removal of duplicates, 13 articles were selected that directly addressed the application of biochar in substrates for native forest species. The analyzed studies covered different species, such as rosewood, Brazil nut tree, angico, paricá, faveira, acacia, soapberry, pau-ferro, macaúba, araçá, cajuzinho-do-cerrado, and jurema-preta, employing various biochar sources and combinations with chemical and organic inputs. Applications varied as a percentage of substrate volume or as fixed doses per hectare. Morphological parameters (height, diameter, dry mass, number of leaves, Dickson Quality Index) and physiological parameters (photosynthesis, transpiration, stomatal conductance, nutrient concentration) were evaluated. The results were classified as satisfactory, unsatisfactory, or partially satisfactory. Five studies presented consistent positive responses, three showed no significant benefits, and five exhibited variable responses, indicating that the effectiveness of biochar depends on factors such as species, type and dosage used, as well as its combinations with other inputs. It is concluded that biochar has promising potential in the production of native seedlings, contributing to nutritional and structural improvements in the substrate, although its effectiveness is not uniform among all tested species and conditions. Expanding research and standardizing methodologies may favor the optimized use of this input in restoration programs and sustainable forest production.

2025-09-08T00:00:00Z