Published Date
For further details log on website :
https://www.cabdirect.org/cabdirect/abstract/20143179159
Foreign Title : Eficiência de extrato tânico combinado ou não com ácido bórico na proteção da madeira de
Author(s) : Calegari, L.; Lopes, P. J. G.; Santana, G. M.; Stangerlin, D. M.; Oliveira, E. de; Gatto, D. A.
Author Affiliation : CSTR, UFCG, Patos, PB, Brazil.
Author Email : calegari@cstr.ufcg.edu.br , pj.tm@hotmail.com , gregorioengflorestal@hotmail.com , stangerlin@ufmt.br , betholiveira12@gmail.com , darcigatto@yahoo.com
Journal article : Floresta 2014 Vol.44 No.1 pp.43-52 ref.29
ISSN : 0015-3826
Record Number : 20143179159
Abstract :
Among the methods tested to reduce the leaching of boron compounds in wood, it can be highlighted their combination with vegetable tannins. It is attributed the natural durability of some species of wood to vegetable tannins, pointing to their potentiality as natural wood preservatives. This research evaluated the efficiency of condensed tannins from bark of Mimosa tenuiflora extract with distilled water, compared to another extract added of sodium sulfite. It also evaluated the efficiency of sulfited tannin extracts, combined or not with boric acid in order to improve the resistance of Ceiba pentandraagainst the xylophagous termite Nasutitermes corniger by feeding test. Tannic extract obtained by adding sodium sulfite to distilled water revealed better yield compared to condensed tannin extraction. In general, impregnation of wood with tannin extract presented the same behavior as compared to application of boric acid, with best results observed when both them were simultaneously used. However, after applied to wood, tannin extracted was leachable and it did not favor the boric acid leaching. Despite the potential use of tannic extract against the xylophagous termite, additional studies are required for a best evaluation.
Among the methods tested to reduce the leaching of boron compounds in wood, it can be highlighted their combination with vegetable tannins. It is attributed the natural durability of some species of wood to vegetable tannins, pointing to their potentiality as natural wood preservatives. This research evaluated the efficiency of condensed tannins from bark of Mimosa tenuiflora extract with distilled water, compared to another extract added of sodium sulfite. It also evaluated the efficiency of sulfited tannin extracts, combined or not with boric acid in order to improve the resistance of Ceiba pentandraagainst the xylophagous termite Nasutitermes corniger by feeding test. Tannic extract obtained by adding sodium sulfite to distilled water revealed better yield compared to condensed tannin extraction. In general, impregnation of wood with tannin extract presented the same behavior as compared to application of boric acid, with best results observed when both them were simultaneously used. However, after applied to wood, tannin extracted was leachable and it did not favor the boric acid leaching. Despite the potential use of tannic extract against the xylophagous termite, additional studies are required for a best evaluation.
Location of publication : Curitiba
Country of publication : Brazil
Language of text : Portuguese
Language of summary : English
For further details log on website :
https://www.cabdirect.org/cabdirect/abstract/20143179159
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