SciELO - Scientific Electronic Library Online

 
vol.88 número4On non-Kupka points of codimension one foliations on ℙ3Barium and its Importance as an Indicator of (Paleo)Productivity índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google
  • uBio

Compartilhar


Anais da Academia Brasileira de Ciências

versão impressa ISSN 0001-3765versão On-line ISSN 1678-2690

Resumo

KADIR, ROSZAINI  e  JANTAN, MOHD D.. Enhancement of Hevea brasiliensis properties through chemical application. An. Acad. Bras. Ciênc. [online]. 2016, vol.88, n.4, pp.2081-2092. ISSN 0001-3765.  http://dx.doi.org/10.1590/0001-3765201620150650.

The effects of four different types of bleaching agents (hydrogen peroxide, sodium hypochlorite, sodium chlorite and oxalic acid) mixed together with 2% boron-based preservative (Celbor SP) were studied on green sawn rubberwood. Two concentration levels (1% and 2%) of were used. Whitish values (W) and colour changes (ΔE) of sawn rubberwood were assessed before and after chemical treatment using a colour meter. Preliminary observation indicated that timber treated with 1% and 2% hydrogen peroxide produced better and more homogeneous colour properties. Hydrogen peroxide treated timber gave higher whitish values (6.23 and 9.91 for 1% and 2% solution, respectively) and lower colour changes (8.49 and 5.51 for 1% and 2% solution, respectively) when compared to the other three chemicals. Evaluation on the effects of bleaching (hydrogen peroxide with a higher level of concentration) on physical, mechanical and biological properties of rubberwood also have been determined in this study.

Palavras-chave : Hevea brasiliensis; bleaching agents; physical; mechanical; biological properties.

        · texto em Inglês     · Inglês ( pdf epdf )