Cruz Mariluze P

Publications (3)0 Total impact

• Source

  Available from: Luiz Claudio de Almeida Barbosa

  Article: Caracterização química do "pitch" em indústria de celulose e papel de Eucalyptus

  Cruz Mariluze P, Barbosa Luiz C. A, Maltha Célia R. A, Gomide José L, Milanez Augusto F
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  ABSTRACT: The chemical analysis of the acetone, chloroform, toluene and methanol extracts of a pitch sample was carried out by IR and GC-MS, leading to the identification of sixty nine compounds, including fatty acids, alcohols and hydrocarbons. Analysis of the acetone extractive of a eucalyptus wood used in Brazil for pulp production was also carried out, resulting in identification of fifty nine compounds, including mainly fatty acids, phenolic compounds, beta-sitosterol and other steroids. This analysis showed that pitch formation had a contribution from wood extractives and other sources of contamination. The results obtained and the methodology applied can be used by the pulp industry to develop new methods of pitch control.
  Química Nova. 01/2006;
• Article: Constituintes químicos de Bombacopsis glabra (bombacaceae)

  Paula Vanderlúcia F, Cruz Mariluze P, Barbosa Luiz C. de A
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  ABSTRACT: The chemical study of the barks of the stem and roots of Bombacopsis glabra (Bombacaceae) led to the isolation and identification of 5-hydroxy-3,7,4'-trimethoxyflavone (1), 5-hydroxy-3,6,7,4'-tetramethoxyflavone (2), the naphtoquinone isohemigossypolone (3), the ester triacontil p-coumarate (4) besides lupeol and a mixture of beta-sitosterol and stigmasterol. Their structures were elucidated by spectroscopic analysis, including IR, ¹H and 13C NMR and MS. All these compounds, except 3, were isolated for the first time in the family.
  Química Nova. 01/2006;
• Source

  Available from: Luiz Claudio de Almeida Barbosa

  Article: Chemical Constituents from Bombacopsis glabra (Pasq.) A. Robyns: Complete 1H and 13C NMR Assignments and X Ray Structure of 5-Hydroxy-3,6,7,8,4'-pentamethoxyflavone

  Paula Vanderlúcia F, Barbosa Luiz C. A, William Errington, Howarth Oliver W, Cruz Mariluze P
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  ABSTRACT: The flavone 5-hydroxy-3,6,7,8,4'-pentamethoxyflavone (1) and the triterpenes lupenone, 9,19-cyclolanost-23-ene-3beta,25-diol (2), (24R)-9,19-cyclolanost-25-ene-3beta,24-diol (3) and (24S)-9,19-cyclolanost-25-ene-3beta,24-diol (4) were isolated from the hexane extract of the stem bark of Bombacopsis glabra (Bombacaceae). The structures were determined by 13C and ¹H NMR (1D and 2D) and mass spectrometry, and by comparison with literature data for triterpenes. The structure of the flavone 1 was unambiguously confirmed by a X-ray diffraction study. The five substances were isolated for the first time from Bombacaceae species.
  Journal of the Brazilian Chemical Society. 01/2002;