COMPOSIÇÃO QUÍMICA DA MADEIRA DE<i> Cordia trichotoma</i> (Vell.) Arráb. ex Steud.

Abstract

RESUMOHá variações nas composições químicas, físicas e na anatomia da madeira, entre espécies e também dentro da mesma espécie, as quais variam significativamente com a altura do tronco e na direção da medula até a casca. O objetivo do presente trabalho foi analisar a composição química da madeira de Cordia trichotoma. Foram analisadas três árvores, coletadas na Região Noroeste do Estado do Rio Grande do Sul, das quais foi retirado um disco de madeira localizado próximo da base. Quantificou-se o teor de cinzas e de extrativos pela norma TAPPI e o óleo essencial foi extraído usando o método por arraste de vapor. Também foram determinados os elementos químicos presentes nas amostras de madeira, na sua forma natural, e moída, por espectrometria de fluorescência de raios-X por energia dispersiva -EDXRF. A madeira de Cordia trichotoma apresentou teores médios de cinzas e de extrativos totais de 1,39% e 28,22%, respectivamente. Na composição química do óleo essencial foi possível a identificação de dois principais componentes do óleo o α-cadinol e do α-muurolol. Os elementos minerais mais abundantes foram o potássio, cálcio, magnésio, fósforo, enxofre e silício. O ferro foi o elemento com menor concentração encontrado na madeira pela técnica de análise utilizada. Palavras-chave: louro-pardo; química da madeira; óleos essenciais. ABSTRACTThere are variations in the chemical, physical and anatomy composition of wood, also among species and within species, which vary significantly with the height of the trunk and towards the bone to the shell. The objective of this study was to analyze the chemical composition of wood of Cordia trichotoma. Three tree samples were analyzed, collected in the northwest region of Rio Grande do Sul state, of which a wooden disc has been withdrawn located near the base. The ash and extractives by TAPPI were quantified and the essential oil was extracted using the method for drag steam. There were also certain chemical elements present in the wood samples, in its natural form, milled, and by spectrometry fluorescence X-ray energy dispersive -EDXRF. The wood of Cordia trichotoma showed average levels of ash and extractives of 1.39% and 28.22%, respectively. In the chemical composition of the essential oil, it was possible to identify two main oil components the α-cadinol and α-muurolol. The most abundant mineral elements were potassium, calcium, magnesium, phosphorus, sulfur and silicon. The iron was the element with lowest concentration found in the wood by the analysis technique used.

Cytotoxicity of Essential Oil Cordia verbenaceae against Leishmania brasiliensis and Trypanosoma cruzi

“…Within the Cordia genus , there is a certain variation in the predominance of certain components of essential oils. Some species mainly contain monoterpene hydrocarbons common to C. cylindrostachia [ 50 ], C. globosa [ 51 ]; some sesquiterpene hydrocarbons, as seen in C. verbenacea [ 6 ], C. leucocephala [ 52 ] and C. millenii [ 53 ]; a mixture of monoterpene hydrocarbons and sesquiterpenes prominent in C. trichotoma [ 54 ] and C. multispicata [ 55 ]; oils containing oxygenated monoterpenes/sesquiterpenes, such as C. myxa [ 56 ] and C. chacoensis [ 57 ], respectively; and oils with a high content of non-terpenes, present in C. sebestena [ 58 ] and C. gilletii [ 59 ].…”

VEGETATIVE PROPAGATION OF Cordia trichotoma (VELL.) ARRAB. EX STEUD. BY CUTTINGS FROM SHOOTS AND ROOTS

“…From initial secondary to late secondary succession group, cordia can be found in Submontane Semidiciduous Seasonal Forest, Deciduous Seasonal Forest, Dense Ombrophyllus Forest and Subtropical Ombrophylous Forest (Reitz et al, 1988). Cordia has potential for commercial forest plantation, because the species presents good trunk form and excellent wood quality (Carvalho, 2002) presenting average levels of ash and plant extractives (Wille et al, 2017).…”