Assessment of total phenols and extractives of mahogany wood by near infrared spectroscopy (NIRS)

Silva, Allan Ribeiro da; Pastore, Tereza Cristina Monteiro; Braga, Jez Willian Batista; Davrieux, Fabrice; Okino, Esmeralda Yoshico Arakaki; Coradin, Vera Teresinha Rauber; Camargos, José Arlete Alves; Prado, Alexandre G.S.

doi:10.1515/hf-2011-0207

Cited by 38 publications

(21 citation statements)

References 42 publications

(44 reference statements)

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“…The developed models are well-suited for screening of the ethanol and total extractives content. Da Silva et al [8] also assessed the total phenols and extractives of mahogany wood. The results indicated that NIRS can be a useful tool for a rapid evaluation of the extractive contents and total phenolic compounds of mahogany wood.…”

Section: Chemical Compositionmentioning

confidence: 99%

A review of recent application of near infrared spectroscopy to wood science and technology

2015

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This review article introduces recent scientific and technical reports due to near infrared spectroscopy (NIRS) at wood science and technology, most of which was published between 2006 and 2013. Many researchers reported that NIR technique was useful to detect multi traits of chemical, physical, mechanical and anatomical properties of wood materials although it was widely used in a state where characteristic cellular structure was retained. However, we should be sensitive and careful for application of NIRS, when spectra coupled with chemometrics presents unexpected good results (especially, for mechanical physical and anatomical properties). The real application for on-line or at-line monitoring in wood industry is desired as next step. Basic spectroscopic research for wooden material is also progressed. It should be a powerful and meaningful analytical spectroscopic tool.

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Section: Chemical Compositionmentioning

confidence: 99%

A review of recent application of near infrared spectroscopy to wood science and technology

2015

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“…Tree bark, for example, provides not only a physical protective barrier for plants, but also an important chemical defense mediated through the secondary compounds they produce (Horsfall 1980;Merrill 1992;Alfredsen et al 2008). Numerous studies recently conducted on bark extracts focus on tropical tree species (da Silva et al 2013;Kusumoto et al 2014;Salem et al 2015a;Yessoufou et al 2015). In the present study, we shift the focus onto Central European softwood species in the Pinaceae PEER-REVIEWED ARTICLE bioresources.com Salem et al (2016).…”

Section: Introductionmentioning

confidence: 99%

In vitro Bioactivity and Antimicrobial Activity of Picea abies and Larix decidua Wood and Bark Extracts

Salem

Elansary

Elkelish

et al. 2016

BioRes

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Picea abies and Larix decidua were subjected to GC/MS analyses, and antimicrobial (fungi and bacteria) assays of their stem wood and bark extracts were investigated. L. decidua bark extract exhibited the highest antifungal and antibacterial activities against the microorganisms that were screened. The microbes Penecillium ochrochloron and Aspergillus ochraceus were the most sensitive to the extracts, whereas Candida albicans was the most resistant fungus. L. decidua wood and bark did not exhibit much variation in their antibacterial activities, except against Micrococcus flavus and Pseudomonas aeruginosa. The bacterium most sensitive to the extracts was Escherichia coli, whereas the most resistant was M. flavus. 13-epimanool and α-cedrol were the main components of P. abies wood extract. The main components in its bark were abietic acid, astringin, dehydroabietic acid, and α-terpineol. The main chemical compounds in L. decidua wood extract were abietic acid, oleanolic acid, duvatrienediol, and larixol. The main chemical compounds in its bark were (-)-2,9-dihydroxyverrucosane and larixol. The study revealed that P. abies and L. decidua stem wood and bark extracts contain several compounds that have antimicrobial activities towards diverse human pathogenic, food, and agricultural microbes. These results might guide in future searches for novel natural products with chemotherapeutic uses. (El-Shatby), Alexandria University, Alexandria, Egypt; b: Molecular Biology Laboratory, Floriculture, Ornamental Horticulture and Garden Design Department, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria, Egypt; c: Department of Botany, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt; d: Department of Wood Processing, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic; e: Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; f: Department of Timber Trees Research, Sabahia Horticulture Research Station, Horticulture Research Institute, Agriculture Research Center, Alexandria, Egypt; g: Department of Environmental Sciences, University of South Africa, Florida campus, Florida 1710, South Africa; * Corresponding author: zidan_forest@yahoo.com; mohamed-salim@alexu.edu.eg Keywords: Picea abies; Larix decidua; Antifungal activity; Antibacterial activity; GC/MS Contact information: a: Department of Forestry and Wood Technology, Faculty of Agriculture INTRODUCTIONForestry residues such as tree barks and branches are important but underexplored supplies of biologically or pharmaceutically active compounds (Liimatainen et al. 2012;Si et al. 2012;Patinha et al. 2013). Tree bark, for example, provides not only a physical protective barrier for plants, but also an important chemical defense mediated through the secondary compounds they produce (Horsfall 1980;Merrill 1992;Alfredsen et al. 2008). Numerous studies recently conducted on bark extracts focus on tropical tree spec...

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“…Várias técnicas estão sendo estudadas e adaptadas para esse fim, tais como: espectroscopia de massas, determinação de isótopos estáveis, rá-dio-carbono, técnicas com DNA, espectroscopia no infravermelho próximo (NIRS, do inglês Near Infrared Spectroscopy), etc. [3][4][5][6][7][8][9][10] A tecnologia NIRS, espectroscopia associada à analise multivariada dos espectros, permite a aquisição direta de medidas de reflectância que carregam informação dos diversos grupos funcionais presentes nas moléculas de alto peso (celulose, hemicelulose e lignina) e de menor peso molecular (extrativos) da madeira. 11 Além disso, trazem informações físicas e anatômicas, referentes à distribuição desses constituintes químicos na superfície, tornando-se uma "impressão digital" de cada espécie florestal produtora de madeira.…”

Section: Introductionunclassified

“…12 Surge, assim, a necessidade da aplicação de métodos quimiométri-cos como o de análise de componentes principais (PCA, do inglês Principal Component Analysis), regressão por mínimos quadrados parciais (PLSR, do inglês Partial Least Squares Regression), análise discriminante linear (LDA, do inglês Linear Discriminant Analysis), etc. [4][5][6][7][8][9][10] Esses modelos podem, então, ser utilizados para análises qualitativas ou quantitativas, dependendo dos objetivos ou do método quimiométrico empregado, de uma amostra em análise de rotina.…”

Section: Introductionunclassified

Avaliação de espectrômetro NIR portátil e PLS-DA para a discriminação de seis espécies similares de madeira amazônicas

Soares¹,

Silva²,

Bergo³

et al. 2017

Quim. Nova

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AMAZONIAN WOOD SPECIES. Supervising wood exploitation can be very challenging due to the existence of many similar species and the reduced number of wood identification experts to meet the demand. There is evidence that valuable endangered wood species are being smuggled disguised as other species. Near infrared spectroscopy (NIRS) and chemometrics has been successfully used to discriminate between Amazonian wood species using high resolution instruments. In this study, a handheld spectrometer was evaluated for the discrimination of six visually similar tropical wood species using PLS-DA. Woods of mahogany (Swietenia macrophylla) and cedar (Cedrela odorata), both high value tropical timber species included in Appendixes II and III of the CITES, respectively; crabwood (Carapa guianensis); cedrinho (Erisma uncinatum); curupixá (Micropholis melinoniana); and jatobá (Hymenea coubaril). The data for model development and validation take into account both laboratory and field measurements. Outlier exclusion was performed based on Hotelling T 2 , residuals Q and errors in the estimated class values. The efficiency rates were higher than 90% for all species, showing that the handheld NIR combined with PLS-DA succeeded in discriminate between these species. These results stimulate the application of handheld NIR spectrometers in the supervision of wood exploitation, which can contribute to the species preservation.Keywords: mahogany; cedar; crabwood; NIR; PLS-DA; amazon woods. INTRODUÇÃOA exploração e comercialização de madeiras ilegais contribuem para o crescimento contínuo das taxas de desmatamento das florestas Amazônica e demais do globo terrestre. Atualmente, há um esforço de várias instituições internacionais para combater a exportação de madeira ilegal, que envolve cifras da ordem de bilhões de dólares anuais, respeitando a legislação existente em cada país. Tal esforço tem como finalidades controlar, proibir ou desmotivar a exploração seletiva de espécies florestais produtoras de madeira ou de uma área específica explorada. 1 Apesar de todo o empenho, existe carência em resolver uma questão básica e primordial, a de identificar rapidamente e de maneira confiável, a qual espécie florestal pertence a madeira que está sendo inspecionada. Para a identificação da madeira, geralmente desprovida de qualquer material botânico, da forma como ela é transportada e comercializada, fiscais e agentes ambientais treinados recorrem ao método convencional de anatomia de madeira, que compara os caracteres anatômicos e morfológicos da madeira examinada com a madeira de padrões depositados em xilotecas registradas.2 As chaves de identificação, eletrônicas ou não, reúnem informações anatômica e física da madeira e facilitam a análise anatômica.3 Contudo, ainda é necessária elevada experiência do analista para a aplicação do método com o nível de confiança necessário para realizar uma apreensão de carga ilegal. Adicionalmente, apesar dos ótimos resultados apresentados pelo método anatômico, em muitas regiões e postos de fiscalização n...

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Assessment of total phenols and extractives of mahogany wood by near infrared spectroscopy (NIRS)

Cited by 38 publications

References 42 publications

A review of recent application of near infrared spectroscopy to wood science and technology

A review of recent application of near infrared spectroscopy to wood science and technology

In vitro Bioactivity and Antimicrobial Activity of Picea abies and Larix decidua Wood and Bark Extracts

Avaliação de espectrômetro NIR portátil e PLS-DA para a discriminação de seis espécies similares de madeira amazônicas

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