Colorimetria aplicada à ciência e tecnologia da madeira

Júnior, Eraldo Antonio Bonfatti; Lengowski, Elaine Cristina

doi:10.4336/2018.pfb.38e201601394

Cited by 12 publications

(6 citation statements)

References 68 publications

(73 reference statements)

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“…The use of instrumental techniques for quantifying color in products has been used for several decades, and the use of color space for this characterization seems appropriate for germplasm phenotyping (Jackson et al, 2018;. The CIE LAB color space and other color spaces have been used successfully to quantify color parameters in various plant species, such as sweet potato (Jackson et al, 2018;, bean (Kläsener et al, 2020), fruits (Gentallan et al, 2019), forest species (Bonfatti-Júnior and Lengowski, 2018), and medicinal plants (Gasparin et al, 2014). An objective color classification scale for triticale grains can be applied in the breeding program routine, especially in the characterization of germplasm or evaluation of a complementary characteristic of competition tests.…”

Section: Resultsmentioning

confidence: 99%

“…Color is a trait that is difficult to assess, as it is affected by the perception of each individual, and also has a subjective nature. In this context, quantitative colorimetry has been used to characterize the color of several plant species successfully (Jackson et al, 2018;Kläsener et al, 2020;Gentallan et al, 2019;Bonfatti-Júnior and Lengowski, 2018). One of the most used colorimetric methods is the CIE LAB system, which was described in 1976 and considers three spatial axes (L, a*, and b*) perpendicular to each other, whose points provide more uniform numerical differences relative to visual differences (Commission Internationale de l'Eclairage, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Use of quantitative colorimetry and visual evaluation for color characterization of triticale seeds after phenol reaction

Buratto¹,

Fernandes

Rosa³

et al. 2021

J. Seed Sci.

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Quantitative colorimetry can be used to characterize the color of triticale seeds submitted to the phenol test. This study aimed to characterize the color of triticale seeds after the phenol test by visual color evaluation and quantitative colorimetry using the CIELAB color space. The evaluated seeds came from 88 triticale genotypes from the IDR-Paraná Germplasm Bank. The colorimetric data for L (lightness) and chromaticity coordinates a* and b* of the seeds before and after phenol reaction were obtained using a Minolta CR-400 colorimeter. The score scale ranged from 1 (very weak or absent color) to 9 (very dark color) and evaluated visually the seed color after phenol reaction. Seeds classified as score 1 showed mean values of 46.3, 6.6, and 16.4 for L, a*, and b*, respectively. On the other hand, seeds classified as dark or very dark showed values equal to or lower than 28.4 for L, 5.6 for chromaticity a*, and 6.0 for chromaticity b*. The use of colorimetric parameters showed a practical application and low subjectivity in the classification of the color of triticale seeds after phenol reaction.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of quantitative colorimetry and visual evaluation for color characterization of triticale seeds after phenol reaction

Buratto¹,

Fernandes

Rosa³

et al. 2021

J. Seed Sci.

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“…The L* value serves as an indicator of wood lightness or darkness [43]; wood with L* greater than 56 is considered light [44]. The wood of S. amara is very light, with an L* value of 81.37 on a scale ranging from 0 to 100.…”

Section: Colorimetrymentioning

confidence: 99%

A Comparative Analysis of Tannin and Commercial Fire Retardants in Wood Fire Protection

Bonfatti Júnior,

de Barros,

Silva

et al. 2024

Forests

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In civil construction, one of the primary challenges associated with wood application is its high flammability and low durability during fires. Although chemical treatment with fire-retardant properties exists, they are expensive and of non-renewable origin. Tannin, a wood extractive, being a phenolic compound, holds promise for enhancing the thermal properties of wood. This study aimed to assess the efficacy of tannin as a fire retardant and compare it with a commercial product, as well as comparing different application techniques for these products. Wood samples from the Simarouba amara Aubl. species were utilized. Tannin and a commercial flame retardant were applied via immersion, vacuum impregnation, brushing, and a treatment of tannin incorporated into water-based wood varnish. Alongside the burning test performance, assessments of the wood’s physical properties, such as colorimetry, thermal stability, and mass retention, were conducted. The application of tannin altered the wood’s color and reduced the spread of fire; its presence significantly reduced the flame duration and maintained the wood’s structural integrity. However, tannin retention was lower compared to commercial flame retardant, leading to reduced fire retardancy. Among the methods tested, immersion proved to be the most effective in enhancing the wood’s resistance to flame contact.

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“…Espectrofotômetros e colorímetros são dois tipos comuns de equipamentos apropriados para descrever numericamente elementos da composição de cor em superfícies (Gonçalez et al, 2001;Bonfatti Júnior & Lengowski, 2018). O espectrofotômetro de refletância fornece a curva de distribuição de refletância da amostra, enquanto que o colorímetro separa as componentes RGB da luz, funcionado de forma análoga ao sistema visual humano.…”

Section: Colorimetriaunclassified

Métodos De Melhoramento Genético Adotados Pelos Criadores De Caprinos Na Ilha De São Luís-Ma

Martins¹,

Souza²,

Silva³

et al. 2023

Ciências Veterinárias: Patologias, Saúde E Produção Animal

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Editora Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterála de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético. Conselho Editorial Ciências Agrárias e Multidisciplinar

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Colorimetria aplicada à ciência e tecnologia da madeira

Cited by 12 publications

References 68 publications

Use of quantitative colorimetry and visual evaluation for color characterization of triticale seeds after phenol reaction

Use of quantitative colorimetry and visual evaluation for color characterization of triticale seeds after phenol reaction

A Comparative Analysis of Tannin and Commercial Fire Retardants in Wood Fire Protection

Métodos De Melhoramento Genético Adotados Pelos Criadores De Caprinos Na Ilha De São Luís-Ma

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