O modelo ondulatório da luz como ferramenta para explicar as causas da cor

Scarinci, Anne Louise; Marineli, Fábio

doi:10.1590/s1806-11172014000100009

Cited by 8 publications

(10 citation statements)

References 8 publications

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“…38 These characteristics can promote a better control of sunscald since the white color reflected the solar radiation and absorbed less energy, which contributed to the reduction of the temperature of the epidermises of plant tissues. 39 The pH values of the emulsions were affected by the addition of AH, which did not significantly affect LB, Fig. 1(D) and Table S1.…”

Section: Development Of the Formulationsmentioning

confidence: 92%

Production of mycosporine‐like amino acid (MAA)‐loaded emulsions as chemical barriers to control sunscald in fruits and vegetables

et al. 2021

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BACKGROUND Sunscald is a physiological disorder that occurs in many horticultural products when exposed to excessive solar radiation and high temperatures. Traditionally, sunscald is controlled using physical barriers that reflect radiation, however this practice is not always efficient. A possible alternative would be the use of chemical barriers, such as mycosporine‐like amino acids (MAAs), which protect aquatic organisms against ultraviolet (UV) radiation. Thus, this study aimed to develop a lipid‐based emulsion containing MAAs for using in the preharvest of horticultural products. RESULTS Emulsions were developed using 10% (w/v) of corn oil (CO) and soybean oil (SO), carnauba wax (CW), and beeswax (BW) as lipid bases (LBs). The emulsion containing CW and ammonium hydroxide was the most stable, resembling commercial wax. Therefore, this formulation was used as the basis for the incorporation of the commercial product Helioguard™ 365, a source of MAA, in concentrations of 0%, 1%, 2%, and 4% (v/v). The MAA incorporation resulted in little modifications in the stability of the emulsion, providing an increase in the absorbance with peaks in the UV‐B ranging from 280 to 300 nm. CONCLUSION The lipid‐base emulsion containing MAAs could be used as a chemical barrier to control sunscald in horticultural products. © 2021 Society of Chemical Industry.

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Section: Development Of the Formulationsmentioning

confidence: 92%

Production of mycosporine‐like amino acid (MAA)‐loaded emulsions as chemical barriers to control sunscald in fruits and vegetables

et al. 2021

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“…Fig. 3 -São mostrados 6 espectros de emissão diferentes, mas que produzem a mesma sensação visual da cor roxa (SCARINCI, 2014).…”

Section: Iii3 Neuro Processamento Visualunclassified

“…E mais, mesmo acrescentando a compreensão das proteínas fotorreceptoras e os seus processos biológicos, a compreensão do porque enxergamos o que enxergamos deve incluir o que acontece na interação olho-cérebro (NASSAU, 2001). Está sediado no cérebro a percepção de cores e contrastes que não necessariamente refletem a realidade física do que se está vendo (SCARINCI, 2014).Uma vez posta a problemática, resta a dúvida: por qual motivo nosso sistema visual (olho-cérebro) é como é? Parece estar bem estabelecido que problemas dessa natureza só podem ser resolvidos à luz da teoria da evolução (MAYR, 2009).…”

Section: Introductionunclassified

Aspectos sobre a visão humana em uma abordagem interdisciplinar no ensino médio

Coelho

2021

Cad. Bras. Ens. Fís.

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Inspirado na leitura de Japiassu (1976) sobre interdisciplinaridade, este trabalho explora a possibilidade de uma abordagem psicobiofísica no estudo da visão humana em salas de aula de ensino médio, dentro do contexto da disciplina de física. Uma abordagem que se vale de conhecimentos das neurociências (relação entre processos bioquímicos e o processamento visual), da biologia (sobretudo a teoria da evolução biológica) e da física (interação luz-matéria). Isto é feito de maneira tal que a compreensão sobre os conceitos físicos concernentes à física ondulatória seja indispensável. Como eixo integrador dessa abordagem, utilizamos a teoria da evolução biológica que se entende ser a teoria mais adequada para se compreender a complexidade que envolve o funcionamento da visão humana. Aproveito o ensejo para elencar alguns conceitos centrais desta teoria (tais como seleção natural, população, indivíduo, fenótipo, genótipo) com a finalidade de estabelecer base suficientemente sólida para que um professor de física que atue no ensino médio seja capaz de promover uma discussão competente sobre o tema.

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“…Soil color is an easily measured attribute and has been used to estimate other attributes (Aitkenhead et al., 2018; Gholizadeh et al., 2020; Morais et al., 2020; Saad Hajjar et al., 2020; Viscarra Rossel et al., 2008), allowing the mapping of large areas. Color is a characteristic expressed by the perception of light reflected from objects to human eyes (Scarinci & Marineli, 2014). Soil color is given mainly according to the contents of Fe oxides and organic matter (Fernandez & Schulze, 1992).…”

Section: Introductionmentioning

confidence: 99%

Soil mineralogical attributes estimated by color as accessed by proximal sensors and machine learning

Baldo

Marques

Fernandes

et al. 2021

Soil Science Soc of Amer J

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Detailed mapping is essential for land use and management planning. The mappings require a robust database. Costs and time associated with obtaining the database are high and, therefore, it is not always possbile to obtain it. Soil color is a pedoindicator attribute that can be easily characterized. This study aimed to use soil color, based on the RGB (red–green–blue) system and obtained by diffuse reflectance spectroscopy (DRS) and mobile proximal sensor (MPS) to estimate mineralogical attributes using machine learning techniques for the Western Plateau of São Paulo. A total of 600 samples were collected throughout the study area. The samples were analyzed by DRS and then photographed. The color data were obtained by the RGB system after analysis in a computer program. The samples were subjected to laboratory analysis to quantify the contents of crystalline and noncrystalline Fe, hematite, goethite, kaolinite, and gibbsite. The database was subjected to the random forest machine learning algorithm and geostatistics. The use of random forest allowed estimating soil mineralogical attributes based on the RGB system by DRS and MPS. Detailed maps of mineralogical attributes could be constructed using the RGB system by the DRS and MPS techniques. The MPS technique can be used to characterize soil color, reducing the costs associated with analysis and the time required for data collection.

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O modelo ondulatório da luz como ferramenta para explicar as causas da cor

Cited by 8 publications

References 8 publications

Production of mycosporine‐like amino acid (MAA)‐loaded emulsions as chemical barriers to control sunscald in fruits and vegetables

Production of mycosporine‐like amino acid (MAA)‐loaded emulsions as chemical barriers to control sunscald in fruits and vegetables

Aspectos sobre a visão humana em uma abordagem interdisciplinar no ensino médio

Soil mineralogical attributes estimated by color as accessed by proximal sensors and machine learning

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