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White mold detection in common beans through leaf reflectance spectroscopy REA
Machado,Marley L.; Pinto,Francisco de A. C.; Paula Junior,Trazilbo J. de; Queiroz,Daniel M. de; Cerqueira,Ozires de A. T..
ABSTRACT This study aimed to identify wavelengths based on leaf reflectance (400-1050 nm) to estimate white mold severity in common beans at different seasons. Two experiments were carried out, one during fall and another in winter. Partial Least Squares (PLS) regression was used to establish a set of wavelengths that better estimates the disease severity at a specific date. Therefore, observations were previously divided in two sub-groups. The first one (calibration) was used for model building and the second subgroup for model testing. Error measurements and correlation between measured and predicted values of disease severity index were employed to provide the best wavelengths in both seasons. The average indexes of each experiment were of 5.8% and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sclerotinia sclerotiorum; PLS regression; Pigments; Spectrum; Absorption.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601117
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Analysis of the Beach Face with High-Frequency Oscillations and Dynamic Functions in the Swash Zone in the Houjiang Beach of Guangdong Province. OceanDocs
Feng, Yanqing; Chen, Zishen; Li, Zhilong; Li, Zhiqiang.
Using the data of beach face high oscillations and waves and flows of the surf zones influenced by the swells, the characteristics including beach face variation trends, trend shapes, oscillation periods, oscillation intensions of different profile shapes, and the characteristic relations between different stake points on the same profile were analyzed comparatively. The relations between the beach face with high oscillations erosion and sediment and the surf zone infragravity waves were also analyzed based on the cross spectrum analysis. The results showed that the swash diffluences caused by the beach cusp rhythm topography hasten the sediment transport from the beach ridge to beach paddy, and the beach face of the swash zones has the infragravity...
Tipo: Journal Contribution Palavras-chave: Swash; Waves (water); Spectrum.
Ano: 2008 URL: http://hdl.handle.net/1834/5868
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Study of phycocyanin production from Spirulina platensis under different light spectra BABT
Walter,Alfredo; Carvalho,Júlio Cesar de; Soccol,Vanete Thomaz; Faria,Ana Bárbara Bisinella de; Ghiggi,Vanessa; Soccol,Carlos Ricardo.
The aim of this work was to investigate the production of phycocyanin by Spirulina platensis under different spectra of light. The dependent variables evaluated were the amount of phycocyanin obtained and its purity, demonstrating that there might be a restructuring of phycobilisomes, especially when the culture was subjected to red light, which increased the purity level up to 33% with a reduction of 16% in phycocyanin content, but with higher photosynthetic efficiency compared to natural light.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Spirulina; Phycocyanin; Phycobilisome; Pigment; Spectrum; Chromatic acclimation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400005
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