|
|
|
|
| |
|
|
| Restaino,Ernesto A; Fernández,Enrique G; La Manna,Alejandro; Cozzolino,Daniel. |
| The aim of this study was to investigate the use of near infrared reflectance (NIRS) spectroscopy to predict the nutritive value of silages from pastures and to assess the effect of silage structure type (e.g. bunker and bag silos) on the NIRS predictions. Samples (n = 120) were sourced from commercial farms and analyzed in a NIRS monochromator instrument (NIR Systems, Silver Spring, Maryland, USA) using wavelengths between 400 and 2500 nm in reflectance. Calibration models were developed between chemical and NIRS spectral data using partial least squares (PLS) regression. The coefficients of determination in calibration (R²) and the standard error in cross validation (SECV) were 0.73 (SECV: 1.2%), 0.81 (SECV: 2.0%), 0.75 (SECV: 6.6%), 0.80 (SECV: 6.7%),... |
| Tipo: Journal article |
Palavras-chave: Silage; Nutritive value; Near infrared reflectance spectroscopy; Pastures. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000400011 |
| |
|
|
| Garcia,Jaime; Cozzolino,Daniel. |
| The objective of the study was to evaluate the potential of near infrared reflectance (NIR) spectroscopy as a rapid method to predict the chemical composition of forage in broad-based calibration models. In total, 650 samples representing a wide range of chemical characteristics, phenological states and origins were scanned in an NIR instrument. The coefficient of determination in calibration (R²) and standard error in cross validation (SECV) for the NIR calibration models were as follows: dry matter 0.95 (SECV: 0.7%), crude protein 0.98 (SECV: 0.98%), ash 0.90 (SECV: 0.99%), in vitro organic matter digestibility 0.90 (SECV: 3.6%), acid detergent fiber 0.95 (SECV: 2.0%) and neutral detergent fiber 0.86 (SECV: 5.4%) on a dry matter basis. The results... |
| Tipo: Journal article |
Palavras-chave: Forage quality; NIR; Chemical composition; Near infrared analysis. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072006000100005 |
| |
|
|
| Cozzolino,Daniel; Delucchi,Inés; Kholi,Moham; Vázquez,Daniel. |
| The aim of this work was to explore the potential of visible (Vis) and near infrared reflectance (NIR) spectroscopy to measure quality characteristics in whole grain wheat (Triticum aestivum L.) as a tool in breeding programs. A total of 100 samples were analyzed by the reference methods for crude protein (CP), wet gluten (WG) and sodium dodecyl sulfate (SDS) sedimentation test. Whole grain samples were scanned in a NIR monochromator instrument (400-2500 nm) in reflectance. Partial least squares (PLS) were used to develop calibration equations for the quality characteristics in whole wheat. Calibration models were validated using an independent set of samples (n = 50) randomly selected from the population set. The uncertainty of the PLS models was... |
| Tipo: Journal article |
Palavras-chave: Whole wheat; NIR; Protein; Wet gluten; Grain quality; SDS. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072006000400005 |
| |
|
| |
|
|
| Cozzolino,Daniel; Fassio,Alberto; Fernández,Enrique. |
| La espectroscopía de reflectancia en el infrarrojo cercano (NIRS) fue utilizada para predecir la composición química del ensilaje de maíz (Zea mays L). Doscientas muestras de un amplio rango de características físico - químicas y origen, fueron leídas en un equipo monocromador (NIRS 6500, NIRSystems, Silver Spring, Maryland¸ USA) en el rango de longitudes de onda de 400 a 2500 nm, en reflectancia. Los coeficientes de determinación en calibración (R²cal) y el error estándar de la validación cruzada (SECV) fueron 0,94 (SECV: 0,74%), 0,94 (SECV: 0,54%), 0,91 (SECV: 1,8%), y 0,90 (SECV: 3,8%) para MS, proteína cruda (PC), fibra detergente ácida (FDA) y fibra detergente neutra (FDN) en base materia seca. Los resultados demuestran el potencial del NIRS para el... |
| Tipo: Journal article |
Palavras-chave: Espectroscopía de reflectancia en el infrarrojo cercano; NIRS; Calidad; Ensilaje de maíz; Zea mays L.. |
| Ano: 2003 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072003000400007 |
| |
|
|
|
