|
|
|
|
|
| Prache,Sophie. |
| There is currently an increased consumer demand for information on herbivore production factors, particularly animal diet. To meet these demands, producers and commercial entities develop specifications via quality certifications. There is therefore a need for analytical tools that may guarantee that the specification commitments have been fully met or to help with constructing them. The present paper reviews the current state of knowledge concerning diet authentication in sheep meat and milk, the different approaches that have been investigated, some leading examples concerning the discrimination of contrasting feeding situations, together with the persistence of some diet markers in the event of changes in animals' diet. The nature of the diet strongly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Authentication; Diet tracers; Meat; NIR spectroscopy; Pasture-feeding; Reflectance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001300036 |
| |
|
|
| Santos,Antonio Odair; Wample,Robert L.; Sachidhanantham,Sivakumar; Kaye,Oren. |
| An experiment was carried out from 2005 to 2008, to calibrated NIR-based instrumentation and explore within field grape quality variability and map potential grape quality descriptors along vineyards, as a subsidy for differential harvesting,. The quality indicators (anthocyanin content, pH, titratable acidity and soluble solids) were subject to geo-spatial modeling. Subsequently, the data set was utilized to delineate "within-field" grape quality zone and to determine the timing of the harvest. Differential machine harvesting was implemented and segregation of wine grapes was done "on-the-go". The approach for field prediction of grape quality parameters and zone delineation allowed for separated fermentation for at least two wine styles. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NIR spectroscopy; Grape; Wine. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200003 |
| |
|
| |
|
|
| BOMFIM, M. A. D.; MEDEIROS, A. N.; BATISTA, A. M. V.; SILVA, J. K.; MACIEL, M. do V.; CAVALCANTE, A. C. R.; GALVANI, D. B.; SANTOS, S. F. dos; ANGERER, J.. |
| Abstract: The nutrition of grazing ruminants on Brazilian Northeastern rangelands (Caatinga) is challenging. The Fecal NIR spectrum shows high linearity with dietary nutrients of grazing ruminants. However, it requires a database variability wide enough to encompass all field condition. Many species from Caatinga have been identified as endemical, may acting as a link points, raising the possibility to build a global model. This work is a first approximation to evaluate the feasibility to develop a global model of fecal NIRS to small ruminants on Brazilian Caatinga. In conclusion, fecal NIR global model from Brazilian rangelands seems be potentially feasible, depending on how wide is the botanical composition of the area and when the samples are obtained,... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Infrared spectrophotometry; NIR spectroscopy; Caatinga; Small ruminants; Goats; Sheep; Ruminant nutrition; Animal nutrition; Rangelands; Animal models; Brazil; Semiarid soils. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1107114 |
| |
|
|
| COSTA, M. C. A.; MATALLO, M. B.; FERREIRA, M. M. C.; QUEIROZ, S. C. do N. de; ALMEIDA, S. D. B.; FRANCO, D. A. S.. |
| Abstract: Shikimic acid is a natural organic compound produced in the biochemical pathways of eukaryotic organisms and is generally utilized as a starting material of the antiviral drug Oseltamivir (Tamiflu®). This study shows the results of shikimic acid accumulation in Brachiaria plantaginea, an abundant, grassy plant found in Brazil and other countries in Africa and America, after glyphosate spraying at three different doses. B. plantaginea plants harvested after 6 days of exposure to the herbicide showed that shikimic acid accumulation increased by 345%, on average, compared to unsprayed plants. The combination of near infrared spectroscopy and multivariate analysis using partial least square regression was applied for the quantification of shikimic... |
| Tipo: Separatas |
Palavras-chave: NIR spectroscopy; PLS regression; Brachiaria plantaginea; Gramínea; Shikimic acid; Chemometrics. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1066054 |
| |
|
|
| COSTA, M. C. A.; MATALLO, M. B.; FERREIRA, M. M. C.; QUEIROZ, S. C. do N. de; ALMEIDA, S. D. B.; FRANCO, D. A. S.. |
| Shikimic acid is a natural compound, precursor of the antiviral Oseltamivir used against influenza A. It is a scarce and expensive chemical, obtained mainly from seeds of shrubs natives in China and Japan. In this study we propose a fast and clean procedure for the quantification of shikimic acid in B. plantaginea, an alternative source of shikimic acid, using NIR spectroscopy combined with PLS regression. |
| Tipo: Separatas |
Palavras-chave: NIR spectroscopy; Chemometric analysis; PLS regression.; Brachiaria Plantaginea.; Shikimic acid.. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1071444 |
| |
|
|
| BUENO,RAFAEL D.; BORGES,LEANDRO L.; GOD,PEDRO I.V. GOOD; PIOVESAN,NEWTON D.; TEIXEIRA,ARLINDO I.; CRUZ,COSME DAMIÃO; BARROS,EVERALDO G. DE. |
| ABSTRACT Soybeans contain about 30% carbohydrate, mainly consisting of non-starch polysaccharides (NSP) and oligosaccharides. NSP are not hydrolyzed in the gastrointestinal tract of monogastric animals. These NSP negatively affect the development of these animals, especially the soluble fraction. This work aimed to establish a method to quantify NSP in soybeans, using high performance liquid chromatography (HPLC), and to estimate correlations between NSP, oligosaccharides, protein and oil. Sucrose, raffinose + stachyose, soluble and insoluble NSP contents were determined by HPLC. Oil and protein contents were determined by near-infrared spectroscopy (NIRS). The soluble PNAs content showed no significant correlation with protein, oil, sucrose and raffinose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soybean; Carbohydrates; Anti-nutritional factors; Quantitative analysis; HPLC; NIR spectroscopy. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100205 |
| |
|
|
| bagherpour, hossein. |
| Near-Infrared (NIR) spectroscopy gives information about the chemical properties of objects, and it is of particular interest for agricultural and food science applications given its rapid and non-destructive nature. This paper presents a study on the prediction of protein content in whole wheat kernels by NIR, comparing two statistical discriminant analysis techniques, namely PLS-DA and LDA, to classify wheat varieties and protein levels at the farm’s site. Data were collected from 3 varieties collected from 9 farms located in the same region, with a total of 54 samples analyzed. The NIR spectrometer used had a range of 950-1650 nm and it was used to classify different wheat samples according to their varieties and protein level. The optimal spectral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: NIR spectroscopy; Wheat protein; Wheat variety identification; Protein variability. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7205 |
| |
|
|
|
