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| Registros recuperados: 15 | |
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| Pereira,Antonio Carlos Prestes; Judacewski,Priscila; Coelho,Gabriel; Salem,Renata Dinnies Santos; Marinho,Marina Tolentino; Alberti,Aline; Zielinski,Acácio Antonio Ferreira; Demiate,Ivo Mottin; Nogueira,Alessandro. |
| ABSTRACT: There are no specific technical regulations regarding the identity and quality of white mold surface-ripened cheeses in Brazil. These cheeses are sold both whole (Camembert-type) and in wedges (Brie-type). The aim of the study was to evaluate the physical and chemical properties; technological parameters and microbiological safety of 20 whole cheeses (Camembert-type) and 16 cheese wedges (Brie-type) produced in Brazil. Samples showed a wide range in sodium (91.0-731.0 mg/100 g, cheeses wedges) and calcium (238.0-1100.0 mg/100g, whole cheeses) contents. The cheese groups presented no significant differences in relation to the majority of the analyzed parameters. Listeria monocytogenes was reported in 5% of the whole cheese samples. The other... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cheese quality; Chemometrics; Camembert-type cheese; Brie-type cheese. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000100752 |
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| Belo,Renata França Cassimiro; Augusti,Rodinei; Lopes,Paulo Sérgio Nascimento; Junqueira,Roberto Gonçalves. |
| In order to determine the variability of pequi tree (Caryocar brasiliense Camb.) populations, volatile compounds from fruits of eighteen trees representing five populations were extracted by headspace solid-phase microextraction and analyzed by gas chromatography-mass spectrometry. Seventy-seven compounds were identified, including esters, hydrocarbons, terpenoids, ketones, lactones, and alcohols. Several compounds had not been previously reported in the pequi fruit. The amount of total volatile compounds and the individual compound contents varied between plants. The volatile profile enabled the differentiation of all of the eighteen plants, indicating that there is a characteristic profile in terms of their origin. The use of Principal Component Analysis... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chemometrics; Biodiversity; Cerrado native fruit. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000500018 |
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| Campbell,Patrícia Morais da Matta; Fernandes Filho,Elpídio Inácio; Francelino,Márcio Rocha; Demattê,José Alexandre Melo; Pereira,Marcos Gervasio; and,Clécia Cristina Barbosa Guimarães; Pinto,Luiz Alberto da Silva Rodrigues. |
| ABSTRACT Quantification of soil properties is essential for better understanding of the environment and better soil management. The conventional techniques of laboratory analysis are sometimes costly and detrimental to the environment. Thus, development of new techniques for soil analysis that do not generate residues, such as spectroscopy, is increasingly necessary as a viable way to estimate a wide range of soil properties. The objective of this study was to predict the levels of organic carbon (OC), clay, and extractable phosphorus (P), from the spectral responses of soil samples in the visible and near infrared (Vis-NIR), medium infrared (MIR), and Vis-NIR-MIR using different preprocessing methods combined with five prediction models. Soil samples were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spectral analysis; Reflectance; Chemometrics. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100314 |
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| Lima,Daniel Braga de; Agustini,Bruna Carla; Silva,Eliz Guimarães da; Gaensly,Fernanda; Cordeiro,Rodrigo Becker; Fávero,Maria Luiza Drechsel; Brand,Debora; Maraschin,Marcelo; Bonfim,Tania Maria Bordin. |
| Wine production in the northern Curitiba, Paraná, Brazil, specifically the communes of Colombo and Almirante Tamandaré, is based mainly on the utilization of Vitis labrusca grapes var. Bordô (Ives). Total sugar content, pH, and total acidity were analyzed in red wine samples from 2007 and 2008 vintages following official methods of analysis. Moreover, total phenolic, flavonoid, and tannin contents were analyzed by colorimetric methodologies and the antioxidant activity was determined using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical methodology. Phenolic compounds were identified by high performance liquid chromatography. The total phenolic content of wine samples presented concentrations varying between 1582.35 and 2896.08 mg gallic acid.L-1 since... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rural; Winery; Chemometrics; Common wine; HPLC; Viniculture. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000300038 |
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| Santos,Antonio Odair; Kaye,Oren. |
| Leaf water potential is a measure commonly used to describe crop water status and water stress dynamics. The established method for determining leaf water potential using a pressure chamber is cumbersome and subject to operator error as well as time/temperature limitations. These limitations prohibit the intensive sampling required to support proactive water management of commercial crops, including vineyards. Particular for grapevines there is need for faster, more precise and more reliable tools for determining leaf water potential in the field. Portable Near-infrared spectroscopy and multivariate data analysis were applied for the modeling and prediction of leaf water potential in grapevines. For field-grown wine grapes the most significant and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: PLS; Irrigation; Spectrometry; Chemometrics. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300001 |
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| Jacq, Kévin; Perrette, Yves; Fanget, Bernard; Sabatier, Pierre; Coquin, Didier; Martinez-lamas, Ruth; Debret, Maxime; Arnaud, Fabien. |
| In the case of environmental samples, the use of a chemometrics-based prediction model is highly challenging because of the difficulty in experimentally creating a well-ranged reference sample set. In this study, we present a methodology using short wave infrared hyperspectral imaging to create a partial least squares regression model on a cored sediment sample. It was applied to a sediment core of the well-known Lake Bourget (Western Alps, France) to develop and validate a model for downcore high resolution LOI550 measurements used as a proxy of the organic matter. In lake and marine sediment, the organic matter content is widely used, for example, to reconstruct carbon flux variations through time. Organic matter analysis through routine analysis methods... |
| Tipo: Text |
Palavras-chave: Hyperspectral imaging; Chemometrics; Near-infrared spectroscopy; High resolution analysis; Organic matter. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00478/59018/61636.pdf |
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| JASTER,Henrique; JUDACEWSKI,Priscila; RIBEIRO,Jéssica Caroline Bigaski; ZIELINSKI,Acácio Antonio Ferreira; DEMIATE,Ivo Mottin; LOS,Paulo Ricardo; ALBERTI,Aline; NOGUEIRA,Alessandro. |
| Abstract A new type of ripened soft cheese by Geotrichum candidum was manufactured with pasteurized milk from Jersey and Holstein cow breeds. The physico-chemical (moisture, pH, acidity, protein, lipids and ash) and technological parameters (proteolysis, texture profile and color) during 21 days of ripening cheese (surface, center and whole), were evaluated. The differences in the cheese produced with Holstein cow milk were related to increased proteolysis (tyrosine and acid-soluble nitrogen) and the influence of the a* and b* color parameters. The cheeses prepared with Jersey cow milk showed a high fat content and lower proteolysis, which had a significant effect on the instrumental texture profile. Using chemometrics and two-way ANOVA was possible to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ripened soft cheese; Chemometrics; Surface-ripening; Proteolysis; Texture profile. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000100050 |
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| Vázquez Hernández, Lorena. |
| El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),... |
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Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/561 |
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| Vázquez Hernández, Lorena. |
| El control de calidad de los productos agroalimentarios está basado en su caracterización bioquímica, como una de las partes esenciales. Para el caso del café, la composición química está fuertemente relacionada con las condiciones agroecológicas (suelo, clima, altura, etc.) de cada una de las regiones productoras. El café es la segunda materia prima en importancia en el mercado nacional, por lo cual, la calidad es importante para este producto. Para asegurarnos de la calidad del café tanto para los consumidores como productores existe la necesidad de establecer métodos analíticos, rápidos, objetivos y sensitivos. Para realizar la caracterización del café comercial existen métodos convencionales establecidos en la Norma Mexicana (NMX-F-013-SCFI-2000),... |
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Palavras-chave: Café; Quimiometría; NIRS; Homogeneidad; PCA; SIMCA; Coffee; Chemometrics; Homogeneity; Maestría; Producción Agroalimentaria en el Trópico. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/561 |
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| Registros recuperados: 15 | |
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