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  • Institut de Cultura de Barcelona
  • Ciudades y Gobiernos Locales Unidos
Podeu consultar la versió en ucraïnès a: http://hdl.handle.net/11703/111577Podeu consultar la versió en català a: http://hdl.handle.net/11703/90414, Podeu consultar la versió en castellà a: http://hdl.handle.net/11703/111352, Podeu consultar la versió en francès a: http://hdl.handle.net/11703/111513, Podeu consultar la versió en anglès a: http://hdl.handle.net/11703/111517, Podeu consultar la versió en àrab a: http://hdl.handle.net/11703/111519, Podeu consultar la versió en búlgar a: http://hdl.handle.net/11703/111521, Podeu consultar la versió en alemany a: http://hdl.handle.net/11703/111566, Podeu consultar la versió en gallec a: http://hdl.handle.net/11703/111567, Podeu consultar la versió en italià a: http://hdl.handle.net/11703/111568, Podeu consultar la versió en japonès a: http://hdl.handle.net/11703/111569, Podeu consultar la versió en persa a: http://hdl.handle.net/11703/111570, Podeu consultar la versió en portuguès a: http://hdl.handle.net/11703/111571, Podeu consultar la versió en serbi a: http://hdl.handle.net/11703/111572, Podeu consultar la versió en suec a: http://hdl.handle.net/11703/111574

Nir-Spektroskopie zur qualitativen und quantitativen prozessverfolgung bei alkoholischen gärungen

  • Sanchis Grob, Cristina
Consulta en la Biblioteca ETSI Industriales (7802), [EN] As a research tool NIR spectroscopy can be used to evaluate raw materials, yeasts, enzymes, nutritional supplements, and production parameters to optimize conditions for a production plant. As a quality assurance tool it can assist production by monitoring and maintaining control of processes. What makes NIR technology so attractive to the ethanol industry as a quality assurance and research tool is that it can measure organic substances very quickly (5-10 seconds) and consistently without the destruction of a sample. In this work, normal alcoholic fermentations and alcoholic fermentations with a lactic acid infection are carried out and measured with the NIR spectrometer. Spectra data are processed by the use of sophisticated multivariate analysis. PCA plots are made for watching the evolution of the fermentations. It was found that the 98% of the information is in the first principal component and the other one 1% is in the second principal component. It was found too that the lactid acid infection makes an impact on the PC1 data. To build a quantitative calibration model using NIR data, one must have a reference analysis method (HPLC, High Performance Liquid Chromatography) to determine the concentrations of the components of interest in the sample, i.e. ethanol, glucose and lactic acid. With these concentrations and the measurements of the NIR spectrometer one can then develop and validate the quantitative calibration models. These calibration models are used for predicting the concentrations of ethanol, glucose and lactic acid along the fermentation time. At the end of the validation the NIR predicted values are compared with those from the reference method and expressed in a plot of NIR predicted vs. reference values. In this plot there are two important indicators for how good the model is. One is the R2 (squared Pearson Correlation Coefficient) and the other one is the SEP (Standard Error of Prediction). It was found that the errors of prediction for the concentration range of the component are fairly high. The NIR technology is a new chance for measuring in alcoholic fermentations. Therefore, this work should be continued in order to improve the results.


  • Arntz, Reiner
[EN] The methods for comparing terminologies, technical texts and languages for special purposes are of interest from a theoretical, practical and pedagogical point of view. Particularly in the field of jurisprudence, considerable structural differences exist, both on the terminological level as well as on the text level. For the comparison of terminologies, the onomasiological method has proven to be particularly suitable. For comparing texts, various analytic methods have been developed, which can be combined very flexibly. With this as a basis, the description and the comparison of languages for special purposes form the link between the terminologies, the technical texts and technical communication., [ES] El método de comparar terminologías, lenguajes y tex tos especializados resulta de interés teórico, práctico y didáctico. Particularmente en el ámbito del Derecho es evidente la existencia de grandes diferencias estructurales, tanto a nivel terminológico como a nivel de tex to. P ara la comparación de terminologías, el método onomasiológico ha resultado ser muy eficaz. P ara la comparación de textos se han des arrollad o diferentes métodos de análisis que pueden combinarse de forma flexible. Sobre estas bases se apoyan la descripción y comparación de lenguajes especializados, estableciendo asimismo las relaciones entre las terminologías, los tex tos especializados y la comunicación profesional.

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