Progress 10/01/10 to 09/30/15
Outputs
Target Audience:Napa Wine Technical Group meeting, Department seminars and one-day Industry seminars Changes/Problems:The protoype spectrophotometer that was under construction was not ready for evaluation during this project period. What opportunities for training and professional development has the project provided?Graduate student (MS in Electrical and Computer Engineering). How have the results been disseminated to communities of interest?Yes, industry groups, scientific meetings and a publication. What do you plan to do during the next reporting period to accomplish the goals?
Nothing Reported
Impacts
What was accomplished under these goals?
A compact, flow-through spectrophotometer for the estimation of color and total phenol concentrations during red wine fermentations was developed. A prototype which can be mounted on a single fermentor and send measurement data by wireless transfer is in construction.
Publications
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Progress 10/01/13 to 09/30/14
Outputs
Target Audience: Wine companies and wine researchers, locally and globally Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? Research guidance, thesis and paper preparation, presentations to industry groups and national meetings. How have the results been disseminated to communities of interest? Thesis is available electronically, paper published in the leading international journal, presentation at national meeting of wine industry. What do you plan to do during the next reporting period to accomplish the goals? Assist in the development of a prototype cell that can be tested in the 2015 harvest and possibly commercialized.
Impacts
What was accomplished under these goals?
Development and testing of the flow-through cell sensor for color and phenolics for red wine fermentations.
Publications
- Type:
Theses/Dissertations
Status:
Accepted
Year Published:
2014
Citation:
Nicholas Shrake, MS Thesis, Inline Multispectral Colorimeter for Real-time Color and Total Phenolic Analysis During Red Wine Fermentations. Electrical and Computer Engineering.
- Type:
Journal Articles
Status:
Published
Year Published:
2014
Citation:
In-Line Measurement of Color and Total Phenolics during Red Wine Fermentations using an LED Sensor
Am. J. Enol. Vitic. 65:463-470 (2014)
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Progress 01/01/13 to 09/30/13
Outputs
Target Audience: US and global winemakers and wine companies. Changes/Problems:
Nothing Reported
What opportunities for training and professional development has the project provided? MS Graduate student How have the results been disseminated to communities of interest? Yes, National Conference (June 2013) and International Conference (July 2013) What do you plan to do during the next reporting period to accomplish the goals? Investigate the application of the flow cell to other wavelengths for other wine components
Impacts
What was accomplished under these goals?
Development of a prototype flow cell for measurement of red wine color and phenolics by a diode array.
Publications
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Progress 01/01/12 to 12/31/12
Outputs
OUTPUTS: Abstracts submitted to two national scientific meetings (15th Australian Wine Industry Technical Conference, Sydney, July 2013 and American Society for Enology and Viticulture 64th Annual Meeting, Monterey, June 2013). Project reports to other funding groups. PARTICIPANTS: Nicholas Shrake, graduate student in Electrical Engineering, Andre Knoesen, Professor of Electrical Engineering, Roger Boulton, Professor of Enology and Chemical Engineering. Additional support from T. J. Rodgers Fellowship at UC Davis and various donors (Roger Boulton) TARGET AUDIENCES: Target audiences are US and global wine industries, wine producing companies in particular. Automated, real-time measure of color and phenol extraction patterns during red wine fermentations. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts
A sampling system for wine to be passed through the 100um and 200 um flow cells was fabricated. An in-line filter, the flow through cell and diode array unit was tested in several red wine fermentations. Measurements at 280 and 520 nm were captured automatically. These results are being presented at two scientific meetings this year.
Publications
- No publications reported this period
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Progress 01/01/11 to 12/31/11
Outputs
OUTPUTS: Presentations of the protein spectral method and the improved red wine composition approach have been presented at the wine industry meetings. One annual report to a contributing sponsor for the diode array system of work in progress. PARTICIPANTS: A small flow-through cell suitable for UV and visible wavelength measurements using diodes has been constructed and is undergoing tesing. This is the thesis work of Nicholas Shrake and the project is jointly supervised by Professor Andre Knoesen. Nicholas is supported in part by a T. J. Rodgers fellowship in the Department of Computer Engineering. TARGET AUDIENCES: Two publications in international journals, presentations at international and wine industry meetings in the US. Support of efforts of an industry consortium to extend the UV visible spectral model and support to the group providing the commercial analytical service based on it. PROJECT MODIFICATIONS: Not relevant to this project.
Impacts
The multivariate UV-visible spectral model that was developed for the estimation of anthocyanins, polymeric pigments, tannin and non-tannin fractions, has now been adopted in several commercial wineries in the US and a commercial analytical service has been started using this model and approach for small winery customers, globally. A small simple diode array system using 3 diodes has been built for a flow-through cell aimed at measuring the color extraction of red wine fermentations. An extension of this to address similar measurements of the total phenolic fractions is in progress.
Publications
- 1. Versari, A., Laghi, L., Thorngate, J. H. and R. B. Boulton. Prediction of colloidal stability in white wines using infrared spectroscopy. J. Food Engng. 104:239-245, 2011. 2. Laghi, L., Versari, A., Nakaji, D. and R. B. Boulton. FT-IR spectroscopy and direct orthogonal signal correction preprocessing applied to selected phenolic compounds in red wines. Food Anal. Methods. Doi 10.1007/s12161-011-9240-2, 2011.
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