Nelson Gutierrez

Dr. Nelson Gutierrez

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Research Focus & Metrics

Academic Career Length

18Years (2009-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 August 2014 in Journal of Sensory Studies
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Journal Article
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BDB. Di Donfrancesco
B. Di Donfrancesco
NGNelson Gutierrez
Nelson Gutierrez
Edgar ChambersEdgar Chambers
Edgar Chambers

1 April 2020 in Engenharia Agrícola
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Journal Article
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YBYeison-Fenando Barrios-Rodriguez
Yeison-Fenando Barrios-Rodriguez
NGNelson Gutierrez
Nelson Gutierrez
JHJoel G. Hernandez
Joel G. Hernandez
The objective of this work was to study the influence of two postharvest processing methods on the biochemical composition and sensory analysis of a Colombian specialty coffee. For this purpose, coffee beans (Coffea arabica) of the Castillo variety were collected and processed using the wet and semi-dry methods, and the drying process was conducted in a sun drier prototype with a plastic parabolic cover, with a maximum drying air temperature of 50 °C; green coffee beans were managed according to the official Specialty Coffee Association cupping protocol and roasted to a medium and dark degree. Physicochemical determinations (pH, color, titratable acidity, caffeine content, and chlorogenic acid quantification) in green coffee and roasted coffee beans were performed; the sensory analysis was performed by a panel of trained tasters. The wet and semi-dry processing methods resulted in differences in color parameters, pH values, and caffeine content. However, the titratable acidity, chlorogenic acid, and sensory evaluation did not have any difference; therefore, the type of coffee processing method used is not relevant to the final chemical properties of the roasted coffee (i.e., the Castillo variety) evaluated in this study; the coffee cup score is also not affected, and the post-fermentation washing process can be dispensed with.

1 February 2019 in Food Chemistry
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Journal Article
Closed access
SVSebastián Velásquez
Sebastián Velásquez
NPNestor Peña
Nestor Peña
JBJuan Carlos Bohórquez
Juan Carlos Bohórquez
NGNelson Gutierrez
Nelson Gutierrez
GSGavin Sacks
Gavin Sacks

15 December 2023 in World Development Perspectives
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Journal Article
Open access
JJJohanna Jacobi
Johanna Jacobi
DLDerly Lara
Derly Lara
SOSebastian Opitz
Sebastian Opitz
SCSabine de Castelberg
Sabine de Castelberg
SUSergio Urioste
Sergio Urioste
CYChahan Yeretzian
Chahan Yeretzian


21 September 2016 in Foods
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Journal Article
Open access
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KKKadri Koppel
Kadri Koppel
FHFederica Higa
Federica Higa
SGSandria Godwin
Sandria Godwin
NGNelson Gutierrez
Nelson Gutierrez
RSRoman Shalimov
Roman Shalimov
Edgar ChambersEdgar Chambers
Edgar Chambers
Foodborne illnesses may be related to many food production factors with home practices of consumers playing an important role in food safety. Consumer behavior for handling food leftovers has been studied, however little work on comparisons among countries has been published. The objective of this study was to investigate home food leftover practices of people from North American, South American, and European countries. Surveys were conducted with approximately 100 or more consumers in Argentina, Colombia, the United States, Estonia, Italy, Russia, and Spain. The participants responded to questions related to the length of time different types of food leftovers; such as meat, fresh salads, or restaurant dishes would be kept refrigerated or would be left at room temperature before refrigeration. Researchers also investigated how consumers would determine if the food was still safe for consumption. Potentially risky behaviors were observed in all seven countries. For instance, 55.8% of Estonians, 25% of Russians and 25.8% of Argentinean participants left food out at room temperature for several hours before storing in the refrigerator. Furthermore, 25%–29% of Colombian, Estonian, and Spanish consumers would look, smell, and taste leftovers to determine its probable safety. Correct handling of leftovers is an important aspect of consumer food safety. Although the surveys cannot be representative of all consumers in each country, they do provide an initial overview of comparative practices for handling leftovers among different countries. This provides government and educators with information on potential universal and unique consumer food safety issues related to handling leftover foods among various countries.