Document Detail

Nutritional, physical, and sensory evaluation of hydroponic carrots (Daucus carota L.) from different nutrient delivery systems.
MedLine Citation:
PMID:  20492130     Owner:  NLM     Status:  MEDLINE    
Carrot (Daucus carota L.) has the highest carotenoid content among foods and is consumed in large quantities worldwide, while at the same time its market demand continues to increase. Carotenoids have also been associated with protective effects against cancer and other chronic diseases. The most predominant carotenoids in carrots are beta- and alpha-carotenes. Moisture, ash, fat, texture, color, carotene content, and consumer acceptance of carrots grown in a hydroponic system with nutrient film technique (NFT) and microporous tube membrane system (MTMS) were evaluated. The moisture contents of the NFT- and MTMS-grown carrots ranged from 86.8 +/- 0.13% to 92.2 +/- 2.25% and 80.9 +/- 0.31% to 91.6 +/- 1.01%, respectively. Fat and ash contents of the carrots were negligible. NFT-grown Oxheart had the most beta-carotene (9900 +/- 20 microg/100 g) while Juwaroot had the least (248 +/- 10 microg/100 g). However, the beta-carotene content of Juwaroot from the NFT batch II carrots was 3842 +/- 6 microg/100 g. MTMS-grown carrots had less variation in the total beta-carotene contents (2434 +/- 89 to 10488 +/- 8 microg/100 g) than those from NFT. Overall, Nantes Touchan (4.8 +/- 2.3) and Nevis-F (7 +/- 1.4) from NFT were the least and most preferred by consumers. Mignon was also acceptable to consumers, and significantly (P < 0.05) more preferred than the other carrots in that NFT batch. MTMS-grown Kinko and Paramex, which were significantly (P < 0.05) more preferred than Nandrin-F and the commercial field-grown carrot, were equally liked by consumers. Nevis-F, Mignon (NFT), Paramex, and Kinko (MTMS) are potentially good cultivars to be included in NASA's food system.
P N Gichuhi; D Mortley; E Bromfield; A C Bovell-Benjamin
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of food science     Volume:  74     ISSN:  1750-3841     ISO Abbreviation:  J. Food Sci.     Publication Date:    2009 Nov-Dec
Date Detail:
Created Date:  2010-05-24     Completed Date:  2010-09-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0014052     Medline TA:  J Food Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  S403-12     Citation Subset:  IM    
Dept. of Food and Nutritional Sciences, 204 Campbell Hall, Tuskegee Univ., Tuskegee, AL 36088, USA.
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MeSH Terms
Carotenoids / analysis
Daucus carota / anatomy & histology,  chemistry*
Food Preferences
Hydroponics / methods*
Mechanical Phenomena
Middle Aged
Plant Roots / anatomy & histology,  chemistry*
Shear Strength
Species Specificity
Water / analysis
Young Adult
beta Carotene / analysis*
Reg. No./Substance:
36-88-4/Carotenoids; 432-70-2/alpha-carotene; 7235-40-7/beta Carotene; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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