Researchers from Tuskegee University in Alabama conducted a study targeted at finding a way to incorporate natural and fresh antioxidants into the diets of astronauts while traveling in space. They grew 18 different varieties of hydroponic carrots using two different methods of nutrient delivery. Growing carrots hydroponically cultivates the vegetables by placing the roots in liquid nutrient solutions rather than in soil.
Among all foods, carrots have the highest carotenoid content. They also contain a natural pigment known for provitamin A and have been associated with protection against cancer, cardiovascular diseases, cataracts and macular degeneration as well as enhancing the immune response. Astronauts can be exposed to elevated levels of radiation, which might put them at risk for some types of cancer. Researchers believe that the addition of unprocessed carrots to their diets may help reduce the negative effects of radiation and cancer development.
The hydroponically grown carrots were issued nutrients in two different methods. One method is the nutrient film technique (NFT), in which the roots were exposed to a nutrient solution within a plastic film trough. The second method is the microporous tube membrane system (MTMS), in which nutrient tubes were embedded into Turface—a material similar to crushed clay— where the carrots were planted.
All carrots were harvested 70 days after planting. They were tested for moisture, fat and carotene content as well as color and texture. Consumer testing also occurred to test the acceptability of the hydroponic carrots. This group evaluated color, crunchiness, sweetness, fibrousness, blandness and overall preference of the 18 different carrot types grown using NFT and MTMS.
The study concluded that hydroponic carrots grown using the MTMS method were most appealing to consumers due to their color and more carrot-like appearance. Moisture contents were similar among all hydroponic carrots as was the carotene content. Lead researcher A.C. Bovell-Benjamin stated, “The Nevis-F carrot cultivar grown using the NFT method had the highest carotenoid content and acceptability among consumers, and therefore, it will be the most likely choice for inclusion in NASA’s food system.”
To receive a copy of the study, please contact Jeannie Houchins at email@example.com.
© 2009 Institute of Food Technologists
Jeannie Houchins | Newswise Science News
The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung
A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences