food fatigue in space
FPS 64, Page 85
Development of a ‘Gourmet’ Menu Items for Long-Term Manned Space Missions in an ALSS Environment Christopher M. Gregson and Tung-Ching Lee
Department of Food Science, the Center for Advanced Food Technology and NJ-NSCORT.
Rutgers University
63 Dudley Road
New Brunswick, New Jersey 08901, U.S.A.
The quality of food in an Advanced Life Support System (ALSS) environment, especially on long-term space missions, is of major importance. In this psychologically stressful environment food-fatigue and nutrition are important considerations. As the diet must be based almost entirely on a small number of food crops and processing methods, devising desirable diets is challenging. The objective of this work was to produce ‘gourmet’ menu items using as few ingredients that cannot be produced from the ALSS crops as possible.
A novel approach was used in this work by combining the techniques available from food science and approaches taken in the culinary arts. An initial study was made of the foods producible using the limited resources. Through nutritional tables, primary physical descriptors (color, texture etc.), professional culinary experience and knowledge of traditional food combination conventions, menu items were devised. These were assessed in terms of preparation time, level of skill required, practicality within the ALSS system and gastronomic quality.
Suitable menu items can be devised using only the available resources with a small number of additions, e.g. salt. Flavoring ingredients, sweeteners and a small number of processing aids that cannot be made from the ALSS crops are essential to improve variety but must be transported from earth. The problems faced in providing a quality diet and ways in which solutions can be implemented by the astronauts are discussed by focusing in on particular examples.
Whereas most previous studies have concentrated on the nutritional and practical aspects of food preparation within an ALSS environment, this study has shown that by combining knowledge from the culinary arts and food science, the quality of food provision can be significantly improved. The approach used in this study could be used to provide high-quality foods for diets from limited ingredients (e.g. vegetarian) on earth.
FPS 69, Page 90
Acceptability of Near-Vegan ALS Foods in a 30-Day Diet Study David Levitsky, Rupert Spies, Adriana P. Rovers, Ammar Olabi, and Jean B. Hunter
Division of Nutritional Sciences, Cornell University
In order to evaluate the quality and system mass costs of plant based diets intended for bioregenerative life support systems, 225 foods based on ALS crops have been developed and tested for acceptability by panels of omnivores aged 30-55 years. Nearly all scored above 6 on a 9-point hedonic scale and the average acceptability was 6.9. The foods included breakfast items, salads, entrees, side dishes, beverages, desserts, soups and snacks.
A subset of the above foods was re-tested in a short-term closed diet study . Sixteen free-living subjects, 9 women and 7 men from the earlier taste panel, consumed only foods provided by the study for a period of 30 days. The study was divided into three 10-day segments. In each segment the same foods were presented, but in different order. Subjects ate weekday breakfasts and lunches at the study site and carried away snacks and their weekend and evening meals, returning all leftovers to the study site.
An individual’s satisfaction with a diet depends on the acceptability of the foods in the diet, the subject’s degree of adaptation to the diet, the degree of personal food choice allowed, the variety of foods in the diet, and sensory fatigue or boredom with individual foods. Our hypothesis was that subjects dissatisfied with the diet would reduce their food intake, find individual foods less acceptable, experience more
negative mood states, and feel tempted to cheat on the diet.
Subjects’ food intake was measured by weighing individual food dishes before and after meals. Energy intake was extrapolated from these measurements. Subjects rated each food for acceptability on a 9 point scale at each presentation. They were weighed 5x/week. The Profile of Mood Scores test was administered at intervals before, during and after the study. An exit interview with each subject covered dietary infractions and changes in physical activity, among other issues.
This presentation will cover preliminary results of the study, and their significance to the BIO-Plex food system. The study has not been completed as of the abstract deadline.
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