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Food, energy, and water
2015
"If you were to ask a layman which is the most important resource among food, energy and water, the answer is likely to be "food." As a matter of fact, humans can survive longer without food and energy than without water. However, humans depend on the sun as the primary source of energy that assures our survival on this planet. Furthermore, the civilized world is highly dependent on energy for comfortable living and mobility. This suggests that energy is a very important requirement. The fact is we need all of them and their interrelationship is discussed below (1)"--
Afficher plus [+] Moins [-]Water-food-energy nexus Texte intégral
2014
Bird, Jeremy | Dodds, F. | McCornick, Peter | Shah, Tushaar
Food and water security
2008
Aswathanarayana, U.
Growing food in water Texte intégral
2000
Technical Centre for Agricultural and Rural Cooperation
Growing food in little space is a challenge being faced daily by families in crowded areas. Hydroponics, the art of growing plants with no soil in water with added nutrients, is one solution but it has faced opposition from urban planners and scientists who stress that its complexity is beyond the normal woman or man. As the article on urban agriculture in Spore 81 urged, 'The scientist, whether based in a laboratory or a local community group, who develops a popular and transferable method of hydroponics will be remembered far into the next millennium for a significant contribution to food security.' Is Home Hydroponic Gardens the answer to the prayer? It could well be, with its rugged hard-cover full of careful and detailed texts and superb step-by-step coloured illustrations explaining how to use simplified hydroponics, requiring no mechanical devices. It gives methods and construction techniques for building hydroponic gardens on waste lots in towns, in backyards, on rooftops, with details of experiences in Zimbabwe, Senegal and Colombia. There are precise and proven recipes for the production of home-made organic nutrient mixes, as well as explanations of how plants take their nutrients and grow. This is real popular science at work, with dietary advice and recipes following the section on the daily chores of plant care and harvesting the dozens of suggested fruits, herbs, spices and salad, root and table vegetables. With a little bit of effort, a family with a hydroponic garden will not only end up healthier and wealthier, but also much better informed about how plants grow, and thus able to encourage the neighbours to take the hydroponic route too. Home Hydroponic Gardens. P Bradley & C Marulanda. Global Hydroponic Network. 2000. 240 pp.US$ 34.95 E 40.95 Contact GHN for price of mail, or details of distributors in Zimbabwe, Europe, Asia and Latin America GHN PO Box 151 Corvallis, Oregon 97339, USA Email: info@hydrogarden.com | Home Hydroponic Gardens. P Bradley & C Marulanda. Global Hydroponic Network. 2000. 240 pp.US$ 34.95 E 40.95 Contact GHN for price of mail, or details of distributors in Zimbabwe, Europe, Asia and Latin America GHN PO Box 151 Corvallis, Oregon 9
Afficher plus [+] Moins [-]Water and food quality
1989
Hardman, T.M. (ed.)
Water activity in food
1979
Anagnostopoulos, G.
One of the oldest methods of food preservation is the reduction of water content in foods. Sun and fire drying, salting of animal flesh, and sugaring of fruit in prehistoric times simulated natural drying processes such as fruit drying on trees. Foods with a high water content, such as milk, meat, fruits, and vegetables, undergo rapid microbial deterioration. The concept of water activity (a-w) gives information about the availability to microbial growth and the stability of food. It is expressed in terms of vapor pressure generated by an aqueous system relative to that of pure water at the same temperature. Growth and survival of food spoilage organisms (bacteria, yeasts and molds) are a function of water activity and other environmental factors including temperature, pH, oxygen, and carbon dioxide concentration, and the presence of preservatives.
Afficher plus [+] Moins [-]Water activity and food
1978
Troller, John A. | Christian, J. H. B.
Land, water, and food
1961
Addison, Herbert
