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Nitrate and nitrogen balances in men
The American Journal of Clinical Nutrition, 1981Nitrate is a nitrogen-containing compound that is not detected by the traditional Kjeldahl method of nitrogen analysis. Nitrate balance studies were done in order to determine if nitrate production in the human body contributes to the irrationally positive nitrogen balances that have been reported in healthy adults. Seven healthy young men, confined to
Mindy S. Kurzer, Doris Howes Calloway
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Nitrogen Fertilization I: The Nitrogen Balance
2016Nitrogen is the most important nutrient in agricultural production. The natural input of N is due to N fixation, especially by Rhizobium bacteria that infect the roots of legumes. Organic N becomes inorganic through mineralization, and then inorganic N is absorbed by plants.
Miguel Quemada +3 more
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Aquaculture, 1979
Abstract The digestibility of three experimental diets of casein—gelatin basis with varying levels of carbohydrate and protein content was studied after feeding to rainbow trout. An attempt was made to estimate true protein digestibility by an indirect method, which is based on the relationship between nitrogen intake and fecal nitrogen excretion ...
J. Rychly, L. Spannhof
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Abstract The digestibility of three experimental diets of casein—gelatin basis with varying levels of carbohydrate and protein content was studied after feeding to rainbow trout. An attempt was made to estimate true protein digestibility by an indirect method, which is based on the relationship between nitrogen intake and fecal nitrogen excretion ...
J. Rychly, L. Spannhof
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Nitrogen balance and Arctic throughflow
Nature, 2006Waters moving east through the Arctic Ocean significantly contribute to nitrogen fixation in the Atlantic.
Michiyo Yamamoto-Kawai +2 more
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Feasibility of national nitrogen balances
Environmental Pollution, 1998For some years, the EU has developed policy aiming to reduce environmental pollution due to nitrogen. Today there are no really satisfying means to assess the impacts of this policy. A “farm gate like” kind of balance applied at a national level could be used as an indicator. Farm gate balances are calculated using inputs and outputs of farms.
Loïc Commagnac +2 more
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Nature Geoscience, 2010
The ocean's nitrogen budget has escaped quantification. A modelling study shows how a small shift in the nitrate-to-phosphate uptake ratio of phytoplankton has a large effect on calculated nitrogen fixation rates.
Wolfgang Koeve, Paul Kähler
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The ocean's nitrogen budget has escaped quantification. A modelling study shows how a small shift in the nitrate-to-phosphate uptake ratio of phytoplankton has a large effect on calculated nitrogen fixation rates.
Wolfgang Koeve, Paul Kähler
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Nitrogen Balance Studies in Human Pregnancy
Obstetrical & Gynecological Survey, 1981Sixty-eight primigravidae successfully complete a 12-day nitrogen balance study when they were between 30 and 34 weeks pregnant. Particular attention was paid to ensure that each patient ate a hospital diet quantitatively equal to the home diet; each patient ate the same every day and all food was eaten.
Doris M. Campbell +2 more
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