Results 251 to 260 of about 2,474,981 (306)
Some of the next articles are maybe not open access.
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
M S, Kurzer, D H, Calloway
openaire +2 more sources
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
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
Nitrogen Fixation and the Nitrogen Balance in Peatland Ecosystems
Ecology, 1980A survey of heterotrophic nitrogen fixation was carried out using the acetylene reduction assay on peat from mires in Canada, England, Scotland, Ireland, Norway, Germany, Italy, and Malaysia. A detailed study of the relationship between nitrogen fixation and peatland ecology was carried out on the German sites.
G. J. Waughman, D. J. Bellamy
openaire +1 more source
Nitrogen balance as an indicator of nitrogen leaching in Finland
Agriculture, Ecosystems & Environment, 2006Abstract When measured data of nitrogen (N) losses to the environment are not available, calculated N balances are often used to indicate losses. The aim of this study was to describe the relations between N surface balances and N leaching losses in two agricultural runoff fields.
Salo, Tapio, Turtola, Eila
openaire +1 more source
1987
A shift towards a negative nitrogen balance implies impairment of essential life processes. Among the substances adversely affected are: Enzymes in the Krebs cycle, resulting in impaired carbohydrate metabolism and anaerobic metabolism, with a consequent deterioration of the circulation Transport proteins in blood plasma, such as hemoglobin ...
openaire +1 more source
A shift towards a negative nitrogen balance implies impairment of essential life processes. Among the substances adversely affected are: Enzymes in the Krebs cycle, resulting in impaired carbohydrate metabolism and anaerobic metabolism, with a consequent deterioration of the circulation Transport proteins in blood plasma, such as hemoglobin ...
openaire +1 more source