BACKGROUND Stunting is common among pediatric patients on peritoneal dialysis. AIM To establish the best profile for urea kinetic variables associated to growth in children on chronic peritoneal dialysis (PD). PATIENTS AND METHODS Twenty patients, aged 1 month to 14 years, 13 males, were followed for 6-12 months, with monthly measurements of weight/age and height/age Z score; plasma creatin...

I. An experiment was undertaken to determine whether high rates of sweating in a tropical climate affect protein requirements by increasing the total nitrogen losses from the body. 2. Six fully acclimatized volunteers were given a diet supplying 5 0 g protein (= 8 g N) daily. They performed strenuous physical work of a normal nature for an average of 64 h a day for two 5-day periods. During con...

Nitrogen balances were measured in isolated perfused rat livers in the presence and absence of nitrogen donors. In all instances the balance apparently was incomplete. The expression [alanine][alpha-oxoglutarate]/[pyruvate][glutamate] remained fairly constant under the metabolic conditions studied, indicating that it may be at near-equilibrium. The source of the extra nitrogen seems to be deriv...

Increases in growth at elevated [CO2] may be constrained by a plant's ability to assimilate the nutrients needed for new tissue in sufficient quantity to match the increase in carbon fixation and/or the ability to transport those nutrients and carbon in sufficient quantity to growing organs and tissues. Analysis of metabolites provides an indication of shifts in carbon and nitrogen partitioning...

In order to achieve satisfactory biological treatment of wastewater, the wastewater should contain sufficient carbon, nitrogen, phosphorus, and trace minerals to meet the metabolic requirements for cell growth. For most food processing wastes, nutritional balance is not a problem since there usually is enough carbon, nitrogen, phosphorus, and trace minerals. However, certain food processing was...

Despite decades of measurements, the nitrogen balance of temperate forest catchments remains poorly understood. Atmospheric nitrogen deposition often greatly exceeds streamwater nitrogen losses; the fate of the remaining nitrogen is highly uncertain. Gaseous losses of nitrogen to denitrification are especially poorly documented and are often ignored. Here, we provide isotopic evidence (δ(15)NNO...

This paper examines the environmental-economic cycle for nitrogen in Denmark based on nitrogen input and output from different economic sectors. An input-output model is employed together with a nitrogen mass balance to apportion total nitrogen loading by final demand and estimate export and import of nitrogen from foreign trade. The changes in agricultural and industrial nitrogen loading from ...

In many organisms there is a balance between carbon and nitrogen metabolism. These observations extend to the nitrogen-fixing, nonsulfur purple bacteria, which have the classic family of P(II) regulators that coordinate signals of carbon and nitrogen status to regulate nitrogen metabolism. Curiously, these organisms also possess a reverse mechanism to regulate carbon metabolism based on cellula...

A total of 384 pigs was used to evaluate the effects of benzoic acid supplementation on nitrogen balance of pigs compared to antibiotics and organic acids. Pigs were weaned at 21 d of age and fed 7 diets for 5 wk based on 3 phase feeding program following nutrient requirements from NRC. There were 8 replicates per treatment and 8 pigs per pen. Treatments were NC: negative control without any su...