title: [Experimental study of fecal excretion of nitrogen in different nutritional conditions].
abstract: Fecal nitrogen excretion in different nutritional conditions were studied in 32 adult Wistar rats, casually distributed in four groups: group A (12), with normal control rats; group B (6), with subcutaneous impalnt of Walker-256 carcinosarcoma, at the beginning of the experiment; group C (8), with tumor implant eight days before the experiment beginning; group D (6), with standard skin wound in 15th day. The animals were fed with normoproteic diet (25% casein content). Nitrogen ingestion and urinary and fecal excretion were daily measured. Evaluation selected parameters were: nitrogen ingestion and urinary, fecal and total excretion; nitrogen fecal excretion/ingestion, nitrogen fecal excretion/urinary excretion and nitrogen fecal excretion/total excretion ratios; nitrogen urinary excretion/ingestion and nitrogen urinary excretion/total excretion ratios. Adequate statistical analysis was done with p < 0.05 critical limit value. It was observed that in normal animals nitrogen fecal excretion was equal to 5.7% ingestion value, 12.0% urinary excretion and 10.8% total excretion. In presence of malignant tumor, nitrogen fecal excretion was equal to 79% of normal animals value. In rats with skin wound in cicatrization nitrogen fecal excretion was 70.5% of normal animals value.
authors.affiliation: Faculdade de Medicina, Universidade de S. Paulo, SP.
authors.forename: E L
authors.initials: EL
authors.lastname: Gonçalves
authors.forename: D L
authors.initials: DL
authors.lastname: Waitzberg
authors.forename: L R
authors.initials: LR
authors.lastname: Bevilacqua
authors.forename: V M
authors.initials: VM
authors.lastname: Burger
mesh_terms: D000818:Animals; D002279:Carcinoma 256, Walker / Q000378:metabolism; D005243:Feces / Q000737:chemistry*; D008297:Male; D009584:Nitrogen / Q000378:metabolism*; D009752:Nutritional Status; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D012189:Retrospective Studies; D013997:Time Factors
chemical_list: D009584:Nitrogen
vernacular_title: Estudo experimental da excreção fecal de nitrogênio em diferentes condições nutricionais.