L. O. Medeiros

Erythrocytes of thoroughbred horses in the after-birth hemolytic physiological process

Abstract 1. 1. The values of the erythrogram from the umbilical cord of newborn foals with 30–40 min (1 day), 3, 7, 30 days and adult thoroughbred horses were determined. 2. 2. Polycythemia was higher for umbilical cord than for one day animals. 3. 3. A physiological hemolysis took place just after birth, reaching its peak on the third day when a destruction of about 50% of erythrocytes occurred. 4. 4. The erythrocyte of thoroughbred horses is an excellent biological model for the studies of metabolical adaptations of the hemolytic physiological post-natal process.

Histochemical (polysaccharides, proteins, nucleic acids and enzymes) and autoradiographic (incorporation of 35S labelled sodium sulfate) study of the epithelial intestinal cells of Xenodon merremiiWagler, 1824 (Ophidia)

A histochemical and autoradiographic study of the lining intestinal epithelium of the snake Xenodon merremii is reported. The absorptive cells present neutral polysaccharides, arginine, tyrosine, tryptophan, cysteine, alkaline phosphatase, acid phosphatase, ATPase, AMPase, esterase and RNA. There are histochemical differences between the goblet cells of the small and of the large intestine. Whereas in the former predominates the neutral polysaccharides and are found arginine, tyrosine, tryptophan and cysteine, in the latter predominates the sulfated polysaccharides (confirmed by the uptake of radioactive sulfur) and no amino acids were found.

Morphological Study of the Esophagus of Xenodon merremii Wagler, 1924 (Ophidia)

The histology of the esophagus of the snake Xenodon merremii was studied. It presents all layers of the digestive tract in general: the mucosa, submucosa, muscle layer and serosa. The muscosa shows a special epithelium with ciliated and goblet cells in the initial portion, gradually displaced by columnar cells in the posterior third of the organ. Other cellular types, such as basal cells, argentaffin and argyrophil cells can be found throughout the esophageal mucosa.

Colostrum ingestion and age connected with physiological variations upon the electropherogram of newborn thoroughbred horses

Abstract 1. 1. The electropherogram of thoroughbred horses of different ages has been studied. 2. 2. The total protein and beta globulin increased over a period of 48 hr, while albumin increased over 24 hr. 3. 3. The amount of alpha globulin decreased over a period of 5 hr and then rose up to 24 hr. 4. 4. Gamma globulin was absent at birth and appeared after colostrum ingestion, rising over a period of 7 days.

Glycolytic intermediates and glutathione levels of erythrocyte: Comparisons between erythrocytes of humans and thoroughbred horses

Abstract 1. 1. 2,3-DPG, ATP, ADP, AMP and GSH content of red cells of horses are compared with the levels in human red blood cells. 2. 2. Horses showed lower values for these intermediates in terms of numbers of erythrocytes. 3. 3. If the values are considered in terms of MCV and MCH, the amount of 2,3 DPG and GSH from horses are more than those from human cells whilst the adenosine phosphates remain at lower values.