Biomedical subjects

J J Villasmil

Publications and source records attributed to J J Villasmil.

3 recordsLinked to original sources

PubMed1989

[Blood levels of zinc in normal subjects].

Zinc serum concentrations were studied by flameless atomic absorption spectrophotometry in normal subjects at the Blood Bank of Maracaibo, Venezuela. We analyzed 487 serum samples: 444 from males and 43 from females. The concentration detected was 84 +/- 20 (mean +/- S.D.) microgram Zn/100 ml. The statistical analysis of data did not show any significant differences between age and sex in the groups studied. No-functional relationship was determined between zinc serum concentrations and age and sex of subjects.

Adolescent↗

PubMed1984

Copper distribution in the normal human brain.

Copper concentration was determined in samples from 38 areas of 7 normal human brains. The grey matter contained higher concentrations of copper than the white matter. Identical areas of the grey and white matter of the cerebral cortex showed significant differences between individuals. In the caudate nucleus the highest concentrations of copper were found in the tail followed by the body and the head, respectively. A negative linear regression between age and brain copper levels was demonstrated.

Adolescent↗

PubMed1982

The regional distribution of manganese in the normal human brain.

The concentration of manganese per gram dry tissue weight was determined in samples from 39 areas of 8 normal human brains. Manganese was shown to be unevenly distributed with the largest concentrations in the pineal gland and the olfactory bulb. The gray matter yielded a higher content of manganese than the white matter. Significant differences between individuals were found for identical areas of the gray and white matter of the cerebral cortex. Higher levels of manganese were demonstrated in the tail of the caudate nucleus than in the body and the head of the same structure. No significant correlation was shown between the amount of manganese in brain and age.

Adolescent↗