Serum selenium level in patients with colorectal cancer.

Serum selenium levels were determined by fluorometric procedure in 37 patients of both sexes suffering from colorectal cancer. The diagnosis was verified with histopathological examination during surgical treatment. The values found were 46.

Serum selenium levels in untreated children with acute lymphoblastic leukemia. I.

Serum selenium in the control group of 79 children aging 1 to 16 years was measured. A slight increase in serum selenium values with age occurred. The 89 patients of the test group were suffering from malignant proliferative diseases.

Urine nickel concentrations in nickel-exposed workers.

Electrothermal atomic absorption spectrometry was employed for analyses of nickel concentrations in urine samples from nickel-exposed workers in 10 occupational groups and from non-exposed workers in two control groups. Mean concentrations of nickel in urine were greatest in workers who were exposed to inhalation of aerosols of soluble nickel salts (e.g.