Absence of relation between sick leave caused by musculoskeletal disorders and exposure to magnetic fields in an aluminum plant.

This is a study of the relationship between occupational exposure to magnetic fields in pot rooms and occurrence of sick leave caused by musculoskeletal disorders. The average exposure to static magnetic fields was 8 mT in the pot rooms. Ripple fields were recorded as well.

Symptoms of the musculoskeletal system and exposure to magnetic fields in an aluminium plant.

Objective: The study was performed to examine the influence of the exposure to magnetic fields in the potrooms of an electrolysis plant on the occurrence of musculoskeletal symptoms among the employees. The study was performed after much discussion and worry in the aluminium industry about this issue.

Methods: A retrospective cohort study was performed at an aluminium plant.

Morphology, distribution, and specificity of olfactory receptor cells in salmonid fishes.

Electrophysiological and anatomical investigations of the olfactory epithelium of three salmonid species have been coordinated. Different corridors in the olfactory rosettes were examined by recording of the electro-olfactogram (EOG) using two recording electrodes simultaneously against one common indifferent electrode. Biopsies comprising the two lamellae bounding each of the examined corridors were examined by scanning electron microscopy (SEM).

Specificity and distribution of receptor cells in the olfactory mucosa of char (Salmo alpinus L.).

Olfactory receptor activity was studied in the char by two methods: (a) recording of the electro-olfactogram (EOG) with two electrodes simultaneously in the olfactory pit and (b) recordings from the olfactory bulb during olfactory stimulation and progressive removal of lamellae in the olfactory rosette. As stimuli were used methionine representing the amino acids and dilute char bile representing the bile salts. By cross-adaptation studies it was demonstrated that receptors sensitive to each of these two stimuli re functionally independent.

Olfactory sensitivity to bile acids in salmonid fishes.

Monopolar DC-recordings were made simultaneously from two positions on the olfactory bulb of chars (Salmo alpinus L.) and graylings (Thymallus thymallu L.) using bile acids and amino acids as olfactory stimulants.