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Biomedical subjects

K Lagerspetz

Publications and source records attributed to K Lagerspetz.

14 recordsLinked to original sources

Aggression and sociometric status among peers: do gender and type of aggression matter?

The connections between the use of different types of aggression (direct physical, direct verbal, and indirect) and sociometric status among same-sex and opposite-sex peers were studied. The subjects were 209 ninth-grade adolescents. Although an adolescent's aggression in general was related to being rejected by peers, a different picture emerged when the shared variance between types of aggression was controlled: The partial correlations showed that when the level of direct (physical and verbal) aggression was kept constant, increases in indirect aggression did not explain variance in peer rejection scores. On the contrary, the use of indirect aggression contributed (especially among boys) to social acceptance by peers. The direct (physical and verbal) forms of aggression were unrelated to adolescents' social acceptance scores. No clear differences were detected between girls' and boys' acceptance or rejection of their aggressive peers, despite the finding that boys seemed to tolerate indirect aggression better than girls did.

Adolescent↗

Phagocyte activity in the frog Rana temporaria: whole blood chemiluminescence method and the effects of temperature and thermal acclimation.

The respiratory burst activity of phagocytes was measured as zymosan induced, luminol-enhanced chemiluminescence (CL) emission in the whole blood of the frog Rana temporaria. The effect of thermal acclimation on phagocyte activity was studied by acclimating adult frogs for 14-18 days to 5 and 24 degrees C. The phagocyte CL was measured at seven temperatures ranging from 5 to 37 degrees C. Clear signs of resistance acclimation were seen both in CL reaction kinetics at 5 degrees C (P < 0.0001) and in intensities at 37 degrees C (P < 0.003). Thermal adaptation was also seen as a 1-5 degrees C shift in the temperature response curve of CL intensity towards the acclimation temperature (P < 0.03). The highest CL intensities were seen at 30 degrees C and they were of the same magnitude in both acclimation groups. The phagocyte activation enhanced progressively at temperatures ranging from 5 to 30 degrees C, showing that migration to a warmer environment would increase the phagocyte activity of frogs. The possible relation to behavioral fever is discussed.

Animals↗