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Circadian changes in ATP-ase Mg activity and in Mg and Ca content of rat liver in relation to age and season

100%

Wielgus-Serafinska E., Pawlicki K., Kaminski M., Nowaczyk-Dura G., Plewka A., Czekaj P.

Polish Journal of Environmental Studies

1996

tom 05

nr 4

This experiment was carried out on male Wistar rats aged 6, 12, and 24 months in two seasons, autumn and winter. In all age groups, the activity of Mg-dependent ATP-ase (Mg2+ -ATPase) showed rhythmic oscillations with a 12-hour period. A similar time course was observed for 12-hour variations in Mg and Ca concentrations. In both seasons the maxima of ATP-ase Mg activity paralleled the maxima of Mg and Ca concentrations. When two maxima were observed, one of them always occurred in the light phase and the other in the dark phase of the 24-hour LDcycle.

Circadian and seasonal changes in honeybee (Apis mellifera) worker susceptibility to diazinon, teflubenzuron, pirimicarb, and indoxacarb

80%

Piechowicz B., Grodzicki P., Stawarczyk M., Stawarczyk K.

Polish Journal of Environmental Studies

2013

tom 22

nr 5

Circadian and seasonal changes in the susceptibility of honeybee (Apis mellifera) workers to intoxication by organophosphate, benzoylphenyl urea, carbamate, and oxadiazine insecticides have been studied from 2008 to 2009. Animals were collected in two apiaries located in the surroundings of Mielec and Tarnobrzeg in the Sub-Carpathian Province. The experiments consisted of intoxication by select xenobiotics of the subsequent groups of animals in two-hour intervals for a period of 24 hours and the analysis of their survivability. Experiments were carried out in spring and summer. The results suggest that the susceptibility of bees to different groups of insecticides varies significantly, both in the circadian and seasonal rhythms.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

1 Czekaj P.

1 Grodzicki P.

1 Kaminski M.

1 Nowaczyk-Dura G.

1 Pawlicki K.

1 Piechowicz B.

1 Plewka A.

1 Stawarczyk K.

1 Stawarczyk M.

1 Wielgus-Serafinska E.

1 2013

1 1996

Wyniki wyszukiwania

Circadian changes in ATP-ase Mg activity and in Mg and Ca content of rat liver in relation to age and season

Circadian and seasonal changes in honeybee (Apis mellifera) worker susceptibility to diazinon, teflubenzuron, pirimicarb, and indoxacarb