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Cheyletus malaccensis was fed during its life span on each of eggs, larvae, nymphs and adults of Tyrophagus putrescentiae. Both of prey eggs and larvae induced shorter periods of the predator immature stages than prey nymphs or adults. The predator food requirements seemed so be negatively correlated with the prey size, as its number successively decreased as the prey grew up. During the period of immature stages, the predator preferred prey larvae, followed by eggs, nymphs and adults. Eggs and larvae of the house fly presented the least number of preys, yet they highly stimulated the predator fecundity. Feeding on immatures T. putrescentiae induced the least number of laid eggs. With the raise of temperature the total amount of preys consumed decreased, yet the daily mean increased. The predator female fecundity was positively correlated with temperature. Zusammenfassung Zsur Wirkung der Beute und Temperatur auf die Entwicklung und Biologie der Raubmilbe Cheyletus malaccensis Oud. (Acari, Cheyletidae) Cheyletus malaccensis wurde in allen Entwicklungsstadien mit Eiern, Larven, Nymphen und Adulten der Milbe Tyrophagus putrescentiae gefüttert. Dabei erzeugten die Beute‐Eier und Larven kürzere Entwicklungszeiten als die Nymphen und Adulten. Die Beutezahl war mit der Beutegröße negativ korreliert. Während der Larvenentwicklung bevorzugte die Raubmilbe die Larven der Beute‐Milbe, gefolgt von deren Eiern, Nymphen und Adulten. Eier und Larven der Stubenfliege wurden am wenigsten von allen Beutearten gefressen, führten jedoch zu einer hohen Eizahl der Raubmilbe. Die geringste Eizahl entstand nach dem Fraß von immaturen Stadien der Beute‐Milbe. Mit steigender Temperatur nahm die Gesamtzahl verzehrter Beutetiere ab, jedoch das tägliche Mittel zu. Die Eizahl der Raubmilbe war mit der Temperatur positiv korreliert.

Objectives: This study was conducted to investigate marginal adaptation, compressive strength, water sorption, solubility, fluoride and calcium release of a claimed bioactive restorative material (ACTIVA BioACTIVE Restorative) compared to glass ionomer (Fuji IX) and resin composite (SphereTEC). Materials and methods: ACTIVA was evaluated relative to Fuji IX and SphereTEC one. Marginal gap width was detected via scanning electron microscope before and after thermo-cycling. Compressive strength was tested using universal testing machine. For measuring water sorption and solubility, specimens were immersed in distilled water, subjected to drying cycles and weighed. Fluoride ion release was measured using ion-selective electrode while released calcium ions were detected using Atomic Absorption Spectrophotometer after 1, 14 and 28 days. Data analysis was performed using ANOVA, paired t-test and independent sample t-test. Results: Marginal gap was reduced in both ACTIVA and Fuji IX after thermocycling while it increased in SphereTEC one. After thermo-cycling, the marginal gap was larger in dentin compared to enamel. SphereTEC one showed the highest compressive strength mean value. Fuji IX represented the highest water sorption values, followed by ACTIVA which also exhibited the highest solubility. Fuji IX showed higher fluoride release than ACTIVA whose calcium release did not reach 1ppm. Conclusion: ACTIVA restoration can provide a potential marginal seal. Activa's compressive strength was limited compared to resin composite. ACTIVA's water sorption and solubility are within the acceptable range. However, its fluoride and calcium release was limited.