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National Repository of Grey Literature 179 records found  beginprevious178 - 179  jump to record: Search took 0.00 seconds. 
A role of adipokinetic hormones in insect lipid metabolism
 BÁRTŮ, Iva
This PhD. thesis summarizes the effect of adipokinetic hormones (AKHs) on a spectrum of mobilized lipids in model insect species the locust Locusta migratoria and the firebug Pyrrhocoris apterus. The results revealed that mobilization of diacylglycerols and fatty acids from the fat body into the haemolymph is not uniform and suggested there is partial specificity of individual AKHs. This could contribute to the answer of the question why some insect species have more than one AKH. The results of the thesis are supplemented by studies of AKH effect on lipid metabolism in stress conditions elicited by insecticide treatments. Co-application of AKH and insecticide enhanced the effect of insecticide
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Cold hardiness of larvae of the fruit fly, \kur{Drosophila melanogaster} (Diptera: Drosophilidae)
 KORBELOVÁ, Jaroslava
We assessed survival of larvae of the fruit fly, Drosophila melanogaster at low temperatures (0°C and 5°C) after rearing them under seven different acclimation regimes. Larvae that have developed in a standard diet at 25°C showed 50% mortality after 12,6 min of the exposure to 0°C (Lt50 = 0.21 h). In contrast, larvae that have developed in a diet enriched with glycerol at 15°C, and were cold acclimated at 5°C during last two days of their development, had Lt50 = 38.6 h. It means that it was possible to increase the Lt50 at 0°C more than 180-fold using simple manipulations with rearing temperatures and diet composition. The physiological differences in duration of larval development, fresh mass, dry mass, hydration and total contents of proteins, lipids and glycogen between the larvae belonging to different acclimation variants are described. The samples for future detailed metabolomic analysis were prepared.
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National Repository of Grey Literature : 179 records found   beginprevious178 - 179  jump to record:
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