Paramecium aurelia

As protozoa and nematodes live in pore water in the soil, most of the methods are adapted from toxicity tests designed for aquatic samples. Among the protozoa the tests with cihates Tetrahymena pyriformis, Tetrahymena thermophiia, Colpoda cucullus, Colpoda inflata, Colpoda steinii, Paramecium caudatum, and Paramecium aurelia have been developed [ 102,112-117]. It is the opinion of some authors that the sensitivity of infusorians is higher than that of microorganisms [115,116]. 

A requirement for A -sterols seems to be satisfied in different species by different methods. Whereas starfish reduce the A -double bond of cholesterol before introducing the A -double bond/ in Paramecium aurelia cholesterol (A ) is converted into 7-dehydrocholesterol In Penicillium rubrum ergosterol... 

The inability of some phyla of invertebrates to biosynthesize terpenoids from simple precursors was discussed in Volume 1 of this Report. Further examples of Platyhelminthes species have been reported. Sterols, however, are needed and are derived from the diet. In the Protozoan Paramecium aurelia, cholesterol is converted into cholesta-5,7-dienol. ... 

Beisson, J., and Sonneborn, T.M. (1965). Cytoplasmic inheritance of the organization of the cell cortex in Paramecium aurelia. Proc. Natl. Acad. Sci. U.S.A. 53, 275-282. 

Amoeba chaos chaos, 20°C A. chaos chaos, 25°C A. chaos chaos, 30°C Astasia klebsii, young, 25.2°C Chilomonas paramecium, 25°C Leishmania braziliensis, 32 °C Leptomonas ctenocephali, 28°C Paramecium aurelia, 20°C P aurelia, 25°C P aurelia, 35°C P caudatum, 20°C P caudatum, 25°C P. multimicronucleatum, 25°C Plasmodium cathemerium, 38°C P. knowlesi, 38°C Strigomonas fasciculata, 28°C... 

Some of the most widespread ciliates, e.g. Glaucoma scintillans, Colpidium colpoda and species of the Paramecium aurelia and the Tetrahymena pyriformis-complex very likely lack the ability to produce resting cysts, although they have... 

Figure 1.2 shows the number of lynx furs turned in to the Hudson Bay Company from 1820 to 1920. Distinct oscillations are seen with a period of about nine years. No data were available on the rabbit population, so we cannot be certain that the oscillations are due to a predator-prey interaction. However, controlled experiments have been performed in the laboratory with paramecia (Paramecium aurelia) that eat the yeast Saccharomyces exiguns (Figure 1.3). Notice how the predator population lags behind the population changes in the prey.

Table 4.17 Comparison between the ability of various local anaesthetics to stimulate ciliary reversal in Paramecium aurelia and their local anaesthetic potency...

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