Paramecium behavior during video centrifuge-microscopy.

Video Microscopy

159 epidemiology. They expand on difficult concepts that their colleagues merely label and focus these topics as the essence of epidemiological issues. Issues presented are not complicated by elaborate vocabulary or intricate statistical detail. Those difficult statistical techniques are explained in a manner that attains the essence of statistical sophistication without becoming too simplistic...

Genetic dissection of behavior in paramecium.

(1972)1 have concluded from a reassessment of the widely accepted cytological evidence that eukary-otic cells have yet to be found in deposits younger than latest Precambrian. found that the frequency of biparental, or "exceptional," zygotes can be increased up to 50 percent if the mt+ parent is irradiated with ultraviolet light before mating. The term "cytoplasmic gene" is becoming confusing a...

Imaging of Endocytosis in Paramecium by Confocal Microscopy

GABAA receptor subunits identified in Paramecium by immunofluorescence confocal microscopy.

The presence of opioid, beta-adrenergic and cholinergic receptors has been demonstrated in ciliated protozoa, but little is known about gamma-aminobutyric acid (GABA) receptors. In this study we have analyzed the distribution of GABA(A)-type receptor subunits in Paramecium. Confocal laser microscopy using antibodies specific for alpha(1)-, alpha(2)-, alpha(3)-, alpha(6)-, beta(2/3)-, gamma(2)-,...

Membrane potential changes during chemokinesis in Paramecium.

Intracellular recordings show that (i) paramecia hyperpolarize slightly in attractants and depolarize in repellents that depend on the avoiding reaction (an abrupt change of swimming direction), and (ii) paramecia more strongly hyperpolarize in repellents and more strongly depolarize in attractants that depend on changes of swimming velocity. These membrane potential changes are in agreement wi...