Rhythmic movements are often controlled by systems containing coupled subnetworks whose oscillations are of different frequencies. We show how fast inhibition from the pyloric network interacts with a slow modulatory input to control the frequency of the gastric mill rhythm of the crustacean stomatogastric ganglion. We deduce that the timing of the pyloric input is crucial in determining what a...

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abstract in order to provide optimal yield and quality of tomato fruit (lycopersicon esculentum mill. cv. beril), different growing media for soilless culture of tomato plants were studied. seedling of tomato (lycopersicon esculentum mill, cv. beril ) were cultivated in perlite, mixture of perlite with nh4-zeolite and with raw zeolite (z:p ratio 10v:90v) and fed by two nutrient sources: a) comp...

A small mill has been developed for reducing nail clippings to a convenient size for microscopy and inoculation onto isolation media. The milling process acts to pulverize and homogenize the specimen. The use of a homogeneous sample in microscopy increases the opportunity for the discovery of fungal hyphae in a specimen. The use of a pulverized specimen increases the possibility of culture isol...