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We investigated whether capuchin monkeys cooperate to solve a task and to what extent they take into account the behaviour of another individual when cooperating. Two groups of capuchin monkeys (N=5 and 6) were tested in a task whose solution required simultaneous pulling of two handles which were too far from one another to be pulled by one monkey. Before(More)
BACKGROUND: A wide spectrum of lesions ranging from dysplasia to in situ carcinoma have to be considered when dealing with laryngeal precancerous conditions. Recently the concept of laryngeal intraepithelial neoplasia (LIN) was introduced. METHODS: A series of 259 consecutive cases of laryngeal keratosis was studied from 1976 to 1994. All patients entered(More)
riasis6'7). This has led to the general concept that PTK inhibition may combat hyperproliferative conditions which result from enhanced activity of PTKs8'9). Several synthetic inhibitors of PTKshave been characterized along with a number of natural products of microbial, plant and marine origin. Amongthese are tyrphostins9), erbstatm10), genistein1 1^ and(More)
The effects of mercury and copper on agonist-mediated Ca-signaling were investigated in isolated cells from the marine mussel, Mytilus galloprovincialis Lam., by single cell fluorescence microscopy. In isolated digestive gland cells, short-term exposure (10 min) to both Hg(2+), a highly toxic metal and Cu(2+), an essential metal, in the nano-low µM range(More)
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