an action is followed by an increase in dopamine activity, the basal ganglia circuit is altered in a way that makes the same response easier to evoke when similar situations arise in the future. [ ] this is a form of operant conditioning , in which dopamine plays the role of a reward signal. [ ] reward...
the laser-firing sounds tend to occur in a series of repeated strengths and decibels. it is not found in many ancient archaeological diggings for a good reason, as the stones do not last for thousands of years. when it pertains to picking find many great new & used options and get the best deals for...
plumbing system was discovered. the egyptians found that adding a small amount of tin made the metal easier to cast, so bronze alloys were found in egypt almost as soon as copper was found. the use of copper in ancient china dates to at least b.c.e. by b.c.e., excellent bronzes were being made in china...
"just all sorts of crazy stuff," he says, laughing. fishing — and preparing his catch — has always been an integral part of cimarusti's life. that dedication is evident in his work. cimarusti, who won the james beard foundation's best chef: west award, specializes in fresh, sustainable and local seafood...
the philippines, - . m hectares are infested with golden apple snail. in , p m was spent to control this pest. the first account that it had become a major pest was recorded in when about hectares of irrigated rice farms in region (cagayan valley) were heavily damaged. since then, rice area infested...
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demand it leads to a glut in the market and consequently prices become uneconomic. all agricultural commodities have this inherent problem. when a product depends upon an export market also, the situation becomes more complex. a setback in the markets in new york or london affects the farmers in the...
demand it leads to a glut in the market and consequently prices become uneconomic. all agricultural commodities have this inherent problem. when a product depends upon an export market also, the situation becomes more complex. a setback in the markets in new york or london affects the farmers in the...
. [ ] . this battery consisted of a pile of zinc and copper discs separated by brine soaked cardboard. a british chemist named john frederic daniell searched for a way to eliminate gas buildup in the voltaic pile. his solution was to use a second electrolyte to consume the hydrogen produced by the first...