seeds of the castor bean plant ricinuscommunis l (cb) contain ricin toxin (rt), one of the most poisonous naturally-occurring substances known. ricin toxin, a water-soluble glycoprotein that does not partition into the oil extract, is a ribosome-inactivating toxin composed of two chains, labeled a and b. severity of the toxicity varies depending on the route of exposure to the toxin. inhalation...

receptors and proteins are overexpressed in many human cancer cell membranes rather than normal tissues and are considered as the main molecular targets. specific tumor- targeting molecules which have high affinity for these receptors can be valuable tools as carrier molecules for targeted cancer therapy and imaging. pharmacokinetics and bioavailability of diagnostic and therapeutic agents are ...

The inability of current "classical" AI systems to handle unconstrained interaction with tbe real world has recently lead to a search for new control architectures for autonomous agents. We argue that simpler natural animals already exhibit most of the properties required by an autonomous agent, and suggest that designers of autonomous agents should draw directly upon the neural basis of behavi...

Abstract Biological agency has received much attention in recent philosophy of biology. But what is the motivation for introducing talk into biology and meant by “agent”? Two distinct motivations can be discerned. The first that thinking organisms as agents helps to articulate distinctive about vis-à-vis other biological entities. second treating agent-like a useful heuristic understanding thei...