The Net (substance) The Net (substance) The Net, in alchemy, is an alloy of copper and iron, whose crystal structure induces a network pattern on its surface. It was described in the 17th century by Sir Isaac Newton. Newton produced the substance by following what he regarded as a recipe, encoded in classical mythology, for part of the process of achieving the philosopher's stone. The relevant myth involved the god Vulcan finding his wife Venus (alchemical symbol for copper) in bed with the god Mars (alchemical symbol for iron) Newton's interpretation rested on typical alchemical associations, construing Vulcan as a stand-in for fire,
Substance P abdominal pain. This protozoan was found to secrete serotonin as well as substance P and neurotensin. Despite strong preclinical rationale, efforts to demonstrate efficacy of SP antagonists in inflammatory disease have been unproductive. A study in women with IBS confirmed that an NK1RAs antagonist was anxiolytic. In line with its role as a first line defense system, SP is released when toxicants or poisons come into contact with a range of receptors on cellular elements in the chemoreceptor trigger zone, located in the floor of the fourth ventricle of the brain, the (area postrema). Presumably, SP is released in or