Table of Contents: 1  INTRODUCTION, DEFINITION & VALUE OF RESEARCH. 2  SCIENTIFIC METHOD OF RESEARCH & ITS SPECIAL FEATURES. 3  CLASSIFICATION OF RESEARCH:Goals of Exploratory Research. 4  THEORY AND RESEARCH:Concepts, Propositions, Role of Theory. 5  CONCEPTS:Concepts are an Abstraction of Reality, Sources of Concepts.
Lead poisoning is a serious and sometimes fatal condition. It occurs when lead builds up in the body. Lead is a highly toxic metal and a very strong poison. It is found in lead-based paints, including paint on the walls of old houses and toys.
Interesting Lead Facts: Lead has been in use by ancient civilizations for thousands of years, and is mentioned in the second book of the Old Testament. Lead pipes on the baths have the official insignia of the Roman emperor and are still in use today. Lead has a long history in alchemy, since many alchemists believed lead could be turned into gold. Lead is one of the toxic elements whose poisonous properties were discovered even by early civilizations, and lead poisoning has been documented in writings from ancient Greek, Roman, and Chinese. Lead acts as a neurotoxin, damaging the central nervous system.