Speciation can be defined as the distribution of an element among defined chemical species in a system, and speciation analysis as the analytical activities of identifying and/or measuring the quantities of one or more individual chemical species in a sample. 1.3 Structural aspects of speciation: The definitions of species and speciation of elements are based on several different levels of atomic and molecular structure where species differences are manifest.
Noun. 1. rickshaw-a small two-wheeled cart for one passenger; pulled by one person. jinrikisha, ricksha. cart-a heavy open wagon usually having two wheels and drawn by an animal.oun. 1. rickshaw-a small two-wheeled cart for one passenger; pulled by one person. jinrikisha, ricksha. cart-a heavy open wagon usually having two wheels and drawn by an animal.
Scrimshaw is the name given to scrollwork, engravings, and carvings done in bone or ivory.round this time is the earliest authenticated pictorial piece of sperm whale scrimshaw (1817). The tooth was inscribed: This is the tooth of a sperm whale that was caught near the Galapagos islands by the crew of the ship Adam [of London], and made 100 barrels of oil in the year 1817..