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.
A rickshaw, or Jinrikisha, is a light, two-wheeled cart consisting of a doorless, chairlike body, mounted on springs with a collapsible hood and two shafts. Finished in black lacquer-ware over timber, it was drawn by a single rickshaw runner.ver time, cycle rickshaws (also known as pedicabs), auto rickshaws, and electric rickshaws and were invented. Pulled rickshaws created a popular form of transportation, and a source of employment for male laborers, within Asian cities in the 19th century.