Hemi example sentences

A particular mineral that will be formed from a certain combination of elements depends upon the physical and chemical conditions under which the material forms.Many human activities are producing chemicals, which are responsible for the depletion of ozone layer in the stratosphere, leading to the formation of ozone hole.Hazardous wastes such as inflammables, composite explosives or highly reactive substances are produced by industries dealing in metals, chemicals, drugs, pharmaceuticals, dyes, pesticides, rubber goods etc.For example, within a period, chemical reactivity tends to be high in Group 1 metals, lower in elements towards the middle of the table, and increases to a maximum in the Group 17 non-metals.But most of the chemical reactions fall into the category of either closed systems or open systems.Many techniques are used to control or reduce the formation of photochemical smog.Schrock Massachusetts Institute of Technology (MIT), Cambridge, MA, USA won the 2005 Nobel Prize in chemistry for work that reduces hazardous waste in creating new chemicals.Is there any other shorter way for representing chemical equations? Chemical equations can be made more concise and useful if we use chemical formulae instead of words.The main characteristic of this type of farming is the use of higher doses of modern inputs, e.g. high yielding variety (HY ) seeds, chemical fertilisers, insecticides and pesticides in order to obtain higher productivity.Faraday's first important work was on analytical chemistry.On the other hand, if a chemical signal were to be sent as well, it would reach all cells of the body and provide the wideranging changes needed.The various forms include potential energy, kinetic energy, heat energy, chemical energy, electrical energy and light energy.In order to maintain the current in a given electric circuit, the cell has to expend its chemical energy stored in it.In this unit the focus will be on environmental chemistry.Examples are oil refineries, paper factories, textile and sugar mills and chemical factories.