The first mention is which argues that substance is the same to say essence, i.e., what remains is one being more than States that is, changes that experiment. For example, when we say that someone suffered a substantial change in the way they behave is because already we do not recognise it for what you used to do.
At the behest of the philosophy the term applies to all what is in itself and not in another.
Meanwhile, the substance turned out to be an essential part in the work of the philosopher Aristotle, who in the third part of his work deals with the concept and called it metaphysics or first substance, because Aristotle calls substance to the privileged way of being, therefore, it is not essential to be called it accident. Then Aristotle, the concept continued being addressed by philosophy of course, for example, Descartes argued that the substance is that which is in itself, which is conceived by itself and that do not need anything else to be and a little later, Spinoza, he identified it with God.
On the other hand, the term is used with many recurrence to refer to the nutritional elements of food.
In the field of chemistry would be substance to the homogeneous system that presents a single component such as water. In case that the substance can not break down in others by physical processes is called it pure substance and in which cases that if can be called it compound substance, while the combination of pure substances are known as mixtures, still possible in these their separation by physical and mechanical procedures.
Another common use of the word is to refer to the most prominent part of a thing or matter, i.e., one in which resides all the interest. The substance of the story is that you haven't read yet.
In anatomy the white substance is one that is formed by the union of nerve fibers and the gray matter involves those areas of the central nervous system, just gray color, neuronal bodies and dendrites devoid of myelin.
Article contributed by the team of collaborators.