### Direct-Current theory

Direct-Current When it is connected a continuous conductive path, like a wire with a battery terminal, we obtain an electric circuit. The device which receives charging from a battery is not always a wire, […]

### Radicals theory

Radicals Radicals are expressions with the form: Where n Є N and a Є R; provided that when a is negative, n must be odd. n=index; a=radicand; m=exponent. A radical can be expressed […]

### BIOPROFE RELEASES NEW WEBSITE

June of 2016 is going to be very important to BioProfe. Throughout this month our new website http://www.bioprofe.com will begin to work. Our web portal is completly renewed to offer to our users a more […]

### Chemical Kinetics theory

Chemical Kinetics Chemical Kinetics studies the speed of chemical processes and determines the factors which influence on it. It aims is to find mathematical expression that relates the speed of a chemical reaction with […]

### Van der Waals Forces

Van der Waals Forces theory Van der Waals forces, although they don’t form a chemical bond theirselves, they are responsible for the attraction between neutral and saturated molecules, which result in the condensed states […]

### Logarithms Theory

Logarithms Definition of Logarithms: Be a positive real number non-zero and different to 1, and A another positive and non-zero number. It is called the logarithm of the number A in the base a, […]

### Fractions theory

Fractions Definition of Fractions A fraction is the quotient of two integers a and b, which is represented as follows: b -> denominator, indicates the number of parties that has been split the unit. […]

### Periodic System Theory

Periodic System The current Periodic System is based on the one which was proposed by Mendeleiev with the inherent corrections to Moseley’s law, as it is said, used as sort order atomic number. It […]

### Rotation theory

Rotation A Rotation is a circular movement of an object around a center (or point) of rotation. A three-dimensional object rotates always around an imaginary line called a rotation axis. A rotation of a […]

### Matrices operations theory

Matrices additions and subtractions theory The sum of two Matrices (Aij), (Bij) of the same dimension, is another matrix (Rij) of the same dimension and with generic term sij=aij+bij. Therefore, to be able […]