Positive-negative theory

The Usanovich theory is the most general of all acid-base theories. According to Usanovich (1939) any process leading to the formation of a salt is an acid-base reaction. The so-called positive-negative definition of Usanovich runs as follows. 

Some behaviorists in the nineteenth century suggested that people have cyclical rhythms that influence behavior. People in a number of countries follow this premise and confirm the theory with their own behavior. The theory of biorhythms claims there are three rhythms that originate at birth. The three are physical, emotional and intellectual. They have 23-, 28-, and 33-day cycles, respectively, depicted by sine waves. Each cycle has three phases positive, negative, and transitional. The theory claims that congruence of the periods affects events, moods and actions of a person. One can easily find biorhythm calculators online. Do not confuse biorhythms with biological rhythms, such as circadian rhythm. 

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