Actress With Green Eyes

Fever rubber (Ciclo da drunk in Portuguese) was an important part of economic and social history of Brazil and Peru, also for South American countries with Amazonian territories, including Colombia, Ecuador and Bolivia. This fever is related to the extraction and marketing of rubber, was centered in the Amazon region, firing their colonization process, attracting wealth and causing social and cultural changes, as well as giving great impetus to Amazonian cities like Iquitos in Peru, Belém do Para in Brazil and in particular the Brazilian city of Manaus, until now the principal Amazon city and capital of Amazonas state.

rubber fever had its peak between 1879 and 1912 after experiencing a resurrection between 1942 and 1945.

The discovery of vulcanization and the air chamber in the 1850 decade led to a rush of rubber extraction. "

Overview
rubber
rubber is called the juice or latex of a variety of plants. There are several varieties of rubber, including rubber, balata and gutta percha. Trees rubber or rubber tree (in Portuguese) providing this material are rubber trees, the guayule, the ficus elastic and castilloa ulei, among others.

The first manufacturer of rubber products (rubber bands and suspenders) emerged in the French capital, Paris in the year 1803. No clutch, rubber still had some disadvantages: with increasing temperature, the gum base became more soft and sticky, while the decrease of this, the rubber becomes hard and brittle. American Indians were the first to discover and exploit the unique properties of natural rubber. Meanwhile, was Amazon Jungle where mining activity was developed from rubber or rubber tree rubber tree (in Portuguese), a tree belonging to the family Euphorbiaceae, also known as tree of fortune. The stem of this tree is removed a white liquid called latex, comprising 35% of hydrocarbons, highlighting the 2-methyl-1 ,3-butadiene (C5H8), commercially known as isoprene rubber or monomer. Latex is a substance almost neutral, with a pH of 7.0 to 7.2. But when left exposed to air for a period of 12 to 24 hours, the pH drops to 5.0 and undergoes coagulation spontaneously forming a polymer is rubber, represented by Formula chemistry (C5H8) n, where n is the order of 10,000 and has an average molecular mass 600,000 to 950,000 g / mol. The rubber obtained in this way has a number of disadvantages: Exposure to air causes the extracted liquid is contaminated with other materials (detritus), making it a sticky substance perishable due to the action of temperature. Through an industrial process, rubber is treated and disposed of the impurities is then subjected to a process called vulcanization, resulting in the disappearance of the undesirable properties of rubber. This Thus, the rubber becomes imperishable, resistant to solvents and temperature variations, acquiring excellent mechanical properties and losing its stickiness.