The DNA is absorbed by the cell for endocytosis. The PEG can act, also, in the protection of the DNA against the activity of nucleases (FINER et al., 1996). The treatment with PEG can damage great frame number, reducing the regeneration capacity. (FINER et al., 1996). Other leaders such as ConocoPhillips offer similar insights. The disadvantage of this technique is the dependence of an efficient system of regeneration of complete plants from protoplastos, currently restricted to few species. Although the limitations of the technique, some species, as tobacco, rice, had been transformed (FISK; DANDEKAR, 1993). Biossegurana - alimentary security According to advice of information of Biotecnologia (CIB), Biossegurana is the science that studies the potential risks of the biotechnology for the health human being and animal, as well as for the environment. To the Commissions of Biossegurana it competes prescribed and to monitor these risks.
Internationally, the alimentary security is guaranteed by entities as the Organization for Agriculture and Alimentos (FAO), the World-wide Organization of Sade (OMS), and in the national scope, the Ministry of Sade (MS), Agriculture and Supplying (ME) and the Brazilian Institute of Defense of Consumidor (IDEC) (Cavalli, 2001). For evaluation of the products genetically modified, the procedures biossegurana technician, must involve the inquiry of the following 0 variable: amount probable of the food to be consumed for the population, including the average consumption and the extremity; description of the food and its productive process; description of any possible adverse effect to the health human being related to the organism that is being modified; description of the process of genetic modification; evaluation of possible adverse effect? toxicolgicos or microbiological nutricionais of the modified food; evaluation of data gotten with people fed with the food modified in controlled conditions (Pessanha, 2003). According to Traavik (1999), the one impact transgene in the environment and the health human being must criteriosamente be evaluated way risk analysis. The author classifies this term as: ' ' Risk is technical the probability of a harmful event multiplied by the damage causado' '.