Entrevista com Jean-Pierre Berlan

Abstract

Seus trabalhos tratam da transformação da agricultura no século xx, e do papel da genética agrícola. É autor de La guerre au vivant: OGM et autres mystifications scientifiques, 1 e de inúmeros artigos, entre os quais "Political economy of agricultural genetics", 2 "La faim dans le monde, les OGM et l'Académie des Sciences" 3 e, em colaboração com Richard Lewontin, "Plant breeders' rigths and the patenting of life forms", 4 "The political economy of agricultural research", 5 e "La menace du complexe génético-industriel". 6 Gostaríamos em primeiro lugar de ouvi-lo sobre sua formação intelectual, e seus temas de pesquisa.

Multiple observations of cavitation cluster dynamics close to an ultrasonic horn tip

“…The ultrasonic horn is one of the most common commercial ultrasonic devices, and yet its mode of operation is surprisingly complex. Through the application of an approximately sinusoidal continuous-wave (or sometimes tone-burst) voltage (of centre frequency f 0 usually in the region of [20][21][22][23][24][25][26][27][28][29][30] to the piezoelectric stack in the shaft of the horn, the tip of the horn undergoes an approximately sinusoidal oscillation of a few 10's of microns at f 0 . The tip being immersed in a liquid, and the wavelength in the liquid at f 0 being much larger than the tip diameter, the direct sound field amplitude falls off rapidly with distance from the tip (as a dipole if the tip is only shallow, and as a monopole if it is very deep, which is rare).…”

“…Examples inertial cavitation effects include local hot spots [11][12][13] , light emission [14][15][16] , radical generation [17][18][19] , shock waves 20,21 and material erosion [22][23][24] or production 25 . These effects are potentially useful within a chemical environment where, for example, the processing 26 of materials or the destruction of organic pollutants is desired [27][28][29] . However, non-inertial cavitation can affect inertial cavitation in many ways, for example by shielding the sound field, setting up microstreaming currents which affect the transport of bubble nuclei and dissolved gases etc 30,31 .…”

20 years of transgenics in Brazil: reflections for Lula government 3

“…Teenager with leprosy and self-stigma: The role of education transgenic seeds is a reality that generates great concern in discussing food sovereignty, given the power of capital over seeds (Berlan, 2011;Lima, 2021), which can be considered a heritage of humanity, of the cultivating peoples (Fernandes, 2007). A powerful weapon for coping with this power is the organization of society, as seen in Syngenta's attempts to patent seeds with Terminator technology and a wide-coverage patent on various vital genetic sequences of rice, which were barred, thanks to the action of the ETC Group (Ribeiro, 2011).…”