This work investigated the effects of increasing temperature from 30°C to 47°C on the physiological and genetic characteristics of Saccharomyces cerevisiae strain 63M after continuous fermentation with cell recycling in a system of five reactors in series. Steady state was attained at 30°C, and then the temperature of the system was raised so it ranged from 35°C in the last reactor to 43°C in the first reactor or feeding reactor with a 2°C difference between reactors. After 15 days at steady state, the temperature was raised from 37°C to 45°C for 25 days at steady state, then from 39°C to 47°C for 20 days at steady state. Starter strain 63M was a hybrid strain constructed to have a MAT a/α, LYS/lys, URA/ura genotype. This hybrid yeast showed vigorous growth on plates at 40°C, weak growth at 41°C, positive assimilation of melibiose, positive fermentation of galactose, raffinose and sucrose. Of 156 isolates obtained from this system at the end of the fermentation process, only 17.3% showed the same characteristics as starter strain 63M. Alterations in mating type reaction and in utilization of raffinose, melibiose, and sucrose were identified. Only 1.9% of the isolates lost the ability to grow at 40°C. Isolates showing requirements for lysine and uracil were also obtained. In addition, cell survival was observed at 39-47°C, but no isolates showing growth above 41°C were obtained.
In this article I will analyse a body of documents that shed new light on the activity of the BBC Latin American Service (LAS) during the Second World War. These documents have the potential to reveal how entertainment programmes commissioned by the Corporation to be broadcast to Latin America were used as part of propaganda campaigns, designed to counter Nazi-Fascist influence in the region. These documents consist of: the minutes of BBC LAS Propaganda Policy Committee meetings, held in the presence of the Ministry of Information (MOI) staff members; correspondence exchanged between the BBC and the MOI; as well as original radio drama scripts written in Portuguese by Brazilian journalist, novelist and playwright Antônio Callado, which were broadcast to Brazil by BBC LAS in 1943. Callado's scripts function as a case study to discuss the impact of propaganda policies in LAS entertainment programmes. KEYWORDS BBC; Second World War; propaganda; radio; Latin America; Antônio Callado In this article, I will analyse a body of documents that shed new light on the activity of the BBC Latin American Service (LAS) during the Second World War. These documents have the potential to reveal for the first time how entertainment programmes commissioned by the Corporation to be broadcast to Latin America were used as part of propaganda campaigns, designed to counter Nazi-Fascist propaganda in the region and gain sympathy for the British and the Allies. These documents consist of: the minutes of BBC LAS Propaganda Policy Committee meetings, held in the presence of the Ministry of Information (MOI) staff members; correspondence exchanged between the BBC and the MOI; as well as original radio drama scripts written in Portuguese by Brazilian journalist, novelist and playwright Antonio Callado , which were broadcast to Brazil in 1943. The aim of this article is twofold. First, I will investigate how propaganda policies developed by the MOI and the BBC LAS impacted the work of creative writers such as Callado. Secondly, I will discuss to what extent Callado managed to accommodate his literary ambitions and his own political agenda while working within the BBC/MOI anti-Nazi propaganda machine.Callado was a leading voice in the Brazilian section of LAS between 1941 and 1947, and his dramas are representative of the best productions transmitted by LAS in Portuguese during
Utilização da cinza do bagaço de cana de açúcar no processo de purificação do biodiesel produzido a partir de óleos e gorduras residuaisUse of sugar cane bagasse ash in the purification of biodiesel production from residual oils and fats
O objetivo desta nota de pesquisa é produzir uma reflexão sobre a relação entre pesquisador e documentação num mundo marcado por um processo de digitalização de acervos que tem potencial para transformar definitivamente as interações entre o historiador e suas fontes. Este texto busca discutir a noção de-documentação‖ à luz dessas mudanças, pensando em que medida a percepção que o pesquisador tem de suas fontes pode ser mediada por um jogo de olhar e desvelamento cujos efeitos heurísticos frequentemente resistem à teorização, jogo esse aqui esboçado através da ideia de-dimensão aurática‖ da documentação. Por fim, busca-se ilustrar o percurso de formulação dessas reflexões reportando à descoberta de fontes inéditas nos arquivos da BBC, Inglaterra.
Em comemoração pelos 15 anos de luta, resistência e implementando, na melhor das maneiras, o pensamento como ação, o que é e tem sido bandeira e lema do Laboratório de Estudos das Diferenças e Desigualdades Sociais nesses últimos 15 anos,
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