No abstract

Energetic tobacco (EnT) is a type of genetically modified tobacco with a focus on energy. Its seeds are larger and appear in greater quantity than those of conventional tobacco. This plant easily adapts to unproductive soils and is practically free of nicotine. The oil seed from EnT can be used for producing biodiesel without competition with edible oils. Additionally, the resulting residual cake can be thermally degraded to bio-oil and biochar through pyrolysis processes. In this study, the fast pyrolysis (700 °C at 100 °C min–1) of the residual cake of EnT seeds was performed in a fixed bed reactor (quartz), yielding approximately 40% (in mass) liquid products (bio-oil and an aqueous phase). After removal of the aqueous phase, the organic phase was submitted to an acid–alkaline extraction of the N-compounds in a simple and efficient way. The bio-oil and alkaline extract were analyzed by comprehensive two-dimensional gas chromatography coupled to fast-quadrupole mass spectrometry. Compounds were tentatively identified by similarity with a commercial library of mass spectra and using retention indexes. The main classes of compounds identified were phenols, hydrocarbons, and N-compounds (imidazole, pyridine, and their derivatives), with the potential to be applied in the chemical and pharmaceutical industries as well as biofuel production. The alkaline extraction resulted in the isolation of the main N-components, a finding fundamental for the utilization of these compounds for the production of pharmaceuticals, pesticides, and polymers.

Exceto onde especificado diferentemente, a matéria publicada neste periódico é licenciada sob forma de uma licença Creative Commons -Atribuição 4. //dx.doi.org/10.17058/reci.v6i4.8198 Páginas 01 de 05 não para fins de citação Background and Objectives: Green tobacco sickness is an acute intoxication, caused by the dermal absorption of nicotine from the tobacco leaf. The triad to verify the presence of the disease is described by altered cotinine levels, exposure to tobacco and manifestation of symptoms such as diarrhea, dizziness, headache, pallor, sweating, increased salivation, chills, weakness, abdominal pain, vomiting, nausea, as well as blood pressure and/or heart rate alteration. The aim of this study was to verify the occurrence of Green Tobacco Sickness (GTS) during the tobacco leaf classification period, as well as to analyze the sociodemographic and occupational profile of tobacco farmers. Methods: This is a cross-sectional study involving 52 tobacco farmers from the municipality of Candelária, in the state of Rio Grande do Sul (RS). Urine samples were randomly collected according to the sample inclusion criteria. The data were analyzed using the Statistical Package for Social Sciences (SPSS), version 23.0. Results: The study showed five cases suggestive of GTS, and that 31 farmers had altered cotinine levels during the tobacco leaf classification period, unlike previous studies that showed the presence of the disease during the harvesting period. Asymptomatic farmers with altered cotinine levels was another noteworthy finding. Conclusion: It is necessary to develop actions to monitor exposure to illnesses and occupational diseases to advance in the intersectoral actions of GTS prevention and health promotion among tobacco farmers. ABSTRACT ARTIGO ORIGINAL Doença da Folha Verde do Tabaco no período da classificação do tabaco: perfil sociodemográfico e ocupacional de fumicultores de um município do interior do Rio Grande do Sul