100 resultados para Tabaco


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Pós-graduação em Enfermagem (mestrado profissional) - FMB

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Pós-graduação em Fisioterapia - FCT

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Pós-graduação em Fisiopatologia em Clínica Médica - FMB

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Introduction: The use of psychoactive substances by the student population has been the object of various studies in Brazil. Objective: To determine the prevalence of substance use among students. Methods: Quantitative study with a closed questionnaire based on standardized assessment instruments was developed. It consists of questions related to types of psychoactive substance use, abuse, frequency and duration of use, self-criticism regarding the use, consequences of use in relation to health, and misdemeanors committed under the influence of psychoactive substances. The sample included the participation of 268 students. A total of 183 (68.3%) questionnaires were analyzed, and only those with positive result for substance abuse at some point in life, the remainder, 85 (31%) questionnaires, had negative responses to psychoactive substances. Results: Students’ responses to the two years surveyed indicated that the first psychoactive substance used was alcohol (77.9%), followed by tobacco use (10.9%), and marijuana (7.6%). Of the students surveyed, 145 (79.2%) answered that still make use of psychoactive substances, and the current frequency of use varies from one or more times per week. When asked about the possibility of being or becoming drug addicts, 169 (92.3%) responded that they are not or will not become dependent. Conclusion: The results indicate the high rate of substance use among college students surveyed, and point to their contradiction to consider such psychoactive substances harmful to their health.

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The literature suggests an association between drug use and addiction and the repertoire of social skills of the individual. However, there are still relatively few studies focusing specifically on the relationship between smoking and social skills. Moreover, Brazilian studies on the subject are scarce. This paper presents a review of the literature about smoking and social skills, emphasizing the theoretical underpinning research, as well as the main data obtained so far. One of the most investigated issues is the relationship between assertiveness and smoking. It is assumed that the lack of assertiveness and in particular the ability to refuse the supply of drugs and / or peer pressure to consumption can be a risk factor for smoking initiation, especially in adolescents. However, the literature on this issue is still controversial. It is assumed that further studies to elucidate these associations could contribute to prevention programs and intervention for tobacco use, using social skills training as a strategy.

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In Brazil, smoking incidence varies between 9.5% and 21.2% and it is more common among men. In college students incidence can reach 14% depending on the region, which is quite disturbing. Joining college is a crucial period for the commencement or maintenance of smoking. The Knowledge among college students about tobacco use is critical to devise strategies for intervention in this population. The objectives were to establish the occurrence of smoking and risk factors, nicotine dependence in college students and college goers. We interviewed students, teachers and administrative personnel from the Philosophy and Science School at UNESP at Marilia, from both sexes, regardless their age, which visited the First Week Against Tobacco event. The sociodemographic data, smoking status, time as a smoker, cigarettes smoked, date when they started smoking, history of smoking in the family, friends or associates were questioned. We also assessed the degree of motivation to quit smoking and the degree of nicotine dependence. Data were presented using descriptive statistics. Comparisons between categorical variables were made using the chi-square test (p <0.05). A total of 432 people, 180 men and 252 women, average aged 22.6 ± 6.9 years were researched. From the volunteers studied, 267 (61.8) had tried cigarettes and 171 of them (64%) reported that they were offered by friends. As a whole, 79 (18.3%) of these people were smokers, 52 (65.8%) reported intending to quit smoking and in 37 of them (46.8%), the degree of nicotine dependence was very low. Of all the smokers, 63 had smokers in the family and all of them had friends who smoked. 28.9% of all men were smokers and 10.7%of all women. The occurrence of smoking was 18.3% and the risk factor associated to smoking habit is related to friendship and family, and very low nicotine dependence.

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The gene encoding TCTP (Translationally Controlled Tumour Protein) is present in all eukaryotes and its product is involved in various cellular processes. Although well characterized in mammals, there are only few works available in the literature related to the analysis of this protein in plants. In this present work, the expression of the gene encoding TCTP was analyzed in different organs/tissues of tomato plants (Solanum lycopersicum cv. Santa Clara). A quantification performed by RT-qPCR revealed the presence of TCTP transcript in all tissues/organs analyzed, with the highest expression level found in leaves. With the exception of fruits in intermediate stage of maturation, for which a small increase on the expression was detected, there was minimal variation in the relative expression of TCTP in other organ/tissues. In parallel, the effects of the constitutive expression of TCTP were investigated using transgenic tobacco lines able to overexpress this protein at different levels (T1, T2 and T3). Seedlings of these lines, and of a non-transgenic control line, were grown in MS culture medium for 21 days. At the end of this period, the length of roots and leaves was taken and the seedlings were photographed. According to Tukey's test, the analysis of the mean root length revealed a significant difference between T1 and T3 lines when compared to the control, although the same was not observed for the T2 line. For leaves, according to Kruskal-Wallis test, there was a statistical difference between the averages of leaf growth obtained for the different lines evaluated. According to these results, we can conclude that TCTP shows an ubiquitous expression in tomato plants, with the highest expression detected in leaves, and also that its overexpression promoted a higher root and leaf development in two of three transgenic tobacco lines tested

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O transporte mucociliar é um mecanismo de defesa muito importante do trato respiratório, e é por meio deste que agentes agressores são carregados e expelidos. As substâncias presentes na fumaça do cigarro provocam mudanças no sistema respiratório, incluindo no transporte mucociliar. Objetivos: Avaliar o efeito agudo do fumo no transporte mucociliar de indivíduos tabagistas em diferentes momentos e comparar com grupo controle. Métodos: Foram avaliados 20 tabagistas (10 homens; 46 ± 13 anos; 26 ± 22 anos/maço; 19 ± 10 cigarros/dia) em quatro momentos: após 12 horas de abstinência, imediatamente, 20 minutos e 2 horas após fumar. No primeiro momento foram obtidos dados pessoais, história tabágica (anos/maço, cigarros/dia e grau de dependência de nicotina), e após 12 horas em abstinência do tabaco foi realizado o teste de função pulmonar (espirometria), quantificação do monóxido de carbono no ar exalado (COex) e mensuração do tempo de trânsito de sacarina (TTS) ...(Resumo completo, clicar acesso eletrônico abaixo)

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A caracterização e isolamento do gene com expressão específica em raiz de café (Coffea arabica) que codifica uma peroxidase (CaPOX) e suas respectivas regiões promotoras, permitiu realizar a caracterização da expressão desse gene em reposta a estresse biótico (infecção por nematóides) assim como a análise funcional do seu promotor. Promotores tecido-específicos responsáveis pela regulação de genes responsivos a estresses bióticos tornam-se fundamentais em programas biotecnológicos que visam o aumento da resistência e tolerância vegetal. Partindo desse princípio, realizou-se a quantificação da expressão relativa do gene CaPOX em raízes de café utilizando plantas de Coffea arabica de um cultivar susceptível (Mundo Novo) e de outro cultivar resistente (IAC 388-17-1) a nematóides, respectivamente. Em paralelo utilizou- se plantas transgênicas de tabaco (Nicotiana tabacum SR1) contendo a versão completa do promotor do gene CaPOX em fusão transcricional ao gene repórter uidA (que codifica a β-glucuronidase; GUS) . A partir disso, pode-se observar que o gene CaPOX tem sua expressão aumentada em resposta a infecção por nematóides, sendo que a indução observada ocorre nos tempos iniciais pós-inoculação. Da mesma maneira, o promotor do gene CaPOX é responsivo a infecção por nematóides, sendo ativado nos tempos iniciais pós-inoculação

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The Coffee Genome Project made available to the scientific community relevant information that made practical the identification and cloning of important genes, as well as the identification of the major sequences involved on their regulation. The aim of the present study was to amplify, clone and sequence coffee promoters with specific expression patterns. For that, coffee ESTs which known expression profiles were employed. First, the promoter regions of coffee genes showing, respectively, fruitspecific and ubiquitous expression were amplified using the Genome Walking strategy. Amplified sequences were then inserted in the pGEM-Teasy vector (Promega) and sequenced. Once completed the sequencing, an expression cassette was constructed using the binary vector pCAMBIA-1381z (Cambia). These expression cassettes were cloned into Agrobacterium tumefaciens, and transgenic tobacco plants were generated aiming the functional characterization of these promoters

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A produção de eucalipto no Brasil, impulsionada pelo avanço na tecnologia florestal, tem alcançado índices satisfatórios a nível mundial nos últimos anos. No entanto, apesar de todo o desenvolvimento já obtido, a realização de novas pesquisas que tenham como objetivo aumentar a produtividade do eucalipto com áreas cultivadas reduzidas é muito relevante. A associação do melhoramento genético convencional com técnicas modernas de cunho biotecnológico é imprescindível para que tal benefício seja alcançado. Dentre as ferramentas moleculares necessárias para que tais objetivos sejam atingidos, a identificação e caracterização de promotores órgão-específico representa uma prioridade. Nesse contexto, um EST de eucalipto com expressão específica em raiz foi identificado pelo nosso grupo junto ao banco de dados do projeto FORESTs. A região promotora correspondente foi então amplificada usando a técnica de genome walking. A fim de dar continuidade ao processo de caracterização funcional deste promotor, no presente estudo o fragmento amplificado foi sequenciado, um cassete de expressão contendo o referido promotor foi construído, e plantas transgênicas de tabaco contendo tal cassete foram obtidas visando futuras análises funcionais