RESUMO:A ocorrência de quedas constitui uma das principais causas de morbidade e mortalidade na população idosa, tendo se tornado um problema importante de saúde pública devido aos altos custos sociais e financeiros que acarreta. O objetivo deste estudo foi determinar a prevalência de quedas em idosos vinculados a uma unidade básica de saúde. Trata-se de estudo descritivo transversal com a avaliação de idosos a partir de dois instrumentos: um relacionado aos dados só-ciodemográficos e outro sobre a ocorrência de quedas nos últimos 12 meses. Os dados foram processados e analisados por meio do SPSS® versão 20.0 para Windows. No total, 97 idosos com média de idade de 70,5 anos (+ 8 anos) participaram do estudo 32 idosos referiram ter caído pelo menos uma vez nos últimos 12 meses, estimando prevalência de 33% (32/97; IC 95%: 24,2% -42,8%) de quedas entre os participantes. O número de quedas variou de uma a 10 vezes no último ano, com média de duas quedas por idoso (+ 2 quedas). A queda da própria altura (87,5%) e ocorrida fora do domicílio (31,3%), foi a mais referida. O medo de cair novamente foi a consequência permanente da queda mais apontada pelos idosos. A prevalência de quedas neste estudo apresentou índices importantes, trazendo repercussões negativas para a saúde dos indivíduos. PALAVRAS-CHAVE:Acidentes por quedas; Idoso, Atenção primária à saúde. PREVALENCE OF FALLS BY THE ELDERLY IN A HOME COMMUNIT YABSTRACT: Falls are the main causes of morbidity and death in elderly people. They are an important issue in public health due to high social and financial costs. Current descriptive and transversal analysis deals with the prevalence of falls in the elderly linked to a health unit. It also evaluates them through socio-demographic data and the occurrence of falls during the previous 12 months. Data were processed and analyzed by SPSS® 20,0 for Windows. Further, 97 elderly people, averaging 70,5 years (+ 8 years) participated, of whom 32 suffered at least one fall during the last 12 months, with a prevalence of 33% (32/97; IC 95%: 24,2% -42,8%) among the participants. The number of falls ranged between one and 10 during the previous year, averaging two falls per elderly (+ 2 falls). Falls from one´s height (87,5%) and outside one´s home (31,3%) were the most common. Fear of falling once more was a permanent consequence indicated by the elderly. Prevalence of falls in current analysis showed important indexes with negative causes on individual health.

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Thermogravimetric analysis and analytical pyrolysis were used to investigate the decomposition of pure soybean hulls and hulls impregnated with metal chlorides (NaCl, ZnCl 2 and MgCl 2 ). Each additive was studied at contents of 10, 20 and 30 % in mass concentration. Thermogravimetric analyses were performed at different heating rates (5, 10, 15, 20 and 25°C min -1 ) under inert nitrogen atmosphere. Analytical pyrolysis experiments were carried out at 550 and 650°C, and the pyrolysis products were analyzed by gas chromatography and mass spectrometry. The mass loss and derivative mass loss curves of soybean hulls impregnated with salts showed a decrease in the decomposition temperature and reduction in maximum degradation rate for the samples containing ZnCl 2 and MgCl 2 . The samples impregnated with NaCl showed an increase in the decomposition temperature and reductions in the maximum degradation rate. Considering analytical pyrolysis results, samples with MgCl 2 and ZnCl 2 presented increases in aldehydes and reductions in acid and ester contents. The addition of NaCl did not present an important effect on pyrolysis products from soybean hulls. The study concerning the thermal decomposition of soybean hulls to which metal chlorides were added is not registered in previous works. Results indicated that the addition of ZnCl 2 and MgCl 2 reduced the thermal degradation temperatures and that the studied mixtures can be used as sustainable raw materials for the production platform of fuels and value-added chemicals.

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