Análise da atividade e gasto fisiológico dos catadores de resíduos sólidos: a percepção da terapia ocupacional

The world’s transformation in the market has been causing changes in the working class. As those changes have come, the market calls for a high capacity from the workers. Due to that, the unemployment rate has increased and induced a new type of class worker: the Recyclable Material Collectors. In this job, the role of the collector is to return the materials to their commodity chain, and to accomplish this, two methods of collecting are used: one with a truck and the other with a manual collector car. This is one type of occupation which has an extenuating work time, where the worker is exposed to a high ergonomic risk. This study, which was labored from a quantitative and qualitative approach to exploratory method and field research, is intended to compare which collecting technique can be less weariness to the worker. To the purpose of comparison of the physiological work weight, the participants used the Polar FT7 frequency counter, which generated, in graphic form, the performance of the collector in both methods. According to the values presented, was concluded that three of the four participants had a higher physiological weariness by using the manual car collecting approach, concluding that this method is the one that brings most effort to the worker. Considering the results obtained in this research, it was possible to observe that the use of the manual car causes a higher damage to the health of the recyclable material collector.A transformação no mundo do trabalho tem causado mudanças no perfil da classe trabalhadora. Cada vez mais, o mercado de trabalho requer exigências e, como decorrência disso, a taxa de desemprego aumentou e fez surgir uma nova profissão, a de Catadores de Materiais Recicláveis. A função do catador é a de devolver os materiais à sua cadeia produtiva e, para isso, existem dois métodos de coleta: com o caminhão e com o carro manual de coleta. Essa é uma profissão que possui jornadas de trabalho extenuantes, nas quais o trabalhador está exposto a riscos ergonômicos. Esse estudo foi elaborado a partir de uma abordagem quantitativa e qualitativa de método explorátorio e pesquisa de campo; pretende comparar qual método de coleta causa menos desgaste ao trabalhador. Para fins de comparação da carga fisiológica do trabalho, os participantes utilizaram o frequencímetro Polar FT7 que gerou, em forma de gráfico, o desempenho do catador em ambos os métodos de coleta. De acordo com os valores expostos, avaliou-se que, dos 4 participantes, 3 apresentaram um maior desgaste fisiológico no método de coleta com o carro manual, sendo esta a forma pela qual o trabalhador realiza mais esforços. Considerando os resultados obtidos nessa pesquisa, foi possível observar que o uso do carro manual de coleta causa um maior prejuízo à saúde do catador de materiais recicláveis

Grandisin induces apoptosis in leukemic K562 cells

Abstract In this study, the potential antileukemic activity of grandisin, a lignan extracted from Piper solmsianum, was evaluated against the leukemic line K562. The cytotoxicity of grandisin (0.018 to 2.365 µM) was evaluated in K562 and normal peripheral blood lymphocytes by Trypan Blue Exclusion and MTT methods after 48h exposure to the drug. In both methods, cellular viability was concentration-dependent and the IC50 values were lower than 0.85µM. Analysis of K562 cells after treatment with grandisin showed that the cell cycle was arrested in the G1 phase with a 12.31% increase, while both S and G2 phases decreased. Morphological studies conducted after the exposure of K562 to grandisin revealed changes consistent with the apoptosis process, which was confirmed by anexin V stain and caspase activation. Thus, lignan grandisin showed antileukemic activities against the K562 cell line and the cell death process occurred via apoptosis

The Effect of the Sectoral Composition of Economic Growth on Rural and Urban Poverty

We examine the relationship between the sectoral composition of economic growth and the rural-urban composition of poverty. To this end, we use a new cross-country panel dataset consisting of 146 rural and urban poverty spells for 71 low- and middle-income countries. We find that rural (urban) poverty is highly responsive to agricultural (non-agricultural) productivity growth. The effect of agricultural productivity growth on rural poverty is particularly strong for countries with little dependence on natural resources. We also find that growth in the share of employment in the non-agricultural sector (i.e., structural transformation) reduces rural poverty, most notably for countries with a low initial level of development. These findings are robust to changes in key assumptions, including using alternative poverty lines. Finally, we use our estimates to examine the historical contribution of different sources of economic growth to rural and urban poverty reduction. Acknowledgement : We acknowledge the International Fund for Agricultural Development for supporting this research

IFAD RESEARCH SERIES 23 - The effect of the sectoral composition of economic growth on rural and urban poverty

We examine the relationship between the sectoral composition of economic growth and the rural-urban composition of poverty. To this end, we use a new cross-country panel dataset consisting of 146 rural and urban poverty “spells” for 70 low- and middle-income countries. We find that rural (urban) poverty is highly responsive to agricultural (non-agricultural) productivity growth. The effect of agricultural productivity growth on rural poverty is particularly strong for countries with little dependence on natural resources. We also find that growth in the share of employment in the non-agricultural sector (i.e. structural transformation) reduces rural poverty, most notably for countries at a low initial level of development. These findings are robust to changes in key assumptions, including using alternative poverty lines. Finally, we use our estimates to examine the historical contribution of different sources of economic growth to rural and urban poverty reduction across regions

IFAD RESEARCH SERIES 4 - The effects of smallholder agricultural involvement on household food consumption and dietary diversity: evidence from Malawi

Ceteris paribus, a 10 per cent increase in on-farm income share increases food consumption per capita by 2.9 per cent, calorie intake per capita per day by 1.7 per cent, and leads to small improvements in dietary diversity. There are significant differences in the relationship between on-farm income shares and caloric shares: a positive and significant relationship with the shares from energy-dense and low-protein cereals and grains, but not significant with shares from nuts/pulses and sugars. Negative relationships are found with shares from roots/tubers, vegetables/fruits, oils/fats and meat/fish/milk. While food consumption and dietary diversity increase with agricultural involvement, the quality of diets is an issue. As purchased calories are associated with richer/high-quality diets, particularly rich in protein, households with lower dependency on agriculture access those diets more easily. This highlights the importance of income diversification to dietary diversity. It also calls for the development and support of nutrition-sensitive agricultural value chains, nutrition education and crop diversification programmes to improve household food and nutrition security

IFAD RESEARCH SERIES 23 - The effect of the sectoral composition of economic growth on rural and urban poverty

We examine the relationship between the sectoral composition of economic growth and the rural-urban composition of poverty. To this end, we use a new cross-country panel dataset consisting of 146 rural and urban poverty “spells” for 70 low- and middle-income countries. We find that rural (urban) poverty is highly responsive to agricultural (non-agricultural) productivity growth. The effect of agricultural productivity growth on rural poverty is particularly strong for countries with little dependence on natural resources. We also find that growth in the share of employment in the non-agricultural sector (i.e. structural transformation) reduces rural poverty, most notably for countries at a low initial level of development. These findings are robust to changes in key assumptions, including using alternative poverty lines. Finally, we use our estimates to examine the historical contribution of different sources of economic growth to rural and urban poverty reduction across regions

IFAD RESEARCH SERIES 3 - Fostering inclusive outcomes in sub-Saharan African agriculture: improving agricultural productivity and expanding agribusiness opportunities

Despite strong per capita income growth, the structure of sub-Saharan Africa’s economies has not changed markedly in recent decades. In spite of a rapidly growing labour force and urbanizing populations, employment growth in rural areas in general and in non-farm sectors in particular has been slow, and poverty levels in those areas remain relatively higher than in urban areas. So, the key question is: how to catalyse economic transformations that foster inclusive and sustainable development? This is where the role of agriculture is key, given that the overwhelming majority of the population across the continent depends on it as a livelihood source. The case for increasing agricultural productivity to accelerate transformation, investment and industrialization is strongly supported by well-established conceptual frameworks and historical empirical evidence. Though recent gains have been encouraging, agricultural productivity in sub-Saharan Africa still lags behind other regions. The relatively low productivity has led to a loss of competitiveness in agricultural exports and the declining share of the region’s participation in global agricultural trade. Nonetheless, the potential of building on recent gains and developing an agribusiness sector that is responsive to and benefits from the work of smallholder farmers is enormous. This requires the prioritization of two main areas for policy and investment: (i) supporting the emergence of a modern agro‑industrial sector; and (ii) developing the potential of smallholders to engage in high-value activities across agricultural value chains

IFAD RESEARCH SERIES 4 - The effects of smallholder agricultural involvement on household food consumption and dietary diversity: evidence from Malawi

Ceteris paribus, a 10 per cent increase in on-farm income share increases food consumption per capita by 2.9 per cent, calorie intake per capita per day by 1.7 per cent, and leads to small improvements in dietary diversity. There are significant differences in the relationship between on-farm income shares and caloric shares: a positive and significant relationship with the shares from energy-dense and low-protein cereals and grains, but not significant with shares from nuts/pulses and sugars. Negative relationships are found with shares from roots/tubers, vegetables/fruits, oils/fats and meat/fish/milk. While food consumption and dietary diversity increase with agricultural involvement, the quality of diets is an issue. As purchased calories are associated with richer/high-quality diets, particularly rich in protein, households with lower dependency on agriculture access those diets more easily. This highlights the importance of income diversification to dietary diversity. It also calls for the development and support of nutrition-sensitive agricultural value chains, nutrition education and crop diversification programmes to improve household food and nutrition security