REPRESENTAÇÕES SÓCIO-RELIGIOSAS DO TRABALHO DOMÉSTICO: UMA LEITURA DE GÊNERO ENTRE BATISTAS NA CIDADE DE SÃO PAULO

Os movimentos de contestação social que tiveram lugar nos anos 60 trouxeram novas perspectivas para as mulheres, verificando-se crescente inserção destas no mercado de trabalho. No entanto, a persistência do trabalho doméstico sob responsabilidade dominante das mulheres, mesmo nesse contexto em que os índices de participação feminina no mercado de trabalho se elevam, tem chamado a atenção para os constrangimentos de ordem subjetiva e sócio-cultural como elementos decisivos dentre os que cooperam para a manutenção desse quadro. Ou seja, a desigualdade persiste em face da persistência de hierarquias de gênero que continuam a delimitar o lugar das mulheres e que encontram nas religiões o seu lócus privilegiado de produção e reprodução. É no contexto da economia simbólica batista, em que as representações tradicionais do homem como cabeça e da mulher como auxiliadora significam o homem como provedor e a mulher como esposa e mãe, responsável pelos afazeres domésticos, que abordamos aqui a problemática da divisão sexual do trabalho, enquanto e a partir da representação e prática de sujeitos religiosos batistas paulistanos. Ao mesmo tempo em que o discurso religioso batista afirma e ratifica a divisão sexual do trabalho, está sujeito às solicitações sociais por mudanças nas relações de gênero, favorecendo a mobilização de doutrinas religiosas igualitárias presentes entre os batistas. É, portanto, numa perspectiva dinâmica de tensões entre os avanços e permanências nas práticas de gênero ao nível da sociedade mais ampla, e que se colocam tanto a partir dos valores culturais desta, quanto a partir das condições materiais e estruturais encontradas aí, e de tensões entre o processo de secularização e compromisso ético que as representações e práticas de gênero entre os batistas pesquisados permanecem enquanto se transformam e avançam enquanto se mantêm.

Análise da eficácia de um refrigerador doméstico com condensador modificado: revestimento com meio poroso dissipativo

The development of home refrigerators generally are compact and economic reasons for using simplified configuration. The thermodynamic coefficient of performance ( COP ) is limited mainly in the condenser design for reasons of size and arrangement ( layout ) of the project ( design ) and climatic characteristics of the region where it will operate. It is noteworthy that this latter limitation is very significant when it comes to a country of continental size like Brazil with diverse climatic conditions. The COP of the cycle depends crucially on the ability of heat dissipated in the condenser. So in hot climates like the northeast, north, and west-central dispel ability is highly attenuated compared to the south and southeast regions with tropical or subtropical climates when compared with other regions. The dissipation in compact capacitors for applications in domestic refrigeration has been the focus of several studies, that due to its impact on reducing costs and power consumption, and better use of the space occupied by the components of refrigeration systems. This space should be kept to a minimum to allow an increase in the useful storage volume of refrigerator without changing the external dimensions of the product. Due to its low cost manufacturing, wire on tube condensers continue to be the most advantageous option for domestic refrigeration. Traditionally, these heat exchangers are designed to operate under natural convection. Not always, the benefits of greater compactness of capacitors for forced outweigh the burden of pumping air through the external heat exchanger. In this work we propose an improvement in convective condenser changing it to a transfer mechanism combined in series with conductive pipes and wire to a moist convective porous medium and the porous medium to the environment. The porous media used in the coating was composed of a gypsum plaster impregnated fiber about a mesh of natural cellulosic molded tubular wire mesh about the original structure of the condenser , and then dried and calcined to greater adherence and increased porosity. The proposed configuration was installed in domestic refrigeration system ( trough ) and tested under the same conditions of the original configuration . Was also evaluated in the dry condition and humidified drip water under natural and forced with an electro - fan ( fan coil ) convection. Assays were performed for the same 134- refrigerant charge e under the same thermal cooling load. The performance was evaluated in various configurations, showing an improvement of about 72 % compared with the original configuration proposed in humidification and natural convection.

Ocorrência de compostos de interesse emergente no aquífero Dunas-Barreiras e nos esgotos de Natal/RN

The detection of emerging interest microcontaminants in environmental samples of surface water, groundwater, drinking water, wastewater and effluents from water and sewage treatment plants (WTP and STP), in many countries, suggests these pollutants are widespread in the environment, mainly in urban areas. This is a reason for great concern, since many of these compounds are potentially harmful for humans other living beings, and they are not efficiently removed in the majority of WTP and STP, which is exacerbated by precariousness of water supply and sanitation services. In Natal, like other Brazilian cities, the sewage system serves only part of the urban area (about 30%), so that the rest of the wastewater is infiltrated in the sandy soil of the region in cesspool-dry well systems. This has resulted in contamination of groundwater in the area (sand-dune barrier aquifer, which supplies more than 50% of the city population), which has been observed by the increase in nitrate concentration in supply wells. The vulnerability of the sanddune barrier aquifer, combined with reports of the presence of emerging interest microcontaminants in Brazil and worldwide, led to this research, which investigated the occurrence of fifteen microcontaminants in Natal groundwater and sewage. Samples were collected at five wells used for water supply, the raw sewage and the effluents from biological reactors from STP (UASB and activated sludge reactors). Two samples of each sample were taken, with one week apart between the samples. To determine the contaminants, extraction of aquifer water, and raw and treated sewage samples were performed, through the technique of using SPE Strata X cartridge (Phenomenex®) to the aquifer water, and Strata SAX and Strata X (Phenomenex® ) for samples of raw and treated sewage. Subsequently the extracts were analyzed using GC-MS technique. Much of the analyzed microcontaminants were detected in groundwater and sewage. The concentrations in groundwater are generally lower than those found in the sewers. Some of the compounds (estrone, estradiol, bisphenol A, caffeine, diclofenac, naproxen, paracetamol and ibuprofen) are partially removed at STP.

Degradação fotocatalítica oxidativa do fenol utilizando carvão obtido da pirólise de diferentes biomassas

The modern industrial progress has been contaminating water with phenolic compounds. These are toxic and carcinogenic substances and it is essential to reduce its concentration in water to a tolerable one, determined by CONAMA, in order to protect the living organisms. In this context, this work focuses on the treatment and characterization of catalysts derived from the bio-coal, by-product of biomass pyrolysis (avelós and wood dust) as well as its evaluation in the phenol photocatalytic degradation reaction. Assays were carried out in a slurry bed reactor, which enables instantaneous measurements of temperature, pH and dissolved oxygen. The experiments were performed in the following operating conditions: temperature of 50 °C, oxygen flow equals to 410 mL min-1 , volume of reagent solution equals to 3.2 L, 400 W UV lamp, at 1 atm pressure, with a 2 hours run. The parameters evaluated were the pH (3.0, 6.9 and 10.7), initial concentration of commercial phenol (250, 500 and 1000 ppm), catalyst concentration (0, 1, 2, and 3 g L-1 ), nature of the catalyst (activated avelós carbon washed with dichloromethane, CAADCM, and CMADCM, activated dust wood carbon washed with dichloromethane). The results of XRF, XRD and BET confirmed the presence of iron and potassium in satisfactory amounts to the CAADCM catalyst and on a reduced amount to CMADCM catalyst, and also the surface area increase of the materials after a chemical and physical activation. The phenol degradation curves indicate that pH has a significant effect on the phenol conversion, showing better results for lowers pH. The optimum concentration of catalyst is observed equals to 1 g L-1 , and the increase of the initial phenol concentration exerts a negative influence in the reaction execution. It was also observed positive effect of the presence of iron and potassium in the catalyst structure: betters conversions were observed for tests conducted with the catalyst CAADCM compared to CMADCM catalyst under the same conditions. The higher conversion was achieved for the test carried out at acid pH (3.0) with an initial concentration of phenol at 250 ppm catalyst in the presence of CAADCM at 1 g L-1 . The liquid samples taken every 15 minutes were analyzed by liquid chromatography identifying and quantifying hydroquinone, p-benzoquinone, catechol and maleic acid. Finally, a reaction mechanism is proposed, cogitating the phenol is transformed into the homogeneous phase and the others react on the catalyst surface. Applying the model of Langmuir-Hinshelwood along with a mass balance it was obtained a system of differential equations that were solved using the Runge-Kutta 4th order method associated with a optimization routine called SWARM (particle swarm) aiming to minimize the least square objective function for obtaining the kinetic and adsorption parameters. Related to the kinetic rate constant, it was obtained a magnitude of 10-3 for the phenol degradation, 10-4 to 10-2 for forming the acids, 10-6 to 10-9 for the mineralization of quinones (hydroquinone, p-benzoquinone and catechol), 10-3 to 10-2 for the mineralization of acids.

Análise do desempenho de um refrigerador doméstico funcionando com uma válvula de expansão micrométrica

Household refrigerators are equipments that represent a significant portion on the eletricity consumption of Brazilian homes. The use of these devices with low energy efficiency contributes to increase the energy consumption. The energy efficiency of a refrigerator is a function of the interaction between the coolant fluid and the components of the thermodynamic cycle. Changes in load and/or nature of the coolant may modify the condensing and/or evaporation pressures. The volumetric capacity of the compressor, the mass flow of coolant and the compression power are dependent parameters of the condensation and evaporation pressures. Thus, the expansion devices exert an importante role in the balance of these pressures, being fundamental for the better performance of the refrigeration cycle. This experimental research aims to investigate the sensitivity of the performance parameters of a household refrigerator operating with R134a and at different evaporation pressures. Therefore, a small refrigerator was instrumented with temperature, pressure sensors and other variables of interest, installed along the cooling circuit, in order to allow the thermal mapping and the evaluation of the equipment performance parameters. The variation of pressure loss in the coolant fluid resulting from the operation of the expansion valve with micrometric adjustment that modifies the evaporation temperature, influencing significantly the performance parameters of the thermodynamic refrigeration cycle.

Avaliação da potencialidade de incorporação de um lodo de uma indústria de produtos de limpeza como adição mineral em concretos de cimento Portland

The generation of industrial wastes has been increased more and more in recent decades, motivating studies about a correct sustainable allocation and that also represents advantages for their generators. In this context, are included two companies of cleaning products niche, located in São José do Mipibu/RN, that produces industrial sludge at a sewage treatment plant, and that is the main approach of this research. Given this, it was studied the incorporation potentiality of this sludge as a mineral addition in cement matrix for concrete production due it high capacity of wastes immobilization inside this material, which are subsequently used in the company for making precast articles. Were added different sludge concentrations (5, 10, 15 and 20%) in a common trait (1: 2: 3), and evaluated their techniques and microstructural implications via workability test in fresh state and compressive strength, full porosity and scanning electron microscopy (SEM) in the hardened state. The results demonstrated the feasibility of the process both from a technical and environmental view as economical. All concretes produced with residue showed an increase of workability given the nature of the waste that had surfactants substances capable of adsorbing tiny particles of air into the batter. However, for all concentrations were obtained lower compressive resistances than standard concrete, with a reduction of 39% for samples with 20% of sludge. This are attributed mainly to an increase of porosity in the transition zone of these material, resulting from increased formation of ettringite at the detriment to the formation of other compounds, but which still allows the use of these for the manufacture of concrete articles with non-structural nature, such as precast floor. In addition, the water absorption and void ratio increased slightly for all samples, except the concrete with 20% of waste that has a reduction for the last parameter. Given this context, the recommended maximum level is 20%, constituting a significant proportion and able to allocate sustainably all waste generated in the industry.

Avaliação de sustentabilidade ambiental do sistema de abastecimento de água e esgotamento sanitário de Uberaba - MG

This paper analyses the sustainability under the environmental (ecological) perspective of Water Supply and Sanitary Sewers Systems from Uberaba city, MG. It was accomplished in this analysis, An Environmental Sustainability Assessment of those systems, by the means of specific sustainability indicators proposed for Uberaba, but which may be used for other simi-lar cities. To the characterization of the systems, visitations were made to the main units as well as a documental was elaborated. The definition of the level or stage of the sustainability by the indicators was made based on a literature review, on interviews with the technicians and managers of the systems and based on the characterization and observation of the system reality, being attributed to them the following classification: Non Sustainable, Low Sustaina-bility, Medium Sustainability and High Sustainability. It was verified that the indicators that have lower compatibility to the process of sustainability to the studied systems are those rela-ted to the water physical losses, to the water per capita consumption, to the electricity con-sumption and to the sludge from the water treatment plants disposal untreated into a water body, for the Water Supply System. And those ones related to the attendance with sewage treatment, to the electricity consumption and to the usage of the treated sewage, for the Sani-tary Sewers, all of them classified as Non Sustainable.

Un legado beauvoiriano : El trabajo doméstico en la perspectiva del feminismo materialista de Christine Delphy

En la década del 70, Christine Delphy presenta la perspectiva del feminismo materialista focalizándose en el trabajo doméstico no remunerado. El análisis de Delphy pone de manifiesto el legado del pensamiento de Beauvoir, puesto que retoma las críticas al marxismo clásico, en tanto que dicha teoría no explicita las condiciones de opresión y de explotación de las mujeres. Estos temas y su tratamiento desde el feminismo materialista los situamos en algunos estudios latinoamericanos. Nos referimos a la ocupación en el "servicio" y las tareas domésticas, y a la segregación que se produce entre las mujeres. Por último, ampliamos el marco de la recepción del pensamiento de Beauvoir, en particular la cuestión de las mujeres trabajadoras, a partir del análisis de Marcela Nari

Un legado beauvoiriano : El trabajo doméstico en la perspectiva del feminismo materialista de Christine Delphy

En la década del 70, Christine Delphy presenta la perspectiva del feminismo materialista focalizándose en el trabajo doméstico no remunerado. El análisis de Delphy pone de manifiesto el legado del pensamiento de Beauvoir, puesto que retoma las críticas al marxismo clásico, en tanto que dicha teoría no explicita las condiciones de opresión y de explotación de las mujeres. Estos temas y su tratamiento desde el feminismo materialista los situamos en algunos estudios latinoamericanos. Nos referimos a la ocupación en el "servicio" y las tareas domésticas, y a la segregación que se produce entre las mujeres. Por último, ampliamos el marco de la recepción del pensamiento de Beauvoir, en particular la cuestión de las mujeres trabajadoras, a partir del análisis de Marcela Nari

Un legado beauvoiriano : El trabajo doméstico en la perspectiva del feminismo materialista de Christine Delphy

En la década del 70, Christine Delphy presenta la perspectiva del feminismo materialista focalizándose en el trabajo doméstico no remunerado. El análisis de Delphy pone de manifiesto el legado del pensamiento de Beauvoir, puesto que retoma las críticas al marxismo clásico, en tanto que dicha teoría no explicita las condiciones de opresión y de explotación de las mujeres. Estos temas y su tratamiento desde el feminismo materialista los situamos en algunos estudios latinoamericanos. Nos referimos a la ocupación en el "servicio" y las tareas domésticas, y a la segregación que se produce entre las mujeres. Por último, ampliamos el marco de la recepción del pensamiento de Beauvoir, en particular la cuestión de las mujeres trabajadoras, a partir del análisis de Marcela Nari

Entre lo público y lo privado: empleadores y trabajadoras domésticas frente al Tribunal del Trabajo Doméstico de la ciudad de Buenos Aires

El servicio doméstico ocupa un lugar ambiguo entre los mundos público y privado. Desarrollado en el interior de los hogares de los empleadores, da lugar a relaciones en las que lo laboral y lo afectivo están imbricados. Los juicios laborales entre empleadores y trabajadoras domésticas constituyen un escenario privilegiado para observar el solapamiento de estas dimensiones. Si las demandas de las trabajadoras frente a las instituciones de justicia sitúan esta relación en el mundo público, las respuestas de los empleadores muchas veces buscan resituarlas en el orden privado. Por otra parte, en algunos escenarios, las demandas de las trabajadoras son también expresadas en un lenguaje que remite a lo privado. En este artículo analizamos las lógicas de la confl ictividad judicial establecidas en las estrategias de empleadores y trabajadoras frente al Tribunal del Trabajo Doméstico (TTD), un organismo creado en 1956 para atender los confl ictos individuales que derivan de las relaciones de trabajo de este sector en la ciudad de Buenos Aires. Tomamos dos horizontes temporales caracterizados por cambios en la regulación del trabajo, en general, y del servicio doméstico, en particular: el de los primeros años de funcionamiento del TTD y el cambio de siglo.

Da cozinha ao terreiro em Mutamba da Caieira (RN) : cotidiano, espaço doméstico e sociabilidade

In this work we thought about the social use of the domestic space and, specifically, the space destined to the preparation of food. The kitchen is a creative space of social relationships. There the families exchange daily interaction with the neighbors, in a collective of the space reserved to the making of food. Our empiric research was in the Mutamba da Caieira community, located in the county of Assu (RN). The data was collected through the etnographic method aided by the photographic resources. In the discussion, we delimitated at the house three types of kitchens: one reserved to the family, another kitchen in the terrace and yet another kitchen in the yard. They are kitchens that link amongst themselves with activities and differentiated temporalities. In the daily social exchange, the kitchen imposes itself as a social space through the conditions that it offers for the production of the foods, the circulation of domestic objects, the communication of knowledge around the cookery, operating a group of symbolic and ritual actions combined with appropriate techniques for the transformation of the foods. The study reveals that the domestic chores accomplished amon relatives and friends form webs of intracommunitary relationships in the use of the three kitchens, and that the social network is updated in a singular moment that usually happens in the community, the Game of Pacará

Inmovilización de Arsénico por lodo de mármol y biochar

Estudiamos la capacidad de adsorción de As por parte del lodo de mármol y del biochar de EDAR. El lodo de mármol adsorbe mucho más As que el biochar, aunque de forma más lábil y susceptible de ser asimilada por las plantas.