"A Utopia do conhecimento químico e da engenharia urbana para a solução dos problemas das cidades do século XIX: o caso de Lisboa"

A modernização urbana do que se verificou nas principais cidades urbanas no século XIX foi marcada por dois fenómenos importantes. Por um lado pela criação de novas estruturas urbanas, e, por outro pelo desenvolvimento industrial. A concentração fabril contribuiu para o aumento da poluição do ar e criou problemas ambientais numa altura em que a higiene e salubridade dos espaços urbanos assumiam maior importância. Para tentar a poluição fabril ao longo do século XIX foi publicada uma serie de legislação. Por outro lado, os médicos, os químicos e os engenheiros tentaram propor soluções que diminuíssem a poluição provocada pelas fábricas ao mesmo tempo que procuraram implementar na cidade as modernas infraestruturas urbanas. O seu conhecimento do progresso da tecnologia permitiu-lhes compreender melhor a poluição produzida pela máquina a vapor ou por alguns processos industriais e propor soluções O objetivo desta comunicação é, tendo Lisboa como espaço de análise, abordar: os problemas ambientais provocados pelo desenvolvimento industrial; a forma como a legislação, engenheiros e cientistas tentaram controlar e contribuir para a resolução dos problemas ambientais.

Medidas de controle ambiental ou de engenharia para o controle da infecção pelo Mycobacterium tuberculosis nos serviços que atendem PVHA

Unidade 3, atividade 3, parte 3 do curso Organização de serviços para o atendimento de pessoas coinfectadas por TB-HIV. A infectologista Rossana Coimbra Brito fala sobre o acolhimento em serviços de saúde que atendem pessoas coinfectadas por TB e HIV. Aborda a importância do controle ambiental nas unidades de saúde, construídas de acordo com as normas vigentes que diminuam o risco de infecção por tuberculose. As medidas de controle ambiental devem visar a redução de partículas infectantes do ambiente, promover a maximização da ventilação natural e utilização de adequada da ventilação mecânica e luzes artificiais.

Medidas de controle ambiental ou de engenharia para o controle da infecção pelo Mycobacterium tuberculosis nos serviços que atendem PVHA

Apresentação em slide da Unidade 3, atividade 3, parte 3 do curso Organização de serviços para o atendimento de pessoas coinfectadas por TB-HIV. A infectologista Rossana Coimbra Brito fala sobre o acolhimento em serviços de saúde que atendem pessoas coinfectadas por TB e HIV. Aborda a importância do controle ambiental nas unidades de saúde, construídas de acordo com as normas vigentes que diminuam o risco de infecção por tuberculose. As medidas de controle ambiental devem visar a redução de partículas infectantes do ambiente, promover a maximização da ventilação natural e utilização de adequada da ventilação mecânica e luzes artificiais.

Medidas de controle ambiental ou de engenharia para o controle da infecção pelo Mycobacterium tuberculosis nos serviços que atendem PVHA

Transcrição da aula da Unidade 3, atividade 3, parte 3 do curso Organização de serviços para o atendimento de pessoas coinfectadas por TB-HIV. A infectologista Rossana Coimbra Brito fala sobre o acolhimento em serviços de saúde que atendem pessoas coinfectadas por TB e HIV. Aborda a importância do controle ambiental nas unidades de saúde, construídas de acordo com as normas vigentes que diminuam o risco de infecção por tuberculose. As medidas de controle ambiental devem visar a redução de partículas infectantes do ambiente, promover a maximização da ventilação natural e utilização de adequada da ventilação mecânica e luzes artificiais.

Medidas de controle ambiental ou de engenharia para o controle da infecção pelo Mycobacterium tuberculosis nos serviços que atendem PVHA

Áudio da Unidade 3, atividade 3, parte 3 do curso Organização de serviços para o atendimento de pessoas coinfectadas por TB-HIV. A infectologista Rossana Coimbra Brito fala sobre o acolhimento em serviços de saúde que atendem pessoas coinfectadas por TB e HIV. Aborda a importância do controle ambiental nas unidades de saúde, construídas de acordo com as normas vigentes que diminuam o risco de infecção por tuberculose. As medidas de controle ambiental devem visar a redução de partículas infectantes do ambiente, promover a maximização da ventilação natural e utilização de adequada da ventilação mecânica e luzes artificiais.

Métodos probabilístico e determinístico para diagnóstico da necessidade de subsolagem de solos agrícolas

This paper presents two techniques to evaluate soil mechanical resistance to penetration as an auxiliary method to help in a decision-making in subsoiling operations. The decision is based on the volume of soil mobilized as a function of the considered critical soil resistance to penetration in each case. The first method, probabilistic, uses statistical techniques to define the volume of soil to be mobilized. The other method, deterministic, determines the percentage of soil to be mobilized and its spatial distribution. Both cases plot the percentage curves of experimental data related to the soil mechanical resistance to penetration equal or larger to the established critical level and the volume of soil to be mobilized as a function of critical level. The deterministic method plots showed the spatial distribution of the data with resistance to penetration equal or large than the critical level. The comparison between mobilized soil curves as a function of critical level using both methods showed that they can be considered equivalent. The deterministic method has the advantage of showing the spatial distribution of the critical points.

Resistência à compressão e remoção de folhas da cana-de-açúcar visando à colheita mecânica

Sugarcane holds an important place in the Brazilian economy. Grate part of the sugarcane harvested still accomplished largely manually. Sugarcane harvesters available in Brazil use the technology to chop the cane into 200 to 300 mm billets to allow on the go cane transferring to transport, contradicting the traditional method of whole stalk sugarcane harvesting system. In order to make whole stalk mechanical harvesting system possible, one of the barriers to be expired is the mechanical removal of the straw. The design of a mechanism that accomplishes this operation depends directly on the knowledge of the mechanical properties of the sugarcane related to its resistance to compression and the forces necessary to remove the leaves from the stalk. Compression tests were conducted using the universal testing machine. For leaves removal test by friction, a special apparatus was designed to allow the registration of the normal and traction force. The sugarcane stalk can resist up to 4.9 MPa. With a normal pressure of 0.8 MPa, which correspond to a friction force of 315 N, it is possible to remove the leaves, independent of its location in the sugarcane stalk.

Condutividade e difusividade térmica do figo (Ficus carica L.) Roxo de Valinhos

The post harvest cooling and/or freezing processes for horticultural products have been carried out with the objective of removing the heat from these products, allowing them a bigger period of conservation. Therefore, the knowledge of the physical properties that involve heat transference in the fig fruit Roxo de Valinhos is useful for calculating projects and systems of food engineering in general, as well as, for using in equations of thermodynamic mathematical models. The values of conductivity and thermal diffusivity of the whole fig fruit-rami index were determined, and from these values it was determined the value of the specific heat. For these determination it was used the transient method of the Line Heat Source. The results shown that the fig fruit has a thermal conductivity of 0.52 W m-1°C, thermal diffusivity of 1.56 x 10-7 m² s-1, pulp density of 815.6 kg m-3 and specific heat of 4.07 kJ kg-1 °C.

Avaliação de danos mecânicos causados em banana Nanicão durante as etapas de beneficiamento, transporte e embalagem

This study had as objective the evaluation of mechanical damages occurred in banana Nanicão during the improvement process, packing and distribution, identifying the probable critical points. The mechanical damages caused by transport, first cleaning; cleanness and sorting; preservation in the packing, transport, and mature were evaluated. The studied packing had been: torito wooden packing (18 kg), wood type ½ box, (13 kg) and cardboard (18 kg). The stage of preservation and transport of the fruits to the distribution center duplicated the light defects and quintupled the serious defects, causing rottenness after the acclimatization. The cardboard packing did not support the piling up and presented deformations, that resulted in the kneading the fruits of the inferior packing, causing a significant increase of the serious defects. The fruits conditioned in the involved packing of plastic bubble had presented an inferior number of serious damages when compared with the others packing, without the plastic.

Caracterização reológica das diferentes fases de extrato de inulina de raízes de chicória, obtidas por abaixamento de temperatura

Inulin is a functional food ingredient, generally employed as sugar or fat substitute in food systems. This ingredient can be found in several vegetal products, including chicory roots. As the solubility of inulin is susceptible to temperature changes, the product suffers a fractionalization resulting in two phases when cooled, originating a precipitated phase, more viscose, and a liquid phase, of lesser viscosity. The study of rheological properties of different phases of inulin extract is important for equipment designing, such as mixer and bombs. In this work, rheological behavior at three different temperatures (25; 40 and 50 ºC) was determined for liquid and precipitated phases of inulin liquid extract, extracted from chicory roots by hot water diffusion and cooled at two different temperatures (8 and -10 ºC), suffering phases separation. The precipitated phase was analyzed in two conditions: pure and with the addition of microencapsulating agents (maltodextrin and hydrolized starch). All of them presented a linear behavior, similar to that of the Plastics of Bingham. Some of them, however, were not an adequate fit to this model.

Índice de previsão de produção de leite para vacas Jersey

In Brazil the adoption of several models of cattle confinement leads to special conditions for management methods in dairy production, which can be improved by the use of technology that assures better herd management. Indexes relating environmental variables to production are applied for the prediction of milk production. The values of temperature and relative humidity, rain index, solar radiation and pasture soil temperature are generally considered potential stress agents for cows. The objective of this research was to develop an index for predicting milk production for high productivity Jersey milking cows lodged in semi confinement in tropical conditions. The experiment considered two treatments: A - the cows waited for 30 minutes prior to milking in a room with a shower associated to a fan; B - the cows did not have access to this room (control). Other than the waiting period, the cows had access to pasture. Differences in the effect of average production were not statistically significant. The analysis for studying the effect of the variables and designing the model led to a statistical model relating the variables milk production and rain index, as well as the maximum soil temperature of pasture, and milk production.

Análise do investimento em climatização para bovinos de leite em sistema de alojamento free-stall

The difficulty in adapting European dairy cows breeds in Brazil affect considerably the milk production sector. Brazilian climatic conditions are not totally favorable and the development of new tecnologies is needed for the animals express their genetic potential, as well as their best feed conversion. An economical analysis of the applied investment in the free-stall climatization equipment in dairy housing, for estimating studies related to profit, possibility of return investment as well as time for this return is necessary. The objective of this research was to evaluate the influence of climatization investment in the milk production process and analyze the economical aspect of this investment. There were used 470 high productive dairy cows with genetic and morphologic homogeneous characteristics, and analyzed in two similar periods. Investment calculations were done using Excell®. The results were satisfactory and the invested capital was proved to return to the producer in a short term, 57 days.

Influência da embalagem de polietileno de baixa densidade e da temperatura na conservação do repolho minimamente processado

This research studied the effect of low density polyethylene packaging and storage temperature on the preservation of fresh-cut (minimally processed) cabbage. The cabbages, previously cooled to a temperature of 10 ºC, were selected, washed, cut in four parts (with the central stalk removed), sanitized, cut in strips, rinsed, put in the centrifuge, weighed and stored in plastic packaging of low density polyethylene (70 µm), and then stored in cold chambers at temperatures of 1 and 10 ºC for 20 days. The following aspects were evaluated: carbon dioxide, oxygen and ethylene in the internal atmosphere of the package as well as, pH, titratable acidity, total soluble solids, vitamin C, loss of fresh mass and the total soluble solids/acidity in the fresh-cut cabbage ratio. The experimental design was entirely casual, with three repetitions. The analysis parameters, except for the vitamin C, loss of fresh mass and ethylene, presented significant variation between the temperatures and days of storage. The cabbage stored at a temperature of 1 ºC presented a shelf life of around 15 days, significantly higher than that stored at 10 ºC. At this temperature, on the 8th day of storage, the product was completely decayed, unfit for commercialization or consumption.

Avaliação da biodegradabilidade anaeróbia de resíduos da bovinocultura e da suinocultura

The biodegradability of animal wastes production was evaluated through a simplified methodology that allowed the verification of the applicability of anaerobic processes. The experiments were performed in bath reactors, with granular sludge of three origins: UASB reactor treating dairy effluent, UASB reactor treating swine effluent and UASB reactor treating effluent of slaughterhouse of poultry. The experiments (1) - dairy effluent and poultry slaughterhouse non-adapted sludge; (2) -swine effluent and poultry slaughterhouse non-adapted sludge; (3) - dairy effluent and poultry slaughterhouse adapted sludge; (4) - swine effluent and poultry slaughterhouse adapted sludge; (5) - dairy effluent and dairy sludge, and (6) - swine effluent and swine sludge were performed in Incubator Shaker, at a temperature of 35 °C, under agitation at a 150 rpm, for 5 minutes, every 1 hour. A substrat:biomass relationship of 0.5 was used. Kinetic models of Monod, Zero Order, First and Second Order were tested and it was verified that the First Order model provided the best adjustment. The apparent First Order kinetic parameter (k1) was estimated for the experiments 1; 2; 3; 4; 5, and 6, as 2.51 x 10-2; 2.49 x 10-2; 1.90 x 10-2; 3.09 x 10-2; 2.54 x 10-2; 4.09 x 10-2 h-1, respectively.

Avaliação econômica da elaboração de banana-passa proveniente de cultivo orgânico e convencional

This work reports an economic evaluation of the dried banana production from an agroindustry located in Guaraqueçaba - PR State, Brazil. The conventional and the organic banana processings were evaluated by comparing the economic viability pointers. The dried organic banana is exported to the Europe and the dried conventional banana is commercialized in the region of Curitiba - PR. Both processings presented positive economic viability, however the dried organic banana presented better indices (TIR 94%, VPL R$ 486,009.39 and benefit cost relation of 2.11) than the conventional dried banana (TIR 14%, VPL R$ 34,668.00 and benefit cost relation of 1.17). The dried organic banana presented a cost of production of R$ 3.64, being 50.1% relative to the expense with insumos and 27% with labour. The dried conventional banana presented a cost of R$ 3.21, being 45.3% for insumos and 31.2% for labour.