955 resultados para Refrigeration and refrigerating machinery.


Relevância:

100.00% 100.00%

Publicador:

Resumo:

This study focuses on two issues, the process of subjectivity production and the exercise of friendship alongside political militancy in the Landless Rural Workers Movement (MST). Friendship is here understood as the social practice with the potential to question certain modes of socially formed relationships as well as their becoming a political exercise. The political militancy phenomenon is problematized based on the subjectivity production perspective. The objective of the study was to construct acartography of the subjectivity production processes with political activists of the MST and to highlight the points in which the exercise of friendship enhances the appearance of singularity in the context of this militancy. The cartography is a research method that permits the identification of macro political, as well as micro political forces that interfere in a psychosocial context, such as the MST. The participants were members of an MST group that participated in a Pedagogy course coordinated by the Department of Education of the Universidade Federal do Rio Grande do Norte. The other participants were militants involved in political formation activities at the social base, as well as in the other levels of the MST in the states of Rio Grande do Norte, Paraíba, Pernambuco, Ceará, Minas Gerais and Paraná. The results are linked to the oscillate incorporation of the landless identity model that occurs as a group of disciplinary strategies are put in practice in the political formation activities with militants, as well as the ways of model evation are formed. This occurs to the extent that new demands and forms of invested desires beyond the land object are incorporated in the MST. Such singular processes happen in three areas of the political exercise of friendship articulation: the masses, where there is a possibility for the MST to construct a new social collectivity; gender relations, where the socially destined space for women is redimensionized and; sexual diversity, which provokes the MST to follow its potential in questioning the actual hegemonic living modes. It is therefore considered that the MST has a great opportunity to become an important mediator of contemporary social and political struggles

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Utilizou-se o músculo Iliotibialis lateralis da sobrecoxa da ema (Rhea americana) para a realização das análises de estabilidade da carne sob armazenamento em refrigeração e congelamento. Na avaliação da carga microbiológica da carne foram realizadas análises de Coliformes Totais, Coliformes Fecais (Escherichia coli) e psicrotróficos. No período de zero a 12 dias de refrigeração determinou-se o pH da carne e a degradação protéica através da análise de Nitrogênio Volátil Total (NVT). Durante o congelamento (período de 60 dias) avaliou-se o pH e a oxidação lipídica pela análise do número de TBA da carne armazenada. As amostras sob refrigeração e congelamento mostraram-se adequadas ao consumo, não apresentando contaminação microbiológica durante todo o período de estocagem. Os valores de Nitrogênio Volátil Total (NVT) da carne sob refrigeração tiveram uma evolução insignificante (4%) entre o tempo zero e o 12º dia de estocagem. Durante o congelamento ocorreu um aumento significativo do número de TBA nas amostras, com variações de 1,5-2,5 mg de SRATB/1.000 g amostra. Os valores de pH da carne de ema armazenada sob refrigeração e congelamento mantiveram-se praticamente estáveis em torno de 5,8.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Laccases are glycoprotein polyphenol oxidases which are involved in fungal pathogenicity and they are also useful for biotechnological applications. The ligninolytic ascomycete, Botryosphaeria rhodina, has been studied as producer of exopolysaccharide and PPO-I and PPO-II laccases induced by veratryl alcohol. However, as the induced laccases have not been isolated, the aim of this study was to purify the enzyme and to identify the carbohydrates constituents of the glycosidic moiety. The fungus was cultivated on broth Vogel, 1% glucose and 30.4mM veratryl alcohol during 4.5 days at 28°C/180 rpm. The extracellular fluid showed high carbohydrate concentration and the stability of PPO-I laccase under conditions of refrigeration and freezing at 4°C-18°C over 40 days. The purification was developed by ultrafiltration using a NMWL 100 and 30 kDa membrane, gelfiltration on Sephadex G-100, and ion-exchange chromatography on DEAE-cellulose. The purified laccase was identified as a glycoprotein, weight molecular 113 kDa, consisting of 40% protein and 60% carbohydrate identified by HPAEC-PAD as fucose, galactose, mannose, glucose and glucosamine.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

An experimental apparatus containing a domestic refrigerator coupled to a vertical hot water storage tank was used for energy recovery. The original condenser of the refrigerator was maintained, but modified with a concentric tubes heat exchanger with countercurrent water and refrigerating gas flows. The coefficient of performance for the heat pump is calculated by the ratio of energy in the heat storage and the electric power consumed by the domestic refrigerator compressor. The results show that the increasing of hydrostatic pressure in the storage tank increases the water flow rate and the coefficient of performance. The proposed device also reduces the heat dissipation to the surroundings. This is more important in small confinements found in low-cost houses.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Pós-graduação em Agronomia (Horticultura) - FCA

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Pós-graduação em Microbiologia Agropecuária - FCAV

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Pós-graduação em Geografia - IGCE