Abstract The phenomenon of summer mortality in Pacific oysters cultures also occurs in Brazilian crops, with predominance in the adult phase, generating significant losses for local producers. In the search for a technological solution to mitigate its effects, the mechanical vapour compression and hydraulic refrigeration concepts are evaluated as two proposed cooling technologies. The comparative analysis carried out with numeric simulations indicated that the hydraulic cooling system presents disadvantages regarding both the size of the compression column and the energy efficiency, compared to the mechanical vapour compression cycle. By computing only the compression power, a COP value of 6.9 results for the MVCS at TCOND = 29.5 oC and TEVAP = 7.2 oC, while for HRS the COP value is around 3.1 for identical conditions. Results from the analysis contradict former publications, but are consistent with recent findings reported in literature.

RESUMO: A soroprevalência da infecção por lentivírus de pequenos ruminantes (LVPR) foi determinada em amostras de soros sanguíneos de caprinos e ovinos de aptidão cárnea provenientes de abatedouros de dez municípios do estado de Pernambuco, Brasil. O diagnóstico sorológico ocorreu por meio da imunodifusão em gel de agarose (micro-IDGA) com antígenos dos vírus artrite encefalite caprina (CAE)/Maedi-Visna. Entre as 369 amostras de caprinos, 7(1,89%) (0,8-3,9%) eram soropositivas, e, entre as 383 de ovinos, 1 (0,26%) (0,0-1,4%) estava infectada. Os 7 caprinos soropositivos procederam dos abatedouros públicos dos municípios de Gravatá (n=2), Sertânia (n=4) e Timbaúba (n=1), e o ovino soropositivo veio do abatedouro público de Serra Talhada. A soroprevalência da infecção por LVPR em pequenos ruminantes oriundos de abatedouros do estado de Pernambuco, de 1,06% (8/752), é considerada baixa.

ABSTRACT: The prevalence of lentivirus infection of small ruminants (LVPR) was determined in samples of serum from goats and sheep in slaughterhouses from ten districts of Pernambuco State. The serological test was used in agarose gel immunodiffusion (AGID) with antigen caprine arthritis and encephalitis virus (CAE)/Maedi Visna virus. Among the 369 blood serum samples of goats examined, seven (1.89%) (0.8-3.9%) were seropositive, and among the 383 sheep samples examined, just one (0.26%) (0.0-1.4%) was infected. The seven seropositive goats came from public slaughterhouses from Gravatá (n=2), Sertânia (n=4) and Timbaúba (n=1), and the soropositive sheep was from a public slaughterhouse of Serra Talhada. The soroprevalence of LVPR infection in small ruminants from Pernambuco's slaughterhouses, of 1.06% (8/752), is considered low.

A autora aborda a Violência a partir de uma perspectiva ''personalista e fenomenológica'', para que não fique restrita ao seu sentido usual, de violação da integridade física. O artigo toma as filosofias de M. Buber e T. Adorno como plataforma da reflexão, ambas preocupadas em estabelecer uma ''fenomenologia dos sentidos'', e compara suas conseqüências éticas, mostrando como um compreensão ampliada da Violência emerge desse ponto de vista.

The author approaches Violence from a ''personalist and phenomenological'' perspective, so that the issue do not remain exclusevily referred to its usual sense, the violation of physical integrity. The article takes M. Buber and T. Adorno philosophies - both concerned with the construction of a ''phenomenology of sensibilities'' - as a support for its own elaboration, and compares their ethical implications, showing how a enlarged understanding of Violence rises from that point of view.

A questão ética é central nos escritos de Raymundo Faoro, argumenta a autora, para quem a obra de Faoro, desde o seu clássico Os Donos do Poder há 40 anos, exibe de ponta a ponta sua qualidade de educador político.

The ethical question is central in Raymundo Faoro's writings argues the Author, for whom Faoro's work, since his classic Os Donos do Poder forty years ago, shows his quality as a political educator throughout.