A natureza do ciúme

RESUMO:O presente estudo tem como objectivo a compreensão do ciúme como fenómeno e sua génese, e verificar como cada um dos sexos se expressa na vivência do ciúme e a consequente relevância para cada um deles. Foi utilizada uma amostra de 210 jovens adultos de ambos os sexos, com idades compreendidas entre os 17 e os 35 anos, que preencheram um protocolo de investigação que incluía um questionário de dados demográficos e historial dos relacionamentos amorosos e sexuais, um de reacções emocionais à infidelidade do parceiro, a Chornic Jealousy Scale (White, 1981), a Multidimensional Jealousu Scale (Pfeiffer & Wong, 1989), Reactive and Suspicious Jealousy Scale (Rydell & Bringle, 2003). Foram encontradas diferenças entre géneros no que respeita às reacções emocionais face a uma potencial infidelidade, sendo que os homens consideraram pior uma infidelidade sexual e as mulheres uma infidelidade emocional. Foram ainda encontradas diferenças entre os sexos na forma como vivenciavam o ciúme, sendo que as mulheres revelaram ser mais ciumentas em todas as escalas de ciúme, com a excepção do ciúme reactivo, onde comparativamente aos homens se verificou inferior. ABSTRACT: The goal of the present study is to understand jealousy as a phenomenon and its origins, and verify how each gender expresses it and the consequent relevance to both of them. For this purpose, we considered a sample of 210 young adults of both sexes, aged between 17 and 35 years, who completed a research protocol which included a questionnaire of demographic data and a report of love and sexual relationships, a scale of emotional reactions to partners infidelity; the Jealousy Chronic Scale (White, 1981), the Multidimensional Scale Jealousy (Pfeiffer & Wong, 1989), Reactive and Suspicious Jealousy Scale (Rydell & Bringle, 2003). Gender differences were found in what concerns emotional reaction to a potential infidelity: men considered sexual infidelity as being the worst, whereas women pointed out emotional infidelity. Differences were also found in the way they experienced jealousy: women proved to be more jealous on all scales, with the exception of reactive jealousy.

Morphologic study of the efferent ductules of the pigeon (Columba livia)

The efferent ductules of the pigeon are localized in the epididymal region and are topographically divided into proximal and distal, both portions being lined with stereociliated pseudostratified epithelium. Transmission electron microscopy shows five distinct cell types

Estudo das relações anatômicas e suas variações entre o nervo ciático e o músculo piriforme

CONTEXTO: A síndrome do músculo piriforme pode ter como causa a passagem anormal do nervo ciático ou de uma de suas partes pelo ventre do músculo piriforme. OBJETIVO: Analisar as relações anatômicas e métricas entre o músculo piriforme e o nervo ciático, contribuindo com o conhecimento anátomo-clínico da região glútea. MÉTODO: Foram utilizados 20 cadáveres adultos de ambos os sexos. O nervo ciático e o músculo piriforme foram dissecados, medidos e fotodocumentados. RESULTADOS: Observou-se que 85% das 40 regiões glúteas apresentaram o nervo como tronco único, passando pela borda inferior do músculo piriforme, e 15% mostraram uma variação bilateral, caracterizada pela passagem do nervo fibular comum através do músculo piriforme. Os dados obtidos não revelaram diferenças estatisticamente significantes.

Immunosuppression in paracoccidioidomycosis: T cell hyporesponsiveness to two Paracoccidioides brasiliensis glycoproteins that elicit strong humoral immune response

To assess human cellular immune response to paracoccidioidomycosis (PCM), lymphocyte proliferative responses to purified antigens from Paracoccidioides brasiliensis were determined in healthy persons previously infected by the fungus (positive donors), in healthy noninfected persons (controls), and in PCM patients. Affinity-purified gp70 and gp43, the two major antigens in humoral immune responses, were used, Both induced lymphocyte proliferation (gp43 species-specific) in positive donors but not in controls; healthy persons previously infected by Histoplasma capsulatum reacted to gp70 and not to gp43, A similar cross-reactivity in antibody response to gp70 was previously reported; however, antibody response to gp43 has been considered specific, Lymphocytes from PCM patients, who, unlike positive donors, have high levels of anti-gp43 and anti-gp70 antibodies, proliferated poorly with gp70 and gp43 but better with other stimuli, This dichotomy between humoral and cellular antigen-specific responses suggests a Th2 immune response in PCM, which may be related to failure to control the infection.

Optical properties and energy transfer processes in (Tm3+, Nd3+) doped tungstate fluorophosphate glass

We investigate the linear optical properties and energy transfer processes in tungstate fluorophosphate glass doped with thulium (Tm3+) and neodymium (Nd3+) ions. The linear absorption spectra from 370 to 3000 nm were obtained. Transitions probabilities, radiative lifetimes, and transition branching ratios were determined using the Judd-Ofelt [Phys. Rev. 127, 750 (1962); J. Chem. Phys. 37, 511 (1962)] theory. Frequency up-conversion to the blue region and fluorescence in the infrared were observed upon pulsed excitation in the range of 630-700 nm. The excitation spectra of the luminescence were obtained to understand the origin of the signals. The temporal decay of the fluorescence was measured for different concentrations of the doping ions. Energy transfer rates among the Tm3+ and Nd3+ ions were also determined.

POLYSEROSITIS IN A PATIENT WITH ACUTE PARACOCCIDIOIDOMYCOSIS AND HEPATOSPLENIC SCHISTOSOMIASIS

A severe case of juvenile paracoccidioidomycosis (PCM), manifested as cholestatic jaundice, lymphnode enlargement and an unusual form of polyserositis, associated with portal hypertension secondary to schistosomiasis, as well as bacteremias caused by E. coli and S. aureus and post-transfusional hepatitis C is reported. Temporary unresponsiveness of in vivo and in vitro cellular immune responses to P. brasiliensis were registered. The authors discuss the possible interference of either agent in the host immune response, thus explaining the severity of PCM in the present case.