ABSTRACT
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ABSTRACT
There is sparse direct experimental evidence that atomic nuclei can exhibit stable "pear" shapes arising from strong octupole correlations. In order to investigate the nature of octupole collectivity in radium isotopes, electric octupole (E3) matrix elements have been determined for transitions in ^{222,228}Ra nuclei using the method of sub-barrier, multistep Coulomb excitation. Beams of the radioactive radium isotopes were provided by the HIE-ISOLDE facility at CERN. The observed pattern of E3 matrix elements for different nuclear transitions is explained by describing ^{222}Ra as pear shaped with stable octupole deformation, while ^{228}Ra behaves like an octupole vibrator.
ABSTRACT
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the Standard Model of particle physics. Isotopes of both radon and radium have been identified as candidates for such measurements. Here, we observed the low-lying quantum states in 224Rn and 226Rn by accelerating beams of these radioactive nuclei. We show that radon isotopes undergo octupole vibrations but do not possess static pear-shapes in their ground states. We conclude that radon atoms provide less favourable conditions for the enhancement of a measurable atomic electric-dipole moment.
ABSTRACT
ABSTRACT The objective of the present study was to report the concomitance of cysticercosis and acquired immunodeficiency syndrome (Aids) in autopsied patients at a school hospital in Minas Gerais State, Brazil. Cysticercosis can be seen in patients with Aids, who may or may not present symptoms according to their immunological state. Therefore, it is necessary that cysticercosis be included in the list of opportunistic infections, and that more studies be carried out for a better understanding of this coinfection.
RESUMEN El objetivo del presente trabajo es reportar la concomitancia entre cisticercosis y el síndrome de inmunodeficiencia adquirida (Sida) en pacientes sometidos a autopsia en un hospital universitario de Minas Gerais, Brasil. Es posible asociar cisticercosis y pacientes con Sida, pero ellos pueden presentar síntomas o no, según su situación inmunitaria. Por eso, se recomienda incluir la cisticercosis en la lista de infecciones oportunistas y realizar más estudios para mejorar la comprensión de esa coinfección.
RESUMO O objetivo do presente trabalho foi relatar a concomitância entre cisticercose e síndrome da imunodeficiência adquirida (Aids) em pacientes autopsiados em um hospital escola de Minas Gerais, Brasil. É possível associar cisticercose e pacientes com Aids, mas eles podem ou não apresentar os sintomas, dependendo do seu estado imunológico. Por isso, é necessário que a cisticercose entre no rol de infecções oportunistas e que mais estudos sejam feitos para melhor compreensão dessa coinfecção.
Subject(s)
Muscle Hypotonia/pathology , Myopathies, Nemaline/pathology , Respiratory Paralysis/pathology , Adult , Fatal Outcome , Female , Humans , Infant, Newborn , Male , Muscle Hypotonia/congenital , Muscle Hypotonia/etiology , Muscle, Skeletal/ultrastructure , Muscular Atrophy/congenital , Muscular Atrophy/etiology , Muscular Atrophy/pathology , Pregnancy , Respiratory Paralysis/congenital , Respiratory Paralysis/etiologyABSTRACT
The summertime haze transported from the Gulf Coast northward in maritime tropical air masses is partially formed from emissions in the midwestern and northeastern United States. Several cases are documented in which sulfate particulates, formed from emissions in the Midwest and Northeast, traveled to the Gulf of Mexico and, in some cases, returned to their source regions.
