RESUMO
Fractal aggregates of silver nanoparticles are studied experimentally using atomic force microscopy and photon scanning tunnelling microscopy. Large changes in the near-field optical response of fractal aggregates are observed after the irradiation of samples with nanosecond laser pulses. The threshold energy density for photomodification using a 532 nm laser is measured to be 9 mJ cm(-2). It is shown that photomodification-induced changes in the local optical response can be two orders of magnitude larger than changes in far-field absorption.
RESUMO
Morgagni hernia is a congenital diaphragmatic hernia that occurs secondary to potential anterior medial defects in the diaphragm. Although the hernia usually is diagnosed incidentally, appearing as a mass on chest radiograph, symptoms of bowel obstruction may occur. Surgical repair is required in all cases and may be performed with either the abdominal or transthoracic approach.
Assuntos
Hérnias Diafragmáticas Congênitas , Dor Abdominal/etiologia , Adulto , Hérnia Diafragmática/complicações , Hérnia Diafragmática/diagnóstico por imagem , Hérnia Diafragmática/cirurgia , Humanos , Obstrução Intestinal/etiologia , Masculino , Radiografia TorácicaRESUMO
Acts of violence within a statewide prison population were reviewed to determine the incidence, types of injuries, surgical procedures required, persons involved in the trauma, and weapons used to inflict the injuries. The objective was to identify trends to aid in developing methods of prevention. Over a 3-year period, 1600 prisoners from the state of Tennessee were hospitalized at our institution. The majority were from the maximum security unit. There were 133 episodes of trauma. Our study focused on the first admission of 94 inmates. Fourteen (15%) of the injuries were self-inflicted, including seven self-inflicted penetrating wounds. Nineteen different weapons were used to inflict trauma. Prison cafeteria utensils and workshop utility and office devices may need to be redesigned because these items are frequently used in acts of violence. Victims subjected to repeated episodes of violence should be relocated. Lastly, self-mutilators may need to be transferred to an institution for the mentally impaired for their own protection.
