Blisters

About: Blisters is a research topic. Over the lifetime, 980 publications have been published within this topic receiving 16229 citations.

Blisters and erosions in a neonate.

Abstract: A newborn male infant was transferred to the neonatal intensive care unit for widespread vesicles and erosions evident at birth, following a spontaneous vaginal delivery complicated by fetal meconium exposure. The mother, initially unavailable for examination because she remained at the facility where she had given birth, reported via telephone that she was healthy except for a urinary tract infection for which she had taken a 7-day course of nitrofurantoin monohydrate approximately 3 to 4 weeks before delivery. She denied a history of herpesvirus infection, blistering disorder, or autoimmune disease. On physical examination, the neonate exhibited extensive erosions rimmed by purulent vesicles involving the groin, neck, scalp, fingers, and left side of the upper chest (Figure, A and B). Mucous membranes were spared. Biopsy specimens were obtained, with results as shown in the Figure, C and D. A

Topographic/structure changes of implanted Si3N4

Abstract: A series of investigations were carried out to evaluate the topographic and structural effects of ion implantation on monolithic Si 3 N 4 ceramic surfaces. Implantations were performed with N 2 , Ne, or Ar in the fluence range of 2.0 × 10 16 to 4 × 10 17 particles/cm 2 and implant voltages of 125 to 200 keV, depending on the mass of the implanted species. Single crystal Si and SiC were also examined for comparative purposes. Noble gases produced blisters on Si 3 N 4 and significant increases in surface expansion. TEM examination of the Si 3 N 4 blister shell showed a distribution of small bubbles, ranging in size from 5 to 300 nm, depending upon the type of Si 3 N 4 , and a transformation of the original crystalline structure into an amorphous phase. Analysis of the blister shell, using electron energy loss spectrometry (EELS) and energy dispersive x-ray spectrometry (EDXS) showed that a significant quantity of the implanted Ar was still present in the blister (skin).

Energy-filtered image of surface blisters by grazing incidence electron microscopy

Abstract: We have examined fine structure of surface blisters formed by D + or He + irradiation onto mono-crystalline silicon by grazing incidence electron microscopy (GIEM), using an energy-filtering transmission electron microscope (EFTEM). Mapping of the projected thickness clearly visualized the structural difference of the blister skins formed by D + and He + irradiation respectively. A He distribution image of the He-blister was also successfully obtained.