Search PubMed⌕ Search

Biomedical subjects

I M Robertson

Publications and source records attributed to I M Robertson.

11 recordsLinked to original sources
PubMed2005

In situ TEM observation of the nucleation and growth of silver oxide nanoparticles.

The nucleation, growth, and coalescence of silver oxide nanoparticles have been investigated dynamically and at high spatial resolution by using the electron beam of a transmission electron microscope to stimulate and to observe the processes. Under the assumption the particles are hemispherical, the growth rate was found to be proportional to the square root of the electron irradiation time. This result suggests that the rate-limiting step is the attachment of atoms to the nanoparticles. Growth of the nanoparticles occurred by the addition of columns of atoms on {111} planes. Particle impingement resulted in interpenetration of the particles and, ultimately, the formation of a grain boundary.

Journal Article↗
PubMed1999

Anetoderma of prematurity in association with electrocardiographic electrodes.

Anetoderma in premature infants is an uncommon lesion that may be associated with the use of various types of monitoring leads. In 2 infants multiple papules of anetoderma occurred on the forehead in association with the use of gel electrocardiographic electrodes. It is postulated that the cause of these papules was a local hypoxemia caused by pressure from the electrodes. Growth-restricted infants may be particularly predisposed to iatrogenic anetoderma.

Biopsy, Needle↗
PubMed1998

Controlled environment transmission electron microscopy.

The design of a controlled environment electron microscope is described and examples are presented to demonstrate the information that can be obtained by studying gas-solid interactions in real time and at high spatial resolution.

Environment, Controlled↗
PubMed1998

Benign hypergammaglobulinaemic purpura of Waldenström associated with lymphoid interstitial pneumonitis.

A 31-year-old female is described who developed benign hypergammaglobulinaemic purpura and lymphoid interstitial pneumonitis concomitantly. High titre anti-nuclear antibodies were also noted. Several years previously, the patient had developed myasthenia gravis and multiple sclerosis. The present case is an example of multiple medical disorders characterized by immune dysregulation and represents the first reported associated of hypergammaglobulinaemic purpura with lymphoid interstitial pneumonitis.

Adult↗
PubMed1996

Acquired ichthyosis in bone marrow transplant recipients.

BACKGROUND: Acquired ichthyosis (AI) has been described in a variety of clinical situations. We have observed cases of ichthyosis in bone marrow transplant recipients. OBJECTIVE: Our purpose was to characterize these changes clinically and histologically and to compare them with other cases of acquired ichthyosis. METHODS: Skin biopsy specimens were taken before transplantation and from affected areas after transplantation. RESULTS: AI was observed in four patients who had received a bone marrow transplant for leukemia. None of the patients had a previous personal or family history of ichthyosis. In all patients graft-versus-host disease developed after transplantation. The eruption clinically and histologically most closely resembled ichthyosis vulgaris. The ichthyotic changes appeared to be unrelated to specific drug therapy. CONCLUSION: AI is a previously unreported cutaneous complication of bone marrow transplantation. It may be related to graft-versus-host disease in these patients.

Acute Disease↗
PubMed1994

Pityriasis rosea-like eruption after bone marrow transplantation.

Bone marrow transplantation is associated with numerous cutaneous complications that may be related to the underlying (preexisting) disease, to pretransplant conditioning, to immunosuppression, to concomitant medication, or to graft-versus-host reaction. We describe four bone marrow transplant recipients with the clinical and histologic features of pityriasis rosea, a hitherto unreported association.

Adult↗
PubMed1986

Scottish-English comparisons: a cautionary note on the census.

"This paper draws attention to the variation in Census Enumeration District size between Scotland and England and the implications for country-wide research. It also reflects on the varying definition of a room between the countries and over time."

Censuses↗