Gravidez e radiologia: fim do mito

Dissertação para obtenção do grau de Mestre no Instituto Superior de Ciências da Saúde Egas Moniz

Description of recent sediments of the East African continental margin

Recent sediments off East Africa coast show 5 fades, parallel the coast: biogene carbonate sand, olivgrey mud, foraminiferal sand, globigerine ooze, and deep sea clay. These sediments decrease progressively in grain size, carbonate content and shell debris away from the coast. They differ in the primary and biogenetic structures, degree of bioturbation, lebensspuren and content of fecal pellets.

Sample information and classification of lower Miocene gravity-flow types of sediment core CRP-1 (Table 1)

Nineteen samples of the Cape Roberts-1 drillcore were taken from Miocene- age deposits, from 90.25 - 146.50 metres below seafloor (mbsf) for thin section and laser grain-size analysis. Using the grain-size distribution, detailed core logging, X-radiography and thin-section analysis of microstructures, coupled with a statistical grouping of the grain-size data, three main styles of gravity-flow sedimentation were revealed. Thin (centimetre-scale) muddy debris-flow deposits are the most common and are possibly tirggered by debris rain-out from sea-ice These deposits are characterised by very poorly sorted, faintly laminated muddy sandstones with coarse granules toward their base. Contacts are gradational to sharp. Variations on this style of mass-wasting deposit are rhythmically stacked sequences of pebbly-coarse sandstones representing successive thin debris-flow events. These suggest very high sedimentation rates on an unstable slope in a shallow-water proximal glacimarine environment. Sandy-silty turbidites appear more common in the lower sections of the core, below approximately 141.00 mbsf, although they occur occasionally with the debris flow deposits The turbidites are characterised by inversely to normally graded, well-laminated siltstones with occasional lonestones, and represent a more distal shallow-water glacimarine environment.

Comparison of radiation exposures from panoramic dental X-ray units /

"Dec. 1976."

Photographic dosimetry of X- and gamma rays.

Bibliography: p. 28.

Dental exposure normalization technique : "DENT" instruction manual /

Item 498-B-1

Workshop manual for quality control of scintillation cameras in nuclear medicine /

Mode of access: Internet.

Le Journal de physique et le radium.

Issues for 1920- include section: Exposé et mises au point bibliographique (called Revue bibliographique, 1920-1947; called Mises au point bibliographiques, 1948-1949)

Comptes rendus.

t. 1. Sciences physiques.--t. 2. Sciences biologiques. Radiologie médicale.

The normal encephalogram,

Bibliography: p. [209]-218.

Journal de physique théorique et appliquée.

Not published: 1915; 1918; Aug.-Dec., 1919.

Radiology laboratory manual for veterinarians ...

Mode of access: Internet.

Fundamentals of X-ray; physics and technique.

Loose-leaf; reproduced from type-written copy.

Annual report /

Description based on: 1983-84; title from cover.

Biennial report /

Title from cover.