Consulta: subjectFacets:"Breathing mixtures"
Registros recuperados: 2
Data/hora: 11/06/2024 00:50:55

Etude experimentale preliminaire sur les echanges gazeux chez Pinna nobilis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vicente, N; Riva, A; Butler, A.
Breathing exchanges of Pinna nobilis L. are studied in situ and in the laboratory with two methods. First method consist in introducing samples of Pinna under a 40l plexiglass bell equipped with haps. The bell is positionned by diving. The consumption of oxygen is observed with water samples and the oxygen concentration is measured with an electronic oxymeter. Experiments which are carried out during nycthemeral cycles are reproduced in the laboratory with the same type of bell. A second method carry into effect an apparatus more sophisticated, who put into circulation a current of water in an airtight thermostated cellule, where a specimen of young Pinna is introduced. This sample is gradually adaptated to the conditions of the medium. Breathing...
Tipo: Text
Palavras-chave: Pinna nobilis; Bivalvia; Temperature; Metabolism; Oxygen consumption; Experimental research; Breathing mixtures; Marine molluscs.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1761.pdf

Intelligibilite de la parole en milieu subaquatique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Casanova, M; Avon, M; Marchal, A; Gavarry, P.
Gas mixture and pressure modify the spectral characteristics of diver's speech. Additionally, constraints imposed on jaw movements by wearing a facial mask affect the speech production process. The auditory feedback loop is equally concerned. Furthermore, underwater adverse working conditions are characterised by noise from different sources. As a result, divers' speech is poorly intelligible and communications between divers and surface control need to be enhanced. To this end, "voice unscramblers" are being used. However, the technological state of commercially available equipment is dated and the quality of speech remains insufficient. To help with the design, testing and qualification (NORM) of new communication devices, a bilingual (French-English)...
Tipo: Text
Palavras-chave: High pressure effects; Hyperbaric; Divers; Diving physiology; Breathing mixtures.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/acte-1148.pdf