Bengt Ljungqvist

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The content of amino acids and other nitrogenous substances was determined in milk samples from Ethiopian and Swedish mothers. The Ethiopian mothers were divided into two groups, one with children having low weight for age and one with children having standard weight for age. All children were in the age range 2 to 5 months, and there were eight in each(More)
It is desirable to maintain a low bacterial count in the operating room air to prevent surgical site infection. This can be achieved by ventilation or by all staff in the operating room wearing clothes made from low-permeable material (i.e. clean air suits). We investigated whether there was a difference in protective efficacy between a single-use clothing(More)
The plasma amino acid response to single test meals in young adults was used to determine the amount of physiologically available lysine in heat-treated milk samples. The plasma amino acid responses were evaluated as PAA ratios according to a modified calculation procedure based on the method proposed by Longenecker and Hause. The amount of available lysine(More)
Nitrous oxide is used in dentistry for sedation and analgesia. Chronic occupational exposure of dental personnel to trace concentrations of nitrous oxide has been reported as a potential health hazard. A new application of the thermocamera technique was used to study the dispersion of nitrous oxide during dental analgesia. Four breathing systems with(More)
This paper presents results from a comparative study of different impaction air samplers under simulated operational conditions in a controlled environment. Furthermore measurements have been performed in a body-box during evaluation of clean-room clothing and in a day care center. Microbial monitoring of controlled environments can be performed in several(More)
Today, clothing and clothing systems for cleanrooms are mainly tested with regard to material properties such as particle generation, particle filtration, and resistance to wear. The dispersal chamber or "body-box" has been used for studying the protective efficacy of clothing systems in use, for example by Hoborn in 1981 (1) and Whyte and Bailey in 1985. A(More)
UNLABELLED BACKGROUND To prevent surgical site infection it is desirable to keep bacterial counts low in the operating room air during orthopaedic surgery, especially prosthetic surgery. As the air-borne bacteria are mainly derived from the skin flora of the personnel present in the operating room a reduction could be achieved by using a clothing system(More)
The purpose of this presentation is to describe the theoretical relations for the dispersal of airborne contaminants and to illustrate the validity of these equations occurring during factual situations, where a number of observations on air movements in open unidirectional air flow units supplied with HEPA-filters are described. In factual situations the(More)