In this study we evaluated the diffusion of nitrous oxide in a few operating rooms, using spatial data modelling techniques, in order to assess hospital staff exposure and to promote risk management. Indoor air sampling was carried out, during routine operating activity, by means of transportable infrared spectrometer, with geostatistical techniques. We detected high average concentrations of nitrous oxide (from 8 ppm to 445 ppm, with a peak of 1345 ppm).

We try to compare an environment in different types of hospitals. The University Hospital iD. Prague is located in the centre of the town in historical buildings. Homolka Hospital in Prague is one of the newest monoblock hospitals, well equipped; smaller but specialised (e.g. Leksell Gamma.Knife). We compared tbe concentrations of anaesthetic gases and temperature in operating theatres with or without air-condition. The effect of ventilation systems was confirmed, when the systems were good operated.

The objective of this paper was to verify that problem of indoor air pollution is present in primary school in Yugoslavia. Indoor air pollutant levels of sulfur-dioxide, soot, nitrogen dioxide, carbon monoxide and formaldehyde, and air-microflora was determined in different places of school environment. The average indoor level of sulphur dioxide and soot in primary schools were comparatively high. Determined average levels of carbon monoxide were from 13 .2 - 31. 8 mg/m3, levels of nitrogen dioxide were 20 - 62 μg/m3 and levels of formaldehyde: 0.01 - 0.83 μg/m3.

This case study conducted in a new air-conditioned building in Singapore was aimed at identifying, and assessing indoor levels of VOCs using a GC-MS method. The study identified 80 different compounds with Toluene appearing in all locations. Most VOCs detected were from building materials, adhesives, varnishes, sealing compounds, polyester carpets reflecting the age of the building and vehicular emissions reflecting the poor positioning of the air intake.

Measurements of VOC, formaldehyde, temperature, relative humidity, ventilation and inspections of humidity related problems were made in 178 randomly selected Swedish dwellings. More than one hundred single VOCs was identified with a mean concentration less than 25 μg/m3. The concentration of 80% of the identified VO Cs were less than 10 μg/m3. One-family houses had a higher concentration of VOCs than multi family houses.

The aim of the study was to follow changes in allergens and airborne particles in the indoor environment during the first year in a newly started school. The building is from the sixties and was refurbished during the summer to be made suitable as a school. New internal walls and some new flooring were installed, and walls and ceilings were redecorated. Most of the furniture, textiles and lamps are new. Samples for allergen determination were collected by sampling settled dust with a vacuum cleaner. Airborne allergens were collected by a newly developed method involving an ionisator.

The association of moisture damages of school buildings with microbial indoor air quality and health status of school children was studied. To determine the association the school buildings (N=32) were divided into the moisture damaged (index) and non-damaged (reference) schools according to technical inspection data. Children's health surveys were made by questionnaires. Microbes were determined from indoor air of school buildings using a six-stage impactor. Children in the index schools reported more respiratory symptoms compared to children in the reference schools.

Repeated measurements were taken in a printers' office where one case of humidifier lung disease had occurred. In water supplies of the office's air conditioning systems, the number of moulds was mainly below 50 colony-forming units (CFU)/mL, the quantity of anaerobic bacteria mostly below 10,000 CFU/mL. Twenty-nine out of the 120 participating employees complained of symptoms such as dyspnea, cough, malaise whose majority was not associated with the workplace. Twenty-eight had IgG antibodies to humidifier antigens prepared from water supplies of the air conditioning systems.