http://hdl.handle.net/10029/4904 Thu, 23 May 2013 09:30:52 GMT 2013-05-23T09:30:52Z http://hdl.handle.net/10029/14390 Title: Legionellapreventie: betere naleving Waterleidingwet nodig Authors: Versteegh, A.; Brandsema, P.; Aa, M. van der; Dik, H. Abstract: Ongeveer 20 procent van de zorginstellingen en zwembaden heeft in 2005 te maken gehad met een legionellabesmetting in de leidingwaterinstallatie. Dit gold ook voor 5 procent van de hotels en campings. Vooral in zorginstellingen kan Legionella in de waterleidingen gevaarlijk zijn, omdat de mensen hier vaak een zwakkere gezondheid hebben. Circa 90% van de instellingen leeft niet alle wettelijk voorgeschreven preventiemaatregelen volledig na. Bij hercontrole is echter een groot deel van de problemen opgelost. Dit toont de effectiviteit en het belang van de controles: eenmaal op de hoogte van de risico’s zijn de eigenaren meestal bereid de nodige aanpassingen te doen. Het aantal collectieve leidingwaterinstallaties met Legionella nam tussen 2000 en 2006 niet duidelijk af. Een betere naleving van de legionellapreventie regelgeving en installatievoorschriften leidt naar verwachting wél tot minder Legionella in leidingwaterinstallaties. Tussen 2000 en 2006 steeg het aantal gemelde patiënten met legionellose. Een betrouwbare schatting van het aantal patiënten dat gerelateerd is aan een collectieve leidingwaterinstallatie als besmettingsbron is echter niet mogelijk. Thu, 01 Nov 2007 13:54:44 GMT http://hdl.handle.net/10029/14390 2007-11-01T13:54:44Z http://hdl.handle.net/10029/12002 Title: Functional foods: the case for closer evaluation. Authors: Jong, Nynke de; Klungel, Olaf H; Verhagen, Hans; Wolfs, Marion C J; Ocké, Marga C; Leufkens, Hubert G M Abstract: Current regulations focus on the mandatory safety evaluation of functional foods before they come to market, but Nynke de Jong and colleagues argue that the effects of such foods should also be evaluated after they have been launched Sat, 19 May 2007 00:00:00 GMT http://hdl.handle.net/10029/12002 2007-05-19T00:00:00Z http://hdl.handle.net/10029/11409 Title: Classification of mineral water types and comparison with drinking water standards Authors: Aa, NGFM van der Abstract: In a study of 291 mineral waters from 41 different countries, 9-20% exceeded the Dutch drinking water standards for chloride, calcium, magnesium, kalium, sodium, sulphate and fluorine. The mineral water quality cannot be qualified as bad since the standards for these compounds with the exception of fluorine, are not based on health effects but on undesirable taste effects and possible negative effects on the water supply system. For the mineral water data set the amount of dissolved compounds, hardness and chloride content appear to be the most distinctive criteria. A mineral water type classification based on these criteria will offer consumers a tool for assessing the mineral water on the basis of the chemical composition data on the bottle label. In terms of the criteria mentioned, average Dutch tap water strongly resembles the Belgian and Dutch mineral waters. This similarity does not extend to the price, since Dutch tap water is about 500 times cheaper. Fri, 16 May 2003 00:00:00 GMT http://hdl.handle.net/10029/11409 2003-05-16T00:00:00Z http://hdl.handle.net/10029/8391 Title: Spores from mesophilic Bacillus cereus strains germinate better and grow faster in simulated gastro-intestinal conditions than spores from psychrotrophic strains. Authors: Wijnands, L M; Dufrenne, J B; Zwietering, M H; Leusden, F M van Abstract: The species Bacillus cereus, known for its ability to cause food borne disease, consists of a large variety of strains. An important property for discrimination of strains is their growth temperature range. Psychrotrophic strains can grow well at refrigerator temperatures but grow at 37 degrees C with difficulty. Mesophilic strains on the other hand are unable to grow below 10 degrees C, but grow well at 37 degrees C. Spores of six psychrotrophic and six mesophilic strains were investigated for their ability to survive and grow in simulated gastro-intestinal fluids, mimicking the conditions in the gastro-intestinal tract. The germination potential of psychrotrophic and mesophilic spores in simulated intestinal fluid does not differ much. Under conditions simulating the gastro-intestinal passage, 5 out of 6 mesophilic strains showed growth, and only 2 out of 6 psychrotrophic strains. Temperature (37 degrees C) and simulated gastro-intestinal conditions together influenced germination and growth. Wed, 01 Nov 2006 00:00:00 GMT http://hdl.handle.net/10029/8391 2006-11-01T00:00:00Z