Main Environmental Factors Affecting Concentrations of Culturable Airborne Bacteria in Indoor Laboratories Over a Period of One Year

Abstract

Abstract. This study aimed to assess temporal changes in the concentration of culturable airborne bacteria (CAB) in three microbiology laboratories to determine the environmental factors that affects CAB concentration. The CAB concentration was determined once per month from March 2011 to February 2012 in the three laboratories. An Andersen one-stage sampler was used to collect CAB for 5 min, three times per day. CAB concentrations demonstrated an increasing tendency in summer and fall, but it was difficult to detect consistent seasonal patterns. Temperature, relative humidity (RH), number of people, and activity of people were associated with CAB concentrations. The overall CAB concentrations were significantly greater in the study rooms than that in the laboratory. CAB concentrations in indoor microbiology laboratories varied greatly depending on the number of people and whether or not a humidifier was used.

Waste Separation Intention of China’s Urban Residents and its Influencing Factors

“…At present, in the western academic sector, in the studies on household waste management behavior, especially in the studies of the process of household waste recycling in the perspective of social psychology, many scholars have conducted in-depth analyses of waste classification behavior to explore the influencing factors of household waste separation and to investigate urban residents' awareness and attitudes during the process of waste separation (Wang 2017). These results play an extremely important role in guiding and promoting the habit of household waste separation (Knussen et al, 2004;Hwang et al, 2017).…”