People
Dr UCHIDA Akira
Senior Research Fellow

Research interests:

Understanding airborne microorganisms of:

  1. Sources and sinks: to locate and identify where the microbes are coming from.

We know microorganisms are existing in the air.In the past year, we have been revealing what kind of microorganisms are in and out from outdoor air in Singapore.Time of the day is major contributor to the composition of airborne microorganisms.Our analyses show that most of bacteria are detected during daytime while fungi are dominating during night time.

We started understanding the airborne microbial ecosystem.

The interests are now moving on to identify sources of microbes.The sources mean where the microorganisms are released (aerosolized) into the air.One of the approaches is swabbing surfaces surrounding our regular air sampling site.

  1. How/ how long (distance and time) airborne microorganisms are transported?

Particles with sized ~1 µm can be suspended in the air for hours.  It is still interesting to study the airborne microbes collected at our sampling site are only transported the distance which wind can travel in the hours.  In the different monsoon seasons, the wind direction in Singapore changes between northeast and southwest.  It is interested in studying airborne microbiota at the beach before the winds hit land, and paths of the wind by using atmospheric air trajectory simulation.