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Water vapor formation causing reversible aerodynamic effect on the distribution of aero-algal forms

Jogita T. Pandkar


Aerodynamic is a branch which deals with the study of takeoff and passive transport mechanism of bio-particles with the help of physical and mathematical modules. But there is not a single report on the aero-dynamic study with respect to manipulated meteorological condition. Nagpur being hottest during summer month, the frequency of using air coolers is very high. An air cooler is a device which evaporates water with the help of fan to bring down room temperatures which results into increase in room humidity very much. To study the effect of humidity on the distribution and occurrence of aero algal forms sampling was carried out at three different sites, fitted with air cooler, from April- Mid May, using Rotarod sampler. Total 84 algal forms were recorded from 46 samples collected from three different sites. Cyanophyta was found to be dominant, followed by Bacillariophyta, Chlorophyta and Euglenophyta respectively. Trentipholia is found to be dominant algal forms followed by Chroococcos, Microcystis, Aphanocapsa, Chlorella & Euglena respectively. Forms such as Chroococcidiopsis, Merismopedia, Aphanocapsa, Gleocapsa, Phormidium, Hormidium & Pinnularia were recorded in equal proportion. Forms such as Chlorella, Microcystis, Phormidium & Hormidium reported to be allergenic has been encountered. Irrespective of dry environmental condition with high temperature and low humidity (the condition considered to be favourable for dispersal of aero-algal forms, resulting into high concentration of air-borne algal flora) during sampling period, at all the three sites, minimum number of aero-algal forms were encountered due to increased humidity at the sampling sites. This can be due to manipulated micrometeorological conditions resulting into reversible aerodynamic effect on the aero- algal forms. Humidity of room air is increased by releasing water droplets in the atmosphere which act as a mode of reversible dispersion of aero-algal forms from higher level to the ground level, resulting into reduction in aero-algal counts at human breathing level. This finding, if experimented further with aero-algal and other bio-particles, can be good news for allergy patients.


Manipulated micrometeorological conditions; Humidity; Aero-algal counts; Air- cooler; Aerodynamic; Allergy.

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