| 1 | Research shows that when the negative oxygen ion concentration in the air when it reaches a, will reduce the amount of particulates in the air above. | |
| 2 | The results were shown as follows:The concentration of n-alkanes is relative high but its variance depends on different seasons or areas; | |
| 3 | In this work, samples of airborne particulates, vent gas and smog dust during heating and non-heating seasons were collected in the urban and suburban areas of Lanzhou. | |
| 4 | A simple, rapid method for the determination of Pb, Zn, Cu in airborne particulatesby AAS after ultrasonic extraction was described. | |
| 5 | The very hot surfaces of steam heating cause a parching effect on the air , often accompanied by a disagreeable odor of burnt dust . |
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