The stir-frying process in Chinese cooking has produced serious emissions of oily particles, which are an important source urban air pollution. In particular, the complex composition fine particulate may pose a threat to human respiratory and immune systems. However, current filtration methods for fumes have low efficiency, high resistance, equipment costs. polypropylene (PP) electret filters, ...

The diversity and distribution of microfungal assemblages in leaf litter of a tropical Australian forest was assessed using two methods: (1) cultures were isolated using a particle filtration protocol (wet season 2001), and (2) fruit bodies were observed directly on leaf surfaces following incubation in humid chambers (wet and dry season of 2002). Four tree species were studied using both metho...

Aerosol filtration in fibrous filters is one of the principal methods of removal of solid particles from the gas stream. The classical theory of depth filtration is based on the assumption of existing single fiber efficiency, which may be used to the recalculation of the overall efficiency of the entire filter. There are several reasons for inappropriate estimation of the single fi...

In the standard of the approval test for dust respirator certification, test aerosols are defined as air containing quartz particles of 2 microns or smaller1. However, it is well-known that the filtration efficiency of air filters depends on the size of the test aerosol particles. Alternative test aerosols containing submicron size particles will be studied for use in future approval test of du...

Upon searching local similarities in long sequences, the necessity of a 'rapid' similarity search becomes acute. Quadratic complexity of dynamic programming algorithms forces the employment of filtration methods that allow elimination of the sequences with a low similarity level. The paper is devoted to the theoretical substantiations of the filtration method based on the statistical distance b...

The risk of human exposure to finely-dispersed aerosol particles being airborne indoors is determined by the size and number concentration particles, intensity an emission source, air filtration ventilation efficiency, etc. emphasis in this article on behaviour patterns when exposed ultrasonic electrostatic fields different conditions temperature relative humidity. Wood flour having sizes inter...

The World Health Association and many governmental agencies recommend the wearing of facemasks by general public to prevent spread COVID-19. It is believed that masks can significantly protect others may offer some protection wearer. Although there are standards for FFRs, surgical masks, recently barrier face coverings, they all indicate level However, testing facial not at point inhalation, bu...