Abstract: According to an exemplary embodiment of the present disclosure, power is temporarily supplied to the basic dust collector and the first dielectric is charged with an electric charge, and then power supplying is stopped and dust-containing gas passes through a space between a plurality of basic dust collectors or a space between roll-type basic dust collectors to perform dust collection, and as a result, dust can be collected while the use of power supplied to a DC power supply unit from an external power supply is minimized, and further, dust collection efficiency can be increased by a concentration and distortion phenomenon at a portion where the first electrode forming a predetermined pattern is formed in the basic dust collector.

Abstract: The present invention provides a dust collector which includes a chamber divided into an inlet chamber and a discharge chamber by a barrier, and a bag filter which is installed inside of the inlet chamber, and is formed in a shape having an inner space and an opening part by a filter medium, so as to communicate with the discharge chamber through the opening part, wherein a treatment gas is introduced into the inlet chamber and is filtered while passing through the filter medium of the bag filter, then moves to the discharge chamber through the opening part to be discharged, and the bag filter has air permeability decreased toward the opening part. According to the bag filter and the dust collector, it is possible to achieve a high collection performance and a stable operation even when using a long bag filter due to improvement of uniformity of the filtration velocity along the length of the bag filter.

Abstract: The present invention provides a dust collector which includes a chamber divided into an inlet chamber and a discharge chamber by a barrier, and a bag filter which is installed inside of the inlet chamber, and is formed in a shape having an inner space and an opening part by a filter medium, so as to communicate with the discharge chamber through the opening part, wherein a treatment gas is introduced into the inlet chamber and is filtered while passing through the filter medium of the bag filter, then moves to the discharge chamber through the opening part to be discharged, and the bag filter has air permeability decreased toward the opening part. According to the bag filter and the dust collector, it is possible to achieve a high collection performance and a stable operation even when using a long bag filter due to improvement of uniformity of the filtration velocity along the length of the bag filter.

Abstract: A method for quantitatively evaluating the antimicrobial activity of an antimicrobial sample using a disc diffusion method, and a measurement system using the method are provided. The method comprises: (a) measuring a maximum inhibition zone width (IZWmax) for a first sample, in which a colony is expected not to be observed, using a disc diffusion method, and measuring a colony forming unit (CFU0) value for the first sample using a colony counting method; (b) measuring a microbial growth inhibition zone width (IZWi) and a colony forming unit (CFUi) value for a second sample having any antimicrobial activity; (c) calculating ? value and ? value based on the results of steps (a) and (b) using equations (10) and (20); (d) measuring a microbial growth inhibition zone width (IZWx) for a measurement sample; and (e) calculating a quantitative antimicrobial activity value (?) using equation (30).