34 results about "Smoke aerosol" patented technology

The invention relates to a method for establishing an animal in-vitro tracheal model for evaluating inflammatory response induced by tobacco mainstream smoke and an evaluation method, and belongs to the technical field of cigarette hazard assessment. The method for establishing the animal in-vitro tracheal model comprises the following steps: 1) separating a tracheal ring; 2) culturing the tracheal ring obtained in the step 1) in vitro; and 3) exposing the tracheal ring cultured in the step 2) to a flue gas condensate for 1 to 24 hours. The evaluation method of the inflammatory response induced by the tobacco mainstream smoke comprises selection of evaluation indexes and division of evaluation criteria; and evaluation of the degree of the inflammatory response. The method has the followingadvantages: 1) the detection method of the tracheal inflammation after smoke exposure has high efficiency; 2) the detection method of the tracheal inflammation after smoke exposure has good repeatability and system stability and high accuracy; and 3) the use range is wide. The method can be applied to in vitro exposure models of cigarette mainstream smoke, sidestream smoke, ambient flue gas and other smoke aerosols.

The invention relates to an elevation-type cigarette side-stream smoke aerosol rapid collecting hood and a detection method thereof. The elevation-type cigarette side-stream smoke aerosol rapid collecting hood comprises a collecting hood body, an electric elevation table and a base support, which are successively connected from top to bottom; the collecting hood body comprises a cylindrical hood body with an air inlet and a funnel hood body connected to the upper end of the cylindrical hood body in a sealing manner; the upper end of the funnel hood body is provided with a funnel hood body exhaustion pipe, the outer side of the funnel hood body exhaustion pipe is sleeved with a pre-dilution casing pipe, the bottom end of the pre-dilution casing pipe is fixed to the outer surface of the funnel hood body in a sealing manner, and the bottom is provided with a pre-dilution air inlet; the base support is fixedly provided with a smoke suction pipeline coaxially arranged with the collecting hood body; the smoke suction pipeline penetrates through the electric elevation table and a central hole of a bottom end cover of the cylindrical hood body and is connected with a smoke suction machine; a cigarette is fixed to the smoke suction pipeline by virtue of a cigarette clamping device and coaxially and vertically installed; and the electric elevation table is used for driving the collecting hood body to integrally move downwards, a descending speed is equal to a smoldering rate of the cigarette, and a distance from a cigarette burning cone to the inlet of the funnel hood body exhaustion pipe is ensured to be 15 to 20 mm.

The invention discloses a particle size grading acquisition method of cigarette mainstream smoke aerosol, comprising the following steps of: (1) allowing cigarette to generate mainstream smoke aerosol on a smoke generating device; (2) allowing particle-free clean air to passively enter into a gas flow balancer in a continuous and main-road mode, and simultaneously allowing the mainstream smoke aerosol to actively enter the gas flow balancer in an interval and by-pass mode; (3) allowing the clean air or a gas mixture of the clean air and the mainstream smoke aerosol to passively enter into an aerosol multistage sampler at constant airflow velocity; (4) arranging an airflow velocity control system, which is used to set corresponding airflow velocity according to the working index of the sampler, inside the aerosol multistage sampler; (5) allowing the mainstream smoke aerosol to gather in the aerosol multistage sampler according to the particle size interval grading. According to the invention, two technical obstacles by the combination of an automatic smoking machine and the aerosol multistage sampler are overcome: one is gas flow difference; and the other is the difference between continuous flow and intermittent flow. The method provided by the invention can be used to realize grading acquisition of mainstream smoke by the aerosol multistage sampler.