Abstract: Disclosed is a method of quantitative estimation of carbonaceous particles in biological samples such as biological cells and tissues.

Abstract: A method of controlling the motion of a spinner in an imaging device is described. The spinner is rotatable at known angular velocity about an axis and moveable in a traverse direction along the axis. The method comprises: receiving an index pulse indicative of a rotational position of the spinner; synchronising the traverse movement of the spinner to the received index pulse; and moving the spinner in the traverse direction such that the spinner arrives at a predetermined target location with the spinner in a predetermined orientation for imaging.

Abstract: A cyclone burner in which an air/fuel mixture is admitted through one or more ports located close to the throat through which combustion products escape from the burner, and additional air is admitted through one or more inlets located closer to the throat than said port or ports. The air/fuel mixture is admitted such that it moves tangentially to the curved internal wall of the burner, and the additional air is admitted such that it moves generally tangential to the direction of the combustion products travelling towards the throat, and towards one of the air/fuel ports.