First year of using logbook. You must keep a logbook during this income year. Using the car for less than 12 weeks before the end of the income year. You are able to continue to keep the logbook in the following income year so that your logbook covers the required 12 weeks. Keeping logbooks for two or more cars. The logbook for each car must cover the same period.
Natural killer cell: A cell that can react against and destroy another cell without prior sensitization to it. Abbreviated NK cell. NK cells are part of our first line of defense against cancer cells and virus-infected cells. NK cells are small lymphocytes that originate in the bone marrow and develop without the influence of the thymus. An NK cell attaches to a target cell, releases chemicals that breach its cell wall, and causes it to lyse (break up).
In the innate immune system, antigens are the pathogenâassociated molecular patterns recognised by the pattern recognition receptors expressed on macrophages, dendritic cells and NK cells. NK cells express an array of additional sets of receptors that recognise unconventional antigens. Natural killer (NK) cells are innate immune cells which express an array of unique germâlineâencoded nonrearranging receptors that recognise unconventional antigens. 2  Recognition with finer antigenic specificity is executed by immunoglobulin and Tâlymphocyte receptors in the adaptive immune system.