Abstract: A system and method for controlling operation of an ultraviolet air treatment device including an ultraviolet lamp positioned to treat air within an air handling system that operates in either an on state or an off state. The method includes activating the ultraviolet lamp, and determining the operational state of the air handling system. The ultraviolet lamp is deactivated upon expiration of a predetermined time period during which the air handling system remains in the off state. The predetermined time period is preferably 30-60 minutes, preferably 40 minutes for residential applications.

Abstract: Process for transformation of Yarrowia lipolytica, vectors useful therefor comprising DNA of a microbial vector and chromosomal DNA of Y. lipolytica and transformants comprising said vectors in E. coli and Y. lipolytica, and integrative shuttle vectors for Escherichia-Yarrowia transgeneric cloning. Said vectors or subclones thereof enable creation of Y. lipolytica cloning vectors into which specific or random segments of DNA can be inserted and the resulting vectors used to transform a suitable host microbe, especialy Y. lipolytica, to improve the fermentation characteristics thereof and hence their industrial utilization.The methodology described permits the cloning of genes from a gene library of Y. lipolytica by complementation with an integrating vector.