Abstract: The present invention is directed to variants of Agrobacterium tumefaciens. These variants are either resistant to the effects of MDIBOA/DIMBOA, or hypersensitive to phenolic induction. These variants are improved over wild-type Agrobacterium in their ability to transform plant cells. Also provided are methods for their selection. In a distinct embodiment, there also is provided a modified Ti plasmid that increases the ability of an Agrobacterium strain to transform host cells. The plasmid contains virA and virG genes, under the control of the coliphage T5 PN25 promoter.

Abstract: Flexibility in the control of the compressor bleed valve is of the type utilized in a twin spool axial flow engine for preventing compressor surge is manifested by electronically summing an approximated rate of change of burner pressure that has a first order time constant introduced to actual burner pressure and a burner pressure limit that is scheduled as a function of corrected high pressure compressor speed and the altitude of the aircraft. The signal may be treated by a hysteresis circuit to stabilize the bleed valve.

Abstract: This invention provides novel lipoglycosides having the structural formula: ##STR1## wherein R.sub.1 and R.sub.2 are different and are selected from the group consisting of hydrogen and ##STR2## The lipoglycosides have antitumor properties.