Placing death under control

A deletion mutation placing the galactokinase gene of Escherichia coli under control of the biotin promoter.

A deletion has been isolated which fuses galK and presumably galT to the promoter and operator of the bioA operon. The deletion has endpoints in bioA and galE, and leaves the operator-proximal end of bioA intact and the regulatory sites themselves functional. In bacterial strains which carry the deletion, the expression of galK is regulated by biotin, although due to the inefficiency of the bio...

Death under Chloroform

Locale-based access control: placing collaborative authorization decisions in context

Collaboration systems require an appropriate uurhorizarion model to specifL and winrain policies that iiut only facilitate group activities but also enforce restrictions and uccountubility. Existing models fail to incorporate adequately into authorization decisions the rich notion of context rhut is inherent to any collaborative setting. In this paper we present the Locale-based Access Control ...

Apoptotic cell death under hypoxia.

Eukaryotic life depends largely on molecular oxygen. During evolution, ingenious mechanisms have evolved that allow organisms to adapt when oxygen levels decrease. Many of these adaptional responses to low oxygen are orchestrated by the heterodimeric transcription factor hypoxia-inducible factor (HIF). Here, we review the link between HIF and apoptosis.

Problems in Child Placing

so often does, Child Placing affords the greatest challenge in the scheme of modern social rehabilitation. No other problem has more lasting results in time or broader scope in the outcome. It is the inalienable right of every child to be provided with such conditions and circumstances as will foster the attainment of his highest development. His health, his education, his training, and happine...