Risks from ionizing radiation

For the public in the United Kingdom--and the United States--natural radon is a far greater radiation hazard than are emissions from nuclear installations.     

Total systems intervention and human inquiry: The search for a common ground

Total Systems Intervention (TSI) is an approach to intervening in problem situations which has much to offer where complex interacting issues need to be addressed by the complementary use of intervention methodologies. That such an approach has much in common with Action Research (AR) has been recognized, with much recent effort being devoted to the relationship between AR and Critical Systems Thinking (CST), the theoretical endeavor underpinning TSI. This paper further develops this line of debate and relates AR or Human Inquiry (HI) more directly to TSI, using an information systems intervention to enhance the study. The outcome is a demonstration of how TSI implicitly uses techniques informed from the field of Action Research, and how a more thorough synthesis of HI with TSI might serve to improve the overall intervention process.     

A possible correlation between reverse mutation and complementation

Résumé Les mutants présentant la complémentation intra-allélique sont probablement susceptibles aussi de mutation reversé vraie sous l'effet de l'acide nitreux.     

A bacteriocinogenic type 1 strain ofKlebsiella pneumoniae

Résumé La souche 1.2 (N.C.T.C. 5054) deKlebsiella pneumoniae est bactériocinogène. Sur 47 souches de Klebsiella étudiées 25% se sont révélées sensibles à cette bactériocine.

---

---

We are grateful to ProfessorJ. P. Duguid, Drs.B. H. Park, I. Ørskov, andY. Hamon for strains and information.