Transporter characterisation reveals aminoethylphosphonate mineralisation as a key step in the marine phosphorus redox cycle.

The planktonic synthesis of reduced organophosphorus molecules, such as alkylphosphonates and aminophosphonates, represents one half of a vast global oceanic phosphorus redox cycle. Whilst alkylphosphonates tend to accumulate in recalcitrant dissolved organic matter, aminophosphonates do not. Here, we identify three bacterial 2-aminoethylphosphonate (2AEP) transporters, named AepXVW, AepP and AepSTU, whose synthesis is independent of phosphate concentrations (phosphate-insensitive).

Variables associated with recidivism and program-termination of delinquent adolescents.

Reexamined variables--parental status, age at first court contact, amount of pretreatment delinquency, age at admission, diagnosis and intelligence estimates--that have been associated with recidivism of delinquent adolescents (N = 89). Groups of recidivating and nonrecidivating delinquents and a third comparison group of prematurely program-terminated delinquents were compared across all variables. The results provided additional support for the association of age and cognitive variables with premature treatment termination and recidivism and generally supported previous research findings.