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Prolonging survival in good health is a fundamental societal goal. However, the leading determinants of disability-free survival in healthy older people have not been well established. Data from ASPREE, a bi-national placebo-controlled trial of aspirin with 4.7 years median follow-up, was analysed. At enrolment, participants were healthy and without prior cardiovascular events, dementia or persistent physical disability. Disab...
A total of 163 wells were sampled in New Zealand as part of the 2006 national survey of pesticides in groundwater. The aims of the survey were to update the national overview of pesticides in New Zealand's groundwater systems, to investigate temporal variation in pesticide concentrations between surveys, and to identify environmental factors associated with pesticide contamination of groundwater. Thirty‐one wells (19%) tested...
The transport and attenuation of cadmium (Cd) and rhodamine WT (RWT) in a pumice sand aquifer media was investigated using column experiments to study a scenario of point‐source contamination. A pore‐water velocity of 1.7–1.8 m/day, which is a typical field groundwater velocity in a pumice sand aquifer system, was applied to triplicate columns. A pulse of a solution containing Cd and RWT, together with the conservative tracer...
A total of 133 wells throughout New Zealand were sampled for the 2002 National Survey of Pesticides in Groundwater. The survey objectives were to provide a national overview of pesticides in New Zealand's groundwater systems, to examine changes with time from earlier surveys, and to examine factors linked with pesticide contamination. The samples were screened for atrazine in the laboratory using an ELISA test kit and, as a re...
A total of 95 wells throughout New Zealand were sampled during summer 1998/99 and analysed for a range of pesticides using gas chroma‐tography‐mass spectroscopy (GCMS). Thirty‐three wells (35%) had pesticides including triazine metabolites detected, with 18 wells (19%) having two or more pesticides detected. Only one well (K38/ 0172) had pesticides detected at levels greater than the maximum acceptable value (MAV) for drinking...
Attenuation and transport of atrazine and picloram in an alluvial gravel aquifer: A tracer test and batch studyNARA Subscribed
A natural‐gradient tracer experiment and laboratory batch tests were conducted to study attenuation and transport of atrazine and picloram in an alluvial gravel aquifer. An analytical transport model, AT123D, was used to analyse the field data. Data analysis suggests that there was no retardation and degradation of atrazine and picloram in the aquifer over a distance of 90 m within a period of 49 h. In the batch tests with a m...
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