https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34513 Wed 27 Apr 2022 14:49:53 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:29875 Wed 27 Apr 2022 14:49:21 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:19999 Wed 11 Apr 2018 15:33:49 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:14382 2S concentration in the sewer headspace with pre-corroded coupons experiencing more rapid decreases for a given H₂S concentration. Extensive corrosion of sound concrete has also been observed on pre-corroded samples over this period while minor losses are becoming apparent on new coupons. The combination of pH change, concrete losses and appearance of biological activity on the coupon surface all point to a rapid transition through an initial abiotic corrosion phase to the next stage in which corrosion is the result of neutrophilic microbial activity. A comparison of the early corrosion activity of new and pre-corroded coupons and anomalous readings at one high H2S location also indicate that the corrosion rate will most likely vary in a complex fashion over time and will be influenced by a variety of environmental factors in addition to H₂S levels. As more field data is collected and complementary laboratory and biological data become available a realistic, phenomenological model of this process will be developed allowing the service life of sewer pipes in Australia to be realistically predicted.]]> Wed 11 Apr 2018 13:07:42 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:9061 Wed 11 Apr 2018 09:26:00 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:32585 Thu 21 Jun 2018 12:49:29 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:20451 Sat 24 Mar 2018 08:06:58 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:5477 Sat 24 Mar 2018 07:47:04 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26889 Sat 24 Mar 2018 07:41:40 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38746 1 %) and rare (<0.1 %) microbial taxa showed that a larger number of rare members (phylotype) displayed greater overall range in activity than was apparent for more abundant members. Certain taxa from both abundant and rare populations varied rapidly in their 16S rRNA levels in response to tidal cycling. The observation of rRNA accumulation in response to drying and rewetting was used to divide the microbial community structure into 'early responders' (within 3 h of dry-down or wet-up) and 'delayed responders' (3+ h after wet-up). Response patterns were phylogenetically constrained across supra- to subtidal zones across all tidal stages. Microbial iron- and sulfur-cycling networks included these rare but active taxa, illustrating their spatiotemporal complexity, which should be considered for an accurate assessment of bioremediation efficiency, and specially for validating predictive biogeochemical models of long-term CASS ecosystems.]]> Fri 21 Jan 2022 12:35:02 AEDT ]]>