A5001930411- Bacterial Genetics and Biotechnology
- DNA Repair Mechanisms
- Heavy metals in environment
- Plant and animal studies
- Fluoride Effects and Removal
- Botany, Ecology, and Taxonomy Studies
- Plant Micronutrient Interactions and Effects
- Bacteriophages and microbial interactions
- Ecology and Vegetation Dynamics Studies
- Wastewater Treatment and Reuse
- Enzyme Structure and Function
- Soil and Water Nutrient Dynamics
- Antibiotic Resistance in Bacteria
- Aluminum toxicity and tolerance in plants and animals
- Phosphorus and nutrient management
- Heavy Metals in Plants
- Water resources management and optimization
- Water Quality and Pollution Assessment
- Morphological variations and asymmetry
- Developmental Biology and Gene Regulation
- Constructed Wetlands for Wastewater Treatment
- Clay minerals and soil interactions
- Plant and Fungal Species Descriptions
- Botany and Plant Ecology Studies
- Water Quality and Resources Studies
Newcastle University
1988-2024
Kettering University
2023
CSIRO Land and Water
1998-2010
Arris (United States)
2007
Commonwealth Scientific and Industrial Research Organisation
1998-2003
The University of Adelaide
1998-2000
Swansea University
1985-1988
Abstract Soil testing for metal contaminants is a continually evolving process aimed at improving the assessment of environmental and human health hazards associated with heavy metals in soils plants. A number challenges present themselves before accurate, reliable precise contaminant hazard criteria plants can be made. These include: sampling, extraction analytical obstacles determination trace levels media; quality assurance control issues both procedures (especially where non‐compliance...
One method for preventing the degradation of water supplies through contamination with phosphorus (P), nitrate (NO3), and dissolved organic carbon (DOC) is to restrict movement these contaminants from catchment into bodies. The purpose study was quantify characterise proportion NO3, P, DOC moving duplex soils by overland flow through-flow on a sub-catchment scale, soil properties that influence their movement. Two sites in Adelaide Hills (South Australia) contrasting were instrumented...
On a small scale, reclaimed water (RCW) use has been practised on the Northern Adelaide Plains (NAP) horticultural districts for more than 28 years. The RCW had approximately 1.7 times salinity and twice sodium absorption ratio (SAR) of bore commonly used irrigation in district. Recently, large-scale reclamation scheme commissioned which could eventually supply 30 GL to over 250 growers NAP. This study compared historical quality time data with physico-chemical properties soil cores taken...
Article27 June 2019Open Access Transparent process Identification of a basal system for unwinding bacterial chromosome origin Tomas T Richardson Centre Bacterial Cell Biology, Institute and Molecular Biosciences, Newcastle University, Upon Tyne, UK Search more papers by this author Daniel Stevens Simone Pelliciari orcid.org/0000-0003-3150-9136 Omar Harran Theodor Sperlea orcid.org/0000-0003-4307-2963 Chromosome Biology Group, LOEWE Center Synthetic Microbiology, SYNMIKRO,...
Journal Article The frequency, distribution and reproductive biology of dioecious species in the native flora Britain Ireland Get access Q. O. N. KAY, KAY 1Department Botany Microbiology Department Genetics, University College Swansea, Swansea SA2 8PP Search for other works by this author on: Oxford Academic Google Scholar D. P. STEVENS Botanical Linnean Society, Volume 92, Issue 1, January 1986, Pages 39–64, https://doi.org/10.1111/j.1095-8339.1986.tb01426.x Published: 28 June 2008 history...
Journal Article On the gynodioecious polymorphism in Saxifraga granulata L. (Saxifragaceae) Get access D. P. STEVENS 1Department of Plant Biology, University Newcastle upon Tyne, NE1 7RU, U.K Search for other works by this author on: Oxford Academic Google Scholar Biological Linnean Society, Volume 35, Issue 1, September 1988, Pages 15–28, https://doi.org/10.1111/j.1095-8312.1988.tb00455.x Published: 14 January 2008 history Received: 18 November 1987 Accepted: 19 1988
Fluoride (F) is an impurity in phosphatic fertilisers and significant amounts of F will be added to soils with long-term application fertiliser soil. There a risk that concentrations soil may increase levels toxic plants or grazing animals. If remains the upper profile, due high reactivity soil, animals could their intake through inadvertent ingestion F-enriched This study determined distribution profile medium (>8 years) permanent pastures (>50 where had been applied as fertiliser,...
SUMMARY The salt tolerances of plants from natural populations Trifolium repens L. (White Clover) growing in saline and non‐saline sites were compared by root growth tests at a range NaCl concentrations. Plants three salt‐marsh showed high or very tolerance, with relatively vigorous 150–200 mM NaCl. two inland little no tolerance. A sea‐cliff population cv. Gwenda intermediate levels tolerance low Halophytic maritime may‐provide material for the development tolerant cultivars T. , crop plant...
The homotetrameric DnaD protein is essential in low G+C content gram positive bacteria and involved replication initiation at oriC re-start of collapsed forks. It interacts with the ubiquitously conserved bacterial master DnaA but structural functional details this interaction are lacking, thus contributing to our incomplete understanding molecular that underpin bacteria. comprises N-terminal (DDBH1) C-terminal (DDBH2) domains, contradicting two-hybrid yeast studies suggesting either former...
Summary. This study investigated whether changing phosphatic fertiliser type affects the accumulation of cadmium (Cd) and fluorine (F) in pasture herbage. North Carolina phosphate rock, partially acidulated fertilisers derived from this generally have higher Cd F concentrations compared with single superphosphate currently manufactured Australia. Clover herbage sites National Reactive Phosphate Rock trial was collected analysed for (11 sites) (4 sites). A comparison made between pastures...
A method has been developed for the speciation of arsenic (AsO − 2 , AsO 3− 4 and dimethylarsinic [DMA]) in natural soil solutions from contaminated sites Australia. The separation these anions was achieved by capillary zone electrophoresis (CZE) using a fused silica (72‐cm 50‐μm i.d.) with basic chromate buffer on‐column indirect UV detection at 254 nm. Method parameters, such as electrolyte pH, run voltage, temperature were studied order to establish suitable analytical conditions. ideal...
The National Biosolids Research Program (NBRP) was established by the CSIRO Centre for Environmental Contaminants in 2002 order to coordinate research relating benefits and risks of using biosolids Australian agriculture. Prior establishment NBRP, on biosolid use agriculture had been concentrated one state (New South Wales), with pockets uncoordinated activity other states. NBRP is a coalition seven agencies around Australia, support from several metropolitan regional water authorities,...
Abstract Genome duplication is essential for the proliferation of cellular life and this process generally initiated by dedicated replication proteins at chromosome origins. In bacteria, DNA ubiquitous DnaA protein, which assembles into an oligomeric complex origin ( oriC ) that engages both double-stranded (dsDNA) single-stranded (ssDNA) to promote duplex opening. However, mechanism specifically opening a was unknown. Here we show Bacillus subtilis ATP continuous oligomer site melting,...
Abstract Procedures for determination of fluoride (F) in plant material employing acid digestion and solution analysis by ion specific electrode (ISE) were compared to alkali fusion using a range materials. The efficiency the methods assessed standard reference (SRM) not previously available F analysis. All procedures tested failed obtain certified value SRM. This was due failure acids liberate bound strongly within silicate minerals found Acid is therefore recommended total F, but could be...
Abstract Genome replication is a fundamental biological activity shared by all organisms. Chromosomal proceeds bidirectionally from origins, requiring the loading of two helicases, one for each replisome. However, molecular mechanisms underpinning helicase at bacterial chromosome origins (oriC) are unclear. Here we investigated essential DNA initiation protein DnaD in model organism Bacillus subtilis. A set residues required ssDNA binding was identified, and photo-crosslinking revealed that...
Abstract Bidirectional DNA replication from a chromosome origin requires the asymmetric loading of two helicases, one for each replisome. Our understanding molecular mechanisms underpinning helicase at bacterial origins is incomplete. Here we report both positive and negative directing recruitment in model organism Bacillus subtilis. Systematic characterization essential initiation protein DnaD revealed distinct interfaces required homo-oligomerization, interaction with master initiator...