Science and Engineering
This community houses research from the Faculty of Science and Engineering at the University of Waikato.
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Identification and structure elucidation of epoxyjanthitrems from Lolium perenne infected with the endophytic fungus Epichloë festucae var. lolii and determination of the tremorgenic and anti-insect activity of epoxyjanthitrem I.
(2020-08-17)Epoxyjanthitrems I-IV (1-4) and epoxyjanthitriol (5) were isolated from seed of perennial ryegrass (Lolium perenne) infected with the endophytic fungus Epichloë festucae var. lolii. Although structures for epoxyjanthitrems ... -
Spectroscopy of OSSO and other sulfur compounds thought to be present in the Venus atmosphere.
(ACS Publications, 2020)The spectroscopy of cis-OSSO and trans-OSSO is explored and put into the context of the Venusian atmosphere, along with other sulfur compounds potentially present there, namely, S₂O, C₁-S₂O₂, trigonal-S₂O₂, and S₃. UV-vis ... -
Tokomaru Bay Wharf and heritage buildings restoration design: Innovating a holistic final year civil design project
(2019)CONTEXT The discipline of civil engineering focuses on creating the built environment necessary for a functioning society, however, curriculum often focuses on the design of specific structures in isolation from the larger ... -
Industrial heat pump integration in non-continuous processes using thermal energy storages as utility - An NLP enhancement of the graphical approach
(2018)The aim of this paper is to enhance the results of the graphical approach for Heat Pump (HP) integration in noncontinuous processes. A nonlinear programming (NLP) formulation is developed which optimizes temperature levels ... -
Wanted dead or alive? Using metabarcoding of environmental DNA and RNA to distinguish living assemblages for biosecurity applications
(Public Library Science, 2017)High-throughput sequencing metabarcoding studies in marine biosecurity have largely focused on targeting environmental DNA (eDNA). DNA can persist extracellularly in the environment, making discrimination of living organisms ... -
Redating the earliest evidence of the mid-Holocene relative sea-level highstand in Australia and implications for global sea-level rise.
(Public Library Science, 2019)Reconstructing past sea levels can help constrain uncertainties surrounding the rate of change, magnitude, and impacts of the projected increase through the 21st century. Of significance is the mid-Holocene relative sea-level ... -
Theoretical study of the structures of 4-(2,3,5,6-tetrafluoropyridyl)diphenylphosphine oxide and tris(pentafluorophenyl)phosphine oxide: Why does the crystal structure of (tetrafluoropyridyl)diphenylphosphine oxide have two different P=O bond lengths?
(MDPI, 2020)The crystal structure of 4-(2,3,5,6-tetrafluoropyridyl)diphenylphosphine oxide (1) contains two independent molecules in the asymmetric unit. Although the molecules are virtually identical in all other aspects, the P=O ... -
Chemical modification of Dendrocalamus asper bamboo with citric acid and boron compounds: Effects on the physical-chemical, mechanical and thermal properties
(Elsevier BV, 2021)The effect of environmentally friendly treatment using citric acid and boron compounds on the physical-chemical and mechanical properties and thermal degradation of D. asper bamboo was investigated. The chemical modification ... -
The role of seagrass vegetation and local environmental conditions in shaping benthic bacterial and macroinvertebrate communities in a tropical coastal lagoon.
(2020)We investigated the influence of seagrass canopies on the benthic biodiversity of bacteria and macroinvertebrates in a Red Sea tropical lagoon. Changes in abundance, number of taxa and assemblage structure were analyzed ... -
Sustainable energy transition toward renewable energies in the New Zealand dairy industry: An environmental life cycle assessment
(AIDIC Servizi S.r.l., 2019)The dairy processing industry is considered as energy-intensive processes between New Zealand industries that use fossil fuels as a primary energy source which results in greenhouse gas emissions as well as raising other ... -
Time-of-flight range image measurement in the presence of transverse motion using the Kalman filter
(IEEE, 2018)Time-of-flight range imaging cameras measure distance to objects in their field of view, but are prone to error when objects move. At least three raw frames are required to obtain one range image, and the standard method ... -
Vital evidence: Change in the marine ¹⁴C reservoir around New Zealand (Aotearoa) and implications for the timing of Polynesian settlement.
(Springer Nature, 2020)Precise and accurate radiocarbon chronologies are essential to achieve tight chronological control for the ~ 750-years since Polynesian settlement of New Zealand. This goal has, however, been elusive. While radiocarbon ... -
A core phyllosphere microbiome exists across distant populations of a tree species indigenous to New Zealand
(Public Library Science, 2020)The phyllosphere microbiome is increasingly recognised as an influential component of plant physiology, yet it remains unclear whether stable host-microbe associations generally exist in the phyllosphere. Leptospermum ... -
Post-transcriptional modulation of the SigF regulon inMycobacterium smegmatisby the PhoH2 toxin-antitoxin
(Public Library Science, 2020)PhoH2 proteins are highly conserved across bacteria and archaea yet their biological function is poorly characterised. We examined the growth profiles of Mycobacterium smegmatis strains mc²155 and mc²155 ΔphoH2 and observed ... -
Rapid carbon accumulation in a peatland following Late Holocene tephra deposition, New Zealand
(Elsevier, 2020)Contemporary measurements of carbon (C) accumulation rates in peatlands around the world often show the C sink to be stronger on average than at times in the past. Alteration of global nutrient cycles could be contributing ... -
Sub-millennial eruptive recurrence in the silicic Mangaone Subgroup tephra sequence, New Zealand, from Bayesian modelling of zircon double-dating and radiocarbon ages
(Elsevier, 2020)Accurate dating of young (<1 Ma) volcanic eruptions has long been a challenge for modern geochronology given the scarcity of datable mineral phases and low quantities of radiogenic daughter products. Combined U-Th-Pb and ... -
Use of recycled pulped chromated copper arsenate-treated wood fibre in polymer composites
(MDPI, 2018)The goal of this study was to investigate if it is possible to recycle chromated copper arsenate (CCA)-treated wood for use in wood polymer composites. This was done by soda pulping wood chips of CCA-treated lumber in a ... -
Sustainable composite fused deposition modelling filament using post-consumer recycled polypropylene
(MDPI, 2017)Post-consumer recycled polypropylene (PP) with differing harakeke and hemp fibre contents was used to fabricate a range of 3D printing feedstock filaments. The most successful filaments in terms of tensile properties ... -
In situ collection and preservation of intact Microcystis colonies to assess population diversity and microcystin quotas
(MDPI, 2019)Understanding of colony specific properties of cyanobacteria in the natural environment has been challenging because sampling methods disaggregate colonies and there are often delays before they can be isolated and preserved. ... -
Fused deposition modelling of natural fibre/polylactic acid composites
(MDPI, 2017)Fused deposition modelling is a simple additive manufacturing technology utilising fine filament extrusion of predominantly thermoplastic materials to build 3D objects layer by layer. This research explores the feasibility ...
