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Insect science 2012年第1期19卷 96-101页

作者： Gregory J. Daglish Manoj K. Nayak Agri-Science Queensland Department of Employment Economic Development and Innovation Brisbane Queensland Australia

The potential for using imidacloprid （a neonicotinoid） and indoxacarb （an oxadiazine） as grain protectants was investigated in bioassays against resistant strains of five stored grain beetles. The species investigated were Rhyzopertha dominica （E）（the lesser grain borer）, Sitophilus oryzae （L.）（the rice weevil）, Tribolium castaneum （Herbst）（the rust-red flour beetle）, Oryzaephilus surinamensis （L.）（the saw tooth flour beetle）, and Cryptolestesferrugineus （Stephens）（the fiat grain beetle）. Each of these species has developed resistance to one or more protectants, including organophosphorus insecticides, synthetic pyrethroids and the juvenile hormone analogue methoprene. Mortality and re- production after a 2-week exposure of adults to treated wheat depended on species, dose and insecticide. Imidacloprid had no effect on S. oryzae at any dose, but none of the other species produced any live progeny at 10 mg/kg. Indoxacarb had no effect on T. castaneum at any dose, but none of the other species produced any live progeny at 5 mg/kg. The results show that although both imidacloprid and indoxacarb can control at least four of the five key pests tested at doses comparable to those used for organophosphorus protectants, more potent neonicotinoid or oxadiazine insecticides would be needed than either of these to provide broad spectrum protection of stored grain .

关键词： beetles imidacloprid indoxacarb stored grain

High-Throughput Phenotyping of Dynamic Canopy Traits Associated with Stay-Green in Grain Sorghum

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Plant Phenomics 2020年第1期2卷 269-278页

作者： J.D.Liedtke C.H.Hunt B.George-Jaeggli K.Laws J.Watson A.B.Potgieter A.Cruickshank D.R.Jordan University of Hohenheim 70593 StuttgartGermany Agri-Science Queensland Department of Agriculture and FisheriesWarwickQLD 4370Australia queensland Alliance for agriculture and Food Innovation The University of QueenslandWarwickQLD 4370Australia queensland Alliance for agriculture and Food Innovation The University of QueenslandGatton CampusToowoomba QLD 4343Australia

Drought is a recurring phenomenon that puts crop yields at risk and threatens the livelihoods of many people around the globe.Stay-green is a drought adaption phenotype found in sorghum and other cereals.Plants expressing this phenotype show less drought-induced senescence and maintain functional green leaves for longer when water limitation occurs during grain fill,conferring benefits in both yield per se and harvestability.The physiological causes of the phenotype are postulated to be water saving through mechanisms such as reduced canopy size or access to extra water through mechanisms such as deeper roots.In sorghum breeding programs,stay-green has traditionally been assessed by comparing visual scores of leaf senescence either by identifying final leaf senescence or by estimating rate of leaf senescence.In this study,we compared measurements of canopy dynamics obtained from remote sensing on two sorghum breeding trials to stay-green values(breeding values)obtained from visual leaf senescence ratings in multienvironment breeding trials to determine which components of canopy development were most closely linked to the stay-green phenotype.Surprisingly,canopy size as estimated using preflowering canopy parameters was weakly correlated with stay-green values for leaf senescence while postflowering canopy parameters showed a much stronger association with leaf senescence.Our study suggests that factors other than canopy size have an important role in the expression of a stay-green phenotype in grain sorghum and further that the use of UAVs with multispectral sensors provides an excellent way of measuring canopy traits of hundreds of plots grown in large field trials.

关键词： breeding drought hundreds

Detecting Sorghum Plant and Head Features from Multispectral UAV Imagery

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Plant Phenomics 2021年第1期3卷 337-350页

作者： Yan Zhao Bangyou Zheng Scott CChapman Kenneth Laws Barbara George-Jaeggli Graeme LHammer David RJordan Andries B.Potgieter The University of queensland Queensland Alliance for Agriculture and Food InnovationCentre for Crop ScienceGattonQueensland 4343Australia CSIRO agriculture and Food St.LuciaQueensland 4072Australia The University of queensland School of Agriculture and Food SciencesSt.LuciaQueensland 4072Australia Department of agriculture and Fisheries Agri-Science QueenslandWarwickQueensland 4370Australia

In plant breeding,unmanned aerial vehicles(UAVs)carrying multispectral cameras have demonstrated increasing utility for high-throughput phenotyping(HTP)to aid the interpretation of genotype and environment effects on morphological,biochemical,and physiological traits.A key constraint remains the reduced resolution and quality extracted from“stitched”mosaics generated from UAV missions across large areas.This can be addressed by generating high-quality reflectance data from a single nadir image per plot.In this study,a pipeline was developed to derive reflectance data from raw multispectral UAV images that preserve the original high spatial and spectral resolutions and to use these for phenotyping applications.Sequential steps involved(i)imagery calibration,(ii)spectral band alignment,(iii)backward calculation,(iv)plot segmentation,and(v)application.Each step was designed and optimised to estimate the number of plants and count sorghum heads within each breeding plot.Using a derived nadir image of each plot,the coefficients of determination were 0.90 and 0.86 for estimates of the number of sorghum plants and heads,respectively.Furthermore,the reflectance information acquired from the different spectral bands showed appreciably high discriminative ability for sorghum head colours(i.e.,red and white).Deployment of this pipeline allowed accurate segmentation of crop organs at the canopy level across many diverse field plots with minimal training needed from machine learning approaches.

关键词： breeding backward Plant

Estimating Photosynthetic Attributes from High-Throughput Canopy Hyperspectral Sensing in Sorghum

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Plant Phenomics 2022年第1期4卷 324-341页

作者： Xiaoyu Zhi Sean Reynolds Massey-Reed Alex Wu Andries Potgieter Andrew Borrell Colleen Hunt David Jordan Yan Zhao Scott Chapman Graeme Hammer Barbara George-Jaeggli The University of queensland Queensland Alliance for Agriculture and Food Innovation(QAAFI)Hermitage Research FacilityWarwickQLDAustralia The University of queensland Queensland Alliance for Agriculture and Food Innovation(QAAFI)St LuciaQLDAustralia The University of queensland Queensland Alliance for Agriculture and Food Innovation(QAAFI)GattonQLDAustralia Agri-Science Queensland Department of Agriculture and Fisheries(DAF)Hermitage Research FacilityWarwickQLDAustralia School of agriculture and Food sciences The University of QueenslandGattonQLDAustralia

Sorghum,a genetically diverse C_(4) cereal,is an ideal model to study natural variation in photosynthetic capacity.Specific leaf nitrogen(SLN)and leaf mass per leaf area(LMA),as well as,maximal rates of Rubisco carboxylation(V cmax),phosphoenolpyruvate(PEP)carboxylation(V pmax),and electron transport(J max),quantified using a C_(4) photosynthesis model,were evaluated in two field-grown training sets(n=169 plots including 124 genotypes)in 2019 and 2020.

关键词： capacity maximal Sorghum

Molecular phylogenetic analysis reveals six new species of Diaporthe from Australia

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Fungal Diversity 2013年第4期61卷 251-260页

作者： Y.P.Tan J.Edwards K.R.E.Grice R.G.Shivas Department of agriculture Fisheries and Forestry Plant Pathology HerbariumBiosecurity QueenslandDutton ParkQld 4102Australia Department of Primary Industries Biosciences Research DivisionGully Delivery CentrePrivate Bag 15FerntreeVic 3156Australia Department of agriculture Fisheries and Forestry Agri-Science QueenslandMareebaQld 4880Australia

t Six new species of Diaporthe,D.beilharziae on Indigofera australis,D.fraxini-angustifoliae on Fraxinus angustifolia subsp.oxycarpa,D.litchicola on Litchi chinensis,D.nothofagi on Nothofagus cunninghamii,D.pascoei on Persea americana and D.salicicola on Salix purpurea from Australia are described and illustrated based on morphological characteristics and molecular analyses.Three of the new species no longer produced sporulating structures in culture and two of these were morphologically described from voucher specimens.Phylogenetic relationships of the new species with other Diaporthe species are revealed by DNA sequence analyses based on the internal transcribed spacer(ITS)region,and partial regions of theβtubulin(BT)and translation elongation factor 1-alpha(TEF).

关键词： Diaporthe beilharziae Diaporthe fraxiniangustifoliae Diaporthe litchicola Diaporthe nothofagi Diaporthe pascoei Diaporthe salicicola BT ITS Phylogeny Phomopsis TEF

Effect of struvite and organic acids on immobilization of copper and zinc in contaminated bio-retention filter media

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Journal of Environmental sciences 2020年第11期32卷 35-44页

作者： Chathurani Moragaspitiya Jay Rajapakse Graeme J.Millar science and Engineering Faculty Queensland University of Technology(QUT)Queensland 4000Australia

Few studies have been carried out to connect nutrient recovery as struvite from wastewater and sustainable utilization of the recovered struvite for copper and zinc immobilization in contaminated soil.This study revealed the effect of struvite on Cu and Zn immobilization in contaminated bio-retention soil in the presence of commonly exuded plant organic acids.The research hypothesis was that the presence of both struvite and organic acids may influence the immobilization of Cu and Zn in soil.The outcome of this research confirmed that more than 99%of Cu and Zn was immobilized in bio-retention filter media by struvite application.Water-soluble Cu and Zn concentrations of struvite treated soil were less than 1.83 and 0.86 mg/kg respectively,and these concentrations were significantly lower compared to the total Cu and Zn content of 747.05 mg/kg in the contaminated soil.Application of struvite to Cu-and Zn-contaminated soil resulted in formation of compounds similar to zinc phosphate tetrahydrate(Zn3(PO4)2·4H2O)and amorphous Cu and Zn phases.Struvite was effective in heavy metal remediation in acidic soil regardless of the presence of Ca impurities in struvite and the presence of plant organic acids in soil.Overall,this study revealed that struvite recovered from wastewater treatment plants has potential for use as an amendment for heavy metal remediation in contaminated bio-retention soil.

关键词： Immobilization Struvite Organic acids Heavy metal Contaminated soil Bio-retention

Advances in haemostatic sponges: Characteristics and the underlying mechanisms for rapid haemostasis

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Bioactive Materials 2023年第9期27卷 231-256页

作者： Akriti Nepal Huong D.N.Tran Nam-Trung Nguyen Hang Thu Ta queensland Micro-and Nanotechnology Centre Griffith UniversityNathanQueensland4111Australia Australian Institute for Bioengineering and Nanotechnology University of QueenslandSt LuciaQueensland4072Australia Bioscience Discipline School of Environment and ScienceGriffith UniversityNathanQueensland4111Australia

In traumatized patients, the primary cause of mortality is uncontrollable continuous bleeding and unexpected intraoperative bleeding which is likely to increase the risk of complications and surgical failure. High expansion sponges are effective clinical practice for the treatment of wound bleeding (irregular/deep/narrow) that are caused by capillaries, veins and even arterioles as they possess a high liquid absorption ratio so can absorb blood platelets easily in comparison with traditional haemostasis treatments, which involve compression, ligation, or electrical coagulation etc. When in contact with blood, haemostatic sponges can cause platelet adhesion, aggregation, and thrombosis, preventing blood from flowing out from wounds, triggering the release of coagulation factors, causing the blood to form a stable polymerized fibre protein, forming blood clots, and achieving the goal of wound bleeding control. Haemostatic sponges are found in a variety of shapes and sizes. The aim of this review is to facilitate an overview of recent research around haemostatic sponge materials, products, and technology. This paper reviews the synthesis, properties, and characteristics of haemostatic sponges, together with the haemostasis mechanisms of haemostatic sponges (composite materials), such as chitosan, cellulose, gelatin, starch, graphene oxide, hyaluronic acid, alginate, polyethylene glycol, silk fibroin, synthetic polymers silver nanoparticles, zinc oxide nanoparticles, mesoporous silica nanoparticles, and silica nanoparticles. Also, this paper reviews commercial sponges and their properties. In addition to this, we discuss various in-vitro/in-vivo approaches for the evaluation of the effect of sponges on haemostasis .

关键词： Haemostatic sponge Characteristics Mechanism Haemostasis Nanoparticles

Condensed point defects enhance thermoelectric performance of rare-earth Lu-doped GeTe

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Journal of Materials science & Technology 2023年第20期151卷 227-233页

作者： Wan-Yu Lyu Wei-Di Liu Meng Li Xiao-Lei Shi Min Hong Tianyi Cao Kai Guo Jun Luo Jin Zou Zhi-Gang Chen Centre for Future Materials University of Southern QueenslandSpringfieldQueensland 4300Australia School of Chemistry and Physics Queensland University of TechnologyBrisbaneQueensland 4000Australia Australian Institute for Bioengineering and Nanotechnology The University of QueenslandBrisbaneQueensland 4072Australia School of Physics and Materials science Guangzhou UniversityGuangzhou 510006China School of Materials science and Engineering Shanghai UniversityShanghai 200444China School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQueensland 4072Australia Centre for Microscopy and Microanalysis The University of QueenslandBrisbaneQueensland 4072Australia

Heavy rare-earth element doping can effectively strengthen phonon scattering,suppress the lattice thermal conductivity,and enhance the overall thermoelectric performance of GeTe.However,the large electronegativity difference between rare-earth elements(such as La,Eu,and Gd)and Ge refrains the doping limit of rare-earth elements below 1 mol.%in GeTe.Here,compared with other rare earth elements,Lu was found to have a relatively small radius and electronegativity difference with Ge,which can induce a high doping level in GeTe.The result shows that Lu doping effectively reduces the lattice thermal conductivity from 0.77 W^(−1) m K^(−1) of GeTe to 0.35 W m^(−1) K^(−1) of Ge_(0.98)Lu_(0.02)Te at 673 K,and further induces a high zT value of 1.5 in Ge_(0.98)Lu_(0.02)Te at 673 K.Extra Sb alloying optimizes the carrier concentration from 1.02×10^(21) cm^(−3) of Ge_(0.98)Lu_(0.02)Te to 1.77×10^(20) cm^(−3) of Ge0.90Lu0.02Sb0.08Te,which results in a reasonable power factor of 33.82μW cm^(−1) K^(−2) and a low electrical thermal conductivity of 0.75 W m^(−1) K^(−1) at 673 K in Ge_(0.90)Lu_(0.02)Sb_(0.08)Te.Correspondingly,a peak zT of 1.75 at 673 K and an average zT of 0.92 within the temperature range of 303–723 K are obtained in Ge_(0.9)Lu_(0.02)Sb_(0.08)Te.This study indicates that Lu and Sb co-doping can effectively boost the thermoelectric performance of GeTe-based thermoelectric materials.

关键词： Thermoelectric Rare-earth Thermal conductivity Carrier concentration

Dilution Accelerates Crystallization:A Negative-Order Kinetic Coordination Reaction Induced by the Competitive Interplay of Dissociation and Complexation

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CCS Chemistry 2023年第12期5卷 2845-2854页

作者： Peng Meng Blake J.P.Connolly Ayusha Anand Yuting Wang Paul V.Bernhardt Jingsan Xu School of Chemistry and Physics and Centre for Materials science Queensland University of TechnologyBrisbane 4000Queensland School of Chemistry and Molecular Biosciences University of QueenslandBrisbane 4072Queensland

Chemical reactions in homogenous systems are generally associated with positive-order kinetics;that is,the reaction rate increases with the increased concentration of reactants.In this work,we report a coordination reaction of Cu^(2+)ions,cyanuric acid(CA),and pyridine in aqueous solution which shows negative-order kinetics with respect to the concentration of pyridine.As the pyridine concentration increases,the complexation of CA with pyridine overwhelms its dissociation in water,resulting in the redistribution of CA;that is,CA is sealed in the pyridine phase by forming an unreactive hydrogenbonded complex.As a result,the number of accessible anionic CA for crystallization in water decreases,and thus the crystallization slows down and almost terminates.Further,the crystallization yields two types of crystals with similar structures but disparate colors(red and blue),and the origin is investigated by the ligand field analysis.

关键词： negative-order kinetics dilution-induced reaction pyridine leading to complexation copper cyanurates competitive interplay of multiple interactions

Shape dependent protein-induced stabilization of gold nanoparticles:From a protein corona perspective Special Collection:Distinguished Australian Researchers

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聚集体(英文)

聚集体(英文) 2023年第4期4卷 177-184页

作者： Anastasiia Tukova Yihan Nie Mohammad Tavakkoli Yaraki Ngoc Thanh Tran Jiaqiu Wang Alison Rodger Yuantong Gu Yuling Wang School of Natural sciences Faculty of Science and EngineeringMacquarie UniversitySydneyNew South WalesAustralia School of Mechanical Medical and Process EngineeringQueensland University of Technology(QUT)BrisbaneQueenslandAustralia Centre for Biomedical Technologies Queensland University of Technology(QUT)BrisbaneQueenslandAustralia Centre for Materials science Queensland University of Technology(QUT)BrisbaneQueenslandAustralia

Gold nanoparticles(AuNPs)are promising materials for many bioapplications.However,upon contacting with biological media,AuNPs undergo changes.The interaction with proteins results in the so-called protein corona(PC)around AuNPs,leading to the new bioidentity and optical properties.Understanding the mechanisms of PC formation and its functions can help us to utilise its benefits and avoid its drawbacks.To date,most of the previous works aimed to understand the mechanisms governing PC formation and focused on the spherical nanoparticles,although non-spherical nanoparticles are designed for a wide range of applications in biosensing.In this work,we investigated the differences in PC formation on spherical and anisotropic AuNPs(nanostars in particular)from the joint experimental(extinction spectroscopy,zeta potential and surface-enhanced Raman scattering[SERS])and computational methods(the finite element method and molecular dynamics[MD]simulations).We discovered that protein does not fully cover the surface of anisotropic nanoparticles,leaving SERS hot-spots at the tips and high curvature edges‘available’for analyte binding(no SERS signal after pre-incubation with protein)while providing protein-induced stabilization(indicated by extinction spectroscopy)of the AuNPs by providing a protein layer around the particle’s core.The findings are confirmed from our MD simulations,the adsorption energy significantly decreases with the increased radius of curvature,so that tips(adsorption energy:2762.334 kJ/mol)would be the least preferential binding site compared to core(adsorption energy:11819.263 kJ/mol).These observations will help the development of new nanostructures with improved sensing and targeting ability.

关键词： anisotropic gold nanoparticles molecular dynamics simulation protein corona SERS stability