ORCID Profile
0000-0002-7271-6927
Current Organisations
Iran University of Science and Technology
,
The University of Newcastle
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Chemical Engineering | Chemical Engineering not elsewhere classified | Petroleum and Reservoir Engineering | Interdisciplinary Engineering not elsewhere classified | Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels) | Petroleum and reservoir engineering | Resources engineering and extractive metallurgy | Geomechanics and resources geotechnical engineering | Multiphysics flows (incl. multiphase and reacting flows) | Mineral Processing/Beneficiation | Polymers and Plastics | Resources Engineering and Extractive Metallurgy | Tribology | Materials Engineering | Carbon Sequestration Science | Interdisciplinary Engineering | Composite and Hybrid Materials |
ANZSRC Socio-Economic Objective (SEO)
First Stage Treatment of Ores and Minerals not elsewhere classified | Oil and Gas Extraction | Energy Storage, Distribution and Supply not elsewhere classified | Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation) | Solar-Thermal Energy | Plastic Products (incl. Construction Materials) | Mining Machinery and Equipment | Concentrating Processes of Base Metal Ores (excl. Aluminium and Iron Ores)
Related Links
Publications
Review of foam fractionation as a water treatment technology
Publisher: Informa UK Limited
Date: 18-07-2021
Thinking about the school most of the time: studio as generative metaphor for critical reflection
Publisher: Informa UK Limited
Date: 26-10-2018
A quantitative review of the transition salt concentration for inhibiting bubble coalescence
Publisher: Elsevier BV
Date: 08-2015
DOI: 10.1016/J.CIS.2014.07.005
Abstract: Some salts have been proven to inhibit bubble coalescence above a certain concentration called the transition concentration. The transition concentration of salts has been investigated and determined by using different techniques. Different mechanisms have also been proposed to explain the stabilizing effect of salts on bubble coalescence. However, as yet there is no consensus on a mechanism which can explain the stabilizing effect of all inhibiting salts. This paper critically reviews the experimental techniques and mechanisms for the coalescence of bubbles in saline solutions. The transition concentrations of NaCl, as the most popularly used salt, determined by using different techniques such as bubble swarm, bubble pairs, and thin liquid film micro-interferometry were analyzed and compared. For a consistent comparison, the concept of TC95 was defined as a salt concentration at which the "percentage coalescence" of bubbles reduces by 95% relative to the highest (100% in pure water) and lowest (in high-salt concentration) levels. The results show a linear relationship between the TC95 of NaCl and the reciprocal of the square root of the bubble radius. This relationship holds despite different experimental techniques, salt purities and bubble approach speeds, and highlights the importance of the bubble size in bubble coalescence. The available theoretical models for inhibiting effect of salts have also been reviewed. The failure of these models in predicting the salt transition concentration commands further theoretical development for a better understanding of bubble coalescence in salt solutions.
Schools and Cultural Citizenship
Publisher: Routledge
Date: 28-11-2022
Comparison of flow dynamics of air-water flows with foam flows in vertical pipes
Publisher: Elsevier BV
Date: 11-2020
Phosphorylated human galectin-3: Facile large-scale preparation of active lectin and detection of structural changes by CD spectroscopy
Publisher: Elsevier BV
Date: 04-2008
DOI: 10.1016/J.BBAGEN.2008.01.018
Abstract: Galectin-3 has a unique modular design. Its short N-terminal stretch can be phosphorylated, relevant for nuclear export and anti-anoikis/apoptosis activity. Enzymatic modification by casein kinase 1 at constant ATP concentration yielded mg quantities of mono- and diphosphorylated derivatives at Ser5/Ser11 in a 2:1 ratio. Their carbohydrate-inhibitable binding to asialofetuin, cell surfaces of three tumor lines, rabbit erythrocytes leading to haemagglutination and cytoplasmic sites in fixed tissue sections was not markedly altered relative to phosphate-free galectin-3. Spectroscopically, phosphorylation induced alterations in the far UV CD, indicative of an increase in ordered structure. This is accompanied by changes in the environment of aromatic amino acids signified by shifts in the near UV CD.
Quote and cite wisely
Publisher: Routledge
Date: 09-11-2022
Spontaneous Imbibition Experiments of Enhanced Oil Recovery with Surfactants and Complex Nano-Fluids
Publisher: Wiley
Date: 28-01-2017
A review on determination of particle–bubble encounter using analytical, experimental and numerical methods
Publisher: Elsevier BV
Date: 06-2018
Exact solution of two phase stratified flow through the pipes for non-Newtonian Herschel-Bulkley fluids
Publisher: Elsevier BV
Date: 08-2009
Investigating the Effect of Salinity on Counter-Current Two-Phase Flow Regimes in Annuli
Publisher: Unconventional Resources Technology Conference
Date: 2019
Afterword: Tests and checklists
Publisher: Routledge
Date: 09-11-2022
Single-Site Cys-Substituting Mutation of Human Lectin Galectin-2: Modulating Solubility in Recombinant Production, Reducing Long-Term Aggregation, and Enabling Site-Specific MonoPEGylation
Publisher: American Chemical Society (ACS)
Date: 23-10-2008
DOI: 10.1021/BM800801B
Abstract: The effector capacity of endogenous lectins on cell adhesion/growth prompts studies to turn them into pharmaceutically stable forms. Using human galectin-2 as a proof-of-principle model, we first introduced mutations at the site of one of the two Cys residues, that is, C57A, C57M, and C57S. Only the C57M variant was expressed in bacteria in soluble form in high yield. No notable aggregation of the modified homodimeric lectin occurred during 3 weeks of storage. This mutational process also facilitated the site-directed introduction of poly(ethylene glycol) into the remaining sulfhydryl group (Cys75). Product analysis revealed rather complete conjugation with one chain per subunit in the homodimer. We note that neither the secondary structure alteration nor the absence of binding ability to a glycoprotein (asialofetuin) was observed. The results thus document the feasibility of tailoring a human galectin for enhanced stability to aggregation as well as monoPEGylation, which enables further testing of biological properties including functionality as growth regulator and the rate of serum clearance.
Prediction of Slug Frequency for Medium Liquid Viscosity Two-Phase Flow in Vertical, Horizontal, and Inclined Pipes
Publisher: Society of Petroleum Engineers (SPE)
Date: 16-07-2020
DOI: 10.2118/202473-PA
Abstract: Several experimental studies have been conducted to investigate the effect of liquid viscosity on slug frequency in horizontal, vertical, and inclined two-phase flows. Analyses of these studies reveal that the slug frequency is positively related to superficial liquid velocity and liquid viscosity the superficial gas velocity has a dual minor effect on slug frequency, with an initial increase for low superficial gas velocity and then a decrease for high superficial gas velocity and the slug frequency increases with increasing flow deviation from horizontal. Also, the analyses reveal that for inclined viscous flow, the slug frequency and slug length follow the same inverse relationship shown in horizontal and vertical slug flows. In the literature, several models have been developed for predicting slug frequency in viscous horizontal flows, whereas only a few models exist for viscous vertical and inclined flows. In this study, we aim to develop models for prediction of slug frequency in two-phase flow of medium liquid viscosity (30 ≤ μL ≤ 250 mPa·s). Dimensional analysis of four published experimental data sets (218 data points) indicates that slug frequency is related to two dimensionless numbers namely, a modified Froude number and inverse viscosity number. As a result, three slug frequency closure models are proposed for vertical, horizontal, and inclined flows, using a combination of these two numbers. The proposed models are tested against the four data sets, and very good results are obtained, with correlation coefficients ranging from 0.96 to 0.97.
Peptides As Functional Surfactants
Publisher: American Chemical Society (ACS)
Date: 21-05-2008
DOI: 10.1021/IE800127F
The pedagogical logics of arts-rich schools: a Bourdieusian analysis
Publisher: Informa UK Limited
Date: 10-01-2019
Failure modes for hydrated bentonite plugs used in well decommissioning operations
Publisher: Elsevier BV
Date: 2020
The suitability of the dimensionless terms used in correlating slug liquid holdup with flow parameters in viscous two-phase flows
Publisher: Elsevier BV
Date: 11-2019
Complementing the mainstream: an exploration of partnership work between complementary alternative provisions and mainstream schools
Publisher: Informa UK Limited
Date: 23-03-2016
Check your idiosyncrasies
Publisher: Routledge
Date: 09-11-2022
Intrinsic fluorescence as an analytical probe of virus-like particle assembly and maturation
Publisher: Elsevier BV
Date: 10-2008
DOI: 10.1016/J.BBRC.2008.08.019
Abstract: The assembly and maturation of the human papillomavirus (HPV) virus-like particle (VLP) has been monitored by measuring the intrinsic fluorescence intensity using excitation at 290nm and emission at 350nm. The assay was validated to eliminate error due to photo-bleaching, adsorption, and precipitation. Intrinsic fluorescence intensity dropped during both assembly and maturation phases. The decrease during assembly had a second-order dependence on capsomere concentration, as previously observed using light scattering. During post-assembly structural modification the decrease had a first-order dependence on capsomere concentration. Intrinsic fluorescence spectroscopy complements light scattering methodologies for monitoring assembly and enables kinetics of maturation to be observed. The role of environmental factors such as the presence of oxidized glutathione in facilitation of faster and more complete maturation was monitored in real time. Intrinsic fluorescence is a rugged methodology that could be applied to monitoring VLP assembly and maturation unit operations during HPV vaccine manufacturing.
Effects of monovalent anions and cations on drainage and lifetime of foam films at different interface approach speeds
Publisher: Elsevier BV
Date: 07-2014
Developing new mechanistic models for predicting pressure gradient in coal bed methane wells
Publisher: Elsevier BV
Date: 07-2016
Characteristics of counter-current gas-liquid two-phase flow and its limitations in vertical annuli
Publisher: Elsevier BV
Date: 12-2019
Creativity in teaching: what can teachers learn from artists?
Publisher: Informa UK Limited
Date: 19-02-2016
Analytical solution for Newtonian laminar flow through the concave and convex ducts
Publisher: ASME International
Date: 14-08-2009
DOI: 10.1115/1.3184026
Abstract: In this paper, the motion equation for steady state, laminar, fully developed flow of Newtonian fluid through the concave and convex ducts has been solved both numerically and analytically. These cross sections can be formed due to the sedimentation of heavy components such as sand, wax, debris, and corrosion products in pipe flows. The influence of duct cross section on dimensionless velocity profile, dimensionless pressure drop, and friction factor has been reported. Finally based on the analytical solutions three new correlations have been proposed for the product of Reynolds number and Fanning friction factor (Cf Re) for these geometries.
Use of pressure signal analysis to characterise counter-current two-phase flow regimes in annuli
Publisher: Elsevier BV
Date: 2020
Beyond records and representations: inbetween writing in educational ethnography
Publisher: Informa UK Limited
Date: 07-10-2015
The trust deficit in England: emerging research evidence about school leaders and the pandemic
Publisher: Informa UK Limited
Date: 13-09-2021
Cultural capitals matter, differentially: a Bourdieusian reading of perspectives from senior secondary students in England
Publisher: Informa UK Limited
Date: 06-06-2022
Making the Most of School Arts Education Partnerships
Publisher: Springer Science and Business Media LLC
Date: 04-2021
The chromatography-free release, isolation and purification of recombinant peptide for fibril self-assembly
Publisher: Wiley
Date: 12-2009
DOI: 10.1002/BIT.22447
Abstract: One of the major expenses associated with recombinant peptide production is the use of chromatography in the isolation and purification stages of a bioprocess. Here we report a chromatography-free isolation and purification process for recombinant peptide expressed in Escherichia coli (E. coli). Initial peptide release is by homogenization and then by enzymatic cleavage of the peptide-containing fusion protein, directly in the E. coli homogenate. Release is followed by selective solvent precipitation (SSP) to isolate and purify the peptide away from larger cell contaminants. Specifically, we expressed in E. coli the self-assembling beta-sheet forming peptide P(11)-2 in fusion to thioredoxin. Homogenate was heat treated (55 degrees C, 15 min) and then incubated with tobacco etch virus protease (TEVp) to release P(11)-2 having a native N-terminus. SSP with ethanol at room temperature then removed contaminating proteins in an integrated isolation-purification step it proved necessary to add 250 mM NaCl to homogenate to prevent P(11)-2 from partitioning to the precipitate. This process structure gave recombinant P(11)-2 peptide at 97% polypeptide purity and 40% overall yield, without a single chromatography step. Following buffer-exchange of the 97% pure product by bind-elute chromatography into defined chemical conditions, the resulting peptide was shown to be functionally active and able to form self-assembled fibrils. To the best of our knowledge, this manuscript reports the first published process for chromatography-free recombinant peptide release, isolation and purification. The process proved able to deliver functional recombinant peptide at high purity and potentially low cost, opening cost-sensitive materials applications for peptide-based materials.
Alternative programmes, alternative schools and social justice
Publisher: Informa UK Limited
Date: 02-01-2016
‘You just feel more relaxed’: An Investigation of Art Room Atmosphere
Publisher: Wiley
Date: 08-2021
DOI: 10.1111/JADE.12370
Abstract: Art educators are increasingly interested in the affective dimensions of pedagogy. This article explores students’ reports of feeling more relaxed and less stressed in the art room, data drawn from a three‐year study of thirty arts‐rich secondary schools. Drawing on recent scholarship on affect, we suggest that these feelings were in part the result of ‘atmosphere’ – mobile bodies in (1) a curated space, engaged with educational activities associated with (2) a signature text and pedagogy, enacted as an (3) isorhythmic practice. We suggest that these three elements of atmosphere not only help us to understand how to produce positive feelings about art, but they also have some potential for use in professional reflection on practice.
Introducing the Tracking Arts Learning and Engagement research
Publisher: Routledge
Date: 28-11-2022
Immersive professional development
Publisher: Routledge
Date: 28-11-2022
Novel methodology for predicting the critical salt concentration of bubble coalescence inhibition
Publisher: American Chemical Society (ACS)
Date: 03-01-2014
DOI: 10.1021/JP409473G
On the effect of van der Waals attractions on the critical salt concentration for inhibiting bubble coalescence
Publisher: Elsevier BV
Date: 04-2014
Signature arts pedagogies
Publisher: Routledge
Date: 28-11-2022
The arts-broker teacher
Publisher: Routledge
Date: 28-11-2022
Mixed System of Eudragit S-100 with a Designed Amphipathic Peptide: Control of Interfacial Elasticity by Solution Composition
Publisher: American Chemical Society (ACS)
Date: 15-02-2008
DOI: 10.1021/LA703252R
Abstract: We report an interfacially active system based on an informational peptide surfactant mixed with an oppositely charged polyelectrolyte. The 21-residue cationic peptide, AM1, has previously been shown to respond reversibly to pH and metal ions at fluid interfaces, forming elastic films that can be rapidly switched to collapse foams or emulsions on demand. Here we report the reversible association of AM1 with the methacrylate-based anionic polymer Eudragit S-100. The strength of the association, in bulk aqueous solution, is modulated by added metal ions and by ionic strength. Addition of zinc ions to the peptide-polymer system promotes complex formation and phase separation, while addition of a chelating agent reverses the association. The addition of salt weakens peptide-polymer interactions in the presence or absence of zinc. At the air-water interface, Eudragit S-100 forms an elastic mixed film with AM1 in the absence of metal, under conditions where the peptide alone does not show interfacial elasticity. When zinc is present, the elasticity of the mixed film is increased, but the rate of interfacial adsorption slows due to formation of peptide-polymer complexes in bulk solution. An understanding of these interactions can be used to identify favorable foam-forming conditions in the mixed system.
Plugging CSG wells with bentonite: Review and preliminary lab results
Publisher: SPE
Date: 09-11-2015
DOI: 10.2118/176987-MS
Abstract: Oil and gas wells are required to be plugged when the production of these wells is no longer economical. Cement is the current standard method for plugging wells. However, this process has limitations because cement is expensive and prone to cracking and unsealing. This paper aims to review and investigate the use of a naturally occurring clay called bentonite to plug CSG wells in Queensland as well as oil and gas wells in general. Bentonite is cheaper and easier to handle and when hydrated it creates a more reliable plug because it is malleable and self-healing when disturbed. We also experimentally and theoretically investigate the mechanisms for failure of bentonite plugs. The plug failure mechanisms can be determined by comparing the measured dislodgement pressure and the predictions of the theory developed in our group. Based on our preliminary results we found that the hydrated plugs can be made significantly stronger by restricting the expansion space. This allowed us to measure the internal swelling pressure at 8 MPa which corresponded to measurements reported in the literature at a reduced density of 1.6755 g/cm3.
Australia's world scale gas resources, its markets and why new approaches are required
Publisher: SPE
Date: 23-10-2018
DOI: 10.2118/191895-MS
Abstract: Australia is uniquely positioned globally as a major energy provider, but this comes with multiple challenges that must be overcome to realize its full potential. LNG developments that are nearing fruition are set to make Australia the largest supplier of LNG in the world. The Asian LNG market continues to be the growth market. The development of the world's first coal bed methane (coal seam gas) to LNG projects on the east coast has created a robust east coast LNG export market, which in the near future is expected to coincide with domestic energy shortages arising from low exploration activity, maturing fields, higher costs, the interaction of government policy, commercial decisions and activism. As a result, unique approaches to project management and community relations have been developed that are complementary to the Australian consumer's needs for reliable, affordable and cleaner energy. The east coast demand for gas is likely to trigger new development of onshore Northern Territory gas in the short term, if political opposition can be managed. In Western Australia, new approaches leverage technologies such as floating LNG, and more utilization of existing infrastructure and plant capacity to achieve lower costs. This paper outlines Australia's natural gas supply & demand and the challenges to be faced in the coming years.
High-level expression of soluble viral structural protein in Escherichia coli
Publisher: Elsevier BV
Date: 20-03-2008
DOI: 10.1016/J.JBIOTEC.2007.12.004
Abstract: Pharmaceutically relevant virus-like particles (VLPs) can potentially be manufactured cheaply and efficiently through in vitro assembly of viral structural protein in cell-free reactors, but a bottleneck for this processing route is the currently low-level expression of soluble viral protein in efficient cell factories such as Escherichia coli (E. coli). Here, we report expression levels of up to 180 mg L(-1) that are achievable from low-cell-density E. coli cultures using a simple and low cost strategy. We investigated effects of host strain, plasmid, inducer concentration, pre-induction temperature and cell density at induction with design of experiment (DOE). The statistical approach successfully identified significant effects and their interactions, and provided insights into the role of codon-usage effects in expression of viral structural protein. In particular, our results support the notion that full codon optimization may be unnecessary to improve expression of viral genes rich in E. coli rare codons using a strategically modified host cell could provide a simpler and cheaper alternative.
Mitigating the failure of downhole pumps due to gas interference in coal seam gas wells
Publisher: SPE
Date: 23-10-2018
DOI: 10.2118/191910-MS
Abstract: Coal seam gas (CSG) well operators typically follow an industry rule of thumb 0.5 ft/s liquid velocity to prevent the onset of gas carryover during CSG dewatering operations. However, there is very little experimental data to validate this rule of thumb with only a publication by Sutton, Christiansen, Skinner and Wilson [1] available in the open literature. A review of more general studies on two-phase gas-water flows in vertical pipes and annuli revealed that experimental conditions, especially pipe and annuli diameters, can have a significant impact on development of two-phase flow phenomena. As such, the limited available data may not be applicable due to differences in experimental conditions. This study experimentally investigates the onset of gas carryover using an experimental setup intended specifically for the study of CSG wells. The University of Queensland Well Simulation Flow Facilities were designed to replicate as closely as possible the production zone of a typical vertical CSG well in Queensland, Australia in transparent acrylic pipes to observe two-phase flow behavior in simulated downhole conditions. The annular test section in the rig was constructed of a 7-in casing and 2¾-in tubing. Modification of the experimental setup to include a vertical separator allowed for the detection of gas carryover. Conceptual demonstrations of gas carryover were captured and have been illustrated. The experiments in this study validate the industry rule of thumb of 0.5 ft/s liquid velocity as an appropriate guideline for onset of gas carryover in a casing-tubing annulus dimension similar to a typical CSG well in Queensland.
Strengthen your argument
Publisher: Routledge
Date: 09-11-2022
Effect of different co-foaming agents on PFAS removal from the environment by foam fractionation
Publisher: Elsevier BV
Date: 02-2023
Make your text trustworthy
Publisher: Routledge
Date: 09-11-2022
The Gibbs-Marangoni stress and nonDLVO forces are equally important for modeling bubble coalescence in salt solutions
Publisher: Elsevier BV
Date: 02-2017
Dynamics of interfacial layers for sodium dodecylbenzene sulfonate solutions at different salinities
Publisher: Elsevier BV
Date: 12-2020
Tuneable control of interfacial rheology and emulsion coalescence
Publisher: Wiley
Date: 23-03-2009
Abstract: Breaking point: Switchable peptide surfactants are used to demonstrate that the extent of cross-linking in an interfacial surfactant layer can control the rate of emulsion coalescence. Pictured is the rupture of an aqueous thin film where the peptide layer lacks sufficient strength to prevent hole formation, but nonetheless dramatically slows the rate of hole expansion.
Terahertz time-domain spectroscopy of peptides in solution
Publisher: IEEE
Date: 09-2009
Subject Choice As Everyday Accommodation /Resistance: Why Students In England (Still) Choose The Arts
Publisher: Informa UK Limited
Date: 24-10-2018
An overview of the coal seam gas developments in Queensland
Publisher: Elsevier BV
Date: 04-2016
Surface force at the nano-scale: observation of non-monotonic surface tension and disjoining pressure
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP03050A
Abstract: The disjoining pressures of thin aqueous salt films at different salt concentrations and temperatures were calculated using MD simulations.
Disciplinary regimes of ‘care’ and complementary alternative education
Publisher: Informa UK Limited
Date: 04-12-2015
Hugs and behaviour points: Alternative education and the regulation of ‘excluded’ youth
Publisher: Informa UK Limited
Date: 30-10-2015
Analytical solution for Newtonian-Bingham plastic two-phase pressure driven stratified flow through the circular ducts
Publisher: Elsevier BV
Date: 05-2008
Collision and attachment interactions of single air bubbles with flat surfaces in aqueous solutions
Publisher: CRC Press
Date: 19-04-2013
DOI: 10.1201/B13247
Effect of selected monovalent salts on surfactant stabilized foams
Publisher: Elsevier BV
Date: 09-2021
Encapsulation of DNA and non-viral protein changes the structure of murine polyomavirus virus-like particles
Publisher: Springer Science and Business Media LLC
Date: 11-2008
DOI: 10.1007/S00705-008-0220-9
Abstract: Asymmetrical-flow field flow fractionation with multiple-angle light scattering (AFFFF-MALS) was, for the first time, used to characterize the size of murine polyomavirus virus-like particles (MPV VLPs) packaged with either insect cell genomic DNA or non-viral protein. Encapsidation of both genomic DNA and non-viral protein were found to cause a contraction in VLP radii of gyration by approximately 1 nm. Non-viral protein packaged into VLPs consisted of a series of glutathione-S-transferase, His and S tags attached to the N-terminal end of the MPV structural protein VP2 (M(r) = 67108). Transmission electron microscopy analysis of MPV VLPs packaging non-viral protein suggested that VLPs grew in diameter by approximately 5 nm, highlighting the differences between this invasive technique and the relatively non-invasive AFFFF-MALS technique. Encapsulation of non-viral protein into MPV VLPs was found to prevent co-encapsidation of genomic DNA. Further investigation into why this occurred led to the discovery that encapsulation of non-viral protein alters the nuclear localization of MPV VLPs during in vivo assembly. VLPs were relocated away from the ring zone and the nuclear membrane towards the centre of the nucleus amongst the virogenic stroma. The change in nuclear localization away from the site where VLP assembly usually occurs is a likely reason why encapsidation of genomic DNA did not take place.
The effect of microhydrodynamics on bubble-particle collision interaction
Publisher: Elsevier BV
Date: 08-2011
Australia's gas resources and its new approaches
Publisher: Elsevier BV
Date: 12-2019
Subcellular compartment targeting of layered double hydroxide nanoparticles
Publisher: Elsevier BV
Date: 08-2008
DOI: 10.1016/J.JCONREL.2008.05.021
Abstract: Current investigations show that layered double hydroxide (LDH) nanoparticles have high potential as effective non-viral agents for cellular drug delivery due to their low cytotoxicity, good biocompatibility, high drug loading, control of particle size and shape, targeted delivery and drug release control. Two types of Mg(2)Al-LDH nanoparticles with fluorescein isothiocyanate (FITC) were controllably prepared. One is morphologically featured as typical hexagonal sheets (50-150 nm laterally wide and 10-20 nm thick), while the other as typical rods (30-60 nm wide and 100-200 nm long). These LDH(FTIC) nanoparticles are observed to immediately transfect into different mammalian cell lines. We found that internalized LDH(FITC) nanorods are quickly translocated into the nucleus while internalized LDH(FITC) nanosheets are retained in the cytoplasm. Inhibition experiments show that the cellular uptake is a clathrin-mediated time- and concentration-dependent endocytosis. Endosomal escape of LDH(FITC) nanoparticles is suggested to occur through the deacidification of LDH nanoparticles. Since quick nuclear targeting of LDH(FITC) nanorods requires an active process, and although the exact mechanism is yet to be fully understood, it probably involves an active transport via microtubule-mediated trafficking processes. Targeted addressing of two major subcellular compartments by simply controlling the particle morphology/size could find a number of applications in cellular biomedicine.
Development and Evaluation of Multiphase Closure Models used in the Simulation of Unconventional Wellbore Dynamics
Publisher: Unconventional Resources Technology Conference
Date: 2019
Mechanistic modelling of counter-current slug flows in vertical annuli
Publisher: SPE
Date: 09-11-2015
DOI: 10.2118/176885-MS
Abstract: A range of mathematical models and correlations is used to estimate the pressure drop for co-current two-phase flows in vertical wells in the conventional oil and gas industry. However, in the annulus between casing and tubing of a coal seam gas (CSG) well, the upward flow of gas and downward flow of water results in counter-current two-phase flows. The flow regimes developed in such a counter-current system are noticeably different to co-current flow regimes, and thus the existing models used to predict pressure profiles in co-current wells do not adequately describe two phase flows in a (pumped) CSG well. In this study, we modified existing mechanistic models for co-current flow and counter-current flow in a pipe to predict liquid holdup and pressure profiles of counter-current flows in vertical annuli for the slug flow, which is the dominant flow regime. A model, based on the work of Taitel and Barnea (1983), was also developed to predict the transition from slug flow to annular flow in counter-current flows in annuli. Our comparison of the pressure profiles of co-current and counter-current flows in annuli for the slug flow regime indicates that the pressure loss of counter-current flows could be appreciably different to that in co-current flows under the same conditions. This highlights the need to modify the models that are currently applied in typical commercial well flow simulators to better predict the pressure drop across CSG wells.
Field trials of plugging oil and gas wells with hydrated bentonite
Publisher: SPE
Date: 25-10-2016
DOI: 10.2118/182199-MS
Abstract: Many field trials have been conducted to explore the effectiveness of using hydrated bentonite as a sealing material for plugging and abandoning (P& A) operations of oil and gas wells. Many of those trials are reviewed here, including trials in Texas, New Mexico, Oklahoma, Wyoming and Queensland, most of which have not been previously reported. All of these trials have been successful, even though a few wells have been eliminated from the programs because they were found to be unsuitable. In most jurisdictions regulation changes are necessary to allow bentonite to be used in order to plug wells. This has been done in California, Texas and Oklahoma. In Wyoming it is currently permitted as the bottom plug in coal-bed methane wells. In Queensland a field trial has been allowed under the experimental materials clause in the regulations.
Salt effects on the dilational viscoelasticity of surfactant adsorption layers
Publisher: Elsevier BV
Date: 02-2022
Harvesting Recombinant Protein Inclusion Bodies
Publisher: Wiley
Date: 24-09-1998
Effect of Divalent and Monovalent Salts on Interfacial Dilational Rheology of Sodium Dodecylbenzene Sulfonate Solutions
Publisher: MDPI AG
Date: 19-07-2022
Abstract: This study presents the equilibrium surface tension (ST), critical micelle concentration (CMC) and the dilational viscoelasticity of sodium dodecylbenzene sulfonate (SDBS)-adsorbed layers in the presence of NaCl, KCl, LiCl, CaCl2 and MgCl2 at 0.001–0.1 M salt concentration. The ST and surface dilational viscoelasticity were determined using bubble-shape analysis technique. To capture the complete profile of dilational viscoelastic properties of SDBS-adsorbed layers, experiments were conducted within a wide range of SDBS concentrations at a fixed oscillating frequency of 0.01 Hz. Salts were found to lower the ST and induce micellar formation at all concentrations. However, the addition of salts increased dilational viscoelastic modulus only at a certain range of SDBS concentration (below 0.01–0.02 mM SDBS). Above this concentration range, salts decreased dilational viscoelasticity due to the domination of the induced molecular exchange d ening the ST gradient. The dilational viscoelasticity of the salts of interest were in the order CaCl2 MgCl2 KCl NaCl LiCl. The charge density of ions was found as the corresponding factor for the higher impact of alent ions compared to monovalent ions, while the impact of monovalent ions was assigned to the degree of matching in water affinities, and thereby the tendency for ion-pairing between SDBS head groups and monovalent ions.
The Release of Intracellular Bioproducts
Publisher: Wiley
Date: 24-09-1998
Dispersion-enhanced chromatography refolding of denatured protein
Publisher: Elsevier BV
Date: 09-2008
On the stability of thin films of pure water
Publisher: Elsevier BV
Date: 06-2019
DOI: 10.1016/J.CIS.2019.03.005
Abstract: The stability of water films has been the focus of many researchers in the recent decades. Unfortunately, there is no consensus on the stability of these foam films or on the mechanisms responsible for stabilizing water films. This paper examines the reported results on this matter and scrutinizes them based on speciation analysis of the dissolved species and the recent achievements in the adsorption of inorganic ions on the air/water interface. Our results confirm the key role of surface contamination, interface approach velocity and evaporation in the drainage and lifetime of these water films. It confirms the stabilizing effect of contamination and the destabilizing effect of air-water interface approach velocity. Moreover, the negative sign of the surface/zeta potential of the air/water interface and its dependence on the pH value were explained.
Prediction of the Flowing Bottom-Hole Pressure Using Advanced Data Analytics
Publisher: Unconventional Resources Technology Conference
Date: 2019
Evaluation of interfacial properties of concentrated KCl solutions by molecular dynamics simulation
Publisher: Elsevier BV
Date: 02-2018
Changing Play – writing, researching and learning in an early years arts project
Publisher: Informa UK Limited
Date: 15-02-2019
Drainage and stability of foam films during bubble coalescence in aqueous salt solutions
Publisher: University of Queensland Library
Date: 2014
DOI: 10.14264/UQL.2015.53
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Iran University Of Science And Technology
Location: Iran (Islamic Republic of)
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End Date: 2020
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE230100129
Start Date: 2023
End Date: 12-2023
Amount: $1,929,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP170100659
Start Date: 01-2019
End Date: 06-2023
Amount: $228,838.00
Funder: Australian Research Council
View Funded ActivityLinkage Projects - Grant ID: LP190100191
Start Date: 11-2020
End Date: 12-2024
Amount: $480,295.00
Funder: Australian Research Council
View Funded ActivityDiscovery Projects - Grant ID: DP210102531
Start Date: 03-2021
End Date: 02-2024
Amount: $400,000.00
Funder: Australian Research Council
View Funded ActivityLinkage Infrastructure, Equipment And Facilities - Grant ID: LE200100220
Start Date: 07-2020
End Date: 02-2022
Amount: $760,000.00
Funder: Australian Research Council
View Funded ActivityARC Centres Of Excellence - Grant ID: CE200100009
Start Date: 07-2020
End Date: 07-2027
Amount: $35,000,000.00
Funder: Australian Research Council
View Funded Activity