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  • 2015-2019  (479)
  • 1995-1999  (30)
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  • 1
    Publication Date: 2019
    Description: The reinforced concrete structures that support transport, energy and urban networks in developed countries are over half a century old, and are facing widespread deterioration. Geopolymers are an affordable class of materials that have promising applications in concrete structure coating, rehabilitation and sensing, due to their high chloride, sulphate, fire and freeze-thaw resistances and electrolytic conductivity. Work to date has, however, mainly focused on geopolymers that require curing at elevated temperatures, and this limits their ease of use in the field, particularly in cooler climates. Here, we outline a design process for fabricating ambient-cured fly ash geopolymer coatings for concrete substrates. Our technique is distinct from previous work as it requires no additional manufacturing steps or additives, both of which can bear significant costs. Our coatings were tested at varying humidities, and the impacts of mixing and application methods on coating integrity were compared using a combination of calorimetry, x-ray diffraction and image-processing techniques. This work could allow geopolymer coatings to become a more ubiquitous technique for updating ageing concrete infrastructure so that it can meet modern expectations of safety, and shifting requirements due to climate change.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI
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  • 2
  • 3
    Publication Date: 2016-06-02
    Description: Nature Geoscience 9, 464 (2016). doi:10.1038/ngeo2700 Authors: R. E. Ernst, M. A. Hamilton, U. Söderlund, J. A. Hanes, D. P. Gladkochub, A. V. Okrugin, T. Kolotilina, A. S. Mekhonoshin, W. Bleeker, A. N. LeCheminant, K. L. Buchan, K. R. Chamberlain & A. N. Didenko
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
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  • 4
    Publication Date: 2015-09-19
    Description: The analysis of neutron diffraction experiments often assumes that neutrons are elastically scattered from the sample. However, there is growing evidence that a significant fraction of the detected neutrons is in fact inelastically scattered, especially from soft materials and aqueous samples. Ignoring these inelastic contributions gives rise to inaccurate experimental results. To date, there has been no simple method with broad applicability for inelastic signal separation in neutron diffraction experiments. Here, we present a simple and robust method that we believe could be suited for this purpose. We use two radio frequency resonant spin flippers integrated with a Larmor precession field to modulate the neutron intensity and to encode the inelastic scattering information into the neutron data. All three components contribute to the spin encoding. The Larmor field serves several additional purposes. Its usage facilitates neutron time-focusing, eliminates the need for stringent magnetic shielding, and allows for compact setups. The scheme is robust, simple, and flexible. We believe that, with further improvements, it has the potential of adding inelastic signal discrimination capabilities to many existing diffraction instruments in the future.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
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  • 5
    Publication Date: 2016-02-27
    Description: Anthropogenic carbon dioxide (CO 2 ) emissions simultaneously increase ocean temperatures and reduce ocean surface pH, a process termed ocean acidification (OA). OA is expected to negatively affect the growth and physiology of many calcified organisms, but the response of non-calcified (fleshy) organisms is less well understood. Rising temperatures and p CO 2 can enhance photosynthetic rates (within tolerance limits). Therefore, warming may interact with OA to alter biological responses of macroalgae in complicated ways. Beyond thresholds of physiological tolerance, however, rising temperatures could further exacerbate negative responses to OA. Many studies have investigated the effects of OA or warming independently of each other, but few studies have quantified the interactive effects of OA and warming on marine organisms. We conducted four short-term independent factorial CO 2 enrichment and warming experiments on six common species of calcified and fleshy macroalgae from southern California to investigate the independent and interactive effects of CO 2 and warming on growth, carbonic anhydrase (CA) enzyme activity, pigment concentrations, and photosynthetic efficiency. There was no effect of elevated p CO 2 on CA activity, pigment concentration, and photosynthetic efficiency in the macroalgal species studies. However, we found that calcareous algae suffered reduced growth rates under high p CO 2 conditions alone, although the magnitude of the effect varied by species. Fleshy algae had mixed responses of growth rates to high p CO 2 , indicating that the effects of p CO 2 enrichment are inconsistent across species. The combined effects of elevated p CO 2 and warming had a significantly negative impact on growth for both fleshy and calcareous algae; calcareous algae experienced five times more weight loss than specimens in ambient control conditions and fleshy growth was reduced by 76%. Our results demonstrate the need to study the interactive effects of multiple stressors associated with global change on marine communities.
    Print ISSN: 1054-3139
    Electronic ISSN: 1095-9289
    Topics: Biology , Geosciences , Physics
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  • 6
    Publication Date: 2016-02-27
    Description: We present a tentative detection of the large-scale structure of Ly α emission in the Universe at redshifts z = 2–3.5 by measuring the cross-correlation of Ly α surface brightness with quasars in Sloan Digital Sky Survey/Baryon Oscillation Spectroscopic Survey. We use a million spectra targeting luminous red galaxies at z 〈 0.8, after subtracting a best-fitting model galaxy spectrum from each one, as an estimate of the high-redshift Ly α surface brightness. The quasar–Ly α emission cross-correlation is detected on scales 1 ~ 15 h –1 Mpc, with shape consistent with a CDM model with $\Omega _{\rm m} =0.30^{+0.10}_{-0.07}$ . The predicted amplitude of this cross-correlation is proportional to the product of the mean Ly α surface brightness, 〈μ α 〉, the amplitude of mass fluctuations and the quasar and Ly α emission bias factors. We infer 〈μ α 〉 ( b α /3) = (3.9 ± 0.9) x 10 –21 erg s –1  cm –2 Å –1  arcsec –2 , where b α is the Ly α emission bias. If star-forming galaxies dominate this emission, we find SFR = (0.28 ± 0.07)(3/ b α ) yr –1  Mpc –3 . For b α = 3, this value is ~30 times larger than previous estimates from individually detected Ly α emitters, but consistent with the total SFR derived from dust-corrected, continuum UV galaxy surveys, if most of the Ly α photons from these galaxies avoid dust absorption and are reemitted after diffusing in large gas haloes. Heating of intergalactic gas by He ii photoionization from quasar radiation or jets may alternatively explain the detected correlation, and cooling radiation from gas in galactic haloes may also contribute. We also detect redshift space anisotropy of the quasar–Ly α emission cross-correlation, finding evidence at the 3.0 level that it is radially elongated, which may be explained by radiative-transfer effects. Our measurements represent the first application of the intensity mapping technique to optical observations.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
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  • 7
  • 8
    Publication Date: 2015-10-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patch, Ann-Marie -- Christie, Elizabeth L -- Etemadmoghadam, Dariush -- Garsed, Dale W -- George, Joshy -- Fereday, Sian -- Nones, Katia -- Cowin, Prue -- Alsop, Kathryn -- Bailey, Peter J -- Kassahn, Karin S -- Newell, Felicity -- Quinn, Michael C J -- Kazakoff, Stephen -- Quek, Kelly -- Wilhelm-Benartzi, Charlotte -- Curry, Ed -- Leong, Huei San -- Australian Ovarian Cancer Study Group -- Hamilton, Anne -- Mileshkin, Linda -- Au-Yeung, George -- Kennedy, Catherine -- Hung, Jillian -- Chiew, Yoke-Eng -- Harnett, Paul -- Friedlander, Michael -- Quinn, Michael -- Pyman, Jan -- Cordner, Stephen -- O'Brien, Patricia -- Leditschke, Jodie -- Young, Greg -- Strachan, Kate -- Waring, Paul -- Azar, Walid -- Mitchell, Chris -- Traficante, Nadia -- Hendley, Joy -- Thorne, Heather -- Shackleton, Mark -- Miller, David K -- Arnau, Gisela Mir -- Tothill, Richard W -- Holloway, Timothy P -- Semple, Timothy -- Harliwong, Ivon -- Nourse, Craig -- Nourbakhsh, Ehsan -- Manning, Suzanne -- Idrisoglu, Senel -- Bruxner, Timothy J C -- Christ, Angelika N -- Poudel, Barsha -- Holmes, Oliver -- Anderson, Matthew -- Leonard, Conrad -- Lonie, Andrew -- Hall, Nathan -- Wood, Scott -- Taylor, Darrin F -- Xu, Qinying -- Fink, J Lynn -- Waddell, Nick -- Drapkin, Ronny -- Stronach, Euan -- Gabra, Hani -- Brown, Robert -- Jewell, Andrea -- Nagaraj, Shivashankar H -- Markham, Emma -- Wilson, Peter J -- Ellul, Jason -- McNally, Orla -- Doyle, Maria A -- Vedururu, Ravikiran -- Stewart, Collin -- Lengyel, Ernst -- Pearson, John V -- Waddell, Nicola -- deFazio, Anna -- Grimmond, Sean M -- Bowtell, David D L -- England -- Nature. 2015 Nov 19;527(7578):398. doi: 10.1038/nature15716. Epub 2015 Oct 21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26503049" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2015-05-29
    Description: Patients with high-grade serous ovarian cancer (HGSC) have experienced little improvement in overall survival, and standard treatment has not advanced beyond platinum-based combination chemotherapy, during the past 30 years. To understand the drivers of clinical phenotypes better, here we use whole-genome sequencing of tumour and germline DNA samples from 92 patients with primary refractory, resistant, sensitive and matched acquired resistant disease. We show that gene breakage commonly inactivates the tumour suppressors RB1, NF1, RAD51B and PTEN in HGSC, and contributes to acquired chemotherapy resistance. CCNE1 amplification was common in primary resistant and refractory disease. We observed several molecular events associated with acquired resistance, including multiple independent reversions of germline BRCA1 or BRCA2 mutations in individual patients, loss of BRCA1 promoter methylation, an alteration in molecular subtype, and recurrent promoter fusion associated with overexpression of the drug efflux pump MDR1.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Patch, Ann-Marie -- Christie, Elizabeth L -- Etemadmoghadam, Dariush -- Garsed, Dale W -- George, Joshy -- Fereday, Sian -- Nones, Katia -- Cowin, Prue -- Alsop, Kathryn -- Bailey, Peter J -- Kassahn, Karin S -- Newell, Felicity -- Quinn, Michael C J -- Kazakoff, Stephen -- Quek, Kelly -- Wilhelm-Benartzi, Charlotte -- Curry, Ed -- Leong, Huei San -- Australian Ovarian Cancer Study Group -- Hamilton, Anne -- Mileshkin, Linda -- Au-Yeung, George -- Kennedy, Catherine -- Hung, Jillian -- Chiew, Yoke-Eng -- Harnett, Paul -- Friedlander, Michael -- Quinn, Michael -- Pyman, Jan -- Cordner, Stephen -- O'Brien, Patricia -- Leditschke, Jodie -- Young, Greg -- Strachan, Kate -- Waring, Paul -- Azar, Walid -- Mitchell, Chris -- Traficante, Nadia -- Hendley, Joy -- Thorne, Heather -- Shackleton, Mark -- Miller, David K -- Arnau, Gisela Mir -- Tothill, Richard W -- Holloway, Timothy P -- Semple, Timothy -- Harliwong, Ivon -- Nourse, Craig -- Nourbakhsh, Ehsan -- Manning, Suzanne -- Idrisoglu, Senel -- Bruxner, Timothy J C -- Christ, Angelika N -- Poudel, Barsha -- Holmes, Oliver -- Anderson, Matthew -- Leonard, Conrad -- Lonie, Andrew -- Hall, Nathan -- Wood, Scott -- Taylor, Darrin F -- Xu, Qinying -- Fink, J Lynn -- Waddell, Nick -- Drapkin, Ronny -- Stronach, Euan -- Gabra, Hani -- Brown, Robert -- Jewell, Andrea -- Nagaraj, Shivashankar H -- Markham, Emma -- Wilson, Peter J -- Ellul, Jason -- McNally, Orla -- Doyle, Maria A -- Vedururu, Ravikiran -- Stewart, Collin -- Lengyel, Ernst -- Pearson, John V -- Waddell, Nicola -- deFazio, Anna -- Grimmond, Sean M -- Bowtell, David D L -- 13086/Cancer Research UK/United Kingdom -- England -- Nature. 2015 May 28;521(7553):489-94. doi: 10.1038/nature14410.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4067, Australia [2] QIMR Berghofer Medical Research Institute, Brisbane, Queensland 4006, Australia. ; Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia. ; 1] Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia [2] Department of Pathology, University of Melbourne, Parkville, Victoria 3052, Australia [3] Sir Peter MacCallum Cancer Centre Department of Oncology, University of Melbourne, Parkville, Victoria 3052, Australia. ; The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut 06030, USA. ; 1] Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4067, Australia [2] WolfsonWohl Cancer Research Centre, Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1QH, UK. ; 1] Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4067, Australia [2] Technology Advancement Unit, Genetics and Molecular Pathology, SA Pathology, Adelaide, South Australia 5000, Australia. ; Queensland Centre for Medical Genomics, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4067, Australia. ; Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK. ; 1] Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia [2] Department of Medicine, University of Melbourne, Parkville, Victoria 3052, Australia [3] The Royal Women's Hospital, Parkville, Victoria 3052, Australia. ; 1] Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia [2] Sir Peter MacCallum Cancer Centre Department of Oncology, University of Melbourne, Parkville, Victoria 3052, Australia. ; Centre for Cancer Research, University of Sydney at Westmead Millennium Institute, and Department of Gynaecological Oncology, Westmead Hospital, Sydney, New South Wales 2145, Australia. ; Crown Princess Mary Cancer Centre and University of Sydney at Westmead Hospital, Westmead, Sydney, New South Wales 2145, Australia. ; Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales 2031, Australia. ; The Royal Women's Hospital, Parkville, Victoria 3052, Australia. ; Victorian Institute of Forensic Medicine, Southbank, Victoria 3006, Australia. ; Department of Pathology, University of Melbourne, Parkville, Victoria 3052, Australia. ; Victorian Life Sciences Computation Initiative, Carlton, Victoria 3053, Australia. ; La Trobe Institute for Molecular Science, Bundoora, Victoria 3083, Australia. ; Dana-Farber Cancer Institute, Boston, Massachusetts 02115-5450, USA. ; University of Chicago, Chicago, Illinois 60637, USA. ; The University of Western Australia, Crawley, Western Australia 6009, Australia. ; 1] Peter MacCallum Cancer Centre, East Melbourne, Victoria 3002, Australia [2] Department of Pathology, University of Melbourne, Parkville, Victoria 3052, Australia [3] Sir Peter MacCallum Cancer Centre Department of Oncology, University of Melbourne, Parkville, Victoria 3052, Australia [4] Ovarian Cancer Action Research Centre, Department of Surgery and Cancer, Imperial College London, London W12 0HS, UK [5] Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria 3052, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26017449" target="_blank"〉PubMed〈/a〉
    Keywords: Cohort Studies ; Cyclin E/genetics ; Cystadenocarcinoma, Serous/drug therapy/genetics ; DNA Methylation ; DNA Mutational Analysis ; DNA-Binding Proteins/genetics ; Drug Resistance, Neoplasm/*drug effects/*genetics ; Female ; Genes, BRCA1 ; Genes, BRCA2 ; Genes, Neurofibromatosis 1 ; Genome, Human/*genetics ; Germ-Line Mutation/genetics ; Humans ; Mutagenesis/genetics ; Oncogene Proteins/genetics ; Ovarian Neoplasms/drug therapy/*genetics ; P-Glycoprotein/genetics ; PTEN Phosphohydrolase/genetics ; Promoter Regions, Genetic/genetics ; Retinoblastoma Protein/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2019
    Print ISSN: 0969-7128
    Electronic ISSN: 1476-5462
    Topics: Biology , Medicine
    Published by Springer Nature
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