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Dr Seher Ata

Conjoint Senior Lecturer

School of Architecture and Built Environment

Career Summary

Biography

Dr Seher Ata has been involved in all physical aspects of flotation both pulp and froth phase. Her PhD study was concerned with many complex mechanisms between the various phenomena occurring in the froth of a flotation system. Using artificially hydrophobised particles in the experimental work made a significant contribution to the understanding the froth phase behaviour and relevant mechanisms operating in the froth phase. In particular, it was shown that the collection of hydrophobic particles in the froth phase is possible and that there may be practical cases where it could be beneficial to feed particles into the froth rather than into the pulp, as is traditionally the case, particularly for the treatment of particles having difficulty in transferring from the pulp into the froth phase, such as large or weakly hydrophobic particles. As a result of this outcome, the recovery of coarse particles in the froth phase has been extended to industrial mineral flotation plants through a Linkage project where she is Chief investigator. She has been a research academic in the Centre for Multiphase Processes since 2002 and has been working on a number of projects including ultra-fine particle flotation, capture rate of hydrophobic particles in the froth phase, measurement of bubble sizes in industrial flotation cells and cluster formation in flotation cells. A remarkable discovery has been made during investigating the phenomena of cluster formation. It was found that bubbles in flotation cells form clusters and the size of them increases systematically with increases in the particle hydrophobicity. The cluster formation has not appeared in the literature before and its consequences in the flotation process are not known. Bubble clusters may be beneficial for the recovery of coarse particles which are poorly recovered by the existence flotation technologies. An experimental program has been taking to investigate the phenomena through an ARC Discovery grants where she is Chief Investigator. Dr Ata is chief investigator on two ARC projects (one ARC Linkage and one ARC DP) and two Independent Investigator Research Grants, a competitive external funding from the University of Newcastle.

Research Expertise
Recovery of hydrophobic particles in the froth phase Tracking of particles in the froth phase The formation of bubble clusters in flotation cells The behaviour of particles during coalescence of bubbles. 


Qualifications

  • PhD, University of Newcastle
  • Bachelor in Mining Engineering, Hacettepe University - Ankara - Turkey
  • Master in Mining Engineering, Hacettepe University - Ankara - Turkey

Keywords

  • Bubble coalescence
  • Bubble-particle interaction
  • Chemical Engineering
  • Flotation
  • Froth phase behaviour
  • Mineral processing,
  • Particle technology

Languages

  • Turkish (Fluent)

Fields of Research

CodeDescriptionPercentage
030699Physical Chemistry not elsewhere classified15
090499Chemical Engineering not elsewhere classified45
091499Resources Engineering and Extractive Metallurgy not elsewhere classified40

Professional Experience

UON Appointment

DatesTitleOrganisation / Department
1/01/2012 - 31/03/2012Research AssociateUniversity of Newcastle
School of Engineering
Australia
25/07/2011 - 2/12/2011Casual AcademicUniversity of Newcastle
School of Engineering
Australia

Academic appointment

DatesTitleOrganisation / Department
1/02/2002 - Academic ResearchUniversity of Newcastle
School of Engineering
Australia
1/01/1990 - 1/01/1993Research AssistantHacettepe University
Mining Engineering Department
Turkey
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (1 outputs)

YearCitationAltmetricsLink
2007Jameson GJ, Nguyen AV, Ata S, 'The flotation of fine and coarse particles', Froth Flotation: A Century of Innovation, Society for Mining, Metallurgy, and Exploration, Englewood, Colorado 339-372 (2007) [B1]
Co-authorsGraeme Jameson

Journal article (26 outputs)

YearCitationAltmetricsLink
2014Morse AJ, Tan SY, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Arrested coalescence behaviour of giant Pickering droplets and colloidosomes stabilised by poly(tert-butylaminoethyl methacrylate) latexes.', Soft Matter, 10 5669-5681 (2014) [C1]
DOI10.1039/c4sm00801dAuthor URL
CitationsScopus - 1Web of Science - 2
Co-authorsGrant Webber, Erica Wanless
2014Bournival G, Du Z, Ata S, Jameson GJ, 'Foaming and gas dispersion properties of non-ionic surfactants in the presence of an inorganic electrolyte', Chemical Engineering Science, 116 536-546 (2014) [C1]

Foams represent an important area of research due to their relevance in many industrial processes. Where there are geographical constraints, which can limit access to fresh water,... [more]

Foams represent an important area of research due to their relevance in many industrial processes. Where there are geographical constraints, which can limit access to fresh water, there is an economic incentive in using recycled water, bore water and even seawater for industrial purposes. This creates a growing interest in determining the effect of inorganic electrolytes on foaming and gas dispersion properties of non-ionic surfactant solutions. The present study compares the foaming and gas dispersion properties of the non-ionic surfactants 1-pentanol, tri(propylene glycol) methyl ether, and poly(propylene glycol) 425. For all surfactants, the stabilisation mechanism was influenced by the concentration of surfactant and the presence of salt with PPG being affected to a lesser extent. Sodium chloride was observed to have a detrimental effect on foaming at higher surfactant concentrations but improved foaming at low surfactant concentrations. At low surfactant concentrations, the addition of salt improved foaminess by dampening the hydrophobic force. An increase in gas holdup with increasing surfactant concentration was observed and was attributed to a decrease in bubble size. For poly(propylene glycol) an initial decrease in gas holdup was observed at very low concentrations. Salt mainly affected gas dispersion properties at a higher concentration. © 2014 Elsevier Ltd.

DOI10.1016/j.ces.2014.05.011
CitationsScopus - 3Web of Science - 3
Co-authorsGraeme Jameson
2014Bournival G, Ata S, Karakashev SI, Jameson GJ, 'An investigation of bubble coalescence and post-rupture oscillation in non-ionic surfactant solutions using high-speed cinematography', JOURNAL OF COLLOID AND INTERFACE SCIENCE, 414 50-58 (2014) [C1]
DOI10.1016/j.jcis.2013.09.050Author URL
CitationsScopus - 3Web of Science - 3
Co-authorsGraeme Jameson
2014Bournival G, Du Z, Ata S, Jameson GJ, 'Foaming and gas dispersion properties of non-ionic frothers in the presence of hydrophobized submicron particles', INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 133 123-131 (2014) [C1]
DOI10.1016/j.minpro.2014.08.010Author URL
CitationsScopus - 2Web of Science - 1
Co-authorsGraeme Jameson
2014Bournival G, Ata S, Jameson GJ, 'The influence of submicron particles and salt on the recovery of coarse particles', Minerals Engineering, 69 146-153 (2014) [C1]

Coarse particles are more difficult to float. One of the factors that contributes to poor floatability is the stability of froth. The froth formed in industrial flotation cells is... [more]

Coarse particles are more difficult to float. One of the factors that contributes to poor floatability is the stability of froth. The froth formed in industrial flotation cells is typically not strong enough to provide adequate support for coarse and dense particles. The present study investigates how the presence of hydrophobic submicron particles at low concentration increases the recovery of relatively coarse particles through improvement in the froth stability. Silica particles with d80 of approximately 230 µm were floated in a laboratory mechanical flotation cell in a collector-free environment in the presence of poly(propylene glycol) 425 as a frothing agent. The hydrophobicity of the feed particles was modified through an esterification process with different alcohols ranging from 3 to 8 hydrocarbon groups to form a coating of intermediate hydrophobicity. Hydrophobised silica submicron particles of 300 nm in size were added to the flotation cell at 0.01 and 0.1 wt% concentration. The effect of electrolyte, sodium chloride, in the concentration range 10-5-10-1 M on the recovery of coarse particles was also investigated. For the feed employed, 1-butanol was found to provide relatively good flotation properties with a possibility for improvement by stabilising the froth phase. Both additives slightly stabilised the froth phase, which resulted in an increase in the maximum recovery of up to approximately 8%. It appeared that the additives had no significant effect on the first-order flotation rate constant.

DOI10.1016/j.mineng.2014.07.003
CitationsScopus - 1Web of Science - 1
Co-authorsGraeme Jameson
2013Ang ZJ, Bournival G, Ata S, 'Influence of frothers on the detachment of galena particles from bubbles', International Journal of Mineral Processing, 121 59-64 (2013) [C1]
DOI10.1016/j.minpro.2013.02.003Author URL
CitationsScopus - 3Web of Science - 3
2013Ata S, Jameson GJ, 'Recovery of coarse particles in the froth phase - A case study', MINERALS ENGINEERING, 45 121-127 (2013) [C3]
DOI10.1016/j.mineng.2013.02.006Author URL
CitationsScopus - 5Web of Science - 5
Co-authorsGraeme Jameson
2013Tan S-Y, Ata S, Wanless EJ, 'Direct Observation of Individual Particle Armored Bubble Interaction, Stability, and Coalescence Dynamics', JOURNAL OF PHYSICAL CHEMISTRY B, 117 8579-8588 (2013) [C1]
DOI10.1021/jp402052fAuthor URL
CitationsScopus - 1Web of Science - 2
Co-authorsErica Wanless
2012Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions and particle sliding using Discrete Element Method', Journal of Colloid and Interface Science, 381 1-10 (2012) [C1]
CitationsScopus - 5Web of Science - 4
Co-authorsErica Wanless, Roberto Moreno-Atanasio
2012Ata S, 'Phenomena in the froth phase of flotation - A review', International Journal of Mineral Processing, 102-103 1-12 (2012) [C1]
CitationsScopus - 23Web of Science - 16
2012Rahman RM, Ata S, Jameson GJ, 'The effect of flotation variables on the recovery of different particle size fractions in the froth and the pulp', International Journal of Mineral Processing, 106 70-77 (2012) [C1]
CitationsScopus - 19Web of Science - 13
Co-authorsGraeme Jameson
2012Thompson KL, Giakoumatos EC, Ata S, Webber GB, Armes SP, Wanless EJ, 'Direct observation of giant pickering emulsion and colloidosome droplet interaction and stability', Langmuir, 28 16501-16511 (2012) [C1]
CitationsScopus - 10Web of Science - 10
Co-authorsErica Wanless, Grant Webber
2012Bournival G, Pugh R, Ata S, 'Examination of NaCl and MIBC as bubble coalescence inhibitor in relation to froth flotation', Minerals Engineering, 25 47-53 (2012) [C1]
CitationsScopus - 18Web of Science - 16
2011Ata S, 'The role of frother on the detachment of particles from bubbles', Minerals Engineering, 24 476-478 (2011) [C1]
DOI10.1016/j.mineng.2010.12.008
CitationsScopus - 7Web of Science - 6
2011Ata S, Pugh RJ, Jameson GJ, 'The influence of interfacial ageing and temperature on the coalescence of oil droplets in water', Colloids and Surfaces A: Physicochemical and Engineering Aspects, 374 96-101 (2011) [C1]
DOI10.1016/j.colsurfa.2010.11.012
CitationsScopus - 4Web of Science - 4
Co-authorsGraeme Jameson
2010Ata S, Davis ES, Dupin D, Armes SP, Wanless EJ, 'Direct observation of pH-induced coalescence of latex-stabilized bubbles using high-speed video imaging', Langmuir, 26 7865-7874 (2010) [C1]
DOI10.1021/la904708x
CitationsScopus - 17Web of Science - 16
Co-authorsErica Wanless
2010Bournival G, Ata S, 'Packing of particles on the surface of bubbles', Minerals Engineering, 23 111-116 (2010) [C1]
DOI10.1016/j.mineng.2009.10.012
CitationsScopus - 13Web of Science - 13
2009Ata S, 'The detachment of particles from coalescing bubble pairs', Journal of Colloid and Interface Science, 338 558-565 (2009) [C1]
DOI10.1016/j.jcis.2009.07.003
CitationsScopus - 27Web of Science - 25
2009Stevenson P, Ata S, Evans GM, 'The behavior of an oscillating particle attached to a gas-liquid surface', Industrial & Engineering Chemistry Research, 48 8024-8029 (2009) [C1]
DOI10.1021/ie900085d
CitationsScopus - 6Web of Science - 6
Co-authorsGeoffrey Evans
2008Ata S, 'Coalescence of bubbles covered by particles', Langmuir, 24 6085-6091 (2008) [C1]
DOI10.1021/la800466x
CitationsScopus - 31Web of Science - 30
2007Stevenson P, Ata S, Evans GM, 'Convective-dispersive gangue transport in flotation froth', Chemical Engineering Science, 62 5736-5744 (2007) [C1]
DOI10.1016/j.ces.2007.05.038
CitationsScopus - 12Web of Science - 9
Co-authorsGeoffrey Evans
2006Ata S, Pigram SM, Jameson GJ, 'Tracking of particles in the froth phase: An experimental technique', Minerals Engineering, 19 824-830 (2006) [C1]
DOI10.1016/j.mineng.2005.09.051
CitationsScopus - 9Web of Science - 8
Co-authorsGraeme Jameson
2006Ata S, Yates PD, 'Stability and flotation behaviour of silica in the presence of a non-polar oil and cationic surfactant', Colloids and Surfaces A -Physicochemical and Engineering Aspects, 277 1-7 (2006) [C1]
DOI10.1016/j.colsurfa.2005.10.062
CitationsScopus - 13Web of Science - 8
2004Ata S, Ahmed N, Jameson GJ, 'The effect of hydrophobicity on the drainage of gangue minerals in flotation froths', Minerals Engineering, 17 897-901 (2004) [C1]
DOI10.1016/j.mineng.2004.04.005
CitationsScopus - 30Web of Science - 23
Co-authorsGraeme Jameson
2003Ata S, Ahmed N, Jameson GJ, 'A Study of bubble Coalescence in Flotation Froths', International Journal of Mineral Processing, 72 255-266 (2003) [C1]
DOI10.1016/S0301-7516(03)00103-0
CitationsScopus - 44Web of Science - 30
Co-authorsGraeme Jameson
2002Ata S, Ahmed N, Jameson GJ, 'Collection of hydrophobic particles in the froth phase', International Journal of Mineral Processing, 64 101-122 (2002) [C1]
CitationsScopus - 46Web of Science - 30
Co-authorsGraeme Jameson
Show 23 more journal articles

Conference (16 outputs)

YearCitationAltmetricsLink
2014Wanless EJ, Smith J, Bournival G, Tan SY, Webber GB, Ata S, 'High speed video observations of alumina-coated air bubble coalescence', Chemeca 2014: Processing excellence; Powering our future, Perth (2014) [E1]
Co-authorsGrant Webber, Erica Wanless
2014Morse AJ, Tan S-Y, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Coalescence behavior of giant Pickering droplets and colloidosomes stabilized by poly(tert-butylaminoethyl methacrylate) latexes', ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, San Francisco, CA (2014) [E3]
Author URL
Co-authorsErica Wanless, Grant Webber
2012Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions using Discrete Element Method', Chemeca 2012 : Quality of Life Through Chemical Engineering, Wellington, NZ (2012) [E1]
Co-authorsErica Wanless, Roberto Moreno-Atanasio
2012Rahman RM, Ata S, Jameson GJ, 'Froth recovery measurements in an industrial flotation cell', 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings, New Delhi, India (2012) [E1]
CitationsScopus - 3Web of Science - 2
Co-authorsGraeme Jameson
2010Chen Z, Ata S, Jameson GJ, 'Behaviour of bubble clusters in a turbulent flow', XXV International Mineral Processing Congress IMPC 2010,, Brisbane (2010) [E1]
CitationsScopus - 1
Co-authorsGraeme Jameson
2010Rahman R, Ata S, Jameson GJ, 'Development of a froth dropback measurement device', XXV International Mineral Processing Congress IMPC 2010,, Brisbane (2010) [E1]
Co-authorsGraeme Jameson
2009Pugh RJ, Ata S, 'Coalescence of bubbles and foaming in chemical surfactant free aqueous dispersions of mineral particles', 13th IACIS International Conference on Surface and Colloid Science and the 83rd ACS Colloid & Surface Science Symposium: Technical Program, New York, USA (2009) [E3]
2008Ata S, Pugh RJ, Jameson GJ, 'The influence of coverage of particles on the coalescence of bubbles', 17th International Symposium on Surfactants in Solution. Abstracts, Berlin, Germany (2008) [E3]
Co-authorsGraeme Jameson
2008Ata S, Jameson GJ, 'Coalescence of bubble pairs in surfactant solutions', Proceedings of XXIV International Mineral Processing Congress, Beijing, China (2008) [E1]
Co-authorsGraeme Jameson
2006Ata S, Jameson GJ, 'Flotation of Dispersed Silica Particles', Proceedings of XXIII International Mineral Processing Congress, Istanbul, Turkey (2006) [E1]
Co-authorsGraeme Jameson
2005Ata S, Agarwal A, Jameson GJ, 'The Formation of Bubble Clusters in Flotation Cells - Effect of Impeller Speed', Centenary of Flotation Symposium, Brisbane (2005) [E1]
DOI10.1016/j.minpro.2004.12.007
CitationsScopus - 32Web of Science - 22
Co-authorsGraeme Jameson
2005Ata S, Pigram SM, Jameson GJ, 'Tracking of Particles in the Froth Phase - An Experimental Technique', Centenary of Flotation Symposium, Brisbane (2005) [E1]
Co-authorsGraeme Jameson
2003Ata S, Ahmed N, Jameson GJ, 'Gangue Drainage in Flotation Froths', XXII International Mineral Processing Congress, Cape Town, South Africa (2003) [E1]
Co-authorsGraeme Jameson
1999Ata S, Ahmed N, 'The effect of hydrophobicity on the froth phase behaviour', 27th Australasian Chemical Engineering Conference, Newcastle (1999) [E1]
1998Ata S, Ahmed N, 'Particle Shape Effects on Entrainment in Flotation', Proceedings of the 26th Australasian Chemical Engineering Conference, Port Douglas, Australia (1998) [E1]
1998Ata S, Ahmed N, 'The Effect of Hydrophobic Particles on the Entrainment of Hydrophilic Particles', Proceedings of the 7th International Mineral Processing Symposium, Istanbul, Turkey (1998) [E2]
Show 13 more conferences
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Grants and Funding

Summary

Number of grants11
Total funding$1,591,637

Click on a grant title below to expand the full details for that specific grant.


20122 grants / $330,000

Particle-Stabilised Bubble and Droplet Interfaces$315,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Erica Wanless, Doctor Seher Ata
SchemeDiscovery Projects
RoleInvestigator
Funding Start2012
Funding Finish2012
GNoG1100202
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

2011 Emerging Research Leaders Program$15,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Seher Ata
SchemeEmerging Research Leaders Program
RoleLead
Funding Start2012
Funding Finish2012
GNoG1200512
Type Of FundingInternal
CategoryINTE
UONY

20111 grants / $25,000

Improving the recovery of coarse particles in flotation$25,000

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamLaureate Professor Graeme Jameson, Doctor Seher Ata
SchemeNear Miss Grant
RoleInvestigator
Funding Start2011
Funding Finish2011
GNoG1001040
Type Of FundingInternal
CategoryINTE
UONY

20101 grants / $17,000

The influence of frother types on sulphide minerals flotation $17,000

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding bodyUniversity of Newcastle - Faculty of Engineering & Built Environment
Project TeamDoctor Seher Ata
SchemePilot Grant
RoleLead
Funding Start2010
Funding Finish2010
GNoG0900064
Type Of FundingInternal
CategoryINTE
UONY

20081 grants / $1,700

XXIV International Mineral Processing Congress, Beijing, China, 24/9/2008 - 28/9/2008$1,700

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Seher Ata
SchemeTravel Grant
RoleLead
Funding Start2008
Funding Finish2008
GNoG0189318
Type Of FundingInternal
CategoryINTE
UONY

20072 grants / $9,700

Investigation of bubble clusters in froth flotation$8,000

Funding body: NEWCASTLE UNIVERSITY

Funding bodyNEWCASTLE UNIVERSITY
Project Team
SchemeINDEPENDENT INVESTIGATOR GRANT
RoleLead
Funding Start2007
Funding Finish2007
GNo
Type Of FundingInternal
CategoryINTE
UONY

Flotation 07, Cape Town, South Africa, 6/11/2007 - 9/11/2007$1,700

Funding body: University of Newcastle

Funding bodyUniversity of Newcastle
Project TeamDoctor Seher Ata
SchemeTravel Grant
RoleLead
Funding Start2007
Funding Finish2007
GNoG0188070
Type Of FundingInternal
CategoryINTE
UONY

20063 grants / $958,509

Extending the range of the flotation process for particle separation$950,000

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamLaureate Professor Graeme Jameson, Doctor Seher Ata
SchemeDiscovery Projects
RoleInvestigator
Funding Start2006
Funding Finish2006
GNoG0185241
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Behaviour of particles during coalescence of bubbles$5,909

Funding body: NEWCASTLE UNIVERSITY

Funding bodyNEWCASTLE UNIVERSITY
Project Team
SchemeINDEPENDENT INVESTIGATOR GRANT
RoleLead
Funding Start2006
Funding Finish2006
GNo
Type Of FundingInternal
CategoryINTE
UONY

Floatation of Dispersed Fine Silica Particles$2,600

Funding body: Ian Potter Foundation

Funding bodyIan Potter Foundation
Project TeamDoctor Seher Ata
SchemeTravel Grant
RoleLead
Funding Start2006
Funding Finish2006
GNoG0186580
Type Of FundingDonation - Aust Non Government
Category3AFD
UONY

20051 grants / $249,728

Mineral Flotation - Integrating Science and Practice$249,728

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamLaureate Professor Graeme Jameson, Doctor Seher Ata
SchemeLinkage Projects
RoleInvestigator
Funding Start2005
Funding Finish2005
GNoG0185579
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY
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Research Supervision

Past Supervision

YearResearch Title / Program / Supervisor Type
2015Stabilisation of Bubbles and Froths with Colloidal Particles and Inorganic Electrolytes
Chemical Engineering, Faculty of Engineering and Built Environment
Principal Supervisor
2014Behaviour of Bubble Clusters in a Turbulent Flotation Cell
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2014Studies of Froth Recovery in Flotation
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2013Detachment of Particles From Bubbles in a Turbulent Motion
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2013The Attachment of Bubbles to Composite Particles
Chemical Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
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Dr Seher Ata

Position

Conjoint Senior Lecturer
Centre for Multiphase Processes
School of Architecture and Built Environment
Faculty of Engineering and Built Environment

Contact Details

Emailseher.ata@newcastle.edu.au
Phone(02) 4921 5881
Fax(02) 4960 1445

Office

RoomEB120
BuildingEngineering B
LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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