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Jones-Salkey O, Windows-Yule CRK, Ingram A, Stahler L, Nicusan AL, Clifford S, Martin de Juan L, Reynolds GK. Using AI/ML to predict blending performance and process sensitivity for Continuous Direct Compression (CDC). Int J Pharm 2024; 651:123796. [PMID: 38190950 DOI: 10.1016/j.ijpharm.2024.123796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/03/2024] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
Utilising three artificial intelligence (AI)/machine learning (ML) tools, this study explores the prediction of fill level in inclined linear blenders at steady state by mapping a wide range of bulk powder characteristics to processing parameters. Predicting fill levels enables the calculation of blade passes (strain), known from existing literature to enhance content uniformity. We present and train three AI/ML models, each demonstrating unique predictive capabilities for fill level. These models collectively identify the following rank order of feature importance: RPM, Mixing Blade Region (MB) size, Wall Friction Angle (WFA), and Feed Rate (FR). Random Forest Regression, a machine learning algorithm that constructs a multitude of decision trees at training time and outputs the mode of the classes (classification) or mean prediction (regression) of the individual trees, develops a series of individually useful decision trees. but also allows the extraction of logic and breakpoints within the data. A novel tool which utilises smart optimisation and symbolic regression to model complex systems into simple, closed-form equations, is used to build an accurate reduced-order model. Finally, an Artificial Neural Network (ANN), though less interrogable emerges as the most accurate fill level predictor, with an r2 value of 0.97. Following training on single-component mixtures, the models are tested with a four-component powdered paracetamol formulation, mimicking an existing commercial drug product. The ANN predicts the fill level of this formulation at three RPMs (250, 350 and 450) with a mean absolute error of 1.4%. Ultimately, the modelling tools showcase a framework to better understand the interaction between process and formulation. The result of this allows for a first-time-right approach for formulation development whilst gaining process understanding from fewer experiments. Resulting in the ability to approach risk during product development whilst gaining a greater holistic understanding of the processing environment of the desired formulation.
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Affiliation(s)
- O Jones-Salkey
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK.
| | - C R K Windows-Yule
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK
| | - A Ingram
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK
| | - L Stahler
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - A L Nicusan
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK
| | - S Clifford
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - L Martin de Juan
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Gothenburg, SWE
| | - G K Reynolds
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
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2
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Nguyen C, Parson HK, Pettaway J, Ingram A, Sears T, Bard JT, Forte S, Wintringham JA, Vinik E, Siraj ES, Casellini CM. Utilizing a quality of life tool to examine the presence of fatigue in subjects with diabetes mellitus. J Clin Transl Endocrinol 2023; 34:100328. [PMID: 38034042 PMCID: PMC10682818 DOI: 10.1016/j.jcte.2023.100328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/12/2023] [Accepted: 10/20/2023] [Indexed: 12/02/2023] Open
Abstract
Introduction The prevalence of fatigue in patients with diabetes mellitus (DM) can be as high as 50 %. Physical, mental, and psychosocial components of fatigue negatively impact quality of life (QOL), morbidity and mortality. Several tools have been developed to address fatigue, but none specifically for measuring fatigue in DM. The aim of this study was to assess the impact of diabetes and neuropathy on fatigue using the Norfolk QOL-Fatigue (QOL-F) survey. Methods 605 adult participants from [Anonymous] were recruited (400 subjects with type 1 or type 2 DM and 205 subjects without diabetes (controls)). All subjects completed the Norfolk QOL-F. Demographics, weight, BMI, and duration of diabetes were obtained. The Norfolk QOL-F, a 35-item validated questionnaire, assesses five domains: subjective fatigue, physical and cognitive fatigue, reduced activities, impaired activities of daily living, and depression. Results Subjects with DM reported significantly higher fatigue total scores (52.63vs33.89, p < 0.0001) and in all five domains when compared to controls. Patients with DM with neuropathy were significantly more fatigued than those without (59.72vs27.83, p < 0.0001). Fatigue scores in patients with DM without neuropathy were similar to controls (27.83vs33.89, p = NS). In multivariate analysis, age, gender, and presence of neuropathy significantly impacted fatigue scores. Conclusions The Norfolk QOL-F questionnaire can potentially identify the impact of chronic diseases such as diabetes on fatigue. Assessing the different components of fatigue is important for clinicians in improving disease management and outcomes. Further investigations are needed to confirm these observations in specific cohorts with other comorbidities.
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Affiliation(s)
- Catherine Nguyen
- School of Medicine, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Henri K. Parson
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Jordan Pettaway
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Amber Ingram
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Taneisha Sears
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Jason T. Bard
- School of Medicine, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | - Steven Forte
- School of Medicine, Eastern Virginia Medical School, Norfolk, VA 23507, USA
| | | | - Etta Vinik
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Elias S. Siraj
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
| | - Carolina M. Casellini
- Strelitz Diabetes Center, EVMS Endocrine & Metabolic Disorders, Eastern Virginia Medical School, Norfolk, VA 23510, USA
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Jones-Salkey O, Nicusan AL, Windows-Yule CRK, Ingram A, Werner D, Clifford S, Reynolds GK. Application of Positron Emission Particle Tracking (PEPT) for the evaluation of powder behaviour in an incline linear blender for Continuous Direct Compression (CDC). Int J Pharm 2023; 645:123361. [PMID: 37673280 DOI: 10.1016/j.ijpharm.2023.123361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/11/2023] [Accepted: 08/31/2023] [Indexed: 09/08/2023]
Abstract
Positron Emission Particle Tracking (PEPT) is a non-invasive measurement technique which offers the ability to track the motion of individual particles with high temporal and spatial resolution, and thus build up an understanding of the bulk behaviour of a system from its microscopic (particle level) dynamics. Using this measurement technique, we have developed a series of novel metrics to better understand the behaviours of powders during the steady-state operation of a continuous blender system. Results are presented concerning the response of particle motion to processing parameters (mixing blade configuration and RPM), quantifying the motion in terms of predicted mixing performance. It was found that both increasing rpm and increasing hold-up mass (by selecting fewer transport blades and more mixing blades) provided improved mixing conditions. Interestingly, under specific conditions, there is evidence of convection-like mixing occurring at the interface of the transport and mixing region. This suggests the existence of a potential 'folding region' whereby powder is transported up the barrel (and away from the powder bulk bed) before being reconstituted back into the bulk mass. The results also provide valuable experimental data for the development, calibration and validation of future Discrete Element Method (DEM) simulations.
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Affiliation(s)
- O Jones-Salkey
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK.
| | - A L Nicusan
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, UK
| | - C R K Windows-Yule
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, UK
| | - A Ingram
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, UK
| | - D Werner
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, UK
| | - S Clifford
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
| | - G K Reynolds
- Oral Product Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield, UK
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Rhymer D, Ingram A, Sadler K, Windows-Yule C. A discrete element method investigation within vertical stirred milling: Changing the grinding media restitution and sliding friction coefficients. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2022.117825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ataman LM, Laronda MM, Gowett M, Trotter K, Anvari H, Fei F, Ingram A, Minette M, Suebthawinkul C, Taghvaei Z, Torres-Vélez M, Velez K, Adiga SK, Anazodo A, Appiah L, Bourlon MT, Daniels N, Dolmans MM, Finlayson C, Gilchrist RB, Gomez-Lobo V, Greenblatt E, Halpern JA, Hutt K, Johnson EK, Kawamura K, Khrouf M, Kimelman D, Kristensen S, Mitchell RT, Moravek MB, Nahata L, Orwig KE, Pavone ME, Pépin D, Pesce R, Quinn GP, Rosen MP, Rowell E, Smith K, Venter C, Whiteside S, Xiao S, Zelinski M, Goldman KN, Woodruff TK, Duncan FE. A synopsis of global frontiers in fertility preservation. J Assist Reprod Genet 2022; 39:1693-1712. [PMID: 35870095 PMCID: PMC9307970 DOI: 10.1007/s10815-022-02570-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/08/2022] [Indexed: 11/28/2022] Open
Abstract
Since 2007, the Oncofertility Consortium Annual Conference has brought together a diverse network of individuals from a wide range of backgrounds and professional levels to disseminate emerging basic and clinical research findings in fertility preservation. This network also developed enduring educational materials to accelerate the pace and quality of field-wide scientific communication. Between 2007 and 2019, the Oncofertility Consortium Annual Conference was held as an in-person event in Chicago, IL. The conference attracted approximately 250 attendees each year representing 20 countries around the world. In 2020, however, the COVID-19 pandemic disrupted this paradigm and precluded an in-person meeting. Nevertheless, there remained an undeniable demand for the oncofertility community to convene. To maintain the momentum of the field, the Oncofertility Consortium hosted a day-long virtual meeting on March 5, 2021, with the theme of "Oncofertility Around the Globe" to highlight the diversity of clinical care and translational research that is ongoing around the world in this discipline. This virtual meeting was hosted using the vFairs ® conference platform and allowed over 700 people to participate, many of whom were first-time conference attendees. The agenda featured concurrent sessions from presenters in six continents which provided attendees a complete overview of the field and furthered our mission to create a global community of oncofertility practice. This paper provides a synopsis of talks delivered at this event and highlights the new advances and frontiers in the fields of oncofertility and fertility preservation around the globe from clinical practice and patient-centered efforts to translational research.
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Affiliation(s)
- L M Ataman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - M M Laronda
- Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - M Gowett
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - K Trotter
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - H Anvari
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - F Fei
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - A Ingram
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - M Minette
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - C Suebthawinkul
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - Z Taghvaei
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - M Torres-Vélez
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - K Velez
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - S K Adiga
- Department of Clinical Embryology, Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal, India
| | - A Anazodo
- Kids Cancer Centre, Sydney Children's Hospital, Nelune Comprehensive Cancer Centre, Sydney, Australia
- School of Clinical Medicine, University of New South Wales, Sydney, Australia
| | - L Appiah
- Department of Obstetrics and Gynecology, The University of Colorado School of Medicine, Aurora, CO, USA
| | - M T Bourlon
- Hemato-Oncology Department, Instituto Nacional de Ciencias Médicas Y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - N Daniels
- The Oncology and Fertility Centres of Ekocorp, Eko Hospitals, Lagos, Nigeria
| | - M M Dolmans
- Gynecology Research Unit, Institut de Recherche Expérimentale Et Clinique, Université Catholique de Louvain, Av. Mounier 52, 1200, Brussels, Belgium
- Department of Gynecology, Cliniques Universitaires Saint-Luc, Av. Hippocrate 10, 1200, Brussels, Belgium
| | - C Finlayson
- Department of Pediatrics (Endocrinology), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - R B Gilchrist
- School of Clinical Medicine, University of New South Wales, Sydney, Australia
| | - V Gomez-Lobo
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | | | - J A Halpern
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - K Hutt
- Anatomy & Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - E K Johnson
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Division of Urology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - K Kawamura
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - M Khrouf
- FERTILLIA, Clinique la Rose, Tunis, Tunisia
| | - D Kimelman
- Centro de Esterilidad Montevideo, Montevideo, Uruguay
| | - S Kristensen
- Department of Fertility, Copenhagen University Hospital, Copenhagen, Denmark
| | - R T Mitchell
- Department of Developmental Endocrinology, University of Edinburgh, Edinburgh, UK
| | - M B Moravek
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Michigan, Ann Arbor, MI, USA
- Department of Urology, University of Michigan, Ann Arbor, MI, USA
| | - L Nahata
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
- Endocrinology and Center for Biobehavioral Health, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - K E Orwig
- Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - M E Pavone
- Department of Obstetrics and Gynecology, Reproductive Endocrinology and Infertility, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - D Pépin
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - R Pesce
- Reproductive Medicine Unit, Obstetrics and Gynecology Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - G P Quinn
- Departments of Obstetrics and Gynecology, Center for Medical Ethics, Population Health, Grossman School of Medicine, New York University, New York, NY, USA
| | - M P Rosen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Reproductive Endocrinology and Infertility, University of California, San Francisco, CA, USA
| | - E Rowell
- Department of Surgery (Pediatric Surgery), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - K Smith
- Department of Obstetrics and Gynecology, Reproductive Endocrinology and Infertility, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - C Venter
- Vitalab, Johannesburg, South Africa
| | - S Whiteside
- Fertility & Reproductive Health Program, Department of Hematology/Oncology/BMT, Nationwide Children's Hospital, Columbus, OH, USA
| | - S Xiao
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Environmental Health Sciences Institute, Rutgers University, New Brunswick, NJ, USA
| | - M Zelinski
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - K N Goldman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA
| | - T K Woodruff
- Department of Obstetrics, Gynecology, and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - F E Duncan
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7-117, Chicago, IL, 60611, USA.
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6
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Ataman LM, Laronda MM, Gowett M, Trotter K, Anvari H, Fei F, Ingram A, Minette M, Suebthawinkul C, Taghvaei Z, Torres-Vélez M, Velez K, Adiga SK, Anazodo A, Appiah L, Bourlon MT, Daniels N, Dolmans MM, Finlayson C, Gilchrist RB, Gomez-Lobo V, Greenblatt E, Halpern JA, Hutt K, Johnson EK, Kawamura K, Khrouf M, Kimelman D, Kristensen S, Mitchell RT, Moravek MB, Nahata L, Orwig KE, Pavone ME, Pépin D, Pesce R, Quinn GP, Rosen MP, Rowell E, Smith K, Venter C, Whiteside S, Xiao S, Zelinski M, Goldman KN, Woodruff TK, Duncan FE. Correction to: A synopsis of global frontiers in fertility preservation. J Assist Reprod Genet 2022; 39:1713-1714. [PMID: 35920992 PMCID: PMC9428069 DOI: 10.1007/s10815-022-02586-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/08/2022] [Indexed: 10/16/2022] Open
Affiliation(s)
- L M Ataman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - M M Laronda
- Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - M Gowett
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - K Trotter
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - H Anvari
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - F Fei
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - A Ingram
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - M Minette
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - C Suebthawinkul
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - Z Taghvaei
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - M Torres-Vélez
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - K Velez
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - S K Adiga
- Department of Clinical Embryology, Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal, India
| | - A Anazodo
- Kids Cancer Centre, Sydney Children's Hospital, Nelune Comprehensive Cancer Centre, Sydney, Australia
- School of Clinical Medicine, University of New South Wales, Sydney, Australia
| | - L Appiah
- Department of Obstetrics and Gynecology, The University of Colorado School of Medicine, Aurora, CO, USA
| | - M T Bourlon
- Hemato‑Oncology Department, Instituto Nacional de Ciencias Médicas Y Nutrición Salvador Zubirán, Mexico City, Mexico
| | - N Daniels
- The Oncology and Fertility Centres of Ekocorp, Eko Hospitals, Lagos, Nigeria
| | - M M Dolmans
- Gynecology Research Unit, Institut de Recherche Expérimentale Et Clinique, Université Catholique de Louvain, Av. Mounier 52, 1200, Brussels, Belgium
- Department of Gynecology, Cliniques Universitaires Saint-Luc, Av. Hippocrate 10, 1200, Brussels, Belgium
| | - C Finlayson
- Department of Pediatrics (Endocrinology), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - R B Gilchrist
- School of Clinical Medicine, University of New South Wales, Sydney, Australia
| | - V Gomez-Lobo
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | | | - J A Halpern
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - K Hutt
- Anatomy & Developmental Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - E K Johnson
- Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Division of Urology, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, IL, USA
| | - K Kawamura
- Department of Obstetrics and Gynecology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - M Khrouf
- FERTILLIA, Clinique la Rose, Tunis, Tunisia
| | - D Kimelman
- Centro de Esterilidad Montevideo, Montevideo, Uruguay
| | - S Kristensen
- Department of Fertility, Copenhagen University Hospital, Copenhagen, Denmark
| | - R T Mitchell
- Department of Developmental Endocrinology, University of Edinburgh, Edinburgh, UK
| | - M B Moravek
- Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, University of Michigan, Ann Arbor, MI, USA
- Department of Urology, University of Michigan, Ann Arbor, MI, USA
| | - L Nahata
- Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
- Endocrinology and Center for Biobehavioral Health, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH, USA
| | - K E Orwig
- Department of Obstetrics, Gynecology and Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - M E Pavone
- Department of Obstetrics and Gynecology, Reproductive Endocrinology and Infertility, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - D Pépin
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - R Pesce
- Reproductive Medicine Unit, Obstetrics and Gynecology Department, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - G P Quinn
- Departments of Obstetrics and Gynecology, Center for Medical Ethics, Population Health, Grossman School of Medicine, New York University, New York, NY, USA
| | - M P Rosen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Division of Reproductive Endocrinology and Infertility, University of California, San Francisco, CA, USA
| | - E Rowell
- Department of Surgery (Pediatric Surgery), Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - K Smith
- Department of Obstetrics and Gynecology, Reproductive Endocrinology and Infertility, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - C Venter
- Vitalab, Johannesburg, South Africa
| | - S Whiteside
- Fertility & Reproductive Health Program, Department of Hematology/Oncology/BMT, Nationwide Children's Hospital, Columbus, OH, USA
| | - S Xiao
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Environmental Health Sciences Institute, Rutgers University, New Brunswick, NJ, USA
| | - M Zelinski
- Division of Reproductive & Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR, USA
| | - K N Goldman
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA
| | - T K Woodruff
- Department of Obstetrics, Gynecology, and Reproductive Biology, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - F E Duncan
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E. Superior Street, Lurie 7‑117, Chicago, IL, 60611, USA.
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Barten M, Sax B, Schopka S, Epailly E, Maccherini M, Amarelli C, Theil J, Borchert K, Behlke S, Ingram A, Zuckermann A. Real World Use of Extracorporeal Photopheresis After Heart Transplantation - Clinical Outcomes from a Seven Centre European Study. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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8
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Varol N, Delpouve N, Araujo S, Domenek S, Guinault A, Golovchak R, Ingram A, Delbreilh L, Dargent E. Amorphous rigidification and cooperativity drop in semi−crystalline plasticized polylactide. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122373] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Positron emission particle tracking (PEPT) is a noninvasive technique capable of imaging the three-dimensional dynamics of a wide variety of powders, particles, grains, and/or fluids. The PEPT technique can track the motion of particles with high temporal and spatial resolution and can be used to study various phenomena in systems spanning a broad range of scales, geometries, and physical states. We provide an introduction to the PEPT technique, an overview of its fundamental principles and operation, and a brief review of its application to a diverse range of scientific and industrial systems.
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Affiliation(s)
- C R K Windows-Yule
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;
| | - J P K Seville
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;
| | - A Ingram
- School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom;
| | - D J Parker
- School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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Daraio D, Villoria J, Ingram A, Alexiadis A, Stitt E, Marigo M. Investigating grinding media dynamics inside a vertical stirred mill using the discrete element method: Effect of impeller arm length. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.09.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kravets O, Zaremba O, Shpotyuk Y, Luchechko A, Szmuc K, Cebulski J, Ingram A, Shpotyuk O. Structure, morphology and optical-luminescence investigations of spinel ZnGa2O4 ceramics co-doped with Mn2+ and Eu3+ ions. Appl Nanosci 2019. [DOI: 10.1007/s13204-018-0681-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Eccles B, Harle A, Pullinger S, Holling C, Ingram A, Stark S, Bunce M, Melville G, Gibbins J, Calcutt N, Hickish T, Flubacher M, Marinaki T. Prospective DPYD testing in colorectal cancer patients in a realworld UK population. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Shpotyuk O, Ingram A, Baláž P, Bujňáková Z, Shpotyuk Y, Cebulski J. Free volume studies on mechanochemically milled β-As4S4 arsenical employing positron annihilation lifetime spectroscopy. Appl Nanosci 2018. [DOI: 10.1007/s13204-018-0645-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Golovchak R, Shpotyuk Y, Szlęzak J, Dziedzic A, Ingram A, Cebulski J. Giant visible and infrared light attenuation effect in nanostructured narrow-bandgap glasses. Opt Lett 2018; 43:387-390. [PMID: 29400866 DOI: 10.1364/ol.43.000387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
A unique effect of Bi on the optical and electrical properties of mixed Ga-containing Ge-Se and Ge-Te glasses is discovered. It is shown that glass with a low Bi content is completely transparent in a 3-16 μm spectral range, while the glass with a slightly higher Bi content possesses a large (>10 db/mm) attenuation coefficient, making a ∼millimeter thick glass sample fully opaque to VIS-IR radiation. Despite this contrast, both types of glass are found to retain their semiconducting properties, the DC conductivity at room temperature, σDC∼10-3 S/m, being comparable to that of silicon.
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Liska M, Hesp C, Tchekhovskoy A, Ingram A, van der Klis M, Markoff S. Formation of precessing jets by tilted black hole discs in 3D general relativistic MHD simulations. ACTA ACUST UNITED AC 2017. [DOI: 10.1093/mnrasl/slx174] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- M Liska
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
| | - C Hesp
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
- Gravitation Astroparticle Physics Amsterdam (GRAPPA) Institute, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
| | - A Tchekhovskoy
- Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Physics and Astronomy, Northwestern University, Evanston, IL 60202, USA
- Departments of Astronomy and Physics, Theoretical Astrophysics Center, University of California Berkeley, Berkeley, CA 94720-3411, USA
- Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA 94720, USA
- Kavli Institute for Theoretical Physics, Kohn Hall, University of California at Santa Barbara, Santa Barbara, CA 93106, USA
| | - A Ingram
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
| | - M van der Klis
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
| | - S Markoff
- Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
- Gravitation Astroparticle Physics Amsterdam (GRAPPA) Institute, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
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Shpotyuk O, Ingram A, Shpotyuk Y, Bujňáková Z, Baláž P. PVP-stabilized arsenic sulfide As4
S4
nanocomposites probed with positron annihilation lifetime spectroscopy. POLYM ENG SCI 2017. [DOI: 10.1002/pen.24503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- O. Shpotyuk
- Department of Structural Studies and Medical Physics; Institute of Physics, Jan Dlugosz University in Czestochowa; Czestochowa 42200 Poland
- Department of Optical Glasses and Ceramics; Vlokh Institute of Physical Optics; Lviv 79005 Ukraine
| | - A. Ingram
- Department of Physics; Opole University of Technology; Opole 45370 Poland
| | - Y. Shpotyuk
- Center for Innovation and Transfer of Natural Sciences and Engineering Knowledge, Faculty of Mathematics and Natural Sciences, University of Rzeszow; Rzeszow 35-310 Poland
- Department of Sensor and Semiconductor Electronics; Ivan Franko National University of Lviv; Lviv 79017 Ukraine
| | - Z. Bujňáková
- Department of Mechanochemistry; Institute of Geotechnics of Slovak Academy of Sciences; Košice 04001 Slovakia
| | - P. Baláž
- Department of Mechanochemistry; Institute of Geotechnics of Slovak Academy of Sciences; Košice 04001 Slovakia
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Shpotyuk Y, Ingram A, Shpotyuk O, Dziedzic A, Boussard-Pledel C, Bureau B. Free-Volume Nanostructurization in Ga-Modified As2Se3 Glass. Nanoscale Res Lett 2016; 11:20. [PMID: 26759356 PMCID: PMC4710627 DOI: 10.1186/s11671-016-1237-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/05/2016] [Indexed: 06/05/2023]
Abstract
Different stages of intrinsic nanostructurization related to evolution of free-volume voids, including phase separation, crystalline nuclei precipitation, and growth, were studied in glassy As2Se3 doped with Ga up to 5 at. %, using complementary techniques of positron annihilation lifetime spectroscopy, X-ray powder diffraction, and scanning electron microscopy with energy-dispersive X-ray analysis. Positron lifetime spectra reconstructed in terms of a two-state trapping model testified in favor of a native void structure of g-As2Se3 modified by Ga additions. Under small Ga content (below 3 at. %), the positron trapping in glassy alloys was dominated by voids associated with bond-free solid angles of bridging As2Se4/2 units. This void agglomeration trend was changed on fragmentation with further Ga doping due to crystalline Ga2Se3 nuclei precipitation and growth, these changes being activated by employing free volume from just attached As-rich glassy matrix with higher content of As2Se4/2 clusters. Respectively, the positron trapping on free-volume voids related to pyramidal AsSe3/2 units (like in parent As2Se3 glass) was in obvious preference in such glassy crystalline alloys.
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Affiliation(s)
- Ya Shpotyuk
- Department of Electronics, Ivan Franko National University of Lviv, 107, Tarnavskogo str., 79017, Lviv, Ukraine.
- Centre for Innovation and Transfer of Natural Sciences and Engineering Knowledge, University of Rzeszow, 1, Pigonia str., 35-959, Rzeszow, Poland.
- Laboratoire Verres et Céramiques, UMR-CNRS 6226, Université de Rennes 1, 35042, Rennes, Cedex, France.
| | - A Ingram
- Opole University of Technology, 75, Ozimska str., 45370, Opole, Poland
| | - O Shpotyuk
- Vlokh Institute of Physical Optics, 23, Dragomanov str., 79005, Lviv, Ukraine
- Institute of Physics, Jan Dlugosz University, 13/15, Armii Krajowej al., 42200, Czestochowa, Poland
| | - A Dziedzic
- Centre for Innovation and Transfer of Natural Sciences and Engineering Knowledge, University of Rzeszow, 1, Pigonia str., 35-959, Rzeszow, Poland
| | - C Boussard-Pledel
- Laboratoire Verres et Céramiques, UMR-CNRS 6226, Université de Rennes 1, 35042, Rennes, Cedex, France
| | - B Bureau
- Laboratoire Verres et Céramiques, UMR-CNRS 6226, Université de Rennes 1, 35042, Rennes, Cedex, France
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Carter HF, Ingram A, Macfie JWS. Observations on the Ceratopogonine Midges of the Gold Coast with Descriptions of New Species. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1921.11684266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Carter HF, Ingram A, Macfie JWS. Observations on the Ceratopogonine Midges of the Gold Coast with Descriptions of New Species. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1921.11684241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Carter HF, Ingram A, Macfie JWS. Observations on the Ceratopogonine Midges of the Gold Coast with Descriptions of New Species. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1920.11684235] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Carter HF, Ingram A, Macfie JWS. Observations on the Ceratopogonine Midges of the Gold Coast with Descriptions of New Species. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1920.11684236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ingram A, Macfie JWS. Notes on Some African Ceratopogoninae—Species of the GenusForcipomyia. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1924.11684432] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Macfie JWS, Ingram A. Bronchomoniliasis Complicating Pulmonary Tuberculosis in a Native of the Gold Coast, West Africa. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1921.11684250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ingram A, Macfie JWS. Notes on Some African Ceratopogoninae—Species of the GenusLasiohelea. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1924.11684422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Ingram A. Note on a Possible Intermediate Host ofSchistosoma Haematobiumin the Gold Coast. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1924.11684415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Shpotyuk Y, Ingram A, Shpotyuk O, Boussard-Pledel C, Nazabal V, Bureau B. Effect of rare-earth doping on the free-volume structure of Ga-modified Te20As30Se50glass. RSC Adv 2016. [DOI: 10.1039/c6ra02092e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Doping with 500 ppmw of Pr3+ions is found to depress positron trapping in Te20As29Ga1Se50glass, this effect being explained in terms of competitive contribution of different occupancy positions available for rare-earth ions and trapped positrons.
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Affiliation(s)
- Ya. Shpotyuk
- Centre for Innovation and Transfer of Natural Sciences and Engineering Knowledge
- University of Rzeszow
- 35-959 Rzeszow
- Poland
- Lab. Verres et Céramiques UMR-CNRS 6226
| | - A. Ingram
- Opole University of Technology
- 45370 Opole
- Poland
| | - O. Shpotyuk
- Vlokh Institute of Physical Optics
- 79005 Lviv
- Ukraine
- Institute of Physics
- Jan Dlugosz University
| | - C. Boussard-Pledel
- Lab. Verres et Céramiques UMR-CNRS 6226
- University of Rennes 1
- 35042 Rennes Cedex
- France
| | - V. Nazabal
- Lab. Verres et Céramiques UMR-CNRS 6226
- University of Rennes 1
- 35042 Rennes Cedex
- France
| | - B. Bureau
- Lab. Verres et Céramiques UMR-CNRS 6226
- University of Rennes 1
- 35042 Rennes Cedex
- France
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Shpotyuk O, Bujňáková Z, Baláž P, Ingram A, Shpotyuk Y. Positron annihilation lifetime study of polyvinylpyrrolidone for nanoparticle-stabilizing pharmaceuticals. J Pharm Biomed Anal 2015; 117:419-25. [PMID: 26444751 DOI: 10.1016/j.jpba.2015.09.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 09/24/2015] [Accepted: 09/25/2015] [Indexed: 11/24/2022]
Abstract
Positron annihilation lifetime spectroscopy was applied to characterize free-volume structure of polyvinylpyrrolidone used as nonionic stabilizer in the production of many nanocomposite pharmaceuticals. The polymer samples with an average molecular weight of 40,000 g mol(-1) were pelletized in a single-punch tableting machine under an applied pressure of 0.7 GPa. Strong mixing in channels of positron and positronium trapping were revealed in the polyvinylpyrrolidone pellets. The positron lifetime spectra accumulated under normal measuring statistics were analysed in terms of unconstrained three- and four-term decomposition, the latter being also realized under fixed 0.125 ns lifetime proper to para-positronium self-annihilation in a vacuum. It was shown that average positron lifetime extracted from each decomposition was primary defined by long-lived ortho-positronium component. The positron lifetime spectra treated within unconstrained three-term fitting were in obvious preference, giving third positron lifetime dominated by ortho-positronium pick-off annihilation in a polymer matrix. This fitting procedure was most meaningful, when analysing expected positron trapping sites in polyvinylpyrrolidone-stabilized nanocomposite pharmaceuticals.
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Affiliation(s)
- O Shpotyuk
- Institute of Physics of Jan Dlugosz University in Czestochowa, 13/15, Al. Armii Krajowej, Czestochowa 42200, Poland; Vlokh Institute of Physical Optics, 23, Dragomanov Str., Lviv 79005, Ukraine.
| | - Z Bujňáková
- Institute of Geotechnics of Slovak Academy of Sciences, 45, Watsonova Str., Košice 04001, Slovakia
| | - P Baláž
- Institute of Geotechnics of Slovak Academy of Sciences, 45, Watsonova Str., Košice 04001, Slovakia
| | - A Ingram
- Opole University of Technology, 75, Ozimska Str., Opole 45370, Poland
| | - Y Shpotyuk
- Ivan Franko National University of Lviv, 1, Universytetska Str., 79000 Lviv, Ukraine; Centre for Innovation and Transfer of Natural Sciences and Engineering Knowledge, University of Rzeszow, 1, Pigonia Str., 35959 Rzeszow, Poland
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Massamba N, Dirani A, Knoeri J, Pasquier B, Ingram A, Soubrane G. Evaluating the impact of summer vacation on the visual acuity of AMD patients treated with ranibizumab. Eye (Lond) 2015. [PMID: 26206530 DOI: 10.1038/eye.2015.128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
PURPOSE To evaluate the impact of traditional French summer vacation on visual acuity and spectral domain-optical coherence tomography (SD-OCT) of Wet AMD patients being treated with intravitreal Ranibizumab. METHODS This was a consecutive, comparative, single-centre, prospective analysis. All patients who were being treated with intravitreal injection of 0.5 mg ranibizumab at Cergy Pontoise Hospital, Department of Ophthalmology between July 2013 and September 2014 were included. Patients were divided into two groups: (A) patients who skipped one ranibizumab intravitreal injection during holidays, and (B) patients who received injection during their holidays. Evaluations occurred prior to traditional holiday (baseline) and 2 months later, consisting of BCVA using ETDRS, and a complete ophthalmic examination that included slit-lamp biomicroscopy, fundus examination, fluorescein angiography (FA), indocyanine green angiography (ICGA), and spectral domain-optical coherence tomography (SD-OCT). All patients were being treated with PRN anti-VEGF regimen and criteria for reinjection included a visual acuity loss >5 ETDRS letters and/or an increase of central retinal thickness, presence of subretinal fluid, intraretinal fluid, or pigment epithelium detachment. If reinjection criteria were not met, patients were advised to return in 4 weeks. RESULTS The mean visual acuity change was -0.071 ± 0.149 (LogMAR) in group A and + 0.003 ± 0.178 in group B (P = 0.041). At the second visit (2 months after preholidays visit), 61.8% of patients in group A had SRF and/or intraretinal cysts, and only 27.6% of patients in group B. There was a significant difference in the persistence of fluid between the two groups (P = 0.007, χ(2)-test). CONCLUSION This cases series demonstrated the detrimental impact of holidays on visual acuity in patients treated with ranibizumab for AMD, which, in spite of their treatment regimen, still leave in vacation. Therefore, it is important to convey the message of treatment adherence to patients, despite their need of holidays.
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Affiliation(s)
- N Massamba
- Department of Ophthalmology, Cergy Pontoise Hospital, Paris, France
| | - A Dirani
- Department of Ophthalmology, CHUV, Lausanne, Switzerland
| | - J Knoeri
- Department of Ophthalmology, Cergy Pontoise Hospital, Paris, France
| | - B Pasquier
- Department of Ophthalmology, Cergy Pontoise Hospital, Paris, France
| | - A Ingram
- Department of Ophthalmology, April Ingram Research Consultants, Kelowna, British Columbia, Canada
| | - G Soubrane
- Department of Ophthalmology, Hotel Dieu Hospital, Paris V University, Paris, France
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Ruiz ES, Ingram A, Landriscina A, Tian J, Kirsner RS, Friedman A. Identifying an Education Gap in Wound Care Training in United States Dermatology. J Drugs Dermatol 2015; 14:716-720. [PMID: 26151788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
IMPORTANCE As restoration of the integument is paramount to wound healing, dermatologists should be central to managing wounds; yet this is often not the case. If a training gap exists during residency training, this may account for the observed discrepancy. OBJECTIVES To identify United States (US) dermatology residents' impressions regarding their preparedness to care for wounds, and to assess the amount and type of training devoted to wound care during residency. DESIGN, SETTING, AND PARTICIPANTS An online survey among current US dermatology residents enrolled in a residency training program. MAIN OUTCOMES AND MEASURES The primary goal was to determine whether dermatology residents believe more wound care education is needed, evaluate preparedness to care for wounds, and identify future plans to manage wounds. RESULTS Responses were received from 175 of 517 (33.8%) US Dermatology residents contacted. The majority of residents did not feel prepared to manage acute (78.3%) and chronic (84.6%) wounds. Over three quarters (77.1%) felt that more education is needed. Fewer than half (49.1% and 35.4%) of residents planned to care for acute and chronic wounds, respectively, when in practice. CONCLUSIONS AND RELEVANCE There is a gap in wound care education in US dermatology residency training. This translates to a low percentage of dermatology residents planning to care for wounds in future practice. Dermatology residents need to receive focused wound care training in order to translate the underpinnings of wound healing biology and ultimately better serve patients.
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Pore M, Ong G, Boyce C, Materazzi M, Gargiuli J, Leadbeater T, Sederman A, Dennis J, Holland D, Ingram A, Lettieri P, Parker D. A comparison of magnetic resonance, X-ray and positron emission particle tracking measurements of a single jet of gas entering a bed of particles. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.09.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Alberini F, Simmons M, Ingram A, Stitt E. Assessment of different methods of analysis to characterise the mixing of shear-thinning fluids in a Kenics KM static mixer using PLIF. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.03.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Alberini F, Simmons MJH, Ingram A, Stitt EH. Use of an areal distribution of mixing intensity to describe blending of non‐newtonian fluids in a kenics KM static mixer using PLIF. AIChE J 2013. [DOI: 10.1002/aic.14237] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- F. Alberini
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - M. J. H. Simmons
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - A. Ingram
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - E. H. Stitt
- Johnson Matthey Technology CentreBillinghamTS23 1LB U.K
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Ells AL, Gole GA, Lloyd Hildebrand P, Ingram A, Wilson CM, Geoff Williams R. Response to Dr Uparkar and Dr Kaul. Eye (Lond) 2013; 27:994-5. [PMID: 23680715 DOI: 10.1038/eye.2013.72] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Diemer J, Chilles C, Colbert J, Miri T, Ingram A, David P, Fard AS, Anderson PD. Flow Visualisation in Co-rotating Twin Screw Extruders: Positron Emission Particle Tracking and Numerical Particle Trajectories. INT POLYM PROC 2013. [DOI: 10.3139/217.2475] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Co-rotating twin-screw extruders are widely used compounding machines. They are mainly configured based on extensive experience and iterative approaches to optimise output and composite quality. The visualisation technology developed in the EU-project PEPTFlow allows visualisation of composite flow in twin-screw extruders under realistic processing conditions by tracking radioactive tracer particles in the polymer melt, using a specially developed camera system. This new approach allows polymer flow to be studied in different screw elements and screw configurations under realistic compounding conditions at normal temperatures and melt pressures. The paper presents the latest developments in the camera systems as well as the different ways to use and interpret the results. Detailed analysis of residence times and residence time distributions for standard compound screw elements, like kneading discs, conveying elements and reverse elements are presented. In addition for a better understanding of the flow field inside twin-screw extruders, numerical particle tracking is done. The Stokes equation, using XFEM method, are solved and the numerical RTD's (residence time distribution) are compared for various screw designs.
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Affiliation(s)
- J. Diemer
- Fraunhofer Institute for Chemical Technology, Pfinztal (Berghausen), Germany
| | - C. Chilles
- Smithers Rapra Technology Ltd,. Shawbury, United Kingdom
| | - J. Colbert
- Smithers Rapra Technology Ltd,. Shawbury, United Kingdom
| | - T. Miri
- School of Chemical Engineering, University of Birmingham, Birmingham, United Kingdom
| | - A. Ingram
- School of Chemical Engineering, University of Birmingham, Birmingham, United Kingdom
| | - P. David
- Sciences Computers Consultants, Saint Etienne, France
| | - A. Sarhangi Fard
- Materials Technology, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - P. D. Anderson
- Materials Technology, Eindhoven University of Technology, Eindhoven, The Netherlands
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Kozyukhin S, Veres M, Nguyen H, Ingram A, Kudoyarova V. Structural Changes in Doped Ge2Sb2Te5 Thin Films Studied by Raman Spectroscopy. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.phpro.2013.04.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Marigo M, Cairns D, Davies M, Ingram A, Stitt E. A numerical comparison of mixing efficiencies of solids in a cylindrical vessel subject to a range of motions. POWDER TECHNOL 2012. [DOI: 10.1016/j.powtec.2011.11.016] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
OBJECTIVE To determine the effectiveness of Parafricta low-friction garments in reducing the incidence and prevalence of pressure ulceration and to evaluate the curative aspects of these products on pre-existing skin breakdown within a hospital setting. METHOD Patients with a Waterlow score of >15 and who were unable to reposition independently were offered the low-friction undergarments and bootees. A total of 650 patient cases were initially reviewed. Of these, 204 met the criteria for use of the products in the 3 months prior to the start of the evaluation (cohort 1) and 165 patients met the criteria during the period when the garments were used (cohort 2). Data collected included pressure ulcer incidence, location, grading, and outcome of ulcer on discharge. Locally derived costs for length of stay, wound dressings, pressure-redistributing mattresses and additional cost of the low-friction garments were applied to build a cost-effectiveness model. RESULTS In patients at risk of skin breakdown there was a statistically significant reduction in the number of patients who developed pressure ulcers following use of the low-friction garments in cohort 2 when compared with cohort 1 (16% reduction; p = 0.0286). In addition, the number of patients who were ulcer free on admission but who developed ulcers and then improved or completely healed before discharge was also statistically significant (41% increase; p = 0.0065) when cohort 2 was compared with cohort 1. Fewer patients admitted with ulcers deteriorated when using the low-friction garments (21% reduction; p = 0.0012). The costs, which were calculated by comparing patient throughput for these patients, suggest that the savings associated with preventing skin breakdown outweighed the cost of the products used (base case model indicated a saving of over £63,000 per 100 at risk patients). CONCLUSION The results support the conclusion that low-friction garment products have a role to play in the prevention of skin breakdown, and appear to be both clinically effective and cost effective. DECLARATION OF INTEREST The authors have no conflicts of interest to declare. APA Parafricta provided the products, as well as financial support for training of the ward staff who participated in the evaluation and for the data collection and analysis (which was performed by Xcelerate Health Outcomes Unit, NHS Innovations London).
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Affiliation(s)
- G Smith
- Tissue Viability Nurse, St. Mary's Hospital, Isle of Wight, UK.
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