4,050 results on '"Fall, P"'
Search Results
102. Cognitive assessment in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS): a cognitive substudy of the multi-site clinical assessment of ME/CFS (MCAM)
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Gudrun Lange, Jin-Mann S. Lin, Yang Chen, Elizabeth A. Fall, Daniel L. Peterson, Lucinda Bateman, Charles Lapp, Richard N. Podell, Benjamin H. Natelson, Andreas M. Kogelnik, Nancy G. Klimas, and Elizabeth R. Unger
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myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) ,computerized neurocognitive screening ,longitudinal assessment ,speed and accuracy of performance ,executive function ,physical exertion ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
IntroductionPatients with Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) experience cognitive problems with attention, information processing speed, working memory, learning efficiency, and executive function. Commonly, patients report worsening of cognitive symptoms over time after physical and/or cognitive challenges. To determine, monitor, and manage longitudinal decrements in cognitive function after such exposures, it is important to be able to screen for cognitive dysfunction and changes over time in clinic and also remotely at home. The primary objectives of this paper were: (1) to determine whether a brief computerized cognitive screening battery will detect differences in cognitive function between ME/CFS and Healthy Controls (HC), (2) to monitor the impact of a full-day study visit on cognitive function over time, and (3) to evaluate the impact of exercise testing on cognitive dysfunction.MethodsThis cognitive sub-study was conducted between 2013 and 2019 across seven U.S. ME/CFS clinics as part of the Multi-Site Clinical Assessment of ME/CFS (MCAM) study. The analysis included 426 participants (261 ME/CFS and 165 HC), who completed cognitive assessments including a computerized CogState Brief Screening Battery (CBSB) administered across five timepoints (T0-T4) at the start of and following a full day in-clinic visit that included exercise testing for a subset of participants (182 ME/CFS and 160 HC). Exercise testing consisted of ramped cycle ergometry to volitional exhaustion. The primary outcomes are performance accuracy and latency (performance speed) on the computerized CBSB administered online in clinic (T0 and T1) and at home (T2-T4).ResultsNo difference was found in performance accuracy between ME/CFS and HCs whereas information processing speed was significantly slower for ME/CFS at most timepoints with Cohen’s d effect sizes ranging from 0.3–0.5 (p < 0.01). The cognitive decline over time on all CBSB tasks was similar for patients with ME/CFS independent of whether exercise testing was included in the clinic visit.ConclusionThe challenges of a clinic visit (including cognitive testing) can lead to further cognitive deficits. A single short session of intense exercise does not further reduce speed of performance on any CBSB tasks.
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- 2024
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103. Evaluating the effects of mental health e-learning on the knowledge, attitudes and practices of allied and healthcare professionals in Senegal
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Pierre-Emile Bruand, Thibaut Gelle, El Hadji Makhtar Ba, Jean Augustin Diegane Tine, Amy Fall Ndao, Line Kleinebreil, Driss Moussaoui, Pierre-Marie Preux, and Farid Boumediene
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e-learning ,Low- and middle-income countries ,Mental health ,Senegal ,Public aspects of medicine ,RA1-1270 - Abstract
Background: Despite the widespread prevalence and substantial burden of mental disorders, they remain significantly underdiagnosed and undertreated. In low- and middle-income countries like Senegal, integrating mental health services into primary care represents the most feasible strategy to bridge the treatment gap. This study aimed to assess the effects of a mental health e-learning program on the knowledge, attitudes, and practices of allied and healthcare professionals in Senegal. Methods: An e-learning platform including 12 interactive modules was used to train 322 allied and healthcare professionals. We evaluated changes in knowledge, attitudes, and practices, as well as in satisfaction with knowledge and in self-assessed ability to diagnose and manage patients, by comparing data collected before and after the e-learning modules. Qualitative feedback on the satisfaction with the various components of the program was also collected via a post-training survey. Outcomes: Knowledge, attitudes and practices scores increased significantly for all modules. Additionally, scores related to satisfaction with knowledge and ability to diagnose and manage patients showed significant improvements (+77.0 % and +75.0 %, respectively), surpassing the gains observed in knowledge, attitudes, and practices scores (+19.2 %, +11.1 % and +15.0 %, respectively). Mean scores regarding participants' satisfaction with the various elements of the program ranged from 8.1 to 9.1, out of a maximum of 10. Conclusion: Although only a limited number of participants completed all 12 modules, the mental health e-learning program showed positive results on the knowledge, attitudes, and practices of participants. It also increased their confidence and was perceived as a very positive experience by learners.
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- 2024
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104. Combretum micranthum G. Don (Combretaceae): Its physiological effects on hydro-electrolyte metabolism, renal tubular function and blood pressure
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Maïmouna Touré, Serge Manga, Mouhamadou A. Sakho, Alioune D. Fall, and Sidy M. Seck
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Combretum micranthum ,Kinkeliba ,Hydro-electrolyte metabolism ,Renal function ,Blood pressure ,Nutrition. Foods and food supply ,TX341-641 - Abstract
Background: Hydro-electrolyte balance is necessary to maintain body homeostasis and blood pressure values within narrow limits. This is accomplished, in part, by renal responses. We conducted this study to determine the effects of Combretum micranthum on hydro-electrolyte metabolism, renal function and arterial blood pressure. Subjects and methods: We conducted a pilot study including 40 subjects: 10 control subjects, 10 subjects under Combretum micranthum G. Don (400 mg/day), 10 subjects under furosemide (120 mg/day), and 10 subjects under spironolactone (50 mg/day).Anthropobiometric, cardiovascular parameters and the body composition were collected from each subject. Blood and 24-hour urine samples were collected for biological tests. Results: At baseline, clinical and biological parameters were comparable for all groups. Consumers of combretum micranthum had a significant decrease in global body fat percentage (−1.63 %; p = 0.045). In the group of combretum micranthum consumers, the body water mass (BWM) is significantly evolved in the direction of an increase (4.37; p = 0.023) and similar to what was observed in the group of subjects treated with spironolactone (0.67; p = 0.042). Consumption of combretum micranthum showed a marked reduction in hypertension indices (systolic blood pressure, diastolic blood pressure and heart rate) identical to that induced by consumption of furosemide or spironolactone. The consumption of combretum micranthum resulted in a significant reduction in kaliemia (−1.07; p
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- 2024
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105. Respiratory virus disease and outcomes at a large academic medical center in the United States: a retrospective observational study of the early 2023/2024 respiratory viral season
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Heba H. Mostafa, Amary Fall, Julie M. Norton, Jaiprasath Sachithanandham, Madeline Yunker, Omar Abdullah, Ann Hanlon, Linda Gluck, C. Paul Morris, Andrew Pekosz, and Eili Y. Klein
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influenza ,SARS-CoV-2 ,respiratory syncytial virus ,enterovirus ,rhinovirus ,genome analysis ,Microbiology ,QR1-502 - Abstract
ABSTRACT Respiratory disease, attributed to influenza, respiratory syncytial virus (RSV), and SARS-CoV-2, was reported nationally during the 2023/2024 respiratory viral season. The emergence of novel SARS-CoV-2 variants was considered a significant factor contributing to the rise in COVID-19 cases. Data from the Johns Hopkins Hospital System (JHHS) showed that enterovirus/rhinovirus had also been circulating at high rates. Analyzing clinical outcomes of the most prevalent respiratory viruses is crucial for understanding the role of circulating viral genotypes. A retrospective cohort of patients who tested positive for SARS-CoV-2, influenza, RSV, or enterovirus/rhinovirus between 1 June and 31 December 2023 was included in the study. Remnant clinical samples were utilized for targeted viral whole-genome sequencing and genotyping. Patients’ metadata and outcomes following infection were studied, stratified by viral variants and genotypes. The increase of SARS-CoV-2 positivity in December was associated with the predominance of JN.1. Admissions for patients under 18 years old were primarily associated with enterovirus/rhinovirus and RSV, while older age groups were mainly linked to SARS-CoV-2 and influenza infections. SARS-CoV-2-related admissions increased with the predominance of the JN.1 variant in December. No significant difference in admissions for influenza subtypes, rhinovirus species, or SARS-CoV-2 variants was observed. RSV A was associated with slightly higher odds of admission compared with RSV B. Our data highlight the importance of systematically analyzing respiratory viral infections to inform public health strategies and clinical management, especially as SARS-CoV-2 becomes endemic. The findings highlight the value of expanded genomic surveillance in elucidating the clinical significance of viral evolution.IMPORTANCEThe analysis of the epidemiology and clinical outcomes of multiple co-circulating respiratory viruses in the early 2023/2024 respiratory virus season highlights the emergence of the SARS-CoV-2 JN.1 variant as well as underscores the importance of enterovirus/rhinovirus in respiratory infections. Understanding these dynamics is essential for refining public health strategies and clinical management, especially as SARS-CoV-2 transitions to an endemic status. This work emphasizes the need for ongoing surveillance, robust diagnostic algorithms, and detailed genomic analyses to anticipate and mitigate the burden of respiratory viral infections, ultimately contributing to more informed decision-making in healthcare settings and better patient outcomes.
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- 2024
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106. Impairment of hippocampal astrocyte-mediated striatal dopamine release and locomotion in Alzheimer's disease
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Benjamin B. Tournier, Kelly Ceyzériat, Aurélien M. Badina, Yesica Gloria, Aïda B. Fall, Quentin Amossé, Stergios Tsartsalis, and Philippe Millet
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Alzheimer's disease ,TgF344-AD ,Astrocytes ,Dopamine ,Brain activity ,AAV vector gene therapy ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Background: Clinical and translational research has identified deficits in the dopaminergic neurotransmission in the striatum in Alzheimer's disease (AD) and this could be related to the pathophysiology of psychiatric symptoms appearing even at early stages of the pathology. Hypothesis: We hypothesized that AD pathology in the hippocampus may influence dopaminergic neurotransmission even in the absence of AD-related lesion in the mesostriatal circuit. Methods: We chemogenetically manipulated the activity of hippocampal neurons and astrocytes in wild-type and hemizygous TgF344-AD (Tg) rats, an animal model of AD pathology. We assessed the brain-wide functional output of this manipulation using in vivo Single Photon Emission Computed Tomography to measure cerebral blood flow and D2/3 receptor binding, in response to acute (3 mg kg-1 i.p.) and chronic (0.015 mg/ml in drinking water, 28 days) stimulation of neurons or astrocytes with clozapine N-oxide. We also assessed the effects of the chronic chemogenetic manipulations on D2 receptor density, low or high aggregated forms of amyloid Aβ40 and Aβ42, astrocytes and microglial reactivity, and the capacity of astrocytes and microglia to surround and phagocytize Aβ both locally and in the striatum. Results: We showed that acute and chronic neuronal and astrocytic stimulation induces widespread effects on the brain regional activation pattern, notably with an inhibition of striatal activation. In the Tg rats, both these effects were blunted. Chemogenetic stimulation in the hippocampus increased microglial density and its capacity to limit AD pathology, whereas these effects were absent in the striatum perhaps as a consequence of the altered connectivity between the hippocampus and the striatum. Conclusions: Our work suggests that hippocampal AD pathology may alter mesostriatal signalling and induce widespread alterations of brain activity. Neuronal and astrocytic activation may induce a protective, Aβ-limiting phenotype of microglia, which surrounds Aβ plaques and limits Αβ concentration more efficiently.
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- 2024
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107. Evidence from Finland and Sweden on the relationship between early-life diseases and lifetime childlessness in men and women
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Liu, Aoxing, Akimova, Evelina T., Ding, Xuejie, Jukarainen, Sakari, Vartiainen, Pekka, Kiiskinen, Tuomo, Koskelainen, Sara, Havulinna, Aki S., Gissler, Mika, Lombardi, Stefano, Fall, Tove, Mills, Melinda C., and Ganna, Andrea
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- 2024
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108. Markers of imminent myocardial infarction
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Gustafsson, Stefan, Lampa, Erik, Jensevik Eriksson, Karin, Butterworth, Adam S., Elmståhl, Sölve, Engström, Gunnar, Hveem, Kristian, Johansson, Mattias, Langhammer, Arnulf, Lind, Lars, Läll, Kristi, Masala, Giovanna, Metspalu, Andres, Moreno-Iribas, Conchi, Nilsson, Peter M., Perola, Markus, Simell, Birgit, Sipsma, Hemmo, Åsvold, Bjørn Olav, Ingelsson, Erik, Hammar, Ulf, Ganna, Andrea, Svennblad, Bodil, Fall, Tove, and Sundström, Johan
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- 2024
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109. Strength development and self-desiccation of saline cemented paste backfill
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Carnogursky, Elizabeth Alexandra, Fall, Mamadou, and Haruna, Sada
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- 2024
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110. Using the ectomycorrhizal symbiosis between Coccoloba uvifera L. and Scleroderma bermudense Coker to restore a degraded coastal sand dune in Cuba
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Galardis, M. M. Bullaín, Sánchez, R. C. López, Pruneau, L., Eichler-Lobermann, B., Fall, F., and Bâ, A. M.
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- 2024
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111. Ecological Factors of Telemental Healthcare Utilization Among Adolescents with Increased Substance Use During the COVID-19 Pandemic: The Moderating Effect of Gender
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Kim, Youn Kyoung, Small, Eusebius, Pounders, Rachel D., Fall, Salimata Lala, and Wilson, Wendy L.
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- 2024
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112. Understanding the relation between reading and anxiety among upper elementary students with reading difficulties
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Fishstrom, Sarah, Capin, Philip, Fall, Anna-Mari, Roberts, Gregory, Grills, Amie E., and Vaughn, Sharon
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- 2024
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113. Pulmonary function and atherosclerosis in the general population: causal associations and clinical implications
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Engström, Gunnar, Lampa, Erik, Dekkers, Koen, Lin, Yi-Ting, Ahlm, Kristin, Ahlström, Håkan, Alfredsson, Joakim, Bergström, Göran, Blomberg, Anders, Brandberg, John, Caidahl, Kenneth, Cederlund, Kerstin, Duvernoy, Olov, Engvall, Jan E., Eriksson, Maria J., Fall, Tove, Gigante, Bruna, Gummesson, Anders, Hagström, Emil, Hamrefors, Viktor, Hedner, Jan, Janzon, Magnus, Jernberg, Tomas, Johnson, Linda, Lind, Lars, Lindberg, Eva, Mannila, Maria, Nilsson, Ulf, Persson, Anders, Persson, Hans Lennart, Persson, Margaretha, Ramnemark, Anna, Rosengren, Annika, Schmidt, Caroline, Skoglund Larsson, Linn, Sköld, C. Magnus, Swahn, Eva, Söderberg, Stefan, Torén, Kjell, Waldenström, Anders, Wollmer, Per, Zaigham, Suneela, Östgren, Carl Johan, and Sundström, Johan
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- 2024
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114. The Effect of Addition and Subtraction Practice within a Word-Problem Intervention on Addition and Subtraction Outcomes
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Powell, Sarah R., Akther, Syeda Sharjina, Yoon, Na Young, Berry, Katherine A., Nemcek, Carmen, Fall, Anna-Maria, and Roberts, Greg
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This study examined the influence of addition and subtraction practice embedded within a word-problem intervention for Grade 3 students experiencing word-problem difficulty. Students (N = 448) were randomly assigned to one of two variants of a word-problem intervention or a business-as-usual comparison condition. Within the word-problem interventions, students participated in targeted addition and subtraction fact and computation practice for approximately 3 minutes of each 30-minute session across 47 intervention sessions, but also continually practiced addition and subtraction through word-problem solving. At posttest, students who participated in the intervention demonstrated improved single-digit addition and subtraction performance as well as improved double-digit addition and subtraction performance. At follow-up in Grade 4, persistence of effects was only identified for double-digit addition. Considering addition and subtraction are foundational to many other mathematics skills, addition and subtraction practice serves as an important component of mathematics intervention.
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- 2023
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115. Application of near-infrared spectroscopy for fast germplasm analysis and classification in multi-environment using intact-seed peanut (Arachis hypogaea L.)
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Fentanesh Chekole Kassie, Gilles Chaix, Hermine Bille Ngalle, Maguette Seye, Coura Fall, Hodo-Abalo Tossim, Aissatou Sambou, Olivier Gibert, Fabrice Davrieux, Joseph Martin Bell, Jean-François Rami, Daniel Fonceka, and Joël Romaric Nguepjop
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Groundnut ,Oilseed ,Near infrared spectroscopy ,Germplasm analysis ,Environment ,Nutritional ,Genetics ,QH426-470 - Abstract
Peanut is a worldwide oilseed crop and the need to assess germplasm in a non-destructive manner is important for seed nutritional breeding. In this study, Near Infrared Spectroscopy (NIRS) was applied to rapidly assess germplasm variability from whole seed of 699 samples, field-collected and assembled in four genetic and environment-based sets: one set of 300 varieties of a core-collection and three sets of 133 genotypes of an interspecific population, evaluated in three environments in a large spatial scale of two countries, Mbalmayo and Bafia in Cameroon and Nioro in Senegal, under rainfed conditions. NIR elemental spectra were gathered on six subsets of seeds of each sample, after three rotation scans, with a spectral resolution of 16 cm-1 over the spectral range of 867 nm to 2530 nm. Spectra were then processed by principal component analysis (PCA) coupled with Partial least squares-discriminant analysis (PLS-DA). As results, a huge variability was found between varieties and genotypes for all NIR wavelength within and between environments. The magnitude of genetic variation was particularly observed at 11 relevant wavelengths such as 1723 nm, usually related to oil content and fatty acid composition. PCA yielded the most chemical attributes in three significant PCs (i.e., eigenvalues >10), which together captured 93% of the total variation, revealing genetic and environment structure of varieties and genotypes into four clusters, corresponding to the four samples sets. The pattern of genetic variability of the interspecific population covers, remarkably half of spectrum of the core-collection, turning out to be the largest. Interestingly, a PLS-DA model was developed and a strong accuracy of 99.6% was achieved for the four sets, aiming to classify each seed sample according to environment origin. The confusion matrix achieved for the two sets of Bafia and Nioro showed 100% of instances classified correctly with 100% at both sensitivity and specificity, confirming that their seed quality was different from each other and all other samples. Overall, NIRS chemometrics is useful to assess and distinguish seeds from different environments and highlights the value of the interspecific population and core-collection, as a source of nutritional diversity, to support the breeding efforts.
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- 2024
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116. Self-desiccation behavior of nano-cemented tailings backfill plug: Insights from thermo-mechanical-chemical column experiments
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Amirreza Saremi and Mamadou Fall
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Cemented paste backfill ,Tailings ,Mine ,Nanoparticles ,Plug ,Non-isothermal temperature ,Mining engineering. Metallurgy ,TN1-997 - Abstract
This paper examines the influence of various factors, including the addition of nano-calcium carbonate particles (chemical processes, C) to CPBs, non-isothermal field curing temperatures (thermal factor, T), and field vertical curing stress (mechanical factor, M), on the self-desiccation capacity of CPB plugs. The assessment of self-desiccation involves the determination of pore water pressure (PWP) and volumetric water content (VWC) in the examined CPBs. Thermo-mechanical-chemical (TMC) column experiments were conducted to investigate the interaction among these factors and their collective impact on the evolution of PWP and VWC within the CPB plug. The findings underscore that each factor, both individually and in combination, significantly affects the magnitude and progression of self-desiccation in CPB plugs. Notably, the factors of elevated field temperature and the introduction of nano-calcium carbonate (NC) to the CPB exert the most substantial influence on the extent and enhancement of self-desiccation, whereas the impact of field curing stress in isolation is comparatively much weaker. The integration of nano-calcium carbonate, especially under non-isothermal conditions and concurrent field stress, emerges as a key contributor to enhanced PWP and VWC dissipation rates. The role of non-isothermal field curing temperature is underscored as a significant contributing factor in the self-desiccation of CPB plugs. The results presented in this paper will contribute to a more cost-effective design of CPB plugs and the improved optimization of CPB mixtures with nano-calcium carbonate particles.
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- 2024
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117. SARS-CoV-2 infection associated with hemopathies: An experience of a clinical hematology center in sub-Saharan Africa, Senegal
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El Hadji Daouda Niang, Serge Mwamba, Khadim Sarr, Soumaré Pape Maserigne, Ibrahima Gaye, Louis Fortes, Seynabou Fall, and Fatou Samba Diago Ndiaye
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benign hemopathy ,malignant hemopathy ,sars-cov-2 ,senegal ,Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
INTRODUCTION: Many studies have reported the association of SARS-CoV-2 with benign and malignant hemopathies. Data from African series are scarce. This work was conducted in sub-Saharan Africa and aimed to study the clinical, biological, and evolutionary features of hemopathies associated with this infection. MATERIALS AND METHODS: It was a retrospective, cross-sectional study carried out over 32 months including 86 patients with benign or malignant hemopathies who underwent coronavirus disease-2019 (COVID-19) confirmed by the real-time reverse transcriptase-polymerase chain reaction or presenting with atypical clinical signs associated with highly suggestive computed tomography (CT) scan signs. RESULTS: The mean age of patients was 48.3 ± 18.7 years with a sex ratio of 0.75. The main benign hemopathies were sickle cell trait (SCT) (n = 51), sickle cell disease SS (n = 8), and sickle cell disease SC (n = 1), while malignant hemopathies were represented by multiple myeloma (n = 5), non-Hodgkin lymphoma (n = 5), and chronic lymphocytic leukemia (n = 4). The clinical symptoms mainly featured anemic syndrome (16.3%) and a vaso-occlusive crisis was found in 9.3% of homozygous sickle-cell patients. The infection was moderate in 48% of cases and severe in 19.7%. The severe forms were commonly found in patients with malignant hemopathies (47.6%) and the benign forms were noted in benign hemopathies (38.4%). Full blood count outlined anemia in 32.5% and lymphopenia in 23.2% of cases. On imaging, the CT scan reported severe lesions in 41.3% of cases. The outcome resulted in full recovery in 76.7% of cases, and mortality occurred in 23.3%. In univariate analysis, death was mainly noted in patients with lymphoid hemopathies (15%). Comorbidities (P < 0.0001), lymphoid hemopathies (P < 0.0001), and the severity of COVID-19 (P < 0.0001) had a positive impact on death occurrence in univariate analysis. CONCLUSION: The association between SARS-CoV-2 and hemopathy is not uncommon and is dominated by benign hemopathies. Malignant hemopathies are at-risk underlying conditions justifying a hospital follow-up of mild forms, allowing better survival. Particular attention must be paid to SCT with comorbidities and those with sickle cell disease of disease.
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- 2024
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118. Analysis of plasma metabolomes from 11 309 subjects in five population-based cohorts
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Nilanjana Ghosh, Carl Lejonberg, Tomasz Czuba, Koen Dekkers, Richard Robinson, Johan Ärnlöv, Olle Melander, Maya Landenhed Smith, Anne M. Evans, Olof Gidlöf, Robert E. Gerszten, Lars Lind, Gunnar Engström, Tove Fall, and J. Gustav Smith
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Medicine ,Science - Abstract
Abstract Plasma metabolomics holds potential for precision medicine, but limited information is available to compare the performance of such methods across multiple cohorts. We compared plasma metabolite profiles after an overnight fast in 11,309 participants of five population-based Swedish cohorts (50–80 years, 52% women). Metabolite profiles were uniformly generated at a core laboratory (Metabolon Inc.) with untargeted liquid chromatography mass spectrometry and a comprehensive reference library. Analysis of a second sample obtained one year later was conducted in a subset. Of 1629 detected metabolites, 1074 (66%) were detected in all cohorts while only 10% were unique to one cohort, most of which were xenobiotics or uncharacterized. The major classes were lipids (28%), xenobiotics (22%), amino acids (14%), and uncharacterized (19%). The most abundant plasma metabolome components were the major dietary fatty acids and amino acids, glucose, lactate and creatinine. Most metabolites displayed a log-normal distribution. Temporal variability was generally similar to clinical chemistry analytes but more pronounced for xenobiotics. Extensive metabolite-metabolite correlations were observed but mainly restricted to within each class. Metabolites were broadly associated with clinical factors, particularly body mass index, sex and renal function. Collectively, our findings inform the conduct and interpretation of metabolite association and precision medicine studies.
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- 2024
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119. Reemergence of Sylvatic Dengue Virus Serotype 2 in Kedougou, Senegal, 2020
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Idrissa Dieng, Maryam Diarra, Bacary Djilocalisse Sadio, Bocar Sow, Alioune Gaye, Amadou Diallo, Martin Faye, Marie Henriette Dior Ndione, Diawo Diallo, Safietou Sankhe, Mignane Ndiaye, Fode Danfakha, Boly Diop, Amadou Alpha Sall, Gamou Fall, Oumar Faye, Cheikh Loucoubar, Ousmane Faye, Scott C. Weaver, Mawlouth Diallo, Mamadou Aliou Barry, and Moussa Moise Diagne
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sylvatic dengue virus serotype 2 ,dengue ,outbreak ,mosquito ,vector-borne infections ,viruses ,Medicine ,Infectious and parasitic diseases ,RC109-216 - Abstract
In 2020, a sylvatic dengue virus serotype 2 infection outbreak resulted in 59 confirmed dengue cases in Kedougou, Senegal, suggesting those strains might not require adaptation to reemerge into urban transmission cycles. Large-scale genomic surveillance and updated molecular diagnostic tools are needed to effectively prevent dengue virus infections in Senegal.
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- 2024
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120. Quality assessment of malaria microscopic diagnosis at the Aristide Le Dantec University Hospital of Dakar, Senegal, in 2020
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Mamane N. Garba, Awa B. Dème, Khadim Diongue, Younousse Diédhiou, Amadou M. Mbaye, NDèye M. Dia, N’Dèye A. Seck, Daba Zoumarou, Lamine Ndiaye, Mamadou S. Yade, Baba Dièye, Aita Sène, Abdoulaye Tine, Mariama Touré, Nogaye Gadiaga, Awa Fall, Bassirou Ngom, Djiby Sow, Aliou Ndiaye, Astou Keita, Mame F. Ndiaye, Jules F. Gomis, Nana F. Diop, Guète Diallo, Ibrahima M. Ndiaye, Elhadj M. Ba, Omar Bitèye, Cheikh Ndiaye, Fama S. D. Mbodji, Pape O. Ndiaye, Tolla Ndiaye, Amy Gaye, Mouhamad Sy, Yaye D. Ndiaye, Mame C. Seck, Mouhamadou Ndiaye, Aida S. Badiane, Mamadou A. Diallo, and Daouda Ndiaye
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Plasmodium ,Diagnosis ,Sensitivity ,Specificity ,Senegal ,Medicine ,Biology (General) ,QH301-705.5 ,Science (General) ,Q1-390 - Abstract
Abstract Background Following WHO guidelines, microscopy is the gold standard for malaria diagnosis in endemic countries. The Parasitology-Mycology laboratory (LPM) is the National Reference Laboratory and is currently undergoing ISO 15189 accreditation. In this context, we assessed the performance of the laboratory by confirming the reliability and the accuracy of results obtained in accordance with the requirements of the ISO 15189 standards. This study aimed to verify the method of microscopic diagnosis of malaria at the LPM, in the Aristide Le Dantec hospital (HALD) in Dakar, Senegal. Methods This is a validation/verification study conducted from June to August 2020. Twenty (20) microscopic slides of thick/thin blood smear with known parasite densities (PD) selected from the Cheick Anta Diop University malaria slide bank in Dakar were used for this assessment. Six (6) were used to assess microscopists’ ability to determine PD and fourteen (14) slides were used for detection (positive vs negative) and identification of parasites. Four (4) LPM-HALD microscopists read and recorded their results on prepared sheets. Data analysis was done with Microsoft Excel 2010 software. Results A minimum threshold of 50% concordance was used for comparison. Of the twenty (20) slides read, 100% concordance was obtained on eight (8) detection (positive vs negative) slides. Four (4) out of the six (6) parasite density evaluation slides obtained a concordance of less than 50%. Thirteen (13) out of the fourteen (14) identification slides obtained a concordance greater than 50%. Only one (1) identification slide obtained zero agreement from the microscopists. For species identification a concordance greater than 80% was noted and the microscopists obtained scores between 0.20 and 0.4 on a scale of 0 to 1 for parasite density reading. The microscopists obtained 100% precision, sensitivity, specificity and both negative and positive predictive values. Conclusion This work demonstrated that the microscopic method of malaria diagnosis used in the LPM/HALD is in accordance with the requirements of WHO and ISO 15189. Further training of microscopists may be needed to maintain competency.
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- 2024
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121. Assessing the Effects of Guiera senegalensis, Pluchea odorata, and Piliostigma reticulatum Leaf Powder Supplementation on Growth, Immune Response, Digestive Histology, and Survival of Nile Tilapia (Oreochromis niloticus Linnaeus, 1758) Juveniles before and after Aeromonas hydrophila Infection
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Paul M. Ndour, Jean Fall, Maria J. Darias, Domenico Caruso, Marc Canonne, Elodie Pepey, Sophie Hermet, Sokhna K. L. Fall, Malick Diouf, and Samira Sarter
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Aeromonas hydrophila ,growth ,immunity ,medicinal plants ,Nile tilapia ,histology ,Biology (General) ,QH301-705.5 ,Genetics ,QH426-470 - Abstract
The effects of three medicinal plants in the feeds of juvenile Nile tilapia (Oreochromis niloticus) were investigated on growth, survival, immunity, and digestive histology at various inclusion levels: (A) Guiera senegalensis at 0, 1, 2, 4, and 8%; (B) Pluchea odorata at 0, 0.5, 1, 2, and 4%; (C) Piliostigma reticulatum at 0, 1, and 2%; and (D) a mixture of the three at 0, 1, and 2%. After 28 days of feeding, fish were infected with Aeromonas hydrophila for 12 days. The results showed that, except for G. senegalensis, the inclusion of the medicinal plants, alone or combined, enhanced the immune response. The diet with 4% P. odorata significantly increased plasma lysozyme and bactericidal activities without affecting feed conversion efficiency or growth. Despite improved immunity, none of the treatments enhanced post-infection survival rates. However, fish fed the 1% mixture showed healthier livers and intestines, with reduced cell swelling and normal lipid deposits, followed by the 2% mixture and the control. These results highlight the potential benefits of incorporating P. odorata and the plant mixture into the diets of Nile tilapia juveniles for enhancing their immune response against A. hydrophila.
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- 2024
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122. The Differential Efficacy of a Professional Development Model on Reading Outcomes for Students with and without Disabilities
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Swanson, Elizabeth, Vaughn, Sharon, Fall, Anna-Maria, Stevens, Elizabeth A., Stewart, Alicia A., Capin, Philip, and Roberts, Greg
- Abstract
This study examined the differential effects of Strategies for Reading Informational Text and Vocabulary Effectively (STRIVE) on the vocabulary, reading comprehension, and content learning among 4,757 fourth-grade students with and without disabilities. Schools were assigned to one of three conditions: researcher-supported professional development (RPD), school-supported professional development (SPD), or business as usual (BAU). Treatment teachers received 12 hr of professional development distributed over time and delivered a set of instructional practices for teaching vocabulary and comprehension embedded within 36 social studies lessons (45 min per lesson). Findings revealed that students with and without disabilities in classes assigned to STRIVE treatment (SPD and RPD) outperformed their peers in classes assigned to the BAU condition at a statistically significant level on measures of content knowledge and content vocabulary and a distal measure of vocabulary. STRIVE did not affect students with disabilities (SWDs) and without disabilities differentially on the measures of content knowledge and distal vocabulary, though effects sizes for non-SWDs in SPD and RPD were larger than those for SWDs. [For the corresponding grantee submission, see ED612377.]
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- 2021
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123. The impact of spurious collisional heating on the morphological evolution of simulated galactic discs
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Wilkinson, Matthew J., Ludlow, Aaron D., Lagos, Claudia del P., Fall, S. Michael, Schaye, Joop, and Obreschkow, Danail
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Astrophysics - Astrophysics of Galaxies - Abstract
We use a suite of idealised N-body simulations to study the impact of spurious heating of star particles by dark matter particles on the kinematics and morphology of simulated galactic discs. We find that spurious collisional heating leads to a systematic increase of the azimuthal velocity dispersion ($\sigma_\phi$) of stellar particles and a corresponding decrease in their mean azimuthal velocities ($\overline{v}_\phi$). The rate of heating is dictated primarily by the number of dark matter halo particles (or equivalently, by the dark matter particle mass at fixed halo mass) and by radial gradients in the local dark matter density along the disc; it is largely insensitive to the stellar particle mass. Galaxies within haloes resolved with fewer than $\approx 10^6$ dark matter particles are particularly susceptible to spurious morphological evolution, irrespective of the total halo mass (with even more particles required to prevent heating of the galactic centre). Collisional heating transforms galactic discs from flattened structures into rounder spheroidal systems, causing them to lose rotational support in the process. It also affects the locations of galaxies in standard scaling relations that link their various properties: at fixed stellar mass, it increases the sizes of galaxies, and reduces their mean stellar rotation velocities and specific angular momenta. Our results urge caution when extrapolating simulated galaxy scaling relations to low masses where spurious collisional effects can bias their normalisation, slope and scatter., Comment: Minor changes to match MNRAS published version. 20 pages, 13 figures
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- 2022
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124. Accuracy of Real-Time Echo-Planar Imaging Phase Contrast MRI
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Liu, Pan, Fall, Sidy, and Baledent, Olivier
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Electrical Engineering and Systems Science - Signal Processing - Abstract
Compared with CINE phase contrast MRI (CINE-PC), echo-planar imaging phase contrast (EPI-PC) can achieve realtime quantification of blood flow, with lower SNR. In this study, the pulsating real model of the simulated cerebral vasculature was used to verify the accuracy of EPI-PC. The imaging time of EPI-PC was 62ms/image at 100*60 spatial resolution. The reconstructed EPI-PC flow curve was extracted by homemade post-processing software. After comparison with the CINE-PC flow curve, it was concluded that EPI-PC can provide an average flow with less than 3% error, and its flow curve will be similar to the CINE-PC flow curve in shape., Comment: ISMRM 2021-International Society for Magnetic Resonance in Medicine, May 2021, Online, France
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- 2022
125. Cerebro spinal fluid dynamic in front of cardiac and breathing influence
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Baledent, Olivier, Liu, Pan, Metanbou, Serge, Capel, Cyrille, Fall, Sidy, and Bouzerar, Roger
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Electrical Engineering and Systems Science - Signal Processing - Abstract
It is still debated how breathing interacts with the CSF. New Phase contrast MRI sequence based on Echo Planar imaging (EPI-PC) can now produce continuously during minutes a velocity map, more or less every 100 ms. We did not found in the literature quantitative evaluation of the CSF stroke volume change during breathing. The aim of this work is to quantify CSF dynamics change in the aqueduct and in the spinal canal during the breathing and cardiac period using EPI-PC., Comment: ISMRM 2021-International Society for Magnetic Resonance in Medicine, May 2021, Online, France
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- 2022
126. Real-Time Phase Contrast MRI to quantify Cerebral arterial flow change during variations breathing
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Liu, Pan, Fall, Sidy, Metanbou, Serge, and Balédent, Olivier
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Electrical Engineering and Systems Science - Signal Processing - Abstract
Cerebral arterial blood flow (CABF) can be investigated in few seconds without any synchronization by Real-Time phase contrast. Significant changes in CABF were found between expiration and inspiration during normal breathing of healthy volunteers. Synopsis (100/100) Real-time phase contrast MRI has been applied to investigate cerebral arterial blood flow (CABF) during normal breathing of healthy volunteers. We developed a novel time-domain analysis method to quantify the effect of normal breathing on several parameters of CABF. We found the existence of a delay between the recorded respiratory signal from the belt sensor and the breathing frequency component present in the reconstructed arterial blood flows. During the expiratory, the mean flow rate of CABF increased by 4.4$\pm$1.7%, stroke volume of CABF increased by 9.8$\pm$3.1% and the duration of the cardiac period of CABF increased by 8.1$\pm$3%., Comment: ISMRM 2022-International Society for Magnetic Resonance in Medicine, May 2022, London, United Kingdom
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- 2022
127. Flow 2.0 -a flexible, scalable, cross-platform post-processing software for realtime phase contrast sequences
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Liu, Pan, Fall, Sidy, and Balédent, Olivier
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Electrical Engineering and Systems Science - Signal Processing - Abstract
Flow 2.0 is an end-to-end easy-of-use software that allows us to quickly, robustly and accurately perform a batch process real-time phase contrast data and multivariate analysis of the effect of respiration on cerebral fluids circulation. Synopsis (99/100) Real-time phase contrast sequences (RT-PC) have potential value as a scientific and clinical tool in quantifying the effects of respiration on cerebral circulation. To simplify its complicated post-processing process, we developed Flow 2.0 software, which provides a complete post-processing workflow including converting DICOM data, image segmentation, image processing, data extraction, background field correction, antialiasing filter, signal processing and analysis and a novel time-domain method for quantifying the effect of respiration on the cerebral circulation. This end-to-end software allows us to quickly, robustly and accurately perform batch process RT-PC and multivariate analysis of the effects of respiration on cerebral circulation., Comment: ISMRM 2022-International Society for Magnetic Resonance in Medicine, May 2022, London, United Kingdom
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- 2022
128. Dark matter halos and scaling relations of extremely massive spiral galaxies from extended HI rotation curves
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Di Teodoro, Enrico M., Posti, Lorenzo, Fall, S. Michael, Ogle, Patrick M., Jarrett, Thomas, Appleton, Philip N., Cluver, Michelle E., Haynes, Martha P., and Lisenfeld, Ute
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Astrophysics - Astrophysics of Galaxies - Abstract
We present new and archival atomic hydrogen (\hi) observations of \galnum\ of the most massive spiral galaxies in the local Universe ($M_\star>10^{11} \, \mathrm{M}_\odot$). From 3D kinematic modeling of the datacubes, we derive extended \hi\ rotation curves, and from these, we estimate masses of the dark matter halos and specific angular momenta of the discs. We confirm that massive spiral galaxies lie at the upper ends of the Tully-Fisher relation (mass vs velocity, $M \propto V^{4}$) and Fall relation (specific angular momentum vs mass, $j \propto M^{0.6}$), in both stellar and baryonic forms, with no significant deviations from single power laws. We study the connections between baryons and dark matter through the stellar (and baryon)-to-halo ratios of mass $f_\mathrm{M} \equiv M_\star/M_\mathrm{h}$ and specific angular momentum $f_\mathrm{j} \equiv j_\star/j_\mathrm{h}$ and $f_\mathrm{j,bar} \equiv j_\mathrm{bar}/j_\mathrm{h}$. Combining our sample with others from the literature for less massive disc-dominated galaxies, we find that $f_\mathrm{M}$ rises monotonically with $M_\star$ and $M_\mathrm{h}$ (instead of the inverted-U shaped $f_\mathrm{M}$ for spheroid-dominated galaxies), while $f_\mathrm{j}$ and $f_\mathrm{j,bar}$ are essentially constant near unity over four decades in mass. Our results indicate that disc galaxies constitute a self-similar population of objects closely linked to the self-similarity of their dark halos. This picture is reminiscent of early analytical models of galaxy formation wherein discs grow by relatively smooth and gradual inflow, isolated from disruptive events such as major mergers and strong AGN feedback, in contrast to the more chaotic growth of spheroids., Comment: Accepted for publication on MNRAS
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- 2022
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129. New hybrid organic-inorganic ferrophotovoltaic perovskites nanoparticles with high voltage for indoor and IoT applications
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Ndioukane, Rémi, Baldé, Fanta, Fall, Ndéye C. Y., Kobor, Diouma, and Motte, Laurence
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Condensed Matter - Other Condensed Matter ,Condensed Matter - Materials Science ,Physics - Applied Physics - Abstract
The ideal band gap for a photovoltaic active layer for the solar spectrum is around 1.3 eV. However oxides with such values are rare. One of the most studied oxides to date as a photovoltaic active layer is the cuprous oxide Cu2O. Its band gap is around 2.1 eV and is therefore not ideal for the solar spectrum. Power Conversion Efficiency generally do not exceed 4%. In this paper we propose to study an emerging type of solar cell that is based on ferroelectricity. In this type of solar cell, a p-n junction is not necessarily required, unlike conventional solar cells. Interesting conversion efficiencies are beginning to be obtained with this type of cell, however the mechanisms are still not well understood and several material and engineering challenges must be addressed. The objective of this paper is to initiate an innovative photovoltaic technology based on novel inorganic with suitable bandgap widths and organic materials (biopolymer). These oxides are more stables. We synthesized ferroelectric materials that absorb a large part of the solar spectrum with reduced bandgap widths. PZN-4.5PT nanoparticles were dispersed in a biopolymer matrix. Hybrid thin films with these inorganic nanoparticles embedded in a biopolymer have been successfully fabricated by spin coating on ITO substrate. Structural, morphological and electrical properties were investigated. The best Power Conversion Efficiencies measure under a light LED illumination of 3550 lux are respectively 21.83 % and 31.62 % for 15 and 30 min light exposition with an open-circuit voltage of 5.17 and 5.86 V.
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- 2022
130. Genomic characterization of a reemerging Chikungunya outbreak in Kedougou, Southeastern Senegal, 2023
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Idrissa Dieng, Bacary Djilocalisse Sadio, Alioune Gaye, Samba Niang Sagne, Marie Henriette Dior Ndione, Mouhamed Kane, Mamadou Korka Diallo, Bocar Sow, Safietou Sankhe, Ousseynou Sene, Amadou Diallo, Madeleine Dieng, Serge Freddy Moukaha Doukanda, Maimouna Mbanne, Seynabou Mbaye Ba Souna Diop, Diamilatou Balde, Mignane Ndiaye, Khalidou Djibril Sow, Maryam Diarra, Abdoulaye Sam, Ababacar Mbaye, Boubacar Diallo, Yoro Sall, Ousmane Faye, Boly Diop, Abdourahmane Sow, Amadou Alpha Sall, Cheikh Loucoubar, Ndongo Dia, Oumar Faye, Diawo Diallo, Gamou Fall, Scott C. Weaver, Mamadou Aliou Barry, Mawlouth Diallo, and Moussa Moise Diagne
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Chikungunya ,Kedougou ,Southeastern Senegal ,outbreak ,genomic characterization ,Infectious and parasitic diseases ,RC109-216 ,Microbiology ,QR1-502 - Abstract
Chikungunya virus has caused millions of cases worldwide over the past 20 years, with recent outbreaks in Kedougou region in the southeastern Senegal, West Africa. Genomic characterization highlights that an ongoing epidemic in Kedougou in 2023 is not due to an introduction event but caused by the re-emergence of an endemic strain evolving linearly in a sylvatic context.
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- 2024
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131. Comprehensive analysis and identification of energy performance and unsteady two-phase flow patterns based on experiments and comparison between two distinct multiphase flow models
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Asad Ali, Jianping Yuan, Qiaorui Si, Shahzad Iqbal, Yuan Shouqi, Yolandani Yolandani, and Ibra Fall
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Euler-Euler two-fluid model ,volume of fluid model ,two-phase flow ,computational fluid dynamics ,electric submersible pump ,petroleum industries ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
In the petroleum sector, electrical submersible pumps (ESP) face numerous challenges when handling multiphase flow of gas and liquid. The primary challenge is from the build-up of the gas-bubbles within the impellers of ESPs, leading from moderate to severe deterioration in pump efficiency. Consequently, a comprehensive investigation is conducted, involving a combination of experimental and numerical analyses, to thoroughly explore the effects of gas entrainment on the performance and intricate internal flow mechanisms of a five-stage mixed-flow ESP. All these analysis was carried out under both design (Qd) and off-design conditions (0.8Qd, and 1.2Qd). For unsteady numerical calculations, two widely used multiphase-models: The volume of fluid (VOF) and The Euler-Euler model are employed and compared to investigate the versatility/validity of these models in predicting multiphase performance of ESP. The comparison between tests, Eulerian, and VOF models demonstrated that the Eulerian model aligns well with the experimental results. and shows higher-adaptability pattern with the test results. This reveals its best capability/versatility in predicting two-phase performance and internal-flow results for ESP. Moreover, it can more accurately capture the phase slippage inside ESP under two-phase flow. Additionally, this work provides a vision to the broad-applicability of Eulerian-model for complicated machinery such as ESP.
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- 2024
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132. Column experiments to study the thermo-hydro-mechanical-chemical behavior of sensitive marine slay subgrade soil treated with lime
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Tunono, Chanda and Fall, Mamadou
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- 2024
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133. First comprehensive untargeted metabolomics study of suramin-treated Trypanosoma brucei: an integrated data analysis workflow from multifactor data modelling to functional analysis
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Fall, Fanta, Mamede, Lucia, Vast, Madeline, De Tullio, Pascal, Hayette, Marie-Pierre, Michels, Paul A. M., Frédérich, Michel, Govaerts, Bernadette, and Quetin-Leclercq, Joëlle
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- 2024
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134. The prevalence and risk of symptom and function clusters in colorectal cancer survivors
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Potosky, Arnold L, Graves, Kristi D, Lin, Li, Pan, Wei, Fall-Dickson, Jane M, Ahn, Jaeil, Ferguson, Kristin M, Keegan, Theresa HM, Paddock, Lisa E, Wu, Xiao-Cheng, Cress, Rosemary, and Reeve, Bryce B
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Rehabilitation ,Depression ,Cancer ,Behavioral and Social Science ,Colo-Rectal Cancer ,Clinical Research ,Prevention ,Mental Health ,Digestive Diseases ,7.3 Management and decision making ,Management of diseases and conditions ,Good Health and Well Being ,Adult ,Female ,Humans ,Cancer Survivors ,Quality of Life ,Prevalence ,Survivors ,Colorectal Neoplasms ,Colorectal neoplasms ,Quality of life ,Cancer survivors ,Symptom assessment ,Population health ,Oncology and Carcinogenesis ,Public Health and Health Services ,Oncology & Carcinogenesis - Abstract
PurposeOur purpose was to describe the prevalence and predictors of symptom and function clusters in a diverse cohort of colorectal cancer survivors.MethodsWe used data from a cohort of 909 adult colorectal cancer survivors. Participants were surveyed at a median of 9 months after diagnosis to ascertain the co-occurrence of eight distinct symptom and functional domains. We used factor analysis to identify co-occurring domains and latent profile analysis (LPA) to identify subgroups of survivors with different symptom and function clusters. Multinomial logistic regression models were used to identify risk/protective factors.ResultsFactor analysis demonstrated a single underlying factor structure that included all eight health domains with depression and anxiety highly correlated (r = 0.87). The LPA identified three symptom and function clusters, with 30% of survivors in the low health-related quality of life (HRQOL) profile having the highest symptom burden and lowest functioning. In multivariable models, survivors more likely to be in the low HRQOL profile included being non-White, female, those with a history of cardiac or mental health conditions, and chemotherapy recipients. Survivors less likely to be in the low HRQOL profile included those with older age, greater financial well-being, and more spirituality.ConclusionNearly one-third of colorectal cancer survivors experienced a cluster of physical and psychosocial symptoms that co-occur with clinically relevant deficits in function.Implications for cancer survivorsImproving the identification of risk factors for having the highest symptom and lowest function profile can inform the development of clinical interventions to mitigate their adverse impact on cancer survivors' HRQOL.
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- 2022
135. Stability of marsh edge berms constructed from fine-grained dredged sediment
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David W. Perkey, Lenore P. Tedesco, Kelsey A. Fall, Thomas P. Huff, and Monica A. Chasten
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fine-grained sediment ,beneficial use ,marsh edge erosion ,sediment management ,dredging ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
Due to observed impacts of sea level rise, many sediment management strategies in coastal settings are seeking ways to beneficially use locally dredged sediment in restoration, nourishment, and construction projects. The placement of sediment in shallow, near-marsh areas is a promising application of dredged material to both increase accretion and provide protection to marshes and intertidal flats in back bay areas. However, dredged material in these areas often include fine-grained (
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- 2024
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136. Schlenk line protocols for using SmI2 and the impact of THF solvent
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Gyedi C. Appiah-Pipim, Aaron Yengbie, Peanut M. Edmonson, Beyza N. Yilmaz, Gisselle Y. Rojas, Caroline Tramontana, Korka M. Fall, and Kimberly A. Choquette
- Subjects
SmI2 synthesis ,Air-free reactions ,Method development ,Chemistry ,QD1-999 - Abstract
Samarium diiodide (SmI2) is a single electron reductant and versatile synthetic tool that can be used to create carbon- carbon bonds or other synthetic transformations. SmI2 is typically used with an Argon atmosphere glovebox and anhydrous solvents from a solvent purification system; however, not all labs have access to these equipment. A more accessible air-free option is Schlenk line glassware. Here in reports an optimized method for the synthesis and use of SmI2 on a Schlenk line. During optimization of the system, it was found that the largest impact on the success of SmI2 was the THF solvent. Anhydrous solvent was achieved though distillation, but after storage of the solvent over two weeks enough moisture/air was accumulated to significantly impact the concentration of the SmI2 formed in solution. The use of molecular sieves further indicates that the impact of water accumulation in the solvent compared to oxygen has the most significant factor on the success of synthesizing SmI2. These observations of THF storage overtime are important to account for when carrying out SmI2 reactions and other air-sensitive reactions on the Schlenk line.
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- 2024
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137. A mixed method feasibility and acceptability study of a flexible intervention based on acceptance and commitment therapy for patients with cancer
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François Bourgognon, Denise Bechet, Cécile Huin-Schohn, Aurélia Strelow, Laëtitia Demarche, Mireille Guillou, Virginie Adam, Estelle Fall, and Abdou Yacoubou Omorou
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cancer ,MAEva program ,mindfulness ,acceptance and commitment therapy ,quality of life ,stress ,Psychology ,BF1-990 - Abstract
ProposeThis study aimed to propose an innovative, open, and circular program that combines acceptance and commitment therapy (ACT) and mindfulness practices. We assessed its feasibility, acceptability, and first signs of its effect on psychological wellbeing in cancer support treatment.MethodsA single-center, single-arm, uncontrolled study was performed. Forty adult patients with non-metastatic prostate or breast cancer, newly diagnosed or undergoing treatment (chemotherapy, radiotherapy, hormone therapy), were recruited. Three cycles of three MAEva program sessions (MAEva: Mindfulness meditation, Acceptance, and Commitment to values program) over nine consecutive weeks were proposed. During the total of 12 weeks of follow-up, after attending the first session, patients were free to attend subsequent sessions.ResultsAdherence to the study was high, with participation in an average of 6.8 out of nine sessions. A total of eight patients attended all sessions over the three cycles, and 90% participated in at least one cycle. Furthermore, attendance was associated with a statistically significant improvement in Quality of Life (QoL). Each additional session was associated with a mean increase in overall QoL score of more than one point (β = 1.09 [0.13; 2.04], p = 0.02). The fatigue dimensions decreased with session attendance: physical (β = −2.24 [−3.63; −0.85]), emotional (β = −2.60 [−4.11; −1.09]), and interference with daily life (β = −2.33 [−3.95; −0.72]). The qualitative section demonstrated that patients learned skills and shared their ability to “let go”. Patients rated the degree of importance of the program at 8.36/10 (SD ± 1.64).ConclusionThis study highlights the feasibility and acceptability of an original program that combines ACT and mindfulness practices in cancer patients. Future studies are required to demonstrate the efficacy of the MAEVA program. The MAEva pilot study is registered with ClinicalTrials.gov under the identifier NCT04751201.Clinical trial registrationhttps://classic.clinicaltrials.gov/ct2/show/NCT04751201, identifier [NCT04751201].
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- 2024
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138. Maintenance proton pump inhibitor use and risk of colorectal cancer: a Swedish retrospective cohort study
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Lars Engstrand, Nele Brusselaers, Qing Liu, Katja Fall, Omid Sadr-Azodi, and Xinchen Wang
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Medicine - Abstract
Objectives We aimed to evaluate the risk of colorectal adenocarcinoma (CRA) associated with long-term use of proton pump inhibitors (PPIs) in a large nationwide cohort.Design Retrospective cohort study.Setting This research was conducted at the national level, encompassing the entire population of Sweden.Participants This study utilised Swedish national registries to identify all adults who had ≥180 days of cumulative PPI use between July 2005 and December 2012, excluding participants who were followed up for less than 1 year. A total of 754 118 maintenance PPI users were included, with a maximum follow-up of 7.5 years.Interventions Maintenance PPI use (cumulative≥180 days), with a comparator of maintenance histamine-2 receptor antagonist (H2RA) use.Primary and secondary outcome measures The primary outcome measure was the risk of CRA, presented as standardised incidence ratios (SIRs) with 95% confidence intervals (CIs). Subgroup analyses were performed to explore the impact of indications, tumour locations, tumour stages and the duration of follow-up. A multivariable Poisson regression model was fitted to estimate the incidence rate ratios (IRRs) and 95% CIs of PPI versus H2RA use.Results Maintenance PPI users exhibited a slightly elevated risk of CRA compared to the general population (SIR 1.10, 95% CI=1.06 to 1.13) for both men and women. Individuals aged 18–39 (SIR 2.79, 95% CI=1.62 to 4.47) and 40–49 (SIR 2.02, 95% CI=1.65 to 2.45) had significantly higher risks than the general population. Right-sided CRA showed a higher risk compared to the general population (SIR 1.26, 95% CI=1.20 to 1.32). There was no significant difference in the risk of CRA between maintenance PPI users and maintenance H2RA users (IRR 1.05, 95% CI=0.87 to 1.27, p
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- 2024
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139. Gossypiboma migration into the bladder
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Modou Ndiaye, Ibrahima Cissé, Papa Mamadou Faye, Oumar Gaye, Mouhamed Diallo, and Papa Ahmed Fall
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Textiloma ,Migration ,Bladder ,Prevention ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Gossypiboma is a dreaded complication following mainly abdomino-pelvic surgeries. The clinical presentation varies widely and is strongly associated with two factors: localization of the textiloma and type of the tissue reaction. Intravesical gossypiboma migration is rare and usually presents as recurrent urinary tract infections. We report a case of gossypiboma migration into the bladder that was treated by endoscopic extraction. The purpose of this report is to remind the importance of the prevention which must be the challenge rather than the treatment modalities.
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- 2024
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140. Guidance on mucositis assessment from the MASCC Mucositis Study Group and ISOO: an international Delphi studyResearch in context
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Ragda Abdalla-Aslan, Pierluigi Bonomo, Dorothy Keefe, Nicole Blijlevens, Katrina Cao, Yin Ting Cheung, Eduardo Rodrigues Fregnani, Robert Miller, Judith Raber-Durlacher, Joel Epstein, Ysabella Van Sebille, Elisa Kauark-Fontes, Abhishek Kandwal, Emma McCurdy-Franks, Joel Finkelstein, Victoria McCarvell, Yehuda Zadik, Giulia Ottaviani, Rui Amaral Mendes, Caroline Margina Speksnijder, Hannah Rose Wardill, Paolo Bossi, Alexa Laheij, Arghavan Tonkaboni, Jacqui Scott, Rania Abasaeed, Adel Kauzman, Adriana Do Socorro Lima Flato, Adwaita Gore, Anne-Marie Hardman, Agnes Horvath, Allan Hovan, Aisha Al-Jamaei, Aya koizumi, Alan Santos-Silva, Alessandra Majorana, Alexandre Giannini, Aléxia Teixeira, Muhammad Ali Shazib, Alison Melvin, Aluísio Miranda Filho, Amanda Gruza, Amber Brown-Dahl, Amit Harilall, Amr El Maghrabi, Ana Andabak Rogulj, Ana Raphaela Curvo, Ana Laura Soares, Andrea Stringer, Andréa Moreira, Andy Kurtzweil, Angelyn Salaberry, Anne Blazy, Anne Margrete Gussgard, Anne Marie Lynge Pedersen, Annette Freidank, Anura Ariyawardana, Adrian Ramseier, Jann Arends, Ariel Blanchard, Adriana Sesti Paz, Angela Thermann, Augusto Poropat, Azael Freites-Martinez, Abdul Rahman Al-Azri, Bente Brokstad Herlofson, Sitaraman BalajiSubramanian, Barbara Ballantyne, Kivanc Bektas-Kayhan, Bengt Hasséus, Benjamin Kaffenberger, Bernar Benites, Bernice Kwong, Beth Test, Fernando Chiantia, Bo Pettersson, Bomi Framroze, Božana Lončar Brzak, Brittany Dulmage, Sorin Buga, Caroline Spekssnijder, Carlton Brown, Antonio Carlos Moura de Melo, Ana Carolina Ribeiro, Caroline Silva, Caroline Fulop, Carryn Anderson, Catherine Flaitz, Cathy Massoud, Cesar Migliorati, Callie Gross, Chiara Gandini, Charles Loprinzi, Charlotte de Mooij, Catherine Hong, Ying Chu Choi, Maria Choy, Christine Boers-Doets, Leonard Schmeel, Cibele Nagano, Maria Coeli Franco, Courtney Subramaniam, Carolyn Patrick, Catherine Poh, Cristina Neuenschwander, Cesar Virgen, Dorothea Riesenbeck, Dale Weaver, Daniel Cohen Goldemberg, Daniel Sundaresan, Daniela Nunes, Danyel Perez, Daphine Travassos, David Yang, Daniela Ribeiro, Dean Kolbinson, Deborah Buick, Deborah Saunders, Juliane De Bortolli, Deepika Chugh, Denise Markstrom, Denise Travassos, Dianna Weikel, Dimitra Galiti, Dinusha Peiris, Fedja Djordjevic, Pankaj Singhai, Douglas Peterson, Douglas Fonseca, Doreen Pon, Iuliia Kovalenko, Aleksandra Polonskaia, Rogério Caldas, Kevin Saganski, Julia Néri, Dennis Abbott, Abhijna Vithal Yergolkar, Cristina Del Conte, Januaria Passos, Katia Uezu, Paula Silva, Steven Gilbert, Keng Yeoh, Kunal Jain, Madhup Rastogi, Satheeshkumar Poolakkad Sankaran, Deborah Manne, Evgeniya Shatokhina, Esther Adebayo-Olojo, Eszter Somogyi-Ganss, Eli Ehrenpreis, Wilber Bernaola-Paredes, Eduardo Fregnani, Elaci Cardoso, Elena Bardellini, Eleni Arvanitou, Elisa Kauark Fontes, Elise Bruning, Eloise Neumann, Elsa Madureira, Marcia Ramires, Erofili Papadopoulou, Etiene Munhoz, Fred Spijkervet, Fabiana Granzotto, Fabiana Martins, Fabio Alves, Farah Mougeot, Federica Aielli, Fernanda Pigatti, Fernanda Fonseca, Firoozeh Samim, Flavia Carvalho, Florence Cuadra Zelaya, Cesar Freytes, Gabriela da Silveira, Gabriela Torino, Gabriela Martins, Geisa Silva, Gemma Caro, Gemma Bryan, Georgette Radford, Ghanyah Al-Qadami, Giorgia Albini, Gisele Mainville, Georgios Gkardiakos, Gleidston Potter, Gulbin Hoeberechts, Gordon Howarth, Grace Bradley, Gunjan Verma, Gustavo dos Santos, Margaret Randles-Guzzardi, Hanlie Engelbrecht, Hannah Wardill, Heidi Hansen, Iquebal Hasan, Hironobu Hata, Helena Ullgren, Heliton Spindola Antunes, Heloísa Laís dos Santos, Howard Weld, Helen McInnes, Hans Peter Jungbluth, Hsiaofen Weng, Ian Hewson, Ingrid Santos, Jorge Illarramendi, Ines Semendric, Rol Menge, Inger Von Bultzingslowen, Maria da Gloria de Melo, Iona Leong, Isabella Fonseca, Isadora Kalif, James Carroll, Janet Coller, Johann Beck-Mannagetta, Joanne Bowen, Jose Meurer, Ricky McCullough, Jennifer Powers, Jesus Gomez, Jimma Lenjisa, jaya Vangara, Jasna Leko, Jane Fall-Dickson, Jean-Luc Mougeot, Joan Fox, Jolien Robijns, Jonn Wu, Patricio Palma, Jaya Amaram-Davila, Jim Siderov, Juliana Dantas, Juliana Jasper, Juliana Monteiro, Julia Bruno, julie pfeffer, Julija Jovanovic Ristivojevic, Juliana Brito, Jyothsna Kuriakose, Yuji Kabasawa, Kanan Dave, Karin Barczyszyn, Karol Sartori Lima, Kate Secombe, Kate White, Kate Cooper, Kouji Katsura, Karen Biggs, Katharine Ciarrocca, Kristopher Dennis, Ken Tomizuka, Kevin Hendler, Ikuko Komo, Kristina Skallsjö, Kristy Hodgins, Katia Rupel, Keiko Tanaka, Seema Kurup, Luiz Gueiros, Larissa Agatti, Laura Garzona-Navas, Letícia Guerra, Leila Portela, Leilani Iossi, Linda Elting, Lene Baad-Hansen, Leslie Reeder, Leticia Lang, Liciane Menezes, Liliana Braun, Liliane Grando, Mathew Lim, Lina Fernandez, Lucy McKeage, Luana Campos, Luciana Simonato, Luciana Muniz, Leah van Draanen, Mieko Mizutani, Tsai-Wei Huang, Mahfujul Riad, Mahnoor Nazar, Maíra Souza, Mariana Minamisako, Manoela Pereira, Carlos Mantelato, Márcio Diniz-Freitas, Marco Montezuma, Marco Andrade, Marcos Santos, Margherita Gobbo, Maria Caterina Fortuna, Mariana Vitor, Joana Marinho, Alina Markova, Marlyse Knuchel, Marta Carlesimo, Marta Neves, Andrew Mazar, Maria Cristina Gomez Amarilla, Mark Chambers, Melissa de Araujo, Alexandre Melo, Melody Cole, Mohamed Elsayed, Monica Fliedner, Martin Hauer-Jensen, Micaela Bouchacourt, Michael Brennan, Michael Thirlwell, Michio Nakamura, Midori Nakagaki, Camila Rossi, Mireille Kaprilian, Michael Kase, Michael Dougan, Monique Stokman, Ragnhild Monsen, Alisha Morgan, Jocelyn Harding, Maryam Taleghani, Marie-Therese Genot, Mukund Seshadri, Brian Muzyka, Nancy Batista, Nancy Gadd, Naoko Tanda, Narmin Nasr, Natália Garcia, Nathan Lee, Natalia Palmier, Norman Brito-Dellan, Nancy Corbitt, Neli Pieralisi, Verônica Serrano, Nicola Alessandro Iacovelli, Norma Lúcia Sampaio, Nour Karra, Niveditha Venkatesh, Noam Yarom, Renata Cristina Borin, Olivia Lemenchick, Ondina Mendes, Ourania Nicolatou-Galitis, Vasiliy Shchitka, Paula Reis, Paulo Sérgio Santos, Paz Fernandez-Ortega, Ira Parker, Raquel García, Peter Fritz, Edmund Peters, Pamela Gardner, Pierre Saint Girons, Priya Tiwari, Pravin Chaturvedi, Tais de Moraes, Priscila Andrade, Raj Nair, Rachel Gibson, Rachita Gururaj, Raghu Thota, Rajesh Lalla, Raquel Almeida Prado, Ravikiran Ongole, George Taybos, Regina Mackey, Renata Rego, Renata Camilotti, Renata Ferrari, Renato Junior, Rene-Jean Bensadoun, Richard Logan, Roberta Sales, Roberta Zanicotti, Roberta Tunes, Rodolfo Mauceri, Rosiene Feitoza, Kathryn Ruddy, Cynthia Rybczyk, Stephanie Trager, Sachiyo Mitsunaga, Sahani Gunathilake, Rajan Saini, Viola Salvestrini, Sandip Mukhopadhyay, Sandrina Angeloz, Pramod Sankar S, Luciana S Barbosa Barbosa, Elena Volkova, Sharon Elad, Sergio Cantoreggi, Sharon Gordon, Shelly Brown, Shu Yie Janine Tam, Sibelle Faleiro, Silmara da Silva, Silvia de Oliveira, Siri Beier Jensen, Ivana Skrinjar, Sophie Beaumont, Felipe Sperandio, Sandra Reese, Steven Roser, Sachiko Seo, Stephanie van Leeuwen, Stephen Sonis, Stephen Bernard, Stephen Rajan Samuel, Stuart Taylor, Suranjan Maitra, Susanne Skulski, Suzanne Carlisle, Sylvie Louise Avon, Tomoya Yokota, Takashi Yurikusa, Tabata Santos Polvora, Tabitha Kelock, Tauana Fernandes, Taylor Wain, Timothy Brown, Tetsuhito konishi, Thalyta Amanda Ferreira, Tomoko Kataoka, Thomas Kelly, Takehiko Mori, Tomoko Higuchi, Toshiaki Saeki, Nikolaos Tsoukalas, Typhaine Maupoint De Vandeul, Masatoshi Usubuchi, Vanessa Lacerda, Vanessa Tilly, Emmanuelle Vigarios, Alessandro Villa, Vinicius Torregrossa, Vinodh Kumar Selvaraj, Viviane Sarmento, Vivien Heng, Wagner Gomes-Silva, Petter Wilberg, Wanessa Miranda e Silva, Wan Nor I'zzah Wan Mohamad Zain, Wonse Park, Wim Tissing, Yoshihiko Soga, Bella Van Sebille, and Yuhei Matsuda
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Oral mucositis ,Gastrointestinal mucositis ,Mucositis assessment tools ,Patient-reported outcome measures ,Medicine (General) ,R5-920 - Abstract
Summary: Background: Mucositis is a common and highly impactful side effect of conventional and emerging cancer therapy and thus the subject of intense investigation. Although common practice, mucositis assessment is heterogeneously adopted and poorly guided, impacting evidence synthesis and translation. The Multinational Association of Supportive Care in Cancer (MASCC) Mucositis Study Group (MSG) therefore aimed to establish expert recommendations for how existing mucositis assessment tools should be used, in clinical care and trials contexts, to improve the consistency of mucositis assessment. Methods: This study was conducted over two stages (January 2022–July 2023). The first phase involved a survey to MASCC-MSG members (January 2022–May 2022), capturing current practices, challenges and preferences. These then informed the second phase, in which a set of initial recommendations were prepared and refined using the Delphi method (February 2023–May 2023). Consensus was defined as agreement on a parameter by >80% of respondents. Findings: Seventy-two MASCC-MSG members completed the first phase of the study (37 females, 34 males, mainly oral care specialists). High variability was noted in the use of mucositis assessment tools, with a high reliance on clinician assessment compared to patient reported outcome measures (PROMs, 47% vs 3%, 37% used a combination). The World Health Organization (WHO) and Common Terminology Criteria for Adverse Events (CTCAE) scales were most commonly used to assess mucositis across multiple settings. Initial recommendations were reviewed by experienced MSG members and following two rounds of Delphi survey consensus was achieved in 91 of 100 recommendations. For example, in patients receiving chemotherapy, the recommended tool for clinician assessment in clinical practice is WHO for oral mucositis (89.5% consensus), and WHO or CTCAE for gastrointestinal mucositis (85.7% consensus). The recommended PROM in clinical trials is OMD/WQ for oral mucositis (93.3% consensus), and PRO-CTCAE for gastrointestinal mucositis (83.3% consensus). Interpretation: These new recommendations provide much needed guidance on mucositis assessment and may be applied in both clinical practice and research to streamline comparison and synthesis of global data sets, thus accelerating translation of new knowledge into clinical practice. Funding: No funding was received.
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- 2024
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141. Effects of dietary EPA/DHA ratio on the growth performance, intestinal microbiota, immunity and resistance to heat stress in abalone Haliotis discus hannai Ino
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Bwebwe Botaa Tabuariki, Peng Chen, Keke Lei, Javad Sahandi, Fatou Ndoye Fall, Chukwuma Kenneth Chibuikem, Kangsen Mai, and Wenbing Zhang
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Eicosapentaenoic acid ,Docosahexaenoic acid ,Abalone ,Growth ,Immunity ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
The effects of different dietary EPA/DHA ratios (2.19, 1.59, 0.98, 0.55 and 0.38, respectively) on the growth performance, intestinal microbiota, immunity and resistance to heat stress in abalone Haliotis discus hannai Ino was evaluated after a 93-day feeding trial. Five isonitrogenous and isolipic (about 33% crude protein and 3% crude lipid) practical diets were formulated to fed abalones (initial body weight: 25.82 ± 0.51 g; initial mean shell length: 59.57 ± 0.40 mm). Results showed that 0.98–2.19 dietary EPA/DHA ratio significantly increased abalone’s weight gain rate (WGR) and daily increment in shell length (DISL). As for the intestine enzyme activity, trypsin activity was significantly higher when 0.55 EPA/DHA ratio was applied to the diet. The lipase activity in the groups with 0.98 and 0.55 dietary EPA/DHA ratio was significantly higher than those in other groups. And 1.59 dietary EPA/DHA ratio significantly increased α-amylase activity. In regard to the intestinal microbiota, the 0.98 dietary EPA/DHA ratio significantly increased the diversity indices and number of OTUs in the intestine, followed by the 2.19 dietary EPA/DHA ratio. At the phyla level, Firmicutes, Proteobacteria, Bacterioidota and Actinobacteria were dominant in all groups. The Mycoplasma was the most prevalent genus among all the groups. The highest abundance of Clostridium_sensu_stricto_11, Mycobacterium and Bacteroides belonged to the group with the 0.38 dietary EPA/DHA ratio. The abundance of Bacilli, Terasakiellacease and Ahrensia in 0.38 group were higher than that in the group with 0.98 and 2.19 dietary EPA/DHA ratio. Moreover, 1.59 dietary EPA/DHA ratio significantly reduced the falling rate of abalone after heat stress. And the hsp70 and hsp90 mRNA expression levels in the digestive gland were up-regulated significantly in the group with the 2.19 dietary EPA/DHA ratio. The 0.98 dietary EPA/DHA ratio could increase the content of malondialdehyde in cell-free hemolymph and the expressions of tnfa and nrf2 in digestive gland. In conclusion, the optimal dietary EPA/DHA ratio for abalone was estimated to be 1.63 using a second-order quadratic regression based on WGR. The 1.59–2.19 dietary EPA/DHA ratio could increase the immunity and resistance of abalone against heat stress.
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- 2024
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142. The influence of water vapor on the internal flow characteristics within a hydrogen circulation pump
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Qijiang Ma, Qiu Xia, Qi Wang, Cui Xiao, Shahzad Iqbal, Asad Ali, Guorui Gao, and Ibra Fall
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Physics ,QC1-999 - Abstract
This study examines the effects of water vapor on the performance and stability of a Roots-type hydrogen circulation pump. The accuracy of the numerical model was initially confirmed using air as the experimental medium, and subsequent simulations were conducted with pure hydrogen or mixed media containing water vapor. Analysis of pressure and velocity distribution within the pump revealed that water vapor does not significantly impact these factors. However, the interaction between hydrogen and water vapor results in the formation of larger hydrogen clusters, reducing internal leakage flow and leading to a slight increase in inlet and outlet flow rates. The presence of water vapor in the suction chamber increases turbulence energy in the root region of the rotor, influencing flow patterns and creating multi-scale vortex structures. In the exhaust chamber, the turbulence energy is lower and there are fewer vortices, but high-energy vortices may occur at the connection to the exhaust pipe, affecting the outlet flow rate.
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- 2024
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143. The emergency medical teams initiative in the WHO African region: a review of the development and progress over the past 7 years
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Thierno Balde, Boniface Oyugi, Jerry-Jonas Mbasha, Rashidatu Kamara, Lazaro Gilberto Martinez-Monterrey, Pryanka Relan, Camila Lajolo, Didier Bompangue, Ann Fortin, Joseph Okeibunor, Flavio Salio, Fiona Braka, Dick Chamla, Abdou Salam Gueye, N’Da Konan Michel Yao, and Ibrahima Socé Fall
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emergency medical teams ,WHO African region ,public health ,health emergencies ,COVID-19 ,Public aspects of medicine ,RA1-1270 - Abstract
BackgroundThe WHO Emergency Medical Teams (EMT) Initiative coordinates the deployment of qualified medical teams who promptly respond to public health emergencies (PHEs) and provide quality service during emergencies whilst strengthening capacity. Globally, 40 EMTs have been classified between 2016 and the present (as of the writing of this article in December 2023) and are from across all the WHO regions except the WHO Africa Region (AFRO). However, WHO Africa has prioritised the implementation of EMTs in 10 priority countries to address the public health emergencies (PHEs) affecting the region.ObjectiveThis article describes the development and progress of national EMTs in the WHO African Region over the past 7 years and elucidates the main lessons learned and the complexity and challenges in the process.MethodsThis study employed a case study approach because of its appropriateness in examining a complex social phenomenon in a socio-political context in depth, using multiple lenses simultaneously. Data and information were obtained through document reviews and key informant interviews (KIIs) (n = 5) with the members of the EMT Initiative on shared field experiences. Data were systematically analysed using the Stages of Implementation Completion (SIC) framework, and the lessons learnt were presented using components of a framework from Adini et al.ResultsThe Initiative commenced in the WHO African Region following its launch in December 2017 in Senegal. The assessments of the concept’s engagement (involved learning and deciding), feasibility (reviewing expectation and capacity), and readiness planning (collaborating and preparing) showed that the context-specific (African context) challenges, lessons from different emergency response actions mainly guided the Initiative’s pre-implementation phase in the region and prompted the WHO emergency leadership on the urgency and need for the EMT concept in the region. The assessment of the implementation processes showed progress in key areas, with staff demonstrating improved competency, EMT services maintaining high fidelity, effective consultation launching critical components, and ongoing services providing successful support and monitoring. Creating the N-EMTs and revitalising the EMT concept required an aligned strategy with other regional emergency programmes and a futuristic vision. Proposed sustainability and governance components include creating N-EMT, developing a coordination structure, collaborating with partners, and finalising the N-EMT.ConclusionThe Initiative is an imperative component that would allow better-targeted management of health emergencies in the region. The continuous refinement of the EMT initiative is crucial. There is a need to work on additional components, such as a context-specific framework for collaborations and partnerships that would enhance deployment and procurement modalities and the complementarity between other regional initiatives to improve the work. Emphasis should be placed on strengthening local health systems, enhancing training and capacity-building programmes, and fostering regional and international collaborations. Additionally, sustainable funding and resource allocation are essential to ensure the resilience of EMTs in the African region and their long-term success.
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- 2024
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144. Short time existence and smoothness of the nonlocal mean curvature flow of graphs
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Attiogbe, Anoumou, Fall, Mouahmed Moustapha, and Weth, Tobias
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Mathematics - Analysis of PDEs ,Mathematics - Differential Geometry - Abstract
We consider the geometric evolution problem of entire graphs moving by fractional mean curvature. For this, we study the associated nonlocal quasilinear evolution equation satisfied by the family of graph functions. We establish, using an analytic semigroup approach, short time existence, uniqueness and optimal H\"older regularity in time and space of classical solutions of the nonlocal equation, depending on the regularity of the initial graph. The method also yields $C^\infty-$smoothness estimates of the evolving graphs for positive times., Comment: 30 pages
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- 2022
145. On an electrostatic problem and a new class of exceptional subdomains of $\mathbb{R}^3$
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Fall, Mouhamed Moustapha, Minlend, Ignace Aristide, and Weth, Tobias
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Mathematics - Analysis of PDEs - Abstract
We study the existence of nontrivial unbounded surfaces $S\subset \mathbb{R}^3$ with the property that the constant charge distribution on $S$ is an electrostatic equilibrium, i.e. the resulting electrostatic force is normal to the surface at each point on $S$. Among bounded regular surfaces $S$, only the round sphere has this property by a result of Reichel $[23]$ (see also Mendez and Reichel $[16]$) confirming a conjecture of P. Gruber. In the present paper, we show the existence of nontrivial exceptional domains $\Omega \subset \mathbb{R}^3$ whose boundaries $S=\partial \Omega$ enjoy the above property., Comment: Minor corrections made. To Appear in SIAM Journal on Mathematical Analysis
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- 2022
146. Galactic angular momentum in the IllustrisTNG simulation -- I. Connection to morphology, halo spin, and black hole mass
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Rodriguez-Gomez, Vicente, Genel, Shy, Fall, S. Michael, Pillepich, Annalisa, Huertas-Company, Marc, Nelson, Dylan, Pérez-Montaño, Luis Enrique, Marinacci, Federico, Pakmor, Rüdiger, Springel, Volker, Vogelsberger, Mark, and Hernquist, Lars
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We use the TNG100 simulation of the IllustrisTNG project to investigate the stellar specific angular momenta ($j_{\ast}$) of $\sim$12,000 central galaxies at $z=0$ in a full cosmological context, with stellar masses ($M_{\ast}$) ranging from $10^{9}$ to $10^{12} \, {\rm M}_{\odot}$. We find that the $j_{\ast}$-$M_{\ast}$ relations for early-type and late-type galaxies in IllustrisTNG are in good overall agreement with observations, and that these galaxy types typically `retain' $\sim$10-20 and $\sim$50-60 per cent of their host haloes' specific angular momenta, respectively, with some dependence on the methodology used to measure galaxy morphology. We present results for kinematic as well as visual-like morphological measurements of the simulated galaxies. Next, we explore the scatter in the $j_{\ast}$-$M_{\ast}$ relation with respect to the spin of the dark matter halo and the mass of the supermassive black hole (BH) at the galactic centre. We find that galaxies residing in faster spinning haloes, as well as those hosting less massive BHs, tend to have a higher specific angular momentum. We also find that, at fixed galaxy or halo mass, halo spin and BH mass are anticorrelated with each other, probably as a consequence of more efficient gas flow toward the galactic centre in slowly rotating systems. Finally, we show that halo spin plays an important role in determining galaxy sizes - larger discs form at the centres of faster-rotating haloes - although the trend breaks down for massive galaxies with $M_{\ast} \gtrsim 10^{11} \, {\rm M}_{\odot}$, roughly the mass scale at which a galaxy's stellar mass becomes dominated by accreted stars., Comment: 17 pages, 11 figures. Published in MNRAS
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- 2022
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147. Narrative Instruction in Elementary Classrooms: An Observation Study
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Hall, Colby, Capin, Philip, Vaughn, Sharon, Gillam, Sandra L., Wada, Rebekah, Fall, Anna-Maria, Roberts, Greg, Dille, Jordan T., and Gillam, Ronald B.
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This study examined the amount and types of narrative instruction (i.e., story comprehension, oral storytelling, and story writing instruction) that general education English language arts teachers provide to students in Grades 1 through 4. The research team conducted 121, [approximately]30-minute classroom observations. Educators were asked to teach a lesson focused on narrative comprehension or production (i.e., on "understanding literary text or creating stories"). The amount and type of story instruction provided to students varied across classrooms. Forty-four percent of observed minutes were devoted to story comprehension; 10% of minutes addressed story writing. Teachers spent no time working with students on oral storytelling. Findings suggest that story production may not be an instructional focus in many primary-grade classrooms. In addition, from both a macrostructure and a microstructure standpoint, typical narrative instruction may omit elements of narrative language instruction that are associated with improved narrative comprehension, oral storytelling, and writing outcomes. [This paper was published in "Elementary School Journal" v121 n3 2021 (EJ1296722).]
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- 2021
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148. Alternative Paths to Improved Word-Problem Performance: An Advantage for Embedding Pre-Algebraic Reasoning Instruction within Word-Problem Intervention
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Powell, Sarah R., Berry, Katherine A., Fall, Anna-Maria, Roberts, Greg, Fuchs, Lynn S., and Barnes, Marcia A.
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The purpose of this study was to explore the paths by which word-problem intervention, with versus without embedded pre-algebraic reasoning instruction, improves word-problem performance. Students with mathematics difficulty (MD; n = 304) were randomly assigned to a business-as-usual condition or one of two variants of word-problem intervention. The pre-algebraic reasoning component targeted relational understanding of the equal sign as well as standard and nonstandard equation solving. Intervention occurred for 16 weeks, 3 times per week, 30 min per session. Sequential mediation models revealed main effects, in which each intervention condition significantly and substantially outperformed the business-as-usual condition, corroborating prior research on the efficacy of schema word-problem intervention. Yet despite comparable effects on word-problem outcomes between the two word-problem conditions, the process by which effects accrued differed: An indirect path via equal-sign understanding and then equation solving was significant only for the word-problem intervention condition with embedded pre-algebraic reasoning instruction. Additionally, the effect of this condition on equal-sign reasoning was strong. Given the link between equal-sign reasoning for success with algebra and the importance of algebra for success with advanced mathematics, results suggest an advantage for embedding pre-algebraic reasoning instruction within word-problem intervention. [This paper was published in "Journal of Educational Psychology" v113 n5 p898-910 2021.]
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- 2021
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149. Training the next generation of learning health system scientists
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Lozano, Paula M, Lane‐Fall, Meghan, Franklin, Patricia D, Rothman, Russell L, Gonzales, Ralph, Ong, Michael K, Gould, Michael K, Beebe, Timothy J, Roumie, Christianne L, Guise, Jeanne‐Marie, Enders, Felicity T, Forrest, Christopher B, Mendonca, Eneida A, Starrels, Joanna L, Sarkar, Urmimala, Savitz, Lucy A, Moon, JeanHee, Linzer, Mark, Ralston, James D, and Chesley, Francis D
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Health Services and Systems ,Health Sciences ,Clinical Research ,Health Services ,Generic health relevance ,Good Health and Well Being ,embedded research ,health system partnership ,learning health systems workforce ,patient-centered outcomes research ,training ,patient‐centered outcomes research - Abstract
IntroductionThe learning health system (LHS) aligns science, informatics, incentives, stakeholders, and culture for continuous improvement and innovation. The Agency for Healthcare Research and Quality and the Patient-Centered Outcomes Research Institute designed a K12 initiative to grow the number of LHS scientists. We describe approaches developed by 11 funded centers of excellence (COEs) to promote partnerships between scholars and health system leaders and to provide mentored research training.MethodsSince 2018, the COEs have enlisted faculty, secured institutional resources, partnered with health systems, developed and implemented curricula, recruited scholars, and provided mentored training. Program directors for each COE provided descriptive data on program context, scholar characteristics, stakeholder engagement, scholar experiences with health system partnerships, roles following program completion, and key training challenges.ResultsTo date, the 11 COEs have partnered with health systems to train 110 scholars. Nine (82%) programs partner with a Veterans Affairs health system and 9 (82%) partner with safety net providers. Clinically trained scholars (n = 87; 79%) include 70 physicians and 17 scholars in other clinical disciplines. Non-clinicians (n = 29; 26%) represent diverse fields, dominated by population health sciences. Stakeholder engagement helps scholars understand health system and patient/family needs and priorities, enabling opportunities to conduct embedded research, improve outcomes, and grow skills in translating research methods and findings into practice. Challenges include supporting scholars through roadblocks that threaten to derail projects during their limited program time, ranging from delays in access to data to COVID-19-related impediments and shifts in organizational priorities.ConclusionsFour years into this novel training program, there is evidence of scholars' accomplishments, both in traditional academic terms and in terms of moving along career trajectories that hold the potential to lead and accelerate transformational health system change. Future LHS training efforts should focus on sustainability, including organizational support for scholar activities.
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- 2022
150. Estrogen-modulating treatment among mid-life women and COVID-19 morbidity and mortality: a multiregister nationwide matched cohort study in Sweden
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Evangelia Elenis, Helena Kopp Kallner, Maria A. Karalexi, David Hägg, Marie Linder, Katja Fall, Fotios C. Papadopoulos, and Alkistis Skalkidou
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Menopause hormonal treatments ,Estrogens ,Menopause ,COVID-19 ,SARS-CoV-2 ,Medicine - Abstract
Abstract Background It has been repeatedly shown that men infected by SARS-CoV-2 face a twofold higher likelihood of dying, being hospitalized or admitted to the intensive care unit compared to women, despite taking into account relevant confounders. It has been hypothesized that these discrepancies are related to sex steroid hormone differences with estrogens being negatively correlated with disease severity. The objective of this study was therefore to evaluate COVID-19-related mortality and morbidity among peri- and postmenopausal women in relation to estrogen-containing menopause hormonal treatments (MHT). Methods This is a national register-based matched cohort study performed in Sweden between January 1 to December 31, 2020. Study participants comprised women over the age of 53 years residing in Sweden. Exposure was defined as prescriptions of local estrogens, systemic estrogens with and without progestogens, progestogens alone, or tibolone. MHT users were then compared with a matched cohort of non-users. The primary outcome consisted of COVID-19 mortality, whereas the secondary outcomes included inpatient hospitalizations/outpatient visits and confirmed SARS-CoV-2 infection. Multivariable adjusted Cox regression-derived hazard ratios (HRs) were calculated. Results Use of systemic estrogens alone is associated with increased COVID-19 mortality among older women (aHR 4.73, 1.22 to 18.32), but the association is no longer significant when discontinuation of estrogen use is accounted for. An increased risk for COVID-19 infection is further observed for women using combined systemic estrogens and progestogens (aHR 1.06, 1.00 to 1.13) or tibolone (aHR 1.21, 1.01 to 1.45). Use of local estrogens is associated with an increased risk for COVID-19-related death (aHR 2.02,1.45 to 2.81) as well as for all secondary outcomes. Conclusions Systemic or local use of estrogens does not decrease COVID-19 morbidity and mortality to premenopausal background levels. Excess risk for COVID-19 morbidity and mortality was noted among older women and those discontinuing systemic estrogens. Higher risk for death was also noted among women using local estrogens, for which non-causal mechanisms such as confounding by comorbidity or frailty seem to be the most plausible underlying explanations. Trial registration details Not applicable.
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- 2024
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