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Interplay of S and As in Mekong Delta sediments during redox oscillations

Geoscience Frontiers 2019年第5期10卷 1715-1729页

作者： Van T.H. Phan Fabrizio Bardelli Pierre Le Pape raoul-marie couture Alejandro Fernandez-Martinez Delphine Tisserand Rizlan Bernier-Latmani Laurent Charlet University Grenoble Alpes CNRSIRDIFSTTARISTerre38000GrenobleFrance Ho Chi Minh City University of Technology (HCMUT) Vietnam National UniversityHo Chi Minh City (VNU-HCM)268 Ly Thuong KietDistrict 10Ho Chi Minh CityViet Nam Institute of Nanotechnology (CNR-Nanotec) 00186RomeItaly Institut de Mineralogie de Physique des Materiaux et de Cosmochimie (IMPMC)UMR 7590 CNRS-UPMC-IRD-MNHN4 Place Jussieu75252Paris cedex 05France Département de chimie Université Laval1045 Avenue de la MédecineQuébecQCG1V 0A6Canada Ecole Polytechnique Fédérale de Lausanne (EPFL) e Environmental Microbiology Laboratory (EML) EPFL-ENAC-IIE-EMLStation 6CH-1015LausanneSwitzerland

The cumulative effects of periodic redox cycling on the mobility of As,Fe,and S from alluvial sediment to groundwater were investigated in bioreactor *** particular sediments from the alluvial floodplain of the Mekong Delta River were investigated: Matrix A (14 m deep) had a higher pyrite concentration than matrix B (7 m deep) *** present in matrix B but absent in matrix *** the reactors,the sediment suspensions were supplemented with As(III) and SO4^2-,and were subjected to three full-redox cycles entailing phases of nitrogen/CO2,compressed air sparging,and cellobiose *** differences in As concentration and speciation were observed upon redox *** support the fact that initial sediment composition is the main factor controlling arsenic release and its speciation during the redox ***,a high pyrite content associated with a low SO4^2- content resulted in an increase in dissolved As concentrations,mainly in the form of As(III),after anoxic half-cycles;whereas a decrease in As concentrations mainly in the form of As(V),was instead observed after oxic *** addition,oxic conditions were found to be responsible for pyrite and arsenian pyrite oxidation,increasing the As pool available for *** same processes seem to occur in sediment with the presence of gypsum,but,in this case,dissolved As were sequestered by biotic or abiotic redox reactions occurring in the FeeS system,and by specific physico-chemical condition (***).The contrasting results obtained for two sediments sampled from the same core show that many complexes and entangled factors are at work,and further refinement is needed to explain the spatial and temporal variability of As release to groundwater of the Mekong River Delta (Vietnam).

关键词： Redox oscillation Pyrite oxidation Gypsum dissolution Isotope sulfur Isotope oxygen

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Epidemiological, Clinical Progress Aspects of Congenital Heart Disease with Neonatal Revelation at the Mother-Child Hospital of Bingerville (HME) Concerning 98 Cases from January 2021 to December 2022 (Côte d’Ivoire)

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Open Journal of Pediatrics 2024年第1期14卷 89-100页

作者： Adja Evelyne Akaffou-Gbery Richard Azagoh-Kouadio Anne-Lise Laetitia Mobio Jean-Jacques Yao Atteby Serenah marie Janice N’vrah Anoh Kouassi raoul Yao Department of Paediatrics and Neonatology H&#244pital Mère-Enfant de Bingerville (HME) Bingerville C&#244te d’Ivoire Department of Medical Pediatrics and Specialties CHU de Angré Abidjan C&#244te d’Ivoire

Introduction The distribution of congenital heart disease (CHD) in sub-Saharan Africa is highly imprecise and varies from one region to another due to the inequality of diagnostic facilities. The aim of this study was to determine the in-hospital prevalence of congenital heart disease in children at the Mother-Child hospital of Bingerville (HME) by specifying the diagnostic, therapeutic and evolutionary aspects. Materials and methods We conducted a retrospective, descriptive, cross-sectional study at HME of Bingerville from January 2021 to December 2022. All newborns with congenital heart disease confirmed by echocardiography were included in the study. Results Of 656 admissions to the neonatology department over the study period, congenital heart disease accounted for 14.9% (98/656) of cases. In our series, 76.7% were diagnosed before the 1st week of life, with a mean chronological age of 5.18 days and extremes of 0 and 46 days. There were as many male patients (50%) as female (50%), i.e. a sex ratio of 1. These newborns were premature in 60.2% of cases, with a mean and median gestational age of 34 weeks’ amenorrhea. Most were left-right shunts (90.8%). Persistent ductus arteriosus (PDA) (48.9%) predominated, followed by atrial septal defect (38.7%), ventricular septal defect (13.3%), common trunk artery (CTA) (3.1%) and open septal pulmonary atresia (OSPA) (1%) as the primary cyanogenic heart disease. Pulmonary arterial hypertension (PAH) (50%) was primary in 38.8% and secondary (61.2%). The mortality rate was 30.6%, and all CTA patients died (100%), with a significant statistical relationship (p = 0.027). Progression under treatment was marked by clinical stabilization (68/98) in 69.4% of cases. Conclusion: Congenital heart disease is relatively common at the Bingerville HME. Access to echocardiography should be facilitated in neonatology departments for rapid diagnosis and optimal management of congenital heart disease in newborns.

关键词： Newborn Congenital Heart Disease Côte d’Ivoire

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Prevalence of Dyslipidemia among Patients Received at the Biochemistry Unit of the Charles de Gaulle Pediatric University Hospital in Ouagadougou

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Advances in Biological Chemistry 2024年第1期14卷 16-26页

作者： Fabienne marie Soudre Arnaud Kouraogo Alice Kiba Ollo Da Mahutin Benoîte Hounhoui Diema Nadia Karama Seraphine Mano Denis Claude Drabo Augustin Kyetega raoul Karfo Elie Kabre Jean Sakande Health Sciences Training and Research Unit Joseph Ki-Zerbo University Ouagadougou Burkina Faso Charles de Gaulle Pediatric University Hospital Ouagadougou Burkina Faso Health Sciences Institute Nazi BONI University Bobo Dioulasso Burkina Faso Biochemistry Unit Sourou Sanou University Hospital Bobo Dioulasso Burkina Faso Tengandogo University Hospital Ouagadougou Burkina Faso Faculty of Health Sciences Saint Thomas d’Aquin University Ouagadougou Burkina Faso Yalgado Ouedraogo University Hospital Ouagadougou Burkina Faso National Agency for Environmental Food Labor and Health Product Safety Ouagadougou Burkina Faso

Introduction: Cardiovascular disease represents a major public health burden worldwide. Research and management of risk factors contribute to the prevention of these diseases. The aim of this study was to assess the prevalence of dyslipidemia in the biochemistry unit of the Charles De Gaulle Pediatric University Hospital (CHUP-CDG) in Ouagadougou. Material and Methods: This was a descriptive and analytical cross-sectional study, with retrospective data collection from January 1, 2020 to December 31, 2022. Patients of all ages who performed a lipid panel in the CHUP-CDG biochemistry unit during the study period have been included. Results: A total of 2872 patients have been included. The mean age of the study population was 27.72 ± 19.51 years and the M/F sex ratio was 0.81. Among the patients, 22.84% had at least one dyslipidemia. The prevalences of hypercholesterolemia, hypo-HDL cholesterolemia and hyper-LDL cholesterolemia were 11.57%, 49.19% and 57.50% respectively. Hypertriglyceridemia and mixed hyperlipidemia were present in 9.04% and 2.08% of patients. Hypercholesterolemia was significantly more frequent in the female sex (p = 0.0077);hyper-LDL cholesterolemia (p = 0.0255) and mixed hyperlipidemia (p Conclusion: The relatively high prevalence of dyslipidemia in the study indicates a worrying situation. It would therefore appear essential to extend the search for risk factors nationwide, particularly those that can be modified, in order to reduce morbidity and mortality linked to cardiovascular disease.

关键词： Dyslipidemia Lipid Profile Lipid Abnormalities Prevalence Burkina Faso

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Epidemiological and Histopathological Aspects of Chronic Gastritis at the Departmental University Teaching Hospital of Borgou Alibori (CHUD-BA) from 2011 to 2021

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Open Journal of Pathology 2023年第1期13卷 54-71页

作者： Luc Valère Codjo Brun Khadidjatou Sake Alassan marie-Claire Assomption Oloufoudi Balle Pognon Nukunté David Lionel Togbenon marie-Noëlle Oréofè Axelle Zomahoun raoul Gomez Moncho Adrien Hodonou Oumou Boukari Pacôme Ahouanse Wilfried Akpo Falilath Seidou marie Thérèse Akele Akpo Faculty of Medicine University of Parakou Parakou Benin Faculty of Health Sciences University of Abomey Calavi Cotonou Benin

Background: Gastritis is better evaluated nowadays since the advent of upper gastrointestinal endoscopy. Despite the availability of this workup in Benin Republic, there is a scarcity of data on chronic gastritis. Objective: This work aimed to study the epidemiological and histopathological aspects of chronic gastritis in the Departmental University Teaching Hospital of Borgou Alibori (CHUD-B/A) from 2011 to 2021. Method: This was a retrospective cross-sectional study with descriptive and analytical purposes, carried out from February 23, 2022 to May 23, 2022, among patients who had undergone gastric biopsy and/or gastrectomy from January 2011 to January 2022 (10 year), and whose specimens were sent into the histopathology section of the CHUD-B/A. Non-probability sampling was performed with exhaustive recruitment. A survey form has been used to collect data from patients’ medical records. Pearson’s chi-square and Fisher’s exact tests have been used as appropriate to determine correlations between variables. Result: A total of 310 cases of chronic gastritis were diagnosed in the histopathology section of the CHUD-B/A from 2011 to 2021. This represented a chronic gastritis frequency of 91.45% for all gastric lesions diagnosed throughout the study period. Erythematous gastropathy was the most frequent (70.35%). Helicobacter pylori was present in 36.77% and dysplasia was observed in 12.26% of cases. Erythematous gastropathy was a predictive factor for the absence of gastric dysplasia in histopathology check up (p-value = 0.042). In contrast, intestinal metaplasia was predictive of the presence of gastric dysplasia in histopathology check up (p-value < 0.001). Conclusion: Chronic gastritis is very common in our setting. Systematic biopsy performance in front of an evocative clinical situation followed by histopathological examination may be encouraged.

关键词： Epidemiology Histopathology Chronic Gastritis Dysplasia Parakou (Benin)

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Biometric Analysis on Genetic Divergence between Parental and Regenerated Accessions in Tall Coconut Palms (Cocos nucifera L.) from International Genebank for Africa and the Indian Ocean

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Open Journal of Genetics 2022年第2期12卷 11-23页

作者： Saraka Didier Martial Yao Wentoin Alimata marie Pierre Daramcoum Eric-Blanchard Zadjéhi Koffi Konan Jean Louis Konan Nafan Diarrassouba Bourdeix Roland raoul Sylvère Sie Irié Arsène Zoro Bi Department of Biochemistry and Genetics Pedagogical and Research Unit (UPR) of Genetics Shea Breeding Program University of Peleforo Gon Coulibaly (UPGC) Korhogo C&#244 te d’Ivoire Centre National de Recherche Agronomique (CNRA) Marc Delorme Research Station of Port-Bou&#235 t Abidjan C&#244 te d’Ivoire CEFE-CNRS Montpellier France Department of Natural Science Nangui Abrogoua University Abidjan C&#244 te d’Ivoire

This study endeavour assesses agromorphological likeness between initial introductions and regenerated accessions at the International Coconut Genebank for Africa and the Indian Ocean (ICG-AIO) based in C?te d’Ivoire. Ten couples of parental (G0) and regenerated (G1) accessions of Tall coconut palms were analyzed using Principal Component Analysis (PCA) and Multiple Analysis of Variance (MANOVA) from 26 agromorphological characters. The main results showed a relative decrease in the expression of the phenotypical traits concerning the component of the fruit, height and vigor of the stem and yield of bunches and fruits after one regeneration cycle. But, a high proportion (69%) of studied characters from leaf, inflorescence and nut components showed likeness between G0 and G1 accessions. After one regeneration cycle, the controlled pollination method guarantees significant conservation of the expression of the majority of agromorphological traits. Consequently, regenerated accessions of Tall coconut palms can be used to pursue research and development programs in C?te d’Ivoire.

关键词： Agromorphological Likeness Controlled Pollination Côte d’Ivoire Regenerated Accessions Tall Coconut

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Knowledge, Attitudes and Practice Regarding Breast Cancer among Parakou University Female Students in 2021

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Open Journal of Pathology 2023年第1期13卷 28-39页

作者： Luc Valère Codjo Brun Luc Béhanzin Nukunté David Lionel Togbenon marie-Claire Assomption Oloufoudi Balle Pognon Yessito Corine Nadège Houéhanou-Sonou Sèdjro raoul Atadé Christelle Doussengue Falilath Séidou Kabibou Salifou marie Thérèse Akélé Akpo Faculty of Medicine University of Parakou Parakou Benin National School of Public Health and Epidemiology University of Parakou Parakou Benin Institute of Nursing and Obstetrical Care (IFSIO) University of Parakou Parakou Benin Faculty of Health Sciences University of Abomey Calavi Cotonou Benin

Background: Breast cancer is a life-threatening pathology affecting women across the world. Evidence suggests deficiency of knowledge and numerous sociodemographic factors contribute to delayed medical attention seeking behavior whether initial symptoms of breast cancer go undetected. Objective: This study aimed to assess knowledge, attitudes and practices regarding breast cancer among Parakou University female students in 2021. Method: This was a cross-sectional study with descriptive and analytical purposes, carried out on the campus of the University of Parakou, from June 14 to July 2, 2021. Data collection was performed through an individual online questionnaire, designed with KoBoCollect version 1.29.3. Data analysis was implemented with EPI INFO VERSION 7.***.3.3 software. Result: A total of 200 students meeting the inclusion criteria participated in this study. Among them, 20.5% had never heard about breast cancer. Non practice of breast cancer screening (breast self-examination) prevalence was 80%. Factors favoring non practice of breast cancer screening were: ethnicity, religion, not adhering to screening ideas, not committing to educating family and friends about screening. Factors promoting breast cancer screening practice were: having ever heard about breast cancer, being able to point to breast cancer symptoms, having adequate knowledge of breast cancer screening methods, having a good knowledge of the late-stage screening drawbacks. Conclusion: Some young women with high school level are still unaware of breast cancer and do not practice screening. Policymakers should consider more effective information outreach.

关键词： Knowledge Attitudes Practice Breast Cancer Parakou (Benin)

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Dynamic Spectrum Access Protocol for the Digital Dividend

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Circuits and Systems 2016年第13期7卷 4124-4144页

作者： raoul Zamblé Raymond Gbégbé Jean-marie Kadjo Olivier Asseu Pacôme Brou Ecole Supérieure Africaine des Technologies de l’Information et de la Communication (ESATIC) Abidjan Cote d’Ivoire Institut National Polytechnique Houphouet Boigny (INPHB) Yamoussoukro Cote d’Ivoire

It is not more and more, easy to satisfy the important and growing spectrum demands in the context of the static conventional policy spectrum allocation. Therefore, to find a suitable solution to this problem, we are to days observing the apparition of flexible dynamic spectrum allocation methods. These methods that ought to improve more significantly the spectrum use have gained much interest. In fact, the digital dividend due to the change-over from the analog television to the digital terrestrial television must be efficiently used. So the Dynamic Spectrum Access (DSA) can potentially play a key role in shaping the future digital dividend use. In the DSA, two kinds of users or networks coexist on different channels. The first one, known as the primary user, accesses to a channel with high priority;and the second one, known as secondary user has a low priority. This paper presents a dynamic spectrum access protocol based on an auction framework. Our protocol is an interesting tool that allows the networks to bid and obtain on the available spectrum, the rights to be primary and secondary users according their valuations and traffic needs. Based on certain offers, our protocol selects primary and secondary users for each idle channel in order to realize the maximum economic for the regulator or social benefits. We deal with the case in which the offers of the networks are independent one another even if they will share the same channels. We design an algorithm in accordance with our dynamic spectrum access protocol. The algorithm is used here to find an optimal solution to the access allocation problem, specifically to digital dividend. Finally, the results in the numeric section, regarding the three suggested scenarios, show that the proposed dynamic spectrum access protocol is viable. The algorithm is able to eliminate all non-compliant bidders for the available spectrum sharing. We notice that the revenue or social benefits of the regulator is maximized when we

关键词： Dynamic Spectrum Access Protocol Centralized Spectrum Sharing Spectrum Auctions Digital Dividend

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Zeros in Accelerometer Files A Comparison Study of Ten Published Nonwear Algorithms

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Journal of Sports Science 2014年第1期2卷 53-61页

作者： Stephanie Crevier-couture Tracie Ann Barnett Jennifer O'Loughlin Angelo Tremblay marie-Eve Mathieu Department of Kinesiology University of Montreal Montreal H3C 3J7 Canada Department of Exercise Science Concordia University Montreal H4B 1R6 Canada CHU Sainte-Justine Research Center Montreal H3T 1C5 Canada Department of Social and Preventive medicine University of MontreaL Montreal H3C 3J7 Canada Department of Kinesiology Laval University Quebec city G I V OA6 Canada

Despite the increasing use of accelerometers, the handling of zero values in data files remains understudied. Using data from the QUALITY (QUebec Adipose and Lifestyle Investigation in Youth) cohort, output from 10 published nonwear algorithms were compared in 520 children aged 8-10 years who wore an Actigraph accelerometer for 7 days. These algorithms differed by: 1) the minimal duration of consecutive zeros required to be designated as nonwear (10-90 minutes); 2) the presence and magnitude of an allowance period, and 3) the presence of a specific time frame. Significant differences were obtained between all but two algorithms, including: 1) wear time differences up to 117 minutes per day; 2) differences in counts per minutes as high as 80; and 3) differences in sedentary time up to two hours daily. Estimates of light and moderate-to-vigorous physical activity were less affected. This study suggests that the nonwear algorithm used can have a significant effect on estimates of wear duration, overall physical activity level and sedentary time in children. Until technological developments bring to zero nonwear time, specifying the nonwear algorithm used when publishing results is essential to ensure accurate comparison between studies.

关键词：运动科学体育运动体育训练运动训练

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Epidemiology, Diagnosis and Survival of Breast Cancer: Data from the Population-Based Cancer Registry of the City of Parakou from 2017 to 2021

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Open Journal of Pathology 2023年第1期13卷 9-27页

作者： Luc Valère Codjo Brun Rachidi Sidi Imorou Nukunté David Lionel Togbenon marie-Claire Assomption Oloufoudi Balle Pognon Mawuton Alphonse Renaud Aholou Sèdjro raoul Atade Oumou Boukari Freddy Houéhanou Rodrigue Gnangnon Salmane Amidou Falilath Séidou Hierrhum Aboubacar Bambara Kabibou Salifou marie Thérèse Akélé Akpo Faculty of Medicine University of Parakou Parakou Benin Saint Jean de Dieu Hospital of Tanguiéta Tanguiéta Benin Institute of Nursing and Obstetrical Care (IFSIO) University of Parakou Parakou Benin Faculty of Health Sciences University of Abomey Calavi Cotonou Benin National Program for the Control of Non-Communicable Diseases Ministry of Health Cotonou Benin Oncology and Clinical Hematology Department of the CHU Bogodogo Joseph Ki-Zerbo University Ouagadougou Burkina Faso

Background: Breast cancer mortality remains high in the majority of developing countries. The Ministry of Health has established two population-based cancer registries in Benin: the first one in Cotonou in 2014 and the second one in Parakou in 2017. However, there is a scarcity of data on breast cancer survival and prognosis in Benin Republic. Objective: This study sought to investigate epidemiological, diagnostic, and survival aspects of breast cancer in Parakou, based on data from its population-based cancer registry from 2017 to 2021. Method: For descriptive and analytical purposes, we used a retrospective cohort design. From January 24, 2022 to August 31, 2022, data were collected in all health facilities covered by the Parakou population-based cancer registry using an individual questionnaire. Survival and prognosis analysis were performed using KAPLAN MEIER method and David COX proportional hazard model respectively. Result: A total of 81 patients have been included in this study. The incidence rate of breast cancer in Parakou was 17.5 per 100,000 person-years with a mortality rate of 2.76 per 100,000 person-years. The median age at diagnosis was 44.50 years with extremes ranging from 19 to 76 years and a predominance of 40 - 50 years age group. The median survival time was estimated at 30 months with an overall 5-year survival of 47%. Young age at diagnosis (p-value = 0.002) and advanced stage at diagnosis (p-value = 0.000) had a negative impact on survival in women. The combination of surgery and chemotherapy improved survival (p-value = 0.018). Conclusion: Breast cancer is still a public health issue in Parakou. It comes out mandatory that resources be made available to make screening, early diagnosis and appropriate treatment of breast cancer affordable.

关键词： Breast Cancer Survival Cancer Registry Parakou (Benin Republic)

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用于敞开式变电站的特高压开关设备

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华东电力 2007年第C期35卷 104-113页

作者： Francois Biquez Denis Chatrefou Jean-marie Delcoustal Ferruccio Dianin Christian Lindner raoul Piccoli AREVA T&D France

作为1100kV的UHV（特高压）输电，面临技术——生态环境的巨大挑战。变电站的UHV开关装置模块，需要的是可靠、成本／效益比好、环境友好、可维护的方案。对于这些所需的参数以及技术规范的验证，采用AIS（空气隔离变电所）技术能完全... 详细信息

作为1100kV的UHV（特高压）输电，面临技术——生态环境的巨大挑战。变电站的UHV开关装置模块，需要的是可靠、成本／效益比好、环境友好、可维护的方案。对于这些所需的参数以及技术规范的验证，采用AIS（空气隔离变电所）技术能完全满足这些需要。介绍由瓷柱式断路器、隔离开关和NCIT（非传统互感器）所组成的UHV模块。这些装置是根据模块原理预先设计好的，其中的设备间的连接肯定允许快速安装。在变电站设备控制和检测方面，模块是预制标准化。加拿大和德国的试验站对断路器、隔离开关等独立的开关元件，在1100kV上做BIL、SIL和工频等绝缘试验，性能表现非常优越。因为对于特高压电压等级，IEC标准至今尚未规定，所以将根据外推法和现场数据作合理解释。瓷柱式断路器采用了最新复合绝缘体技术，在安全方面有所改进。AIS方案其他的关键技术，例如环境保护和成本，在可比的功能间，根据市场估计价值，与GIS解决方法作了比较。

关键词：特高压敞开式变电站开关设备

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