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Identification of the Diffusion Coefficients of Pollutants ( n O 3 - and Mn2+) through the Walls of Concrete Tank and Vulnerability of the Stored Water Quality

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Engineering（科研） 2024年第9期16卷 246-274页

作者： narcisse Malanda Bienvenu Ebata ndion Christian Tathy Thibault Mongo Paul Louzolokimbembe nation School Superior Polytechnic Marien Ngouabi University Brazzaville Republic of Congo Superior Institute Architecture Town Planning Building and Public Works University of Dnis Sassou Nguesso Kintl Republic of Congo

The populations of urban centers in Congo-Brazzaville have decided to develop various methods of water storage (concrete or masonry underground tanks) for domestic use, due to shortages in the distribution of water through the public network. However, questions remain as to the physico-chemical quality of the water stored in these tanks, when these structures are built in wet and relatively polluted areas. This paper presents a model of pollutant diffusion through the cementitious matrix (concrete) of tank walls simulated at a buried reservoir. The results of the experimental and numerical simulations show that certain concrete parameters, such as porosity, permeability and diffusivity, have a significant influence on the transfer of pollutants through the concrete walls, thus altering the physico-chemical quality of the stored water. The numerical models (1D) used to predict pollutant transfer and the quality of the stored water are consistent with those of the optimal control for identifying the diffusion coefficient. Major ion concentrations appear to be correlated with system porosity and diffusion coefficient. nevertheless, the identification of the diffusion coefficient from the optimal control method, based on an explicit numerical resolution of a finite volume PDE for the approximation of the experiment, is not consistent with that of the optimal control method.

关键词： Buried Tank Water Concrete Modelling Optimal Control Diffusion Coefficient

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Comparative Analysis of Statistical Thickness Models for the Determination of the External Specific Surface and the Surface of the Micropores of Materials: The Case of a Clay Concrete Stabilized Using Sugar Cane Molasses

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Geomaterials 2024年第2期14卷 13-28页

作者： nice Mfoutou ngouallat narcisse Malanda Christ Ariel Ceti Malanda Kris Berjovie Maniongui Erman Eloge nzaba Madila Paul Louzolo-Kimbembe Mechanics Energy and Engineering Laboratory Higher National Polytechnic School Marien Ngouabi University Brazzaville Republic of the Congo national Institute for Research in Engineering Sciences Innovation and Technology (INRSIIT) Brazzaville Republic of the Congo Higher Institute of Architecture Building Planning and Public Works Denis SASSOU N&#8217GUESSO University Kint&#233l&#233 Republic of the Congo Hydrogen Research Institute University of Quebec in Trois Rivieres Quebec Canada Superior normal School (EnS) Marien Ngouabi University Brazzaville Republic of the Congo

In this work, four empirical models of statistical thickness, namely the models of Harkins and Jura, Hasley, Carbon Black and Jaroniec, were compared in order to determine the textural properties (external surface and surface of micropores) of a clay concrete without molasses and clay concretes stabilized with 8%, 12% and 16% molasses. The results obtained show that Hasley’s model can be used to obtain the external surfaces. However, it does not allow the surface of the micropores to be obtained, and is not suitable for the case of simple clay concrete (without molasses) and for clay concretes stabilized with molasses. The Carbon Black, Jaroniec and Harkins and Jura models can be used for clay concrete and stabilized clay concrete. However, the Carbon Black model is the most relevant for clay concrete and the Harkins and Jura model is for molasses-stabilized clay concrete. These last two models augur well for future research.

关键词： Statistical Thickness Model External Specific Surface Microporous Surface Clay Concrete Molasses

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Retro Placental Hematoma: Maternal and Fetal Prognosis at the Maternity of the University Hospital of Bouake

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Open Journal of Obstetrics and Gynecology 2024年第1期14卷 44-56页

作者： Samake Yaya Djanhan Lydie Estelle Menin-Messou Benie Michele Kouadio Kouadio narcisse Akanji Iburaima Alamun M’bro Clausen Georgie Boko Dagoun Dagbesse Elysee Camara Sokhona n’guessan Kouadio Ismael Foua Bi Paul Hyacinthe Keita Ismael Vaho Magnificat Marina Kone Minzata Yasmine Doumbia Yacouba Gynaecology-Obstetrics Department Centre Hospitalier Universitaire de Bouaké Bouake Ivory Coast Mother and Child Department Alassane Ouattara University Bouake Ivory Coast

Introduction: Retroplacental haematoma (RPH) is a very serious complication of pregnancy, with life-threatening consequences for both the mother and foetus. The aim of this study is to determine the incidence and epidemiological characteristics of patients with retroplacental haematoma (RPH) and describe the maternal-foetal complications at Bouaké University Hospital. Methods: This was a cross-sectional prospective, descriptive and analytical study carried out at Bouaké University Hospital over a period of 3 years, from January 1, 2019 to December 31, 2021. All parturients with RPH whose delivery took place at the hospital were included in the study. Data were entered and analysed using EPI InFO software version 7.***.2.6. Results: We recorded 2,0959 deliveries, including 202 cases of RPH, representing an incidence of 0.96%. The 21 to 35 age group accounted for 64.4%, multigestas and large multigestas accounted for 58.5% and multiparas accounted for 41.6%. The main signs on clinical examination were metrorrhagia (100%), arterial hypertension (84.6%) and cervical cerclage (79.7%). Preeclampsia accounted for 50% of per-gestational pathologies. Maternal mortality was 12.9%. Morbidity was dominated by anaemia in 64.1%, followed by disseminated intravascular coagulation (DIC) in 21.8%, and the factors associated with this maternal prognosis were multiple gestations, multiparity, Sher grade IIIb and the occurrence of complications such as DIC, shock, renal complications and HELLP syndrome. neonatal mortality was 79.2%, and the factors associated with these fetal prognoses were cup size ≥ 5 cm and hematoma weight ≥ 500 g. Conclusion: Better screening of at-risk populations, early diagnosis and treatment in an organised and equipped medical and surgical facility would improve prognosis.

关键词： Retroplacental Haematoma Lethality Bouaké and Prognosis

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An update on Gardneralla vaginalis associated bacterial vaginosis in Malaysia

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Asian Pacific Journal of Tropical Biomedicine 2017年第9期7卷 831-835页

作者： nada Khairi Younus Renu Gopinath Ravindran Jegasothy Syafinaz Amin nordin Alex van Belkum narcisse Mary Vasantha Kumari neela Department of Medical Microbiology and Parasitology Faculty of Medicine and Health SciencesUniversiti Putra Malaysia43400 SerdangSelangor Darul EhsanMalaysia Obstetrics and Gynaecology MAHSA University CollegeMalaysia bioMerieux R&D MicrobiologyLa Balme les GrottesFrance

Objective: To update the status of Gardnerella vaginalis(G. vaginalis) as a causative agent of bacterial vaginosis(BV) in Malaysia and to define its epidemiology, metronidazole resistance and virulence ***: It is a single-centre(Gynaecology clinic at the Hospital Kuala Lumpur,Malaysia) prospective study with laboratory-based microbiological follow up and analyses. Vaginal swabs collected from the patients suspected for BV were subjected to clinical BV diagnosis, isolation and identification of G. vaginalis, metronidazole susceptibility testing, vaginolysin and sialidase gene PCR, Piot's biotyping and amplified ribosomal DnA restriction analysis ***: Among the 207 patients suspected for BV, G. vaginalis was isolated from 47 subjects. G. vaginalis coexisted with Trichomonas vaginalis and Candida albicans in 26 samples. Three G. vaginalis isolates were resistant to metronidazole. Biotyping revealed 1 and 7 as the common types. Amplified ribosomal DnA restriction analysis genotype II was found to be more common(n = 22; 46%) than I(n = 12; 25.53%) and III(n = 13;27.6%). All genotype I and III isolates carried the sialidase gene, while 91.6% and 84.6%contained the vaginolysin gene. Genotype I was significantly associated with postgynaecological surgical complications and abortions(P = 0.002).Conclusions: The existence of pathogenic G. vaginalis clones in Malaysia including drug resistant strains should not be taken lightly and needs to be monitored as these may bring more complications especially among women of child bearing age and pregnant women.

关键词： Gardnerella vaginalis Piot’s biotype ARDRA Vaginolysin Sialidase

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Riverbank Erosional Features in the Stanley Pool of the Congo River and Some Geotechnical Classifications of the Sands

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Journal of Geoscience and Environment Protection 2019年第5期7卷 152-167页

作者： Guy Dieudonne Moukandi n’Kaya narcisse Malanda Olivier Florent Essouli Bernard Mabiala Alain Laraque Mechanical Energy and Engineering Laboratory/UNESCO Chair in Engineering Sciences/Ecole Nationale Supérieure Polytechnique Marien Ngouabi University Brazzaville Congo Geosciences Laboratory Faculty of Sciences and Technology Marien Ngouabi University Brazzaville Congo Geosciences Environment Toulouse-UMR 5563 of CnRS UMR 234 of Institute of Research for Development/Paul Sabatier University Montpellier France

The Stanley Pool, an almost circular island about thirty kilometers in diameter, crossed by the Congo River, is subject to diversified erosion of its riverbanks. This study highlights description using geotechnical particle size distribution analysis of soils of the shoreline that make up the shoreline. Three critical areas of the island were examined to characterize the origins of these erosion phenomena. The results obtained show that the soil materials are mostly sands with very fine or fine grains characteristic of very unstable soils. The morpho-sedimentological characteristics of the areas studied show that these soils are plastic (with a Plasticity Index between 15 percent and 19 percent). The presence of water, action of currents or groundwater flow easily destabilize the materials that make up the riverbank and cause the fines to creep (Collapse of sandy riverbanks, Landslide of sandy riverbanks, …).

关键词： Erosion Riverbanks Congo River Stanley Pool Geotechnical Analysis Particle Size Distribution

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毛里塔尼亚海域沙丁鱼耳石微量元素特征分析

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海洋渔业 2022年第4期44卷 385-395页

作者：宋利明周旺王迪 Ebango ngando narcisse 上海海洋大学海洋科学学院上海201306 上海海洋大学国家远洋渔业工程技术研究中心上海201306

鱼类耳石元素含量受栖息环境影响,因此通过分析鱼类耳石元素含量比值可以研究其栖息环境。根据2018年10月至12月在毛里塔尼亚海域(20°10′n~21°10′n、17°10′W~17°40′W)采集的219尾沙丁鱼(Sardina pilchardus),筛选58枚沙丁鱼耳石... 详细信息

鱼类耳石元素含量受栖息环境影响,因此通过分析鱼类耳石元素含量比值可以研究其栖息环境。根据2018年10月至12月在毛里塔尼亚海域(20°10′n~21°10′n、17°10′W~17°40′W)采集的219尾沙丁鱼(Sardina pilchardus),筛选58枚沙丁鱼耳石,利用激光剥蚀电感等离子质谱仪(laser ablation inductively coupled plasma mass spectrometry,LA-ICP-MS)测定不同年龄耳石元素含量并分析其比值的差异,探讨毛里塔尼亚海域沙丁鱼不同年龄栖息环境的变化情况。结果显示,毛里塔尼亚海域沙丁鱼耳石共检测到44种元素,主要为钙(Ca)、钠(na)、锶(Sr)、铁(Fe)、镁(Mg)、钡(Ba)等;所有样本中不同性别沙丁鱼耳石主要微量元素(na、Sr、Fe、Mg、Ba)含量与Ca含量比值差异不显著(P>0.05);毛里塔尼亚海域沙丁鱼耳石微量元素na、Sr、Mg、Ba含量与Ca含量的比值核心区跟1龄区相比差异不显著(P>0.05),1龄区与2龄区、2龄区与边缘区差异显著(P<0.05)。研究表明,毛里塔尼亚海域不同性别的沙丁鱼栖息环境相同;毛里塔尼亚海域沙丁鱼0龄与1龄栖息环境差异不显著,1龄与2龄及2龄与被捕获时栖息环境差异显著。

关键词：沙丁鱼耳石微量元素毛里塔尼亚海域

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Copper-Catalyzed C-C(O)C Bond Cleavage of Monoalkylated β-Diketone: Synthesis of α,β-Unsaturated Ketones

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International Journal of Organic Chemistry 2023年第2期13卷 41-49页

作者： Tony Wheellyam Pouambeka Victor n’goka narcisse nicaise Obaya Guy Crépin Enoua Hubert Makomo Qian Zhan Laboratory of Plant and Life Chemistry Unit: Equipe de Chimie Organique et Analytique des Substances Bioactives Faculty of Science and Technology Marien Ngouabi University Brazzaville The Republic of Congo Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Faculty of Chemistry Northeast Normal University Changchun China

A new and simple route for the synthesis of α,β-unsaturated ketones via cleavage of the C-C(O)C single bond of monoalkylated β-diketone has been described. The reaction was catalyzed by copper, a cheap transition metal in a weakly basic medium (K3PO4) at room temperature. To carry out this study, we first had to synthesize the monoalkylated β-diketones 1. Afterwards, α,β-unsaturated ketones 2 were obtained with high yields around 80%. Finally, all the products were characterized by 1H nMR, 13C nMR, and HRMS spectra. .

关键词： Monoalkylated β-diketone α β-Unsaturated Ketones Copper-Catalyzed C-C(O)C Bond Cleavage

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毛里塔尼亚海域日本鲭时空分布与海洋环境的关系

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上海海洋大学学报 2020年第6期29卷 868-877页

作者：宋利明许回陈明锐 EBAnGO nGAnDO narcisse 上海海洋大学海洋科学学院上海201306 国家远洋渔业工程技术研究中心上海201306 大洋渔业资源可持续开发教育部重点实验室上海201306 远洋渔业协同创新中心上海201306

根据2017年9月20日至12月31日在毛里塔尼亚海域112个站点的调查数据,研究日本鲭(Scomber japonicus)的时空分布规律,并采用分位数回归的方法对随机选取的78%的站点数据建立其单位捕捞努力量渔获量(catch per unit effort,CPUE)与叶绿素... 详细信息

根据2017年9月20日至12月31日在毛里塔尼亚海域112个站点的调查数据,研究日本鲭(Scomber japonicus)的时空分布规律,并采用分位数回归的方法对随机选取的78%的站点数据建立其单位捕捞努力量渔获量(catch per unit effort,CPUE)与叶绿素a浓度、海表面温度、海表面盐度的关系模型,并利用剩余22%的站点数据验证所建立的模型的有效性,利用广义加性模型(GAM)评价环境因子的影响程度。根据分位数模型,计算日本鲭的栖息地综合指数(integrated habitat index,IHI),对建模站点和验证站点的CPUE实测值与预测值进行Wilcoxon(符号秩)检验,用Spearman相关系数结合双尾检验,检验其CPUE实测值与预测值之间的相关性,分析IHI与CPUE的关系。结果表明:海表面温度对日本鲭CPUE的影响最显著,其次是温盐的交互作用和海表面盐度,叶绿素a浓度对其无显著影响;建模站点和验证站点的CPUE预测值与实测值间皆无显著性差异;IHI模型对CPUE具有良好的预测效果;IHI分布较高的海域为17°25′W~17°45′W和20°15′n~20°45′n。根据上述结果,建议我国渔船在下半年作业时,作业范围应集中在17°25′W~17°45′W和20°15′n~20°45′n区域,以提高渔获产量。

关键词：日本鲭时空分布海洋环境分位数回归栖息地综合指数毛里塔尼亚水域

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毛里塔尼亚海域短线竹[夹]鱼时空分布与海洋环境的关系

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海洋渔业 2020年第5期42卷 533-541页

作者：宋利明徐双泉许回陈明锐 Ebango ngando narcisse 上海海洋大学海洋科学学院上海201306 国家远洋渔业工程技术研究中心上海201306 大洋渔业资源可持续开发省部共建教育部重点实验室上海201306 远洋渔业协同创新中心上海201306

利用中国灯光围网船"福远渔097"2017年9月20日至12月31日在毛里塔尼亚海域119个站点的调查数据,采用分位数回归的方法对随机选取的75%的站点数据建立短线竹[夹]鱼(Trachurus trecae)单位捕捞努力量渔获量(catch per unit effort,CPUE... 详细信息

利用中国灯光围网船"福远渔097"2017年9月20日至12月31日在毛里塔尼亚海域119个站点的调查数据,采用分位数回归的方法对随机选取的75%的站点数据建立短线竹[夹]鱼(Trachurus trecae)单位捕捞努力量渔获量(catch per unit effort,CPUE)与叶绿素a浓度、海表面温度、海表面盐度的关系模型。根据该模型,计算短线竹[夹]鱼的栖息地综合指数(integrated habitat index,IHI),并利用25%的站点数据,用Spearman相关系数结合双尾检验,检验其CPUE实测值与预测值之间的相关性,分析IHI与CPUE的关系。结果表明:1)海洋环境因子对短线竹[夹]鱼CPUE的影响程度为:海表面温度>叶绿素a浓度>海表面温度与叶绿素a浓度的交互作用,海表面盐度对其没有显著影响;2)建模站点和验证站点的CPUE预测值与实测值间均无显著性差异;3)IHI模型对CPUE具有良好的预测效果;4)IHI分布较高的海域为17°20′~17°45′W、20°15′~20°50′n。建议我国渔船在下半年作业时,作业范围应集中在这一IHI分布较高的海域,以提高渔获产量。

关键词：短线竹[夹]鱼时空分布栖息地综合指数海洋环境分位数回归毛里塔尼亚水域

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Outcomes of External-Beam Radiation Therapy Boost with Conventional Fractionation in Cervical Cancer: A Retrospective Analysis about 133 Cases

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Journal of Cancer Therapy 2020年第9期11卷 547-560页

作者： Evrard narcisse Séka bertrand Ghislain Compaoré Bassané Alain Wilfried Mossé Siham Jaba Kouadio Davy n’chiépo Maroua Benlemlih Hasnae Bouhia Mohammed Adnane Tazi Sanae El Majjaoui noureddine Benjaafar Department of Radiotherapy National Institute of Oncology Rabat Morocco Department of Radiotherapy Mohammed V Military Hospital Rabat Morocco national School of Public Health Rabat Morocco Mohammed V University in Rabat Rabat Morocco

Introduction: External-beam radiation therapy boost is a treatment option in cervical cancer when brachytherapy is not feasible. Though less effective than brachytherapy, some encouraging results have been reported fr... 详细信息

ng>Introduction:ng> External-beam radiation therapy boost is a treatment option in cervical cancer when brachytherapy is not feasible. Though less effective than brachytherapy, some encouraging results have been reported from some institutions experiences. We conducted this study to assess outcomes of EBRT boost for our patients at National Institute of Oncology in Rabat. Patients and Methods: We collected data from patients treated for cervical cancer between January 2012 and December 2015. Patients, tumor and treatment characteristics were collected. Overall survival (OS), disease-free survival (DFS) and prognostic factors influencing DFS were assessed. Results: One hundred and thirty-three patients were enrolled. Median age was 52 years. Patient haemoglobin level ranged from 3.9 to 15.5n> g/dl [mean: 11.2 g/dl]. Most tumors were classified stage III/IVA (63.2%) according to the FIGO classification. Regional lymph node metastases (pelvic and or para-aortic) were observed in 45.1%. Median total dose to tumor was 69.6 Gy (ranging from 66 to 70 Gy). Overall treatment time was protracted, with a median of 60 days. Most of patients received concurrent chemotherapy (94.7%) and the number of cycle ranged from 2 to 7 (median = n style="font-family:Verdana;">5). The follow-up median was 31.3 months, ranging from 6.2 to 96.8 months. At the first visit, most patients achieved complete response (80.5%). Five years OS and DFS were 47% and 44% respectively. In univariate and multivariate analysis, regional lymph nodes metasta

关键词： Cervical Cancer External Beam Radiation Therapy Boost Survival Prognostic Factors

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