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Characterization of Aquifers in Crystalline and Crystallophyll Basement Zones Using the Electrical Resistivity Method (Trails and Electrical Soundings) in the Gagnoa Region, (Central-Western Côte d’Ivoire)

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International Journal of Geosciences 2024年第6期15卷 511-523页

作者： Oscar Zahibo Onétié assoué kouakou sylvestre kouadio Kotchi Rodrigue Orou Maxime Assa Abe Department of Geosciences Peleforo Gon Coulibaly University Korhogo Cte dIvoire Department of Agriculture and New Technologies University of San Pedro San Pedro Cte dIvoire

Introduction: Located in the central-western part of Côte d’Ivoire, the subsoil of the Gagnoa region is made up of sedimentary volcano formations and granitoids with developed fracturing. This complex Precambrian basement contains most of the region’s water resources. This is at the origin of the high failure rate during the various hydrogeological prospecting campaigns. Methodology: The database consists of resistivities from 42 holes and 51 trails drilled as part of the implementation of high-throughput drilling in the study area. The objective of this study is to deepen the knowledge of the fissured basement by interpreting profile curves and electrical soundings. It will be a question of classifying the different types of anomalies obtained on the profiles and their shapes. The orientation of the lineaments observed on the profiles was determined. Results: The interpretation of the geophysical data revealed various anomalies, the main ones being of the CC (Conductor Compartment) and CEDP (Contact between two bearings) types. These types of anomalies are mainly expressed in various forms: the “V”, “W” and “U” shapes. From these anomalies and the appearance of the electrical profiles, lineaments and their orientations were identified with N90-100, N130-140, N170-180 as major orientations. Conclusion: These results could contribute to a better understanding of the fractured environment of the Gagnoa region.

关键词： Basement Electrical Profiles Sounding Curves Resistivities

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Use of a Multiple Regression Model in the Estimation of Water Borehole Flows in the Middle of Cracked Basement in Côte d’Ivoire

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Journal of Water Resource and Protection 2020年第7期12卷 527-544页

作者： assoué kouakou sylvestre kouadio Ouedraogo Moussa Ismaïla Ouattara Issiaka Savane Laboratoire Géosciences et Environnement (LGE) UFR des Sciences et Gestion de l’Environnement (SGE) University of Nangui Abrogoua (UNA) Abidjan C&ocirc te d’Ivoire Laboratoire Géosciences et Environnement (LGE) UFR Sciences Géologique et Minière (SGM) University of Man (UM) Man C&ocirc te d’Ivoire

The objective of this study was to propose a mathematical regression model to estimate the exploitation flow rate of a water borehole from geophysical parameters in the midst of a fissured basement in the central-eastern part of C?te d’Ivoire. The data of the study are both hydrogeological and geophysical parameters from one hundred and eleven (111) data sheets of (111) water and geophysical boreholes. Two methods were used. The Normal Principal Component Analysis (NPCA) method applied to the data made it possible to select the explanatory variables (geophysical parameters) for borehole productivity. The multiple linear regression method subsequently made it possible to propose a mathematical model capable of estimating the exploitation rate from the geophysical parameters. The results indicate a very strong correlation (0.87) between longitudinal conductivity and flow rate, with flow rate and apparent resistivity negatively correlated. The multiple linear regression method highlighted two relevant explanatory variables, longitudinal conductivity and apparent resistivity. These two geophysical parameters contributed to a mathematical model in the form Q = C1X1 + C2X2 + ... + CnXn + C0. the real model obtained in this work is Q = 0.82Cl - 0.12*** + 2.5. The resulting model is efficient with a correlation of 86% in calibration and 95% in validation. A bias of 0.37 in calibration and 0.82 in validation is observed. Finally, the square root mean square error (RMSE) is 3.10 to 3.38 respectively in calibration and validation.

关键词： Productivity Drilling Apparent Resistivity Longitudinal Conductivity Linear Regression Fissured Aquifers

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Insight into the Origin of Iron Ore Based on Elemental Contents of Magnetite and Whole-Rock Geochemistry:A Case of the Bipindi Banded Iron Formations,Nyong Complex,SW Cameroon

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Journal of Earth Science 2024年第1期35卷 16-28页

作者： Landry Soh Tamehe Huan Li sylvestre Ganno Zuxing Chen Yanick Brice Lemdjou Safiyanu Muhammad Elatikpo School of Geosciences and Info-Physics Central South UniversityChangsha 410083China Department of Earth Sciences University of Yaounde IYaounde 3412Cameroon Institute of Oceanology Chinese Academy of SciencesQingdao 266071China Department of Geology Ahmadu Bello University ZariaZaria 810107Nigeria

The Bipindi iron ore district is located in the central section of the Nyong Complex at the northwestern margin of the Congo Craton in Southwest *** iron district contains numerous iron mineralization hosted by the Mewongo,Bibole,Kouambo,and Zambi banded iron formations(BIFs).These BIFs contain magnetite as the main iron ore mineral associated with pyrite,and gangue minerals are quartz with minor chlorite and *** origin of iron ore from these BIFs was investigated using a combination of in-situ magnetite and whole-rock *** studied BIF ore samples have a narrow range of TFe between 30.90 wt.%and 43.20 wt.%,indicating a low-grade *** geochemical signatures of magnetite such as low contents of base metals(e.g.,Cu,Co,V,and Zn)and low Co/Zn ratios600 and>75,respectively),we suggest that magnetite was derived from a mixture of seawater and~0.1%low-temperature hydrothermal fluids in an oxidizing ***,low-temperature hydrothermal and later metamorphic fluids were necessary for the transformation of the protolith Nyong Complex BIFs to iron ore.

关键词： banded iron formations iron ore geochemistry Congo Craton trace element composition LA-ICP-MS

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Efficient scar-free knock-ins of several kilobases in plants by engineered CRISPR-Cas endonucleases

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Molecular Plant 2024年第5期17卷 824-837页

作者： Tom Schreiber Anja Prange Petra Schafer Thomas Iwen Ramona Grutzner sylvestre Marillonnet Aurelie Lepage Marie Javelle Wyatt Paul Alain Tissier Department of Cell and Metabolic Biology Leibniz Institute of Plant BiochemistryWeinberg 306120 Halle(Saale)Germany Limagrain Centre de RechercheRoute d’EnnezatCS 9012663720 ChappesFrance

In plants and mammals,non-homologous end-joining is the dominant pathway to repair DNA doublestrand breaks,making it challenging to generate knock-in *** this study,we identified two groups of exonucleases from the herpes virus and the bacteriophage T7 families that conferred an up to 38-fold increase in homology-directed repair frequencies when fused to Cas9/Cas12a in a tobacco mosaic virus-based transient assay in Nicotiana *** achieved precise and scar-free insertion of several kilobases of DNA both in transient and stable transformation *** Arabidopsis thaliana,fusion of Cas9 to a herpes virus family exonuclease led to 10-fold higher frequencies of knock-ins in the first generation of *** addition,we demonstrated stable and heritable knock-ins in wheat in 1%of the primary *** together,our results open perspectives for the routine production of heritable knock-in and gene replacement events in plants.

关键词： homology-directed repair knockin gene replacement CRISPR-Cas 50 exonuclease plants

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Multitarget Thiol-Activated Tetrapyridyl Gold(Ⅲ)Complexes for Hypoxic Cancer Therapy

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CCS Chemistry 2024年第3期6卷 783-797页

作者： Xue-Quan Zhou Selda Abyar Imma Carbo-Bague Lan Wang Sebastian Türck Maxime ASiegler Uttara Basu Ingo Ott Rongfang Liu Adriaan PIJzerman sylvestre Bonnet Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate School(SIGS)Tsinghua UniversityShenzhen 518055 Leiden Institute of Chemistry Leiden University2333 CC Leiden Department of Chemistry Simon Fraser UniversityBurnabyBritish Columbia V5A 1S6 Institute of Medicinal and Pharmaceutical Chemistry Technische Universität Braunschweig38106 Braunschweig Department of Chemistry Johns Hopkins UniversityBaltimoreMaryland 21218 Division of Drug Discovery&Safety Leiden Academic Centre for Drug ResearchLeiden University2333 CC Leiden

Gold complexes have emerged as promising anticancer metallodrugs due to their efficient thioredoxin reductase(TrxR)inhibition,which disturbs the redox balance of cancer ***,in this model,the role of the ligand(s)coordinated to gold is often *** this work,we present a series of tetrapyridyl Au(Ⅲ)complexes that exhibit thiol-induced release of a Au(Ⅰ)ion and a tetrapyridyl *** formation of a free Au(Ⅰ)center is responsible for the expected TrxR ***,the released ligand,which was visible in cells due to its intense blue fluorescence,showed excellent binding properties to the hERG potassium ***,these ligands ended up in the lysosomes,resulting in significant lysosome ***,the Au(Ⅲ)complexes presented in this work showed broad-spectrum anticancer properties,both in hypoxic 2D monolayers and 3D tumor *** suggest that the interaction of the released Au(Ⅰ)center and the tetrapyridyl ligand with two different protein targets may combine into prodrugs that overcome hypoxia-induced drug deactivation.

关键词： anticancer Au(Ⅲ)complexes enzyme inhibtion potassium channel affinity lysosome damage cell imaging prodrug

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Nutritional and Sensory Properties of Penne-Type Pasta Based on Cereals (Oryza sativa (L.), Digitaria exilis, Pennicetum glaucum), Tubers (Ipomoea batata, Manihot esculenta Crantz), and a Legume (Vigna unguiculata (L.))

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Food and Nutrition Sciences 2024年第5期15卷 351-360页

作者： Maurice Jean François sylvestre Lopy Ndèye Fatou Ndiaye Malick Mbengue Mamadou Salif Sow Abdou Diouf Department of Cereals and Legumes Institute of Food Technology (ITA) Dakar Senegal Polytechnic School Cheikh Anta Diop University Dakar Senegal

This study aimed to evaluate the nutritional and sensory characteristics of penne-type pasta produced from locally sourced cereals, tubers, and legumes. To achieve this, we formulated four different types of pasta with varying levels of incorporation ranging from 10 to 50% cereals such as millet, fonio, and rice, tubers such as manioc and sweet potato, and legumes such as cowpea. The results showed that the incorporation of local products considerably improved the nutrient content of penne without being rejected by consumers. Sensory analysis showed that the best results were obtained with mixtures of sweet potato, cowpea, and wheat, as well as with rice, manioc, cowpea, and sample wheat. These results are of great importance to manufacturers in a world where developing nutritious and attractive food products is a crucial challenge.

关键词： Pasta Tubers Cereals Legumes

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Amniotic Band Syndrome at the Van Norman Clinic in Burundi: A Case Series

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Surgical Science 2024年第3期15卷 118-124页

作者： Alice Ndayishimiye Hélène Bukuru Déogratias Niyungeko Anne Marie Nikuze sylvestre Bazikamwe Jean Claude Mbonicura Gilbert Ndayizeye Department of Pediatrics Kamenge University Hospital Center Bujumbura Burundi Department of Obstetrics and Gynecology Kamenge University Hospital Center Bujumbura Burundi General Surgery Department Kamenge University Hospital Center Bujumbura Burundi Orthopaedy Department Kamenge University Hospital Center Bujumbura Burundi

Amniotic band syndrome is an acquired embryo-fetopathy. It is rare and is characterized by malformations mainly affecting the limbs but also the skull, face and thoraco-abdominal axis. Its etiopathogenesis remains poorly understood. Its diagnosis is essentially clinical and is classically based on the existence of signs such as furrows, amputations and pseudosyndactyly. To show the importance of antenatal diagnosis in resource-limited countries, we report the case of two newborns, one premature at 31 weeks and the other at term, in whom amniotic band syndrome was discovered incidentally at birth. It involved an amputation of the right leg for both cases. The premature baby was born in a context of neonatal sepsis and will succumb to the latter while the 2nd case was released from the hospital alive. Imaging examinations to search for probable congenital malformations could only be carried out for the 2nd case and no accessible congenital malformation had been identified. And as management of the disease, only psychological support to the parents was provided for the 2 cases. The antenatal discovery of a case of amniotic band syndrome in countries with low technical capacity such as Burundi should push clinicians to think in time about treatment options.

关键词： Amniotic Band Syndrome Embryo-Fetopathies Antenatal Diagnosis Limbs

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Delay Times and Clinical Outcomes in Acute Myocardial Infarction: Comparison of Periods before and during the COVID-19 Pandemic—Myocardial Infarction and the Pandemic

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World Journal of Cardiovascular Diseases 2024年第6期14卷 392-400页

作者： Clarice Teixeira Silva Araújo Arnon Salviato Mameri Thúlio Carrera Guarçoni Venturini Marcus Tadeu Aguilar Constantino Matos Igor Morais Araujo Lopes Luiz Gustavo Ribeiro de Carvalho Murad Cleberson Duartes Ovani Guilherme Vassalo Morais Fernanda Venturini de Castro Danielle Lopes Rocha Lucas Crespo de Barros Rodolfo Costa sylvestre Luiz Fernando Machado Barbosa Roberto Ramos Barbosa Internal Medicine Universidade Federal do Esprito Santo (UFES) Vitria Brazil Hospital Santa Casa de Misericrdia de Vitria Vitria Brazil Hospital Santa Rita de Cssia Vitria Brazil Hospital Estadual Dr. Jayme Santos Neves Serra Brazil Grupo Kora Sade Vitria Brazil Hospital Estadual Infantil e Maternidade Alzir Bernardino Alves (HIMABA) Vila Velha Brazil

Introduction: At the beginning of the COVID-19 pandemic, a drop in the number of patients treated for cardiac emergencies raised concern about cardiovascular mortality in that period. An increase in care delay for patients with ST-segment elevation myocardial infarction (STEMI) may have affected clinical outcomes. Objectives: To analyze delay times and clinical outcomes of patients with STEMI undergoing primary percutaneous coronary intervention (PPCI), before and during the COVID-19 pandemic. Methods: Retrospective observational study that included patients with STEMI undergoing PPCI from December 2018 to July 2021. The COVID-19 pandemic cases were divided into two groups: pandemic I—from March to August 2020;and pandemic II—from September 2020 to July 2021. Patients were compared according to the period of hospitalization. Primary outcomes were delay times in assistance and clinical outcomes (acute kidney injury [AKI], post-procedural vascular complications and in-hospital mortality). Results: 108 patients were included, 39 (36.1%) in the pre-pandemic period, 13 (12.1%) in pandemic I and 56 (51.8%) in pandemic II. Time from onset of symptoms to arrival at the service and door-to-balloon time did not differ significantly among groups. Vascular complications were more frequent during the pandemic (I and II) than in the pre-pandemic period (2.5% pre-pandemic vs 15.4% pandemic vs 12.5% pandemic II;p = 0.03). AKI incidence was similar in all three periods. There was a non-significant increase in in-hospital mortality during the COVID-19 pandemic. Conclusion: In patients with STEMI, there was an increase in vascular complications and a trend toward increased mortality during the COVID-19 pandemic. Delay times to admission and reperfusion did not differ significantly between before and during the pandemic.

关键词： Myocardial Infarction Primary Percutaneous Coronary Intervention Coronary Reperfusion Pandemic COVID-19

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Study of Photocatalytic Activity of a Nanostructured Composite of ZnS and Carbon Dots

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Advances in Nanoparticles 2022年第4期11卷 111-128页

作者： Irié Bi Irié Williams Essy kouadio Fodjo Pomi Bi Boussou Narcisse Aka Alla Martin Koffi Koffi Kra sylvestre Trokourey Albert Zhen Gu Laboratory of Constitution and Reaction of Matter UFR SSMT Université Felix Houphouet Boigny Abidjan Cote d’Ivoire Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Shanghai China

Environmental pollution jeopardizes our existence. For this purpose, research is moving more and more towards the search for economic means and green chemistry to curb this phenomenon. In this context, the photocatalytic activity of zinc sulfide nanoparticles (ZnS NPs) and nanostructured composite ZnS/carbon dots (ZnS/CDs) was evaluated after their synthesis. The results of X-ray diffraction (XRD) analysis indicate that the crystal structure of ZnS/CDs is identical to that of the cubic phase structure of ZnS, revealing that the cubic phase structure of ZnS was not altered in the presence of CDs. Indeed, there is no additional peak in the crystal structure of ZnS/CDs, revealing that the crystalline structure of ZnS is not responsible for the difference in photocatalytic activity between ZnS/CDs and ZnS NPs. Moreover, analysis performed by transmission electron microscopy (TEM) shows aggregation of the synthesized ZnS and ZnS/CDs nanoparticles with an average size estimated around 10 nm and 12 nm, respectively. In addition, the reflectance study in the visible range shows a reduction in the sunlight reflection intensity using ZnS/CDs compared to the capability of ZnS NPs. Photocatalytic degradation tests reveal that ZnS/CDs have the best methylene blue (MB) degradation rate. Indeed, under the optimal conditions, the photocatalytic activity can reach 100% efficiency within 100 min and 240 min of sunlight exposure for the degradation of 7.5 mg/L MB using ZnS/CDs and ZnS, respectively. This improvement in photocatalytic activity of ZnS/CDs may be due to the presence of CDs which can permit to undergo a reduction of reflection properties of ZnS NPs in the visible range. These results show that CDs can play a key role in enhancing the photocatalytic activity of ZnS, and suggest that ZnS/CDs could be used as eco-friendly composite materials for the degradation of organic pollutants of similar structures in the aquatic environment under solar irradiation.

关键词： Fluorescent Carbon Dots (CDs) Photocatalytic Degradation of Methylene Blue Sunlight Reflectance Property Synthesis of ZnS Nanoparticles

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Differential Pulse Voltammetric Simultaneous Determination of Paracetamol and Omnipaque on Boron Doped Diamond Electrode: Application to Natural Tomato, Carrot, Cucumber Juices and Wastewater

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American Journal of Analytical Chemistry 2023年第10期14卷 434-450页

作者： Koffi Konan Martin Sadia Sahi Placide kouadio Brou Albert Gnamba Corneil Quand-Même Fofié Thiery Auguste Appia Koffi Konan sylvestre Lassiné Ouattara UFR Environnement Université Jean Lorougnon Guédé Daloa C&ocircte d’Ivoire UFR Sciences et Technologies Université Alassane Ouattara Bouaké C&ocircte d’Ivoire Laboratoire de constitution et de réaction de la matière UFR SSMT Université Félix Houphouet Boiguy Abidjan C&ocircte d’Ivoire

This article describes the use of a boron-doped diamond electrode (BDDE) as an electrochemical sensor for the simultaneous determination of omnipaque (OMP) and paracetamol (PCM) in perchloric acid medium (HClO4 0.1 M) and in complex matrices such as tomato, carrot and cucumber juices and waste water from the Treichville University Hospital. Voltammetric studies allowed us to have well-defined oxidation peaks at distinct potentials of OMP (E = 0.5 V/SCE) and PCM (E = 0.7 V/SCE). Under optimized conditions, well-defined quantities of OMP and PCM, introduced simultaneously by metered additions, gave linear responses in concentration ranges of 259.8 - 467.2 μM for OMP and 58.73 - 116.3 μM PCM. The detection limits obtained are 7.23 μΜ and 3.6 μΜ respectively for OMP and PCM with recovery rates between 85.8% ± 0.1% and 92.6% ± 0.1% for OMP and between 99.9% ± 0.1% and 101.2% ± 0.4% for the PCM. This technique has been successfully used to simultaneously detect these pharmaceuticals in these complex environments. It allows recovery of OMP and PCM respectively up to 97.5% ± 0.0% and 91.6% ± 0.3% in tomato juice;100.0% ± 0.0% and 95.2% ± 0.2% in carrot juice;101.4% ± 0.1% and 97.3% ± 0.3% in cucumber juice;100.1% ± 0.9% and 100.9% ± 0.1% in wastewater. The relevance of this technique for the simultaneous detection of OMP and PCM in tomato, carrot, cucumber juices and in waste water can be studied in the context of the contamination of certain fruits and vegetables by the substances organic pharmaceuticals released into the environment without prior treatment.

关键词： Omnipaque Paracétamol Differential Pulse Voltammetry Boron Doped Diamond Electrode

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