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Clay Materials for Ceramics Application from N’Djamena in the Chad republic: Mineralogical, Physicochemical and Microstructural Characterization

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Journal of Materials Science and Chemical Engineering 2024年第2期12卷 31-48页

作者： Ndjolba Madjihingam Djoda Pagore jacques richard Mache Bebbata Warabi Bertin Pagna Kagonbe Patrick Mountapmbeme Kouotou Department of Civil Engineering National Advanced School of Engineering University of Maroua Maroua Cameroon Department of Mining Engineering School of Geology and Mining Engineering University of Ngaoundere Meiganga Cameroon Local Materials Authority Promotion (MIPrOMALO) Yaoundé Cameroon Department of Environmental Sciences Advanced School of Agriculture Forestry Water and Environment University of Ebolowa Ebolowa Cameroon

Herein, we report some characteristics of the clayey materials (CMs) collected from Kaliwa (C1), Kabé (C2) and Malo (C3) district in N’Djamena (Chad). Three samples were characterized applying XrF, XrD, FTIr, SEM. In addition, TGA/DSC were performed to control decomposition/mass loss and show phase transitions respectively of CMs. Geochemical analysis by XrF reveals the following minerals composition: SiO2 (~57% - 66%), Al2O3 (~13% - 15%), Fe2O3 (~6% - 10%), TiO2 (~1% - 2%) were the predominant oxides with a reduced proportion in C1, and (~7%) of fluxing agents (K2O, CaO, Na2O). Negligible and trace of MgO (~1%) and P2O5 was noted. The mineralogical composition by XrD shows that, C1, C2 and C3 display close mineralogy with: Quartz (~50%), feldspar (~20%) as non-clay minerals, whereas clays minerals were mostly kaolinite (~15%), illite (~5%) and smectite (~10%). FTIr analysis exhibits almost seemingly similar absorption bands characteristic of hydroxyls elongation, OH valence vibration of Kaolinite and stretching vibration of some Metal-Oxygen bond. SEM micrographs of the samples exhibit microstructureformed by inter-aggregates particles with porous cavities. TGA/DSCconfirm the existence of quartz (570˚C to 870˚C), carbonates (600˚C - 760˚C), kaolinite (569˚C - 988˚C), illite (566˚C - 966˚C), MgO (410˚C - 720˚C) and smectite (650˚C - 900˚C). The overall characterization indicates that, these clayey soils exhibit good properties for ceramic application.

关键词： Clay Soils Characterization Mineralogy Physicochemical Properties Ceramic Application

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AB型LaYNiMn（x=0.5,1.0,1.5）合金的结构和电化学储氢性能

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稀土 2024年

作者：贺祥云王辉徐杰钟海长赵世谦 Huot jacques 华南理工大学材料科学与工程学院广东省先进储能材料工程技术研究中心厦门理工学院材料科学与工程学院河南理工大学化学化工学院河南省煤炭绿色转化重点实验室魁北克大学三河分校氢能研究所

设计了AB4型La2YNi12-xMnx（x=0.5, 1.0, 1.5）储氢合金,通过优化淬火温度,制备了3r-AB4型单相La2YNi11Mn合金,探索了La-Y-Ni-Mn系AB4型超晶格相的形成规律和电化学储氢性能。研究发现,随着淬火温度的升高A5B19相转变为AB4相,在997℃得... 详细信息

设计了AB4型La2YNi12-xMnx（x=0.5, 1.0, 1.5）储氢合金,通过优化淬火温度,制备了3r-AB4型单相La2YNi11Mn合金,探索了La-Y-Ni-Mn系AB4型超晶格相的形成规律和电化学储氢性能。研究发现,随着淬火温度的升高A5B19相转变为AB4相,在997℃得到了AB4单相合金。Mn取代Ni增大了合金的晶胞体积,同时增大了[A2B4]亚单元体积,提高了合金的结构稳定性,改善了合金的电化学性能。AB4单相合金的最大放电容量为346m Ah/g,充放电循环300圈后容量为216.6 m Ah/g。

关键词：镍氢电池 La-Y-Ni系超晶格储氢合金 AB 相电化学性能

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景颇语致使范畴声调交替的历时演变构拟

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语言科学 2024年第2期23卷 199-208页

作者：饶敏向柏霖重庆工商大学重庆400067 法国国家科学研究中心法国巴黎75007

本文以景颇语中声调交替的致使动词为研究对象,试图从历史语言学的角度对该现象提出构拟和解释。本文论证了景颇语致使范畴的声调交替源自致使前缀脱落这一分析方法存在的问题,并参照基兰提支语言的相关现象提出了另外一种更可行的分析... 详细信息

本文以景颇语中声调交替的致使动词为研究对象,试图从历史语言学的角度对该现象提出构拟和解释。本文论证了景颇语致使范畴的声调交替源自致使前缀脱落这一分析方法存在的问题,并参照基兰提支语言的相关现象提出了另外一种更可行的分析,即景颇语致使范畴的声调交替不是因致使前缀脱落造成的变化,而是施用态-t后缀脱落留下的痕迹。

关键词：景颇语致使范畴声调交替施用态基兰提语言

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Mitigating Iron Toxicity by Using rock Phosphate to Improve rice Productivity

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Agricultural Sciences 2024年第4期15卷 423-438页

作者： Adama Bagayogo Honoré Kam jacques Sawadogo Moumouni Konate Moussa Sie Satoshi Nakamura Fujio Nagumo Mahamadou Sawadogo Ouaga I Uviversity Jospeph Ki-Zerbo Life and Earth Sciences Training and Research Unit (UFR/SVT) Ouagadougou Burkina Faso National Center for Scientific and Technological research National Institute of Environment and Agricultural Research (INERA) Bobo-Dioulasso Burkina Faso Japan International research Center for Agricultural Sciences Ibaraki Japan

Iron toxicity is a major constraint to rice production, particularly in highly weathered soils of inland valleys in Sub-Saharan Africa where the rice growing area is rapidly expanding. This study aimed to improve the productiveness of iron toxicity sensitive’s rice fields as well as in the unsensitive fields by using local phosphate fertilizers. Eighteen (18) rice genotypes were been assessed in a split plot design in two areas: without iron toxicity and with iron toxicity. NPK, NK, rock Phosphate, Triple super phosphate, Calcined phosphate and Acidulated phosphate were used as fertilizers. Data collection was focused on agronomic traits and yield (g/m2). The best fertilizers in the area without iron toxicity were NPK (820.2 g/m2) and triple super phosphate (751.7 g/m2). In the iron toxicity area, the best yields were performed by NPK (785.5 g/m2) and raw calcined phosphate (698.3 g/m2). Yet, the Accessions 15, Accessions 225, Accessions 226 and Accessions 270 were rainfed rice genotypes while CC109 A, HB 46 and HB 62 were low-land/irrigated rice genotypes. NPK, NK and acidulated phosphate fertilizers alleviate the best, iron toxicity in both sensitive and unsensitive rice fields.

关键词： Oryza NPK NK rock Phosphate rice

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Nutritional and Sanitary Quality of Infant Flours Produced in Ouagadougou, Burkina Faso

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Food and Nutrition Sciences 2024年第8期15卷 727-743页

作者： Léa Kilô Adam Bayala-Yaï Philippe Augustin Nikièma Hassane Sangaré Fabrice Bationo Imael Henri Nestor Bassolé jacques Simpore Laboratoire de Biologie Molculaire et de Gntique (LABIOGENE) Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Biologie Molculaire dEpidmiologie et Surveillance des Agents Transmissibles par les Aliments (LaBESTA) Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Microbiologie et de Physicochimie du Dpartement de Technologie Alimentaire (DTA) Institut de Recherche en Sciences Appliques et Technologies (IRSAT) Ouagadougou Burkina Faso

The quality of infant flours used during the weaning age is of great importance in that it conditions the nutritional health of infants and young children. This study aimed to assess the nutritional and sanitary quality of infant flours produced in the city of Ouagadougou. This was a cross-sectional study including 11 out of 25 infant flour production units that gave their consent to partake in the study. In total, 25 infant flour samples have been collected from July to September 2021. The physicochemical and microbiological parameters were determined according to standard methods. The ANOVA analysis of variance showed significant differences between the means of the physico-chemical and the means of the microbiological parameters respectively. The results showed that 60% of proteins and 80% of lipid and total carbohydrate contents were below the authorised limits. The energy values were below the authorised limit in 88% of the cases. All instant infant flours had microbiological loads compliant with Burkinabè standards. As for infant flour to be cooked, 63.64% and 81.82% had satisfactory numbers of total coliforms and faecal coliforms respectively. Staphylococcus aureus and Escherichia coli were detected in these samples with 86.36% of infant formulae having results below the recommended limit. These results show that the infant flours produced in Ouagadougou were somehow of acceptable quality. However, there is a need to improve the formulae for macronutrient contents, energy values and sanitary quality to comply with the recommendations.

关键词： Nutritional and Sanitary Quality Infant Flours Ouagadougou Burkina Faso

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上海戏剧学院“导演构思与创作实践”研究生课程汇报/2022级舞美设计MFA中期作品法国当代戏剧《红鲱鱼》剧照

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戏剧艺术 2024年第2期 I0003-I0004页

作者： [法]让-雅克·瓦鲁让不详

导演的话《红鲱鱼》这个戏吸引我的是剧中那些犀利的、耐人寻味的,又让人捉摸不透的东西,它既荒诞又寓言。人类的悲欢并不相通,这个戏探讨了现代人的处境,人和人之间的对抗与疏离、困惑与矛盾。这些又何止发生在上个世纪末的巴黎?且看... 详细信息

导演的话《红鲱鱼》这个戏吸引我的是剧中那些犀利的、耐人寻味的,又让人捉摸不透的东西,它既荒诞又寓言。人类的悲欢并不相通,这个戏探讨了现代人的处境,人和人之间的对抗与疏离、困惑与矛盾。这些又何止发生在上个世纪末的巴黎?且看我们的身边。我们能否在坠入空虚的世界之际保持清醒?能否改变这一切?很多事情,戏剧也给不了答案,只是映照人类困境的一面古老镜子。某种意义上说,《红鲱鱼》文本即是“红鲱鱼”,剧作家有意无意地将你引入他设下的迷局。剧中遍布的似有非有、无法言说的模糊地带,给舞台创作带来了多种可能,我们畅游,窥视一二。

关键词：上海戏剧学院舞美设计导演构思人类困境研究生当代戏剧创作实践模糊地带

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Neonatal Morbidity and Mortality at Hospital Saint Camille de Ouagadougou (HOSCO): A Study from 2017 to 2020

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Open Journal of Pediatrics 2024年第1期14卷 63-77页

作者： Nicaise Zagre Ines Kinda Abdoul Karim Ouattara Paul Ouedraogo Théodora Mahoukèdè Zohoncon Caroline Yonaba Fla Koueta jacques Simpore Hô pital Saint Camille de Ouagadougou (HOSCO) Ouagadougou Burkina Faso Faculté des Sciences de la Santé Université Saint Thomas d’Aquin (USTA) Ouagadougou Burkina Faso Laboratoire de Biologie Moléculaire et de Génétique (LABIOGENE) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Centre de recherche Biomoléculaire Pietro Annigoni (CErBA) Ouagadougou Burkina Faso Faculté des Sciences de la Santé Université Joseph KI-ZERBO Ouagadougou Burkina Faso

Introduction: Neonatal pathology remains a real public health problem in developing countries. In Burkina Faso, this mortality has declined over the last ten years but remains below compared to the Sustainable Development Goals, which is 12 per 1000 living births at most by 2030. This study aims to identify specific causes of neonatal morbidity and mortality and will contribute to the implementation of preventive and curative measures aimed at reducing neonatal mortality at HOSCO. Method: This was a retrospective study using the records and database of newborns hospitalized from January 1srt, 2017 to December 31srt, 2020. Using logistic regression, the factors associated with mortality were determined. results: During the study period, 3020 newborns were hospitalized. Most newborns (83.71%) were referred by a peripheral health facility. The average age at admission was 0.3 days ± 0.9 and the sex ratio was 1.2. Prematurity was the leading cause of hospitalization (61.13%) followed by neonatal infection (38.34%) and neonatal suffering (23.88%). The mortality rate was 40.6% with 82.71% cases of death in the early neonatal period. The main causes of death were low birth weight (47.39%), respiratory distress (18.76%), neonatal suffering (17.37%) and neonatal infection (13.87%). Home delivery, gestational age 36 weeks, number of PNC 4, concept of resuscitation, Apgar at the 5th minute 7, birth weight 2000 g and >4000 g, respiratory distress, hypothermia, neurological disorders were factors associated with deaths. Conclusion: Neonatal mortality is influenced by both maternal and fetal factors and many of them are preventable.

关键词： Morbidity Mortality Newborns Neonatology HOSCO

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Causes of Infertility of Couples residing in Libreville

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Advances in reproductive Sciences 2024年第1期12卷 75-82页

作者： Opheelia Makoyo Komba Ulysse Minkobame Pamphile Assoumou reteno retno Elsy Ntsame Anouchka Mewi jacques Albert Bang Ntamack Jean François Meye Département de gynécologie obstétrique Université des sciences de la santé d’Owendo Libreville Gabon

Introduction: According to the World Health Organization, globally one in six people experience infertility in their lifetime. Infertility is considered as a major and global public health issue. In most cases, women bear the burden of infertility to protect the male ego. Although men and women are equally likely to have fertility problems. The aim of this study was to identify the causes of infertility of couples residing in Libreville. Patients and Methods: This was a retrospective descriptive study performed over 2 years, from 1st January 2021 to 31st December 2022. Data was obtained from 162 couples attending the assisted reproduction department of the mother and child hospitals in Libreville. Statistical analysis was done using IBM SPSS Statistics version 22.0 software. results: During the study period, 28.5% of couples could afford IVF treatment. The average for woman age was 39.1 ± 4.06 while the average age for male patients was 41.53 ± 7.08 years with minimum and maximum age of 34 et 66 years. More than half (58.6%) of female partners were employed in the public sector. Half of the male partners (50%) were employed in the private sector. The median duration of infertility was 6 years. Approximately 49.4% of couples were diagnosed with primary infertility. The most common causes of infertility in female patients were Fallopian tubes obstruction (53.2%), uterine factors (24.2%) and hormonal problems (19.6%). With regards to male factors infertility, testicular causes were predominant (53.6%). Oligoasthenoteratozoospermia were the major semen abnormalities (55.7%) found after semen evaluation. Both male and female partners were sub-fertile in 47.5% of cases. Unexplained infertility was found in 11% of couples. Conclusion: This study showed that the diagnostic of infertility faced by couples residing in Libreville should involve both male and female partner.

关键词： Epidemiology Gabon Infertility

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APOBEC3G role on HIV Infection in Africa: A Systematic review

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American Journal of Molecular Biology 2024年第1期14卷 25-42页

作者： Tegwinde rebeca Compaore Abdoul Karim Ouattara Adama Baguiya Lassina Traore Abdou Azaque Zoure Henri Gautier Ouedraogo Seni Kouanda jacques Simpore Biomedical and Public Health Department Institut de Recherche en Sciences de la Santé (IRSS)/CNRST Ouagadougou Burkina Faso Laboratoire de Biologie et de Génétique Moléculaire (LABIOGENE) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Centre de recherche Biomoléculaire Pietro Annigoni (CErBA) Ouagadougou Burkina Faso Université Norbert Zongo (UNZ) Centre Universitaire de Manga Koudougou Burkina Faso

The highly active antiretroviral treatment (HAArT) has allowed people living with HIV to live longer with a better quality of life. However, toxicity and the emergence of drug resistance arise from HAArT use. Therefore, new antiretroviral therapy is needed since no cure or vaccine is available against HIV. Virus-host interaction has been proven to be important in the last decade. Host factors such as the C-C chemokine receptor type 5 (CCr5), a receptor used by HIV to penetrate host cells, have led to the discovery of the Maraviroc, which is an antiretroviral medication used in the United States. In contrast, other factors like C-X-C Motif Chemokine receptor 4 (CXCr4) and the Apolipoprotein B mrNA editing enzyme catalytic polypeptide-like 3G (APOBEC3G), a potent host defense factor against HIV, is under investigation. APOBEC3G antiviral activity remains a possible therapeutic target against HIV. This systematic review aimed to synthesize the available evidence on the role of APOBEC3G polymorphisms and their expression on HIV infection disease progression in Africa. We used Web of Science, PubMed, Embase, and Google Scholar and searched for relevant publications in French or English reporting on APOBEC3G polymorphisms association with HIV infection in African populations from January 2009 to May 2023. The PrISMA (Preferred reporting Items for Systematic reviews and Meta-analyzes) was used to process for reporting systematic review. Fifteen studies were included, of which seven were on APOBEC3G polymorphisms and eight were on APOBEC3G expression. Among the APOBEC3G polymorphisms, the most studied was H186r or rs8177832. The average of the minor allele frequency of H186r of APOBEC3G available for the studies included in this study was 0.29 with a 95% CI (0.172;0.401) and varied from 0.108 reported in Uganda to 0.47 recorded from Burkina Faso. The polymorphism H186r was not associated with HIV status in Southern Africa. However, the referent allele of H186r was protectiv

关键词： APOBEC3G HIV Genetic Variation Therapeutic Target African Populations

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Dosage Formula in Anesthesia for Manual Intrauterine Aspiration Post-Abortion in resource-Limited Settings

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Pharmacology & Pharmacy 2024年第4期15卷 71-80页

作者： Serge Ibula rivain Iteke Berthe Barhayiga Doddie Tsansya roger Cishugi Jean jacques Kalongo Sandra Sagboze Jean Paul Cikwanine Dieudonné Sengeyi ISTM/Bukavu Anesthesia-resuscitation Section CIMAC Hospital Center in Goma Goma The Democratic Republic of the Congo Department of Anesthesia-resuscitation University of Lubumbashi Lubumbashi The Democratic Republic of the Congo Department of Anesthesia-resuscitation University of Kinshasa Kinshasa The Democratic Republic of the Congo Department of Gyneco-Obstetrics University of Kinshasa Kinshasa The Democratic Republic of the Congo Anesthesia-resuscitation Department Panzi Hospital Bukavu The Democratic Republic of the Congo

Setting: Provincial General reference Hospital of Bukavu, General reference Hospital of Panzi, General reference Hospital of Ciriri, General reference Hospital of Nyatende and Biopharm Hospital Center. Objective: Contribute to the improvement of the anesthetic ECP of patients benefiting from MVA for incomplete abortion, Describe the methodology used for adoption of the dosage formula in Anesthesia for MVA, present the mathematical demonstration leading to the dosage formula in anesthesia for MVA. Materials and Methods: Our study was descriptive by mathematical demonstration of obtaining the equilibrium constant of the dosage formula of bipuvacaine 0.1% and Fentanyl 50 µg% adapted to the weight and specific size of patients treated anesthetically in MVA cases for incomplete abortion. We also carried out an operational research by first determining the interval where our equilibrium constant is included and secondly by means of the ends of the intervals found correlated to the ends of intervals of possible weights and sizes in the being normal human female of childbearing age to arrive at the real numerical value of the equilibrium constant of the BUKAVU Dosage Formula in the case of anesthesia for MVA during the management of incomplete abortions. results: TWO-STAGE OPErATIONAL rESEArCH: • Determination of the interval where the equilibrium constant x = −0.95 x x by crossing the means between the extremes of volumes of anesthetic drugs giving a satisfactory sensory block without hemodynamic disturbance and the extremes of normal weight and height for women of childbearing age. We ended up with X = 0.37. Conclusion: At the end of our study which had the general objectives of contributing to the improvement of the anesthetic PEC of patients receiving MVA for incomplete abortion and specific objectives of describing the methodology used for adoption of the dosage formula in Anesthesia for MVA and present the mathematical demonstration which resulted in the dosage formul

关键词： Dosage Anesthesia Intrauterine Aspiration Dr Congo

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