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Multivariate Approach to Characterizing Soil Quality of Gabonese’s Ferralitic Soils

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Open Journal of Soil Science 2024年第4期14卷 237-268页

作者： Neil-Yohan Musadji Rolf Gaël Mabicka Obame michel Mbina Mounguengui jean Aubin Ondo Lydie-Stella Koutika Eric Ravire Claude Geffroy Laboratoire De Chimie Des Milieux et Des Mat&#233riaux Inorganiques Laboratoire D&#8217Analyse Des Sols et Environnement D&#233partement Des Sciences Fondamentales De L&#8217Ing&#233nieur Institut National D&#8217Agronomie et De Biotechnologies Universit&#233 Des Sciences et Techniques De Masuku Franceville Gabon Institut De Chimie Des Milieux et Maté riaux De Poitiers (IC2MP) Universit&#233 De Poitiers Poitiers France Laboratoire De Chimie Des Milieux et Des Mat&#233riaux Inorganiques Laboratoire D&#8217Analyse Des Sols et Environnement D&#233partement De Phytotechnologie Institut National D&#8217Agronomie et De Biotechnologies Universit&#233 Des Sciences et Techniques De Masuku Franceville Gabon Dé partement De G&#233ologie Facult&#233 Des Sciences Universit&#233 Des Sciences et Techniques De Masuku Franceville Gabon Laboratoire Pluridisciplinaire Des Sciences Ecole Normale Sup&#233rieure Libreville Gabon Centre De Recherche Sur La Productivité et La Durabilit&#233 Des Plantations Industrielles Pointe Noire Republic of Congo Sucaf Gabon Somdiaa Franceville Gabon

Assessing soil quality is essential for crop management and soil temporal changes. The present study aims to evaluate soil quality in the Ferralitic soils context countrywide. This assessment was done using multivariate soil quality indice (SQI) models, such as additive quality index (AQI), weighted quality indexes (WQIadd and WQIcom) and Nemoro quality index (NQI), applied to two approaches of indicator selection: total data set (TDS) and minimum data set (MDS). Physical and chemical soil indicators were extracted from the ORSTOM’s reports resulting from a sampling campaign in different provinces of Gabon. The TDS approach shows soil quality status according to eleven soil indicators extracted from the analysis of 1,059 samples from arable soil layer (0 - 30 cm depth). The results indicated that 87% of all provinces presented a very low soil quality (Q5) whatever the model. Among soil indicators, exchangeable K+ and Mg2+, bulk density and C/N ratio were retained in MDS, using principal component analysis (PCA). In the MDS approach, 50 to 63% of provinces had low soil quality grades with AQI, WQIadd and NQI, whereas the total was observed with WQIcom. Only 25% of provinces had medium soil quality grades with AQI and NQI models, while 12.5% (NQI) and 25% (AQI) presented high quality grades. Robust statistical analyses confirmed the accuracy and validation (0.80 r P ≤ 0.016) of AQI, WQIadd and NQI into the TDS and MDS approaches. The same sensitivity index value (1.53) was obtained with AQI and WQIadd. However, WQIadd was chosen as the best SQI model, according to its high linear regression value (R2 = 0.82) between TDS and MDS. This study has important implications in decision-making on monitoring, evaluation and sustainable management of Gabonese soils in a pedoclimatic context unfavorable to plant growth.

关键词： Gabon Ferralitic Soil Soil Indicators Standard Score Function Soil Quality Indices Sustainable Soil Soil Management

Surgical Site Infections in Trauma and Orthopaedics at Bouaké Teaching Hospital (Côte d’Ivoire)

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Open Journal of Orthopedics 2024年第9期14卷 381-390页

作者： Loukou Blaise Yao Koffi Léopold Krah Aya Adelaïde Natacha Kouassi Kouamé Innocent M’bra Kouamé jean-Eric Kouassi michel Kodo Department of Trauma and Orthopaedics Bouak Teaching Hospital Bouak Cte dIvoire

Background: Surgical site infections are serious healthcare problems. The aim was to describe the epidemiological, diagnostic, therapeutic, and prognostic aspects of surgical site infections in Trauma and Orthopaedics at Bouaké Teaching Hospital. Method: This retrospective, descriptive, and analytical study was conducted from January 2019 to December 31, 2021. The data studied included prevalence, initial lesions, type of surgical intervention, type of SSI, bacteria involved, treatment, and outcomes. Results: Forty-four (11%) of the 399 patients included in the study developed a surgical site infection. The mean age was 27 years, with 36 male and 8 female. Initial lesions were predominantly open fractures (n = 31;70%), with a mean delay of 48 hours for surgical management. Emergency interventions accounted for 70% (n = 31) of cases. The NNISS infection risk score was 1 in 80% (n = 35) of cases. Superficial infections (n = 34;77%) appeared early, on a mean 6 days postoperatively. Bacteriological analysis primarily identified Pseudomonas aeruginosa (n = 10;23%), sensitive to Imipenem and Chloramphenicol but resistant to Amoxicillin-clavulanic acid, Ceftriaxone, Gentamicin, and Ciprofloxacin. Multidrug-resistant bacteria were found in 89% (n = 8) of cases, with all bacteria resistant to Ceftriaxone. Surgical revision was performed in 10 patients (23%), primarily involving debridement with hardware retention (n = 7;70%). Chloramphenicol was the most commonly used antibiotic post-antibiogram (61%). Outcomes were favourable in 98% of cases. Identified risk factors included the type of lesion according to NRC classification, the delay in managing open fractures, and the NNISS score. Conclusion: The prevalence of surgical site infection was 11%, favoured by the delayed operation of open fractures.

关键词： Surgical Site Infection Open Fractures Pseudomonas aeruginosa Ceftriaxone

Phytochemical Analysis and Antioxidant Activity of Aqueous and Hydroethanolic Extracts from Three Anticancerous Fabaceae of Northern Cameroon Pharmacopoeia

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Journal of Biosciences and Medicines 2024年第6期12卷 19-32页

作者： Halmata Mohamadou Landry Lienou Lienou Richard Simo Tagne Herve Pabamé Kada Elisee Libert Enyengue Embolo Grace Kembaou Nganwa jean Louis Oyono Essame Piere michel Dongmo Jazet Anatomy and Cytology Pathology Laboratory Institute of Medical Research and Medicinal Plants Studies (IMPM) Yaound Cameroon Department of Biochemistry Faculty of Science University of Douala Douala Cameroon Department of Biomedical Sciences University of Ngaoundere Ngaoundere Cameroon General Hospital of Garoua (HGG) Garoua Cameroon Anatomo-Cytopathology Department of Biological Sciences Faculty of Medicine and Pharmacy University of Douala Douala Cameroon

Background: Cancer continues to pose a significant threat to our society, representing one of the most pressing health concerns worldwide. This study aimed to evaluate the chemical composition and the antioxidant activity of aqueous and hydroethanolic extracts from Acacia nilotica (An), Bauhinia reticulate (Br), and Tamarindus indica (Ti) of Fabaceae family, traditionally used in Northern Cameroon for cancer treatment. Methods: The phytochemical screening of the three plants was conducted using conventional colorimetric methods, followed by the measurement of total phenol content, flavonoids, and tannins. The antiradical and antioxidant activities of both plant extracts were assessed through FRAP, ABTS, and DPPH methods. A principal components analysis was employed to correlate the quantities of the evaluated secondary metabolites with the activities. Results: Both types of extracts from the three plants contain alkaloids, saponins, flavonoids, phenolic compounds, tannins, glycosides, terpenoids, coumarins, anthocyanins, and anthraquinones. The aqueous extracts of Br and An are significantly richer (p Conclusion: The three Fabaceae plants from northern Cameroon, prepared in different solvents, can be utilized for their antiradical properties in cancer treatment.

关键词： Cancer Antioxidant Fabaceae Phenolic Compounds Aqueous Extract Hydroethanolic Extract

Activity Enhancement of MgCl2-supported Ziegler-Natta Catalysts by Lewis-acid Pre-treatment for Ethylene Polymerization

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Chinese Journal of Polymer Science 2019年第10期37卷 1031-1038,I0006页

作者： Matthieu humbert Sébastien Norsic jean Raynaud Vincent Monteil UMR 5265 Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2) Université de Lyon

Ziegler-Natta precatalysts were synthetized from Lewis-base-modified-MgCl2 supports and treated by various Lewis acids,prior to activation by triethylaluminum, in order to increase their activity in ethylene polymerization. BCl3 provided the highest increase in activity. Interestingly, polymerization results showed no substantial modification of polymer properties, which is consistent with that Lewis acid only promotes the creation of new active sites, after activation by TEA, possessing very similar features to the original ones achievable with conventional precatalysts(i.e. without Lewis-acid treatment).

关键词： Ziegler-Natta catalysis Ethylene polymerization Heterogeneous catalysis Lewis acids

Evaluation of Colorectal Cancer Management in Eastern DR Congo. About 55 Cases Were Collected from January 2002 to December 2016 Panzi General Referral Hospital

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Journal of Cancer Therapy 2024年第4期15卷 179-189页

作者： Bafunyembaka Muka Alain Kitumaini Munyahali John Ciruza Balegana jean-Claude Lobe Lottin michel Luhiriri Ndanda Levi Kavira Isse Somo Prisca Amisi Mangaza Emilie Alumeti Munyali Desire Ahuka Ona Longombe Albert Department of Surgery H.G.R Panzi/Universit&#233 Evang&#233liqueen Afrique Bukavu DR Congo

A retrospective study was conducted at the HGR de Panzi in eastern DR Congo to determine the profile of colorectal cancer (CRC) management based on 55 cases out of 129 digestive cancers diagnosed in the digestive surgery, endoscopy, and pathology department of the HGR de Panzi from January 2002 to December 2016. The prevalence of CRC was 42.6%. The mean age of patients was 50.8 years, with a range of 20 to 81 years. The male to female ratio was 2.2. In 69.1% of cases, the patients had a low socioeconomic status, and 52.7% had a history of hemorrhoids. Rectorrhagia revealed CCR in 49.1% of cases. The mode of discovery was predominantly emergency in 69.1% of cases, and 58.20% of CRCs were diagnosed by an initial endoscopy of the lower colon. Adenocarcinoma was found in 94.5% of cases, and 45% of cases required abdominoperineal amputation. Various postoperative complications were experienced by 54.5% of patients, and 25.5% of patients died. To decrease the occurrence of these types of cancers, it is necessary to focus on early detection in the population and enhance access to primary healthcare for everyone.

关键词： Assessment Management Colorectal Cancer

雄高尔《圣安东尼的磨难》——其图像学以及对德国艺术的影响

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美术 2024年第9期 122-135页

作者： [法]让·米歇尔·马桑赵津(译) 赵成清(译) 剑桥大学艺术史系中央民族大学四川大学艺术学院

德国画家、雕塑家雄高尔的《圣安东尼的磨难》是描绘圣安东尼被恶魔攻击的经典作品,其创作灵感源自《安东尼传》中关于圣安东尼的描述。通过将圣安东尼置于空中受恶魔攻击的场景,雄高尔成功展现了圣徒的冷静与从容。该作品对后世德国、... 详细信息

德国画家、雕塑家雄高尔的《圣安东尼的磨难》是描绘圣安东尼被恶魔攻击的经典作品,其创作灵感源自《安东尼传》中关于圣安东尼的描述。通过将圣安东尼置于空中受恶魔攻击的场景,雄高尔成功展现了圣徒的冷静与从容。该作品对后世德国、意大利等地的艺术家产生了深远影响。本文通过详细分析雄高尔的版画风格、恶魔形象以及与其他艺术作品的关联,探讨其在恶魔图式发展中的独特贡献。

关键词：雄高尔圣安东尼的磨难恶魔图式德国艺术

Epidemiological and Clinical Profile of Children Exposed to SARS-CoV-2 at the COVID-19 Treatment Center at the ISIRO Hospital and WATSA in the Democratic Republic of the Congo

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Journal of Biosciences and Medicines 2024年第9期12卷 73-81页

作者： Hilaire Lisimo Abwa David Azako michel Ngbatala Bienvenu Apenya Jolie Mambeizidra Julbert Malangu Eugene Kumbodimo George Mutuale Herman Luhavo jean Claude Gbundu Fiston Bolanda François Enze Marie Tasile Yvette Kpakpo Nyange Nicholas Katembo Clinics Universitaires Uele Department of Pediatrics Faculty of Medicine University of Uele Isiro Democratic Republic of the Congo General Hospital of Isiro Isiro Democratic Republic of the Congo Division Provinciale de la Sant du Haut Ul Isiro Democratic Republic of the Congo Additional Vaccination Program for Watsa Watsa Democratic Republic of the Congo Center Hospitalier KIBALI Durba Democratic Republic of the Congo Hospital General of Watsa Watsa Democratic Republic of the Congo

Introduction: COVID-19, an emerging infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), typically presents with mild clinical manifestations in pediatric populations. As in many other regions of the Democratic Republic of the Congo (DRC), the COVID-19 pandemic affected children in Haut-Uélé, a province bordering South Sudan and Uganda. This study aimed to describe the epidemiological profile of COVID-19 in pediatric population in this area. Materials and Methods: This descriptive cross-sectional study was conducted over a 6-month period from August 1, 2021 to February 7, 2022. It included all patients aged 0 to 19 years with confirmed COVID-19 using RT-PCR and managed at the COVID-19 Treatment Centers (CTCO) in ISIRO and WATSA. Data were collected from patient records supplemented by the dataset from the service of Health Information System (SNIS) and the Epidemiological Surveillance Commission of the Provincial Health Division (DPS). Epidemiological and clinical profiles were analyzed. All statistical analyses were performed using SPSS software, Version 18. Results: During the 4th wave of the pandemic, 5 out of 13 health zones in Haut-Uélé province were affected, with a total of 569 recorded cases;45 of them were children aged 0 to 19 years (7.9%). Asymptomatic cases accounted for 33.3% (15 cases). The mean age was 9.88 ± 5.49 years, with the most affected age group being 10 - 14 years (44.45%). There was a predominance of males (73.3%), with a male-to-female sex ratio of 2.75. Half of the patients (53.3%) were from Watsa Health Zone. A seasonal peak was observed between December and January. Comorbidities were present in 10% of infected patients, and nearly half of participants were contacts of infected individuals. The primary reasons for admission were fever (66.66%), followed by rhinorrhea (57.77%) and cough (31.11%). All patients responded favorably to treatment. Conclusion: The proportion of pediatric COVID-19 cases at t

关键词： COVID-19 Morbi-Mortal Emergency Haut-Uélé

Species and endosymbiont diversity of Bemisia tabaci （Homoptera： Aleyrodidae） on vegetable crops in Senegal

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Insect Science 2015年第3期22卷 386-398页

作者： Delatte Helene Baudin Remy Becker Nathalie Girard Anne-Laure Ramatoulaye Sidebe Traore Lett jean-michel Reynaud bernard CIRAD UMR PVBMT F-97410 Saint-Pierre La Reunion France Museum National d'Histoire Naturelle Institut de Systematique Evolution Biodiversite ISYEB UMR 7205 CNRS UPMC EPHE 75005 Paris France TECHNISEM Zone d'activite Anjou Actiparc de Jumelles 49160 Longue-Jumelles France

Bemisia tabaci-transmitted geminiviruses are one of the major threats on cassava and vegetable crops in Africa. However, to date, few studies are available on the diversity orB. tabaci and their associated endosymbionts in Africa. More than 28 species have been described in the complex ofB. tabaci cryptic species; among them, 2 are invasive pests worldwide： MED and MEAM1. In order to assess the species diversity orB. tabaci in vegetable crops in Senegal, several samplings in different localities, hosts and seasons were collected and analyzed with nuclear （microsatellite） and mitochondrial （COI） markers. The bacterial endosymbiont community was also studied for each sample. Two species were detected： MED Q1 and MEAM1 B. Patterns of MED Q1 （dominance on most of the samples and sites, highest nuclear and mitochondrial diversity and broader secondary endosymbiont community： Hamiltonella, Cardinium, Wolbachia and Rickettsia）, point toward a predominant resident begomovirus vector group for MED Q 1 on market gardening crops. Furthermore, the lower prevalence of the second species MEAM1 B, its lower nuclear and mitochondrial diversity and a narrower secondary endosymbiont community （Hamiltonella/Rickettsia）, indicate that this genetic group is exotic and results from a recent invasion in this area.

关键词： begomovirus vectors endosymbionts diversity MED and MEAM 1 species microsatellites mtCOI phylogeny whitefly

A Pivotal Role of DELLAs in Regulating Multiple Hormone Signals

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Molecular Plant 2016年第1期9卷 10-20页

作者： jean-michel Daviere Patrick Achard Institut de Biologie Moleculaire des Plantes (IBMP) UPR2357 associe avec l'Universite de Strasbourg 12 rue General Zimmer 67084 Strasbourg Cedex France

Plant phenotypic plasticity is controlled by diverse hormone pathways, which integrate and convey infor- mation from multiple developmental and environmental signals. Moreover, in plants many processes such as growth, development, and defense are regulated in similar ways by multiple hormones. Among them, gibberellins （GAs） are phytohormones with pleiotropic actions, regulating various growth processes throughout the plant life cycle. Previous work has revealed extensive interplay between GAs and other hor- mones, but the molecular mechanism became apparent only recently. Molecular and physiological studies have demonstrated that DELLA proteins, considered as master negative regulators of GA signaling, inte- grate multiple hormone signaling pathways through physical interactions with transcription factors or reg- ulatory proteins from different families. In this review, we summarize the latest progress in GA signaling and its direct crosstalk with the main phytohormone signaling, emphasizing the multifaceted role of DELLA proteins with key components of major hormone signaling pathways.

关键词： gibberellins DELLAs hormone crosstalk plant development phenotypic plasticity