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Abundance and Source Identification of Polycyclic Aromatic Hydrocarbons in Sediments of the Ivory Coastal Zone (Toukouzou Hozalem-Assinie)

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American Journal of Analytical Chemistry 2023年第1期14卷 12-27页

作者： Laure Emma Oura Vanh Eric-Simon Zran Georges Kouadio Horo Koné Affoué Tindo Sylvie konan Albert Trokourey kouassi Benjamin Yao Fofana Bakary Laboratoire des Procédés Industriels de Synthèse de l’Environnement et des Energies Nouvelles (LAPISEN) de l’Institut National Polytechnique Félix Houphouë t Boigny de Yamoussoukro Yamoussoukro C&ocirc te d’Ivoire Centre Analyses et Recherche (CAR) Petroci Holding Abidjan C&ocirc te d’Ivoire Laboratoire de Constitution et Réaction de la Matière (LCRM) Université Félix Houphouet Boigny Abidjan Cote d’Ivoire Department of Science and Technology Université Alassane Ouattara de Bouaké Bouaké C&ocirc te d’Ivoire Laboratoire de Thermodynamique et de Physico Chimie du Milieu Université Nangui Abrogoua Abidjan C&ocirc te d’Ivoire Centre D’Analyse et de Recherche de la PETROCI (DCAR) Cô te d’Ivoire. Immeuble les Hevéas-14 Bd Carde Abidjan Cote d’Ivoire

Polycyclic aromatic hydrocarbons (PAHs) are strongly associated with agricultural, residential, transportation, industrial and petroleum activities. In this study, the presence of PAHs (polycyclic aromatic hydrocarbons) was investigated in sediments of the ivory coastal zone (Toukouzou Hozalem-Assinie). The main objectives of this study were to determine the abundance and to predict the source of PAHs in the sediments. Gas chromatography-mass spectrometry (GC-MS) was used to analyze sixteen priority PAHs. Total PAHs concentrations were from 1.31 to 3992.68 mg/kg in sediment with an average concentration of (307.54 ± 16.10) mg/kg. Among all PAHs, Naphthalene (Nap = 332.72 mg/kg) and Phenanthrene (Phe = 41.75 mg/kg) were found in the highest concentration, whereas Benzo (k) Fluoranthene was found in the least concentration in the range of 0 - 0.85 mg/kg (mean 0.24 mg/kg). Bassam-Modeste Lagune (BML) sampling site was the site with the highest concentration of total PAHs (all 16 PAHs) compared to the others due to their location in a highly populated estuary area that receives commercial, tourism, port, petroleum and heavy industrial activities. Diagnostic ratios were used to determine the sources of PAHs and suggested that the PAH profile in the sediments was dominated by 2 and 3 ring PAHs. The patterns of PAH compounds in sediment indicated that contamination is from mixed sources, with a strong indication of petrogenic contamination potentially from spills of fuel, oil and industrial activities.

关键词： Polycyclic Aromatic Hydrocarbons Sediment Source Abundance Ivorian Coastal

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Edible Ectomycorrhizal Mushrooms Russula spp. of Côte d’Ivoire: Total Phenolic Content, HPLC-Profiles of Phenolic Compounds and Organic Acids, Antioxidant Activities

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Journal of Agricultural Chemistry and Environment 2016年第2期5卷 73-84页

作者： Kouamé Appolinaire kouassi Eugène Jean Parfait Kouadio Kouakou Martin Djè Ahipo edmond Dué Lucien Patrice Kouamé Laboratoire de Biocatalyse et des Bioprocédés UFR des Sciences et Technologie des Aliments Université Nangui Abrogoua (Ex Université d’Abobo-Adjamé) Abidjan C&ocirc te d’Ivoire

The aim of this study was to investigate the phenolic compounds content, HPLC-profiles of phenolic compounds and organic acids, and also antioxidant activities via the ability to scavenge DPPH radical of three wild edible mushrooms belonging to Russula genus and being collected in center of Côte d’Ivoire. Total phenolic compounds, flavonoids and tannins contents of methanolic extracts were assessed by colorimetric assays. So, the obtained values of these chemical parameters ranged from 394.05 to 513.50 mg/100 g DW, 94.50 to 139.95 mg/100 g DW and from 124.20 to 165 ± 0.54 mg/100 g DW, respectively. Otherwise, HPLC-profiles of the methanolic extracts revealed that quercetin, salicylic acid and tannin ol were the main phenolic compounds in R. delica whereas R. lepida contained gallic acid, catechin and protocatechuic acid as main phenolic compounds. Besides, it showed that the phenolic compounds such as salicylic acid, tannin ol and catechin were observed in R. mustelina. As for HPLC-profiles of organic acid, the fumaric and malic acid were recorded as the main organic acids in the three species of wild edible mushrooms. However, citric acid content was found to be highest in R. lepida. The methanolic extracts of the three mushrooms exhibited high DPPH radical scavenging activities ranging from 74.92% to 58.92%. These wild edible mushrooms could be considered a potential supply source of adequate natural antioxidant for local population.

关键词： Ectomycorrhizal Mushrooms Côte d’Ivoire Phenolic Compounds Organic Acids DPPH Scavenging Activities

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Mineralization of Natural Spring Water in the City of Daloa (West-Central Côte d’Ivoire)

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Journal of Geoscience and Environment Protection 2020年第12期8卷 200-210页

作者： Eblin Sampah Georges konan Kouakou Séraphin Ohou-Yao Marie-Jeanne Adélaïde Mangoua Oi Mangoua Jules Dibi Brou kouassi Kouakou Lazare Department of Earth Sciences Jean Lorougnon Guédé University of Daloa Cote d’Ivoire

The water from natural springs in the city of Daloa is increasingly used by the population for its drinking water needs, even though its quality remains unknown. This study aims to determine the acquisition mechanism of the mineralization of these waters. Thus, physicochemical analyses were carried out on 10 spring water samples in February 2019. A summary statistical analysis of the results obtained shows that these waters are acidic (4.81 ≤ pH ≤ 5.39) and very weakly mineralised, with 50% of the conductivities below 100 μS·cm-1. The average iron (0.5 ± 1.02 mg/L) and manganese (0.61 ± 0.90 mg/L) contents show that these two parameters are increasing in the spring water. The Normalized Principal Component Analysis (NPCA) shows that mineralization is mainly controlled by surface inputs of elements (anthropogenic pollution), then the oxidation-reduction phenomenon and, finally, the water-rock contact (mineralization-residence time). Otherwise, the very low expression of water-rock contact (mineralization-residence time) in the acquisition of the mineralization reflects a short residence time of the water in the aquifer.

关键词： NPCA Mineralization Natural Spring Daloa Côte d’Ivoire

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Residual Effects of Phosphate Amendments on Rainfed Rice (Oryza sativa L.) Nutrition and Soil Properties in Three Agroecological Zones of Côte d’Ivoire

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Open Journal of Soil Science 2024年第10期14卷 606-634页

作者： Affi Jeanne Bongoua-Devisme Wondouet Hippolyte Kpan Pla kouassi Adou Franck Michaël Lemonou Bahan konan-Kan Hippolith Kouadio Anselme Kan Louis Koko Dpartement de Pdologie et Agriculture Durable UFR STRM Universit FHB Abidjan Cte dIvoire Centre National de Recherche Agronomique-CNRA de Man Man Cte dIvoire Office Chrifiens des Phosphates (OCP) Abidjan Cte dIvoire

A study was conducted in Côte d’Ivoire to assess the after-effect of phosphate amendments on rice yields and soil properties. Eight types of amendments, composed of Moroccan phosphate rock (PRM) and triple superphosphate were tested in three agroecological zones over three consecutive years of cultivation. This study revealed that the application of Moroccan phosphate rock (PRM) and/or triple superphosphate (TSP) did not significantly affect soil cation exchange capacity (CEC) and organic carbon (Corg) content. However, there was a negative residual effect of PRM-rich treatments on soil pH and K and N content, but the impact varies depending on the characteristics of the soils studied. Furthermore, nutrient losses, notably nitrogen from −17.5 to −267.7 kg/ha and potassium (−0.1 to 0.7 kg/ha), were observed in all treatments. Only phosphorus showed a positive balance of +49.56 to +52 kg/ha in PRM-rich treatments. Treatment T3, composed of 80% RPM and 20% TSP, was the most effective in all zones, with a relative increase in grain yields of over 100% compared to the control. These results suggest that the input of natural phosphate rock can significantly improve rice yields and soil properties in the studied agroecological zones in Côte d’Ivoire.

关键词： Phosphate Amendment Moroccan Phosphate Rock Triple Superphosphate Yield After-Effect Nutrition Crop Balance Cote d’Ivoire

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Epidemiology and Prognosis of Hepatocellular Carcinoma (HCC) in the Internal Medicine Department of the Bouake University Hospital (Côte d’Ivoire)

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Open Journal of Gastroenterology 2024年第9期14卷 289-299页

作者： Nguessan Michel konan Stéphane Yapa Lauret kouassi Tiépé Rokia Ouattara Kadidiata Touré Fiacre Abbé Georges Stéphane Koffi Bourhaïma Ouattara Department of Internal Medicine Treichville Teaching Hospital Abidjan Cte dIvoire Medical Sciences Training and Research Unit Flix Houphouet Boigny University Abidjan Cte dIvoire Department of Internal Medicine Teaching Hospital of Bouake Bouake Cte dIvoire Medical Sciences Training and Research Unit Alassane Ouattara University Bouake Cte dIvoire

Background and Objective: Hepatocellular carcinoma (HCC) is a public health problem due to its high incidence and high mortality rate. The epidemiology and prognosis of this disease is poorly documented in Bouake. The aim of the study was to describe the epidemiological aspects and identify the predictors of death in patients hospitalized for HCC in the Internal Medicine Department of the Bouake University Hospital in order to improve patient management. Material and Methods: We conducted a cross-sectional study from 1 January 2020 to 31 December 2022 in the Internal Medicine Department of Bouake University Hospital, involving 160 patients. Results: The prevalence of HCC was 3.6%, the mean age was 48.86 ± 14.5 years with extremes of 14 and 90 years and the sex ratio was 2.90. Viral hepatitis B was observed in 81% of patients, with HBs Ag positivity in 71.2%. The performance status of WHO was ≥ 2 in 93.2% of cases. HCC was discovered at advanced stage respectively in 51% for BCLC C and 47.8% for BCLC D stage. The nodules were multiple (89.3%), and superior to 3 cm. The hospital mortality was 20% and BCLC D stage of HCC was significantly associated with death (p = 0.04) in the univariate analysis. The BCLC D stage of HCC was significantly associated with death. Length of stay inferior to 5 days (OR = 0.77;CI 95: 0.61 - 0.96) and hepatic encephalopathy (OR = 1.39;CI 95: 1.10 - 1.77), were the two independent predictors of mortality. Conclusion: HCC mainly affected young men infected with chronic viral hepatitis B. Short length of stay and hepatic encephalopathy were independent predictors of mortality.

关键词： Liver Cancer Viral Hepatitis Death West Africa

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科特迪瓦阿比让55例结膜鳞状细胞癌结果分析（英文）

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国际眼科杂志 2017年第12期17卷 2187-2192页

作者： Rokia Coulibaly Berete Thierry Yves Constant Sowagnon Abokan Joel konan Sylvanius Beossin Koui Sandrine kouassi Kouakou Simon N'Dri Dede Adama Fanny 特雷什维尔教学医院眼科尤布贡教学医院眼科特雷什维尔教学医院病理科特雷什维尔教学医院影像科

目的:研究55例结膜鳞状细胞癌的流行病学、临床特点,以及艾滋病毒对其发病情况的影响。方法:横断面研究,纳入就诊于阿比让特雷什维尔大学医院眼科的54例55眼结膜鳞状细胞癌患者。收集的数据包括书面问卷、眼科检查、病理检查、HIV血清... 详细信息

目的:研究55例结膜鳞状细胞癌的流行病学、临床特点,以及艾滋病毒对其发病情况的影响。方法:横断面研究,纳入就诊于阿比让特雷什维尔大学医院眼科的54例55眼结膜鳞状细胞癌患者。收集的数据包括书面问卷、眼科检查、病理检查、HIV血清学检查、治疗情况(手术及化疗)、随访情况和预后。结果:患者年龄为7~75(平均42.28)岁。女性占53%。发病到就诊时间6~60(平均18)mo。患者平均随访29mo。共有53%(29眼)无视功能。54例患者中42例HIV阳性,28例为HIV1感染,4例为HIV2感染,10例为混合感染。这42例患者中28例进行了淋巴细胞分类检查,结果显示33%的患者CD4细胞计数500/m L。42眼(76%)为侵袭性分化型鳞状细胞癌,13眼(24%)为原位癌。40例(73%)局部肿瘤进行了肿块切除,其中6例进行了术后局部辅助化疗。社会经济情况分析显示39%的患者经济情况较差。结论:HIV感染是结膜鳞状细胞癌发病的危险因素,尤其是在撒哈拉以南的非洲。这一疾病不良预后可能与患者社会经济情况较差,我们治疗机构中医疗资源不足,抗肿瘤药物治疗经费较少有关,HIV感染也对疾病有一定影响。

关键词：上皮癌鳞状细胞获得性人免疫缺陷病毒

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Estimating Ecological Characteristics and Carbon Stock in Uneven-Aged Plantations of Acacia senegal L. in the Savannah Woodlands of Sudan

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Journal of Environmental Protection 2023年第5期14卷 404-418页

作者： Fatima Elhassan Awadalla Abass Safa Salaheldine Mubarak Khugali Nagla Abdelmounaim Mohammed Ahmed Ahmed Laamrani Elsadig Agabna Elhadi Ahmed Ali Hassabelkareem Siddig Edouard konan kouassi Department of Soil and Environmental Science Faculty of Agriculture University of Khartoum (UofK) Khartoum Sudan African Center of Excellence in Climate Change Biodiversity & Sustainable Agriculture (CEA-CCBAD) University Felix Houphou&eumlt-Boigny Abidjan C&ocircte d’Ivoire Centre for Remote Sensing Applications (CRSA) Mohammed VI University (UM6P) Ben Guerir Morocco Environmental and Natural Resources and Desertification Institute National Center for Research (NCR) Khartoum Sudan Institute of Environmental Studies University of Khartoum Khartoum Sudan Department of Forest Conservation and Protection Faculty of Forestry University of Khartoum (UofK) Khartoum Sudan

The aim of this study was to assess Acacia senegal trees’ characteristics as well as evaluate the carbon stock under a variety of ages in the El Demokeya forest in Sudan, where the Gum Arabic belt is located. 12 sample plots, in 2021 were randomly distributed to represent the entire area of the forest prior to the required measurements. The sample was designed as squire plots with one hectare. In each sample plot, all trees were counted, their height (m), and Diameters Breast Height (DBH in cm), respectively. The results showed the highest number of trees per ha at age 20 years old and the lowest number at age 47 years, while the highest values of DBH and volume were found at age 47 years old. As a result, the maximum and minimum values of the aboveground biomass were found in the age 47 years old and 16 years, accounting for 19.87 tons and 1.9 tons respectively. Thus, the amount of carbon stock was 11.92 tons/ha in the 35-years-old and 1.19 tons/ha in the 21-year stands. Furthermore, the average carbon stock in all plots was estimated as 18.70 tons/ha and hence the total carbon stock in the El Demokeya forest is equal to 620.11 tons. Conclusively, the characteristics of trees, amount of aboveground biomass and carbon stock in the El Demokeya forest varied among the uneven-aged plantation groups. The study recommends and encourages the protection of A. senegal in order to increase the carbon sink as well as protect the environment in the era of climatic changes.

关键词： Aboveground Biomass Soil Organic Carbon Dry Lands Forest Climate Change Mitigation Carbon

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Preliminary Study of Predation Effectiveness of the Assassin Bug Rhynocoris rapax Stal (Heteroptra: Reduviidae) on Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae), a Major Pest of Maize Crops

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Advances in Entomology 2023年第1期11卷 10-17页

作者： Assiénin Hauverset N’Guessan Brice Sidoine Essis Achi Laurent N’cho Hugues Annicet N’da Kouamé Jean-Noël konan N’Guessan Alphonse kouassi National Centre for Agronomy Research Research Station of La Mé Laboratory of Entomology Abidjan C&ocirc te d’Ivoire National Centre for Agronomy Research Food Crops Research Station Laboratory of Phytopathology Bouaké C&ocirc te d’Ivoire National Centre for Agronomy Research Research Station of Maize Millet and Sorghum Laboratory of Phytopathology Ferkessédougou C&ocirc te d’Ivoire National Centre for Agronomy Research Research Station of Maize Millet and Sorghum Plant Breeding Laboratory Ferkessédougou C&ocirc te d’Ivoire National Centre for Agronomy Research Research Station of La Mé Plant Breeding Laboratory Abidjan C&ocirc te d’Ivoire National Centre for Agronomy Research Research Station of La Mé Soil Science Laboratory Abidjan C&ocirc te d’Ivoire

Maize is a staple food in many sub-Saharan African countries, grown on large surfaces and with high production. However, maize’s cultivation is often confronted with attacks by the fall armyworm, which considerably reduces production. Thus, the use of biological agents in the control of the fall armyworm would contribute effectively to the sustainability of agriculture. It is in this context that this study, conducted at the La Mé station of the National Centre for Agronomy Research, aims to test the effectiveness of Rhynocoris rapax, a powerful predator of various insect families, on the fall armyworm Spodoptera frugiperda, for biological control of this maize pest in Côte d’Ivoire. Therefore, 3 batches of 1 adult individuals of Rhynocoris rapax were captured in trial plots set up at the La Mé station. These individuals were then put in contact with 3 batches of 5, 20 and 40 larvae of the pest in rearing boxes at an average temperature of 26.4°C and an average relative humidity of 60%, in order to evaluate the efficiency of the predation. The results showed that Rhynocoris rapax kills more larvae when these are in large numbers. The mortality of the high number of larvae was observed during the first three days, probably due to the voracity and aggressiveness of Rhynocoris rapax that period. So R. rapax is a potential predator of fall armyworm and should be protected.

关键词： Effectiveness Predation Rhynocoris rapax Spodoptera frugiperda Maize

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Craniofacial Horn Injuries: Rares Lesional Entities at the University Hospital of Bouaké(Côte d’Ivoire)

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Open Journal of Stomatology 2018年第7期8卷 250-257页

作者： Eric kouassi Zegbeh-N’Guessan Adoubs Célestin Benie Gohi Serge Irie Bi Rokiatou Kone-Kamate Serge Yao konan Grébéret Emmanuel Crezoit Department of Odontostomatology and Maxillofacial Surgery of the University Hospital of Bouaké C&ocirc te d’Ivoire Department of Pediatric Surgery CHU Bouaké C&ocirc te d’Ivoire Resuscitation and Anesthesiology Department of the University Hospital of Bouaké C&ocirc te d’Ivoire Department of Neurosurgery of the University Hospital of Bouaké C&ocirc te d’Ivoire

Aim: Describe the epidemiological, clinical and therapeutic particularities of craniofacial trauma by encornment. Type of study: This was a retrospective and descriptive study. Material and methods: It took place in the surgical emergency departments of Bouaké (Côte d’Ivoire) University Hospital from January 2013 to December 2017, for a period of 5 years. It focused on patients of 0 to 5 years old admitted for craniofacial trauma involving the horn of a bovine. Results: Of the 26 cases of traumatic encornment, 11 were craniofacial location (42%). There were 9 male and 2 female victims. The average age was 10.54 years with extremes of 6 months and 24 years. Patients came from rural areas of Côte d’Ivoire. Bovids were responsible for all causal encornements. The lesions involved the scalp (3 cases) and the face (8 cases). The lesions were cutaneous-musculo skeletal in 7 cases. The surgical treatment included debridement associated to a suture in all cases and associated with maxillo mandibular blockage in 3 cases and duro-cranioplasty in one case. Conclusion: In the local context, facial cranio traumatism by encornement is rare and seems to be essentially infantile, masculine and rural problem.

关键词： Cranio Facial Trauma Encornement Cow

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Profile of Patients with Breast Cancer Brain Metastasis in Abidjan

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Advances in Breast Cancer Research 2018年第2期7卷 201-210页

作者： Kouame konan Yvon kouassi Moctar Touré Evrard Narcisse Seka Oumou Kimso Mudasiru Akanji Oseni Bitti Adde Odo Arsène Gaetan Kagambega Innocent Adoubi Oncology Department of the Treichville University Hospital Department of Medicine and Medical Specialties Felix Houphou-et-Boigny University Abidjan Cote d'Ivoire

Patients with breast cancer will develop brain metastases in 15% - 25% of cases. Objective: To identify the profile of patients with breast cancer brain metastasis. Method: Retrospective study over 4 years in the oncology department of Treichville Hospital. All patients with breast carcinoma who had a brain metastasis during their cancer management were included. Results: 41 cases of breast carcinoma brain metastasis were collected. Patients were older than 40 years in 78% of cases. Family history of breast cancer was found in 7% of patients. More than 80% of patients had consulted with T3 and T4 tumor masses, with 100% of cases of node involvement. The brain was the second site of metastasis. The tumors were Triple negative in 48%, Her2 positive in 36% and luminal in 16%. Brain metastases were of late onset in the majority of cases (68%). They were clinically characterized by headaches (100%), most often included in an intracranial hypertension syndrome (52%). They were multiple (60%). Therapeutically, no surgery was performed on the metastases. Three patients received whole brain radiation therapy. All patients received systemic therapy. In terms of response, 30 cases of progression were observed after treatment and 2 cases of complete response were obtained. Survival from onset of brain metastasis was of 75% at 3 months and 2% at 12 months. Patients with longer survival rates were over 40 years old with triple negative breast cancer. Conclusion: Brain metastasis from breast cancer most often occurs in a particular clinical and pathological context in our countries.

关键词： Breast Cancer Brain Metastasis Abidjan

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