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Morphology, Thermal Behavior and Dynamic Rheological Properties of Wood Polypropylene Composites

Materials Sciences and Applications 2013年第11期4卷 730-738页

作者： Diène ndiaye Vincent Verney Haroutioun Askanian Sophie Commereuc Adams tidjani Département de Physique Université Cheikh Anta Diop Dakar Sénégal Institut de Chimie de Clermont-Ferrand Université Blaise Pascal Clermont-Ferrand France CnRS UMR 6296 ICCF Université Blaise Pascal Aubière France Institut de Chimie de Clermont-Ferrand Université Blaise Pascal Clermont-Ferrand France ecole nationale Supérieure de Chimie de Clermont-Ferrand Université Blaise Pascal Clermont-Ferrand France Section Physique Appliquée Université Gaston Berger Saint-Louis Sénégal Institut de Chimie de Clermont-Ferrand Université Blaise Pascal Clermont-Ferrand France ecole nationale Supérieure de Chimie de Clermont-Ferrand Université Blaise Pascal Clermont-Ferrand France

Wood polymer composites (WPCs) were made with pine and polypropylene matrix (PP). The composites were produced by melt blending in a Brabender at 180°C. Characterization of the samples, with the aid of scanning electron microscopy supplemented by microscope photography, showed an improved dispersion of wood in the polymeric material in presence of polypropylene grafted with maleic anhydride (MAPP) or nanoclay. The use of the MAPP instead of clay seems to have enhanced the level of crystallinity in the composites for the same levels of wood loading and also accelerates the crystallization. Melt rheological measurements of neat PP and PP-wood composites were carried out at 180°C with an AReS Rheometer scientific mechanical spectrometer in oscillatory frequency. All the composites materials exhibit viscoelastic values greater than those for neat PP. The samples containing MAPP as comptabilizer show the higher newtonian viscosity, however, the addition of a small concentration of nanoparticles like nanoclays does not improve the resulting melt viscoelastic behavior of the composite.

关键词： Morphology Thermal Behavior Dynamic Rheological Properties Wood Polypropylene Composites

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Impacts of Market Gardening Practices on environmental Resources: The Case of Irrigable Lands in Bonkoukou (Imanan Rural Municipality, SW niger Republic)

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natural Resources 2022年第1期13卷 16-37页

作者： Karimou Dia Hantchi salamatou Abdourahamane Illiassou Adamou Didier tidjani Rachid Boubacar Oumarou Zibo Garba Department of Geology Faculty of Science and Techniques Dan Dicko Dankoulodo University Maradi Niger Department of Animal Production Faculty of Agronomic Science University of Diffa Diffa Niger Department of Soil Science Faculty of Agronomy Abdou Moumouni University Niamey Niger Department of Digitization of environmental Science Faculty of Science and Techniques University of Dosso Dosso Niger

Due to increasingly extreme climatic conditions in the Sahel, irrigated crops are emerging as imperative innovations for agricultural transformation and resilience. This study is designed to assess the impact of market gardening on soil, water and plant cover in the western niger Republic. Semi-structured survey data were collected from 78 site operators in the Imanan rural municipality (Filingué, Tillabéry). In addition to the survey, a photographic collection illustrated certain observable facts in the field. The survey shows that the wooden enclosures (70.65% of respondents) around the fields are renewed every year. The impacts are then substantial: deforestation of plateaus, clearing of valleys for new extensions, loss of wildlife habitat, changes in the water flow regime resulting from a geomorphological change in the commune. Itou, the preparation of the planks consumes a lot of water. Thus, the new sinking of water points and the load pressure increase the drawdowns of wells and boreholes in the sites (75.46% of respondents). The frequent spills of waste oil on the sites, as well as the numerous potato storage pits, are among the factors and vectors most likely to contaminate the soils and aquifers of the study area. Market gardening destabilizes the soils and induces regressive erosion as well as area runoff of rainwater on all sites and on the slopes. On the other hand, slash-and-burn practices, drying of branches intended for fences, as well as rain-fed cowpea crops, promote improved physical properties and soil fertilization. To reduce the risks of disintegration and especially of silting up of sites, the study suggests a policy of live hedges and wire fences so that common spaces can be imposed on operators.

关键词： Market Gardening Impacts environmental Resources Degradation Imanan niger

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Resistance to Beta Lactam Antibiotics of <i>Pseudomonas aeruginosa</i>Isolated in Community Infections within HIV Infected Persons in Lomé-Togo

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World Journal of AIDS 2014年第1期4卷 81-84页

作者： Majesté Ihou Wateba Kanyni ekoue-Kouvahey Abago Balaka Komivi Tsatsu Ousseni tidjani Department of Infectious Diseases and Pneumology CHU Sylvanus Olympio Lomé Togo Department of Internal Medicine CHU Sylvanus Olympio Lomé Togo Medical Center of nGO VISA Lomé Togo

Objective: Describe resistance to beta lactam antibiotics of Pseudomonas aeruginosa in community infection within HIV-1 infected persons. Methods: We have studied prospectively from June 15th to December 31st 2013 inthe Clinic Hotel-Dieu and nGO VISA of Lomé, adult HIV-1 infected patients under anti retroviral therapy combining tenofovir, lamivudine and efavirenz for at least one year. The technique of agar diffusion susceptibility using discs of Ticarcillin + clavulanic acid is used to study the β-lactamase production. The diagnosis of species was performed by the chloroform test and the test for sensitivity to kanamycin and colistin. Results: Thirty five strains of Pseudomonas aeruginosa were obtained. The T-lymphocytes CD4 mediane was 575 cells/mm3 of blood. Urine represented 15 cases, skin abscesses 11 cases, externa suppurate otitis 7 cases and vaginal swab for 2 cases. The phenotypes were: wild phenotypes 23 cases (65.7%), resistant phenotypes 12 cases. Among resistant phenotypes, 4 were complex phenotype;5 were eSBL phenotypes;2 were hyper productive cephalosporinases phenotypes and 1 was a specific phenotype with impermeability to imipenem. Conclusion: The acquisition of resistance of Pseudomonas aeruginosa to beta lactam antibiotics in community infections among HIV-1 infected person incentives controls and promotes the rational use of antibiotics.

关键词： HIV-1 Pseudomonas aeruginosa Resistance Phenotypes Beta Lactam Antibiotic

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Viral Characteristic of HIV Infected Patients naïf of Anti-Retroviral Therapy with CD4+ T Lymphocytes Rate Greater than 350 per Microliter of Blood in LoméTogo

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World Journal of AIDS 2013年第4期3卷 364-366页

作者： Ihou nazoba Majesté Wateba Akouda Akessiwe Patassi Abago Balaka Ousséni tidjani Service de Maladies Infectieuses et de Pneumologie CHU Sylvanus Olympio Lomé Togo

Objective: To evaluate the virological status of ineligible HIV patients for anti-retroviral therapy based on the criterion of CD4+ T lymphocytes rate over than 350/μl of blood. Method: This is a prospective study which was conducted from november 2011 to July 2012 in the tropical and infectious disease department of CHU Sylvanus Olympio of Lomé. All HIV-1 infected patients whose CD4+ T lymphocytes rate was ≥350/μl of blood were retained. The count of CD4+ T lymphocytes was made by cytometer FACSCalibur? flow of BD biosciences and the determination of viral load was achieved by nASBA laboratory method of Biomérieux. Results: We have recruited 102 PLWHA aged between 19 and 58 years with a median of 35 years. Biologically, 102 patients had a T-CD4 rate between 355 and 432/μl of blood. The determination of viral load showed a very high viral replication more than 10,000 copies/ml among all patients and 28 (27.5%) patients had a viral load > 100,000 copies/ml of blood. Conclusion: Our results argue for a reconsideration of the criteria for starting antiretroviral therapy in Togo by including virological data if necessary in patients with T-CD4 rate below 500/μl of blood.

关键词： Viral Load CD4+ T Lymphocytes naive Anti-Retroviral Therapy Patients

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影响水提取花生固形物的主要因素研究

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饮料工业 2005年第1期8卷 32-36页

作者： AMZA tidjani 张国农江南大学食品学院江苏无锡214036

研究了烘烤对于花生蛋白溶解性、浸泡(时间、效率)以及不同水/固形物(花生)比对总可提取固形物的影响。当烘烤温度为90～120℃,烘烤10min时,蛋白溶出率最高。最佳的浸泡时间和固形物(花生)/水比分别为6h,1∶2。对于总可提取固形... 详细信息

研究了烘烤对于花生蛋白溶解性、浸泡(时间、效率)以及不同水/固形物(花生)比对总可提取固形物的影响。当烘烤温度为90～120℃,烘烤10min时,蛋白溶出率最高。最佳的浸泡时间和固形物(花生)/水比分别为6h,1∶2。对于总可提取固形物而言,以其组成和粘度(2.1cps)为基准,花生/水比为1∶8时最好。

关键词：烘烤蛋白质溶解性浸泡固液比

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Ipsilateral proximal and shaft femoral fractures

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Chinese Journal of Traumatology 2017年第3期20卷 155-157页

作者： eric Lawson Soumaila Madougou Pascal Chigblo Gildas Quenum Abdourahmane Ouangre Fiacre tidjani Oswald Goukodadja Aristote Hans-Moevi Akue Department of Orthopaedic and Traumatology Surgery Cotonou Teaching Hospital Jericho Cotonou Benin

Purpose： To study the management and evaluate anatomical and functional outcomes of patients with ipsilateral proximal and shaft femoral fractures. Methods： A retrospective, descriptive and analytic study lasted for ten years and a half ranging from January 1, 2005 to June 30, 2015. The following parameters were studied： epidemiology, fracture char- acteristics, therapeutic, anatomical and functional outcomes. The correlation between different param- eters was analyzed with Fischer test. The significant threshold was defined for p value 〈0.05. Results： Ten medical files were registered. There were 7 men and 3 women, with a sex ratio of 2.33. The average age was 46 years （range： 29-62 years）. It was about traffic road accidents in all cases. Motorcycle -motorcycle and motorcycle-car collision were most frequent. Average admission delay was 7 h （range： 1.5-24 h）. Left side was most reached in 8 cases. According to Garden classification, there was type Ⅲ cervical fracture in 2 cases, type Ⅱ in 1 case and type Ⅳ in 1 case. According to ender classification, there was type I trochanteric fracture in 3 cases, type Ⅵ in 2 cases and type Ⅶ in 1 case. According to AO classification, there was type A shaft fracture in 6 cases （A2 in 4 cases and A3 in 2 cases）, type B in 2 cases （BI in 1 case and B2 in 1 case） and type C in 2 cases （CI in 1 case and C2 in 1 case）. Average surgical delay was 28.7 days （range： 11-61 days）. For proximal femoral fracture, Moore prosthesis was used in 1 case, blade plate 130° in 2 cases, long Gamma nail in 4 cases, double screwing in 2 cases and dynamic hip screw in 1 case. For shaft femoral fracture, blade plate 95° was used in 3 cases, low compressive plate in 2 cases. Osseous contention was achieved in 4 cases with long Gamma nail and in 1 case with long blade plate 130°. nonunion of cervical fracture was achieved in 2 cases. The average osseous healing delay was 5.14 months （range： 3-12 months） for proximal femoral fracture and 5 months （range：

关键词： Femoral fractures Proximal fractures Shaft fractures

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HIV-1 Viral Load and CD4 Assessment in HIV-1 Infected Pregnant Women Supported as Part of PMTCT in n’Djamena, Chad

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World Journal of AIDS 2015年第3期5卷 238-244页

作者： Adoum Fouda abderrazzack Mounerou Salou Yaovi Ameyapoh Mahamat nour Aguid Bertin Tchombou Hig-Zounet Adawaye Chatte abdelsalam tidjani Service de Laboratoire et Médicaments du Programme Sectoriel de Lutte Contre le sida et les Infections Sexuellement Transmissibles N’djamena Tchad Laboratoire de Microbiologie du CHU Sylvanus OLIMPYO Département des Sciences Fondamentales Faculté des Sciences de la Santé Université de Lomé Lomé Togo Laboratoire de Microbiologie et de Contrô le de Qualité de Denrées Alimentaires Ecole Supérieure des Techniques Biologiques et Alimentaires Université de Lomé Lomé Togo Laboratoire de Biologie Moléculaire et D’immunologie FSS/UL Lomé Togo Service de Prise en Charge des Personnes Vivant avec le VIH/Sida Centre de l’Appui Psycho Médicosocial N’djamena Tchad Service de Prise en Charge des Personnes Vivant avec le VIH/Sida H&ocirc pital Général de Référence national N’djamena Tchad Département des Sciences Biomédicales et Pharmaceutiques Institut Universitaire des Sciences et Techniques d’Abéché Tchad Faculté des Sciences de la Santé Université de N’djamena N’djamena Tchad

In Sub-Saharan Africa, HIV affects lots of women of childbearing age;without prevention they can transmit the virus to their child. A cross-sectional study was conducted in the center of Psycho Medico-Social Support (APMS) in n’Djamena, Chad from January 2014 to March 2015. Our sampling concerned HIV-1 infected pregnant women followed up for PMTCT and their newborn. CD4+ lymphocytes and HIV-1 viral load were tested respectively with PIMATM and Abbott m2000 Real Time in mothers. early infant diagnosis of HIV-1 was done in Children using PCR tool (Abbott m2000 Real Time). Pregnant women included in the study had a median age of 25 years (IQR, 22 - 30 years). Most of them (75.6%) (34/45), were under combination ART (TDF + 3TC or FTC + eFV). The median duration on ART was 4 month (IQR [3 - 5 months]). nevirapine syrup was administrated to newborns as prophylaxis at least for the first six weeks of life until eID was done. At ART initiation, mothers’ LTCD4+ median was 249 cells/mm3 (IQR: 95 - 674 cells/mm3). After a median duration of 4 months on ART, LTCD4+ median was 530 cells/mm3 (IQR [263 - 1220 cells/mm3]). Viral load assessment in mothers showed that 15.5% (7/45) were undetectable, 75.6% (34/45) were detectable with a VL es/ml and 8.8% (4/45) at virologic failure (VL > 3log copies/ ml). Four (11.4%) of 35 children included were tested positive at eID for HIV-1. Antiretroviral treatment management in pregnant women can improve their health and reduce the risk of MTCT. Availability of virologic monitoring in routine is essential for pregnant women in resources limited setting for preventing HIV transmission to their new-born and keep them alive.

关键词： Pregnant Woman Child HIV ART LTCD4 Viral Load PCR

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Pulmonary embolism in Young Patients: About 24 Cases at the Cardiology Department of Dakar Principal Hospital in Senegal

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World Journal of Cardiovascular Diseases 2019年第9期9卷 632-638页

作者： Joseph Salvador Mingou Amadou tidjani Saadou Madjiguene Ka Zoumana Sangaré Serigne Cheikh Tidiane ndao Khadidiatou Dia Mouhamed Cherif Mboup Pape Diadié Fall Department of Cardiology Hospital Principal Dakar Senegal Departement of Cardiology Hospital Aristide Le Dantec Dakar Senegal

Introduction: Pulmonary embolism is a relatively common life-threatening cardiovascular emergency. It remains a diagnostic problem because of its nonspecific clinical signs. Objective: The general objective was to study pulmonary embolism in young patients admitted to the cardiology department of Dakar Principal Hospital in Senegal. Methodology: This was a retrospective, descriptive and analytical study in the cardiology department of the Dakar Principal Hospital over a period of two (02) years from January 1, 2015 to December 31, 2016 in young patients admitted for pulmonary embolism. Results: We collected 24 patients with a hospital prevalence of 2.18%. The average age was 42.29 years ± 8.41 years with a male predominance (sex ratio of 1.6). The Wells probability score was low in 54.16% of patients and medium in 45.83%. Functional signs were dominated by chest pain (83.33% of cases) followed by dyspnea (79.16% of cases). The thromboembolic risk factors found were gynecological-obstetrical in 16.6% of cases followed by prolonged bed rest. One case of thrombophilia was present with a deficiency of protein C and antithrombin III. The electrocardiogram recorded sinus tachycardia in 29.16% of patients;the Mac Ginn White sign (S1Q3T3) was found in 25% of cases. echocardiography showed pulmonary arterial hypertension in 12.48% of cases, dilation of the right ventricle and a paradoxical septal motion in 14.28% of cases. CT pulmonary angiography showed 63.63% of cases with bilateral pulmonary embolism;it was unilateral in 22.72% of cases. Long-term anticoagulation was based on acenocoumarol 4 mg (66.7%) and Rivaroxaban (33.3%). 62.5% of the patients were seen at the 3rd month, when a checking was made to evaluate the tolerance of the treatment, and the evolution of the patient. Conclusion: Pulmonary embolism is not a rare condition in young subjects but is often underdiagnosed. Gyneco-obstetrical factors are predominant in this age group. Direct oral anticoagulants are mor

关键词： Pulmonary embolism Young Patients Dakar (Senegal)

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研究^(222)Rn在地下迁移模拟装置的建成

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世界核地质科学 1989年第2期18卷 73-75页

作者： A.tidjani J.L.Seidel M.Monnin D.B.Isabelle 王庆国

为了在控制条件下研究^(222)Rn气体在地下的运动,已经建成了一个模拟装置。该装置的设计可单独的改变不同的地球物理参数,如压力、温度、湿度、土壤的类型及其颗粒度等。本文中所描述的首次测试结果证实了该模拟装置的有用性。

关键词：模拟装置 Rn 物理参数颗粒度径迹密度火花计数器计数率大气参数大后偏置电压

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