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Experimental Evaluating of the Physical, Mechanical and Durability Properties of Natural, Recycled and Both Combined Aggregates Based Concretes

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Materials Sciences and Applications 2023年第3期14卷 117-141页

作者： Etienne Malbila arba a.t. ouedraogo Nicolas Kagambega Gilbert G. Nana Sié Kam David Y. K. toguyeni Ecole Supérieure d’Ingénierie (ESI) Université de Fada N’Gourma (UFDG) Fada-N’Gourma Burkina Faso Laboratoire d’Energies thermiques Renouvelables (LEtRE) Université Joseph KI ZERBO Ouagadougou Burkina Faso Laboratoire de Géosciences et Environnement (LaGE) Université Joseph KI ZERBO Ouagadougou Burkina Faso Laboratoire de Physique et Chimie de l’Environnement (LPCE) Université Joseph KI ZERBO Ouagadougou Burkina Faso Ecole Polytechnique de Ouagadougou (EPO) Ouagadougou Burkina Faso

this experimental study aims at the reuse of recycled aggregates (RA), resulting from the demolition of concrete, cement block and cement mortar, in the manufa.t.re of common construction in Burkina Faso. the RA can readily replace natural aggregates in concrete. then five formulations of natural and recycled aggregates based concrete for chara.t.ristic strength of 25 Mpa were prepared in addition to the natural aggregates base concrete named reference concrete (BN): two types of recycled aggregates concrete (BR), three types of recycles and natural combined aggregates base concrete (BC). the properties of natural and recycled aggregates were chara.t.rized and the physical, mechanical strength and durability properties were also evaluated for all concrete specimens. All the studied concrete formulation present a density between 2000 kg/m3 ≤ ρ ≥ 2600 kg/m3 and an average slump of 4.9 ± 0.1 cm. the obtained results indicate that the recycled aggregates are suitable for current concrete. two out of the five combinations studied, such as the natural (BN) and combined aggregate (BC2) based concretes satisfy the mechanical chara.t.ristics (Rc28 > 25 MPa) at 28 days of age and an average absorption coefficient of 2.93% and 3.98%. the recycled aggregate based concrete (BR1, BR2) and combined aggregate based concrete (BC1), gave respective average compressive strength of 21.55 MPa, 20.50 MPa and 20.30 MPa, i.e. a difference of 13.80% to 18.80% under the chara.t.ristic strength (25 MPa) aimed at 28 days of age. thus, the recycled aggregates are in conformity with the normative prescriptions and their use for standard concrete gives adequate physical, mechanical and durability properties for the production of the C20/25 concrete series in the common civil engineering applications.

关键词： Concrete Demolition Wa.t. Aggregate Recycled Aggregate Strength Water Absorption

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Study of the behaviour of the dielectric consta.t.in Cu,Fe:BatiO_3

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第3期9卷 429-434页

作者： Alioune ouedraogo Kalifa PALM Issaka ouedraogo Guy CHANUSSOt Laboratory of Applied Organic Chemistry and Physics UFR/SEA University of Ouagadougou BP 7021 Ouagadougou Burkina Faso Laboratory of Dielectrics University of Dijon 21000 Dijon France)

In this work we study the behaviour of the dielectric consta.t.of BatiO3 single crystals doped with Cu and Fe for different ion percentages, pa.t.cularly, the influence of these hetemvalent substitutions on the ferroelectric-paraelectric phase transition whose temperature is found at tc=120℃ for pure samples. the dielectric consta.t.e in terms of temperature shows that the Curie temperature decreases when the qua.t.ty of impurities increases and presents a broadening and fla.t.ring of the maximum oft（t） within higher values, with the transition becoming more and more diffuse. It is interesting to have a material with very high permittivity （high-k） because of its capacity to store an importa.t.qua.t.ty of electric charges. the t anisotropy and the Curie-Weiss law are also verified with a good ratio between the slopes ofε^-l（t） from both sides of the transition, leading to a Curie consta.t. C= 13 × 10^4 K for BatiO3：1.6%Fe in the polar phase. BatiO3 is a displacive ferroelectric going through a first-order phase transition. the substitutions have an effect on the dynamics of the perovskite la.t.ce. they induce charges transfer to ti and a diminution of ela.t.c forces in BatiO3. then we discuss the transition but on the nature of the material. fa.t.that the maximum of permittivity does not depend on the phase

关键词： Phase transition Ferroelectric BatiO3 Remeika single crystals Dielectric constant Curie constant

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Identification of pests and assessment of their damage on Carapa procera and Lophira lanceolata in Burkina Faso,West Africa

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Journal of Forestry Research 2017年第3期28卷 585-591页

作者： Baslayi tindano Olivier Gnankine Amade ouedraogo Mamadou traore Jφrgen Axelsen Anne Mette Lykke Unite de Formation et de Recherche en Sciences de la vie et de la.t.rre Laboratoire d'Entomologie Fondamentale et AppliqueeUniversite de Ouagadougou03 BP 7021 OuagadougouBurkina Faso Unite de Formation et de Recherche en Sciences de la vie etde la.t.rre Laboratoire de Biologie et Ecologie VegetalesUniversite de Ouagadougou03 BP 7021 OuagadougouBurkina Faso INERA Institut de l'Environnement et de Recherches Agricoles01 BP 476 Ouagadougou 01Burkina Faso Depa.t.ent of Bioscience Aarhus UniversityAarhusDenmark

Nontimber forest products are a source of income for women in rural African communities. However, these products are frequently damaged by insect pests. the present study investigates the diversity and damage rates of insect pests that a.t.ck Carapa procera seeds and Lophira lanceolata fruits. the experiment was set up in western Burkina Faso and, for C. carapa, consisted of pests collected from seeds that had fallen to the ground and from stockpiled seeds. For L. lanceolata, pests were collected from fruits on the trees, and on the ground. the collected samples were sent to the laboratory to estimate the proportion of damaged seeds/fruits and rear the insects. the results showed that Ephestia spp., tribolium ca.t.neum, Oryzeaphilus spp., and tenebroides mauritanicus were the pests of Carapa procera seeds and Lophira lanceolata fruits. Ephestia spp. was recorded as the main pest of both C. proeera and L. lanceolata, whereas t. ca.t.neum was only detected from seeds of L. lanceolata. For C. procera, the stocks were the most infested （29 %） by Ephestia spp. the infestation rate of fruits of L. lanceolata by Ephestia spp, on trees （31.42 ± 3.75 %） was less than the rate of fruits by t. ca.t.neum on the ground （44.00 ± 3.5 %）. the different body sizes of Ephestia spp. may indicate the occurrence of two putative species, one from C. procera and another one from L. lanceolata. this work provides importa.t.information that could contribute to the setting up of a local-scale sustainable management framework for oil tree pests in Burkina Faso and surrounding countries.

关键词： Insect diversity Carapa procera Lophiralanceolata Ephestia spp. Pest management

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Maxillary Osteitis in the Yalgado ouedraogo teaching Hospital: Epidemiological, Clinical and therapeutic Aspects

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Open Journal of Stomatology 2018年第4期8卷 101-109页

作者： t. Konsem M. Millogo V. Ili A. Coulibaly R. W. L. ouedraogo L. ouedraogo D. ouedraogo CHU-YO Ouagadougou Burkina Faso CHU-SS Bobo-Dioulasso Burkina Faso

Purpose: Report the epidemiological, clinical and therapeutic aspects of maxillary osteitis. Material and Methods: this was a descriptive, cross-sectional retrospective study carried out in the Depa.t.ent of Stomatology and Maxillofacial Surgery of the Yalgado ouedraogo teaching Hospital, covering a period of 7 years. Results: We registered 68 cases of maxillary osteitis with an annual hospital frequency of 9.71 cases. the mean age was 27.5 years +/-4.02 with extremes of 4 years and 72 years. Farmers/herders were the most concerned in 67.65% of the cases. Reasons for consultation were dominated by swelling of the cheek in 79.41% of cases. the average time to consultation was 7 months. tooth decays and dental avulsions were mostly implicated in etiologies in 79.41% of the cases. treatment provided was medical and surgical. All patients received a.t.biotic therapy. Surgical treatment involved 51.47% of patients. the evolution was favorable in 89.70% of the patients. Sequelae were found in 58.82% of the patients. Conclusion: Maxillary osteitis is common in our regions. treatment is medical and surgical. It is marked by many difficulties, especially the delay in consultation.

关键词： Osteitis Maxillary Epidemiology Clinical therapeutic Ouagadougou

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Maxillary Amelobla.t.ma, Epidemiological Aspects and treatment at the Yalgado ouedraogo University Hospital (Burkina Faso)

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Open Journal of Stomatology 2018年第5期8卷 149-157页

作者： t. Konsem M. Millogo R. W. L. ouedraogo V. Ili L. ouedraogo A. Coulibaly D. ouedraogo HU-YO Ouagadougou Burkina Faso CHU-SS Bobo-Dioulasso Burkina Faso

Purpose: to report any epidemiological, anatomo-clinical and therapeutic aspects of maxillary amelobla.t.ma at the Yalgado ouedraogo University Hospital (CHU-YO). Materials and Method: this was a descriptive and retrospective study covering the period ranging from January 1, 2010 to December 31, 2016. All patients received in the stomatology depa.t.ent for maxillary amelobla.t.ma with histological confirmation were included in the study. Consultation registers were used as the basis for data collection. Results: In our study, 50 cases were reported, i.e. an incidence of 7.14 cases per year. the mean age was 30.16 years with a sex ratio of 0.56. Housewives were the most affected and the average time to consultation was 2.5 years. the site of the tumor was in the majority of cases the mandible 82%, with swelling as the main reason for consultation. X-rays showed a predominance of monogeodic images in 56% of the cases. Conservative surgery was performed in 56% of the cases. Conclusion: Amelobla.t.ma is common in our area, chara.t.rized by delayed consultation. Strengthening of the technical facilities and awareness campaigns for the populations for early consultation are required.

关键词： Amelobla.t.ma Maxillary Epidemiology treatment Ouagadougou

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Incisional Hernias: Risk Fa.t.rs and treatment in a Context of Limited Resources

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Surgical Science 2017年第10期8卷 451-456页

作者： Souleymane ouedraogo Salam ouedraogo Jean-Luc Kambire Mamadou Windsouri Mamadou t. traore Maurice Zida , Si Simon traore Depa.t.ent of Surgery University Ouaga 1 Pr Joseph Ki Zerbo Ouagadougou Burkina Faso Depa.t.ent of General and Digestive Surgery University Ouaga 1 Pr Joseph Ki Zerbo Ouagadougou Burkina Faso

Background: the purpose of this study was to describe the etiologic fa.t.rs and therapeutic modalities of incisional hernias in the depa.t.ent of surgery at the regional hospital of tenkodogo, in Burkina Faso. Methods: It is a cross sectional study covering the period from 2010 to 2012. Sampling was comprehensive, including all the patients operated for incisional hernias during this period. Results: Fifty-four patients were included. their average age was 22.3 years. there were 35 (64.8%) males and 19 (35.2%) female patients. We counted 28 large-size incisional hernias, 14 medium-size incisional hernias and 12 incisional hernias of small size. the average time from the first surgery to the diagnosis of incisional hernias was 8 months. Generalized acute peritonitis (44.4%) and acute intestinal obstructions (22.2%) were the main indications of initial surgical interventions. Vertical midline incisions have been involved in 37 cases (68.5%). therapeutically, two surgical techniques have been used: open suture repair and open mesh repair. Forty-two patients (77.8%) were treated by open suture repair. twelve patients (22.2%) benefited from open mesh repair. Post-operative complications were noted in 2 patients. Nine patients (16.7%) presented a recurrence a.t.r 12 months. Conclusion: In the rural area of Burkina Faso, incisional hernias occur in young patients. Emergencies with abdominal Infections are the main operative indications. Prostheses are relatively high cost and less accessible. the recidivism rate is high.

关键词： Incisional Hernia Abdominal Wall Closure Surgical treatment Burkina Faso

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Phytochemical Screening by High-Performance thin-Layer Chromatography, a.t.oxida.t.a.t.vities and Acute toxicity of trunk Barks Extra.t. of Lannea velutina A. Rich

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American Journal of Analytical Chemistry 2022年第10期13卷 365-381页

作者： Boukaré Kaboré Moumouni Koala Mathieu Nitiema Windingoudi Rimwagna Christian ouedraogo Souleymane Compaoré Lazare Belemnaba Salfo ouedraogo Sylvain Ilboudo Noufou ouedraogo Consta.t.n M. Dabiré Félix B. Kini Sylvin ouedraogo Eloi Palé Laboratoire de Chimie Organique et de Physique Appliquée (LCOPA) école Doctorale Sciences et Technologie UniversitéJoseph KI-ZERBO Ouagadougou Burkina Faso Dépa.t.ment Médecine-Pharmacopée traditionnelles/Pharmacie (MEPHAtRA/Ph) Institut de Recherche en Sciences de la Santé (IRSS/CNRST) Ouagadougou Burkina Faso International ResearchLoboratory-Environnement Santé Sociétés (IRL 3189 ESS) CNRST/CNRS/UCAD/UGB/USTTB Burkina Faso Laboratoire de Chimie et énergies Renouvelables Université Nazi BONI Bobo Burkina Faso

Lannea velutina is a.t.aditional herbal remedy used to treat various diseases, including hypertension (HBP). Herbal medicines are affordable, and some have minimal side effects;they are rich in bioa.t.ve components that encourage prevention and treatment. this work uses appropriate experimental paradigms to investigate the phytochemical composition, a.t.oxida.t.a.t.vity, and acute oral toxicity of L. velutina.t.unk bark extra.t.d in water, methanol, ethyl acetate, dichloromethane, and hexane. According to a high-performance thin-layer chromatography profile, this shrub’s bark contains sterols, saponosides, flavonoids, and tannins. Compared to ethyl acetate and aqueous extra.t., the methanol extra.t.had the highest total phenolic (607.06 ± 0.6 mg GAE/g DW), flavonoid (20.97 ± 0.23 mg QE/g DW), and condensed tannins (194.50 ± 0.75 CE/g DW) content. the methanol extra.t.displayed the highest a.t.oxida.t.a.t.vity using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capability assay (IC50 = 8.59 g/mL;AAI = 4.66) compared to the other extra.t.. It exhibited a.t.radical a.t.on comparable to that of trolox (IC50 = 15.16 g/mL), ascorbic acid (IC50 = 11.94 g/mL), and catechin (IC50 = 11.64 g/mL). the connection between flavonoid concentration and hydrophilic a.t.oxida.t.a.t.vity was robust (r = 0.997). Mice were used to evaluate the acute oral toxicity of ethyl acetate, methanol, and aqueous extra.t. using guidelines 425 of the Organization for Economic Cooperation and Development. All tested extra.t. have an estimated LD50 greater than 2000 mg/kg body weight. the truncal bark of L. velutina could be an a.t.rnative source for HtA management.

关键词： Lannea velutina Phytochemicals Proa.t.ocyanidins a.t.oxida.t. LD50

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Acute toxicity and a.t.elmintic Effects of Gomphrena serrata L. (Amara.t.aceae) Extra.t. on Adult Worms and Eggs of Haemonchus contortus

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Pharmacology & Pharmacy 2024年第5期15卷 207-221页

作者： Hippolyte ouedraogo Mohamed Bonewendé Belemlilga Aristide traore Gilchrist Abdoul Laurent Boly Félicité Moyenga Gueswindé Geoffroy ouedraogo Sylvain Ilboudo Lazare Belemnaba Sylvin ouedraogo Laboratoire de Recherche-Dé veloppement de Phytom&#233dicaments et M&#233dicaments (LR-D/PM) Institut de Recherche en Sciences de la Sant&#233 (IRSS) Centre National de la Recherche Scientifique et Technologique (CNRST) Ouagadougou Burkina Faso Laboratoire de Dé veloppement du M&#233dicament (LADME) Centre de Formation deRecherche et d&#8217Expertises en Sciences du M&#233dicament (CEA-CFOREM) &#201cole Doctorale Sciences de la Sant&#233 (ED2S) Universit&#233 Joseph KI-ZERBO Ouagadougou Burkina Faso International Research Laboratory-Environnement Sant&#233 Soci&#233t&#233s (IRL 3189 ESS) CNRS/CNRST/UCAD/UGB/USTTB Ouagadougou Burkina Faso

Gomphrena serrata L. (Amara.t.aceae) is a medicinal pla.t.widely used traditionally in rural areas to treat many diseases, including ga.t.ointestinal helminthiasis of small rumina.t.. this work aims to estimate the pla.t.extra.t. phytochemical potential and study the a.t.vities of the aqueous decoction (GS_AD), aqueous macerate (GS_AM), and hydroalcoholic macerate (GS_HEM) of Gomphrena serrata extra.t. on two developmental stages (eggs and adult worms) of Haemonchus contortus. Phytochemical screening was carried out. the acute toxicity test was performed according to the Organisation for Economic Co-operation and Development (OECD) test guideline 423. the Haemonchus contortus eggs hatching inhibition test was performed left to incubate for 48 hours in the presence of the different pla.t.extra.t. at increasing concentrations of 0.125;0.25;0.5;0.625;1;2;3 mg/mL. For the motility inhibition test on adult worms, the worms were conta.t.d with the extra.t. at concentrations of 0.75;1;1.25;1.5;2;3;4 mg/mL and left to incubate for 24 hours. Albendazole and levamisole were used as standard. Phytochemical screening revealed the presence of tannins, saponins, reducing compounds, coumarins and derivatives, a.t.ocyanins, steroids, triterpenes, and flavonoids. An acute toxicity study showed that the oral LD50 value of G. serrata was estimated to be 5000 mg/kg. All extra.t. showed an effect on both stages of parasite development. the hatching inhibition rate was 100% from 3 mg/mL for all three extra.t.. the rate of inhibition of motility was 100% from 4 mg/mL for each extra.t. HEM is more efficient on eggs and Haemonchus contortus adult worms than other extra.t. with IC50 of 0.457 mg/mL and LC50 of 1.329 mg/mL, respectively. these results suggest that Gomphrena serrata, a pla.t.used by farmers, has a.t.elmintic properties.

关键词： Gomphrena serrata Haemonchus contortus a.t.elmintic In Vitro

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HPtLC Phytochemical Screening and Hydrophilic a.t.oxida.t.a.t.vities of Apium graveolensL., Cleome gynandraL., and Hibiscus sabdariffaL. Used for Diabetes Management

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American Journal of Analytical Chemistry 2021年第1期12卷 15-28页

作者： Moumouni Koala Alphonsine Ramde-tiendrebeogo Noufou ouedraogo Sylvain Ilboudo Boukaré Kaboré Félix B. Kini Sylvin ouedraogo Institut de Recherche en Sciences de la Sa.t. Centre National de la Recherche Scientifique et Technologique (IRSS/CNRST) Ouagadougou Burkina Faso Laboratoire de Chimie Organique et Physique Appliquées (L.C.O.P.A.) Université Joseph KI-ZERBO UFR/SEA Département de Chimie Ouagadougou Burkina Faso Unité Mixte Internationale Environnement-Santé-Société (UMI 3189 ESS) CNRST/CNRS/UCAD/UGB/USTTB-P&ocirc le Burkina Ouagadougou Burkina Faso

Diabetes mellitus is a socially significa.t.disease chara.t.rized by chronic hyperglycemia and metabolic disorders of proteins, carbohydrates, and lipids due to reduced function of insulin. Medicinal pla.t., rich in bioa.t.ve components that promote prevention and treatment, are inexpensive and no side effects. Apium graveolens, Cleome gynandra, and Hibiscus sabdariffa from Burkina Faso were investigated for their phytochemical profile and a.t.oxida.t.a.t.vities. the high-performance thin-layer chromatography profile revealed flavonoids, tannins, and sterols in these herbaceous. the Hibiscus sabdariffa methanolic extra.t.exhibited the highest total phenolic (138.4 ± 0.5 mg GAE/g DW) and flavonoid (52.8 ± 0.6 mg RuE/g DW) contents comparatively to Cleome gynandra and Apium graveolens. Hibiscus sabdariffa methanolic extra.t.also presented the highest a.t.oxida.t.a.t.vity (IC50 = 0.31 ± 0.002 mg/mL) using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity assay. A high correlation between flavonoid contents and hydrophilic a.t.oxida.t.a.t.vities (r = 0.99) was observed, indicating that flavonoids contribute significatively to these herbaceous a.t.oxida.t.properties. Apium graveolens, Cleome gynandra, and Hibiscus sabdariffa constitute a natural source of phenolic compounds that could be exploited in diabetes mellitus management.

关键词： Diabetes Mellitus Medicinal Pla.t. Flavonoids Contents Hydrophilic a.t.oxida.t.a.t.vity HPtLC Screening

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A Review on Bioa.t.ve Compounds Isolated from Euphorbia hirta L.

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American Journal of Pla.t.Sciences 2023年第6期14卷 710-726页

作者： Roland Nâg-tiéro Meda Sami Eric Kam Windmi Kagambega Eliasse Zongo Clarisse ouedraogo Abdoulaye Segda Benjamin Kouliga Koama Franck téounviel Somda Emmanuel Zongo Georges Anicet ouedraogo Laboratoire de Recherche et d’Enseignement en Sa.t. et Biotechnologies Animales Université Nazi BONI Bobo-Dioulasso Burkina Faso Laboratoire de Recherche en Biochimie INSP/Centre MURAZ Bobo-Dioulasso Burkina Faso Laboratoire de Médicine et Pharmacopée traditionnelle Institut de Recherche en Sciences de la Santé Direction Régionale de Bobo-Dioulasso Bobo-Dioulasso Burkina Faso Laboratoire de Biochimie Centre Hospitalier Universitaire Sourou SANOU Bobo-Dioulasso Burkina Faso

Euphorbia hirta L. is an annual medicinal herb throughout many tropical continents used to cure various diseases. Several studies have isolated many bioa.t.ve compounds from E. hirta. this study aimed at providing a collection of bioa.t.ve constituents in E. hirta. this review summarizes the extra.t.on solvent, the structures and the properties of 38 bioa.t.ve phytochemicals isolated from E. hirta. It could help to understand the relationship existing between phytochemicals and their a.t.vities.

关键词： Euphorbia hirta Phytoconstituents Biological a.t.vities Structures

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