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Influence of Microwave Power and Heating Time on the Drying Kinetics and Mechanical Properties of Eucalyptus gomphocephala Wood

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Frontiers in Heat and Mass Transfer 2025年第1期23卷 345-360页

作者： Mariam Habouria Sahbi Ouertani Noura Ben Mansour Soufien Azzouz Mohamed Taher Elaieb laboratoire d’Energétique et des Transferts Thermiques et Massiques Physics DepartmentFaculty of Science of TunisUniversity of Tunis El ManarCampus UniversitaireEl Manar2092Tunisia Physics department Faculty of ScienceAl-Baha UniversityAlaqiq65779Saudi Arabia laboratoire de gestion et de Valorisation des Ressources Forestières INRGREFUniversity of CarthageCity of Hédi EL Karray El Menzah IVAriana2080Tunisia

The aim of this paper was to characterize through experiment the moisture and temperature kinetic behavior of Eucalyptus gomphocephala wood samples using microwave heating(MWH)in two scenarios:intermittently and *** mechanical properties and surface appearance of the heated samples were also *** and intermittent microwave drying kinetic experiments were conducted at a frequency of 2.45 gHz using a microwave laboratory oven at 300,500,and 1000 *** rate curves indicated three distinct phases of *** the microwave power with a shorter drying time led to rapid increases in internal temperature and water evaporation rates of the heated *** results indicated that samples heated under continuous MW(Microwave)power at 300 watts had a modulus of rupture(MOR)and modulus of elasticity(MOE)in three static bending tests higher than 29%and 36%,respectively,than samples heated at 1000 *** microwave heating(IMWH)of samples at 300 and 1000 watts produced the highest MOR and MOE values of 31%and 51%,respectively,unlike those heated under continuous microwave heating(CMWH).External qualitative observation showed that samples heated at high microwave power had severe surface *** defects were missing when using *** analysis of variance(ANOVA)showed that mechanical properties were linked to both microwave power level and the heating scenario,except for MOR in axial compression under CMWH.

关键词： Microwave heating internal heat generation drying kinetics heat and mass transfer evaporation rate moisture content temperature mechanical properties Eucalyptus gomphocephala

Insight into physical properties of lutetium-based double half-Heusler alloys LuXCo_(2)Bi_(2)(X=V,Nb and Ta)

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Journal of Rare Earths 2025年第1期43卷 199-208,I0008页

作者： Saber Saad Essaoud Said Al Azar Ahmad A.Mousa Anas Y.Al-Reyahi Nabil Al Aqtash Mohammed Elamin Ketfi department of Physics Faculty of ScienceUniversity of M'sila28000M'silaAlgeria laboratoire de Physique des Particules et Physique Statistique Ecole Normale Superieure-KoubaBP 92Vieux-Kouba16050AlgiersAlgeria department of Physics Faculty of ScienceZarqa UniversityZarqa13132Jordan department of Basic sciences Middle East UniversityAmman183Jordan Applied science Research Center Applied Science Private UniversityAmman11937Jordan department of Physics Faculty of ScienceThe Hashemite UniversityP.0.Box 330127Zarqa13133Jordan department of Electronics Faculty of TechnologyUniversity of M'sila28000M'silaAlgeria

Based on the density functional theory,the double half-Heusler alloys LuXCo_(2)Bi_(2)(X=V,Nb,and Ta)were studied to predict their structural,thermodynamic,thermoelectric,and optical *** the considered alloys are thermodynamically stable and have semiconductor behavior with indirect band gaps of 0.62,0.75,and 0.8 eV for LuVCo_(2)Bi_(2),LuNbCo_(2)Bi_(2),and LuTaCu_(2)Bi_(2),*** investigated compounds exhibit semiconducting behavior with energy gaps below 0.8 *** impact of heat and pressure on thermodynamic coefficients was evaluated,and the influence of charge carriers on the temperature-dependent properties was studied using the semi-classical Boltzmann *** studied compounds were characterized by their low lattice thermal conductivity at room temperature and low thermal expansion *** alloys exhibit substantial absorption coefficients in the ultraviolet(UV)light region,high optical conductivity,and high reflectivity in the visible light region,making them highly appealing materials for applications in the energy and electronics sectors.

关键词： Double half-Heusler Abinitio calculation Optical coefficients Thermoelectricity Lattice thermal conductivity Rareearths

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NH_3 Plasma Surface Treatments of Engineering Fluoropolymers: A Way to Enhance Adhesion of Ni or Cu Thin Films deposited by Electroless Plating

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材料热处理学报 2004年第05B期25卷 1092-1097页

作者： Maurice Romand Marlene Charbonnier Yves goepfert laboratoire de sciences et Ingenierie des surfaces and Laboratoire de Sciences et Ingenierie des Surfaces andUMR 5180 des Sciences Analytiques Universite Claude Bernard - Lyon 1 69622 Villeurbanne Cedex France

This paper describes the electroless Ni or Cu plating of some fiuoropolymer substrates through a tin-free activation process. Materials subjected to surface metallization are commercial Teflon() FEP, Nafion(), ACLAR() and LaRCTM-CP1 thin films which have recently gained a large scientific and technological interest due to their excellent thermal, chemical, mechanical and dielectric properties. The original approach implemented in the present work involves: (i)the grafting of nitrogen-containing functionalities on the polymer surfaces through plasma treatments in ammonia, (ii) the direct catalysis of the so-modified surfaces via their immersion in a simple acidic PdCl2 solution (i.e. without using a prior surface sensitization in an acidic SnCl2 solution), and finally (iii) the electroless metallization itself. However, prior to the immersion in the industrial plating baths, the chemical reduction of the Pd+2 species (species covalently tethered on the nitrogen-containing groups) to metallic palladium (PdO) is shown to be a key factor in catalyzing the electroless deposition initiation. This is made by immersion in an hypophosphite (H2PO2-) solution. Wettability measurements and X-ray photoelectron spectroscopy (XPS) experiments are used to characterize every surface modification step of the developed process. A cross-hatch tape test was used to asses the adhesion strength of the electroless films that is shown qualitatively good. In addition, a fragmentation test was developed in combination with electrical measurements. Its use allows to distinguish different adhesion levels at the metal/polymer interface and to evidence the influence of some processing parameters.

关键词：镍化学镀层铜化学镀层等离子表面处理表面催化 XPS 剥离试验

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Spread of Extended-Spectrum Beta-Lactamase-Producing Enterobacteriaceae Clinical Isolates from Patients in Bobo-Dioulasso, Burkina Faso

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Journal of Biosciences and Medicines 2025年第1期13卷 394-405页

作者： Kobo gnada Michel Kiréopori gomgnimbou Armel Moumouni Sanou Louis Robert W. Belem Azouman Da Arnaud Quetin Sanou Do Malick Soufiane Sanou Equipe Biologie Molculaire et Biotechnologies Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso Centre dexcellence Africain en Innovations Biotechnologiques pour lElimination des Maladies Transmission Vectorielle (CEA/ITECH-MTV) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Institut Suprieur des sciences de la Sant (IN.S.SA) Universit Nazi BONI Bobo-Dioulasso Burkina Faso laboratoire de Recherche sur les Maladies Infectieuses et Parasitaire (LR-MIP) Institut de Recherche en Science de la Sante Bobo-Dioulasso Burkina Faso Equipe Bactriologie-Mycobactriologie Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso

Antimicrobial resistance (AMR) is one of the top 10 threats to global health and it is estimated around 10 millions of deaths per year are associated with AMR until 2050. Burkina Faso is also facing the emergence and spread of AMR of several bacteria resistant strains such as those of public health concerns under surveillance Enterobacteriaceae. The aim of this study was to assess the prevalence of extended-spectrum beta-lactamase-producing Enterobacteriaceae (ESBL-PE) clinical isolates from patients attending the bacteriology laboratory of the Centre MURAZ in Bobo-Dioulasso, Burkina Faso. Clinical isolates from urine, pus, stool, and semen were collected from April to June 2017. Identification and antibiotic susceptibility testing were performed using the VITEK 2 compact automated system according to EUCAST version 2015 recommendations. ESBL detection was then performed on the Muller-Hinton medium using the combined disc method. One hundred (100) strains of Enterobacteriaceae were isolated from 100 patients, including 52% of ESBLS. Escherichia coli (E. coli) was the most commonly isolated ESBL [(84.62, 44/72) ESBL], followed by Klebsiella spp. [(40%, 06/15) ESBL], then Enterobacter spp. [(40%, 2/5) ESBL]. Risk factor analysis revealed that ESBL-PE infection was frequently found in pus samples (P = 0.042;[OR] = 3.16;95% [CI] = 1.04 - 9.61) and that E. coli was the strain most likely to harbour ESBL (P = 0.008;[OR] = 3.60;95% [CI] = 1.40 - 9.31). This study reports a high prevalence of ESBL-PE associated with strong resistance to quinolones and cotrimoxazole (over 80%), which calls for increased surveillance of these superbugs, the adoption of a rational antibiotic prescription policy, and rigorous hygiene measures to prevent the spread of these multi-resistant bacteria.

关键词： Enterobacteriaceae ESBL Resistance Antibiogram Phenotypes Burkina Faso

Evaluation of Diagnostic Performance of a Multiplex RT-qPCR Method for detecting deNV Serotypes and CHIKV in Clinical Samples, Ouagadougou, Burkina Faso

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Journal of Biosciences and Medicines 2025年第1期13卷 13-20页

作者： Michel Kiréopori gomgnimbou Louis Robert W. Belem Boukandou Passi L. Mongo Shoukrat O. T. Bello Armel Moumouni Sanou Albert Théophane Yonli Théodora Mahoukèdè Zohoncon Jacques Simpore Equipe Biologie Molculaire et Biotechnologies Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso Centre dexcellence Africain en Innovations Biotechnologiques pour lElimination des Maladies Transmission Vectorielle (CEA/ITECH-MTV) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Institut Suprieur des sciences de la Sant (IN.S.SA) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Centre de Recherche Biomolculaire Pietro Annigoni (CERBA) Ouagadougou Burkina Faso laboratoire de Recherche sur les Maladies Infectieuses et Parasitaire (LR-MIP) Institut de Recherche en Science de la Sante Bobo-Dioulasso Burkina Faso laboratoire de Biologie Molculaire et de gntique (LABIOgENE) UFR/SVT Universit Joseph Ki-Zerbo Ouagadougou Burkina Faso Facult de Mdecine Universit Saint Thomas dAquin (USTA) Ouagadougou Burkina Faso

Introduction: Arbovirus diseases such as dengue and chikungunya threaten public health worldwide. Early and rapid diagnosis and surveillance of dengue virus (deNV) and chikungunya virus (CHIKV) infections are essential to the control of these diseases. In this study, we evaluate the diagnostic performance of our new in-house multiplex RT-qPCR method for detecting deNV serotypes and CHIKV in an external laboratory. Methodology: The evaluation study was conducted on 200 clinical samples of suspected patients for arbovirus disease infection, collected in Centre de Recherche Biomoléculaire Pietro Annigoni (CERBA), Ouagadougou, Burkina Faso. Our new multiplex RT-qPCR was compared to the commercial kit, the Zika, dengue, and Chikungunya (ZDC) Real-Time PCR Assays kit (Bio-Rad, California, USA). Results and Conclusions: Among 200 samples, 21.5% (43/200) were deNV-positive by multiplex RT-qPCR, and 21.5% (43/200) were also deNV-positive by reference real-time RT-PCR. 157 (78.5%) samples tested negative for deNV by both tests (new mRT-qPCR and reference test). The sensitivity and specificity of mRT-qPCR were 100%. The deNV serotypes detected were deNV-1 60.5% (26/43) and deNV-3 39.5% (17/43). CHIKV was not detected in this study. Our new mRT-qPCR is sensitive, cost-effective, simple, and can be used in developing country laboratories.

关键词： Evaluation Multiplex RT-qPCR dengue Virus Chikungunya Burkina Faso

Molecular Diagnosis of Sexually Transmitted Infection Reveals a High Frequency of Neisseria gonorrhoeae Infection among Male Urethritis Patients and Highlights the Usefulness of Molecular Testing for Clinical Diagnosis in Burkina Faso

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American Journal of Molecular Biology 2025年第1期15卷 123-134页

作者： Michel Kiréopori gomgnimbou Azouman Da Louis Robert W. Belem Kobo gnada Karlhis Raymond Yao Arnaud Quetin Sanou Armel Moumouni Sanou Soufiane Sanou Dramane Kania Equipe Biologie Molculaire et Biotechnologies Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso Centre dexcellence Africain en Innovations Biotechnologiques pour lElimination des Maladies Transmission Vectorielle (CEA/ITECH-MTV) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Institut Suprieur des sciences de la Sant (IN.S.SA) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Equipe Bactriologie-Mycobactriologie Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso laboratoire de Recherche sur les Maladies Infectieuses et Parasitaire (LR-MIP) Institut de Recherche en Science de la Sante Bobo-Dioulasso Burkina Faso Equipe Virologie-Immunologie Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso

Sexually transmitted infections (STIs) represent a public health problem due to their high prevalence worldwide and the emergence of multidrug resistance of responsible microorganisms. Medical laboratory diagnosis of sexually transmitted genital infections by traditional methods as culture remains extremely delicate, difficult or impossible (to find extremely fragile organisms that can be cultured). Thus, molecular techniques constitute an alternative to improve accurate diagnostic, personalized patient treatment, and public health. A total of 83 clinical samples including urethral discharge and urine samples from individual patients with symptoms of urethritis received were analyzed using traditional methods and a commercial real-time PCR (qPCR) method. Out of 83 urethritis patients, n = 55 (66.26%) were positive for at least one of the STI pathogens detected by qPCR. qPCR assay was more sensitive (50/83, positive cases) compared to culture (15/83, positive cases) and light microscopy (28/83, positive cases). The most prevalent NTD pathogen in the suspected patients was N. gonorrhoeae with 60.24% (50/83) based on real-time PCR diagnosis. Among the positive cases of STI pathogens, Neisseria gonorrhoeae had the highest frequency 49/55 (89.01%) followed by low frequencies of Trichomonas vaginalis 4/55 (7.27%) and Chlamydia trachomatis 1/55 (1.82%). This highlights the high prevalence of N. gonorrhoeae infection in male urethritis patients and a very important misdiagnosis using traditional routine methods in Burkina Faso by medical laboratories. Thus, this situation may negatively impact patients’ personalized treatment and care and public health with the possible rapid emergence of multidrug-resistant strains. This study also highlights the urgent need to optimize culture for the diagnosis of NTD pathogens in Burkina Faso and the usefulness and the need for the introduction of molecular diagnostic methods in routine diagnosis for the detection of NTD pathogens in the

关键词： Molecular Diagnostic Methods Pathogens Sexually Transmitted Infection Urethritis Burkina Faso

Numerical Simulation of Turbulent Diffusion Flames of a Biogas Enriched with Hydrogen

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Fluid Dynamics & Materials Processing 2024年第1期20卷 79-96页

作者： Naima Krarraz Amina Sabeur Khadidja Safer Ahmed Ouadha laboratoire des science et Ingénierie Maritimes Facultéde Génie MécaniqueUniversitédes Sciences et de la Technologie d’Oran Mohamed BoudiafOranAlgérie laboratoire des Carburants gazeux et de l’Environnement Facultéde Génie MécaniqueUniversitédes Sciences et de la Laboratoire des Carburants Gazeux et de l’Environneme

Any biogas produced by the anaerobic fermentation of organic materials has the advantage of being an environmentally friendly ***,the relatively low calorific value of such gases makes their effective utilization in practical applications relatively *** present study considers the addition of hydrogen as a potential solution to mitigate this *** particular,the properties of turbulent diffusion jet flames and the related pollutant emissions are investigated numerically for different operating *** related numerical simulations are conducted by solving the RANS equations in the frame of the Reynolds Stress Model in combination with the flamelet *** effects are also taken into account and the combustion kinetics are described via the gRI-Mech 3.0 reaction *** considered hydrogen fuel enrichment spans the range from 0%to 50%in terms of *** varies between 1 and 10 *** results show that both hydrogen addition and pressure increase lead to an improvement in terms of mixing quality and have a significant effect on flame temperature and *** also reduce CO_(2) emissions but increase NOx *** NO is shown to be the predominant NO formation mechanism.

关键词： Biogas hydrogen diffusion flame turbulence NO formation route pressure

Importance of Molecular Method for detection of Microorganisms in the Exploration of the Infectious etiology of Male Infertility in Burkina Faso

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Journal of Biosciences and Medicines 2025年第1期13卷 272-283页

作者： Michel Kiréopori gomgnimbou Louis Robert W. Belem Armel Moumouni Sanou Claudel Fonessoubo gbadjolbe Arnaud Quetin Sanou Kobo gnada Azouman Da etienne Bilgo Equipe Biologie Molculaire et Biotechnologies Laboratoire de Recherche Centre MURAZ Institut National de Sant Publique Bobo-Dioulasso Burkina Faso Centre dexcellence Africain en Innovations Biotechnologiques pour lElimination des Maladies Transmission Vectorielle (CEA/ITECH-MTV) Universit Nazi BONI Bobo-Dioulasso Burkina Faso Institut Suprieur des sciences de la Sant (IN.S.SA) Universit Nazi BONI Bobo-Dioulasso Burkina Faso laboratoire de Recherche sur les Maladies Infectieuses et Parasitaire (LR-MIP) Institut de Recherche en Science de la Sante Bobo-Dioulasso Burkina Faso Institut de Recherche en sciences de la Sant Direction Rgionale de lOuest Bobo-Dioulasso Burkina Faso

In Burkina Faso, as in other African countries, infertility has become a social burden for the population and a public health problem. Male infertility accounts for 30% to 40% of all infertility cases. The diagnosis of male infertility or hypofertility is often made by a simple laboratory analysis of sperm to explore sperm parameters. In most African countries, such as Burkina Faso, microbiological analysis in the context of sperm analysis is still not developed, and is carried out solely based on microscopy and traditional culture, which does not allow the growth of fragile and demanding bacteria. Our study investigated the microorganisms of sperm that may be involved in male infertility, using conventional bacteriology techniques and real-time PCR. However, it did not intend to perform a multivariate statistical association analysis to estimate the association of microorganisms with abnormal semen parameters. This prospective cross-sectional pilot study was carried out on patients who visited the bacteriology laboratory of Centre MURAZ, a research Institute in Burkina Faso, for male infertility diagnosis between 2 August and 31 August 2021. Bacteria were isolated and identified using standard bacteriology techniques. In parallel, common pathogenic microorganisms known to be associated with male infertility were targeted and detected in the sperm using a multiplex real-time PCR assay. A total of 38 sperm samples were analyzed by bacteriological culture and bacteria isolated were Staphylococcus aureus (S. aureus) 5.55%, Klebsiella pneumoniae (K. pneumoniae), Enterococcus faecalis (E. faecalis), Streptococcus agalactiae (S. agalactiae) and Staphylococcus hoemalyticus (S. hoemalyticus) respectively 2.70%. Real-time PCR targeted and detected Chlamydia trachomatis (C. trachomatis) at 7.89%, Ureaplasma urealyticum (U. urealyticum) at 21.05%, Ureaplasma parvum (U. parvum) at 18.42%, Mycoplasma hominis (M. hominis) at 15.79%, Mycoplasma genitalium (M. genitalium) at 10.53%

关键词： Male Infertility Sperm Microorganisms Culture Molecular Diagnostic Burkina Faso

Direct Ni Electroless Metallization of Poly(etherimide) without Using Palladium as a Catalyst

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材料热处理学报 2004年第05B期25卷 1106-1111页

作者： Marlène Charbonnier Maurice Romand Yves goepfert laboratoire de sciences et Ingenierie des surfaces Universite Claude Bernard - Lyon 1 69622 Villeurbanne Cedex FranceLaboratoire de Sciences et Ingenierie des Surfaces Universite Claude Bernard - Lyon 1 69622 Villeurbanne Cedex FranceUMR 5180 des Sciences Analytiques Universite Claude Bernard - Lyon 1 69622 Villeurbanne Cedex France

Nickel or copper electroless metallization of polymers needs the grafting of a catalyst (palladium in the Pd(0) oxidation state) on the substrate surface to be coated. Our previous works on this topic [1-5] have allowed to develop a simple, tin-free method to attach Pd(+2) species from a palladium chloride (PdCl2) solution on any insulating surface and subsequently to reduce them, in the wet way, into the Pd(0) oxidation state. This Pd(0) state of the catalyst allows an instantaneous initiation of the Ni or Cu deposit by immersion in a plating bath. As palladium is an expensive chemical, it appears interesting to replace it by Ni(0) or Cu(0) species which are catalysts of their own ion reduction. Concerning the direct Ni electroless plating, the polymer surface (PI) was made catalytic for the electroless process by deposition (spin- coating or dipping) of an ultra-thin film of an organic nickel salt in an alcoholic solution. The chemical reduction of this salt, checked by XPS, was performed by chemical or photochemical ways and by plasma. Under these conditions, the initiation, by autocatalysis, of the Ni film deposition in an industrial plating bath was immediate i.e. without any initiation time. The film obtained was homogeneous, dense, bright, well-adhering up to thicknesses reaching

关键词：镍非电金属喷镀等离子处理 XPS 聚酰亚胺

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