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Pipe Flow and Wall Turbulence Using a Modified Navier-Stokes Equation

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Communications in Theoretical Physics 2012年第3期57卷 477-481页

作者： L.Jirkovsky A.muriel Department of Informatics and Geoinformatics Fakulta Zivotniho ProstrediFZPUniversity of J.E.PurkyneKralova Vysina 740096 Usti n.L.Czech Department of Electrical Engineering Columbia UniversityNew York CityUSA Department of Philosophy Harvard UniversityCambridgeMassachusetts 02138USA

We use a derived incompressible modified Navier-Stokes equation to model pipe flow and wall turbulence. We reproduce the observed flattened paraboloid velocity profiles of turbulence that cannot be obtained directly using standard incompressible Navier-Stokes equation. The solutions found are in harmony with multi-valued velocity fields as a definition of turbulence. Repeating the procedure for the flow of turbulent fluid between two parallel flat plates we find similar flattened velocity profiles. We extend the analysis to the turbulent flow along a single wall and compare the results with experimental data and the established controversial yon Karman logarithmic law of the wall.

关键词： fluids instabilities turbulence deterministic chaos

Synthesis, characterization,thermal behavior,and antifungal activity of La(Ⅲ) complexes with cinnamates and 4-methoxyphenylacetate

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Journal of Rare Earths 2013年第11期31卷 1106-1113页

作者： Alberto Aragón-muriel Dorian Polo-Cerón Departamento de Química Universidad del Valle Calle 13 No 100-00 CaliColombia 76001000

In this study a series of trivalent lanthanum complexes with 4-（R）-cinnamate （4-Rcinn, R=H（1）, MeO（2）, Cl（3）） and 4-methoxyphenylacetate ligands （4） were prepared and their antifungal activity against Candida albicans, Aspergillus niger and Trichophyton mentagrophytes were examined. Compounds 1-4 were synthesized by a metathesis reaction and fully characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy, fluorescence spectra, thermogravimetry （TG）, derivative thermogravimetry （DTG）, differential scanning calorimetry （DSC） and X-ray diffraction powder patterns. In emission studies, it was observed that lu-minescence intensity was enhanced in the presence of lanthanide ion. The results of X-ray diffraction patterns indicated that all com-plexes studied exhibited crystalline structure. Thermal behavior by TG, DTG, and DSC studies permitted to estimating the hydration degree of the compounds and showed the formation of decomposition products like lanthanum oxide. Determined by antifungal stud-ies, lanthanum complexes 1-4 demonstrated antifungal activity toward all pathogenic fungal strains tested. Compounds 2 and 4 showed significant growth inhibition for A. niger and C. albicans, respectively.

关键词： antifungal activity La(III) complexes cinnamates 4-methoxyphenylacetate infrared spectra excitation emission TG-DTG-DSC Candida albicans Aspergillus niger Trichophyton mentagrophytes rare earths

Beneficial effects of naringenin in liver diseases: Molecular mechanisms

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World Journal of Gastroenterology 2018年第16期24卷 1679-1707页

作者： Erika Hernández-Aquino Pablo muriel Laboratory of Experimental Hepatology Department of Pharmacology

Liver diseases are caused by different etiological agents, mainly alcohol consumption, viruses, drug intoxication or malnutrition. Frequently, liver diseases are initiated by oxidative stress and inflammation that lead to the excessive production of extracellular matrix(ECM), followed by a progression to fibrosis, cirrhosis and hepatocellular carcinoma(HCC). It has been reported that some natural products display hepatoprotective properties. Naringenin is a flavonoid with antioxidant, antifibrogenic, anti-inflammatory and anticancer properties that is capable of preventing liver damage caused by different agents. The main protective effects of naringenin in liver diseases are the inhibition of oxidative stress, transforming growth factor(TGF-β) pathway and the prevention of the transdifferentiation of hepatic stellate cells(HSC), leading to decreased collagen synthesis. Other effects include the inhibition of the mitogen activated protein kinase(MAPK), toll-like receptor(TLR) and TGF-β non-canonical pathways, the inhibition of which further results in a strong reduction in ECM synthesis and deposition. In addition, naringenin has shown beneficial effects on nonalcoholic fatty liver disease(NAFLD) through the regulation of lipid metabolism, modulating the synthesis and oxidation of lipids and cholesterol. Moreover, naringenin protects from HCC, since it inhibits growth factors such as TGF-β and vascular endothelial growth factor(VEGF), inducing apoptosis and regulating MAPK pathways. Naringenin is safe and acts by targeting multiple proteins. However, it possesses low bioavailability and high intestinal metabolism. In this regard, formulations, such as nanoparticles or liposomes, have been developed to improve naringenin bioavailability. We conclude that naringenin should be considered in the future as an important candidate in the treatment of different liver diseases.

关键词： Naringenin transforming growth factor liver fibrosis MAPKs CCl4 flavonoids JNK hepatic stellate cells cirrhosis Smads α-SMA

Sex hormones in the modulation of irritable bowel syndrome

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World Journal of Gastroenterology 2014年第10期20卷 2433-2448页

作者： Agata Mulak Yvette Taché muriel Larauche Department of Gastroenterology and Hepatology Wroclaw Medical University 50-556 Wroclaw Poland CURE:Digestive Diseases Research Center and Oppenheimer Family Center for Neurobiology of Stress Digestive Diseases Division Department of MedicineUniversity of California Los Angeles VA Greater Los Angeles Healthcare System Los Angeles CA 90073 United States

Compelling evidence indicates sex and gender differences in epidemiology, symptomatology, pathophysiology, and treatment outcome in irritable bowel syndrome (IBS). Based on the female predominance as well as the correlation between IBS symptoms and hormonal status, several models have been proposed to examine the role of sex hormones in gastrointestinal (GI) function including differences in GI symptoms expression in distinct phases of the menstrual cycle, in pre- and post-menopausal women, during pregnancy, hormonal treatment or after oophorectomy. Sex hormones may influence peripheral and central regulatory mechanisms of the brain-gut axis involved in the pathophysiology of IBS contributing to the alterations in visceral sensitivity, motility, intestinal barrier function, and immune activation of intestinal mucosa. Sex differences in stress response of the hypothalamic-pituitary-adrenal axis and autonomic nervous system, neuroimmune interactions triggered by stress, as well as estrogen interactions with serotonin and corticotropin-releasing factor signaling systems are being increasingly recognized. A concept of “microgenderome” related to the potential role of sex hormone modulation of the gut microbiota is also emerging. Significant differences between IBS female and male patients regarding symptomatology and comorbidity with other chronic pain syndromes and psychiatric disorders, together with differences in efficacy of serotonergic medications in IBS patients confirm the necessity for more sex-tailored therapeutic approach in this disorder.

关键词： Brain-gut axis Irritable bowel syndrome Microbiota Pain modulation Sex hormones

Residence time distribution of wood chips in a semi-industrial multiple hearth furnace using RFID tracers Author links open overlay panel

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Particuology 2024年第8期91卷 268-279页

作者： Elie Lacombe muriel Marchand Capucine Dupont Denis Maréchal Thierry Melkior Univ Grenoble Alpes CEALITENDTCHLaboratoire Réacteurs et ProcédésF-38000GrenobleFrance IHE Delft Department of Water Supply Sanitation and Environmental EngineeringDelftthe Netherlands John Cockerill SeraingBelgium

In continuous biomass torrefaction plants,the products'yields,composition and homogeneity highly depend on the residence time of particles.A characterization of particle residence time distribution(RTD)was therefore carried out in an industrial-scale multiple hearth furnace on poplar wood chips using radio frequency identification *** effects of operating conditions,namely,mass flow rate of biomass,shaft speed of the rabbling system and interdental length on the RTD were *** increase of shaft speed and mass flow rate reduces particles’mean residence *** the length between two successive teeth also increases the bed *** biomass accumulation(also called“bulldozing”)was observed during several *** phenomenon is favored by a high mass flow rate of resources,a small interdental length between the teeth and a low shaft *** measurements were compared to the axial dispersion *** all tests,the Peclet number is ranging between 20 and 62,indicating that the multiple hearth furnace cannot be modelled as an ideal plug flow reactor.

关键词： Biomass Multiple hearth furnace Residence time distribution RFID

Performance comparison of chlorinated chiral stationary phases in supercritical fluid chromatography for separation of selected pyrrolidone derivatives

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Journal of Pharmaceutical Analysis 2019年第4期9卷 248-253页

作者： Anca-Elena Dascalu Alina Ghinet muriel Billamboz Emmanuelle Lipka Univ. Lille Inserm U995 - LIRIC - Lille Inflammation Research International Center F-59000 Lille France Ecole des Hautes Etudes d'Ingenieur (HEI) Laboratoire de Pharmacochimie 13 rue de Toul F-59046 Lille France UFR Pharmacie Laboratoire de Chimie Analytique BP 83 F-59006 Lille France 'Alexandru Ioan Cuza’ University of Iasi Faculty of Chemistry Bd. Carol I nr. 11 700506 Iasi Romania

The effects of two chlorinated chiral stationary phases, namely, Lux Cellulose-2 and Lux i-Cellulose-5, flow-rate, percentage of co-solvent and chemical structures of the compounds on retention and resolution were studied within this article. In this work a backpressure of 150 bar, a temperature of 40 ℃ and 10% of methanol as co-solvent were chosen as operating conditions. The optimum flow-rate was 2 mL/min. The percentage of co-solvent was studied between 7.5% and 15%.We have observed that 15% of methanol gave the best results for most of the compounds. For all the derivatives, the Lux Cellulose-2 provided better resolutions going from 1.50 to 3.59 compared with Lux i-Cellulose-5.

关键词： Antibacterial compounds Chirality Enantiomers Flow-rate Particle size

Avian malaria,haematocrit,and body condition in invasive wetland passerines settled in southwestern Spain

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Avian Research 2023年第1期14卷 99-107页

作者： Jaime muriel Luz Garcia-Longoria Sergio Magallanes Juan Antonio Ortiz Alfonso Marzal Instituto de Investigación en Recursos Cinegéticos(IREC) CSIC-UCLM-JCCMRonda de Toledo 1213005Ciudad RealSpain Universidad de Extremadura Facultad de BiologíaDepartamento de AnatomíaBiología Celular y Zoología Avenida de Elvas s/n06006BadajozSpain Estación Biológica de Donana(EBD-CSIC) Departamento de Ecología de los HumedalesAvda.Américo Vespucio 2641092SevillaSpain Hirundo Bird Ringing Group BadajozSpain Grupo de Investigaciones en Fauna Silvestre Universidad Nacional de San MartínJr.Maynas177722021TarapotoPeru

Avian malaria and related haemosporidian parasites can negatively impact fitness in many *** on the malaria infection and its physiological costs on their avian hosts is heavily skewed toward native passerines,with exotic species ***,introduced species may carry on and spread new pathogens to native species,and play a role on parasite transmission cycle in invaded bird communities as pathogen ***,we molecularly assess the prevalence and diversity of haemosporidian parasites in three introduced wetland passerines(the Red Avadavat Amandava amandava,the Yellow-crowned Bishop Euplectes afer,and the Common Waxbill Estrilda astrild)captured during the same season in southwestern *** also explored the relation between parasite infection,body condition,haematocrit,and uropygial gland *** detected an overall parasite prevalence of 3.55%,where Common Waxbills showed higher prevalence(6.94%)than Red Avadavats(1.51%).None Yellow-crowned Bishops were infected with *** 60%of infections were caused by Leucocytozoon,and about 40%by *** identified four unique lineages of Plasmodium and three of ***,91%of the identified host-parasite interactions represented new host records for these haemosporidian *** infection was not related to body condition,haematocrit,and uropygial gland volume of the wetland *** values varied seasonally among bird ***,haematocrit was positively related to body condition in the Yellow-crowned Bishops,but not in the other *** Avadavats had higher haematocrit levels than Yellow-crowned Bishops,whereas Common Waxbills showed the lower haematocrit *** uropygial gland volume was positively correlated with body condition in all bird *** Waxbills showed higher uropygial gland volumes related to their body size than birds from other two *** outcomes highlight the importance of e

关键词： Avian malaria Exotic species Introduced birds Leucocytozoon Plasmodium Uropygial gland

Long-Run Real Exchange Rate and Key Macroeconomic Indicators in WAEMU

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Long-Run Real Exchange Rate and Key Macroeconomic Indicators...

作者： AMETOGLO muriel Eyram Silo 湖南大学

学位级别：硕士

货币联盟的目的是寻求成员国经济的发展和福利的提高。西非经济与货币联盟的目标是达成统一的货币政策和判别标准。尽管这个联盟享有统一的固定名义汇率，但不能忽视各成员国间的生活水平差异，并且这种差异反应在实际汇率中。实际汇率... 详细信息

货币联盟的目的是寻求成员国经济的发展和福利的提高。西非经济与货币联盟的目标是达成统一的货币政策和判别标准。尽管这个联盟享有统一的固定名义汇率，但不能忽视各成员国间的生活水平差异，并且这种差异反应在实际汇率中。实际汇率是一个动态变量，它的变动性由诸如经济增长、通胀率，利率等因素决定。本文分析了在长期中实际汇率与主要宏观经济变量之间的关系，实证研究是基于协整和误差修正模型对WAEMU中五个国家1980-2009年间的指标进行分析。结果显示，对每一个测试的国家而言都存在至少一个这样的长期关系。此外，我们发现在各个国家中宏观经济指标对实际汇率的影响有着很大的差别，同时指出了WAEMU的收敛性和齐次性存在的问题。

关键词：汇率通货膨胀利率 CFA WAEMU 货币联盟协整误差修正模型

Zinc-mediated reactions on salicylaldehyde for Botrytis cinerea control

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Chinese Chemical Letters 2020年第3期31卷 706-710页

作者： Antoine Franche Claire Imbs Antoine Fayeulle Franck Merlier muriel Billamboz Estelle Léonard Sorbonne University Universitéde technologie de CompiègneESCOMEA TIMR 4297Centre de recherche de RoyallieuCS 6031960203 Compiègne cedexFrance ESCOM UTCEA TIMR 42971 allée du Réseau Jean-Marie Buckmaster60200 CompiègneFrance Sorbonne Universités Universitéde Technologie de CompiègneGénie Enzymatique et Cellulaire(GEC)UMR-CNRS 7025CS 6031960203 Compiègne CedexFrance Laboratoire de chimie durable et santé Yncrea Hauts-de-FranceHEI13 rue de Toul59046 Lille CedexFrance

Botrytis cinerea is a necrotrophic fungusth at a ffects various plant *** control is an ecessity and as much as possible,eco-friendly conditions and bioresources to obtain these chemicals should be *** this context,a series of products w as obtained from salicylaldehyde using zinc as a powerful reagent and tested for antifungal activity against Botrytis cinerea.

关键词： Salicylaldehyde Zinc-mediated reactions Green solvents Alkoxymethylphenol PEG-cresol Botrytis cinerea control