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Effect of glycine addition on the in-vitro corrosion behavior of AZ31 magnesium alloy in Hank’s solution

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Journal of Materials Science & Technology 2021年第22期81卷 97-107页

作者： Durga Bhakta Pokharel Liping Wu Junhua Dong amar Prasad Yadav Dhruba Babu Subedi Madhusudan Dhakal Lin Zha Xin Mu Aniefiok Joseph Umoh Wei Ke Shenyang National Laboratory for Materials Science(SYNL) Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Material Science and Engineering University of Science and Technology of ChinaHefei230026China Environmental Corrosion Center Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Central Department of Chemistry Tribhuvan UniversityKirtipurNepal

This study reports on the effect of the addition of Glycine to Hank’s solution on the in-vitro corrosion behavior of AZ31 magnesium(Mg)alloy at 37℃and a pH of 7.4 studied by using potentiodynamic polarization(PDP),hydrogen collecting techniques and electrochemical impedance spectroscopy(EIS)in combination with surface characterization techniques such as optical microscopy(OM),scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),X-ray diffraction(XRD)and X-ray photoelectron spectroscopy analysis(XPS).The results reveal that adsorption of glycine initially subdues the dissolution of AZ31 Mg alloy while in long run it enhances the dissolution of the alloy due to the commencement of the chelation effect of glycine with Ca^(2+) released from *** chelation of glycine with Ca^(2+) induces the formation of cracks in the surface film which further promotes the dissolution of AZ31 Mg alloy thereby forming a porous corrosion products layer on the surface of the *** a result,both the continuous dissolution of AZ31 magnesium alloy and the hydrogen evolution rate(HER)are enhanced with increasing the immersion time in Hank’s solution.

关键词： AZ31 Mg alloy Glycine Hank’s solution EIS Chelating effect

Neonatal heart murmur:Is it useful for the diagnosis of congenital heart diseases?

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World Journal of Pediatrics 2014年第1期10卷 91-91页

作者： amar Taksande Jawaharlal Nehru Medical College Sawangi MegheWardha Maharashtra-442004India

Congenital heart disease(CHD)is one of the commonest congenital malformations,affecting 7-8 per 1000 live births,which are mostly asymptomatic at birth.[1]The prevalence of cardiac murmur varies from 0.6%to 47.4%and is dependent on sample size,auscultator conditions and skills of the examiner.[1-3]However,not all neonates with CHD are found to have a murmur at postnatal check,and those with murmurs will not have *** et al[3]reported that if a murmur is heard,there is an incidence of 42.5%for cardiac *** contrast,Du et al[4]mentioned that heart murmur in 84%of neonates was caused by heart diseases and only 16%were innocent with a diagnosis of heart disease confirmed by ***,Karatza et al[5]found that auscultation alone has a limited ability to distinguish a pathologic from innocent murmur.

关键词： diagnosis congenital diseases

Analytical Approach for the Systematic Research of the Periodic Ferroresonant Solutions in the Power Networks

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Energy and Power Engineering 2011年第4期3卷 450-477页

作者： Fathi Ben amar Rachid Dhifaoui 不详

Ferroresonance is a complex and little known electrotechnical phenomenon. This lack of knowledge means that it is voluntarily considered responsible for a number of unexplained destructions or malfunctioning of equipment. The mathematical framework most suited to the general study of this phenomenon is the bifurcation theory, the main tool of which is the continuation method. Nevertheless, the use of a continuation process is not devoid of difficulties. In fact, to continue the solutions isolats which are closed curves, it is necessary to know a solution belonging to this isolated curve (isolat) to initialise the continuation method. The principal contribution of this article is to develop an analytical method allowing systematic calculation of this initial solution for various periodic ferroresonant modes (fundamental, harmonic and subharmonic) appearing on nonlinear electric system. The approach proposed uses a problem formulation in the frequency domain. This method enables to directly determine the solution in steady state without computing of the transient state. When we apply this method to the single-phase ferroresonant circuits (series and parallels configurations), we could easily calculate an initial solution for each ferroresonant mode that can be established. Knowing this first solution, we show how to use this analytical approach in a continuation technique to find the other solutions. The totality of the obtained solutions is represented in a plane where the abscissa is the amplitude of the supply voltage and the ordinate the amplitude of the system’s state variable (flux or voltage). The curve thus obtained is called “bifurcation diagram”. We will be able to then obtain a synthetic knowledge of the possible behaviors of the two circuits and particularly the limits of the dangerous zones of the various periodic ferroresonant modes that may appear. General results related to the series ferroresonance and parallel ferroresonance, obtained numerically sta

关键词： Transformer Ferroresonance Fundamental Mode Harmonic Mode Subharmonic Mode Fractional Mode Isolat Limit Point Bifurcation Dangerous Zone

Maize production under risk:The simultaneous adoption of off-farm income diversification and agricultural credit to manage risk

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Journal of Integrative Agriculture 2019年第2期18卷 460-470页

作者： Shoaib Akhtar LI Gu-cheng Adnan Nazir amar Razzaq Raza Ullah Muhammad Faisal Muhammad Asad Ur Rehman Naseer Muhammad Haseeb Raza College of Economics&Management Huazhong Agricultural UniversityWuhan 430070P.R.China Institute of Agricultural and Resource Economics University of Agriculture FaisalabadFaisalabad 38000Pakistan

Farmers in Pakistan continue to produce maize under various types of risks and adopt several strategies to manage those risks. This study is the first attempt to investigate the factors affecting the concurrent adoption of off-farm income diversification and agricultural credit which the farmers use to manage the risk to maize production. We apply bivariate and multinomial probit approaches to the primary data collected from four districts of Punjab Province in Pakistan. The results show that strong correlations exist between the off-farm diversification and agricultural credit which indicates that the use of one risk management strategy leads to another. The findings demonstrate that education, livestock number, maize farming experience, perceptions of biological risks and risk-averse nature of the growers significantly encourage the adoption of diversification as a risk management tool while farm size inversely affects the adoption of diversification. Similarly, in the adoption equation of credit, maize farming experience, farm size, perceptions of price and biological risks and risk attitude of farmers significantly enhance the chances of adopting agricultural credit to manage farm risks. These findings are important for the relevant stakeholders who seek to offer carefully designed risk minimizing options to the maize farmers.

关键词： maize off-farm diversification credit multinomial probit Pakistan

Wind Energy Conversion Systems Adapted to the Tunisian Sites

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Smart Grid and Renewable Energy 2013年第1期4卷 57-68页

作者： Fathi Ben amar Mustapha Elamouri Department of Technology Preparatory Institute for Engineering Studies of Sfax (IPEIS) Sfax Tunisia

The choice of a wind turbine for a given site is a very significant operation. It is advised to make an in-depth study on the characteristics of the aerogenerator and the implantation site before any installation of a wind farm for choosing well the system best adapted to the energy needs. The objective of this study is to sensitize the users of the wind energy on the various problems involved in the aerogenerator installation on any site and to provide a decision-making aid to the judicious choice of the wind system best adapted. The idea is to estimate, for a selected implantation site, the energy production and the operating time of several wind systems. We can thus select the aerogenerator best adapted by making a compromise between a maximum recovery of energy and a high time of production. The influence height of the aerogenerator on energy profitability is also studied. We apply this step to the twenty six Tunisian synoptic sites by implantation scenarios of seven wind systems of various nominal speeds in function of the height.

关键词： Tunisia Wind Energy Wind Turbine Meteorological Method

New insights into the combined effects of geographical origin,cultivar and crop season on the physicochemical characteristics of Moroccan olive oils produced in northern Morocco.A comparative study

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Oil Crop Science 2024年第4期9卷 255-264页

作者： Noura Issaoui Inmaculada Olivares amar Habsaoui Mohamed Ebn Touhami Adil Khtira El Hassan Sakar Sebastian Sanchez Ibn Tofail University Faculty of SciencesDepartment of ChemistryMaterials Engineering and Environment Laboratory:Modelling and ApplicationKenitraMorocco University Institute of Research on Olive Grove and Olive Oils GEOLIT Science and Technology ParkUniversity of Jaen23620MengibarSpain Department of Chemical Environmental and Materials EngineeringUniversity of Jaen23071JaenSpain Laboratory of Biology Ecologyand HealthFSAbdelamlek Essaadi UniversityTetouanMorocco

The Tangier-Tetouan-Al Hoceima(TTA)region is one of the main olive oil producing regions in *** is devoted to characterize olive oil physicochemical traits from TTA hence the originality of this *** aimed at investigating variation in olive oil quality produced from three Moroccan cultivars‘Moroccan Picholine’,‘Menara’,and‘Haouzia’and their *** was performed in five provinces fromTTA(Northern Morocco)during four consecutive crop-seasons(2018-2021)considering three extraction technologies(ET):traditional discontinuous press system(SP)and continuous extraction systems including decanter of three outlets(3O)and decanter of two outlets(2O).Physicochemical measurements consisted of routinely quality parameters namely free acidity(FA),peroxide value(PV),UV absorption parameters(K232,K270,andΔK),chlorophylls(Chl)and carotenoids(Car)contents,total phenolic compounds(TPC)and oxidative stability(OS).Crop season showed its superiority impacts on K232,OS,TPC,Chl,and *** cultivar was the main variability source in both PV and K270,and FA was mainly determined by *** variations(p<0.05)were reported among crop seasons and locations due to pedoclimatic differences.‘Menara’and‘Haouzia’had higher pigments content,TPC,and OS,and the blends displayed low pigments concentration,TPC,and ***,continuous ET(2O and 3O)had the greatest values of pigments content,TPC,and OS as revealed by principal component *** correlations were highlighted among basic quality parameters,TPC,pigments,and *** linear regression was used to describe the relationships between OS and TPC(R^(2)=0.856)and OS regressed against Chl(R^(2)=0.690)and Car(R^(2)=0.760),while TPC were regressed on Chl(R^(2)=0.670)and Car(R^(2)=0.680)and finally Chl against Car(R^(2)=0.931).In conclusion,compared to technological,genotypic,and geographic effects,climatic conditions were the main factor driving olive oil stability and associated phenolics and pigments;oil c

关键词： Moroccan cultivars Olive oil Oxidative stability Pigments Quality parameters Total phenolic compounds

LIMIT CYCLES OF THE GENERALIZED POLYNOMIAL LINARD DIFFERENTIAL EQUATION

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Annals of Differential Equations 2012年第2期28卷 127-131页

作者： Amel Boulfoul amar Makhlouf Dept.of Math. University of AnnabaBP12El Hadjar23000AnnabaAlgeria

We investigate the generalized polynomial Linard differential equations. Using the averaging theory of first and second order, we obtain the maximum number of limit cycles of the system.

关键词： limit cycles Linard equation averaging theory

Progranulin promotes neurite outgrowth and neuronal differentiation by regulating GSK-3β

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Protein & Cell 2010年第6期1卷 552-562页

作者： Xue Gao Alvin P.Joselin Lei Wang amar Kar Payal Ray Andrew Bateman Alison M.Goate Jane Y.Wu Department of Neurology Lurie Cancer CenterCenter for Genetic Medicine Northwestern University Feinberg School of MedicineChicagoIL 60611USA Division of Experimental Medicine McGill Universityand Endocrine Research LaboratoryRoyal Victoria HospitalMontréalQuébecCanada Department of Psychiatry Washington University School of MedicineSt.LouisMO 63110USA Present address:Cellular and Molecular Medicine University of OttawaOntarioCanada

Progranulin(PGRN)has recently emerged as a key player in a subset of frontotemporal dementias(FTD).Numerous mutations in the progranulin gene have been identified in patients with familial or sporadic frontotemporal lobar degeneration(FTLD).In order to understand the molecular mechanisms by which PGRN deficiency leads to FTLD,we examined activity of PGRN in mouse cortical and hippocampal neurons and in human neuroblastoma SH-SY5Y *** of mouse neurons with PGRN protein resulted in an increase in neurite outgrowth,supporting the role of PGRN as a neurotrophic *** treatment stimulated phosphorylation of glycogen synthase kinase-3 beta(GSK-3β)in cultured *** of PGRN in SH-SY5Y cells impaired retinoic acid induced differentiation and reduced the level of phosphorylated GSK-3β.PGRN knockdown cells were also more sensitized to staurosporineinduced *** results reveal an important role of PGRN in neurite outgrowth and involvement of GSK-3βin mediating PGRN *** of GSK-3βactivation as a downstream event for PGRN signaling provides a mechanistic explanation for PGRN activity in the nervous *** work also suggest that loss of axonal growth stimulation during neural injury repair or deficits in axonal repair may contribute to neuronal damage or axonal loss in FTLD associated with PGRN ***,our study suggests that modulating GSK-3βor similar signaling events may provide therapeutic benefits for FTLD cases associated with PGRN mutations.

关键词： progranulin frontotemporal lobar degeneration glycogen synthase kinase 3 beta(GSK-3β) neurite outgrowth

Liquefaction Potential Assessment of Guwahati City Using One Dimensional Ground Response Analysis

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Journal of Geoscience and Environment Protection 2020年第5期8卷 176-194页

作者： amar Farooq Siddique Binu Sharma Department of Civil Engineering Assam Engineering College Guwahati India

Guwahati city which lies in the North Eastern region of India, falls in the highest seismic risk zonal level i.e. zone V in India. However, there are very few works on seismic hazard analysis of Guwahati soil considering the local site effects. The effect of large modifications in seismic waves that occur due to variation in soil properties near the surface of the earth is of great importance in geotechnical earthquake engineering. Seismic soil liquefaction, a soil seismic hazard, is evaluated in Guwahati city in terms of factor of safety against liquefaction along the soil profiles using ground response analysis. One dimensional ground response analysis has been conducted using equivalent linear and non linear method using the Deepsoil software. The input motion of 2011 Sikkim earthquake (Mw = 6.9) having bedrock PGA of 0.152 g at 30 m depth is considered. A comparative study has been made of the equivalent linear and non linear analysis in terms of surface PGA (g), maximum strain (%), maximum stress ratio and liquefaction potential using soil profiles of Guwahati city. It has been observed that stiffer soil layer results in similar PGA from both the analysis however non linear analysis generally gives a lesser surface PGA than by equivalent linear analysis. Non linear analysis generally gives a higher strain range and a lower maximum stress ratio as compared to the equivalent linear method. A slightly higher factor of safety is obtained using non linear analysis than using equivalent linear analysis. A soil database of 200 bore holes was used for the study. Spatial distribution of soil liquefaction potential is presented in the form of GIS based maps of factor of safety values.

关键词： Ground Response Analysis Equivalent Linear Method Non Linear Method Soil Liquefaction