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Structural Characterization and Antioxidant Activity of Lignin Extracted from Ficus Carica L.

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Journal of Renewable Materials 2019年第4期7卷 345-354页

作者： Ibtissem moussa Ramzi Khiari Ali moussa Gérard Mortha mohamed Farouk Mhenni University of Monastir Faculty of SciencesUR13 ES 63-Research Unity of Applied Chemistry&EnvironmentAvenue of the environment5019 MonastirTunisia University of Monastir National Engineering School of MonastirStreet of Ibn El Jazzar5000 MonastirTunisia Higher Institute of Technological Studies of Ksar-Hellal Department of Textile-TunisiaAvenue of Hadj Ali Soua.5070 Ksar-HellalTunisia University of Grenoble Alpes CNRSGrenoble INPLGP2F-38000 GrenobleFrance

The most abundant phenolic biopolymer in the biosphere is the *** phenolic biopolymer commonly exists in combination with polysaccharides and other cell wall *** this study,the solvent system dioxane-water is used to extract lignin,which is considered as unaltered native *** dioxane lignin extracted from fig stems was characterized regarding to its structural feature,quantification of its functional groups,molecular weight,and evaluation of its thermal *** and molecular weight distribution of the studied lignin indicated that isolated lignin contained a low amount of sugar(c.a.19%)and had a high weight-average molecular weight(10068 ***-1).Lignin sample had approximately the same amounts of guaiacyl(G)and p-hydroxyphenyl(H)units with relatively fewer syringyl(S)*** isolated lignin revealed good antioxidant ***,it proved to have a high potential of application in new antioxidants formulations.

关键词： Ficus Carica L. lignin organosolv molecular weight NMR spectroscopy antioxidant activity

Application of Prunus amygdalus By-products in Eco-friendly Dyeing of Textile Fabrics

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Journal of Renewable Materials 2018年第1期6卷 55-67页

作者： Ibtissem moussa Noureddine Baaka Ramzi Khiari Ali moussa Gérard Mortha mohamed Farouk Mhenni University of Monastir Faculty of SciencesUR13ES63-Research Unity of Applied Chemistry&Environment5000 MonastirTunisia Higher Institute of Technological Studies of Ksar Hellal Department of TextilesRue Hadj Ali Soua-B.P.n°68-5070 Ksar HellalTunisia Institute of Engineering University of Grenoble AlpesCNRSGrenoble INPLGP2F-38000 GrenobleFrance National Engineering School of Monastir 5019 MonastirTunisia

Natural dyes have become an interesting subject of study because of their better ecological properties in comparison to their synthetic *** article concerns the dyeing of wool,silk,and polyamide fabrics with natural dyes extracted from almond shells and *** developed method of dyeing by these extracts is interesting and very attractive for several reasons:firstly,the extracts used are the black liquor discharged from the industries of delignification,which is a chemical process for removing lignin from agricultural wastes to produce a cellulosic fiber;(ii)these natural dyes are renewable and available in large quantities;(iii)this method is economical;and(iv)lastly,the dyeing performances of the obtained dyed textiles are very *** color of each dyed material was investigated in terms of the CIELAB coordinates and their fastness properties measured by washing,rubbing,and light.

关键词： Almond shell almond stem fastness properties natural dyes residual lignin

A Well-Balanced FVC Scheme for 2D Shallow Water Flows on Unstructured Triangular Meshes

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Advances in Applied Mathematics and Mechanics 2023年第5期15卷 1335-1378页

作者： moussa Ziggaf Imad Kissami mohamed Boubekeur Fayssal Benkhaldoun ENSAO LMCSComplexe UniversitaireB.P.66960000 OujdaMorocco MSDA Mohammed VI Polytechnic UniversityLot 66043150 Ben GuerirMorocco Universit´eéSorbonne Paris Nord LAGACNRSUMR 7539F-93430VilletaneuseFrance

This paper aims to present a new well-balanced,accurate and fast finite volume scheme on unstructured grids to solve hyperbolic conservation *** is a scheme that combines both finite volume approach and characteristic *** this study,we consider a shallow water system with Coriolis effect and bottom friction stresses where this new Finite Volume Characteristics(FVC)scheme has been *** physical and mathematical properties of the system,including the C-property,have been well ***,we developed this approach by preserving the advantages of the finite volume discretization such as conservation property and the method of characteristics,in order to avoid Riemann solvers and to enhance the accuracy without any complexity of the MUSCL ***,a discretization was applied to the bottom source term that leads to a well-balanced scheme satisfying the steady-state condition of still water.A semi-implicit treatment will also be presented in this study to avoid stability problems due to source ***,the proposed finite volume method is verified on several benchmark tests and shows good agreement with analytical solutions and experimental results;moreover,it gives a noteworthy accuracy and rapidity improvement compared to the original approaches.

关键词： Shallow water model method of characteristics FVC scheme finite volume method well-balanced scheme

Impacts of climate change on water quantity, water salinity, food security, and socioeconomy in Egypt

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Water Science and Engineering 2021年第1期14卷 17-27页

作者： Mohie El Din mohamed Omar Ahmed Moustafa Ahmed moussa Reinhard Hinkelmann National Water Research Center Fum Ismailiya CanalShoubra El-Kheima 13411Egypt International Center for Agricultural Research in the Dry Areas Cairo 2416Egypt Nile Research Institute(NRI) National Water Research CenterEl-Qanater 13621Egypt Department of Water Engineering Technische Universit€at Berlin(TU Berlin)Campus El GounaEl Gouna 84513Egypt

Climate change might have direct impacts on water quantity in Egypt and lead to indirect effects on Mediterranean saltwater intrusion to groundwater,which exposes agriculture to *** study investigated impacts of climate change on agriculture,with particular regard to food security and socioeconomy,and quantified the effectiveness of cropping pattern adaptation measures by integrating three mathematical *** BlueM model was used for hydrological simulations of Nasser Lake under flooding scenarios to predict the water supply from the High Aswan *** water and salinity balance(WB-SAL)model was adopted to estimate the water salinity in the Nile *** simulated results from the BlueM and WB-SAL models were integrated with the agricultural simulation model for Egypt(ASME)to project cropping patterns,food security,and socioeconomy throughout the *** results showed that future climate change will directly affect the total crop area;crop areas for 13 crop types;the self-sufficiency of wheat,rice,cereal,and maize supplies;and socioeconomic *** proposed cropping pattern adaptation measures focus on fixing the crop areas of rice and orchards and providing half of the population with lentils,maize,onion,vegetables,milk,and *** adaptation measures have the potential to promote food security without causing deterioration of the socioeconomic ***,water availability has much more significant effects on food security and socioeconomy than cropping pattern adaptation measures ***,the country should rationalize water use efficiency and increase water supply.©2021 Hohai *** and hosting by Elsevier *** is an open access article under the CC BY-NC-ND license(http://***/licenses/by-nc-nd/4.0/).

关键词： Climate change Water quantity Salinity Cropping pattern adaptation measures Food security Socioeconomy

Antibacterial activity of various honey types of Algeria against Staphylococcus aureus and Streptococcus pyogenes

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Asian Pacific Journal of Tropical Medicine 2012年第10期5卷 773-776页

作者： Ahmed moussa Djebli Noureddine Hammoudi Si mohamed Meslem Abdelmelek Aissat Saad Institute of Veterinary Sciences University Ibn-khadoun Tiaret(14000) Algeria Departments of Biology Faculty of SciencesMostaganem UniversityAlgeria

Objective:To assess the in vitro antibacterial activity of honey from different geographical location on Gram negative ***:Different concentrations(Undiluted honey,10%, 30%,50%and 70%wt/vol) of honey were studied in vitro using Staphylococcus aureus(***) and Streptococcus pyogenes(***),briefly,two-fold dilutions of honey solutions were tested to determine the minimum inhibitory concentration(MIC) against each type of microorganism,followed by more assays within a narrower dilution range to obtain more precise MIC *** were determined by both visual inspection and spectrophotometric assay at 620 *** honey samples were compared with standard antibiotics like ampicillin,penicillin G,amoxicillin,gentamycin,tobramycin,erythromycin and chloramphenicol was determined by the disc diffusion ***:The diameter of zone of the inhibition(ZDI) of honey has various concentrations tested for the isolates ranged 0-46 mm for ***,0-44 mm for *** the MIC(%) ranged 12%-95%,25%-73%***:Algeria honey,in-vitro,possess antibacterial activity.

关键词： Honey Antibacterial activity Staphylococcus aureus Streptococcus pyogenes

Mathematical Model and Advanced Control for Gas-phase Olefin Polymerization in Fluidized-bed Catalytic Reactors

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Chinese Journal of Chemical Engineering 2008年第1期16卷 84-89页

作者： Ahmmed S. Ibrehem mohamed Azlan Hussain nayef M. Ghasem Department of Chemical Engineering University of Malaya 50603 Kuala Lumpur Malaysia Department of Chemical ＆ Petroleum Engineering UAE University Al-Ain 17555 UAE

In this study, the developments in modeling gas-phase catalyzed olefin polymerization fluidized-bed reactors （FBR） using Ziegler-Natta catalyst is presented. The modified mathematical model to account for mass and heat transfer between the solid particles and the surrounding gas in the emulsion phase is developed in this work to include site activation reaction. This model developed in the present study is subsequently compared with well-known models, namely, the bubble-growth, well-mixed and the constant bubble size models for porous and non porous catalyst. The results we obtained from the model was very close to the constant bubble size model, well-mixed model and bubble growth model at the beginning of the reaction but its overall behavior changed and is closer to the well-mixed model compared with the bubble growth model and constant bubble size model after half an hour of operation. Neural-network based predictive controller are implemented to control the system and compared with the conventional PID controller, giving acceptable results.

关键词： fluidized-bed reactor olefin polymerization mathematical model dynamic studies control system

Monitoring the variation of soil quality with sewage sludge application rates in absence of rhizosphere effect

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International Soil and Water Conservation Research 2020年第3期8卷 245-252页

作者： Rahma Inès Zoghlami Helmi Hamdi Sonia Mokni-Tlili Sarra Hechmi mohamed Naceur Khelil Nadhira Ben Aissa mohamed moussa Habib Bousnina Saoussen Benzarti Naceur Jedidi Arid Regions Institute University of GabèsMèdenine4119Tunisia Water Research and Technology Center University of CarthageP.O.Box 273Soliman8020Tunisia Center for Sustainable Development College of Arts and SciencesQatar UniversityP.O.Box 2713DohaQatar National Institute for Research in Rural Engineering Water and ForestryP.O.Box 10Ariana2080Tunisia National Institute of Agronomy 43 Av.Charles NicolleTunis1082Tunisia College of Agriculture at Mograne University of Carthage1121MograneTunisia

Agricultural soils in semi-arid regions have frequently been degraded due to adverse climatic conditions,organic matter depletion,and poor farming *** enhance soil quality,this study examines the reuse of sewage sludge(SS)as an available source of organic matter in a typical Mediterranean sandy-loam ***,we studied the cumulative effect of two annual applications of 40,80 and 120 tons of sludge per ha on soil quality in absence of *** dose-dependent improvement of organic matter content was the most significant event that reflected sludge application rates,and consequently influenced other soil ***,soil structural stability increased by 13.3%,28.8%and 59.4%for treatments SS-40,SS-80 and SS-120 respectively as compared to unamended *** stability improvement was also confirmed by the dose-dependent variation of other edaphic factors including calcium content,the microbial quotient as well as Welt and C:N *** param-eters are involved in cementing soil aggregates by cation bridging,the formation of microbial mucilage,and clay-humic *** magnetic susceptibility(SMS)was measured in situ as a possible rapid tool to evaluate soil *** showed significant correlation with sludge dose and stability amelioration testifying to the aggregation role that can play Al2O3 and particularly Fe2O3 minerals added by the hematite-rich ***,analytical results and field observations revealed no trends of soil salinization or acidification by excessive sludge *** avoiding the rhizosphere effect,outcomes could reflect the resilience and intrinsic capacity of the soil to cope with excessive sludge loads.

关键词： Sandy loam soil Urban sewage sludge Structural stability Soil degradation Aggregation Magnetic susceptibility

Somatic molecular changes and histo-pathological features of colorectal cancer in Tunisia

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World Journal of Gastroenterology 2013年第32期19卷 5286-5294页

作者： Sana Aissi Marie Pierre Buisine Farid Zerimech Nadia Kourda Amel moussa mohamed Manai Nicole Porchet Laboratory of Biochemistry and Molecular Biology Science University of Tunis2092 El Manar TunisTunisia Centre de Recherche Jean-Pierre Aubert INSERM U83759000 LilleFrance Laboratory of Biochemistry and Molecular Biology CHRU de Lille59000 LilleFrance Medicine University of H Warembourg University of Lille Nord de France59045 LilleFrance Anatomopathology Department Charles Nicolle Hospital of Tunis1006 TunisTunisia Gastro-Enterology Department Charles Nicolle Hospital of Tunis1006 TunisTunisia

AIM:To determine correlations between family history,clinical features and mutational status of genes involved in the progression of colorectal cancer(CRC).METHODS:Histo-pathological features and molecular changes[KRAS,BRAF and CTNNB1 genes mutations,microsatellite instability(MSI)phenotype,expression of mismatch repair(MMR)and mucin(MUC)5AC proteins,mutation and expression analysis of TP53,MLH1promoter hypermethylation analysis]were examined in a series of 51 unselected Tunisian CRC patients,10 of them had a proven or probable hereditary disease,on the track of new tumoral markers for CRC susceptibility in Tunisian ***:As expected,MSI and MMR expression loss were associated to the presence of familial CRC(75%vs 9%,P<0.001).However,no significant associations have been detected between personal or familial cancer history and KRAS(codons 12 and 13)or TP53(exons 4-9)alterations.A significant inverse relationship has been observed between the presence of MSI and TP53 accumulation(10.0%vs 48.8%,P=0.0335)in CRC tumors,suggesting different molecular pathways to CRC that in turn may reflect different environmental ***,MUC5AC expression was significantly associated to the presence of MSI(46.7%vs 8.3%,P=0.0039),MMR expression loss(46.7%vs8.3%,P=0.0039)and the presence of familial CRC(63%vs 23%,P=0.039).CONCLUSION:These findings suggest that MUC5AC expression analysis may be useful in the screening of Tunisian patients with high risk of CRC.

关键词： DNA mismatch repair KRAS TP53 Mucin 5AC

Community knowledge,attitudes and practices related to schistosomiasis and associated healthcare-seeking behaviours in northern Côte d’Ivoire and southern Mauritania

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Infectious Diseases of Poverty 2018年第1期7卷 691-703页

作者： Amoin Jeanne d’Arc Koffi mohamed Doumbia Gilbert Fokou moussa Keita Brama Kone N’doumy Noel Abe Department of Research and Development Centre Suisse de Recherches Scientifiques en Cote d’IvoireAbidjanCote d’Ivoire Environment and Communication Training Unit University Alassane OuattaraBouakeCote d’Ivoire Ethno-Sociology Institute University Felix Houphouet-BoignyAbidjanCote d’Ivoire Faculty of Letters and Social Sciences University of NouakchottNouakchottMauritania University Peleforo-Gbon-Coulibaly KorhogoCote d’Ivoire

Background:Among parasitic infections,schistosomiasis ranks second after malaria in terms of worldwide *** efforts to contain transmission,more than 230 million people are infected,of which 85%live in Sub-Saharan *** the epidemiologic characteristics of schistosomiasis have been extensively studied across endemic settings,social factors have been paid less *** current study assesses community knowledge of schistosomiasis causes,transmission,signs,symptoms and prevention,as well as healthcare-seeking behaviours in two West African settings,with the aim of strengthening schistosomiasis control ***:From August 2014 to June 2015,we conducted two cross-sectional surveys in Korhogo,Cote d’Ivoire and Kaedi,*** applied a questionnaire to collect quantitative data at the household level in Korhogo(n=1456)and Kaedi(n=1453).Focus group discussions(Korhogo:n=32,Kaedi:n=32)and participatory photography(photovoice)(Korhogo:n=16,Kaedi:n=16)were conducted within the communities to gather qualitative *** addition,semi-structured interviews were used to discuss with key informants from control programmes,nongovernmental organizations and health districts(Korhogo:n=8,Kaedi:n=7).Results:The study demonstrated that schistosomiasis is not well known by the communities;64.1%claimed to know the causes of the disease,but the reality is *** knowledge is more from cultural than biomedical *** was observed that social construction of the disease is different from the biomedical *** Korhogo,schistosomiasis was often associated with several other diseases,notably stomach ulcer and *** populations believe that schistosomiasis is caused by exposure to goat or dog urine in the *** Kaedi,schistosomiasis is considered as a disease transmitted by environmenal elements such as sunshine and dirty *** both settings,the care-seeking pathways were found to be strongly influenced by local c

关键词： Community knowledge Healthcare-seeking behaviour Schistosomiasis Korhogo Kaedi Côte d’Ivoire Mauritania