检索结果-南通市图书馆

Characterization and Influence of Nanofiber Flours of Wood Modified on Fresh State Properties of Cement Based Mortars

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2019年第6期7卷 557-566页

作者： Fadhel Aloulou sabrine Alila LabEM-LR11ES34:Laboratory of Energy and Materials University of SousseTunisia Laboratoire Sciences des Matériaux et Environneme nt University of SfaxTunisia

Nanofibrillated wood fiber was used as fillers in the partial cement matrix replacing the cement to a content of up to 2%by weight of *** nanofibrillated effect of wood fibers on porosity,thermal properties and compressive strength was *** results obtained showed an improvement in compressive strength of more than 40%with 1%by weight of wood fiber *** addition of nanofibrillated wood fiber shows a good pore reduction,and the best result was obtained with emulsion of a mixture incorporating 1%by weight of wood fiber nanofibrillate in the presence of an anionic surfactant(SDBS).Thermal conductivity measurements and thermal expansion coefficient,compared to nanofibrillated wood fiber reinforced cement pastes,showed the reinforcing efficiency of cellulose fiber *** degree of hydration of the cement increased with nanofibrillated wood *** property has been confirmed by Fourier transform infrared *** analyzes revealed that the presence of nanofibrillated wood fibers generates and promotes the hydration of the cement,producing more portlandite and calcium silicate gel,which influences the compressive strength which gives a strong improvement.

关键词： Cement nano-fiber flour nano-fiber wood modified adjuvant surfactant emulsion

Influence and Dispersion of Nanofiber of Wood Modified on Properties of Cement Based Mortars

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2019年第7期7卷 631-641页

作者： Fadhel Aloulou Alila sabrine Habib Sammouda LabEM-LR11ES34:Laboratory of Energy and Materials University of SousseTunisia LMSE:Laboratoire Sciences des Matériaux et Environnement University of SfaxTunisia

Wood nanofibers from industrial waste have been used as polymeric material to reinforce the cement paste to a content of up to 2%by weight of *** effect of the wood nanofibre content on the porosity,the compressive strength and the degree of hydration of the cement was *** results showed an improvement in compressive strength of over 50%with 1%of added *** modification of nanofiber wood by grafting alkyl chains to their surface can reduce the amount of water absorbed by the *** of an anionic additive(SDBS)to the mixing water improves the surface of the samples more and more by minimizing the pore size by emulsion effect,hence the water absorption *** degree of hydration of the cement increased with the cellulose content containing *** analysis revealed that the presence of nanofibers favored the hydration of the cement by producing more calcium silicate gel and portlandite,probably the main reason for this improvement in compressive strength.

关键词： Cement nano-fiber wood modified adjuvant,surfactant emulsion

Stabilization and Evaluation of Modified Nanofiber Flour Wood on the Properties of Cement-Baszd Mortar

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2019年第8期7卷 763-774页

作者： Fadhel Aloulou sabrine Alila Habib Sammouda Laboratory of Energy and Materials(LabEM):LR11ES34 Higher School of Science and Technology of Hammam SousseUniversity of SousseSousseTunisia Laboratoire Sciences des Matériaux et Environnement:LMSE Facultédes Sciences de SfaxUniversity of SfaxSfaxTunisia

The influence of nanofiberwood on the properties of the fresh condition of cement based mortars is not known in detail,despite recent advances in nanocellulose technology and it is related composite *** wood from industrial waste,produced by high-pressure homogenization,was used as cement partial replacement for cement paste at a content ranging from 0%to 2%by weight of *** effect of the nanofiber wood content on the porosity,the compressive strength and the degree of hydration of the cement was *** have shown an improvement in the compressive strength by more than 50%with 1%of added fiber *** chemical modification of nanofibers wood by grafting of chains alkyls in their surfaces can reduce the quantity of water absorbed by the *** addition of an anionic additive(SDBS)in the water of mixing improves of more the surface of samples by minimizing the size of pores by emulsion effect,from where the absorption of water *** degree of hydration of the cement has increased with the cellulose content containing *** analyze revealed that the presence of nanofiber wood favored the hydration of the cement by producing more calcium silicate gel and portlandite,probably the main reason for this improvement in compressive strength.

关键词： Cement nano-fiber adjuvant surfactant emulsion hydratation thermal conductivity

Evaluation of Application Possibilities for Packaging Technologies in Canonical Workflows

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Data Intelligence 2022年第2期4卷 372-385页

作者： Thomas Jejkal sabrine Chelbi Andreas Pfeil Peter Wittenburg Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 176344 Eggenstein-LeopoldshafenGermany Max Planck Computing and Data Facility GieBenbachstraBe 285748 GarchingGermany

InCanonicalWorkflowFramework forResearch(CWFR)"packages"arerelevantin *** data science,workflows are in general being executed on a set of files which have been aggregated for specific purposes,such as for training a model in deep *** call this type of"package"a data collection and its aggregation and metadata description is motivated by research *** other type of"packages"relevant for CWFR are supposed to represent workflows in a self-describing and self-contained way for later *** this paper,we will review different packaging technologies and investigate their usability in the context of *** this purpose,we draw on an exemplary use case and show how packaging technologies can support its *** conclude that packaging technologies of different flavors help on providing inputs and outputs for workflow steps in a machine-readable way,as well as on representing a workflow and all its artifacts in a self-describing and self-contained way.

关键词： Canonical Workflow Framework for Research Packaging technologies Research data collections Packaging formats

Photosynthesis and growth responses of pea Pisum sativum L. under heavy metals stress

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2009年第11期21卷 1552-1556页

作者： sabrine Hattab Boutheina Dridi Lassad Chouba Mohamed Ben Kheder Hamadi Bousetta Laboratory of Biochemistry and Environmental Toxicology Laboratory of Marine Biology National Institute of Sea Sciences and Technologies Lagoulette Technical Centre of Organic Agriculture

The present work aimed to study the physiological effects of cadmium （Cd） and copper （Cu） in pea （Pisum sativum）. Pea plants were exposed to increasing doses of cadmium chloride （CdCl2） and copper chloride （CuCl2） for 20 d. The examined parameters, namely root and shoot lengths, the concentration of photosynthetic pigments and the rate of photosynthesis were affected by the treatments especially with high metals concentrations. The analysis of heavy metals accumulation shows that leaves significantly accumulate cadmium for all the tested concentrations. However, copper was significantly accumulated only with the highest tested dose. This may explain the higher inhibitory effects of cadmium on photosynthesis and growth in pea plants. These results are valuable for understanding the biological consequences of heavy metals contamination particularly in soils devoted to organic agriculture.

关键词： Pisum sativum heavy metals photosynthesis growth

Some Generalized Clifford-Jacobi Polynomials and Associated Spheroidal Wavelets

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis in Theory and Applications 2022年第4期38卷 394-416页

作者： sabrine Arfaoui Anouar Ben Mabrouk Algebra Number Theory and Nonlinear Analysis Laboratory LR18ES15Department of MathematicsFaculty of SciencesMonastir 5000Tunisia Department of Mathematics Higher Institute of Applied Mathematics and Computer ScienceStreet of Assad Ibn AlfouratKairouan University3100 Kairouan Tunisia Department of Mathematics Faculty of SciencesUniversity of TabukSaudi Arabia

In the present paper,by extending some fractional calculus to the framework of Clifford analysis,new classes of wavelet functions are ***,some classes of monogenic polynomials are provided based on 2-parameters weight functions which extend the classical Jacobi ones in the context of Clifford *** discovered polynomial sets are next applied to introduce new wavelet *** formula as well as Fourier-Plancherel rules have been *** main tool reposes on the extension of fractional derivatives,fractional integrals and fractional Fourier transforms to Clifford analysis.

关键词： Continuous wavelet transform Clifford analysis Clifford Fourier transform Fourier-plancherel fractional Fourier transform fractional derivatives fractional integrals fractional Clifford Fourier transform Monogenic functions.

Study of a Generalized Nonlinear Euler-Poisson-Darboux System:Numerical and Bessel Based Solutions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Partial Differential Equations 2020年第4期33卷 313-340页

作者： RIADH Chteoui sabrine Arfaoui ANOUAR Ben Mabrouk Laboratory of Algebra Number Theory and Nonlinear Analysis LR15ES18Department of MathematicsFaculty of Sciences5019 Monastir.Tunisia Department of Mathematics Higher Institute of Applied Mathematics and Computer ScienceUniversity of KairouanStreet of Assad Ibn Al-FouratKairouan 3100Tunisia Department of Mathematics Faculty of SciencesUniversity of TabukKSA

In this paper a nonlinear Euler-Poisson-Darboux system is *** a first part,we proved the genericity of the hypergeometric functions in the development of exact solutions for such a system in some special cases leading to Bessel type differential ***,a finite difference scheme in two-dimensional case has been *** continuous system is transformed into an algebraic quasi linear discrete one leading to generalized Lyapunov-Sylvester *** discrete algebraic system is proved to be uniquely solvable,stable and convergent based on Lyapunov criterion of stability and Lax-Richtmyer equivalence theorem for the convergence.A numerical example has been provided at the end to illustrate the efficiency of the numerical scheme developed in section *** present method is thus proved to be more accurate than existing ones and lead to faster algorithms.

关键词： Finite difference method Lyapunov-Sylvester operators generalized Euler-Poisson-Darboux equation hyperbolic equation Lauricella hypergeometric functions

Three siblings with gyrate atrophy of the choroid and retina:a case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2023年第12期16卷 2133-2135页

作者： maamouri Rym Ferchichi Molka Ben Chehida Amel Hadj-Taieb Sameh Cheour Monia Department of Ophthalmology Habib Thameur HospitalTunis 1069Tunisia Department of Pediatrics Rabta HospitalTunis 1007Tunisia Laboratory of Biochemistry Rabta HospitalTunis 1007Tunisia University of Tunis El Manar Faculty of Medicine of Tunis 1068Tunisia

Dear Editor,We report the cases of three siblings with gyrate atrophy(GA)of the choroid and retina with foveoschisis,anterior subcapsular cataracts,and capsular bag *** is a rare autosomal recessive degenerative disorder of the choroid and *** one-third of all reported cases are from Finland where the incidence is estimated to be around 1:50000 whereas the theoretical global incidence is only 1:1500000[1].

关键词： atrophy cases cataract

Acute peritonitis secondary to post-traumatic appendicitis:A case report and literature review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界临床病例杂志 2023年第27期11卷 6491-6497页

作者： Ghada Habachi Bochra Aziza sabrine Ben-Ammar Oussama Maherzi Yasmine Houas Yosra Kerkeni Sondes Sahli Riadh Jouini Department of Pediatric Surgery A The Béchir-Hamza Children’s HospitalTunis 1029Tunisia

BACKGROUND Blunt abdominal trauma has rarely been reported as a cause of acute appendicitis in the ***,the coexistence of the two conditions can cause issues for the *** present here a systematic review of cases of traumatic appendicitis as well as our own experience with a 12-year-old male *** SUMMARY A 12-year-old male was admitted 3 d after abdominal trauma,experiencing peritoneal syndrome.A pelvic formation was discovered during abdominal ultrasound,and surgical exploration revealed a perforated appendix.A literature review was conducted applying the keywords“appendicitis,”“abdominal,”and“trauma”to the PubMed,Embase,and Medline *** initial search included 529 papers published between 1991 and 2022,of which 33 papers were finally *** revealed 51 reported *** trauma mechanisms included road traffic accidents,falls,assaults,ball accidents,a horse kick,and a *** patients underwent surgical exploration with no prior radiological investigation,and twenty-six patients underwent an initial radiological *** reports indicated a perforated *** Acute traumatic appendicitis represents a diagnostic quandary that can be misdiagnosed resulting in significant morbidity and potential mortality.A high level of suspicion combined with radiological examination may aid in the diagnosis and treatment of this condition.

关键词： Appendicitis Abdominal Trauma Pediatric Surgery Case report