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Synthesis, crystal structure and characterization of a new octane-1,8-diammonium bis(dihydrogenmonophosphate)

Open Journal of Inorganic Chemistry 2011年第1期1卷 1-8页

作者： Mohamed Lahbib Mrad Salah Ammar Valeria Ferretti Mohamed Rzaigui Cherif ben nasr 不详

The synthesis and the structure of a new [H3N-(CH2)8-NH3][H2PO4]2 is described. This compound crystallizes in the orthorhombic system, with the centric space group Pbcn and the following unit cell parameters: a = 7.2887 (4), b = 9.1728 (6), c = 23.2169 (19) ?, Z = 4 and V = 1552.23 (18) ?3. The crystal structure has been solved and refined to R = 0.074 and R(w) = 0.173. The [H2PO4]- entities are associated by O---H...O strong hydrogen bonds to form layers. These latters are interconnected with the organic entities via (N)-H...O hydrogen bonds. In this atomic arrangement, H bonds between the different species play an important role in the three-dimensional network. This compound has also been characterized by infrared spectroscopy, solid state MAS-NMR and thermal analysis.

关键词： X-ray Diffraction NMR Spectroscopy IR Spectroscopy ATG

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Analytical Study of a Heat Recovery/Desiccant Cooling System under Tunisian Climatic Conditions

Analytical Study of a Heat Recovery/Desiccant Cooling System...

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作者： Seifennasr Sabek Kaouther ben nasr Ridha Chouikh Amenallah Guizani the Centre des Recherches et des Technologies de l’Energie (CRTEn) the Ecole Nationale d’Architecture et d’Urbanisme the Institut Supérieur de Mathématiques Appliquées et d’ Informatique (ISMAI)

The solar potential energy in Tunisia can be used like a principal factor for the operation of new technologies of air *** could be carried out like approaches of simulation,analyzes experimental or both *** this paper,we present an analytical solution of heat and mass transfer processes in regenerator and air conditioning system(ACS) cores of a heat recovery/desiccant cooling system(HRDCS) under Tunisia weather *** programs were carried out to test the principal components of the HRDC *** results show that the coefficient of performance of system improves when we use the renewable energy for heating and *** study is significant and effective to prove the efficiency of such HRDC systems in this country.

关键词： Air conditioning liquid desiccant cooling system simulations Tunisian climatic conditions

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Engineering hierarchical heterostructure material based on metal-organic frameworks and cotton fiber for high-efficient microwave absorber

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Nano Research 2022年第8期15卷 6841-6850页

作者： Yan Guo Hu Liu Dedong Wang Zeinhom M.El-Bahy Jalal T.Althakafy Hala M.Abo-Dief Zhanhu Guo ben Bin Xu Chuntai Liu Changyu Shen Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMecca 21955Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Integrated Composites Laboratory(ICL) Department of Chemical&Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Department of Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon TyneNE18STUK

Rational construction of hierarchical multi-component materials with abundant heterostructure is evolving as a promising strategy to achieve excellent metal-organic frameworks(MOFs)based electromagnetic wave(EMW)***,hierarchical heterostructure WS_(2)/CoS_(2)@carbonized cotton fiber(CCF)was fabricated using the ZIF-67 MOFs nanosheets anchored cotton fiber(ZIF-67@CF)as a precursor through the tungsten etching,sulfurization,and carbonization *** from the synergetic effect of dielectric-magnetic dual-loss mechanism,the hierarchical heterostructure and multicomponent of WS_(2)/CoS_(2)@CCF also display improved impedance ***,numerous W-S-Co bands and heterojunction interfaces of heterogeneous WS_(2)/CoS_(2)are beneficial to promoting additional interfacial/dipole polarization loss and conductive loss,thereby enhancing the EMW attenuation *** on the percolation theory,a good balance between impedance matching and EMW absorption capacity was achieved for the WS_(2)/CoS_(2)@CCF/paraffin composite with 20 wt.%filler loading,exhibiting strong EMW absorption capability with a minimum reflection loss(RLmin)value of−51.26 dB at 17.36 GHz with 2 mm thickness and a maximum effective absorption bandwidth(EABmax)as wide as 6.72 *** research will provide new guidance for designing high-efficient MOFs derived EMW absorbers.

关键词： hierarchical heterostructure sulfurization metal-organic framework microwave absorber

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Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

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Nano-Micro Letters 2022年第7期14卷 209-227页

作者： Duo Pan Gui Yang Hala MAbo-Dief Jingwen Dong Fengmei Su Chuntai Liu Yifan Li ben Bin Xu Vignesh Murugadoss Nithesh Naik Salah MEl-Bahy Zeinhom MEl-Bahy Minan Huang Zhanhu Guo Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon Tyne NE18STUK Integrated Composites Laboratory(ICL) Department of Chemical and Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Advanced Materials Division Engineered Multifunctional Composites(EMC)Nanotech LLCKnoxvilleTN 37934USA College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Mechanical and Manufacturing Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka 576104India Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Al-Azhar UniversityNasr CityCairo 11884Egypt

With the innovation of microelectronics technology, the heat dissipation problem inside the device will face a severe test. In this work, cellulose aerogel(CA) with highly enhanced thermal conductivity(TC) in vertical planes was successfully obtained by constructing a vertically aligned silicon carbide nanowires(SiC NWs)/boron nitride(BN) network via the ice template-assisted strategy. The unique network structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W m^(-1) K^(-1) at a low hybrid filler loading of 16.69 wt%, which was increased by 890% compared to pure epoxy(EP). In addition, relying on unique porous network structure of CA, EP-based composite also showed higher TC than other comparative samples in the horizontal direction. Meanwhile, the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35 × 10^(11) Ω cm and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of-21.5 dB and a wide effective absorption bandwidth(<-10 dB) from 8.8 to 11.6 GHz. Therefore, this work provides a new strategy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications.

关键词： Epoxy Ice template Vertical alignment Thermal conductivity Multifunctionality

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Beach erosion along the coastline of Alexandria, Egypt

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Acta Oceanologica Sinica 1994年第2期13卷 243-251页

作者： Omran E. Frihy,Samir M.nasr,Khalid Dewidar and Mohamed El Raey

Long-term varations in beach width of Alexandria Governorate have ben analyzed using two sets of aerial photos taken in 1955 and 1983. The analysis reveals that a major part of most beaches has been subjecded to coastal erosion except for only beaches. The esthated long-term rate of erosion is approximately 0. 20 m/*** Maamoura, located east of Alexandria is selected to evaluate seasonal vacations. Sand volume lOsses are found to be 450 m3/ (m. a) for the entire beach length (1. 2 km). The annual sand transport by wind is estimated as about 37.7 m3. Subtracting this amount of sand from the net sand loss 450 m3/ (cm. a) yields 412.3 m3/(cm. a) of eroded sand caused by the action of currents and waves.

关键词： Beach erosion along the coastline of Alexandria Egypt

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阿尔法拉比为何被伊斯兰思想哲学界称作“第二导师”

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北方民族大学学报（哲学社会科学版） 2010年第2期 107-110页

作者：赛义德.侯赛因.纳斯尔任军译宁夏大学政法学院宁夏银川750021

自古至今,伊斯兰思想界对法拉比为何被称作"第二导师"这一问题有各种不同的阐释。纳斯尔教授认为法拉比是用逻辑学系统化陈述的方法对诸学科进行处理的奠基者,他建立起"理性"与"信仰"之间,即哲学与宗教之间的和谐。法拉比在伊斯兰传统... 详细信息

自古至今,伊斯兰思想界对法拉比为何被称作"第二导师"这一问题有各种不同的阐释。纳斯尔教授认为法拉比是用逻辑学系统化陈述的方法对诸学科进行处理的奠基者,他建立起"理性"与"信仰"之间,即哲学与宗教之间的和谐。法拉比在伊斯兰传统中所做的工作有如亚里士多德在希腊传统中所做的工作,故被称为"第二导师"。

关键词：法拉比亚里士多德第二导师

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Explaining the increased mortality in type 1 diabetes

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World Journal of Diabetes 2015年第7期6卷 889-895页

作者： Chiara Mameli Sara Mazzantini Moufida ben nasr Paolo Fiorina Andrea E Scaramuzza Gian Vincenzo Zuccotti Department of Pediatrics "Ospedale dei Bambini V.Buzzi"University of Milan Division of Nephrology Boston Children’s HospitalHarvard Medical School Transplant Medicine Ospedale San Raffaele20132 MilanoItaly Department of Pediatrics Azienda Ospedaliera Luigi SaccoUniversity of Milan

Despite large improvements in the management of glucose levels and in the treatment of cardiovascular risk factors,the mortality rate in individuals with type 1 diabetes(T1D) is still ***,Lind et al found that T1 D individuals with glycated hemoglobin levels of 6.9% or lower had a risk of death from any cause or from cardiovascular causes that is twice as high as the risk for matched controls.T1 D is a chronic disease with an early onset(e.g.,pediatric age) and thus in order to establish a clear correlation between death rate and the glycometabolic control,the whole history of glycemic control should be considered; particularly in the early years of *** switch from a normoto hyperglycemic milieu in an individual with T1 D in the pediatric age,represents a stressful event that may impact outcomes and death rate many years *** this paper we will discuss the aforementioned issues,and offer our view on these findings,paying a particular attention to the several alterations occurring in the earliest phases of T1 D and to the many factors that may be associated with the chronic history of T1 *** may help us to better understand the recently published death rate data and to develop future innovative and effective preventive strategies.

关键词： Type 1 diabetes Hyperglycemia Deathrates Adolescence Autonomic neuropathy Children Endothelial dysfunction Exercise Metabolic memory

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