Materials Literature
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As polymer matrix composites are quickly becoming a viable alternative in civil applications where accurate structural design is quite complex, a good understanding of the behaviour of such materials is necessary. In any civil application, both environmental and design conditions need to be assessed and depending on t…
ÖZET : Bu araştırmada İğdır Ovası tuzlu-sodyumlu topraklarının bazı fizikselve kimyasal özelliklerin agregasyon üzerine etkileri incelenmiştir, İğdır ovasınıtemsilen 30 adet yüzey toprağı (0-30 cm) alınmış ve araştırma materyali olarakdeğerlendirilmiştir.Araştırma topraklarında agregasyonla; kil, porozite, elekriksel…
The low temperature water gas shift activities of Au-CeO2/Al2O3 catalysts were studied in this work. The catalysts were prepared by impregnation of CeO2 on alumina support followed by the homogeneous deposition precipitation of Au on CeO2/Al2O3. The catalysts were tested in a microflow reaction system. It was found th…
We present Monte Carlo based calculations of electron transport in InAs, AlAs and InAlAs based devices. The calculations are performed using a three valleys ensemble Monte Carlo model that includes numerical formulations of the phonon scattering rates and ionized impurity scattering rates. Calculations are made for th…
The aim of performed research was to investigate textile materials bending rigidity parameters BKESF and BFAST definedat low-stress loads by KES-F (Kawabata Evaluation System for Fabrics) and FAST (Fabric Assurance by SimpleTesting) testers, respectively and to set the relationship between these two bending rigidity p…
The Claus process has been known and used in the industry for over 100 years. It involves thermal oxidation of hydrogen sulfide and its reaction with sulfur dioxide to form sulfur and water vapor. This process is equilibrium-limited and usually achieves efficiencies in the range of 94-97%, which have been regarded as…
In previous studies on a rat model of transient cerebral ischemia, the blood and brain concentrations of gadolinium-diethylenetriaminepentaacetic acid (Gd-DTPA) following intravenous bolus injection were repeatedly assessed by dynamic contrast-enhanced (DCE)-MRI, and blood-to-brain influx rate constants (K(i)) were ca…
The processes of tumor invasion and metastasis have been well characterized at the molecular level, and numerous biomarkers of tumor aggressiveness have been discovered. Molecular imaging offers the opportunity to depict specific cell markers relevant to tumor aggressiveness. Here, we describe the role of MRI in ident…
Ultrasonic cavitation induced degradation of Congo red in aqueous solution was investigated for a variety of operating conditions. It is found that the degradation of Congo red in aqueous solution follows pseudo-first-order reaction kinetics and the degradation rate is dependent on the initial concentration of Congo r…
Hierarchical analysis of the fracture toughness enhancement of carbon nanotube- (CNT-) reinforced hard matrix composites is carried out on the basis of shear-lag theory and facture mechanics. It is found that stronger CNT/matrix interfaces cannot definitely lead to the better fracture toughness of these composites, an…
Intrinsically conductive polymers have achieved demanding interest in the field of corrosion control coatings owing to their conductive ability and also due to the strict environmental regulations on conventional heavy metals coatings. This multipurpose class of polymers has shown to be effective and proven themselves…
The sol-gel method was used to synthesize nickel-alumina catalysts with various nickel loadings. Chemical and physical properties of support and supported nickel were characterized by TGA, DTA, EDX, SEM, BET, XRD and TPR techniques. Calcination temperature (500°C) was determined by performing thermogravimetric and dif…
We studied nanoprecipitates and defects in p-type filled skutterudite CeFe4Sb12 prepared by non-equilibrium melt-spinning plus spark plasma sintering method using transmission electron microscopy. Nanoprecipitates with mostly spherical shapes and different sizes (from several nm to several tens of nm) have been observ…
Using first-principles calculations, we explore the possibility of functionalized graphene as high performance two-dimensional spintronics device. Graphene functionalized with O on one side and H on the other side in the chair conformation is found to be a ferromagnetic metal with a spin-filter efficiency up to 85% at…
The luminescence properties of Bi-doped silica fibres in the near-infrared region are discussed. Bi-doped fibre lasers and amplifiers and their dependence on the unsaturable loss and excited state absorption are also discussed.
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黏质沙雷菌是引起肠道外感染的重要病原菌,与许多院内感染的暴发流行有关,可引起肺炎、败血症和术后感染等[1].碳青霉烯类药物对产ESBL和AmpC酶革兰阴性杆菌尤其是肠杆菌科细菌具有良好的抗菌活性,随着碳青霉烯类抗菌药物的大量使用甚至过度治疗,临床耐药菌株也已出现且检出率逐年提高,给临床治疗和控制院内感染带来新的挑战.产碳青霉烯酶是引起临床肠杆菌科细菌对碳青霉烯类药物耐药的主要原因.本研究对从我院ICU收集的3株碳青霉烯类抗菌药物耐药的黏质沙雷菌耐药机制进行分析研究。
The questions of using the concepts and methods of nanoscopic research in soil science are considered. These include the concept of nanoscopic particles, fundamental features of nanoscopic substances, genesis and geography of a large number of minerals with pronounced nanoscopic properties in soils. A number of regula…
在涂有中间层SnO2-Sb2O5的Ti基体上,采用阳极复合电沉积法制备了Ti/SnO2-Sb2O5/PbO2＋nano-Co3O4复合电极材料,利用X射线衍射（XRD）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）等方法研究了制备条件对该复合电极材料组成、结构和形貌的影响.结果表明,纳米Co3O4的掺杂可提高PbO2电极表面的粗糙度和空隙率;沉积电位、镀液中Co3O4粒子浓度及有机溶剂的添加等均对镀层中Co3O4的嵌入量有较大影响.
利用真空Kelvin探针力显微镜（KFM）研究了纳米尺度下n-AlGaN/GaN薄膜的表面电荷性质并进行了定量测量.结果表明,n-AlGaN/GaN薄膜的表面位错均为电活性的受主型表面态,所捕获电荷的区域远远大于表面位错的大小,其表面电势与GaN薄膜表面电势的最大差值达到590 mV.在光照下,n-AlGaN/GaN薄膜的表面电荷发生了明显的光生电荷重新分布现象.