Materials Literature
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Ironmolybdenum silica mesoporous materials were obtained by the application of direct hydrothermal method. The inuence of high temperature samples reduction in the H2 ow on their structural and magnetic properties was studied. Four samples with dierent metal contents relative to silica were investigated. The study was…
Abstract The paper presents the issue of a knife proof ballistic package. This issue was emphasized since most of modern vests are designed to match the threat posed to them only by firearms. There was observed negligence of protection against melee attacks. There is, thus, a need to develop a research methodology in…
Trivalent thulium ions (Tm3+) doped GdAlO3 (Gd1-xTmxAlO3) phosphors which show a blue luminescence of high color purity have been synthesized by using solid-state reaction method starting from nanosized powders. X-ray diffraction (XRD) measurements were used to analyze the phase transformations that take place during…
In this paper, a sensor less operation of a Switched Reluctance Motor drive is proposed. Here, the commutation of switched Reluctance motor is done without the use of a position detector. A method based on the calculation of phase inductance from the flux value is used in this. It is ensured that the switching of each…
Compound [Zn(CF 3 CO 2 ) 2 (Bpp) 2 ], where Bpp is 1,3-bis(4-pyridyl)propane, was synthesized and its structure and luminescent properties were determined. Crystals are monoclinic, space group C 2/ c , a = 21.261(1) Å, b = 17.642(1) Å, c = 18.632(1) Å, β = 115.85(1)°, V = 6289.3(6) Å 3 , ρ calcd = 1.453 g/cm 3 , Z = 8…
Bu çalışmada, kutu konstrüksiyonlu mobilya “L”-tipi köşe birleştirmelerde, malzeme çeşidi ve birleştirme tekniğinin diyagonal çekme ve basınç yükleri altındaki moment taşıma kapasitesine etkilerinin belirlenmesi amaçlanmıştır. Deney örnekleri, ahşap esaslı levhalardan 18 mm kalınlığında yonga levha (YL), yönlendirilmi…
An eco-friendly and efficient one-pot synthesis of penta-substituted pyrrole derivatives via a four-component reaction of maldrum’s acid, arylglyoxal monohydrate, dimethyl but-2-yne-dioate and amines under catalyst-free conditions in an environmentally friendly medium is described. The simple experimental procedure, c…
Beams are structural elements present in most structures. In the case of materials commonly used in construction highlight the wood, being a renewable source material, low density and good mechanical performance. Structures built with wood, if not handled properly, can present problems that may impair the purposes for…
A study is carried out based on the evaluation of IEC-standard. Two measurement results on N.O. magnetic steel sheets, one from S-SST (Stress load type single sheet tester developed in our research laboratory), another is from SST based on the IEC standard regulation, are compared and discussed. As a result of the mea…
The inhibitive effect of Damssisa and Hlfabar extracts on the corrosion of zinc in aqueous solutions of 0.5 M sodium hydroxide were investigated at 30 °C by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. Potentiodynamic polarization curves indicated that Damssisa and Hlfabar…
Osama Mohamed M Sarhan,1,2 Rehab M Hussein31Department of Zoology, Faculty of Sciences, Fayoum University, Al Fayoum, Egypt; 2Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah Al-Mukarramah, Saudi Arabia; 3Department of Zoology, Faculty of Science, Cairo University, Giza, EgyptBackgroun…
Wen-tao Lin,1 Hong-lue Tan,1 Zhao-ling Duan,2 Bing Yue,1 Rui Ma,1 Guo He,2 Ting-ting Tang1 1Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China; 2State Key Laboratory o…
African wild silkmoth, Gonometa postica Walker (Lepidoptera: Lasiocampidae), were reared indoors in order to examine the influence of rearing conditions on the structure and properties of silk cocoon shells and degummed fibers by using a scanning electron microscope, an Instron tensile tester, and a thermogravimetric…
We investigate a two-orbital model for iron-based superconductors to elucidate the effect of interplay between electron correlation and Jahn-Teller electron-phonon coupling by using the dynamical mean-field theory combined with the exact diagonalization method. When the intra- and inter-orbital Coulomb interactions, U…
Improving the chemical durability and thermal stability of rare-earth doped glasses is a challenging issue. Glasses with composition (80-x)TeO2-20ZnO-1Er2O3-xAgCl (x=0, 0.5, 1, 2 and 3 mol%) were prepared by melt quenching method. The chemical durability and water resistivity of those glasses are investigated by measu…
Effect of wool / polyester blend ratio on the evenness characteristics of yarn has been studied. Yarns with two different counts have been spun from each of four different blend ratios of polyester/wool in conventional worsted processing system and thereafter evenness and imperfection properties are studied. It is obs…
In most of the cases, the friction is considered as a negative side-effect concerning energy loss following every process of the power transmission. However, the friction has significant positive side effects, because it is an indispensable prerequisite for the movement of people, machines, transportation means and ot…
Antioxidants from marine sources have been playing an important role in the present day food and cosmetic industries. Recent studies prove that chitin and chitosan derivatives have valuable biological and bioactive principles including antioxidative and radical scavenging properties. Chitooligosaccharides (COS) of 3‐5…
International audience
The theory of contact mechanics deals with stresses and deformations which arise when the surfaces of two solid bodies are brought into contact. In elastic deformation contact occurs over a finite area. A regular method for determining the dimensions of this area is Hertz Contact Model. Appearance of atomic force micr…