Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Instability effects caused by high‐energy γ‐irradiation are studied in (As2S3)1‐x(Sb2S3)xglasses (x=0, 0.1, 0.2 and 0.3) using positron annihilation lifetime spectroscopy, the results being treated within two‐state trapping model in both normal and high‐measurement statistics. The observed decrease in positro…
Abstract Bismuth silicate glasses containing Ba2+ ions were prepared by a normal melt quench technique in a wide range of composition. The present study includes structural and optical characterization of these glasses by using the techniques of IR and UV‐visible spectroscopy. The variation in density and molar volume…
Abstract We have investigated the optical properties of poly [2‐methoxy‐5‐(2‐ethylhexyloxy)‐1,4‐phenylene vinylene] containing oxadiazole in backbone (MEH‐OPPV) in dilute tetrahydrofuran solution and solid solution films. There is a large dihedral angle between the two adjacent monomer units in MEH‐OPPV, which restrai…
Abstract Bulk glasses of Se90Ge10‐xInx(where x = 2, 4 and 6 at.%) were prepared using a conventional rapid quenching technique. The amorphous nature and the crystalline phases of the samples annealed at 393 K for 25 h were investigated using X‐ray diffraction. Calorimetric analysis of the bulk glassy samples has been…
In present article, the anharmonic correlated Einstein model has been used to study the temperature dependence of Extended X-ray absorption fine structure (EXAFS) cumulants of silicon and germanium crystals. The analytical expressions of the first, second and third cumulants of silion and germanium have been derived.…
Усаров М.К.Задача изгиба для толстой ортотропной пластины в трехмерной постановке Задача изгиба для толстой ортотропной пластины в трехмерной постановке К.ф.-м.н., старший научный сотрудник М.К.Усаров*, Институт Механики и сейсмостойкости сооружений Академии Наук Республики Узбекистан Ключевые слова: трехмерные задачи…
Based on thermodynamic calculations a (C+N) TWIP steel with the nominal composition Fe-25Mn-12Cr-0.3C-0.4Nwas developed and produced.Casting, diffusion annealing, hot rolling and water quenching were performed leading to a fully austenitic structure without δ-ferrite or ε-martensite.Unidirectional tensile tests were p…
Origin of cottonThe Cotton plant belongs to the order of Malvales, the family Malvaceae, the tribe Hibiscus, and the genus Gossypium.There are four domesticated species of cotton of commercial importance: G. barbadense, G. hirsutum, G. arboreum and G. herbaceum.Each one of these commercially important species contains…
Abstract Al doped ZnO nanoparticles were synthesized by the sol‐gel technique. X‐ray diffraction, selected area electron diffraction, inductively coupled plasma‐atomic emission and X‐ray photoelectron spectroscopy results ruled out impurity and other phases in Zn0.97Al0.03O nanoparticles annealing at different tempera…
The design of a product or a mechanical system involves several stages, starting with the development of product specifications and ending with its final destruction. The aim of our research is to develop appropriate tools by proposing new operating methodologies and new computer tools to link up material development…
.
OBJECTIVES: The main objective of this work was to develop a suitable analytical technique for determining trace amounts of the thermodynamically stable solid form in bulk samples of metastable form, to a sensitivity of 0.005%-1.0%. Tegafur (5-fluoro-1-(tetrahydro-2-furyl)-uracil) α and β crystalline forms were used a…
The zeolite mineral goosecreekite CaAl 2 Si 6 O 16 ⋅5H 2 O has been structurally investigated between 25 and 600 °C to monitor structural modifications upon partial dehydration. Temperature-dependent in situ powder and single-crystal X‑ray techniques were combined with TG/DTA experiments. Goosecreekite has a porous fr…
Abstract Chalcopyrite α‐CuInSe2(α‐CIS) was prepared from mixed powders of Cu2Se and In2Se3by annealing in the Se‐ and the non‐Se environments. The mechanically ground powders were in an overall amorphous state. The mechanical alloying produced Cu3Se2and CuSe compounds. At relatively low temperature, Cu3Se2decomposed,…
For a large class of lattice models, we study the thermodynamic factor, $\ensuremath{\Phi}$, of the collective surface diffusion coefficient near a first-order phase transition between two phases at low temperatures. In a two-phase regime, its dependence on the coverage, $\ensuremath{\theta}$, is $\ensuremath{\Phi}\en…
Abstract Aligned ZnO nanorods were prepared using colloid‐based self‐assembling techniques to structure the gold catalyst. Two different processes were used and are compared. The ZnO nanorods were grown with diameters between 200 and 500 nm and adjustable length by a chemical vapor deposition process in a horizontal t…
Residual stresses in a stainless steel vessel containing glass have been evaluated using measurements and numerical simulation. High-level nuclear wastes are often vitrified in glass cast in cylindrical stainless steel containers. Knowledge of the internal stresses generated in both the glass and container during this…
Abstract The evolution of the structural and optical characteristics of polymorphic organic perylene nanoparticles (NPs) is demonstrated by controlling the π–π interactions using a hydrothermal process. The light‐emission colors of the perylene NPs vary gradually from yellow to green to light blue with increasing hydr…
Polymer‐mediated interaction forces between an α‐alumina particle and c‐sapphire surfaces in methylcellulose solutions were measured by the atomic force microscope colloid probe technique. The effect of water soluble methylcellulose on normal and lateral surface forces was probed to understand the binding action of me…
Despite the significant progress in the development of cancer detection, prevention, surgery, and therapy, there is still no common cure for this disease. In addition, the long-standing problem of chemotherapy is the lack of tumor-specific treatments. Traditional chemotherapy relies on the premise that rapidly prolife…