نتایج جستجو برای: uniform nano
تعداد نتایج: 161295 فیلتر نتایج به سال:
introduction: nowadays, due to mechanization of life, consumers need of food which they spent little time for preparation, so fresh cut industry is growing rapidly in the world. these products had strong growth since 1940, and in 2013, most sales of fresh cut fruit related to apples, against 21.8 percent. minimal processing operations include grading, washing, sorting, slicing, chopping and the...
Liquefaction is one of the most important and complex topics in geotechnical earthquake engineering. In recent years, passive site stabilization method has been proposed for non-disruptive mitigation of liquefaction risk at developed sites susceptible to liquefaction using colloidal nano-silica stabilizer. In this research, 4 box models were used to investigate the ability to uniformly deliver ...
A novel route to fabricate nano-fiber anode material for solid oxide fuel cells (SOFCs) is presented. Firstly, uniform nano-fibers of 8 mol % Yttria Stabilized Zirconia (8YSZ) were formed in an electrospinning process; then, these electrospun fibers were calcined at temperatures up to 1300 °C; and finally the ceramic 8YSZ nano-fibers were coated with nickel in an electroless plating process. Th...
The present paper aims to study the preparation of polyaniline nanofibers through simple interfacial polymerization. Ammonium persulfate, hydrochloric acid and chloroform were used as oxidant, dopant and organic solvent respectively. Field Emission Scanning Electron Microscopy (FESEM), X-ray diffraction and Fourier Transform Infrared Spectroscopy (FTIR) techniques were used to analyze the produ...
Aims: This study aimed to prepare and physicochemically evaluate as well assess the cytotoxicity stimulation of early osteogenic differentiation dental pulp stem cells gelatin-hydroxyapatite (Gel-HA) fibrous nanocomposite scaffold. Background: Recently, electrospinning approach in nanotechnology has been considered due its application preparation biomimetic nanofibers for tissue engineering. Ob...
جفت شدن آلدهیدها با ارتوآمینوفنول و حلقه زایی ارتوهیدروکسی آریلیدین آنیلین ها یا بازهای شیف فنولی دو روش کلاسیک برای تهیه بنزواکسازول می باشد. در این کار nano-?-al2o3/bf3-nرا به عنوان یک اسید جامد تهیه نمودیم که برای اثبات وجود اتم b در nano-?-al2o3 طیف های xrd, ft-ir نانو گاما آلومینا و نانوگاما آلومینا بورتری فلورید را به طور جداگانه بررسی نمودیم. در این کار تحقیقاتی مشتقات 2-هیدروکسی آریل-...
A new derivative of zirconium (IV), [(acac)2Zr{ONC(Me)th-2}2] have been produced by treating bis(acetylacetonato)diisopropoxy zirconium(IV) with internally functionalised oxime HONC(Me)th-2 (where th = thiophene) in 1:2 stoichiometry, while refluxing in anhydrous toluene. After drying and purification, the product appeared as offwhite crystalline solid. Physico-chemical analysis of this derivat...
We demonstrate nano-fabrication of high-aspect ratio and high-spatial frequency diffractive X-ray optics with high uniformity for use in a laser-plasma-based compact water-window X-ray microscope. The structures are fabricated on 50 nm thin Si3N4-membranes using a three-layer resist scheme and 30 keV e-beam lithography in combination with reactive ion etching and nickel electroplating. The proc...
To improve the electromagnetic characteristics of conductive nano fillers, carbon nanofibers (CNFs) with nickel-phosphorous (Ni-P) and nickeliron (Ni-Fe) have been fabricated by the electroless plating process. Observations by the electron microscopy (SEM/TEM) and element analyzer (EDS/ELLS) showed the uniform Ni-P and Ni-Fe coated CNFs. The compositions of the plating layers were about Ni-6wt%...
The main goal of this research was to compare the in vitro release rates of nano- and microcapsules of Silybum marianum extract (SME) in animal simulated gastric and intestinal medium conditions. The extract was encapsulated within sodium alginate carriers using emulsification/internal gelation method. Particle size, zeta potential, polydispersity index (PDI) and morphology of...
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