The gadolinium substituted nickel-zinc ferrite nanoparticles of the composition, Ni0.5Zn0.5Gd0.05Fe1.95O4 were prepared using sol-gel method. In order to study effect calcination temperature on optical parameters, powder was divided into five parts. first part taken as as-prepared sample and remaining four parts calcinated at different temperatures, 600°C, 700°C, 800°C & 900°C. X-ray diffractio...

هدف: امروزه کارگروهی در مؤسسات آموزش عالی به‌عنوان یکی از بهترین راهبردها برای تعامل و مشارکت دانشجویان فرایند یادگیری هم‌چنین کمک به رشد مهارت‌های ارتباطی آن‌ها محسوب می‌شود. درحالی‌ که شناسایی مزایای می‌تواند درک مثبتی را بین اساتید ایجاد کند، عواملی باعث عدم شکل‌گیری تمایل اندک انجام نظام دانشگاهی می‌شود، نیز مزایا تأثیرات مثبت آن بکاهد؛ بنابراین، هدف این پژوهش چالش‌های مرتبط با بود.مواد روش...

Anatase TiO2 nanocrystallines (17–29 nm) were successfully synthesized by the metal–organic chemical vapor deposition method (MOCVD). Moderate manipulation of system parameters of MOCVD can control the particle size. The electro-optical and photocatalytic properties of the synthesized TiO2 nanoparticles were studied along with several commercially available ultra-fine TiO2 particles (e.g., 3.8–...

A simulation model of light partitioning in horizontally homogeneous multispecies canopies is proposed. The model is based on the Kubelka–Munk equations (KM) applied to a mixture of N vegetation components. Only two hemispherical fluxes, i.e. downwards and upwards, are considered. The exact solution of KM equations was then simplified in such a way that the model can be easily extended to multi...

Synthesis of efficient antibacterial agents has become extremely important due to the emergence antibiotic resistant bacteria. This is especially true for Pseudomonas aeruginosa , an opportunistic pathogen having ability rapidly develop resistance multiple classes antibiotics thus limiting efficacy approved clinical use. Aluminum (Al)-doped NiO nanoparticles are special interest their enhanced ...

A desktop scanner was colorimetrically characterized to average CIELAB error of less than unity for Kodak Ektachrome transparencies and Ektacolor paper, and Fuji Photo Film Fujichrome transparencies and Fujicolor paper. Independent verification on spectrally similar materials yielded average ∆E*ab error of less than 2.1. The technique first modeled the image formation of each medium using eithe...

In the present study, binary oxide (cadmium oxide [CdO])x (zinc oxide [ZnO])1-x nanoparticles (NPs) at different concentrations of precursor in calcination temperature were prepared using thermal treatment technique. Cadmium and zinc nitrates (source of cadmium and zinc) with polyvinylpyrrolidone (capping agent) have been used to prepare (CdO)x (ZnO)1-x NPs samples. The sample was characterized...

Introduction: Fe-sulfates with OH &/or H2O are found in martian meteorites [e.g. 1] & on the martian surface [e.g. 2]. These minerals may provide evidence for past surface environments & potential habitability, [e.g. 3]. Several studies have characterized Fe-sulfates using spectral features [e.g., 4-6]. However, unique identification of Fe-sulfates is hampered by the occurrence of mineral assem...

Cu and Ni ferrites as the semiconductor materials were synthesized by a microwave sol-gel auto-combustion method. Two cationic surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), were applied and the influence of surfactants on the properties of the Cu and Ni ferrite particles was studied. The samples were characterized by X-ray powder diffraction (XRD) pattern,...