نتایج جستجو برای: heterogeneous sample

تعداد نتایج: 528257  

Journal: :Catalysts 2021

Structure–activity relations in heterogeneous catalysis can be revealed through situ and operando measurements of catalysts their active state. While hard X-ray tomography is an ideal method for non-invasive, multimodal 3D structural characterization on the micron to nm scale, performing under controlled gas temperature conditions challenging. Here, we present a flexible sample environment at s...

< p>Mg-Fe bi-metal oxide was prepared and utilized as a magnetized renewable solid base catalyst for formation of 2-aminothiophenes by means of Gewald’s reaction. The prepared heterogeneous basic solid catalyst can be separated by a magnet and reused without considerable wastage in this activity. The structure of the aforementioned magnetized basic nano-catalyst was studied by XRD (X-ray diffra...

Journal: :Forensic Science International 2021

Over the past years, next-generation sequencing (NGS) technologies revolutionized possibilities in a broad range of application areas. Also field forensic genetics, NGS continuously gained importance and attentiveness. A significant number sudden cardiac deaths (SCD) young is due to heritable arrhythmia syndromes emphasizing need examining genetic basis these cases also with regard identificati...

Journal: :Iet Radar Sonar and Navigation 2021

To improve the clutter suppression performance of airborne radar in heterogeneous environment, a robust refined training sample reweighting space–time adaptive processing (STAP) method called RRSRW is proposed here. First, some target-free samples around cell under test (CUT) are selected and corresponding dictionary matrices constructed using system parameters. Then, patch amplitudes array err...

A magnetically recoverable catalyst consisting of Mn (III) salophen complex was prepared. The synthesized catalyst was characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and Fourier transform infrared (FT-IR). The immobilized catalyst was shown to be an ef...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1392

a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...

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