نتایج جستجو برای: scanningelectron microscopy sem

تعداد نتایج: 241086  

2014
Scott Wight

The Materials Measurement Science Division at NIST has a significant effort in support of trace contraband detection and forensic microscopy and analysis. Characterization of the particle characteristics (size, morphology, chemical composition and areal coverage) of trace contraband residues on surfaces is critical for developing optimized sampling strategies for current and emerging trace dete...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده علوم پایه 1390

abstract in this study, we synthesized a novel template polymer by using methacrylic acid (mma) as functional monomer, ethylene glycol dimethacrylate(egdma) as cross linker, 2,2-azobisisobutyronitrile (aibn) as initiator and olanzapine as targeted molecule in the presence of chloroform and acetonitrile as solvent. the products have been characterized and confirmed by (chn)elemental analysis,...

Journal: :Journal of microscopy 2015
O Kleinerman A Nicholas G Parra-Vasquez M J Green N Behabtu J Schmidt E Kesselman C C Young Y Cohen M Pasquali Y Talmon

Cryogenic electron microscopy (cryo-EM) is a powerful tool for imaging liquid and semiliquid systems. While cryogenic transmission electron microscopy (cryo-TEM) is a standard technique in many fields, cryogenic scanning electron microscopy (cryo-SEM) is still not that widely used and is far less developed. The vast majority of systems under investigation by cryo-EM involve either water or orga...

2014
K. Balkwill

The typically distinctive and elaborate external structures and sculpturing of pollen grains have been widely used in the taxonomy and systematics of the flowering plants. The family Acanthaceae is a striking example, where the widely diverse external pollen grain morphology has proved useful in determining relationships between taxa. Detailed information for external pollen wall morphology has...

Journal: :journal of nanostructures 2012
m. dadkhah m. salavati-niasari n. mir

caco3 nanoparticles have been synthesized via heat-treatment of a new precursor and solid state reaction. effect of calcinations temperature and quantity of surfactant on particle size has been investigated. the products were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electron microscopy (tem) and fourier transform infrared (ft–ir) spectroscopy.

Journal: :International Journal of Current Microbiology and Applied Sciences 2018

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