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نتایج جستجو برای Scanning Electron Microscopy

تعداد نتایج: 333935  
Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Ding-Shyue Yang, Omar F Mohammed, Ahmed H Zewail,

Progress has been made in the development of four-dimensional ultrafast electron microscopy, which enables space-time imaging of structural dynamics in the condensed phase. In ultrafast electron microscopy, the electrons are accelerated, typically to 200 keV, and the microscope operates in the transmission mode. Here, we report the development of scanning ultrafast electron microscopy using a f...

Journal: :Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Intervention 2013
Raphael Sznitman, Aurélien Lucchi, Marco Cantoni, Graham Knott, Pascal Fua,

Scanning Electron Microscopy (SEM) is an invaluable tool for biologists and neuroscientists to study brain structure at the intracellular level. While able to image tissue samples with up to 5 nm isotropic resolution, image acquisition is prohibitively slow and limits the size of processed samples. In this work, we propose a novel approach to speeding up imaging when looking for specific struct...

2010
Toshiro SAKAE, Hirotsugu YAMAMOTO, Goro HIRAI,

Dental calculus, a type of stone formed even under normal conditions, plays an important role in some periodontal diseases. Deposition of dental calculus follows plaque formation, and the variations in the degree of calcification reflect the changes in environment and form of its lamellar structure[1]. Dental plaque is composed of rods, cocci and filamentous bacteria[2], and these morphological...

2003
A. POLLIACK, N. LAMPEN, B. D. CLARKSON, E. DE HARVEN, Z. BENTWICH, F. P. SIEGAL, H. G. KUNKEL,

I t is now generally accepted that two distinct classes of lymphocytes are present in different species including man--thymus-derived (T) cells and bone marrow or bursalderived (B) cells (1, 2). Although similar in appearance these two cell types have been demonstrated to have widely different functions. They can be distinguished electrophoretically by their different mobility (3, 4), serologic...

Journal: :Neotropical entomology 2006
Ednéia F B Torquato, Marcílio H de Miranda Neto, Rose M C Brancalhão, Valdeni S Franco,

A simplified methodology was developed to study the geometric form of multiple Bombyx mori Nucleopolyhedrovirus by scanning electron microscopy. The virus belongs to Baculoviridae family and was isolated from the silkworm Bombyx mori (L.) (Lepidoptera: Bombycidae). The polyhedra of Nucleopolyhedrovirus were obtained from the filtrate, inoculum and hemolymph of the silkworm experimentally infect...

2006
Richard Markuszewski,

The value of t he scanning e lec t ron microscopy i n p rov id ing i n s i t u i n fo rma t ion on t h e microst ructure o f ma te r ia l s such as coal I s we l l known. m a r t i c u l a r l y su i ted for examining the f i n e l y d i s t r i b u t e d mineral p a r t i c l e s found i n f ine ly-ground coal. data can be provided. c a l analysis t o be performed on these minute features, thu...

2003
J. WAISBREN, DAVID J. HURLEY, BURTON A. WAISBREN,

The strain of P. aeruginosa used was a Fisher serotype 3,7, originally isolated from a patient with severe burns. The susceptibility of the strain to antibiotics used singly and in combination was determined by the tube dilution method (12). Minimal inhibitory concentrations (MICs) were determined by observing the lowest dilution of antibiotic that prevented visible growth of an inoculum of 105...

2007
Weilie Zhou, Robert P. Apkarian, Zhong Lin Wang, David Joy,

The scanning electron microscope (SEM) is one of the most versatile instruments available for the examination and analysis of the microstructure morphology and chemical composition characterizations. It is necessary to know the basic principles of light optics in order to understand the fundamentals of electron microscopy. The unaided eye can discriminate objects subtending about 1/60 ̊ visual a...

Journal: Mycologia Iranica 2016

In the present study, pathogenicity of four native strains of Entomopathogenic fungus; Metarhizium anisopliae, was studied against adult stage of Ixodes ricinus. For this purpose a total number of 180 adult ticks were examined in triplicate. Thirty ticks for each strain and negative and positive controls were immersed in 2.4×107 fungal conidia/ml in vitro. Samples were incubated in separate Pet...