scholarly journals Nanotone spatial dissipative structures with rotational curving of the grid around three mutually perpendicular directions

2019 ◽  
Vol 488 (6) ◽  
pp. 619-623
Author(s):  
V. B. Маlkov ◽  
G. P. Shveikin ◽  
S. V. Plaksin ◽  
V. G. Pushin ◽  
А. V. Маlkov ◽  
...  
Keyword(s):  
Amorphous Film ◽  
Lower Surface ◽  
Dissipative Structures ◽  
Amorphous Selenium ◽  
Lattice Rotation ◽  
Microscopic Image ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Electron Microscopic Image ◽  
Rotational Curvature

Transmission electron microscopy and microdiffraction have been used to investigate nanothin spatial dissipative structures (SDS) obtained by thermogradient processing of an amorphous selenium film by one-sided heating of its lower surface at T = 413 K. It has been established that the obtained nanothin SDS of hexagonal selenium possess a specific curved habit and a nonlinear fan-shaped system of bending contours in their electron-microscopic image; the lattice of nanothin SDS undergoes an elastic-plastic rotational curvature around three mutually perpendicular directions; the lattice rotation angles of nanothin SDS hexagonal selenium reach: around [001], 25, around the direction perpendicular to [001] and lying in the plane of the amorphous film 32, around the direction perpendicular to the first two and not lying in the plane of the amorphous film 35.

scholarly journals Correlating Fluorescence Microscopy with Electron Microscopy

2004 ◽  
Vol 12 (1) ◽  
pp. 3-7
Author(s):  
Stephen W. Carmichael ◽  
Jon Charlesworth
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fluorescence Microscopy ◽  
Fluorescent Probes ◽  
Cell Biology ◽  
Microscopic Image ◽  
Electron Microscopic ◽  
Transmission Electron ◽  
Electron Microscopic Image ◽  
Auto Fluorescence

The use of fluorescent probes is becoming more and more common in cell biology. It would be useful if we were able to correlate a fluorescent structure with an electron microscopic image. The ability to definitively identify a fluorescent organelle would be very valuable. Recently, Ying Ren, Michael Kruhlak, and David Bazett-Jones devised a clever technique to correlate a structure visualized in the light microscope, even a fluorescing cell, with transmission electron microscopy (TEM).Two keys to the technique of Ren et al are the use of grids (as used in the TEM) with widely spaced grid bars and the use of Quetol as the embedding resin. The grids allow for cells to be identified between the grid bars, and in turn the bars are used to keep the cell of interest in register throughout the processing for TEM. Quetol resin was used for embedding because of its low auto fluorescence and sectioning properties. The resin also becomes soft and can be cut and easily peeled from glass coverslips when heated to 70°C.

ELECTRON MICROSCOPY OF QUASICRYSTALS AND THE VALIDITY OF THE TILING APPROACH

1993 ◽  
Vol 07 (06n07) ◽  
pp. 1387-1413 ◽  
Author(s):  
H.-U. NISSEN ◽  
C. BEELI
Keyword(s):  
Image Contrast ◽  
Microscopic Image ◽  
Electron Microscopic ◽  
Structural Interpretation ◽  
Random Tiling ◽  
Transmission Electron ◽  
Transmission Electron Microscopic ◽  
Electron Microscopic Image ◽  
Microscopic Studies ◽  
Quasicrystal Structure

A review is presented of high-resolution transmission electron microscopic studies on icosahedral, decagonal and dodecagonal quasicrystals executed during the last eight years, especially at ETH Zürich, with special consideration of the use made of tilings for the interpretation of the electron microscopic image contrast. Since the contrast contains information on the projected potential of the quasicrystal structure, the local details of decorated and undecorated tilings can be correlated to the image contrast. These tilings can even be superimposed directly onto the micrographs as an aid in structural interpretation. Also, tilings can directly be constructed by computer on the basis of contrast maxima or minima appearing in the image. These tilings serve to differentiate between quasiperiodic tiling and random tiling quasicrystal structures. Examples of the successful application of these types of tilings in the structural interpretation of electron microscopic observations on quasicrystal alloys are presented.

Role of interfacial interactions to control the extent of wrapping of polymer chains on multi-walled carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42334-42346 ◽  
Author(s):  
Suchitra Parija ◽  
Arup R. Bhattacharyya
Keyword(s):  
Polymer Chains ◽  
Electron Microscopic ◽  
Α Phase ◽  
Transmission Electron ◽  
Transmission Electron Microscopic ◽  
Electron Microscopic Image ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Transmission Electron Microscopic Image

Transmission electron microscopic image of separated MWCNTs (N51L15G5) showing the wrapped polymer chains on the MWCNTs surface, which corresponds to the α-phase of the PP.

An Efficient Adaptive Algorithm for Electron Microscopic Image Enhancement and Feature Extraction

2019 ◽  
Vol 9 (1) ◽  
pp. 1-16
Author(s):  
Vivek Arya ◽  
Vipul Sharma ◽  
Garima Arya
Keyword(s):  
Feature Extraction ◽  
Contrast Enhancement ◽  
Block Size ◽  
Sigmoid Function ◽  
Microscopic Image ◽  
Electron Microscopic ◽  
Microscopic Images ◽  
Electron Microscopic Image ◽  
Block Based

In this article, a block-based adaptive contrast enhancement algorithm has been proposed, which uses a modified sigmoid function for the enhancement and features extraction of electron microscopic images. The algorithm is based on a modified sigmoid function that adapts according to the input microscopic image statistics. For feature extraction, the contrast of the image is very important and authentic property by which this article enhances the visual quality of the image. In this work, for better contrast enhancement of image, a block based on input value, combined with a modified sigmoid function that is used as contrast enhancer provides better EMF values for a smaller block size. It provides localized contrast enhancement effects adaptively which is not possible using other existing techniques. Simulation and experimental results demonstrate that the proposed technique gives better results compared to other existing techniques when applied to electron microscopic images. After the enhancement of microscopic images of actinomycetes, various important features are shown, like coil or spiral, long filament, spore and rod shape structures. The proposed algorithm works efficiently for different dark and bright microscopic images.

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