Additivity rule for electron-molecule cross section calculation: A geometrical approach

1999 ◽  
Vol 257 (1-2) ◽  
pp. 75-82 ◽  
Author(s):  
Antonio Zecca ◽  
Raffaele Melissa ◽  
Roberto S. Brusa ◽  
Grzegorz P. Karwasz
Keyword(s):  
Cross Section ◽  
Geometrical Approach ◽  
Additivity Rule

Additivity rule for electron–molecule total cross section calculations at 50–5000 eV: a new geometrical approach

2008 ◽  
Vol 17 (6) ◽  
pp. 2103-2109 ◽  
Author(s):  
Shi De-Heng ◽  
Sun Jin-Feng ◽  
Zhu Zun-Lüe ◽  
Liu Yu-Fang
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Geometrical Approach ◽  
Additivity Rule

Additivity Rule for Electron–Molecule Total Cross Section Calculations at 50–5000 eV: A Geometrical Approach

2007 ◽  
Vol 24 (10) ◽  
pp. 2819-2822 ◽  
Author(s):  
Shi De-Heng ◽  
Sun Jin-Feng ◽  
Ma Heng ◽  
Zhu Zun-Lue ◽  
Yang Xiang-Dong
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Geometrical Approach ◽  
Additivity Rule

scholarly journals Estimation of Surface Area and Volume of a Nematode from Morphometric Data

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Simon Brown ◽  
Kevin C. Pedley ◽  
David C. Simcock
Keyword(s):  
Surface Area ◽  
Cross Section ◽  
Geometric Approach ◽  
Geometrical Approach ◽  
Morphometric Data ◽  
Better Than ◽  
Area And Volume

Nematode volume and surface area are usually based on the inappropriate assumption that the animal is cylindrical. While nematodes are approximately circular in cross section, the radius varies longitudinally. We use standard morphometric data to obtain improved estimates of volume and surface area based on (i) a geometrical approach and (ii) a Bézier representation of the nematode. These new estimators require only the morphometric data available from Cobb’s ratios, but if fewer coordinates are available the geometric approach reduces to the standard estimates. Consequently, these new estimators are better than the standard alternatives.

XUV Absorption Spectra of Carbon Ions

1988 ◽  
Vol 102 ◽  
pp. 71-73
Author(s):  
E. Jannitti ◽  
P. Nicolosi ◽  
G. Tondello
Keyword(s):  
Absorption Spectra ◽  
Cross Section ◽  
Theoretical Calculations ◽  
Photoionization Cross Section ◽  
Carbon Ions

AbstractThe photoabsorption spectra of the carbon ions have been obtained by using two laser-produced plasmas. The photoionization cross-section of the CV has been absolutely measured and the value at threshold, σ=(4.7±0.5) × 10−19cm2, as well as its behaviour at higher energies agrees quite well with the theoretical calculations.

Elastic Scattering in Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 252-253
Author(s):  
J. Langmore ◽  
M. Isaacson ◽  
J. Wall ◽  
A. V. Crewe
Keyword(s):  
Electron Microscopy ◽  
Elastic Scattering ◽  
Cross Section ◽  
Quantum Noise ◽  
Dark Field ◽  
Elastic Cross Section ◽  
Biological Molecules ◽  
Dark Field Microscopy ◽  
Field Systems ◽  
Effects Of Radiation

High resolution dark field microscopy is becoming an important tool for the investigation of unstained and specifically stained biological molecules. Of primary consideration to the microscopist is the interpretation of image Intensities and the effects of radiation damage to the specimen. Ignoring inelastic scattering, the image intensity is directly related to the collected elastic scattering cross section, σɳ, which is the product of the total elastic cross section, σ and the eficiency of the microscope system at imaging these electrons, η. The number of potentially bond damaging events resulting from the beam exposure required to reduce the effect of quantum noise in the image to a given level is proportional to 1/η. We wish to compare η in three dark field systems.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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