Fluorescence of saturated hydrocarbons. III. Effect of molecular structure

1973 ◽  
Vol 58 (4) ◽  
pp. 1300-1317 ◽  
Author(s):  
William Rothman ◽  
Fumio Hirayama ◽  
Sanford Lipsky
Keyword(s):  
Molecular Structure ◽  
Saturated Hydrocarbons

scholarly journals The high-energy band in the photoelectron spectrum of alkanes and its dependence on molecular structure

1999 ◽  
Vol 64 (11) ◽  
pp. 673-680 ◽  
Author(s):  
Ivan Gutman ◽  
Viktorija Gineityte ◽  
Mirko Lepovic ◽  
Miroslav Petrovic
Keyword(s):  
Molecular Structure ◽  
Energy Band ◽  
Photoelectron Spectrum ◽  
Line Graph ◽  
Energy Levels ◽  
Molecular Graph ◽  
High Energy ◽  
Saturated Hydrocarbons ◽  
Ionization Energies ◽  
Laplacian Eigenvalues

In the model for the ionization energies of the C2s-electrons in saturated hydrocarbons, put forward by Heilbronner et al., the energy levels are calculated as eigenvalues of the line graph of the hydrogen-filled molecular graph. It is now shown that in the case of alkanes, these energy levels are related to the Laplacian eigenvalues of the molecular graph. A few rules are formulated, relating these ionization energies with molecular structure.

Towards the Positronium and Radiolytic Hydrogen Formation Mechanisms in Liquid Hydrocarbons

2012 ◽  
Vol 733 ◽  
pp. 19-23
Author(s):  
Vsevolod Byakov ◽  
Sergey V. Stepanov
Keyword(s):  
Molecular Structure ◽  
Radical Cations ◽  
Formation Mechanisms ◽  
Cyclic Form ◽  
Liquid Hydrocarbons ◽  
Hydrogen Formation ◽  
Saturated Hydrocarbons ◽  
Cyclic Hydrocarbons ◽  
Primary Radical ◽  
Structure Changes

Ps and radiolytic hydrogen yields anticorrelate in saturated hydrocarbons when molecular structure changes from a normal to a cyclic form. This fact is explained by much higher mobility of primary radical-cations in cyclic hydrocarbons than in normal ones.

scholarly journals The thermal conductivities of the saturated hydrocarbons in the gaseous state

1931 ◽  
Vol 134 (823) ◽  
pp. 77-96 ◽  
Keyword(s):  
Molecular Structure ◽  
Saturated Hydrocarbons ◽  
Gaseous State ◽  
Temperature Coefficients ◽  
Boiling Points ◽  
The Subject ◽  
Thermal Conductivities

The purpose of the present research has been to investigate the bearing of molecular structure on the thermal conductivities of the gaseous saturated hydrocarbons. The first four members of this family of hydrocarbons, namely, methane, ethane, propane and butane, having conveniently low boiling points, were chosen as the subject of the research. In view of the results obtained for these gases, further experiments were carried out, using n -pentane and n -hexane. The thermal conductivities of methane, ethane, n -pentane and n -hexane have been previously determined, and their values, together with the values obtained for the temperature coefficients and the names of the investigators, are shown below.

Molecular Structure of the Outermost Cell Wall Component of Spirillum Serpens

1977 ◽  
Vol 35 ◽  
pp. 342-343
Author(s):  
Wah Chiu ◽  
David Grano
Keyword(s):  
Molecular Structure ◽  
Cell Wall ◽  
Outer Membrane ◽  
Gel Electrophoresis ◽  
Electron Microscopic Examination ◽  
Electron Microscopic ◽  
Cell Wall Component ◽  
Protein Components ◽  
Exposure Technique ◽  
Structural Aspects

The periodic structure external to the outer membrane of Spirillum serpens VHA has been isolated by similar procedures to those used by Buckmire and Murray (1). From SDS gel electrophoresis, we have found that the isolated fragments contain several protein components, and that the crystalline structure is composed of a glycoprotein component with a molecular weight of ∽ 140,000 daltons (2). Under an electron microscopic examination, we have visualized the hexagonally-packed glycoprotein subunits, as well as the bilayer profile of the outer membrane. In this paper, we will discuss some structural aspects of the crystalline glycoproteins, based on computer-reconstructed images of the external cell wall fragments.The specimens were prepared for electron microscopy in two ways: negatively stained with 1% PTA, and maintained in a frozen-hydrated state (3). The micrographs were taken with a JEM-100B electron microscope with a field emission gun. The minimum exposure technique was essential for imaging the frozen- hydrated specimens.

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