Molecular Structure in Soil Humic Substances:  The New View

2005 ◽  
Vol 39 (23) ◽  
pp. 9009-9015 ◽  
Author(s):  
Rebecca Sutton ◽  
Garrison Sposito
Keyword(s):  
Molecular Structure ◽  
Humic Substances ◽  
New View

Atrazine Interactions with Soil Humic Substances of Different Molecular Structure

1998 ◽  
Vol 27 (6) ◽  
pp. 1324-1333 ◽  
Author(s):  
Alessandro Piccolo ◽  
Pellegrino Conte ◽  
Irene Scheunert ◽  
Maurizio Paci
Keyword(s):  
Molecular Structure ◽  
Humic Substances

Self-assembly of alkoxysilanized humic substances into multidomain adlayers at the water–solid interface: linking surface morphology to the molecular structure of the adsorbate

Soft Matter ◽  
2012 ◽  
Vol 8 (8) ◽  
pp. 2452 ◽  
Author(s):  
Leonid A. Karpiouk ◽  
Sergey A. Ponomarenko ◽  
Ahmed Mourran ◽  
Dmitry Bochkariov ◽  
Aziz M. Muzafarov ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Surface Morphology ◽  
Humic Substances ◽  
Self Assembly ◽  
Solid Interface

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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