Inverted xerographic depletion discharge mechanism for the dark decay of electrostatic surface potential on amorphous semiconductors

1988 ◽  
Vol 64 (1) ◽  
pp. 450-452 ◽  
Author(s):  
S. O. Kasap
Keyword(s):  
Surface Potential ◽  
Amorphous Semiconductors ◽  
Discharge Mechanism ◽  
Electrostatic Surface Potential ◽  
Dark Decay

scholarly journals Crystal structure of chloroplastic thioredoxin z defines a novel type-specific target recognition

2020 ◽  
Author(s):  
Théo Le Moigne ◽  
Libero Gurrieri ◽  
Pierre Crozet ◽  
Christophe H. Marchand ◽  
Mirko Zaffagnini ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Subcellular Localization ◽  
Surface Potential ◽  
Target Recognition ◽  
Chemical Mechanism ◽  
Protein Targets ◽  
Cycle Enzyme ◽  
Electrostatic Surface Potential ◽  
Trx Fold ◽  
Plant Sources

AbstractThioredoxins (TRXs) are ubiquitous disulfide oxidoreductases structured according to a highly conserved fold. TRXs are involved in a myriad of different processes through a common chemical mechanism. Plant thioredoxins evolved into seven types with diverse subcellular localization and distinct protein targets selectivity. Five TRX types coexist in the chloroplast, with yet scarcely described specificities. We solved the first crystal structure of a chloroplastic z-type TRX, revealing a conserved TRX fold with an original electrostatic surface potential surrounding the redox site. This recognition surface is distinct from all other known TRX types from plant and non-plant sources and is exclusively conserved in plant z-type TRXs. We show that this electronegative surface endows TRXz with a capacity to activate the photosynthetic Calvin-Benson cycle enzyme phosphoribulokinase. TRXz distinct electronegative surface thereby extends the repertoire of TRX-target recognitions.

scholarly journals Impact of Ciprofloxacin and Chloramphenicol on the Lipid Bilayer ofStaphylococcus aureus: Changes in Membrane Potential

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Paulina L. Páez ◽  
María C. Becerra ◽  
Inés Albesa
Keyword(s):  
Staphylococcus Aureus ◽  
Membrane Potential ◽  
Cell Membrane ◽  
Surface Potential ◽  
Binding Sites ◽  
Ofstaphylococcus Aureus ◽  
Bacterial Membranes ◽  
Electrostatic Surface Potential ◽  
Number Of Binding Sites ◽  
Resistant Strains

The present study was undertaken to explore the interaction of ciprofloxacin and chloramphenicol with bacterial membranes in a sensitive and in a resistant strains ofStaphylococcus aureusby using 1-anilino-8-naphthalene sulfonate (ANS). The binding of this probe to the cell membrane depends on the surface potential, which modulates the binding constant to the membrane. We observed that these antibiotics interacted with the bilayer, thus affecting the electrostatic surface potential. Alterations caused by antibiotics on the surface of the bacteria were accompanied by a reduction in the number of binding sites and an increase in the ANS dissociation constant in the sensitive strain, whereas in the ciprofloxacin-resistant strain no significant changes were detected. The changes seen in the electrostatic surface potential generated in the membrane ofS. aureusby the antibiotics provide new aspects concerning their action on the bacterial cell.

STABILITY OF ADSORBED HYDROGEN ON Si(100) UNDER CHANGES OF THE SURFACE POTENTIAL

1996 ◽  
Vol 03 (02) ◽  
pp. 1227-1233 ◽  
Author(s):  
P. KRATZER ◽  
B. HAMMER ◽  
F. GREY ◽  
J. K. NØRSKOV
Keyword(s):  
Charge Transfer ◽  
Simple Model ◽  
Ab Initio Calculations ◽  
Surface Potential ◽  
Space Charge Region ◽  
Adsorbed Hydrogen ◽  
Clean Surface ◽  
Important Ingredient ◽  
Electrostatic Surface Potential ◽  
Chemisorption Energy

We study the effect of an electrostatic surface potential on the chemisorption energy of H 2 on a Si (100)2×1 surface on the basis of a set of ab initio calculations. We find a sizeable destabilization of the adsorbate, because the clean surface gains in stability compared to the H-terminated surface due to charge transfer between dangling bonds and the space charge region below the surface. We rationalize our results in terms of a simple model and discuss the possibility that potential-induced destabilization is an important ingredient in understanding STM-induced nanolithography.

Electrostatic surface potential and critical micelle concentration relationship for ionic micelles

Langmuir ◽  
1990 ◽  
Vol 6 (2) ◽  
pp. 506-508 ◽  
Author(s):  
Thomas W. Healy ◽  
Calum J. Drummond ◽  
Franz Grieser ◽  
Brent S. Murray
Keyword(s):  
Critical Micelle Concentration ◽  
Surface Potential ◽  
Electrostatic Surface Potential ◽  
Ionic Micelles

Dark Decay of Surface Potential in Vitreous As2S3

1982 ◽  
Vol 74 (1) ◽  
pp. K79-K82 ◽  
Author(s):  
A. M. Andriesh ◽  
A. I. Buzdugan ◽  
L. I. Zelenina ◽  
S. D. Shutov
Keyword(s):  
Surface Potential ◽  
Dark Decay
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