Geometric Constraints at the Surfactant Headgroup:  Effect on Lipase Activity in Cationic Reverse Micelles

Langmuir ◽  
2005 ◽  
Vol 21 (26) ◽  
pp. 12115-12123 ◽  
Author(s):  
Rajendra Narayan Mitra ◽  
Antara Dasgupta ◽  
Debapratim Das ◽  
Sangita Roy ◽  
Sisir Debnath ◽  
...  
Keyword(s):  
Lipase Activity ◽  
Reverse Micelles ◽  
Geometric Constraints

Influence of Gold Nanoparticles of Varying Size in Improving the Lipase Activity within Cationic Reverse Micelles

2010 ◽  
Vol 16 (6) ◽  
pp. 1941-1950 ◽  
Author(s):  
Subhabrata Maiti ◽  
Dibyendu Das ◽  
Anshupriya Shome ◽  
Prasanta Kumar Das
Keyword(s):  
Gold Nanoparticles ◽  
Lipase Activity ◽  
Reverse Micelles

Dependence of Lipase Activity on Water Content and Enzyme Concentration in Reverse Micelles

Biocatalysis ◽  
1990 ◽  
Vol 4 (2-3) ◽  
pp. 153-161 ◽  
Author(s):  
Daeseok Han ◽  
Peter Walde ◽  
Pier Luigi Luisi
Keyword(s):  
Water Content ◽  
Lipase Activity ◽  
Reverse Micelles ◽  
Enzyme Concentration

On the Origin of Unchanged Lipase Activity Profile in Cationic Reverse Micelles†

Langmuir ◽  
2000 ◽  
Vol 16 (1) ◽  
pp. 76-80 ◽  
Author(s):  
Prasanta Kumar Das ◽  
Arabinda Chaudhuri
Keyword(s):  
Lipase Activity ◽  
Reverse Micelles ◽  
Activity Profile

Gold nanorod in reverse micelles: a fitting fusion to catapult lipase activity

2011 ◽  
Vol 47 (35) ◽  
pp. 9864 ◽  
Author(s):  
Subhabrata Maiti ◽  
Moumita Ghosh ◽  
Prasanta Kumar Das
Keyword(s):  
Lipase Activity ◽  
Reverse Micelles ◽  
Gold Nanorod

A Spectrophotometric Lipase Activity Assay by Coupled Lipase-Lipoxygenase in Reverse Micelles

Biocatalysis ◽  
1990 ◽  
Vol 3 (4) ◽  
pp. 357-365 ◽  
Author(s):  
Alejandro Hochkoeppler ◽  
Sandro Palmieri
Keyword(s):  
Lipase Activity ◽  
Reverse Micelles ◽  
Activity Assay

GNP confinement at the interface of cationic reverse micelles: influence in improving the lipase activity

RSC Advances ◽  
2012 ◽  
Vol 2 (24) ◽  
pp. 9042 ◽  
Author(s):  
Moumita Ghosh ◽  
Subhabrata Maiti ◽  
Sayanti Brahmachari ◽  
Prasanta Kumar Das
Keyword(s):  
Lipase Activity ◽  
Reverse Micelles

Infrared investigation of water encapsulated in non ionic reverse micelles

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-215-Pr7-218 ◽  
Author(s):  
J.-B. Brubach ◽  
A. Mermet ◽  
A. Filabozzi ◽  
P. Colavita ◽  
A. Gerschel ◽  
...  
Keyword(s):  
Reverse Micelles

Parallel Glide: A Fundamentally Different Type of Dislocation Motion in Ultrathin Metal Films

2003 ◽  
Vol 779 ◽  
Author(s):  
T. John Balk ◽  
Gerhard Dehm ◽  
Eduard Arzt
Keyword(s):  
Thermal Cycling ◽  
Grain Boundaries ◽  
Film Surface ◽  
Metal Films ◽  
Geometric Constraints ◽  
Film Stress ◽  
Diffusional Creep ◽  
Creep Model ◽  
Substrate Interface ◽  
Film Substrate

AbstractWhen confronted by severe geometric constraints, dislocations may respond in unforeseen ways. One example of such unexpected behavior is parallel glide in unpassivated, ultrathin (200 nm and thinner) metal films. This involves the glide of dislocations parallel to and very near the film/substrate interface, following their emission from grain boundaries. In situ transmission electron microscopy reveals that this mechanism dominates the thermomechanical behavior of ultrathin, unpassivated copper films. However, according to Schmid's law, the biaxial film stress that evolves during thermal cycling does not generate a resolved shear stress parallel to the film/substrate interface and therefore should not drive such motion. Instead, it is proposed that the observed dislocations are generated as a result of atomic diffusion into the grain boundaries. This provides experimental support for the constrained diffusional creep model of Gao et al.[1], in which they described the diffusional exchange of atoms between the unpassivated film surface and grain boundaries at high temperatures, a process that can locally relax the film stress near those boundaries. In the grains where it is observed, parallel glide can account for the plastic strain generated within a film during thermal cycling. One feature of this mechanism at the nanoscale is that, as grain size decreases, eventually a single dislocation suffices to mediate plasticity in an entire grain during thermal cycling. Parallel glide is a new example of the interactions between dislocations and the surface/interface, which are likely to increase in importance during the persistent miniaturization of thin film geometries.

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