On the formal potential of the cerium(IV)–cerium(III) couple at –5 °C in 6.5 mol kg–1HClO4

Author(s):  
Roberto Zingales
Keyword(s):  
2011 ◽  
Vol 239-242 ◽  
pp. 2499-2502
Author(s):  
Nan Nan Wei ◽  
Jiang Yan Du

A new electrochemical biosensor based on the immobilization of horseradish peroxidase(HRP) on TiO2 nanoneedles modified electrodes has been fabricated. The direct electrochemical response of HRP immobilized on the modified electrode was dramatically enhanced. The immobilized HRP displayed a couple of stable and well-defined redox peaks with a formal potential of -0.379 V (vs. SCE). The HRP/TiO2 nanoneedles modified electrode exhibited a remarkable electrocatalytic activity toward the oxidation of H2O2. The amperometric response to H2O2 showed a linear range of 4–700μmol/L, with the calculated detection limit of 0.78 μmol/L at a signal-to-noise ratio of three. The modified electrode displayed an acceptable reproducibility and good stability. The new HRP/TiO2 nanoneedles matrix is expected to have wide applications for enzymes and proteins immobilization and direct electron transfer study and opened a way for low conductivity electrode biosensors.


2000 ◽  
Vol 16 (02) ◽  
pp. 111-115
Author(s):  
Zhu Yong-Chun ◽  
◽  
Cheng Guang-Jin ◽  
Dong Shao-Jun
Keyword(s):  

2020 ◽  
pp. 84-107
Author(s):  
Bruce Isaacs

The aesthetic of the fragment is examined in detailed analyses of the Hitchcockian frame. The frame is both the formal composition underpinning mise en scène and the opening into the infinite play of fragmented images within visual, aural, and narrative form. The frame is a site of formal “expressivity,” “abstraction,” “topographic representation,” and “schematization.” The fragmented frame is revealed in the modernist experimentation of form through color, line, and shape in North by Northwest, the topographic frame in The Birds, and the canting of the visual frame in Shadow of a Doubt. The chapter concludes that the representational image forming the diegesis is overwhelmed in Hitchcock’s experimental works by the formal potential of abstract shape and pattern.


Author(s):  
Colin Gunckel

This bibliography reflects the multifaceted relationship between Latina/os and various photographic traditions. As individuals and groups placed in front of the camera lens, Latino/as have often found themselves stigmatized, marginalized, or criminalized. Photographs taken by reformers, the police, and documentarians since the late 19th century, for instance, have often generated harmful or homogenizing visions of the US Latina/o population that frame them as racially different or otherwise problematic. Since the early decades of the 20th century, however, Latino/a photographers have produced bodies of work that challenge these limited visions to craft new images of identity, community, and history. Some of these individuals have harnessed the capacity of photography to fulfill an evidentiary or realist function as either social documentation, a political organizing tool, or a challenge to exclusionary mainstream media coverage. Others have explored the aesthetic and formal potential of photography by engaging in conceptual art practices, crafting speculative reimaginings of history, using it as an extension of performance, integrating it into other media, or mobilizing it as a complex mechanism of community- or self-representation. This bibliography covers the major works of scholarship that have attended to these key photographic tendencies and the places where they overlap, considering works that discuss Latina/os both in front of and behind the lens. Also included here are key exhibition catalogues and photographic essays that provide a representative sampling of visual tendencies or traditions mobilized by practicing Latina/o photographers, with particular attention to regional and ethnic diversity.


2019 ◽  
Vol 10 (12) ◽  
pp. 3623-3626 ◽  
Author(s):  
Brendon J. McNicholas ◽  
Robert H. Grubbs ◽  
Jay R. Winkler ◽  
Harry B. Gray ◽  
Emmanuelle Despagnet-Ayoub

Coordination of tris(pentafluorophenyl)borane to hexacyanoferrate shifts the formal potential by over 2.1 V while maintaining electrochemical reversibility.


1951 ◽  
Vol 23 (11) ◽  
pp. 1698-1698
Author(s):  
Frederick Duke ◽  
Robert Bremer

2008 ◽  
Vol 38 (2) ◽  
pp. 259-263
Author(s):  
Diana Amorello ◽  
Fabrizio Ledda ◽  
Vincenzo Romano ◽  
Roberto Zingales

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