Category: Uncategorized

Posted on

Lavpris smartphone EEG headset med 3D visualisering

DARQ GPT ser stort potentiale i at anvende denne billigt udstyr til arbejde med børn i at forbedre deres conitive evner. På billedet, en brugerdefineret størrelse cap med elektroder og to af EEG data smartphone visualation apps [Stopczynski et al 2014]
DARQ GPT ser stort potentiale i at anvende denne billigt udstyr til arbejde med børn i at forbedre deres conitive evner. På billedet, en
brugerdefineret størrelse cap med elektroder og to af EEG data smartphone visualation apps [Stopczynski et al 2014]

DARQ GPT forestiller sig, at den nuværende æra af smartphones og mobile beregninger giver flere og flere muligheder for at bruge avancerede værktøjer og udstyr i daglige liv applikationer. På sådanne værktøjer er blevet udviklet i Danmarks Tekniske Universitet[1]. En EEG-enhed, der oversætter elektromagnetisk aktivitet af hjernen til digitale data og fodrer det til en smartphone eller tablet hvor det kan være gemt og visualiseret. En af apps producerer 3D visualisering af hjerneaktivitet ved hjælp af LORETA kilde lokalisering.

[1] Stopczynski A, Stahlhut Christensen, Petersen MK, Larsen JE, Jensen CF, Ivanova MG, Andersen TS, Hansen LK. Smartphones som lommeformat labs: visioner for mobile brain imaging og neurofeedback. International Journal of Psykofysiologi 2014; 91:54-66.

Posted on

Graphene based enzymatic bioelectrodes and biofuel cells

ga
Methods used for electron transfer in the enzymatic biofuel cells

Abstract
The excellent electrical conductivity and ease of functionalization make graphene a promising material for use in enzymatic bioelectrodes and biofuel cells. Enzyme based biofuel cells have attracted substantial interest due to their potential to harvest energy from organic materials. This review provides an overview of the functional properties and applications of graphene in the construction of biofuel cells as alternative power sources. The review covers the current state-of-the-art research in graphene based nanomaterials (physicochemical properties and surface functionalities), the role of these parameters in enhancing electron transfer, the stability and activity of immobilized enzymes, and how enhanced power density can be achieved. Specific examples of enzyme immobilization methods, enzyme loading, stability and function on graphene, functionalized graphene and graphene based nanocomposite materials are discussed along with their advantages and limitations. Finally, a critical evaluation of the performance of graphene based enzymatic biofuel cells, the current status, challenges and future research needs are provided.

Source >> Nanoscale Journal, issue 16, 2015