Results 191 to 200 of about 58,001 (244)

Boron‐Doped Nano‐Crystalline Coated Carbon Fibers for Phasic Dopamine Sensing

Advanced Healthcare Materials, EarlyView.
This uniform coating presents a mix of graphitic and diamond‐like carbon to create a mechanically and electrically robust alternative for the electrochemical detection of dopamine. The electrodes in this work possess the equivalent sensitivity to the state‐of‐the‐art FSCV dopamine detecting electrodes, whilst demonstrating an ability to withstand ...
Simon J. Higham, Juan M. Rojas Cabrera, Youngjong Kwak, Lydia Hong, Andre Chambers, Athavan Nadarajah, Sorel E. De Leon, Young Jun Jung, Negin Jalilinejad, Charles Blaha, Dong Pyo Jang, Yoonbae Oh, Kendall Lee, Alastair Stacey, Shaun L. Cloherty, Michael R. Ibbotson, David J. Garrett, Steven Prawer, Hojin Shin, Wei Tong   +19 more
wiley   +1 more source

Nanobiosensor Based on Catalytic Palladium Nanoclusters and Oxidases for Bianalyte Electrochemical Determination: Glucose and Ethanol in Sweat

Advanced Healthcare Materials, EarlyView.
A nanobiosensor for fast and simultaneous determination of sweat glucose and ethanol is presented. Deposited oxidase enzymes consume oxygen in the presence of the substrates, and co‐deposited palladium nanoclusters catalyze the electrochemical oxygen reduction, basis of the detection.
Alejandro Rodríguez‐Penedo, Estefanía Costa‐Rama, Beatriz Fernández, M. Teresa Fernández‐Abedul   +3 more
wiley   +1 more source

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Light Harvesting in a Fluctuating Antenna

Journal of the American Chemical Society, 2014
One of the major players in oxygenic photosynthesis, photosystem II (PSII), exhibits complex multiexponential fluorescence decay kinetics that for decades has been ascribed to reversible charge separation taking place in the reaction center (RC). However, in this description the protein dynamics is not taken into consideration.
Chmeliov, J., Trinkunas, G., van Amerongen, H., Valkunas, L.   +3 more
openaire   +2 more sources

Competition of Phytoplankton under Fluctuating Light

The American Naturalist, 2001
Light is an essential resource for phytoplankton and fluctuates on a wide range of timescales. To understand how light fluctuations affect phytoplankton community structure and diversity, we have studied a set of simple models using a combination of analytical and numerical techniques.
E, Litchman, C A, Klausmeier
openaire   +2 more sources

Photosynthesis in Fluctuating Light

Ecology, 1969
Experiments were conducted to test the assumption, always made in models of the productivities of higher plant communities, that photosynthetic rates measured in steady light can be used to predict the rates in fluctuating light. The photosynthetic rates of whole cucumber plants (Cucumis sativus) were measured in light which alternated between high and
K. J. McCree, R. S. Loomis
openaire   +1 more source

Dynamics of photosynthesis in fluctuating light

Current Opinion in Plant Biology, 2006
Our understanding of the molecular mechanisms of plant photosynthesis is expanding from insights into static fluxes in constant irradiance to an understanding of complex dynamic patterns in fluctuating light. Knowledge about regulatory interactions, information about relevant biological features that emerge in fluctuating light, and the new standards ...
Uwe, Rascher, Ladislav, Nedbal
openaire   +2 more sources

Universal Conductance Fluctuations of Light

Physical Review Letters, 1998
We observed that laser light, multiply scattered through small samples of optically dense colloidal suspensions, builds up anomalous long range correlations in the transmission speckle pattern. The dynamic autocorrelation function of angular integrated light intensity has two contributions, ${C}_{2}(t)$ and ${C}_{3}(t)$, which decay on very different ...
Frank Scheffold, Georg Maret
openaire   +1 more source

Light Fluctuations and Photosynthesis

Annals of Botany, 1974
The effects of fluctuating light on photosynthesis are examined. A simple model of leaf photosynthesis is used so that the analysis can be presented in explicit terms, the time-dependent problem is solved, and the response of photosynthesis to step changes in light-flux density is calculated.
openaire   +1 more source

Insect vision: Contrast perception under fluctuating light

Current Biology, 2023
Natural light levels vary tremendously, both over the day and from minute to minute, creating a formidable challenge for animals that rely on vision to survive. New work in fruit flies demonstrates the neural mechanisms that produce luminance-invariant perceptions of visual contrast.
openaire   +2 more sources

Particulate concentration measured from scattered light fluctuations

Optics Letters, 2000
Scintillation of scattered radiation caused by particulate matter is studied. By use of stochastic theory, expressions for mathematical expectation, variance, and scintillation index are derived. A method of measuring particulate-mass concentration with the scintillation index is proposed. The major advantage of this method is its insensitivity to lens
A, Chen, J, Hao, Z, Zhou, K, He
openaire   +2 more sources