Strong nonmonotonous temperature dependence of exciton migration rate in J aggregates at temperatures from 5 to 300 K

Article Abstract:

The first measurement of the rate of excition-excition anihilation in J aggregates for which strong nonmonotonous temperature dependence is found is presented. The conclusion states that an excition hopping process occurs at low temperature, a coherent wave-packet-like excition transport occurs in the intermediate temperature region and a strong excition scattering occurs on optical phonons at high temperature.

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High-field EPR study of carotenoid and the angular orientation of chlorophyll in photosystem II

Article Abstract:

The carotenoid and chlorophyll cation radicals in hydroxylamine treated PSII membranes from spinach are studied by 285 GHz high-field EPR spectroscopy. By using the inherent high resolution of high-field EPR in combination with 1D-oriented samples and knowledge of the g-tensor orientation, it is possible to determine directly the orientation of a radical with respect to the axis of orientation.

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High-speed imaging of sustained metabolic target patterns in living neutrophils during adherence

Article Abstract:

A study is conducted to investigate the [propagation of circular NAD(P)H autofluorescence and proton waves in individual living human neutrophils using high-speed fluorescence microscopy. the results reveal that physical-chemical self-organization of metabolism is a fundamental aspect of cell function.

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