The time-resolved fluorescence intensity fluctuations from single, immobilized complexes of the main light-harvesting complex (LHCII) of plants were investigated in different pH environments close to room temperature and under different light conditions. The efficiency of light harvesting, which was represented by complexes typically residing for long periods in strongly fluorescing states, was...

Employing the utility of the native chemical ligation, site-specific attachment of an ultrastable perylene dye to a derivative of the major light-harvesting complex (LHCII) was demonstrated. Biochemical analysis of the conjugate indicated that the structure and function of LHCII remain largely unaffected by the N-terminal modification.

We present here the first room-temperature 2D electronic spectroscopy study of energy transfer in the plant light-harvesting complex II, LHCII. Two-dimensional electronic spectroscopy has been used to study energy transfer dynamics in LHCII trimers from the chlorophyll b Qy band to the chlorophyll a Qy band. Observing cross-peak regions corresponding to couplings between different excitonic sta...

The ability to dissipate large fractions of their absorbed light energy as heat is a vital photoprotective function of the peripheral light-harvesting pigment-protein complexes in photosystem II of plants. The major component of this process, known as qE, is characterised by the appearance of low-energy (red-shifted) absorption and fluorescence bands. Although the appearance of these red states...

One of the most important issues in area of health and hygiene is location-allocation of organ harvesting centers and transplant centers according to coordination between supply and demand. In this paper, a mathematical model is presented for location-allocation of organ harvesting centers and transplant centers. The proposed model does not only minimize the present value of the total system co...

                                                                 Background: The use of the traditional method for saphenous vein harvesting is associated with wound complications and not on-time patient mobilization. This has caused the improvement of minimally invasive vein harvesting techniques, together with general bridging. This study was designed to compare the therapeutic results of...

For indoor Wireless Sensor Networks (WSNs), as the conventional energy harvesting (e.g., solar) ceases to work in an indoor environment, the limited lifetime is still a threaten for practical deployment. We report in this demo a selfsustaining indoor sensing system. First of all, given the pervasive operation of heating, ventilation and air conditioning (HVAC) systems indoors, our system harves...

A novel device is described for efficiently harvesting bone marrow in bone marrow transplantation that uses a newly developed passive flexible drilling unit and suction mechanism. The device reduces the invasiveness of bone marrow harvesting by collecting stem cells from the iliac bone with minimal punctures and by reducing the operation time and the contamination by T cells. The device is inse...

This paper presents a DC-DC boost converter for energy harvesting. The time-domain maximum power point tracking (MPPT) technique implements to maximize the source's harvesting performance with no additional switch and time slot. Furthermore, it is implementing digital self-tracking zero current detectors (ST-ZCD) high efficiency. fabricates 180nm CMOS process. input voltage of ranges from 0.2 0...

This article presents a self-powered image sensor with novel pixel architecture energy harvesting capabilities. Pixels are autonomous entities that can harvest or sense illumination independently. have fully asynchronous operation and do not require to be scanned read out their output. The was manufactured in UMC 180-nm technology tested. Their specifications competitive against the art, offeri...