Based upon Coherent Förster Resonance Energy Transfer, we have successfully demonstrated the first colloid quantum dot laser with two different kinds of quantum dots (donorsacceptors) in the light emitting layer. The donors can resonantly transfer energy into the acceptors,they also act as scattering centers. Through multiple scattering, it can form a coherent closed loop. All the donors can coherentlyresonantly transfer energy into all the acceptorsthe laser action is achieved.

The present invention relates to a building natural energy conversion ventilation device, which has cleaning indoor and outdoor air, also has air-conditioning cooling heating supplies, which can make the intake air closer to the dew point temperature of the indoor side air after heat exchange, thereby reducing the heat load of the heat source unit, Enhance its operating efficiency, achieve energy saving avoid waste heat emission.

The water two-phase change is used for energy conversion,the average air flow rate of the invention can be completely isolated as long as 0.2 m/sec, which can save 6RT freezing capacity equivalent to 6KW energy consumption compared with the conventional smoke exhausting cabinet body, effectively interacting with the outside world. Space isolation to avoid leakage of high pollution toxic gases

The water resourcesenergy sales systemits pricingsales method are used to monitor the water resourcesenergy required by the user to use the equipment, which is convenient for users to purchaseinquire,can contact system administrators, construction manufacturersrelated operators to Realize instant delivery of informationprovide good salesrepair services.

We developedoptimized a FRET-based genetically-encoded biosensor Met-lead with high sensitivity 10nM (0.2μg/dL, 2ppb) to fit the related regulations: the safety value of blood lead level for children 3μg/dLWHO-permitted level for tap water 10ppb. We further built a portable smart-phone device to measure Pb on-site. The practical applications of portable Met-lead can fulfill the needs from blood/urine Pb detection to drinking water/environmental irrigation water Pb monitoring, it will also help to build up a warning system to prevent further contamination from heavy metal Pb.