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described in this paper show that there is the photoconductive effect of
liquid, i.e. when light shines into a
sort of alkali, acid or salt solution, the conductivity of the solution will
increase. The mechanism of the effect is explained as follows. When hydrated
ions in the solution absorb photons with their high enough energies, they will
decompose to naked ions and water-molecules. The naked ions can reach an anode or a cathode more easily and
faster than the hydrated ions; It is possible that when a molecule in the solution
absorbs a photon with its high enough energy, it will decompose to negative and
positive ions. Based on the effect, a device producing hydrogen by the
solar-energy had been devised.
purchasing and reserving system is an innovation in urban land usage in china,
despite several financial problems with it. Land securitization is the best
choice for carrying out the urban land reserve system. In the framework of
urban land purchasing and reserving system, the urban land securitization was
divided into two subunits, land real assets securitization and land credit
assets securitization, according to whether the assets are entity or not.
According to the types of securities, the former includes land bonds,
investment funds and land trust plan three modes, while the latter includes
balance-in mode, balance-out mode, quasi-off-balance-sheet mode and off-shore
four modes. Discussion the aforementioned operation modes lead to suggestions
for improving urban land securitization.