紫外发射增强的氧化锌薄膜的制备方法

该发明专利是一种紫外发射增强的氧化锌薄膜的制备方法。该专利采用的是磁控反应溅射法。其特征是：采用99．999％的金属锌作为阴极靶，在阴极靶材中掺入0．1wt％～5wt％的光谱纯的金属铁。

Screening and characterization of a high taxol producing fungus by protoplast mutagenesis

The preparation, regeneration and mutagenesis of the taxol-producing fungus UV40-19 protoplasts were discussed in the experiment. Totally 42 strains displayed hygromycin resistance. Six strains were found to be positive mutants when screened on plate containing 90μg/mL hygromycin. One hereditarily stable strain UN05-6 was obtained, which raised the taxol yield from （376.38 ± 8.41）μg/L to （493.12 ±11.36） μg/L. The optimal conditions for the preparation, regeneration and mutagenesis of the taxol producing fungus UV40-19 were as follows： 1 ）enzymolysis in a solution containing 3% lywallzyme, 4% snailase, 1% lysozyme and 3% cellulose at 30~C water bath, pH5.5 - 6.0 for 5h; 2） The prepared protoplasts were regenerated by using bilayer plate culturing method; 3）To mutagenize the fungus UV40-19, the protoplast suspension was treated with 0.8mg/mL NTG for 15min, followed by UV irradiation （30W, 30cm distance）for 40s under magnetic stirring. The purified products of the fungus UN05-6 fermented extracts have significant inhibitive effects on SMMC-7721 cell.

Novel Air Purification System for Installation in Air Handling Units： Development, Assembly and Experimental Analysis

Nowadays, people pass 90% of their time in closed spaces, therefore, an increasing care in the creation and upkeep of healthier environments as a personal and as professional level become a major issue. The present project has as goal the verification and optimization of the implicit need of an OCRAMclima~ AHU （air handling units） in IAQ （indoor air quality） and its effectiveness in treatment and/or air purification, having as basis the legal national and European requirements for IAQ. This work was based on the study of the state of the art of the techniques in air purification and in the evaluation of their performance, culminating in the production of the prototype OCRAMclima~ NPS （nano purifying system）. The purifying phenomena involved are UVGI （ultraviolet germicidal irradiation） and catalytic ionization of air. The performance test was accomplished in a closed loop circuit, which results, obtained by an independent IAQ analyst, were satisfactory, indicating the viability of application of this system to indoor air disinfection. The outcome revealed that the conjugating of both phenomena, the air sterilizing by UV and catalytic ionization, is efficient when used for air purification, mainly for volatile organic compounds and bioaerosols.

Enhanced ultraviolet emission of ZnO microrods array based on Au surface plasmon

In this work, the Au/ZnO hybrid microstructure was fabricated by assembling Au nanoparticles(NPs) onto the surface of ZnO microrods, and an obviously improved ultraviolet(UV) emission of ZnO is observed in the hybrid microstructure. About 27-fold enhancement ratio of the UV emission to the green band emission of ZnO is achieved. The underlying enhanced mechanism of the UV emission intensities can be ascribed to the charge transfer and the efficient coupling between ZnO excitons and Au surface plasmon(SP).

Ultraviolet-emitting ZnO thick layer grown by thermal oxidation with gallium

The ZnO layer with thickness of 1.6 jim in ZnO/ZnGa2O4 composite structure was grown by the thermal oxidation of ZnS sub- strate with gallium. The optical property of the ZnO thick layer was investigated by time-resolved photoluminescence. A single UV emission around 375 nm with short lifetime was observed at room temperature while the visible emission was absolutely quenched. The UV emission band was composed of the neutral donor bound exciton （D^0X） and donor-acceptor pair （DAP） emission peaks with large full-width at half-maximums （FWHMs） at 3.367 and 3.318 eV, respectively, at 10 K. However, the intensity of the D^0X emission was stronger than that of the DAP emission at measuring temperatures of 10-300 K.