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The paper begins with the ontology construction requirements based on ontology reuse and transformation of existing resources,combines the current situations of study on technical progress and tools for ontology construction at home and abroad,and conducts code development of tools for ontology construction and function realization based on WebProtege class library.In the process of realization,pay attention to the interactive mode of combination of automatic tool processing and manual review,and collect specific sample data to verify the feasibility and usability of applying the developed tools for ontology construction.
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<p><b>OBJECTIVES</b>To investigate the effects of newborn bull serum(NBS), vitamin C and vitamin E on cryopreservation of mouse seminiferous epithelial cells.</p><p><b>METHODS</b>The seminiferous epithelial cells from 7-day-old mice were cryopreserved in different freezing solutions. The cell recoveries were examined by Trypan blue exclusive staining after thawing. The freezing solutions composed of DMEM, 10% dimethylsulphoxide(DMSO), and 0, 5%, 10%, or 20% NBS, respectively, or composed of DMEM, 10% DMSO, 10% NBS, and 150 micrograms/ml vitamin C or 50 micrograms/ml vitamin E, respectively.</p><p><b>RESULTS</b>The cell recoveries in freezing solution containing 0, 5%, 10%, or 20% NBS were 83.4%, 84.7%, 85.7% and 83.6%, respectively. There were no significant differences between them. The cell recoveries in freezing solution containing vitamin C or vitamin E were 88.0% and 82.9%, respectively. There was no significant differences compared with that in freezing solution containing 10% DMSO and 10% NBS.</p><p><b>CONCLUSIONS</b>NBS, vitamin C and vitamin E have no significant protecting effects on mouse seminiferous epithelial cells, and can not significantly improve the cell recoveries.</p>