Antimicrobial activity of the extract from Euphorbia hirta was investigated.The results show the extract could has obviously inhibit microbials.The antimicrobial minimum dosages(volume fraction) to different microbials were 0.078% for Bucillrs subtilus;0.156% for Escherichiu coli,Staphylococcus arueua,and Bacthuringiensis,0.625% for Rhizopus and Mucor,0.313% for Aspergillus;and 1.25% for Sacchharomyces cererisiae.The antimicrobial activity exhibited dosage-dependant character,and also increased with time.Thermal promotion effect was also found.

Sound environment,among several different kinds of ladders-or simple classroom,has been investigated and argued via grey correlative degree analysis.The point of view was presented,constructing harmonious sound field couldn't be despised in theater and the good quality of acouticst with sound absorption material.

The synthesis method of indium and indium oxide nanoparticles by means of decomposition of the organometallic precursor In(η5-C5H5) was represented.The microstructure of indium and indium oxide nanoparticles was characterized by transmission electron microscopies(TEM).