Methanotrophic physiology is strongly affected by the amount of bioavailable copper, which regulates the enzymes used by methanotrophs to oxidize methane. Methanobactin is a small peptide secreted by methanotrophic bacteria that binds copper outside of the bacterial cell. In this study, gold nanoparticles were firstly synthesized with citrate acid, followed by addition of methanobactin. Then as CuSO4was continuously added to the solution, we found a red shift in the Uv-vis absorption spectra. Meanwhile, for the mixture of methanobactin, 1,4-resorcinol and chlorauric acid, we also found an absorption at 540nm after 1h in dark. We presume that methanobactin has the bioactivity of protecting gold nanoparticles as well as delivering electron for the catalytic synthesis of gold nanoparticles. These molecules then go on to form gold nanoparticles. Gold nanoparticles can be seen with the naked eye, as they turn a gold solution from yellow/gold to a deep cranberry/red. The nanoparticles also display a characteristic absorbance of approximately 540 nm on absorption spectra.

Research for algorithm of non-preemptive scheduling on multiprocessor is of great theoretical significance and practical significance. Based on non-preemptive scheduling, the performance of the algorithm is analyzed and investigated on two different objective functions about the turnaround time of the system and the low-cost problem with a limitation of time. Finally, the relevant conclusion is obtained which is the basis of the further research. It gives a guarantee to the algorithm performance which is designed for the practical application.

Producing in the multiprogramming systems of the demanding paging style ,thrashing is an extreme status coming from doing page replacement. Based on some research results, the cause of thrashing is discussed with describing the feature of it. A policy of "preventing first" is presented to hold on to refrain from the thrashing ,which sets forth the concrete method of preventing and ending the thrashing. Some relating conclusions are also fit for page replacements of the computer designing in other fields.