has specified input has specified output achieves_planned_objective material processing cell cycle synchronization OBI PA cell cycle synchronization Bjoern Peters and Nicole Washington Elimination of serum from the culture medium for about 24 hours results in the accumulation of cells at G1 phase. This effect of nutritional deprivation can be restored by their addition by which time the cell synchrony occurs. a process with the objective to obtain a cell culture in which all cells are in the same stage of the cell cycle material transformation objective cultured cell population metadata complete