摘要:
Methods for controlling the level of dissolved carbon dioxide and limiting osmolality in a mammalian cell culture process to enhance cell growth, viability and density, and increase biologic product concentration and yield are provided. Such control of the level of dissolved carbon dioxide and pH as well as the resulting ability to limit osmolality in a mammalian cell culture process is achieved by adopting alternative pH control strategies and CO2 stripping techniques during a mammalian cell culture process. Such pH control techniques and carbon dioxide stripping occur with little or no damage to the mammalian cells.
摘要:
A vibration frequency adjusting system and method measures energy of a vibration generated by a vibrator of an electronic device, and converts the vibration energy to a level of electric charge. The system and method further compares the level of electric charge with preset electric charge thresholds, and adjusts the level of electric charge to a preset level of electric charge according to the comparison. Then, the system and method converts the adjusted preset level of electric charge to a voltage, and outputs the voltage to vibrator, so as to adjust the frequency of the vibration according to the voltage.
摘要:
The present disclosure provides a method for filtering an incoming call to a communication device. The communication device stores a default ring duration M and a default call frequency N. The communication device may calculate the ring duration of an incoming call, and further determines whether the ring duration reaches the default ring duration M. If the ring duration does not reach the default ring duration M, the communication device determines whether a call frequency of the incoming call reaches the default call frequency N. If the call frequency reaches the default call frequency N, the communication device blocks a phone number of the incoming call.