Cell culture flasks play an important role in medium-scale cell and tissue culture in the laboratory. Common specifications include 25cm2, 75cm2, 175cm2, and 225cm2, which can meet the needs of cell culture of different scales. Different from ordinary plastic bottles, the innovations in the design of cell culture flasks are reflected in the following aspects:
1. Bottleneck: The bottleneck of the cell culture flask is designed with torticollis, and the bottom is in the shape of an arc, which is convenient for the export of the culture solution. The bottleneck is relatively wide and there is no dead corner, so that the pipette and the cell scraper can go deep into every corner of the bottle, and the operation is more convenient.
2. Bottle cap: This cell consumable is equipped with two different bottle caps, which are suitable for different culture environments. The sealing cap is in a completely sealed state, and there are no vents on the cap. It is mainly used under carbon dioxide-free conditions such as incubators and greenhouses. The upper side of the breathable cover is provided with breathable holes, these holes can let the carbon dioxide in the environment enter the inside of the bottle, and create suitable growth conditions for cell growth.
3. Frosted: The process of cell culture experiment is recorded. The torticollis of the bottle is sprayed with a frosted writing area, which is convenient for scientific researchers to mark information.
4. Stacking: At the bottom of the cell culture flask, there are ventilating spokes, which can maintain the temperature balance between the bottles while facilitating stacking.
The above are the functional innovations of cell culture flasks. These special designs are convenient for experimenters to operate and are also more conducive to the smooth progress of cell culture experiments.
The FAI climbed 5.9 percent year-on-year in the first 11 months of 2018, quickening from the 5.7-percent growth in Jan-Oct, the National Bureau of Statistics (NBS) said Friday in an online statement.
The key indicator of investment, dubbed a major growth driver, hit the bottom in August and has since started to rebound steadily.
In the face of emerging economic challenges home and abroad, China has stepped up efforts to stabilize investment, in particular rolling out measures to motivate private investors and channel funds into infrastructure.
Friday's data showed private investment, accounting for more than 60 percent of the total FAI, expanded by a brisk 8.7 percent.
NBS spokesperson Mao Shengyong said funds into weak economic links registered rapid increases as investment in environmental protection and agriculture jumped 42 percent and 12.5 percent respectively, much faster than the average.
In breakdown, investment in high-tech and equipment manufacturing remained vigorous with 16.1-percent and 11.6-percent increases respectively in the first 11 months. Infrastructure investment gained 3.7 percent, staying flat. Investment in property development rose 9.7 percent, also unchanged.