English
Erlenmeyer shake flasks are an important cell culture consumable. They are divided into triangular erlenmeyer shake flasks and high-efficiency erlenmeyer shake flasks according to their capacity and shape. Their characteristics are as follows:
Triangular erlenmeyer shake flask: The capacity of this cell shake flask is generally small, ranging from 125ml-1000ml. It is also called a conical shake flask. It is made of polycarbonate (PC) or PETG. It has a unique triangular shape design. The pipette or cell scraper can reach the corner of the bottle more easily, making the cell culture operation more convenient. It is mainly used for the cultivation of insect cell lines with higher oxygen requirements. Compared with consumables such as cell factories and cell spinner flasks, the cell culture area is smaller, and it is an economical cell culture tool.
High-efficiency erlenmeyer shake flasks: This type of erlenmeyer shake flask has a large capacity and is suitable for high-density cell culture. The working volume can be filled to 60-80% of the total volume, and the cell yield of the same volume of shake flask is higher. The 5L erlenmeyer shake flask is equipped with an ergonomically designed handle to facilitate the taking of the shaker and the transfer of liquid. The arc design of the bottleneck is excessively natural, and the size of the bottleneck guarantees an effective gas exchange space and is also convenient for one-handed operation.
The above are the characteristics of the two different erlenmeyer shake flasks. The same is that the two shake flasks are marked with a scale on the bottle body to facilitate the observation of the capacity of the culture medium. In the selection of bottle caps, a 0.2μm sterile vent cap is generally equipped, and a liquid transfer cap can also be selected to facilitate the aseptic transfer of liquid.
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.