The development of cell culture technology has been very mature so far. Cell growth needs to meet various requirements such as environment, temperature, osmotic pressure, pH value, etc. In addition to providing basic nutrients in various synthetic media, it is also necessary to adapt to different cells and different culture purposes. Add serum and other substances to promote cell growth. Therefore, media bottles have a wide range of applications in the field of cell culture.
Serum is a very complex mixture formed by removing fibrinogen from plasma, mainly including fetal bovine serum, calf serum, adult bovine serum, horse serum, goat serum, chicken serum, rabbit serum, etc., among which fetal bovine serum is used. is most commonly used. Serum provides important substances such as extracellular matrix, growth factors and transferrin. The proportion of serum added should be determined according to different cells and different research purposes. 10%~20% serum can maintain the rapid growth and proliferation rate of cells, which is called growth medium; in order to maintain slow growth or immortality of cells, 2%~5% serum can be added, which is called maintenance medium.
Due to the particularity of serum, its storage temperature should be -5°C to -20°C. Media bottles are generally made of transparent PET material by injection stretch blowing technology. This material has good heat aging resistance, embrittlement temperature of -70 °C, and still has certain toughness at -30 °C, which meets the storage needs of serum. . And the media bottle will be sterilized, no pyrogen, no endotoxin, no DNase, no RNase and other factors that affect cell growth.
Serum is an indispensable item for cell culture. With the continuous development of biological products, immunotherapy, scientific research institutes and other fields, the demand for serum will also increase, and the media bottle will also have a wider application in the field of cell culture.
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.