PETG media bottles are mainly used for the storage of various serums, such as fetal bovine serum, calf serum, adult bovine serum, horse serum, chicken serum, etc. The packaging has a square design for easy grip, and the bottle is transparent for easy viewing. Another important feature of it is its low temperature resistance.
Serum refers to the light yellow transparent liquid separated from fibrin in plasma after blood coagulation or refers to plasma from which fibrin has been removed. Its main function is to provide basic nutrients, provide hormones and various growth factors, provide binding proteins, provide contact-promoting and growth factors to protect cells from mechanical damage, and play some protective effects on cells in culture. Serum that needs to be stored for a long time must be stored in a low temperature refrigerator of -20℃-70℃. If it is stored in a refrigerator at 4℃, the storage time should not exceed 1 month. Since the volume of the serum will increase by about 10% when it freezes, a certain volume of space must be reserved before the serum is frozen in a low temperature refrigerator.
In view of the strict requirements of serum on storage environment, PETG media bottles must have good low temperature resistance, so as to ensure the stability of serum during storage. PETG material has excellent chemical resistance and can withstand -70 ° C, which also makes it the best choice for serum bottle packaging materials.
From the perspective of serum storage requirements, low temperature resistance is the basic requirement for PETG media bottles, and it is also a necessary condition to ensure serum activity.
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.