English
Serum, as an essential nutrient for cell growth, plays a crucial role in protecting cells during cultivation, and the quality of serum directly affects the growth status of cells. PETG media bottles are specialized containers used for storing serum, and they must meet certain necessary conditions to ensure the stability and safety of serum during storage.
Cold Resistance: Serum storage differs from ordinary items and typically requires preservation in environments ranging from -5°C to -20°C. If stored at 4°C, it's advisable not to exceed one month. This necessitates that PETG media bottles have excellent cold resistance to meet the low-temperature storage requirements of serum.
Transparency: The quality of serum can be preliminarily discerned by its appearance. Good serum should be clear and bright, with a tan or brownish-yellow color, minimal to no precipitates, and relatively viscous. If serum appears turbid, opaque, or contains many precipitates, it indicates serum contamination or protein denaturation. To promptly assess the condition of serum, PETG media bottles must have good transparency, facilitating observation by laboratory personnel.
Sealing: Good sealing of the container is a prerequisite for proper serum storage. Poor coordination between the lid and the bottle neck can lead to bacterial invasion from the outside, affecting the quality of the serum.
In summary, cold resistance, transparency, and sealing are the essential basic requirements for PETG media bottles. Additionally, for convenient observation of serum volume, the bottle body generally features molded graduations, and to facilitate handling, these containers often adopt a square-shaped design.
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.