English
In cell culture work within biological laboratories, Erlenmeyer shake flasks demonstrate multiple advantages due to their unique design and excellent performance, making them indispensable tools for researchers.
The first major advantage lies in the material. Made from medical-grade polycarbonate (PC), these flasks offer outstanding transparency for real-time observation of cell growth. This material not only provides strong impact resistance and withstands repeated high-temperature sterilization but also exhibits extremely low protein adsorption, ensuring stable medium composition. Compared to ordinary glass, PC Erlenmeyer shake flasks are 40% lighter, significantly reducing operator fatigue.
The second advantage is the structural design. The classic 55-degree conical flask body with a rounded bottom delivers three functional improvements: smoother pipetting, easier cell scraping, and a 30% reduction in medium residue. The ergonomically designed neck enhances one-handed operation stability by 50%, making it particularly suitable for prolonged continuous work.
The third advantage is the venting system. The caps equipped with 0.2μm PTFE hydrophobic vent membranes provide "intelligent breathing" functionality, effectively blocking microbial contamination while maintaining sufficient gas exchange. Experiments show this design keeps pH fluctuations within ±0.1, significantly outperforming standard sealed caps.
The fourth advantage is the comprehensive size range. Available from 50mL to 5L with uniform design standards, these flasks ensure experimental consistency. The 125mL and 250mL sizes are ideal for process development, while 1L and 5L sizes facilitate pilot-scale expansion. All sizes feature clear graduation marks with ≤±1% error.
The fifth advantage is cost-effectiveness. Compared to similar culture vessels, Erlenmeyer shake flasks offer 3-5 times longer service life and reduce per-cycle costs by 40%. The individually packaged design maintains sterility while preventing cross-contamination, improving experimental repeatability by 25%.
These five core advantages make Erlenmeyer shake flasks essential laboratory equipment, providing reliable support for both basic cell culture and complex process development. With advancements in materials science, next-generation Erlenmeyer shake flasks are evolving toward smarter and more environmentally friendly solutions, continuing to contribute to life science research.
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.