Oxygenation and mixing of liquid cultures further depend on rotation of the liquid "in-phase", meaning the synchronous movement of the liquid with the shaker table. Under certain conditions the shaking process leads to a breakdown of liquid motion – called "out-of-phase phenomenon". This phenomenon has been intensively characterized for shake flask bioreactors. Out-of-phase conditions are associated with a strong decrease in mixing performance, oxygen transfer, and power input. Main factor for out-of-phase operation is the viscosity of the culture medium, but also the vessel diameter, low filling levels and/or a high number of baffles. [11] [12] [13] Legal restriction [ edit ] They may be graded, and spots of ground glass or enamel are frequently used for labelling purposes. Colour - available in a choice of clear or amber, the most popular of these is clear, although amber colour is ideal for light sensitive substances. Sentek has been specialising in the field of scientific equipment since 1991. Our range of sensors and temperature probes now represent essential equipment for all types of chemical testing applications involving conical flasks. Though our products are essentially scientific in nature, they are commonly used in a variety of everyday processes, from food to education.

The Erlenmeyer filter flask has the added benefit of preventing overturning. In contrast to measuring cylinders and even breakers, its wide base prevents spillage. In contrast to its wide base, the flask’s tiny mouth reduces its centre of gravity.https://www.glasscolabs.com/product-category/laboratory-glassware/laboratory-glasswares-flasks/conical-flask/

Remember, sharing your thoughts not only helps you gain a deeper understanding but also contributes to the Like beakers, Erlenmeyer flasks are not normally suitable for accurate volumetric measurements. Their stamped volumes are approximate within about 5% accuracy. [8] In biology [ edit ] Microcystis floating colonies in an Erlenmeyer flask.The conical flask may be used to measure the volume of liquids, however its measurements are not exact. Volumetric flasks are used to prepare standard solutions. They are supplied with precise, one-mark graduations and a stopper, and are designated as Class A or Class B depending on their accuracy. Standard measuring flasks are also offered for less critical measurements This standard was published in 2015 and supersedes the 2004 version. International standards are reviewed every five years, with this standard reviewed and confirmed in 2020.