Ad
related to: uses of mortar and pestle chemistry
Search results
Results from the WOW.Com Content Network
A mortar and pestle is a set of two simple tools used to prepare ingredients or substances by crushing and grinding them into a fine paste or powder in the kitchen, laboratory, and pharmacy. The mortar ( / ˈ m ɔːr t ər / ) is characteristically a bowl, typically made of hardwood, metal, ceramic , or hard stone such as granite .
Using a nonporous ceramic mortar and pestle, a small quantity of the solid sample is ground up until the sample is exceedingly fine and has a glassy appearance. A drop of the mulling agent is added to the ground solid in the mortar. The mixture is further ground up until a uniform paste with the consistency of toothpaste is acquired.
The mortar and pestle, already used for thousands of years, is a standard tool even in modern laboratories. More modern solutions are based on blender type instruments, bead mills , ultrasonic treatment (also sonication ), rotor-stator mechanical, high pressure, and many other physical forces.
The symbols most commonly associated with pharmacy are the mortar and pestle (North America) and the ℞ (medical prescription) character, which is often written as "Rx" in typed text; the green Greek cross in France, Argentina, the United Kingdom, Belgium, Ireland, Italy, Spain, and India; the Bowl of Hygieia (only) often used in the ...
Alternative condensation conditions have been developed, including the use of Lewis acid catalysts. Preparation of resorcin[4]arenes from resorcinol and an aldehyde. A green chemistry procedure uses solvent-free conditions: resorcinol, an aldehyde, and p-toluenesulfonic acid are ground together in a mortar and pestle at low temperature. [7]
Tools Rush In. Saving counter space and money and reducing clutter are more valuable than any of these supposedly must-have gadgets and products.
The technique can be done by using a mortar and pestle cooled to liquid nitrogen temperatures, but use of this classic apparatus is laborious and sample loss is often a concern. Specialised stainless steel pulverizers generically known as Tissue Pulverizers are also available for this purpose.
This pair of tools is called a mortar and pestle. The material would be placed into the mortar and the pestle would be moved and pressed into the mortar to grind the material into a fine powder. This process could be used for medicine and cooking. The mortar and pestle are still used today for many cooking recipes.
Ad
related to: uses of mortar and pestle chemistry