must understand which method or combination of techniques will be most effective at producing the maximum yield. as our demand for minerals increases and our sources of primary ores are depleted, recycling and reclamation are becoming increasingly important. new developments allow resources to be extracted...
use the tanning material in the form of a liquor, i.e., an aqueous infusion of the plant material. modern tanneries use extracts that are concentrates of acqueous liquors.the latter usually being concentrated under reduced pressure to provide highly viscous or even solid products. other materials extracted...
by hand or with a spoon, or low speeds of a blender or electric mixer. boil cooking in liquid that is at boiling temperature. when a liquid is at a boil ( o f at sea level for water) bubbles will rise and continuously break the surface. braise browning meat or poultry in a small amount of liquid or fat...
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