Extraction of black liquor from brown stock may also be effected through screw presses of wash presses.

Methods: Hot-water extraction method was optimized by orthogonal designing and was used to extract crude polysaccharides from cuttlebone.

Through dipping in hot water and ethanol precipitation, a kind of proteinase A inhibitor can be selected from the powder of Ganoderma lucidum by submerged fermentation ;