| http://www.w3.org/ns/prov#value | - When the potato tubers arrive in the laboratory from the field in the winter, pieces are removed from them with a cork borer, cut into slices and separated into ???physiological compartments??? in an elaborate series of steps; specific substances, such as enzymes, are studied both intercellularly, i.e. between the cells, in the cell walls and in the intercellular fluid, and in the cytoplasm, the c
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