Coefficient 144

Populus rubrum, kinetic parameters for xylan

Water prehydrolysis 333

Populus tremula

– chemical composition 451

– density and void volume 128

Populus tremuloides

– comparison of experimental data with

diffusion model 153–154

– hemicelluloses, nonglucosic units 29

– kinetic parameters for xylan water

Prehydrolysis 333

pores 1265–1267

– collapse 1054

– structure, cell wall 1052–1056

Porosity 1266

– as function of fiber concentration 514

Porous woods, vessels 53

Portal cranes, log handling 97

Positive sorting, recovered paper 1188

post-consumer recovered paper 1177–1180

Post-oxygen washing 731

Post-treatment with peracetic acid, effect on

Brightness 883

Pourbaix diagram, AQ redox equilibria 317

Power dissipation, as function of pulp

Consistency 615

pre-consumer recovered paper 1177–1180

Pre-heated air, kraft recovery boiler 985

Pre-steaming, kraft cooking pretreatment

Pre-thickening, kraft black liquors 975

Precipitation

– pulp resins 1031

– xylan 1050

Prehydrolysis

– general discussion 325–345

Index 1333

– intensity see P-factor

– kinetic weight-loss parameters 332

– kraft process see PHK process

– liquor-to-wood ratio 326

– P-factor concept 343–345

– prehydrolysis-kraft process 347–350

– wood yield temporal development for

Beechwood 331

Pressure

– acid sulfite cooking cycle 427

– calculated influence on impregnation in