Phenolic lignin subunits

– carbohydrate degradation 795

– chemistry 164

– chromophore formation 172

– structure 164

Phenolic phenylcoumaran structures 411

Phenolic phenylcoumarans, neutral sulfite

Pulping reactions 413

Phenolic pinoresinol structures 410

– neutral sulfite pulping reactions 414

Phenolic polymer, lignin 31

Phenolic structures, hydroperoxide

Formation 652

Phenols

– in condensation reactions 424–425

– ionization 703

Phenoxyl radical

– chlorine bleaching 746

– formation by oxygen or by hydroxyl radical

Phenylcoumaran structures, phenolic 411

Phenylpropane a-carbonyl-b-arylether

Structures, sulfonation 412

Phenylpropane building blocks, lignin 32

Phenylpropanols 858

Phenylpropanones 858

Phenylpropene unit 2, HOMO- and electron

Density distribution 633

PHK process 11, 345–365, 816

– development 7

– dissolving pulp 1024

– influence of process conditions 351–358

– influence of wood species 358–365

– lignin and xylan removal rate 348

– see also prehydrolysis

PHK pulp

– purification effidency 942

– selectivity 838

Index 1331

Phosphate ion, ozone decomposition,

Promotor 789

Photochemical oxidation, lignin models 655

Photodegradation, a-carbonyl groupcontaining

Lignin model compounds 655

Photometric methods, metal ions

Determination 1222

Photometry, operating principle 1221

Photosensitized degradation, loblolly pine

(Pinus taeda) 656

Physical properties, hydrogen peroxide

850–853