Relationship in soda-AQ cook 321

Quercus robur

– average cell dimensions 52

– extractives 35

– obligate heartwood formation 57

Quercus rubra, kinetic parameters for xylan

Water prehydrolysis 333

Quinoid structures

– elimination by alkaline hydrogen peroxide

– lignin 857

– residual lignin 174

Quinone-methide

– addition of hydrogen sulfide 167

– formation 166

– LUMO-distribution 166

– reduction 170

Quinone-methide intermediate

– chlorine bleaching 747

– lignin 856

r

R-values see alkali resistances

R10 see alkali resistances

R18

– lignin content 1230

– see also alkali resistances

R2 process, chlorine dioxide generation 742

Radial concentration profile

– Kazi and Chornet diffusion model of

Impregnation 153

– numerical solution of diffusion equation

162–163

Radial diffusion coefficient

– as function of NaOH concentration 145

– Poplar 144

Radial impregnation, NaOH concentration

Profile 155

Radiation degradation, molecular weight

Reduction 1059

Radical formation 792, 829

Radical part, ozone reactions 791

Radical reactions 792

Radical-scavenging

– methanol 821

– organic solvents 822

Radical-type chain reactions 789

Radical yield 812

Radiclone AM, Noss 606

Radiscreen, Noss 603–604

Raditrim, Noss 604

Index 1337

raised roll thickness screen 91–92

Raman spectroscopy 117, 178

Raoult’s law 970

Rapid displacement heating see RDH

Rare sugar, yield as function of H-factor 438

Rattan, cell types 50