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Forever amber a story of the secondary wood components

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Summary

From prehistoric periods, mankind used tree exudates and extractives of various woods and barks and these were at times of major commercial importance. Only amber, tannins, oleoresins and rubber continue to be significant. The study of exudates and extractives has provided a major part of the foundations of organic chemistry and aspects of plant biochemistry such as biosynthesis and chemotaxonomy. The polyphenols in the Eucalyptus genus and those formed in different tissues of the tree stem illustrate the alternative pathways existing in the cells and the complexity of biosynthesis. Basic studies have provided understanding of means of alleviating numerous problems encountered in the industrial use of wood. Attension is drawn to the continuum of development and the contribution of many disciplines. Future studies will be mainly concerned with the control of the formation of secondary components in plantation species, the improvement of quality standards of products and the collection of basic data relevant to biotechnology and other fields. Developments will be dependant on the support of those who are not professional workers in the field.

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References

  • Allen, L. H. 1975: Pitch in wood pulps. Pulp Paper Can. 76: T139-T146

    Google Scholar 

  • Allen, L. H. 1980: Mechanisms and control of pitch deposition in newsprint mills. Tappi 63(2): 81–87

    Google Scholar 

  • Anonymous 1957: International Association of Wood Anatomists. Tropical Woods 107: 1–36; Multilingual glossary of terms used in woody anatomy. Public. IAWA 1964

  • Anonymous 1976: Brazil — a geography. London, Brazilian Embassy, 59 pp.

  • Baklien, A. 1960: The effects of extractives on black liquor from eucalypt pulping. Appita 14: 5–17

    Google Scholar 

  • Banks, J. C. G.; Hillis, W. E. 1969: Characterization of populations of Eucalyptus camaldulensis by chemical features. Aust. J. Bot. 17: 133–146

    Google Scholar 

  • Barton, G. M.; Gardner, J. A. F. 1963: Colour precursors in Douglas-fir. Forest Prod. J. 13: 216–220

    Google Scholar 

  • Bate-Smith, E. C. 1963: Usefulness of chemistry in plant taxonomy as illustrated by the flavonoid constituents. In: Swain, T. (Ed.): Chemical Plant Taxonomy. London, New York: Academic Press. pp. 127–139; and many other publications

    Google Scholar 

  • Bauer, L.; Birch, A. J.; Hillis, W. E. 1954: Some synthetic leucoanthocyanidins. Chem. Ind. (London): 433–434

  • Billek, G.; Ziegler, W. 1962: The biosynthesis of plant stilbenes. Part III. Monats. Chem. 93: 1430–1440

    Google Scholar 

  • Birch, A. J.; Donovan, F. W. 1953: Studies in relation to biosynthesis Part 1. Aust. J. Chem. 6: 360–368

    Google Scholar 

  • Burkill, I. H. 1935: A dictionary of the economic products of the Malay peninsula. Published by the Crown Agents for the Colonies, London, Vol. 2, 2402 pp.

  • Cohen, W. E. 1962: The influence of resins on paper manufacture. In: Hillis, W. E. (Ed.): Wood Extractives. New York, London: Academic Press. pp. 421–450

    Google Scholar 

  • Coppen, J. J. W.; Greenhalgh, P.; Smith, A. E. 1984: Gum naval stores: an industrial profile of turpentine and resin production from pine rosin. Rept Tropical Development and Research Institute G187: 40 pp.

  • Dadswell, H. E.; Hillis, W. E. 1962: Wood. In: Hillis, W. E. (Ed.): Wood extractives. New York, London: Academic Press. pp. 3–55

    Google Scholar 

  • Dalton, L. K. 1950: Tannin-formaldehyde resins as adhesives for wood. Aust. J. Appl. Sci. 1: 54–70

    Google Scholar 

  • Dalton, L. K. 1953: Tannin-formaldehyde resins as adhesives for wood. Aust. J. Appl. Sci. 4: 136–145

    Google Scholar 

  • De Silva, D. 1977: Utilization of wood with particular reference to the marine environment. Ph.D. Thesis Australian National University, Canberra, pp. 270

  • De Silva, D.; Hillis, W. E. 1980: The contribution of silica to the resistance of wood to marine borers. Holzforschung 34: 95–97; unpublished results

    Google Scholar 

  • Drewes, S. E.; Roux D. G. 1964: Condensed tannins, Part 20. Biochem. J. 92: 559–564

    Google Scholar 

  • Drewes, S. E.; Roux, D. G. 1966: Sterochemistry and biogenesis of mopanols and peltogynols and associated flavanoids from Colophospermum mopane. J. Chem. Soc. (C): 1644–1653

  • Erdtman, H. 1939: Phenolic constitutents of the pine heartwood and their retarding action upon the normal digestion of pine heartwood. Justus Liebigs Ann. Chem., 539: 116–127; and 1940: Contribution to the chemistry of sulfite digesting XXXVI. Svensk Papperstidn. 43: 255–263

    Google Scholar 

  • Erdtman, H. 1963: Some aspects of chemotaxonomy. In: Swain, T. (Ed.): Chemical plant taxonomy. London: Academic Press. pp. 89–125

    Google Scholar 

  • Esser, M. H. 1976: Editor, Proc. Lightwood Research Coordinating Council, Florida USA pp. 154; 1977 pp. 193; 1978 pp. 210; 1979 pp. 150

  • Fluckiger, F. A. 1894: Australische manna. Archiv. der Pharmazie, 232: 311–314

    Google Scholar 

  • Frachebound, M.; Rowe, J. W.; Scott, R. W.; Fanega, S. M.; Buhl, A. J.; Toda, J. K. 1968: New sesquiterpenes from yellow wood of slippery elm. Forest Prod. J. 18: 37–42

    Google Scholar 

  • Fukazawa, K.; Yamamoto, J.; Ishida, S. 1980: The season of heartwood formation in the genus Pinus. In: Mitteilungen der Bundesforschungsanstalt für Forst-u. Holzwirtschaft. Hamburg-Reinbek: 69–77

  • Gardner, J. A. F.; Hillis, W. E. 1962: The influence of extractives on the pulping of wood. In: Hillis W. E. (Ed.): Wood extractives. New York, London: Academic Press. pp. 367–403

    Google Scholar 

  • Gorham, J. 1980: The stilbenoids. In: Progress in phytochemistry, 6: 203–252

  • Hasegawa, M. 1958: Flavonoids contained in Prunus woods. J. Japan Forestry Soc. 40: 111–121

    Google Scholar 

  • Haslam, E. 1977: Symmetry and promiscuity in procyanidin biochemistry. Phytochemistry 16: 1625–1640

    Google Scholar 

  • Haslam, E. 1982a: Proanthocyanidins. In: Harborne, J. B., Mabry, T. J. (Eds.): The flavonoids, advances in research. London: Chapman and Hall. pp. 417–448

    Google Scholar 

  • Haslam, E. 1982b: The metabolism of gallic acid and hexahydroxydiphenic acid in higher plants. Progress Chem. Org. Nat. Prod. 41: 1–46

    Google Scholar 

  • Hathway, D. E. 1962: The use of hydroxystilbene compounds as taxonomic traces in the genus Eucalyptus. Biochem. J. 83: 80–84

    Google Scholar 

  • Hatt, H. H.; Hillis, W. E. 1947: The manna of Myoporum platycarpum R. Br as a possible commerical source of mannitol. J. Council Sci. Ind. Res. (Aust), 20(2): 207–224

    Google Scholar 

  • Hausen, B. M. 1981: Woods injurious to human health. Berlin, New York: de Gruyter. 190 pp.

    Google Scholar 

  • Hedley, Barry T. 1963: The future of natural resins. J. Oil Colour Chemists Assoc., 19(189): 75–95

    Google Scholar 

  • Hemingway, R. W.; Foo, L. Y. 1983: Condensed tannins: quinone methide intermediates in procyanidin synthesis. J. Chem. Soc., Chem. Commun.: 1035–1036

  • Herrick, F. W.; Hergert, H. L. 1977: Utilisation of chemicals from wood. In: Loewus, F. A.; Runeckles, V. C. (Eds.): Recent advances in phytochemistry. New York: Plenum. 11: 443–515

    Google Scholar 

  • Higgins, H. G.; Phillips, F. H.; Logan, A. F.; Balodis, V. 1973: Pulping of tropical hardwoods: individual and mixed species, wood and paper properties, resource assessment. CSIRO Australia, Div. Appl. Chem. Technol Paper No. 70, 22 pp.

  • Hillis, W. E. 1950: Chromatographic analysis of eucalypt kinos. Nature 166: 195–196

    Google Scholar 

  • Hillis, W. E. 1951a: Chromatographic examination of tannin extracts. J. Soc. Leather Tra. Chem. 35: 211–218

    Google Scholar 

  • Hillis, W. E. 1951b: The chemistry of eucalypt kinos. Part I. Aust. J. Appl. Sci., 2: 385–395

    Google Scholar 

  • Hillis, W. E. 1954: Precursors of the red colour in leather. J. Soc. Leather Tra. Chem. 38: 91–102

    Google Scholar 

  • Hillis, W. E. 1956: Leucoanthocyanins as the possible precursors of extractives in woody tissues. Aust. J. Biol. Sci. 9: 263–280

    Google Scholar 

  • Hillis, W. E. 1956: Production of mangrove extract in the delta region of Papua. Empire For. Rev. 35: 420–436

    Google Scholar 

  • Hillis, W. E. 1962: The distribution and formation of polyphenols within the tree. In: Hillis, W. E. (Ed.): Wood extractives, New York: Academic Press. pp. 60–131

    Google Scholar 

  • Hillis, W. E. 1966a: Polyphenols in the leaves of Eucalyptus L'Herit: a chemotaxonomic survey. Phytochemistry 5: 1075–1090; 1967, 6: 259–274; 1967, 6: 275–286; 1967, 6: 373–382; 1967, 6: 845–856

    Google Scholar 

  • Hillis, W. E. 1966b: Variation in polyphenol compositon with species of Eucalyptus L'Herit. Phytochemistry 5: 541–556

    Google Scholar 

  • Hillis, W. E. 1969: The contribution of polyphenolic wood extractives to pulp colour. Appita 23(2): 89–101

    Google Scholar 

  • Hillis, W. E. 1971: Distribution, properties and formation of some wood extractives. Wood Sci. Technol. 5: 272–289

    Google Scholar 

  • Hillis, W. E. 1972: Properties of eucalypt woods of importance to the pulp and paper industry. Appita 26: 113–122

    Google Scholar 

  • Hillis, W. E. 1975: Ethylene and extraneous material formation in woody tissues. Phytochemistry 14: 2559–2562

    Google Scholar 

  • Hillis, W. E. 1975: Secondary changes in wood. In: Loewus, F. A.; Runeckles, V. C. (Eds.): Recent advances in phytochemistry, New York: Plenum 11: 247–309

    Google Scholar 

  • Hillis, W. E.; Carle, A. 1958: The polyphenols and shikimic acid and eucalypt cambium and wood. Holzforschung 12: 136–141

    Google Scholar 

  • Hillis, W. E.; Carle, A. 1959: The influence of extractives on eucalypt pulping and paper making. J. Aust. Pulp Paper Ind. (Appita) 13: 74–83

    Google Scholar 

  • Hillis, W. E.; Carle, A. 1960: The formation of phenolic substances in Eucalyptus gigantea and Eucalyptus sieberiana. Biochem. J. 74: 607–615

    Google Scholar 

  • Hillis, W. E.; Carle, A. 1962: The origin of the wood and bark polyphenols of Eucalyptus species. Biochem. J. 82: 435–439

    Google Scholar 

  • Hillis, W. E.; de Silva, D. 1979: Inorganic extraneous constituents of woods. Holzforschung 33: 47–53

    Google Scholar 

  • Hillis, W. E.; Hasegawa, M. 1962a: Biosynthesis of hydroxystilbenes. Chem. Ind. (London): 1330–1331

  • Hillis, W. E.; Hasegawa, M. 1962b: The polyphenols in leaves of Eucalyptus sideroxylon. Biochem. J. 83: 503–506

    Google Scholar 

  • Hillis, W. E.; Horn, D. H. S. 1965: Nuclear magnetic resonance spectra and structure of some C-glycosylflavonoids. Aust. J. Chem. 18: 531–542

    Google Scholar 

  • Hillis, W. E.; Inoue, T. 1968: Formation of polyphenols in trees. IV. The polyphenols formed in Pinus radiata after Sirex attack. Phytochemistry 7: 13–22

    Google Scholar 

  • Hillis, W. E.; Ishikura, N. 1970: The biosynthesis of polyphenols in tissues with low phenylalanine ammonia lyase activity. Phytochemistry 9: 1517–1528

    Google Scholar 

  • Hillis, w. E.; Isoi, K. 1965: The biosynthesis of polyphenols of Eucalyptus species. Phytochemistry 4: 905–918

    Google Scholar 

  • Hillis, W. E.; Orman, H. R. 1962: The extractives of New Zealand Nothofagus species. J. Linn. Soc. (Bot.) 58: 175–184

    Google Scholar 

  • Hillis, W. E.; Urbach, G.: The reaction of (+)-catechin with formaldehyde. J. Appl. Chem. 1959, 9: 474–482: Reaction of polyphenols with formaldehyde. J. Appl. Chem. 1959, 9: 665–673

    Google Scholar 

  • Hillis, W. E.; Yazaki, Y. 1973: Polyphenols of Intsia heartwoods. Phytochemistry 12: 2491–2495

    Google Scholar 

  • Hillis, W. E.; Yazaki, Y. 1973: Wood polyphenols of Eucalyptus polyanthemos. Phytochemistry 12: 2969–2979

    Google Scholar 

  • Hillis, W. E.; Yazaki, Y.; Bauch, J. 1976: The significance of anomalous extractives in heartshakes in Dacrydium species. Wood Sci. Technol. 10: 79–95

    Google Scholar 

  • Howes, F. N. 1949: Vegetable gums and resins. Waltham, Mass. Chronica Botanica Co. 188 pp.

    Google Scholar 

  • Howes, F. N. 1950: Age-old resins of the Mediterranean region and their uses. Economic Botany 4(4): 1307–1316

    Google Scholar 

  • Jacques, D.; Opie, C. T.; Porter, L. J.; Haslam, E. 1977: Plant proanthocyanidins, Part 4. Chem. Soc. Perkin Trans 1(14): 1625–1643

    Google Scholar 

  • Knowles, E.; White, T. 1958: The protection of metals with tannins. J. Oil Colour Chem. Assoc. 41(1): 10–23

    Google Scholar 

  • Krahmer, R. L.; Hemingway, R. W.; Hillis, W. E. 1970: The cellular distribution of lignans in Tsuga heterophylla wood. Wood Sci. Technol. 4: 122–139

    Google Scholar 

  • Langenheim, J. H. 1969: Amber: A botanical inquiry. Science 163: 1157–1169

    Google Scholar 

  • MacKenzie, A. W.; Pearson, A. J.; Stephens, J. P. 1968: Removal of blockages. Appita 21(2): XIX-XX

    Google Scholar 

  • McKenzie, W. M.; Hillis, W. E. 1965: Evidence of chemical acceleration of wear in cutting plant materials. Wear 8: 238–243

    Google Scholar 

  • Mantell, C. L.; Kopf, C. W.; Curtis, J. L.; Rogers, E. M. 1942: The Technology of Natural Resins. New York: John Wiley. 506 pp.

    Google Scholar 

  • Morgan, J. W. W.; Orsler, R. J. 1968: The chemistry of colour changes in wood. Holzforschung 22: 11–16

    Google Scholar 

  • Mutton, D. B. 1962: Wood resins. In: Hillis, W. E. (Ed.): Wood Extractives. New York, London: Academic Press. pp. 331–363

    Google Scholar 

  • Nelson, N. D. 1978: Xylem ethylene, phenol-oxidising enzymes and nitrogen and heartwood formation in walnut and cherry. Can. J. Botany 56: 626–634

    Google Scholar 

  • Nelson, N. D.; Hillis, W. E. 1978: Genetic and biochemical aspects of kino vein formation in Eucalyptus. Aust. For. Res. 8: 75–91

    Google Scholar 

  • Nelson, P. J.; Hemingway, R. N. 1971: Resin in bisulphite pulp from Pinus radiata and its relation to pitch troubles. Tappi 54: 968–991

    Google Scholar 

  • Nobuchi, T.; Harada, H. 1983: Physiological features of the ‘white zone’ of sugi (Cryptomeria japonica). Mokuzai Gakkaishi 29: 824–832

    Google Scholar 

  • Nobuchi, T.; Sato, T.; Iwata, R.; Harada, H. 1984: Season of heartwood formation and the related cytological structure of ray parenchyma cells in Robinia pseudoacacia. Mokuzai Gakkaishi 30: 628–636

    Google Scholar 

  • Ohtani, Y.; Tachibana, S., Sumimoto, M. 1980: Studies on pitch troubles caused by pulping and bleaching of tropical woods Part 7. Mokuzai Gakkaishi 26: 534–542

    Google Scholar 

  • Ohtani, Y.; Sumimoto, M. 1981: Studies on pitch troubles caused by pulping and bleaching of tropical woods Part 10. Mokuzai Gakkasihi 27: 302–310

    Google Scholar 

  • Opie, C. T.; Porter, L. J.; Haslam, E. 1977: Plant proanthocyanidins Part 5. Phytochemistry 16: 99–103

    Google Scholar 

  • Oye, R.; Langfors, N. G.; Phillips, F. H.; Higgins, G. G. 1977: The properties of kraft black liquors from various eucalypts and mixed tropical hardwoods. Appita 31: 33–40

    Google Scholar 

  • Pefold, A. R.; Willis, J. L. 1961: The Eucalypts. New York: Interscience Publishers Inc. 245–281

    Google Scholar 

  • Perkin, A. G.; Everest, A. E. 1918a: The Natural Organic Colouring Matters. London: Longmans, Green & Co. 655 pp

    Google Scholar 

  • Perkin, A. G.; Everest, A. E. 1918b: The Natural Organic Colouring Matters. London: Longmans, Green & Co. p. 4

    Google Scholar 

  • Pigman, W.; Anderson, E.; Fischer, R.; Buchanan, M. A.; Browning, B. L. 1953: Color precursors in spruce and western hemlock woods and inner barks. Tappi 36: 4–12

    Google Scholar 

  • Pizzi, A. 1983: Tannin-based wood adhesives. In: A. Pizzi (Ed.): Wood Adhesives. Chemistry and Technology. New York: Marcel Dekker 177–246

    Google Scholar 

  • Plomley, K. F.; Gottstein, J. W.; Hillis, W. E. 1957: Tannin-formaldehyde adhesives. CSIRO, Forest Products Newsletter 234: 6–8

    Google Scholar 

  • Plomley, K. F.; Hillis, W. E.; Hirst, K. 1976: The influence of wood extractives on the gluewood bond. Holzforschung 30: 14–19

    Google Scholar 

  • Rao, Ramesh K. 1983: Role of wood and plant anatomy in archeological studies of prehistoric India. J. Indian Acad. Wood Sci. 14(1): 1–8

    Google Scholar 

  • Record, S. J.; Hess, R. W. 1943: Timbers of the new world. New Haven: Yale University Press. 640 pp.

    Google Scholar 

  • Reed, A. H. 1954: The story of the kauri. Wellington, New Zealand: A. H. and A. W. Reed Press. 299 pp.

    Google Scholar 

  • Reich, R. B. 1984: The next american frontier. Penguin Books, USA. 324 pp.

    Google Scholar 

  • Robinson, G. M.; Robinson, R. 1933: A survey of anthocyanins Part III. Biochem. J. 27: 206–212

    Google Scholar 

  • Roux, D. G. 1963: Red coloration of some condensed tannins caused by sunlight. Das Leder 14: 179–182

    Google Scholar 

  • Roux, D. G.; Drewes, S. E. 1965: Structural factors associated with the redness induced in certain condensed tannins by sunlight or heat. Chem. Ind. (Aug 14): 1442–1446

  • Roux, D. G.; Ferreira, D. 1982: The direct biomimetic synthesis, structure and absolute configuration of angular and linear condensed tannins. Progress Chem. Org. Nat. Prod. 41: 47–76

    Google Scholar 

  • Rudloff, E.; Jorgensen, E. 1963: Biosynthesis of pinosylvin in the sapwood of Pinus resinosa. Phytochemistry 2: 297–301

    Google Scholar 

  • Sanderman, W.; Puth, M. 1965: Einfluß von Holzstruktur u. Holzinhaltsstoffen auf die Witterungsbeständigkeit unpigmentierter Lackfilme. Farb u. Lack 71: 13–25

    Google Scholar 

  • Seikel, M. K.; Hillis, W. E. 1970: Hydrolysable tannins of Eucalyptus delegatensis wood. Phytochemistry 9: 1115–1128

    Google Scholar 

  • Shain, L.; Hillis, W. E. 1972a: Ethylene production in Pinus radiata in response to Sirex-Amylostereum attack. Phytopathology 62: 1407–1409

    Google Scholar 

  • Shain, L.; Hillis, W. E. 1972b: Ethylene production in xylem of Pinus radiata in relation to heartwood formation. Can. J. Bot. 51: 1331–1335

    Google Scholar 

  • Shaw, N. 1914: Chinese forest trees and timber supply. London: T. Fisher Unwin. 351 pp.

    Google Scholar 

  • Shigo, A. L.; Hillis, W. E. 1973: Heartwood, discolored wood and micro-organisms in living trees. Ann. Rev. Phytopathology 11: 197–222

    Google Scholar 

  • Stafford, H. A. 1983: Enzymic regulation of procyanidin biosynthesis; lack of a flav-3-on-3-ol intermediate. Phytochemistry 22: 2643–2646

    Google Scholar 

  • Swain, T. 1963: Editor ‘Chemical Plant Taxonomy’. London, New York: Academic Press. pp. 145

    Google Scholar 

  • Swain, T.; Hillis, W. E. 1959: Studies on the phenolic constituents of Victoria plum. Part I. J. Sci. Food Agric. 10: 63–68

    Google Scholar 

  • Tachibana, S.; Sumimoto, M.; Kondo, T. 1976: Studies on pitch troubles caused by pulping and bleaching of tropical woods. Part 2. Mokuzai Gakkaishi 22: 258–263

    Google Scholar 

  • Tachibana, S.; Sumimoto, M. 1978: Studies on pitch troubles caused by pulping and bleaching of tropical woods. Part 3. Mokuzai Gakkaishi 24: 575–582

    Google Scholar 

  • Tachibana, S.; Sumimoto, M. 1979: Studies on pitch troubles caused by pulping and bleaching of tropical woods. Part 5. Mokuzai Gakkaishi 25: 726–742

    Google Scholar 

  • Tachibana, S.; Sumimoto, M. 1980: Studies on pitch troubles caused by pulping and bleaching of tropical woods. Part 6. Holzforschung 34: 131–137

    Google Scholar 

  • Tachibana, S.; Sumimoto, M. 1982: Studies on pitch troubles caused by pulping and bleaching of tropical woods. Part 13. Mokuzai Gakkaishi 28: 452–462

    Google Scholar 

  • Tindale, M. D.; Roux, D. G. 1974: An extended phytochemical survey of Australian species of Acacia. Phytochemistry 13: 829–839

    Google Scholar 

  • Trabut, M. 1901: Sur la manne de l'olivier. Comptes rendues Academie des Sciences, Paris 132: 225–226

    Google Scholar 

  • Tsai, G. S. C., Klamecki, B. E. 1980: Separation of abrasive and electrochemical tool wear mechanisms in wood cutting. Wood Sci. 12: 236–242

    Google Scholar 

  • Tudge, C. 1981: The state of rubber. New Scientist, 9 July: 78–81

    Google Scholar 

  • White, T. 1949: Solubility and other studies on quebracho tannin extract. J. Soc. Leather Trades Chem. 33: 39–52

    Google Scholar 

  • White, T. 1957: Tannins — their occurrence and significance. J. Sci. Food Agric. 8(7): 377–385

    Google Scholar 

  • Winsor, K. 1979: Forever Amber. London: MacDonald and Jones. pp. 800

    Google Scholar 

  • Wolter, K. E.; Zinkel, D. F. 1984: Observations on the physiological mechanisms and chemical constituents of induced oleoresin synthesis in Pinus resinosa. Can. J. For. Res. 14: 452–458

    Google Scholar 

  • Yazaki, Y. 1983: Ultrafiltration of extractions from Pinus radiata bark. Holzforschung 37: 87–90

    Google Scholar 

  • Yazaki, Y.; Hillis, W. E. 1977: Polyphenolic extractives of Pinus radiata bark. Holzforschung 31: 20–25

    Google Scholar 

  • Yazaki, Y.; Hillis, W. E. 1980: Molecular size distribution of radiata pine bark extracts and its effect on properties. Holzforschung 34: 125–130

    Google Scholar 

  • Yazaki, Y.; Hillis, W. E.; Collins, P. J. 1979: Purification of bark and wood extracts for wood adhesives. Australian Patent Applic. PD 8616/79. May

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The Academy Lecture presented on 24 April, 1985 at Pretoria, South Africa to Fellows of the International Academy of Wood Science and participants of the Symposium ‘Forest Products Research International — Achievements and the Future’. The Lecture was illustrated with many coloured slides and is condensed in this publication. Reprints of the unabridged version are available from the author

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Hillis, D.W.E. Forever amber a story of the secondary wood components. Wood Sci.Technol. 20, 203–227 (1986). https://doi.org/10.1007/BF00350978

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