Tannins eucalyptus

Amao MB, Cano A, Alcolea JF and Acosta M. 2001b. Identification of hydrolysable tannins in the reaction zone of Eucalyptus nitens wood by high performance liquid chromatography-electrospray ionisation mass spectrometry. Phytochem Anal 12(2) 120—127. 

A Hindgut fermenter, eats only Eucalyptus sp. D High fecal nitrogen levels may be due to tannins. 

Cork, S.J. and Krockenberger, A.K. 1991. Methods and pitfalls of extracting condensed tannins and other phenolics from plants Insights from investigations on Eucalyptus leaves. J. Chem. Ecol. 17 123-134. 

Applications for cold-setting, wood-laminating adhesives initially followed the same approach (47) used for laminating resins from western hemlock (38) (i.e., reaction of tannin with phenol-resorcinol-formaldehyde prepolymers). Improvements resulted through the application of Kreibich s Honeymoon technique (48) wherein one side of the material to be bonded is treated with resin and the other with catalyst. One of the preferred systems (49) was phenol-resorcinol-formaldehyde or tannin-resorcinol-formaldehyde at pH 8 with extra paraformaldehyde on the A-side and tannin at 53% solids or tannin-resorcinol-formaldehyde at pH 12 on the B-side. Such resin systems are currently used to laminate eucalyptus or pine in most South African timber-laminating plants. 

Ellagic acid (62), isolated from the kino of Eucalyptus maculata Hook,85 has also been prepared by sodium persulfate oxidation of gallic acid and by acid hydrolysis of crude tannin from walnuts.86,87... 

There are a few minor wood-based chemical industries. After chestnut blight wiped out the American chestnut, U.S. tannin production essentially ceased. The main natural tannins, watde and quebracho, are now imported. High U.S. labor costs and the advent of synthetic tannins make re-establishment of a U.S. tannin industry unlikely. Tannins are used in oil-weU drilling muds. Tree exudates are a continuing wood-based chemical industry. Tree exudates include mbber, tme carbohydrate gums (eg, acacia gum), kinos (eg, the phenolic exudates from eucalyptus), balsams (eg, Storax from l iquidambar spp.), and many different types of oleoresins (mixtures of a soHd resin and a liquid essential oil). The most important oleoresin stiU collected in the United States is pine gum (rosin plus turpentine). 

Eucalyptus. Cum wood Australian fever tree blue-gum tree. Dried leaves of Eucalyptus globulus Labill., Myrtoceae this is a dwarf species, known as Malee in Australia, and richest in oil of Eucalyptus. Habit. Australia, cultivated in subtropics, Europe, N. Africa and Southern U.S- Conslit. 1-3% volatile oil, tannin, resins, eucalyptic acid, rutin. 

Seikel, M.K. and Hillis, W.E., Hydrolysable tannins of Eucalyptus deleeatensis wood. Phytochemistry, 9,1115-1128,1970. 

Fox, L. R. and Macauley, B. J. (1977) Insect grazing on Eucalyptus in response to variation in leaf tannins and nitrogen. Oecologia, 29, 145-62. 

The chromatography of phenolic compounds on polyamide was later extensively used for isolation and structure elucidation of various naturally occurring materials [229a]. As examples may be mentioned the tannins of sprucewood bark [248] and Sumac [281] isolation of two hydroxystilbenes from Eucalyptus wandoo [279] resolution of several pharmacologically important plant extracts [294] and of the pigments of beets [613] isolation of various ommochromes [112] and the separation of a mixture of e-rhodomycinone and -isorhodomycinone [100] (see the summarising work of H. Endres and H. Hormann [186]). 

HILLIS, W.E., M. SIEKEL. 1970. Hydrolysable tannins of Eucalyptus delegatensis wood. Phytochemistry 9 1115-1128. 

Cadahia E, Conde E, Garcia-Vallejo MC, Fernandez de Simon B (1996) Gel permeation chromatographic study of the molecular weight distribution of tannins in the wood, bark and leaves of Eucalyptus spp. Chromatographia 42 95-100... 

Yoshida, T., Maruyama, T., Nitta, A. Okuda, T. (1992h). Eucalbanins A, B and C, monomeric and dimeric hydrolysable tannins from Eucalyptus alba. Chemical and Pharmaceutical Bulletin, 40, 1750-1754. 

Fox L R, Macauley B J 1977 Insect grazing on eucalyptus in response to leaf tannins and nitrogen. Oecologia 29 145 — 162... 

Eucalyptus spp.E. resinifera Sm. Myrtaceae Dragon s blood [Variously tannins and flavonoids See Schweppe, 1992] Edwards (1997) Formed as an ant gall... 

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