Silver birch

Silver birch Betula pendula, B. pubescens, B. nana, B. alleghaniensis, B. populifolia, B. papyriferia, B. lenta Tannins... 

Zaman, A., Alen, R. and Kotilainen, R. (2000) Thermal behaviour of Scots pine Pinus sylvestris) and silver birch (Betula pubescens) at 200-230 deg C. Wood and Fiber Science, 32(2), 138-143. 

In good agreement with the order of the systematic taxa, the next level of similarity revealed by HCA is that of plant families, as illustrated by the examples of the Birch and of the Soapberry families (Betulaceae and Sapin-daceae). Silver birch (genus Betula) and Hophornbeam (genus Ostrya) are members of the Birch family (Betulaceae), and their spectra form one of the three main data clusters. Sycamore Maple, Norway Maple and Horse-chestnut are all members of the Soapberry family (Sapindaceae), and are also contained in one group. 

Sandnes, A., Eldhuset, T. D. Wollebcek, G. (2005). Organic acids in root exudates and soil solution of Norway spruce and silver birch. Soil Biology and Biochemistry,... 

On the way home through the woods, I noticed that some leaves had already fallen and the nettles were dusty. I leaned on the papery trunk of a silver birch and closed my eyes. My neglected studies, the rose in the laboratory, and the prison that Selden had become dragged at me like a heavy cloak. Then there was movement on the track behind me, and suddenly Aislabie walked out of my longings and into the Selden woods as if I had conjured him up. He had slung his red coat over his shoulder, and his boots shone. I clutched the tree and stared stupidly up at his smiling face. 

Among the species referred to in Table III, only trembling aspen has given almost quantitative jdelds of (4-0-methylglucurono)xylans, - whereas the relative amounts obtainable from American elm are conspicuously low. (4-0-Methylglucurono)xylans have been isolated from white birch and silver birch in yields close to, or exceeding, 30% of the wood. 

Betula verrucosa Silver birch Chlorine holocellulose, methyl sulfoxide 13 200... 

Few investigations have been carried out with native 0-acetyl-(4-0-methylglucurono)xylans. One such polysaccharide, from wood of white birch, has been reported to have a degree of polymerization of 180, as estimated from measurements of osmotic pressure on the fully acetylated polymer. A similar polysaccharide from wood of silver birch had a P value of 200 10, determined by osmotic-pressure measurements on an aqueous solution. 

OCN European white birch silver birch weeping birch... 

Inspection of Defect Detection Trials Plates 1 and 2 by the Materials Physics Department, R.N.L.". Presented at the UK AEA Symposium on the Defect Deletion Trials held at Silver Birch Conference Centre, Blrchwood, Warrington, 7/8 October 1982. 

Table 3A.5 Typical composition of silver birch Betula pendula) and Norway spruce (Piceaabies) acid sulfite spent liquors (kg/ton pulp) ...

Table 3A.6 Chemical composition of soluble organic dry matter during alkaline pretreatment of silver birch (Betulapendula) (% of initial dry matter) Component e 8 ...

Polyprenols of higher plants have mostly been isolated from leaves solanesol (C45) was first obtained in 1956 from tobacco leaves. However, their occurrence in certain woody tissues has been demonstrated. Silver birch (Betula verrucosa) wood has been shown to contain fatty acid esters of betulaprenols -6 to -9 the major polyprenol, betulaprenol-7 has the structure cu-T-T-C-[C]2-C-OH (573) the poli renols from the leaves were free, and the major component had 11 isoprene units (188, 256). 

Recent research in 18 other hardwoods (and in pine) has shown the possibility to assess the vitality of other tree species of the Northern hemisphere in the same way as reported here for beech as an example. There are to take into account only little species-dependant modifications. This research has been finished now for Silver Birch, Pubescent Birch (ROLOFF 1989a, WESTMAN 1989), Norway maple. Sycamore, Sugar maple. Horse-chestnut, Black alder. Hornbeam, European Ash, American Beech, Scotch pine. Wild cherry. Sessile oak, English oak. False acacia. Common willow. Small-leaved lime and Large-leaved lime (ROLOFF 1989a). 

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