Current issue: 56(2)

Under compilation: 56(3)

Scopus CiteScore 2021: 2.8
Scopus ranking of open access forestry journals: 8th
PlanS compliant
Silva Fennica 1926-1997
1990-1997
1980-1989
1970-1979
1960-1969
Acta Forestalia Fennica
1953-1968
1933-1952
1913-1932

Articles containing the keyword 'kutistuminen'

Category: Article

article id 5277, category Article
Kirsi Maasalo. (1986). Pihlajan puuaineen ominaisuuksia. Silva Fennica vol. 20 no. 3 article id 5277. https://doi.org/10.14214/sf.a15456
English title: Properties of the wood of the rowan tree (Sorbus aucuparia).
Original keywords: puuaines; puuaineen tiheys; taivutuslujuus; puristuslujuus; kutistuminen; kotipihlaja; kuoren tiheys
English keywords: wood properties; bark; basic density; shrinkage; bending strength; compression strength; rowan; Sorbus aucuparia
Abstract | View details | Full text in PDF | Author Info

The basic density of the wood of the rowan tree (Sorbus aucuparia L.) is almost the same along the stem but that of the bark is increasing along the stem. The moisture content of the wood and of the bark is increasing along the stem. Its strength in the bending and in the compression is high. The volume shrinkage is high.

The PDF includes an abstract in Finnish

  • Maasalo, E-mail: km@mm.unknown (email)
article id 5238, category Article
Matti Kärkkäinen. (1985). Suomalaisen kuusen puuaineen vertailua Keski-Euroopassa kasvaneiden kuusi- ja jalokuusilajien puuaineeseen. Silva Fennica vol. 19 no. 2 article id 5238. https://doi.org/10.14214/sf.a15417
English title: Norway spruce wood grown in Finland compared with spruce and fir wood grown in Central Europe.
Original keywords: puutavara; Suomi; kuuset; puuaines; Keski-Eurooppa; lujuus; puuaineen tiheys; vuosiluston paksuus; kutistuminen
English keywords: Norway spruce; wood properties; density; Picea; sawn goods; Abies; shrinkage; width of growth rings
Abstract | View details | Full text in PDF | Author Info

The aim of this literature review was to compare Finnish Norway spruce (Picea abies (L.) H. Karst.) sawn goods to Central European spruce sawn goods which contain fir in some amount. However, it was found that no statistically valid comparisons have been made. Therefore, conclusions have been based mainly on the relationship between various properties and growth rate. According to this analysis, most properties of Finnish spruce are better, although small in practice.

The PDF includes a summary in English.

  • Kärkkäinen, E-mail: mk@mm.unknown (email)

Category: Article

article id 7118, category Article
Paavo J. Ollinmaa. (1959). Reaktiopuututkimuksia. Silva Fennica vol. 72 no. 1 article id 7118. https://doi.org/10.14214/aff.7118
English title: Study on reaction wood.
Original keywords: kuusi; mänty; havupuut; kataja; haapa; reaktiopuu; vetopuu; lujuus; leppä; kutistuminen; lehtipuut; lylypuu; ligniini
English keywords: Populus tremula; Pinus sylvestris; Norway spruce; Picea abies; Scots pine; compression wood; lignin; mechanical strength; Alnus incana; tension wood; shrinkage; Juniperus communis; raction wood; common juniper
Abstract | View details | Full text in PDF | Author Info

Compression wood of the tree species studied in this investigation, Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) Karst.) and common juniper (Juniperus communis L.), was found to be characterized in its cross section by the thick walls and rounded shape of its tracheids and the profuse occurence of spaces. Tension wood of aspen (Populus tremula L.) and alder (Alnus incana (L.) Moench) was found in microscopic examination to be characterized by the gelatinous appearance of the wood fibres, by its small cell cavities and by the thickness and buckling of the inner layer of the cecondary wall. Tracheids of the compression wood were found to have shorter length than normal on an average, while the tension wood fibres were found to be longer.

The microchemical studies suggest a higher than normal lignin content in compression wood and lower than normal lignin content in tension wood, as compared to normal wood. The reverse would be true for the cellulose contents. Volume weight of absolute dry reaction wood was distinctly higher than that of normal wood. The longitudinal shrinkage of reaction wood, particularly of compression wood, is several times that of normal wood. Transversal shrinkage of compression wood is much less than normal wood. Swelling tests revealed pushing effect of compression wood on elongation and pulling effect on tension wood on constraction. Volume shrinkage of compression wood is less than that of normal wood, in contrast to tension wood. The strength of compression wood in absolutely dry condition was nearly same as that of normal wood.

The PDF includes a summary in English.

  • Ollinmaa, E-mail: po@mm.unknown (email)

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content
Your selected articles