SwePub
Tyck till om SwePub Sök här!
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "LAR1:lnu srt2:(2000-2004)"

Sökning: LAR1:lnu > (2000-2004)

  • Resultat 1-10 av 2816
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  •  
3.
  • Adamopoulos, Stergios, et al. (författare)
  • Dimensional changes of extracted and non-extracted small wood specimens of black locust (Robinia pseudoacacia L.)
  • 2003
  • Ingår i: European Journal of Wood and Wood Products. - : Springer. - 0018-3768 .- 1436-736X. ; 61:4, s. 264-268
  • Tidskriftsartikel (refereegranskat)abstract
    • From straight grained heartwood of black locust (Robinia pseudoacacia L.), specimens, 3 cm×3 cm in cross section and 0.5 mm (or 10 mm) in axial direction, were cut and used for the determination of dimensional changes and the rate of tangential swelling. Mean radial, tangential and axial shrinkage was 5.30%, 6.67% and 0.16%, respectively, while the coefficient of anisotropy was 1.26. Half of the specimens for the determination of the rate of tangential swelling were extracted for 48 h with distilled hot water. The tangential dimensional change and the time taken to attain half maximum swelling in air-dry and oven-dry specimens were assessed according to a common technique. Extractive removal resulted in an increase of the total magnitude of tangential swelling in both air-dry and oven-dry specimens. However, no significant differences in time taken to attain half maximum swelling between air-dry and oven-dry specimens were observed after extraction. The rate of tangential swelling was lower in air-dry specimens than in oven-dry specimens after 30 min of immersion in water when were non-extracted and after 5 min of immersion in water when were extracted. Extracted air-dry specimens had a greater rate of tangential swelling than non-extracted air-dry specimens and the same occurred for oven-dry specimens. Extraction resulted in a higher diffusion coefficient for air-dry specimens. The diffusion coefficient calculated for non-extracted air-dry specimens (0.901×10−4 cm2/min) showed that black locust is a difficult species to impregnate.
  •  
4.
  • Adamopoulos, Stergios (författare)
  • Flexural properties of black locust (Robinia pseudoacacia L.) small clear wood specimens in relation to the direction of load application
  • 2002
  • Ingår i: European Journal of Wood and Wood Products. - : Springer. - 0018-3768 .- 1436-736X. ; 60:5, s. 325-327
  • Tidskriftsartikel (refereegranskat)abstract
    • Values of pure moduli of elasticity (PMOE), experimental modulus of elasticity (MOE) in static bending and moduli of rigidity (GLR, GLT) were calculated in juvenile and mature black locust defect-free small wood specimens after loading in static bending alternately on true radial and tangential surfaces. For both juvenile and mature specimens, no significant differences (t-test, 95% probability level) were found between the radial and tangential moduli of elasticity and rigidity. Values of PMOE were found to be 27–32% higher than the corresponding values of MOE at the 15:1 span-to-depth ratio.
  •  
5.
  • Adamopoulos, Stergios (författare)
  • Influence of hot-water extractives on radial and tangential shrinkage of black locust wood (Robinia pseudoacacia L.)
  • 2002
  • Ingår i: European Journal of Wood and Wood Products. - : Springer. - 0018-3768 .- 1436-736X. ; 60:5, s. 377-378
  • Tidskriftsartikel (refereegranskat)abstract
    • IntroductionRemoval of extractives increases the shrinkage and swelling of wood (Nearn 1955, Salamon and Kozak 1968, Cooper 1974, Taylor 1974). The effect of progressive extraction on the above properties has not been investigated much. In oak (Quercus conferta L.), a forest species rich in extractives, the shrinkage progressively increased with progressive extraction (Voulgaridis et al. 1980). In black locust (Robinia pseudoacacia L.), much of the main-stem volume is comprised of heartwood, characterized by the presence of dark yellow-brown extractives. While the extractives of black locust give the heartwood its distinctive color and decay resistance, they comprise only 6.2 to 8.3% of the dry weight of the main stem (Stringer 1992). Hot-water extractives range from 5.2 to 8.6% (Hart 1968, So et al. 1980). The present study was primarily undertaken to determine whether the progressive removal of hot-water extractives affects the radial and tangential shrinkage of black locust heartwood.
  •  
6.
  •  
7.
  • Adamopoulos, Stergios, et al. (författare)
  • Within-tree variation in growth rate and cell dimensions in the wood of black locust (Robinia pseudoacacia)
  • 2002
  • Ingår i: IAWA Journal. - : Brill Academic Publishers. - 0928-1541 .- 2294-1932. ; 23:2, s. 191-199
  • Tidskriftsartikel (refereegranskat)abstract
    • Black locust (Robinia pseudoacacia L.) is regarded as an important natural resource almost throughout the world but relatively little is known about the within-tree variability of the anatomical characteristics of its wood. Discs 2 cm thick were cut at 2.25 m intervals, from the ground level to the top from ten black locust trees, 18–37-years-old, from the University Forest of Taxiarchi, Chalkidiki, Greece. The discs were used for the determination of growth rate and cell dimensions (fiber length and vessel member length and diameter) and their withintree variability (radial, oblique, vertical). Growth rate increased within the first 5–9 growth rings from the pith and then gradually decreased. Oblique variation of growth rate did not exhibit any clear tendency but a decrease at the top. In the case of vertical variation, growth rate decreased gradually with the year of cambium formation. Radial variability curves were found to be typical for the dimensions of cells (fibers, vessel members) especially for the fiber length. A rapid increase in cell dimensions was observed in the first 7–11 growth rings, the juvenile zone. Oblique and vertical variation of cell dimensions did not exhibit any clear tendencies.
  •  
8.
  •  
9.
  •  
10.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 2816
Typ av publikation
tidskriftsartikel (1159)
konferensbidrag (666)
bokkapitel (333)
rapport (222)
doktorsavhandling (107)
bok (93)
visa fler...
recension (77)
annan publikation (62)
samlingsverk (redaktörskap) (41)
konstnärligt arbete (28)
licentiatavhandling (20)
proceedings (redaktörskap) (14)
forskningsöversikt (11)
patent (6)
visa färre...
Typ av innehåll
refereegranskat (1468)
övrigt vetenskapligt/konstnärligt (1114)
populärvet., debatt m.m. (229)
Författare/redaktör
Nicholls, Ian Alan (68)
Carlsson, Bo (51)
Hanson, K. (40)
Granéli, Edna (39)
Carius, Staffan (33)
Golub, Koraljka (32)
visa fler...
Biron, A. (29)
Richter, S. (28)
Bai, X. (28)
Barwick, S. W. (28)
Halzen, F. (28)
Karle, A. (28)
Morse, R. (28)
Schmidt, T. (28)
Hallgren, A. (28)
Bertrand, D. (28)
Hardtke, R. (28)
Hundertmark, S. (28)
Lindahl, P. (28)
Chirkin, D. (27)
Price, P. B. (27)
Rawlins, K. (27)
Spiering, C. (27)
Jacobsen, J. (27)
Hulth, P. O. (27)
Solarz, M. (27)
Niessen, P. (27)
Kowalski, M. (26)
Cowen, D. F. (26)
Desiati, P. (26)
Rhode, W. (26)
Botner, O. (26)
Leich, H. (26)
Silvestri, A. (26)
Hellwig, M. (26)
Gustafsson, Jörgen (26)
Feser, T. (26)
Leuthold, M. (26)
Sander, H. G. (25)
Goldschmidt, A. (25)
Madsen, J. (25)
Nygren, D. R. (25)
Walck, C. (25)
Becker, K. -H (25)
Schneider, D. (25)
Conrad, J. (25)
Ross, D. (25)
Bouchta, A. (25)
Steffen, P. (25)
Cooley, J. (25)
visa färre...
Lärosäte
Linnéuniversitetet (2816)
Lunds universitet (162)
Linköpings universitet (74)
Jönköping University (73)
Uppsala universitet (37)
Mittuniversitetet (32)
visa fler...
Göteborgs universitet (25)
Karolinska Institutet (25)
Stockholms universitet (21)
Umeå universitet (20)
Blekinge Tekniska Högskola (18)
Kungliga Tekniska Högskolan (17)
Södertörns högskola (17)
RISE (15)
Malmö universitet (11)
Mälardalens universitet (9)
Karlstads universitet (9)
Högskolan Kristianstad (8)
Högskolan i Halmstad (8)
Högskolan i Borås (6)
Luleå tekniska universitet (5)
Högskolan Dalarna (5)
Chalmers tekniska högskola (4)
Örebro universitet (3)
Marie Cederschiöld högskola (3)
Högskolan Väst (2)
Konstfack (2)
Högskolan i Skövde (2)
Högskolan i Gävle (1)
Handelshögskolan i Stockholm (1)
visa färre...
Språk
Engelska (1883)
Svenska (805)
Tyska (47)
Franska (22)
Danska (18)
Kroatiska (17)
visa fler...
Spanska (9)
Nygrekiska (4)
Italienska (3)
Arabiska (3)
Portugisiska (2)
Finska (1)
Polska (1)
Nederländska (1)
visa färre...
Forskningsämne (UKÄ/SCB)
Samhällsvetenskap (575)
Humaniora (407)
Naturvetenskap (310)
Medicin och hälsovetenskap (143)
Teknik (139)
Lantbruksvetenskap (65)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy