Results 21 to 30 of about 53,723 (242)

Effects of the position in a stem on the variability of tracheids in spruce (Picea abies /L./ Karst.) with the occurrence of reaction wood

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2010
The paper is aimed at the field of the microscopic structure of wood dealing with the description of the most important anatomic element in softwood – tracheids in a stem with the occurrence of reaction wood.
Vladimír Gryc, Hanuš Vavrčík
doaj   +1 more source

EFFECT OF COMPRESSION WOOD ON SOME CHEMICAL PROPERTIES OF Pinus brutia Ten. LEANING TREES [PDF]

Mesopotamia Journal of Agriculture, 2011
This study was conducted to show the effect of compression wood on some chemical characteristics of brutia pine Pinus brutia Ten. trees growing naturally at Dohuk provenance and to compare it with the normal growing trees (tree leaning type) for four ...
Abdulrazak R. S. Almalah
doaj   +1 more source

Comparative wood anatomy of Korean Viburnum L. (Adoxaceae) and its taxonomic implication [PDF]

PhytoKeys, 2020
Comparative wood anatomy of Viburnum was carried out to understand the differences in wood features amongst the species which might be useful for taxonomic discrimination in the genus.
Balkrishna Ghimire, Dong Chan Son, Beom Kyun Park, Seung-Hwan Oh   +3 more
doaj   +3 more sources

Competition alters predicted forest carbon cycle responses to nitrogen availability and elevated CO₂: simulations using an explicitly competitive, game-theoretic vegetation demographic model [PDF]

Biogeosciences, 2019
Competition is a major driver of carbon allocation to different plant tissues (e.g., wood, leaves, fine roots), and allocation, in turn, shapes vegetation structure.
E. Weng, E. Weng, R. Dybzinski, C. E. Farrior, S. W. Pacala   +4 more
doaj   +1 more source

Disentangle the Causes of the Road Barrier Effect in Small Mammals through Genetic Patterns. [PDF]

PLoS ONE, 2016
Road barrier effect is among the foremost negative impacts of roads on wildlife. Knowledge of the factors responsible for the road barrier effect is crucial to understand and predict species' responses to roads, and to improve mitigation measures in the ...
Fernando Ascensão, Cristina Mata, Juan E Malo, Pablo Ruiz-Capillas, Catarina Silva, André P Silva, Margarida Santos-Reis, Carlos Fernandes   +7 more
doaj   +1 more source

Lignin hygroexpansion in compression and opposite wood - a molecular dynamics study

Wood Science and Technology
Abstract Softwood branches develop compression wood (CW) in the lower parts of the branch, while opposite wood (OW) develops on the upper. These wood types differ in structure at several length scales, among others in the chemical composition of their lignin matrix.
Marie Hartwig-Nair, Alexandr Nasedkin, Klara Hackenstrass, Emiliano De Santis, Sara Florisson, Malin Wohlert   +5 more
openaire   +2 more sources

Microscopic computed tomography aided finite element modelling as a methodology to estimate hygroexpansion coefficients of wood: a case study on opposite and compression wood in softwood branches

Holzforschung, 2023
Abstract Microscopic X-ray computed tomography (XµCT) aided finite element (FE) modelling is a popular method in material science to relate material properties to heterogeneous microstructures. Recently, a methodology was developed for the XµCT aided FE modelling of wood, which characterises the process from specimen preparation to ...
Sara Florisson, Marie Hartwig, Malin Wohlert, Erik Kristofer Gamstedt   +3 more
openaire   +2 more sources

Structure of cellulose in birch phloem fibres in tension wood: an X-ray nanodiffraction study

Plant Methods, 2023
Background To gain a better understanding of bark layer structure and function, especially of the phloem fibres and their contribution to the posture control of trees, it is important to map the structural properties of these cells.
Mira Viljanen, Sampo Muranen, Outi Kinnunen, Sebastian Kalbfleisch, Kirsi Svedström   +4 more
doaj   +1 more source

Microfibril Angles and Crystalline Properties of Reaction Woods in Agathis and Sumatran Pine Woods

Jurnal Sylva Lestari, 2023
The microfibril angles (MFAs), relative crystallinity index (RC), and crystallite width (CrW) of compression wood (CPW), lateral wood (LTW), and opposite wood (OPW) in Agathis (Agathis loranthifolia) and Sumatran Pine (Pinus merkusii) stem wood were ...
Byantara Darsan Purusatama, Fauzi Febrianto, Wahyu Hidayat, Nam Hun Kim   +3 more
doaj   +1 more source

Identification of fossil trunks from Bükkábrány newly installed in the Visitor Centre of the Ipolytarnóc Fossils Nature Reserve (Novohrad – Nógrád Geopark) in Northern Hungary

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2010
The Late Miocene forest was discovered in the opencast lignite mine of Bükkábrány which is situated in the foothills of the Bükk Mountains (NE Hungary). Sixteen stumps were exposed upright in 2007 at their original position. Five stumps were installed in
Vladimír Gryc, Jakub Sakala
doaj   +1 more source