Results 91 to 100 of about 24,151 (223)
Decomposition of coarse woody debris in a long-term litter manipulation experiment: A focus on nutrient availability [PDF]
, 2018 The majority of above-ground carbon in tropical forests is stored in wood, which is returned to the atmosphere during decomposition of coarse woody debris.
Gora, Evan M. +3 more
core +3 more sources
Origin and characterisation of the extractable colour of oak heartwood used for ageing spirits
Journal of Wood Science, 2020 In this study, investigation is focused on the soluble part of oak heartwood colour, with the objective of defining its impact on the colour of spirits after a barrel ageing.
Nicolas Vivas +4 more
doaj +1 more source
X-ray based tree ring analyses [PDF]
, 2004 In this thesis, two x-ray based dendro-analyses (batch-wise microdensitometry and energy dispersive x-ray fluorescence (EDXRF)) and the conditions under which these methods could be used on the two typical boreal conifers Norway spruce (Picea abies (L ...
Lindeberg, Johan
core
Living on borrowed time – Amazonian trees use decade‐old storage carbon to survive for months after complete stem girdling [PDF]
, 2018 Nonstructural carbon (NSC) reserves act as buffers to sustain tree activity during periods when carbon (C) assimilation does not meet C demand, but little is known about their age and accessibility; we designed a controlled girdling experiment in the ...
Brugnoli +37 more
core +2 more sources
Chemistry of Heartwood Formation
Mokuzai Gakkaishi, 2012 樹木が10年程の齢に達すると，幹や枝などにおいてその中心部から心材が形成される。心材の特性が色調・におい・耐久性など木材の諸性質を左右するといった木材利用上の興味に加え，樹木が心材を形成する意義の理解ならびに心材形成の機構の解明といった植物基礎科学的な興味が，長い間研究者を心材研究・心材形成研究へと向かわせてきた。心材形成は生物学的・化学的・物理学的変化を伴う複雑な樹木生理現象である。中でも化学的な変化となる，心材に特有な物質すなわち心材成分の新生・堆積は，これら化合物自体が色・におい・対生物活性を持つことが多いため，直接的に心材特性の発現に結び付けられ得る，心材形成時の最も顕著な変化現象と言えよう。本総説では心材形成について，主に「心材成分の堆積」に着眼して生理学的見地，生化学的見地，組織（化 ...
openaire +2 more sources
Effects of potassium/sodium fertilization and water availability on wood properties of Eucalyptus grandis trees [PDF]
, 2019 In Brazil. most Eucalyptus plantations are located in regions experiencing periods of water shortage where fertilizers such as potassium (K) are intensively used to achieve high productivity. Recently.
Chaix, Gilles +2 more
core
NATURAL DURABILITY AND PHENOLIC CONTENT IN DRIED SCOTS PINE HEARTWOOD
BioResources, 2010 The durability of Scots pine heartwood has previously been shown to be affected by the industrial drying process of sawn lumber. The durability of heartwood from boards dried at temperatures between 20°C-110°C was studied by measuring the mass loss in a ...
Margot Sehlstedt-Persson, Olov Karlsson
doaj
Further tests for termite resistance of Finnish pine heartwood.
Silva Fennica, 1986 The natural resistance of Finnish-grown L. heartwood to termites was tested in Zambia in graveyard conditions. The heartwood exhibited some natural resistance but durability was, however, far from practical immunity.
Löyttyniemi, Kari, Uusvaara, Olli
doaj +1 more source
Coffee and Cocoa Research Journal, 2018 Shade-trees with energy use in coffee plantations are an important alternative to increase profitability in groforestry systems. The aim of this study was to investigate gross calorific value (GCV) of 15 shade-tree species in coffee plantations in Costa ...
Roger Moya +2 more
doaj +1 more source
, 2017 We develop a 3D porous medium model for sap flow within a tree stem, which consists of a nonlinear parabolic partial differential equation with a suitable transpiration source term. Using an asymptotic analysis, we derive approximate series solutions for
Janbek, Bebart Maisar, Stockie, John M.
core