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Showing 1 to 15 of 15 for “"earlywood"”.
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Tensile Properties of Loblolly Pine Strands Using Digital Image Correlation and Stochastic Finite Element Method
… the uncertainties of mechanical properties in earlywood and latewood samples as well as wood strands. The goal of this study was to evaluate the effect of the intra-ring properties and grain angles on the modulus of elasticity (MOE) and ultimate tensile strength (UTS) of different orientation …
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Variation in the Bimodal Precipitation Regime of Southern Nevada, USA Measured in Tree-Ring Isotopes
… the δ13C of α-cellulose in the latewood and earlywood (δ13CDIFF = latewood - earlywood) portions of a tree ring was highly influenced by the fraction (fSUMMER) of summer precipitation (June-September) to previous cool-season precipitation (October - April). The δ13CDIFF is an index that …
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Dendroclimatology of Pinus sylvestris L. in the British Isles
… have been constructed for parameters of earlywood and latewood widths, ring-width, maximum and minimum densities for all sites. The statistical properties of chronologies are related to the latitude and altitude of the sites. Sub-fossil chronologies behave differently to any of the living …
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Exploration of Wood DCB Specimens Using Southern Yellow Pine for Monotonic and Cyclic Loading
… of the stiffness difference between latewood and earlywood growth and the grain angle along the length of the beams. The grain angle and the stiffness difference between latewood and earlywood growth caused the effective stiffness, (ExxI)eff, to vary along the length of the beam. The effective …
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Characterization of Mixed-Mode Fracture Testing of Adhesively Bonded Wood Specimens
… where latewood layers are alternated with earlywood layers, often combine to confound the measures of the critical values of strain energy release rate, Gc. Adhesive layer thickness variations were observed to be substantial also in specimens prepared with power-planed wood boards and …
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A numerical and experimental study of initial defibration of wood
… by the development of cracks and, in the case of earlywood subjected to compression, by large volumetric changes. It is also shown that the mechanical properties of earlywood are very different from those of latewood and that the specimen orientation versus loading direction has a strong effect on …
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Defining the Regional and Seasonal Climatic Response of Long Douglas-Fir Tree-Ring Chronologies in Central Mexico
… regional and seasonal precipitation signal of earlywood (EW) and latewood (LW) tree-ring chronologies and to create a regionally averaged time series that could be considered as a proxy of seasonal climate for specific regions of central Mexico. Monthly and seasonal analyses between the gridded …
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Is Chir Pine Displacing Banj Oak in the Central Himalaya? Socioeconomic Implications for Local People and the Conservation of Oak Forest Biodiversity
… a positive cool season precipitation response in earlywood and a negative response to warm season precipitation in latewood, which indicate that an increase in summer rainfall associated with anthropogenic climate change could adversely affect the chir pine. Banj oak does not form reliable annual …
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A Dendroclimatic Investigation of Southwestern Saskatchewan
… between tree-ring chronologies (annual, earlywood, and latewood) and streamflow data, and multiple linear regression techniques were used to create robust multi-proxy reconstructions of mean summer (June – August) and average water-year (October – September) streamflow of the Frenchman …
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Modeling thinning effects on ring width distribution and wood specific gravity of loblolly pine (Pinus taeda L.)
… over most of the tree bole and increases the earlywood and latewood components proportionally maintaining an approximately constant latewood proportion. As a consequence, thinning effects on latewood proportion is not significant; confirming the results obtained in the specific gravity study …
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Forest Disturbances: Occurrences and Impacts of Recreational, Hydrogeomorphic, and Climatic Disturbances
… were found to influence the occurrence of earlywood frost rings. Frequent occurrences of frost-rings can be used to identify frost-prone environments and geographical boundaries for plant species. This dissertation bridged gaps in knowledge of recreational, hydrogeomorphic, and climatic …
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Analysis of intra-increment pulping and papermaking properties of loblolly pine wood
… increments were divided into five fractions; two earlywood a transition and two latewood growth zones. Each growth zone was analyzed for lignin, extractives, and carbohydrate content. Each fraction was digested to four different time schedules using kraft pulping process. All other cooking …
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Tree-ring analyses of European oak: implementation and relevance in (pre-)historical research in Flanders.
… for instance, the size and distribution of earlywood vessels, provides an image of the variability in past hydrological conditions. Tree-ring series from wooden sculptures and panel paintings from 15th-16th century display a completely different nature. Since local timber sources mostly …
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Tree-ring analyses of European oak: implementation and relevance in (pre-)historical research in Flanders
… for instance, the size and distribution of earlywood vessels, provides an image of the variability in past hydrological conditions. Tree-ring series from wooden sculptures and panel paintings from 15th-16th century display a completely different nature. Since local timber sources mostly …
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Seasonal Influences on the Carbon-Water Relations in Ponderosa Pine Forests in the Northern Boundary of the North American Monsoon System
… of subsections of the tree rings (e.g., earlywood and latewood) collected from a network of thirteen sites along a latitudinal gradient extending from southern Arizona and New Mexico, through southwest Colorado, and up to northern Utah. The analysis is based on biological and physical …