Results 81 to 90 of about 9,408 (243)

CONSTITUTIVE MODEL FOR TIMBER FRACTURE USED FOR FE SIMULATION OF LVL ARCH

open access: yesActa Polytechnica CTU Proceedings, 2018
Non-linear finite element simulation of four-point bending test of a small-size arch is described in this paper. The arch of 780mm span is made of Yellow Poplar (Liriodendron tulipifera) laminated veneer lumber (LVL) and it is manufactured with a through
Eliška Šmídová, Petr Kabele
doaj   +1 more source

Evidence of the late lignification of the G-layer in Simarouba tension wood, to assist understanding how non-G-layer species produce tensile stress [PDF]

open access: yes, 2015
International audienceTo recover verticality after disturbance, angiosperm trees produce " tension wood " allowing them to bend actively. The driving force of the tension has been shown to take place in the G-layer, a specific unlignified layer of the ...
Abedini   +15 more
core   +3 more sources

Spring ephemeral Erythronium umbilicatum may not be vulnerable to phenological mismatch with overstory trees

open access: yesAmerican Journal of Botany, Volume 113, Issue 3, March 2026.
Abstract Premise The defining life history strategy of spring ephemeral wildflowers is their avoidance of shading by trees during the brief, high‐light period before canopy leaf out. Studies suggest that spring ephemerals will experience increased light competition because canopy leaf out is more sensitive to warming than is the phenology of spring ...
Melina Schopler   +6 more
wiley   +1 more source

Assessment of Anthropogenic Volatile Organic Compounds in Leaves of Two Urban Tree Species in Santiago de Chile

open access: yesFrontiers in Forests and Global Change, 2019
Anthropogenic volatile organic compounds (AVOCs) represent the third largest contribution in gaseous emissions in the urban and peri-urban region of Santiago, the capital of Chile.
Mauricio Araya   +6 more
doaj   +1 more source

Xylem surfactants introduce a new element to the cohesion-tension theory [PDF]

open access: yes, 2016
Vascular plants transport water under negative pressure without constantly creating gas bubbles that would disable their hydraulic systems. Attempts to replicate this feat in artificial systems almost invariably result in bubble formation, except under ...
Do, Aissa YT   +10 more
core   +1 more source

Rain, Bark, and Residual Variability in Stemflow From Three Dominant Tree Species of a Southern Great Lakes Forest

open access: yesHydrological Processes, Volume 40, Issue 2, February 2026.
Terrestrial LiDAR and hydrology calibration were used to derive each tree's stemflow drainage area, normalising rainfall‐stemflow relations by contributing surface. The results show that Fagus grandifolia (beech) maintains a stronger, steeper hydrological response to rainfall (exhibited by a higher normalised yield) than Acer saccharum (maple) and ...
Benjamin J. Noren, John T. Van Stan II
wiley   +1 more source

Ecological species groups of South Carolina\u27s Jocassee Gorges, southern Appalachian Mountains

open access: yes, 2004
Ecological species groups, consisting of assemblages of co-occurring plant species exhibiting similar environmental affinities, were developed for ground-flora and tree strata in late- successional forests on a 13,000 ha southern Appalachian landscape ...
Abella, Scott R., shelburne, Victor B.
core   +1 more source

Using Advanced Tri‐Axial Accelerometer Data to Improve Behavioral Time Budgets and Bioenergetic Estimates of Wintering Lesser Scaup

open access: yesEcology and Evolution, Volume 16, Issue 1, January 2026.
We compared two observational methods, traditional ground truthed diurnal scanning observations and 24‐h tri‐axial accelerometer GPS/GSM transmitter data, for calculating behavioral time budgets and estimated the daily energy expenditure of wintering Lesser Scaup.
Hannah L. Schley   +5 more
wiley   +1 more source

Allelopathic Activity of Leaf Wastes of Liriodendron tulipifera for Sustainable Management

open access: yesApplied Sciences
Logging operations of Liriodendron tulipifera L., as timber trees, and fallen leaves in autumn from ornamental trees produce a large amount of leaf waste. In this study, the allelopathy of L.
Hisashi Kato-Noguchi   +3 more
doaj   +1 more source

Scientific and Methodological Basis For the Creation of a New Collection in Dendrological Agrobiostation Chernihiv [PDF]

open access: yes, 2012
У статті проаналізовано науково-методичні засади створення нового арборетуму на території агробіостанції, колекція якого (122 види з 67 родів, 32 родин) має вагоме науково-освітнє значення, насамперед для навчаль- ного процесу Чернігівського ...
Pototska, S. А.   +1 more
core  

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