Results 41 to 50 of about 586,382 (179)

Variação anatômica no lenho de Astronium lecointei Ducke

open access: yesFloresta e Ambiente
Com o objetivo de avaliar a variação dos elementos celulares de Astronium lecointei Ducke no sentido medula-câmbio, analisaram-se amostras de madeira de três regiões radiais da árvore, a 1,30 m do solo: 0% (próximo à medula), 50% (região intermediária) e
Luiz Eduardo de Lima Melo   +4 more
doaj   +1 more source

Competition indices and the prediction of radial growth in Scots pine.

open access: yesSilva Fennica, 1987
The effect of competition on the radial growth of Scots pine ( L.) was studied in three naturally regenerated stands located in North Karelia, Finland. The competition situation of an individual tree was described with various competition indices which ...
Pukkala, Timo, Kolström, Taneli
doaj   +1 more source

No magnetic field variation with pulsation phase in the roAp star gamma Equulei

open access: yes, 2004
We present an analysis of 210 high-resolution time-resolved spectropolarimetric observations of the roAp star gamma Equ obtained over three nights in August and September 2003.
Kochukhov, O.   +2 more
core   +1 more source

Variación radial y longitudinal de la densidad básica en árboles de Eucalyptus regnans de 16 años

open access: yesMaderas: Ciencia y Tecnología, 2014
La variación radial y longitudinal de la densidad básica de la madera, a lo largo del fuste, fueron determinadas en árboles de una plantación de Eucalyptus regnans de 16 años, crecida en la Costa de la Provincia de Arauco, Chile.
Margarette Omonte, Luis Valenzuela
doaj  

Penetration And Scattering Of Lower Hybrid Waves By Density Fluctuations [PDF]

open access: yes, 2014
Lower Hybrid [LH] ray propagation in toroidal plasma is controlled by a combination of the azimuthal spectrum launched from the antenna, the poloidal variation of the magnetic field, and the scattering of the waves by the density fluctuations.
Decker, J.   +5 more
core   +1 more source

P2.03 AORTIC, BUT NOT RADIAL PRESSURE GIVES A MODEL INDEPENDENT ESTIMATE OF CEREBRAL ARTERY CRITICAL CLOSING PRESSURE

open access: yesArtery Research, 2013
Objectives: Cerebral artery critical closing pressure (CCP) is an estimated parameter with no single accepted method of calculation. Variation between methods could be significant.
M.O. Kim   +6 more
doaj   +1 more source

Precise Radial Velocity Measurements for Kepler Giants Hosting Planetary Candidates: Kepler-91 and KOI-1894

open access: yes, 2015
We present results of radial-velocity follow-up observations for the two Kepler evolved stars Kepler-91 (KOI-2133) and KOI-1894, which had been announced as candidates to host transiting giant planets, with the Subaru 8.2m telescope and the High ...
Harakawa, Hiroki   +8 more
core   +1 more source

Effects on radial growth rate on basic density and compressive strength in 10-year-old Swietenia macrophylla planted in South Kalimantan, Indonesia

open access: yesForest Science and Technology
To evaluate the effect of radial growth rate on wood properties (basic density and compressive strength parallel to the grain under green conditions), standing tree characteristics (stem diameter, tree height, and stress-wave velocity of stems) were ...
Anak Agung Ayu Ratih Frismanti   +5 more
doaj   +1 more source

Radial velocity variations in pulsating Ap stars [PDF]

open access: yesAstronomy & Astrophysics, 2005
We have used precise stellar radial velocities to study the pulsational motion of the rapidly oscillating Ap star 10 Aql. Observations were made on three separate nights using the high resolution spectrograph of the Harlan J. Smith 2.7 m telescope at McDonald Observatory.
A. P. Hatzes, D. E. Mkrtichian
openaire   +1 more source

Variation in wood density between mature sessile oak and English oak trees growing in different vegetation zones

open access: yesJournal of Forest Science
Wood density is a fundamental functional trait influencing ecological adaptation, hydraulic safety, and timber utilisation in temperate hardwoods. This study investigated variation in wood density (12% moisture) across mature stands of two economically ...
Vladimír Gryc   +6 more
doaj   +1 more source

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