Results 41 to 50 of about 2,700,976 (288)
Maderas: Ciencia y TecnologíaAfter forest suppression in mining areas, deterioration of stocked tropical hardwoods occurs at different rates and levels. Prioritizing logs to avoid wastage is challenging because the wide interspecific variability of wood traits makes natural ...
Ana Kelly de Sousa Silva +11 more
doaj +1 more source
Evolution of density perturbations in a realistic universe
, 2005 Prompted by the recent more precise determination of the basic cosmological parameters and growing evidence that the matter-energy content of the universe is now dominated by dark energy and dark matter we present the general solution of the equation ...
A. Friedman +27 more
core +1 more source
Basics of the density functional theory
AIMS Materials Science, 2017 The density functional theory (DFT) established itself as a well reputed way to compute the electronic structure in most branches of chemistry and materials science. In the formulation given by Kohn, Hohenberg and Sham in the 1960's, the many-electron wave function is replaced by the electron density, so that the energy is just a functional of the ...
openaire +2 more sources
The role and implications of mammalian cellular circadian entrainment
FEBS Letters, EarlyView.At their most fundamental level, mammalian circadian rhythms occur inside every individual cell. To tell the correct time, cells must align (or ‘entrain’) their circadian rhythm to the external environment. In this review, we highlight how cells entrain to the major circadian cues of light, feeding and temperature, and the implications this has for our
Priya Crosby
wiley +1 more source
Compression wood in Pinus radiata II: Density and chemical composition
Maderas: Ciencia y Tecnología, 2014 Ten 22 year old radiata pine trees growing in two stands in Chile, one in clay and the other in humid sand soils showing some lean, were assessed for chemical composition and wood density of compres-sion wood. Signifi cant differences in type of wood in
J. E. Diaz-vaz +5 more
doaj
Granular two-phase insulation systems [PDF]
, 1971 Easily prepared system, consisting of matrix of hollow zirconia microspheres containing dispersed tungsten powder, produces minimum-cost, prototype test specimen.
Carpenter, H. W.
core +1 more source
Molecular bases of circadian magnesium rhythms across eukaryotes
FEBS Letters, EarlyView.Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley +1 more source
Maderas: Ciencia y Tecnología, 2012 El raleo tiene implicancias económicas y técnicas tanto para producción forestal como para la actividad industrial. En el presente estudio se realizó la evaluación de un ensayo de intensidad de raleo en E.
Sandro Díaz Bravo +4 more
doaj
A study of teak wood quality from community forests in Gunungkidul III. Physical properties
Jurnal Ilmu Kehutanan, 2014 The objective of this work is to explore the variation of physical properties of wood from teak trees grown in 3 different sites (Panggang, Playen, Nglipar) from community forests of Gunungkidul Regency.
Sri Nugroho Marsoem +4 more
doaj +1 more source
Universal basic mass density inside dark matter halos
Physica ScriptaAbstract In this work we propose a universal basic mass density and a universal basic metric inside dark matter halos in the framework of Einstein equations providing an analytical ground for learning about dark matter. In a previous work the authors have proposed a simplified model for galaxies: a Schwarzschild black hole (that contains
Nidal Haddad, Fateen Haddad
openaire +2 more sources