Results 261 to 270 of about 5,281,681 (332)

Microbiome and cancer immunotherapy: a bibliometric analysis. [PDF]

J Egypt Natl Canc Inst
Tan W.
europepmc   +1 more source

Steppe productivity decline contributed to smallpox outbreak and the collapse of the last nomadic empire in the 1750s. [PDF]

Sci Adv
Tang W, Fang K, Linderholm HW, Boucher É, Mei Z, Li J, Lin S, Zhou F, Camarero J, Seppä H, Chen F.   +10 more
europepmc   +1 more source

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Distribution and speciation of metals in annual rings of black willow.

Journal of Environmental Quality, 2005
ABSTRACTInformation on the spatial distribution and speciation of metals in nonhyperaccumulator plants is lacking. This study used synchrotron X‐ray fluorescence (SXRF) compositional imaging to investigate the spatial distribution of Ni, Mn, Cu, Zn, and Fe in annual rings of black willow (Salix nigra L.) collected from a metal‐contaminated area, and ...
T. Punshon, A. Lanzirotti, S. Harper, P. Bertsch, J. Burger   +4 more
semanticscholar   +3 more sources

Evidence of Climatic Effects in the Annual Rings of Trees

Ecology, 1920
The first substantial comparison between rings and rain with which the author is acquainted was made by the astronomer, J. C. Kapteyn of Holland, in i88o and i88i on oaks in the Rhine region. Professor Kapteyn has recently prepared and published a brief pamphlet on the subject.2 A similar comparison between the growth of the great sequoia (Sequoia ...
A. E. Douglass
semanticscholar   +2 more sources

Enhancement of annual rings on industrial CT images of logs

Object recognition supported by user interaction for service robots, 2002
Many researchers have shown the ability of X-ray computer tomography (CT) of acquiring knowledge about the internal structure of logs. Contrarily to medical CT scanners, industrial CT scanners should satisfy more extreme constraints (in terms of speed, duty cycle, radiation safety, reconstruction circle and aperture size) in order to be used in a ...
Jean-Philippe Andreu, A. Rinnhofer
semanticscholar   +3 more sources

Using Acer platanoides annual rings to monitor the amount of heavy metals accumulated in air

Environmental Monitoring and Assessment, 2018
Mehmet Çetin, Aydın Türkyılmaz, Hakan Sevik   +2 more
exaly   +2 more sources

Effect of climate on the growth of annual rings in the main roots of perennial forbs in an Inner Mongolian semi-arid grassland, China

Journal of Vegetation Science, 2010
Qi-Bin Zhang
exaly   +2 more sources