Results 21 to 30 of about 9,799,487 (341)
Intermediate age stars as origin of the low velocity dispersion nuclear ring in Mrk1066 [PDF]
, 2010 We report the first two-dimensional stellar population synthesis in the near-infrared of the nuclear region of an active galaxy, namely Mrk1066. We have used integral field spectroscopy with adaptive optics at the Gemini North Telescope to map the to ...
Bian +24 more
core +3 more sources
La formación de anillos de crecimiento en Fissurella crassa en el norte de Chile
Brazilian Journal of Oceanography, 1980 Growth discontinuity in molluscs result in the formation of rings on their shells. Two kind of rings may be formed: disturbance and growth rings. Growth rings can be used to determine the age of molluscs with long life span.
Marta Bretos
doaj +1 more source
Hystrix, the Italian Journal of Mammalogy, 2000 <strong>Abstract</strong> The hunting management of roe deer in Emilia-Romagna provides the correct classification of the age classes of dead specimens, usually determined shortly after killing by hunters.
Luciano Cicognani, Franca Monti
doaj +1 more source
The Stellar Content of the Polar Rings in the Galaxies NGC 2685 and NGC 4650A [PDF]
, 2003 We present the results of stellar photometry of polar-ring galaxies NGC 2685 and NGC 4650A, using the archival data obtained with the Hubble Space Telescope's Wide Field Planetary Camera 2.
Bertelli G. +12 more
core +1 more source
A ringed pole-on outflow from DO Tauri revealed by ALMA [PDF]
, 2020 We present new ALMA Band 6 observations including the CO (2-1) line and 1.3 mmcontinuum emission from the surroundings of the young stellar object DO Tauri.
Fernandez Lopez, Manuel +5 more
core +2 more sources
No Age Trends in Oak Stable Isotopes
Paleoceanography and Paleoclimatology, 2020 Although the importance of stable isotope ratios in tree rings is increasing for high‐resolution climate reconstructions, it is still unclear if such values exhibit age trends that require some form of standardization.
U. Büntgen +12 more
semanticscholar +1 more source
Identifying heartwood-rich stands or stems of Pinus sylvestris by using inventory data
Silva Fennica, 1999 Variations in heartwood percentage, heartwood radius and sapwood width, within and between stands of Scots pine (Pinus sylvestris L.), were analysed using a database of 198 CT-scanned (computer tomography) stems from 33 research plots (stands ...
Björklund, Lars
doaj +1 more source
A SINFONI view of circum-nuclear star-forming rings in spiral galaxies [PDF]
, 2007 We present near-infrared (H- and K-band) SINFONI integral-field observations of the circumnuclear star formation rings in five nearby spiral galaxies. We made use of the relative intensities of different emission lines (i.e. [FeII], HeI, Brg) to age date
Combes +6 more
core +1 more source
Frontiers in Marine Science, 2020 Age and growth studies provide critical data for clam fishery management. Three aging techniques, thin sections and acetate peel replicas – which involve shell sectioning – and surface growth rings were used to estimate the age and growth of Chamelea ...
Giada Bargione +7 more
doaj +1 more source
The use of X-ray method to study annual growth variation of Pinus eldarica [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2013 Using non-destructive methods to study forest productivity and wood quality as well as annual growth variations deserve special importance. In this regard annual growth changes of Pinus eldarica include width of the spring and summer rings and percentage
Saeid Mehrabi
doaj +1 more source