Results 241 to 250 of about 2,948,588 (299)
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Automated Image Analysis of Annual Rings in the Roots of Perennial Forbs
International Journal of Plant Sciences, 2005G. Arx, H. Dietz
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Fisheries Research, 2019
Pacific saury, Cololabis saira, are widely distributed in the central Pacific Ocean during the pre-fishing season (June and July) and migrate westward to fishing grounds off the coast of Japan from August to December.
H. Miyamoto +6 more
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Pacific saury, Cololabis saira, are widely distributed in the central Pacific Ocean during the pre-fishing season (June and July) and migrate westward to fishing grounds off the coast of Japan from August to December.
H. Miyamoto +6 more
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A simple model for density of annual rings
Wood Science and Technology, 1995A simple model for density distribution within an annual ring is proposed. The model originates from the concept that a tree has two growing modes ''early'' and ''late'' wood mode respectively and ...
K. Pernest�l, B. Jonsson, B. Larsson
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An Annual Ring Antenna for UWB Communications
IEEE Antennas and Wireless Propagation Letters, 2006An ultrawideband (UWB) annual ring antenna is presented in this letter. The annual ring antenna has a return loss better than 10 dB from 2.8 to 12.3 GHz. It has an average gain of 2.93 dBi and has a maximum gain of 5 dBi at 7 GHz. The antenna radiation patterns are stable within its operation band.
Y.-j. Ren, K. Chang
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Climatic response of annual tree-rings
SPIE Proceedings, 2014Extensive literature devoted to investigations into the influence of environmental conditions on the plant respiration and respiration rate. It is generally accepted that the respired CO2 generated in a stem completely diffuses into the atmosphere. Results obtained from explorations into the CO2 content in disc tree rings by the method proposed in this
Boris G. Ageev +3 more
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Radiocarbon Measurements and Annual Rings in Cave Formations
Nature, 1960THE radiocarbon method has been used to test the hypothesis that the prominent rings found in certain calcite deposits of Moaning Cave in California represent annual growth variations. Carbon-14 an alyses were made on two samples taken, from a presumably active section of travertine covering a human femur (Fig. 1). When discovered in 1951, the specimen
WALLACE S. BROECKER +2 more
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Annual Bird Ringing Totals and Population Fluctuations
Oikos, 1978Ringing of migrant birds has taken place at Ottenby, Oland, southeast Sweden since 1947. The effect of the winter weather in northwestern Europe on the wren Troglodytes troglodytes, of precipitation in the Sahel zone on the common whitethroat Sylvia communis and of the use of alkyl mercury compounds in Swedish agriculture on the yellowhammer Emberiza ...
Christian Hjort +2 more
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Annual Growth Rings in a Sample of Hymenaea Courbaril
IAWA Journal, 2006Several tropical tree species form regular growth rings that may be annual and thus be useful in paleoclimate reconstructions. Regular growth rings were observed in one stem disk of the tropical legume Hymenaea courbaril harvested near the city of David, Panama. By comparison to annual reference Δ14C values from temperate tree wood and air, Δ14C values
Jessica A. Westbrook +2 more
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