Results 31 to 40 of about 129,759 (303)

Isotope Shift Measurements of Stable and Short-Lived Lithium Isotopes for Nuclear Charge Radii Determination [PDF]

, 2010
Changes in the mean-square nuclear charge radii along the lithium isotopic chain were determined using a combination of precise isotope shift measurements and theoretical atomic structure calculations.
A. Dax, A. Wojtaszek, B. A. Bushaw, B. A. Bushaw, C. D. P. Levy, C. Zimmermann, G. A. Noble, G. Ewald, G. W. F. Drake, G. W. F. Drake, G. W. F. Drake, H.-J. Kluge, J. Behr, J. Dilling, J. Lassen, J. Walls, K. Pachucki, L. I. Schiff, M. Dombsky, M. Pearson, M. Puchalski, P. Bricault, R. Sánchez, S. Götte, Th. Kühl, W. E. Otten, W. H. Press, W. Nörtershäuser, Z.-C. Yan   +28 more
core   +3 more sources

Stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation [PDF]

, 2012
Winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. Such information is unavailable for most species.
BJM Stutchbury, BN Smith, C Eraud, C Fry, CM Perrins, CP Chamberlain, D Lack, D Norman, DI Pearson, DJ Pain, DS Wilcove, E Yohannes, FJ Sanderson, G Gory, GD Farquhar, GJ Morel, I Burfield, I Newton, JA Grey, Jason Newton, JC Sealy, JC Vogel, JF Kelly, JM Neto, John W. Mallord, JR Ehleringer, K Risely, KA Hobson, Karl L. Evans, KL Evans, L Jenni, L Svensson, L Zwarts, LA Hill, M Cardillo, M Schaub, MB Hernquist, MJA Werger, MS Webster, N Cooper, N Saino, Ofer Ovadia, P Chantler, P Marra, RA Robinson, RF Inger, RP Ellis, S Bearhop, S Bensch, S Oppel, S Shultz, SD Newsome, SH Ambrose, Shai Markman, T Szép, T Szép, TB Coplen, TB Oatley, TS Reichlin, WJ Peach   +59 more
core   +4 more sources

Research on the Identification of Matheran Wine Region in the East Foot of Helan Mountain

Shipin gongye ke-ji
Objective: To explore the feasibility of using stable carbon and oxygen isotopes and mineral elements in small-scale regional wine production identification, the fractionation characteristics of stable isotopes of carbon and oxygen in wine of Matheran ...
Jianrong KAI, Haiyan MA, Wei ZHANG, Xiang CHEN, Caiyan WANG, Jing ZHANG, Caihong LI, Qian GE   +7 more
doaj   +1 more source

Applications of stable carbon isotopes in soil science with special attention to natural 13C abundance approach

Hungarian Geographical Bulletin, 2019
Since the invention of the isotope ratio mass spectrometer, isotope analysis has shed light on many key processes in the Earth’s ecosystems. Stable isotope analysis was first applied in the field of chemistry and geochemistry, while the use of isotopic ...
Dóra Zacháry
doaj   +1 more source

Stable isotopes in stratospheric carbon monoxide [PDF]

, 2021
The isotopes of an element provide a wealth of information for the chemistry and transport of trace gases in the atmosphere. In this work, the isotope composition of carbon and oxygen in carbon monoxide is used to gain new insights on transport and chemistry related to methane oxidation in the stratosphere.
openaire   +1 more source

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]

, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

Stable Carbon Isotope Fractionation by Methylotrophic Methanogenic Archaea [PDF]

Applied and Environmental Microbiology, 2012
ABSTRACT In natural environments methane is usually produced by aceticlastic and hydrogenotrophic methanogenic archaea. However, some methanogens can use C 1 compounds such as methanol as the substrate. To determine the contributions of individual substrates to methane production, the stable-isotope values
Penger, J., Conrad, R., Blaser, M.
openaire   +3 more sources

Stable Carbon Isotope Fractionation by Sulfate-Reducing Bacteria [PDF]

Applied and Environmental Microbiology, 2003
ABSTRACT Biogeochemical transformations occurring in the anoxic zones of stratified sedimentary microbial communities can profoundly influence the isotopic and organic signatures preserved in the fossil record. Accordingly, we have determined carbon isotope discrimination that is associated with both heterotrophic and ...
Kathleen L, Londry, David J, Des Marais
openaire   +2 more sources

Analytical modelling of stable isotope fractionation of volatile organic compounds in the unsaturated zone [PDF]

, 2011
Analytical models were developed that simulate stable isotope ratios of volatile organic compounds (VOCs) near a point source contamination in the unsaturated zone. The models describe diffusive transport of VOCs, biodegradation and source ageing.
Abriola, Baehr, Bouchard, Bouchard, Bouchard, Bouchard, Broholm, Cerling, Christophersen, Clark, Conant, Craig, Daniel Bouchard, Daniel Hunkeler, Davis, Davis, Elsner, Fabien Cornaton, Falta, Franzmann, Gaganis, Grathwohl, Harrington, Hers, Hoff, Hohener, Hohener, Hunkeler, Hunkeler, Jin, Jost, Jury, Karapanagioti, Kiss, Kuder, Lahvis, Meckenstock, Millington, Moldrup, Ostendorf, Parker, Pasteris, Patrick Höhener, Schmidt, Schwarzenbach, Schüth, Sherwood Lollar, Slater, Smith, Van de Steene, Wang, Werner, Werner   +52 more
core   +3 more sources

The niche of shrimp stocks (Xiphopenaeus kroyeri Heller, 1862) from southeastern Brazil: a stable isotope approach

Journal of Threatened Taxa, 2020
The penaeid shrimp Xiphopenaeus kroyeri is the second most important species of crustacean in Brazilian fisheries. Stable isotopes of carbon and nitrogen are chemical proxies to provide quantitative information about the consumer isotopic niche, which is
Keltony de Aquino Ferreira, Leandro Rabello Monteiro, Ana Paula Madeira Di Beneditto   +2 more
doaj   +1 more source