Results 1 to 10 of about 65,167,055 (305)

Production and stability of Oxygen-18 labeled Caribbean ciguatoxins and gambierones [PDF]

Toxicon, 2022
Ciguatoxins (CTXs) and gambierones are ladder-shaped polyethers associated with ciguatera poisoning and Gambierdiscus spp. Several of these compounds contain carbonyl or hemiketal groups, which have the potential to exchange with 18O-labeled water under acidic conditions.
Mudge, Elizabeth M., Meija, Juris, Uhlig, Silvio, Robertson, Alison, McCarron, Pearse, Miles, Christopher O.   +5 more
openaire   +4 more sources

Stable isotope mass balance of fifty lakes in central Alberta: Assessing the role of water balance parameters in determining trophic status and lake level

Journal of Hydrology: Regional Studies, 2016
Study region: This study spans the Prairie/parkland/boreal transition in central Alberta, including lakes in the Athabasca, North Saskatchewan, Battle River and Red Deer Basins.
J.J. Gibson, S.J. Birks, Y. Yi, M.C. Moncur, P.M. McEachern   +4 more
doaj   +1 more source

Spatial distribution of oxygen-18 and deuterium in stream waters across the Japanese archipelago [PDF]

Hydrology and Earth System Sciences, 2015
The spatial distribution of oxygen and hydrogen isotopic composition (δ18O and δ2H) of stream waters across Japan was clarified with a data set by compiling sample data obtained from 1278 forest catchments during the summer of 2003.
M. Katsuyama, T. Yoshioka, E. Konohira
doaj   +1 more source

Hydrochemical and isotope groundwater investigations in Sorško polje

Geologija, 2008
From the hydrogeological point of view Sorško polje area is a sink, filled with conglomerate,sandand gravel,where large quantities of groundwater are accumulated.
Brigita Jamnik, Janko Urbanc
doaj  

Planetary fertility during the past 400 ka based on the triple isotope composition of O₂ in trapped gases from the Vostok ice core [PDF]

Climate of the Past, 2012
The productivity of the biosphere leaves its imprint on the isotopic composition of atmospheric oxygen. Ultimately, atmospheric oxygen, through photosynthesis, originates from seawater.
J. C. von Fischer, B. Barnett, T. Blunier, M. L. Bender   +3 more
doaj   +1 more source

Isotopes of oxygen-18 and deuterium in precipitation in Slovakia / Izotopy kyslíka-18 A deutéria v zrážkach na Slovensku

Journal of Hydrology and Hydromechanics, 2012
Príspevok syntetizuje dostupné údaje o izotopickom zložení zrážok na území Slovenska (Západné Karpaty). Hodnotí koreláciu hodnôt δ18O v kumulatívnych mesačných zrážkach z rokov 1988-1997 medzi jednotlivými stanicami, vplyv nadmorskej výšky, teploty ...
Holko Ladislav, Dóša Michal, Michalko Juraj, Šanda Martin   +3 more
doaj   +1 more source

Serum interleukin-18 levels are associated with physical activity in Japanese men.

PLoS ONE, 2013
ObjectiveTo investigate the link between serum interleukin-18 (IL-18) levels and physical activity in Japanese men.MethodsA total of 81 men (45.7±17.6 years old) was enrolled in this cross-sectional investigation study.
Kanae Oda, Nobuyuki Miyatake, Noriko Sakano, Takeshi Saito, Motohiko Miyachi, Izumi Tabata, Takeyuki Numata   +6 more
doaj   +1 more source

Dynamics Of Seasonal Patterns In Geochemical, Isotopic, And Meteorological Records Of The Elbrus Region Derived From Functional Data Clustering

Geography, Environment, Sustainability, 2020
A nonparametric clustering method, the Bagging Voronoi K-Medoid Alignment algorithm, which simultaneously clusters and aligns spatially/temporally dependent  curves,  is applied to study various data series from the Elbrus  region (Central Caucasus).
Gleb A. Chernyakov, Valeria Vitelli, Mikhail Y. Alexandrin, Alexei M. Grachev, Vladimir N. Mikhalenko, Anna V. Kozachek, Olga N. Solomina, V. V. Matskovsky   +7 more
doaj   +1 more source

A seasonal precipitation isoscape for New Zealand

Journal of Hydrology: Regional Studies
Region: New Zealand Focus: Application of a seasonal precipitation isoscape for New Zealand, to incorporate influences of regional scale atmospheric circulation, and local topography.
B.D. Dudley, A.F. Hill, A. McKenzie
doaj   +1 more source

Interpretation of groundwater origin in the Velenje coal mine on the basis of isotope composition

Geologija, 2002
The aim of the investigation was to determine the isotopic properties of cave waters from the Velenje coal mine and define the recharge areas of individual aquifers.
Janko Urbanc, Bojan Lajlar
doaj