Results 91 to 100 of about 163,020 (214)

Corrigendum: Delineating origins of cheetah cubs in the illegal wildlife trade: improvements based on the use of hair δ18O measurements

Frontiers in Ecology and Evolution, 2023
Geoff Koehler, Anne Schmidt-Küntzel, Laurie Marker, Keith A. Hobson, Keith A. Hobson   +4 more
doaj   +1 more source

Investigating the effects of animal-specific δ15N-NH3 values volatilized from livestock waste on regional NH3 source partitioning

Atmospheric Environment: X
The natural 15N abundance of ammonia (δ15N-NH3) emitted from livestock waste within a specific area (δ15N-NH3-LW) can be used to estimate its contribution to atmospheric NH3 through an isotope mixing model. However, the limited availability of reports on
Dong Liu, Zhi Quan, Yingying Wang, Kai Huang, Quanping Zhang, Linlin Song, Shaonan Huang, Yanzhi Wang, Zhifeng Xun, Deze Liu, Chang Liu, Yunting Fang, Jianping Sun   +12 more
doaj   +1 more source

On the Geochemical Studies of Stable Isotopes

Journal of the Mass Spectrometry Society of Japan, 1964
The sum of the geochemical cycle of each element should have an average equal to its primary value. Therefore, it should be possible to obtain an isotopic balance for eache lementin the crust. The parameters involved are: the concentration of these elements in the igneous, sedimentary and marine divisions of the crust, the amounts of each environment ...
openaire   +4 more sources

The use of the stable oxygen isotope (18O) to trace the distribution and uptake of water in riparian woodlands [PDF]

, 2002
Streamside vegetation forming narrow "corridors" in temperate regions, is typically dominated by deciduous tree species reflecting strong influences by human activities.
Lambs, L., Berthelot, M., Lourdes, Jean-.Pierre, Lambs, Luc, Berthelot, Marie, Loudes, J.   +5 more
core  

Habitat-based variation in the trophic ecology of the world’s highest-altitude self-sustaining population of invasive rainbow trout

Knowledge and Management of Aquatic Ecosystems
Rainbow trout (Oncorhynchus mykiss) have been widely introduced outside of their natural range and are one of the World’s most invasive species. Illegally introduced into the isolated, high-altitude (4520 m) Chungará catchment of northern Chile, rainbow ...
González Karina, Rivara Pablo, Docmac Felipe, Gomez−Uchida Daniel, Harrod Chris   +4 more
doaj   +1 more source

Stable Isotopes

, 1967
<p>©1967. American Geophysical Union.</p>
openaire   +2 more sources

Utilizing δ15N of biomonitors to assess N emission sources and deposition chemistry?

Ecological Indicators
Anthropogenic nitrogen (N) emissions and subsequent deposition can cause harm to ecosystem function and processes. Identifying emission sources of atmospheric N deposition (Ndep) is critical for land management and policy development to understand what N
Meaghan I. Petix, Michael D. Bell, David G. Williams, R. Dave Evans   +3 more
doaj   +1 more source

Mechanisms of Suprapermafrost Groundwater Recharge Streamflow in Alpine Permafrost Regions: Insights From Young Water Fraction Analysis

Water Resources Research
This study investigates the temporal processes of suprapermafrost groundwater (SPG)‐supplied streamflow in alpine permafrost regions, aiming to fill the gap in understanding this process from a water‐age perspective.
Fa Du, Zongxing Li, Juan Gui, Baijuan Zhang, Jian Xue, Huiling Zhou   +5 more
doaj   +1 more source

Stability of the CAG Tract in the ATXN2 Gene Depends on the Localization of CAA Interruptions

Biomedicines
It is known that the presence of CAA codons in the CAG tract affects the nature and time of disease onset caused by the expansion of trinucleotide repeats.
Oksana Lyasota, Anna Dorohova, Jose Luis Hernandez-Caceres, Alexandr Svidlov, Elena Tekutskaya, Mikhail Drobotenko, Stepan Dzhimak   +6 more
doaj   +1 more source

Infrared Laser-based Method for Measuring Isotope Ratios [PDF]

, 2005
The purpose of this research is to build an inexpensive, compact, and precise spectrometer that will measure the 13C/12C ratio in a sample of carbon dioxide gas.
Fluellen, Jerry
core   +1 more source