Results 21 to 30 of about 3,667,411 (200)

Application and Prospect of Stable Carbon Isotope to the Study of Carbon Cycle in Grassland Ecosystem

open access: yesShuitu baochi yanjiu, 2021
Utilizing stable carbon isotopes to trace the nutrient circulation and energy flow in ecosystem, trace the dynamics of carbon transfer in ecosystem quantitatively, and clarify the ecosystem carbon cycle and its driving mechanism has become an important ...
ZHANG Hao, LI Jianping
doaj  

Fractionation of the Stable Isotopes of Inorganic Carbon by Seagrasses [PDF]

open access: yesPlant Physiology, 1980
The delta(13)C values for seagrasses collected along the Texas Gulf Coast range from -10.9 to -11.4 per thousand. These values are similar to the delta(13)C values of terrestrial C(4) plants, but seagrasses lack bundle sheath cells which are important in determining the delta(13)C values of C(4) plants.
C R, Benedict, W W, Wong, J H, Wong
openaire   +2 more sources

The Preparation of Carbon and Nitrogen Stable Isotopes Reference Materials Using Sediments from the Bohai and East China Seas

open access: yesYankuang ceshi, 2017
The stable isotope of carbon and nitrogen (δ13C and δ15N) in marine sediments have received much attention as they can be used to trace the sources of organic matter and are helpful in understanding the carbon cycle, climate change and the transformation
QIN De-di   +5 more
doaj   +1 more source

A pilot study of stable isotope fractionation in Bombyx mori rearing

open access: yesScientific Reports, 2023
Hydrogen, oxygen, carbon, and nitrogen isotopes derived from three different strains of silkworms at different life stages involved in silkworm rearing, were measured to understand the fractionation characteristics of stable isotopes at different stages ...
Hao Li   +11 more
doaj   +1 more source

Combined use of stable isotopes and fallout radionuclides as soil erosion indicators in a forested mountain site, South Korea [PDF]

open access: yes, 2013
The aim of this study is to assess and to validate the suitability of the stable nitrogen and carbon isotope signature as soil erosion indicators in a mountain forest site in South Korea.
Mabit, L.   +9 more
core   +2 more sources

Isotopes in pyrogenic carbon: a review [PDF]

open access: yes, 2012
Pyrogenic carbon (PC; also known as biochar, charcoal, black carbon and soot) derived from natural and anthropogenic burning plays a major, but poorly quantified, role in the global carbon cycle.
Michael I. Bird   +5 more
core   +1 more source

Seasonal changes in the δ13C and δ15N signatures of the Lago Maggiore pelagic food web

open access: yesJournal of Limnology, 2011
Seasonal variation in the relative contributions of littoral and pelagic food sources to the diets of open-water zooplankton and subsequent changes in their trophic positions were investigated with carbon and nitrogen Stable Isotope Analysis (SIA).
Marina MANCA, Anna VISCONTI
doaj   +1 more source

Effect of dietary stable isotopic ratios of carbon and nitrogen on the extent of their incorporation into tissues of rats

open access: yesJournal of Animal Science and Biotechnology, 2012
This study was conducted to investigate the effect of different dietary ratios of 13 C to 12 C or 15 N to 14 N on their relative incorporation into tissues.
Lv Wentao   +4 more
doaj   +1 more source

Stable Carbon Isotopes in Zea mays [PDF]

open access: yes, 2018
Summary The increasing demand for food production and predicted climate change scenarios highlight the need for improvements in crop sustainability. The efficient use of water will become increasingly important for rainfed agricultural crops even in fertile regions that have historically received ample precipitation ...
Twohey III, Robert J.   +2 more
openaire   +1 more source

Using 13C-, 15N-, and 18O stable isotope analysis of human bone tissue to identify transhumance, high altitude habitation and reconstruct palaeodiet for the early medieval Alpine population at Volders, Austria [PDF]

open access: yes, 2007
The analysis of stable isotopes of oxygen from structural carbonate in archaeological human bone samples originating from an early medieval cemetery in the Alpine community of Volders, Austria were used to determine the utilization of higher altitudes ...
McGlynn, George
core   +1 more source

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