Results 11 to 20 of about 116,875 (192)

Compound-specific isotope analysis resolves the dietary origin of docosahexaenoic acid in the mouse brain[S] [PDF]

Journal of Lipid Research, 2017
DHA (22:6n-3) may be derived from two dietary sources, preformed dietary DHA or through synthesis from α-linolenic acid (ALA; 18:3n-3). However, conventional methods cannot distinguish between DHA derived from either source without the use of costly ...
R. J. Scott Lacombe, Vanessa Giuliano, Stefanie M. Colombo, Michael T. Arts, Richard P. Bazinet   +4 more
doaj   +2 more sources

Study on Separation of Polycyclic Aromatic Hydrocarbons in Soils for Compound-specific Carbon Isotope Analysis

Yankuang ceshi, 2021
BACKGROUND Tracing the source of polycyclic aromatic hydrocarbons (PAHs) by the compound-specific carbon isotope is becoming increasingly popular. For precise carbon isotope analysis, a pretreatment process is required to reduce co-outflow and unresolved
XIE Man-man, LIU Mei-mei, WANG Shu-xian, LING Yuan, SUN Qing   +4 more
doaj   +1 more source

Central Metabolism and Growth Rate Impacts on Hydrogen and Carbon Isotope Fractionation During Amino Acid Synthesis in E. coli

Frontiers in Microbiology, 2022
Compound specific stable isotope analysis (CSIA) of amino acids from bacterial biomass is a newly emerging powerful tool for exploring central carbon metabolism pathways and fluxes.
Derek A. Smith, Bobby James Nakamoto, Bobby James Nakamoto, Melanie K. Suess, Marilyn L. Fogel   +4 more
doaj   +1 more source

Stable Carbon Isotope Analysis of Hexachlorocyclohexanes by Liquid–Liquid Extraction Gas Chromatography Isotope Ratio Mass Spectrometry: Method Evaluation and Applications

Molecules, 2022
Compound specific isotope analysis (CSIA) and enantiomer specific isotope analysis (ESIA) are powerful tools for assessing the fate of hexachlorocyclohexanes (HCHs) in the environment.
Cuiping Gao, Yunlong Wang, Yu Xia, Haixian Liu, Weiguo Cheng, Yi Xie, Yuesuo Yang   +6 more
doaj   +1 more source

Microbial alteration in marine sediments: Insights from compound-specific isotopic compositions of amino acids in subseafloor environments

Frontiers in Marine Science, 2022
The proportion of amino acids (AAs) in sediment can be used as an indicator of microbial degradation, which is primarily the product of benthic prokaryote activity. The microbial activity would be reflected with the stable isotope ratio of nitrogen (δ15N)
Hyuntae Choi, Bohyung Choi, Bohyung Choi, Yoshito Chikaraishi, Yoshinori Takano, Haryun Kim, Kitack Lee, Dhongil Lim, Kyung-Hoon Shin   +8 more
doaj   +1 more source

Amount‐dependent isotopic fractionation during compound‐specific isotope analysis [PDF]

Rapid Communications in Mass Spectrometry, 2003
Abstract The performance of a gas chromatography‐combustion‐isotope ratio mass spectrometry system (GC‐C‐IRMS) with respect to the dependence of δ 13 C values on the amount of sample is presented.
Schmitt, Jochen, Glaser, B., Zech, W.
openaire   +3 more sources

Compound specific isotope analysis (CSIA) of phthalates and non-targeted isotope analysis (NTIA) of SPE-extractable organic carbon in dilute aquatic environments

Environmental Advances, 2021
Isotope ratio analysis of total organic carbon (TOC) is well-established for the study of rivers, lakes, and oceans. Similarly, these aquatic systems are routinely surveyed to quantify natural and anthropogenic organic compounds and pollutants, including
Marcin Fiedziukiewicz, Quentin Hanley
doaj   +1 more source

Symbiont starvation affects the stability of the coral–Symbiodiniaceae symbiosis

Frontiers in Marine Science, 2022
Coral bleaching, the breakdown of the coral-Symbiodiniaceae association has been identified as a major cause of coral reef decline worldwide. When symbiont functions are compromised, corals receive fewer photosynthetic products from their symbionts and ...
Stephane Martinez, Renaud Grover, Christine Ferrier-Pagès   +2 more
doaj   +1 more source

Highlighting the effects of co‐eluting interferences on compound specific stable isotope analysis of polycyclic aromatic hydrocarbons using comprehensive two‐dimensional gas chromatography [PDF]

, 2014
Accuracy is the most important issue when carrying out compound specific stable isotope analysis of polycyclic aromatic hydrocarbons extracted from complex samples.
Blessing, Buczyńska, Elsner, Gauchotte-Lindsay, Graham, Liu, Mansuy, Mazeas, McGregor, McGregor, McRae, Meier-Augenstein, Pashin, Philp, Philp, Saber, Steinbach   +16 more
core   +1 more source

Trace mercury migration and human exposure in typical mercury-emission areas by compound-specific stable isotope analysis

Environment International, 2023
Anthropogenic mercury (Hg) emissions have increased significantly since the Industrial Revolution, resulting in severe health impacts to humans. The consumptions of fish and rice were primary human methylmercury (MeHg) exposure pathways in Asia. However,
Bo Wang, Shaochen Yang, Ping Li, Chongyang Qin, Chuan Wang, Muhammad Ubaid Ali, Runsheng Yin, Laurence Maurice, David Point, Jeroen E. Sonke, Leiming Zhang, Xinbin Feng   +11 more
doaj   +1 more source