Results 21 to 30 of about 105,676 (166)

Sex-specific energy expenditure during the Alaska mountain wilderness ski classic; insights from an Arctic winter expedition

Frontiers in Physiology
PurposeThe Alaska Mountain Wilderness Ski Classic (AMWSC) is a self-supported and self-oriented winter expedition that occurs in the remote North American Brooks Range, ∼200 km north of the Arctic Circle.
Melynda S. Coker, Michelle N. Ravelli, Timothy C. Shriver, Dale A. Schoeller, Dustin R. Slivka, Brent C. Ruby, Robert H. Coker   +6 more
doaj   +1 more source

Reference Material Preparation of 143Nd/144Nd Isotope Ratio

Yankuang ceshi, 2017
143Nd/144Nd isotope ratio is the key for Sm-Nd isotope method. The 143Nd/144Nd isotope ratio of geological samples varies within a small range, and thus the 143Nd/144Nd isotope ratio analysis must be precise.
TANG Suo-han, LI Jin, LIANG Xi-rong, ZHANG Li-guo, LI Guo-zhan, PU Wei, LI Chao-feng, YANG Yue-heng, CHU Zhu-yin, ZHANG Jun, HOU Ke-jun, WANG Xiao-ming   +11 more
doaj   +1 more source

Differences in Ratio of Carbon Stable Isotopes among Barley Grain Milling Fractions with Various Concentrations of Beta-Glucans

Molecules, 2023
The grains of three barley varieties were milled and sieved to obtain respective milling fractions with a content of beta-glucans (b-G) from 1.4 to 10.7%. The enriched fraction obtained by the extraction and precipitation contained 24.7% of b-G.
Tom Levanič, Blaž Cigić, Mateja Germ, Ivana Polišenská, Kateřina Vaculová, Igor Pravst, Darja Kocjan Ačko, Ivan Kreft   +7 more
doaj   +1 more source

Study on the Analysis of Uranium-in Rat Hair by Secondary Ion Mass Spectrometry

Journal of Isotopes, 2021
Hair samples, as a non-invasive biological material, it is gradually gaining attention in the fields of nuclear forensics, environmental monitoring, occupational exposure detection, and medicine due to its certain accumulation effect on human trace ...
HU Ruixuan;SHEN Yan;LI Lili;HUANG Shenghui;ZHAO Lifei;ZHAO Yonggang
doaj  

Stable Isotope Analysis of Residual Pesticides via High Performance Liquid Chromatography and Elemental Analyzer–Isotope Ratio Mass Spectrometry

Molecules, 2022
To broaden the range of measurable pesticides for stable isotope analysis (SIA), we tested whether SIA of the anthranilic diamides cyantraniliprole (CYN) and chlorantraniliprole (CHL) can be achieved under elemental analyzer/isotope ratio mass ...
Hee Young Yun, Eun-Ji Won, Jisoo Choi, Yusang Cho, Da-Jung Lim, In-Seon Kim, Kyung-Hoon Shin   +6 more
doaj   +1 more source

Elemental (CNS) and isotopic (δ13C and δ15N) characterization of local sources to atmospheric dust at Trombay, Mumbai, using elemental analyzer–isotope ratio mass spectrometry

Radiation Protection and Environment
Particulate matter (PM) in the air has significant implications for human health and the environment, particularly in urban areas with high concentrations. This study focuses on the isotopic (δ13C and δ15N), elemental (CNS) as well as the total carbon to
V. B. Yadav, Vandana Pulhani, A Vinod Kumar   +2 more
doaj   +1 more source

^<18>O/^<16>O Activity Ratio at 0℃ of Salt Water of Don Juan Pond and Lake Bonney, Dry Valleys, Antarctica

Antarctic Record, 1977
The oxygen isotope ratio determined from CO_2 equilibrated isotopically with the water sample provides the oxygen isotope activity ratio of the water sample.
Kikuo KATO
doaj   +1 more source

The development of the GC-MS analytical method used for the determination of the isotope ratio of linalool in yuzu essential oil from different geographic origins

Vietnam Journal of Science, Technology and Engineering, 2017
A refined analytical method has been developed for the determination of the isotope ratio of oxygenated compounds in essential oils, using high-resolution gas chromatographymass spectrometry (HRGC-MS), has been developed.
Thi Thao Nguyen, Masayoshi Sawamura
doaj   +1 more source

Application of ¹³C Quantitative NMR Spectroscopy to Isotopic Analyses for Vanillin Authentication Source

Foods, 2021
The carbon stable isotope ratio (δ13C) is a valuable chemical parameter in the investigation of the geographic origin, quality, and authenticity of foods.
Concetta Pironti, Maria Ricciardi, Oriana Motta, Federica Camin, Luana Bontempo, Antonio Proto   +5 more
doaj   +1 more source

Dietary misreporting: a comparative study of recalls vs energy expenditure and energy intake by doubly-labeled water in older adults with overweight or obesity

BMC Medical Research Methodology
Background Self-report methods are widely used to assess energy intake but are prone to measurement errors. We aimed to identify under-reported, over-reported, and plausible self-reported energy intake by dietary recalls (rEI) using a standard method ...
Leinys S. Santos-Báez, Michele N. Ravelli, Diana A. Díaz-Rizzolo, Collin J. Popp, Dympna Gallagher, Bin Cheng, Dale Schoeller, Blandine Laferrère   +7 more
doaj   +1 more source