Stable isotope modelling of subduction zone volcanism : The case of Kamchatka

1998 ◽  
Vol 43 (S1) ◽  
pp. 58-58
Author(s):  
M. Javoy ◽  
F. Pineau
Keyword(s):  
Stable Isotope ◽  
Subduction Zone ◽  
Isotope Modelling

Using carbon and nitrogen stable isotope modelling to assess dietary mercury exposure for pregnant women in Baja California Sur, Mexico

Chemosphere ◽  
2019 ◽  
Vol 234 ◽  
pp. 702-714 ◽  
Author(s):  
John Harley ◽  
Ramón Gaxiola-Robles ◽  
Tania Zenteno-Savín ◽  
Lía Celina Méndez-Rodríguez ◽  
Alfonso Enrique Bencomo-Alvarez ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Pregnant Women ◽  
Baja California ◽  
Mercury Exposure ◽  
Baja California Sur ◽  
Nitrogen Stable Isotope ◽  
Carbon And Nitrogen ◽  
Isotope Modelling

Vitamin A Value of Plant Food Provitamin A - Evaluated by the Stable Isotope Technologies

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 25-29 ◽  
Author(s):  
Guangwen Tang
Keyword(s):  
Stable Isotope ◽  
Vitamin A ◽  
Provitamin A ◽  
Animal Origin ◽  
Plant Food ◽  
Plant Foods ◽  
A Value ◽  
Provitamin A Carotenoids ◽  
Β Carotene

Humans need vitamin A and obtain essential vitamin A by conversion of plant foods rich in provitamin A and/or absorption of preformed vitamin A from foods of animal origin. The determination of the vitamin A value of plant foods rich in provitamin A is important but has challenges. The aim of this paper is to review the progress over last 80 years following the discovery on the conversion of β-carotene to vitamin A and the various techniques including stable isotope technologies that have been developed to determine vitamin A values of plant provitamin A (mainly β-carotene). These include applications from using radioactive β-carotene and vitamin A, depletion-repletion with vitamin A and β-carotene, and measuring postprandial chylomicron fractions after feeding a β-carotene rich diet, to using stable isotopes as tracers to follow the absorption and conversion of plant food provitamin A carotenoids (mainly β-carotene) in humans. These approaches have greatly promoted our understanding of the absorption and conversion of β-carotene to vitamin A. Stable isotope labeled plant foods are useful for determining the overall bioavailability of provitamin A carotenoids from specific foods. Locally obtained plant foods can provide vitamin A and prevent deficiency of vitamin A, a remaining worldwide concern.

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