Insights from Stable Isotopic Tracers on Reproductive Allocation under Stress

Insights from stable isotopic tracers on reproductive allocation under stress.

Fecundity is affected by changes in the nutritional and energetic environment, as a result of changes in acquisition, assimilation, or allocation of macro-nutrients and micro-nutrients. Stable isotopes of carbon and nitrogen offer a window into the processes underlying these changes. In insects that feed on nectar as adults, carbon isotopes can be used to trace allocation of carbon to eggs from...

Intramuscular fatty acid metabolism evaluated with stable isotopic tracers.

We evaluated the applicability of stable isotopic tracers to the study of intramuscular fatty acid metabolism by infusing both [U-13C]palmitate and [1-13C]oleate intravenously for 4 h into fasted conscious rats. Skeletal muscles were sequentially biopsied, and the concentration and 13C enrichment of fatty acids were measured by gas chromatography/combustion/isotope ratio mass spectrometry. Thro...

Radioactivation Analysis and Isotopic Tracers

Stable project allocation under distributional constraints

In a two-sided matching market when agents on both sides have preferences the stability of the solution is typically the most important requirement. However, we may also face some distributional constraints with regard to the minimum number of assignees or the distribution of the assignees according to their types. These two requirements can be challenging to reconcile in practice. In this pape...

4.3 Isotopic Tracers in Bio-medical Applications