Przykłady isotope

• This is no doubt related to the increased interest in gas centrifuges as a means of separating uranium isotopes.

• It is commonly believed that both processes are very efficient and do not cause much fractionation of the isotopes.

• Scope for use of stable carbon isotopes in discerning the incorporation of forest detritus into aquatic foodwebs.

• In two other patients, the uptake of isotope by the right ventricle did not fall with time as much as expected following the arterial switch.

• Both also had higher scores for left ventricular uptake of isotope than the two patients who were considered unsuitable for conversion to the arterial switch.

• When using carbon, however, the carbon 11 isotopes produced by fragmentation are positron emitters.

• We have recently developed an isotope pulse-chase experiment using quantitative mass spectrometry that permits assembly kinetics to be measured in real time.

• These differences are also consistent model predictions of sulfur isotope fractionations produced by biosynthetic networks.

• The processes as monitored by stable isotopes seem too slow to generate distinct glacial periods.

• All aspects are covered: mineralogy, major- and trace-element compositions, and isotope (radiogenic and stable) geochemistry.

• Disentangling a rainforest food web using stable isotopes: dietary diversity in a speciesrich ant community.

• Structure of river food webs revealed by stable isotope ratios.

• We see that fully closed pore graphites prevents this contribution to hydrogen isotope inventory because there is no continuous surface leading deep into the graphite.