A novel copper-catalyzed oxidative desulfurization reaction of thiocarbonyl compounds, using molecular oxygen as an oxidant and leading to formation of carbonyl compounds, has been developed, and the utility of the process is demonstrated by its application to the preparation of a carbonyl-18O labeled sialic acid derivative.

In this paper, we present some results of shell-model calculations employing effective interactions derived from the CD-Bonn free nucleon-nucleon potential. These concern 18O, 134Te, and 210Po, and are part of a comprehensive study of nuclei around doubly closed shells. Comparison of the calculated results with experimental data illustrates the degree of accuracy of modern realistic shell-model...

The identification of nitrate-nitrogen (NO3–N) origin is important in the control of surface and ground water quality. These are the main sources of available drinking water. Stable isotopes (15N and 18O) for NO3–N and along with a 1-D reactive transport model were used to study the origin and processes that lead to nitrogen transformation and loss in a major stream that flows into a reservoir ...

Monsoonal water vapour transport is an active component of the hydrological cycle, which has a profound influence on regional climate changes. This study explored how far can East Asian summer monsoon (EASM) to west during Holocene using published speleothem oxygen isotope (?18O) records inferred from modern analogues precipitation ?18O in season (May September) at mid-latitudes. Modern analyse...

We present detailed models of low and intermediate-mass asymptotic giant branch (AGB) stars with and without the 18F(α,p)21Ne reaction included in the nuclear network, where the rate for this reaction has been recently experimentally evaluated for the first time. The lower and recommended measured rates for this reaction produce negligible changes to the stellar yields, whereas the upper limit ...

Following its addition to arterialized blood in vitro, nitric oxide (NO) is transformed into nitrate in the erythrocytes. Inhaled NO is similarly transformed into nitrate in the blood in vivo. These observations suggest that nitrate is a universal end-metabolite of NO, i.e. of endogenously formed NO as well. However, endogenous NO may also be inactivated in tissues, i.e. outside the vascular lu...