Op-brai120193 1..18

Phosphate oxygen isotopes within aquatic ecosystems: global data synthesis and future research priorities.

The oxygen isotope ratio of dissolved inorganic phosphate (δ(18)Op) represents a novel and potentially powerful stable isotope tracer for biogeochemical research. Analysis of δ(18)Op may offer new insights into the relative importance of different sources of phosphorus within natural ecosystems. Due to the isotope fractionations that occur alongside the metabolism of phosphorus, δ(18)Op could a...

Op-jleo130010 1..18

Solutions to the Oberwolfach problem for orders 18 to 40

The Oberwolfach problem (OP) asks whether Kn (for n odd) or Kn minus a 1-factor (for n even) admits a 2-factorization where each 2-factor is isomorphic to a given 2-factor F . The order n and the type of the 2-factor F are the parameters of the problem. For n ≤ 17, the existence of a solution has been resolved for all possible parameters. There are also many special types of 2-factors for which...

Significant improvement of bone mineral density by denosumab treatment in Japanese osteoporotic patients following breast cancer treatment

Background The aim of this study was to evaluate the effects of denosumab in patients with osteoporosis (OP) and non-metastatic breast cancer following treatment of 1) surgery, 2) surgery and aromatase inhibitors, and 3) surgery, aromatase inhibitors, and anti-cancer agents, compared with those in primary OP patients. Patients and methods In this retrospective 24-month study, patients were di...

Dentine oxygen isotopes (δ 18O) as a proxy for odontocete distributions and movements

Spatial variation in marine oxygen isotope ratios (δ (18)O) resulting from differential evaporation rates and precipitation inputs is potentially useful for characterizing marine mammal distributions and tracking movements across δ (18)O gradients. Dentine hydroxyapatite contains carbonate and phosphate that precipitate in oxygen isotopic equilibrium with body water, which in odontocetes closel...