Abstract We present a statistical study of the largest bibliographic compilation stellar and orbital parameters W UMa stars derived by light-curve synthesis with Roche models. The includes nearly 700 individually investigated objects from over 450 distinct publications. Almost 70% this sample is comprised observed in past decade that have not been considered previous studies. estimate ages cata...

(Abridged) We present an analysis of the 700 ks Chandra ACIS-S observation field around Spiderweb Galaxy at z=2.156, focusing on nuclear activity in associated large-scale environment. identify unresolved X-ray sources down to flux limits 1.3X10^{-16} and 3.9X10^{-16} erg/s/cm^2 soft hard band, respectively. search for counterparts optical, NIR submm bands belonging protocluster. detect 107 wit...

Intrusion of the Kalaybar nepheline syenite into the Cretaceous pelitic and calcareous sediments has produced a thermal aureole up to 1km thick. Six mineralogical zones are developed in the pelitic rocks with minerals such as cordierite, K feldspar, sillimanite and corundum. Chemically suitable rocks are partially melted in response to the heat from the pluton. Five mineralogical zones are deve...

Following dark adaptation, the response to irradiance of chlorophyll (Chl) fluorescence, the light-induced absorbance change around 820 nm (to measure reaction center Chl of photosystem I [PSI] P-700 oxidation), and CO2 fixation were examined in pea (Pisum sativum L.) leaves under a range of conditions. Initially, P-700 oxidation is restricted by a lack of regeneration of PSI electron acceptors...

The present invention provides new compounds for use in proton exchangemembranes which are able to operate in a wide variety of temperature ranges, including in the intermediate temperature range of about 100° C. to 700°C., andnew and improved methods of making these compounds. The present invention also provides new and improved methods for making chalcogenide compounds, including, but not lim...