Objectives: In the present investigation, transparent novel glass embedded with ferroic matrix was prepared by melt-quenching method. Among all glasses, selective ceramic is also prepared. Optical and electrical measurements were carried out on samples. Methods: We have composition of (100-x)[0.55Bi2O3-0.30B2O3-0.15TiO2] +xBaTiO3 ; x=0, 10, 20, 30, 40, 50 wt.%. Appropriate amounts reactant mixt...

A gravel pit in south central Stearns County, Minnesota exposes sand and gravel of the Merden Lake esker which is thought to have been deposited by a subglacial stream associated with the Wisconsinan-aged Superior Lobe of the Laurentide ice sheet. An analysis of these sediments was conducted from samples collected through a vertical trench on an east-facing exposure of the gravel pit. A total o...

A survey of the Pearl Island archipelago discovered a Preceramic shell-bearing midden on island Pedro González located in Panama Bay eastern tropical Pacific Ocean. This occupation dates between ca. 6200 and 5600 cal yr BP, revealed mixed marine terrestrial economy including exploitation sea turtles, snakes, iguanas, dolphins, land mammals such as dwarf deer. Test excavations 2007–2010 provided...

In this article different mathematical models of the Liesegang phenomenon are exhibited. The main principles of modeling are discussed such as supersaturation theory, sol coagulation and phase separation, which describe the phenomenon using different steps and mechanism beyond the simple reaction scheme. We discuss whether the underlying numerical simulations are able to reproduce several empir...

We measured O-isotopic compositions of equilibrated ordinary chondrites (EOCs) using the CO 2 laser-BrF 5 fluorination technique at Korea Polar Research Institute. Fifty one EOC falls from UCLA collections were selected for this study. About 30-50 mg from each chondrite was gently crushed using agate mortar and pestle. About 2 mm-size fragment each was used to make polished thick sections. We o...