Jan Długosz University

About: Jan Długosz University is a education organization based out in Częstochowa, Poland. It is known for research contribution in the topics: Crystal structure & Luminescence. The organization has 749 authors who have published 2311 publications receiving 19395 citations. The organization is also known as: Higher Teacher Education School.

Structure and some physicochemical and functional properties of water treated under ammonia with low-temperature low-pressure glow plasma of low frequency

Abstract: Abstract Deionized, tap and two kinds of commercially available mineralized water, after supplementation with ammonia, were treated with low-pressure, low-temperature glow plasma (GP) of low frequency. Treating hard water with ammonia provided the removal of permanent and temporary water hardness already at room temperature. On such treatment, mineralized water supplemented with ammonia was partly demineralized. Precipitated rhombohedral deposit from hard water did not turn into scale even when maintained in suspension for 3 days at around 90°C. In such manner, the use of other chemicals for prevention from the scale formation and/or for the scale removal is entirely dispensable. The rate and yield of precipitation depended on the concentration of admixed ammonia and the GP treatment time. Ammonia served as a ligand of calcium, magnesium and ferric central atoms of corresponding salts constituting the hardness. Moreover, ammonia constituting the atmosphere of the treatment was arrested inside aqueous clathrates. So, stabilized ammonia solutions could potentially be utilized as an environmental-friendly nitrogen fertilizer. The precipitate could also be utilized for the same purpose.

Investigations of Faraday effect in oxide glasses for optoelectronics devices

Abstract: Amorphous glassy materials are of great interest on account of their possible application in optical electronics and glass fiber techniques. In this article lead-bismuth-gallium oxide glasses has been investigated. These materials are characterized by the great value of refractive index and because of absence of paramagnetic ions possess good magneto-optic properties. Measurements of the Faraday effect confirm the occurrence considerable value of the Verdet constant in the group of glasses without rare-earth elements, promising for application in magneto-optic devices.© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Different kinds of boundary condition for time-fractional heat conduction equation

Abstract: Different kinds of boundary conditions (Dirichlet, Neumann, Robin) for time-fractional heat conduction equation are discussed. The fundamental solutions to time-fractional heat conduction equation with the Caputo derivative of the order 0 < α < 2 is considered in a half-plane under two types of Robin boundary condition: the mathematical one with the prescribed linear combination of the values of temperatute and the values of its normal derivative and the physical condition with the prescribed linear combination of the values of temperature and the values of the heat flux at the boundary of the domain.