Abstract Colours play an important role in many applications such as education, communication, tourism, marketing, and architecture. From the previous research, especially related to colour could affect people’s focus or attention level. However, with further investigation, also be used for controlling activating electronic devices. Therefore, purpose of this study is find out if turquoise, gre...

The solid solutions of chlorapatite compounds Ba5Mn3 xVxO12Cl (x 1⁄4 0e3.0) and Ba5Mn3 xPxO12Cl (x 1⁄4 0 e3.0) have been synthesized through solid state reactions and Pechini or solegel method using citric acid. The colors of the samples change from white (x 1⁄4 3.0) through turquoise (x 1⁄4 1.5) to dark green (x 1⁄4 0) with increasing amount of manganese. Optical measurements reveal that the o...

This is the fourth paper presenting new mosaic-like mineralogical data from Carpathian–Pannonian region. Data are arranged by countries and localities. Every section gives a description (including XRPD, EMPA SEM-EDX results) of minerals concise their parageneses. discussed mineral first described given locality in many times even whole region.From Hungary following reported: freieslebenite beav...

Chemical analysis of a visually opaque, turquoise-blue ingot from the Late Bronze Age royal capital at Amarna, housed in Garstang Museum, University Liverpool, shows an excess copper colourant which indicates that intended colour was opaque red. Trace element places location manufacture Egypt, and date, finds location, dimensions suggest glass made Amarna. This, coupled with other recent ingots...

ZnO and Mn-ZnO nano powders were prepared by the sol-gel auto combustion method. The products were characterized by X-ray diffraction (XRD), energy dispersive analysis of X-ray (EDX) and scanning electron microscopy (SEM). Structural and morphological properties of nano particles were investigated and the average crystalline size of ZnO and Mn-doped ZnO was obtained 44 and 51 nm, respectively. ...

Biogas is a renewable feedstock that can be used to produce hydrogen through the decomposition of biomethane. However, economics process are not well studied and understood, especially in cases where solid carbons also produced, which have detrimental effect on performance catalysts. The scale, as product diversification biogas plant other value-added carbons, plays crucial role determining fea...

We describe a new species of marsupial frog, genus Gastrotheca , using morphological characters and molecular data as lines evidence. The was discovered in the páramo ecotone between humid montane forest Cordillera de Colán, at elevations 3136 3179 m a.s.l., northeastern Peru. is distinguished from all its congeners by combination following characters: coarsely granular skin on dorsum, green do...