Such a shell observed as a ring, or halo, if the specimen is cleaved along a plane passing through the sphere is believed to represent a region in which the crystal structure has been modified by the absorption of the energy of alpha particles emitted by the radioactive elements.
In this medium, the degradation after one year and a half (18 months) shows that although the chemical structure has been modified, the layers become more fragile but maintain their consistency.
Based on this result, the μ-gas sensor structure has been modified to keep the sensor device at the high temperature homogeneously, and the sensor lifetime has successfully been increased by more than 5 years.
Sodium tantalate (NaTaO3), a typical mixed metal oxide with orthorhombic structure, has been modified by incorporation of lanthana (LaxNa(1 − x)TaO(3 + y) or LNTO), followed by doping/co-doping with N and Fe3+, with the objective of improving visible light absorption and photo physical properties.
Floral structure has been modified by selecting for mutations of AGAMOUS (AG), a transcription factor that regulates floral organ identity.
Strontium titanates, SrTiO3, Sr3Ti2O7 and Sr4Ti3O10, with perovskite structure, have been modified by co-doping with N, S and Fe and characterized by X-ray diffraction (XRD), Diffuse reflectance Spectroscopy (DRS), Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDXA), X-ray Photoelectron Spectroscopy (XPS) and Photo Luminescence Spectroscopy (PLS) techniques.
The characteristic appearance created by low massive structures has been modified somewhat by the erection of steel and concrete multistoried hotels and office and apartment buildings of modern design.
Yet, there is little empirical data on the extent to which habitat structures have been modified in urban landscapes.
Farm structures have been modified substantially, and the number of holdings have been greatly reduced since 1955, numerous small farms disappearing.
Pore structures have been modified by altering activation time, temperature and KOH/carbon mass ratio.
