* The work is supported by the U.S. Department of Energy, Office of Basic Energy Sciences under contract No. W-31-109-ENG-38. † [email protected] Abstract The property of the TiN/vacuum interface in ultrahigh vacuum and under electron beam irradiation is studied using Auger electron spectroscopy. About one monolayer of oxygen adsorbs on the surface and metal oxidation occurs. The characteristi...

Nanocomposite of Ag/TiO2 and nanocrystalline TiO2 were prepared by using TiCl4 as a precursor in a simple sol-gel process. The prepared photo-catalysts were characterized by X-ray diffraction (XRD), scanning electron micrographs (SEM), energy dispersive X-ray microanalysis (EDX), transmission electron microscopy (TEM) and diffuse reflectance spectroscopy (DRS). A complete and effective photocat...

The photocatalytic degradation of Acid Red 91 (AR91) and Acid Yellow 23 (AY23) with different molecular structures and different substitute groups using Pt modified TiO2 (PtTiO2 ) nanoparticles was investigated in the presence of visible light irradiation. Pt-TiO2 nanoparticles were prepared with photodiposition method (PD) and characterized by X-ray diffraction (XRD), scanning electron microgr...

Aromatic aldehydes bearing electron-donating groups are easily converted into their respective nitriles using NH(2)OH.HCl and TiO(2) under microwave irradiation, while those bearing an electron-withdrawing group give the corresponding oximes.

Native and cross-linked rat tail tendon collagen was irradiated with high energy electrons up to a maximum dose of 100 x io J kg" (100 Mrd). Fibres irradiated dry showed greater damage when examined in the electron microscope using negative staining techniques than those irradiated wet. Cross-linking with glutaraldehyde prior to irradiation resulted in the band structure being preserved even at...

BACKGROUND Genetic factors account for the majority of differences in skin color and hair morphology across human populations. Although many studies have been conducted to examine differences in skin color across populations, few studies have examined differences in hair morphology. OBJECTIVE To investigate changing of integral hair lipids after ultraviolet (UV) irradiation in three human eth...

Dynamic nuclear polarization is typically explained either using microscopic systems, such as in the solid effect and cross effect mechanisms, or using the macroscopic formalism of spin temperature which assumes that the state of the electrons can be described using temperature coefficients, giving rise to the thermal mixing mechanism. The distinction between these mechanisms is typically made ...

In this study, a comparison of the effects of neutron and electron irradiation of aqueous DNA solutions was investigated to characterize potential neutron signatures in DNA damage induction. Ionizing radiation generates numerous lesions in DNA, including base and sugar lesions, lesions involving base-sugar combinations (e.g. 8,5'-cyclopurine-2'-deoxynucleosides) and DNA-protein cross-links, as ...

Highly energetic ions traversing a two-dimensional material such as graphene produce strong electronic excitations. Electrons excited to energy states above the work function can give rise secondary electron emission, reducing amount of that remains after ion impact. either be emitted (kinetic transfer) or captured by passing (potential transfer). To elucidate this behavior is absent in three-d...