55 research outputs found
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Improving perimetric examination of the macular visual field using structural information
Get PDFLong-term recovery from unawareness, deficient counterregulation and lack of cognitive dysfunction during hypoglycaemia, following institution of rational, intensive insulin therapy in IDDM
Full text linkChemInform Abstract: Conformational Effects on the Excited State 1,2-Hydrogen Migration in Alkyldiazomethanes.
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ChemInform Abstract: Interception of Dimethylcarbene with Pyridine: A Laser Flash Photolysis Study
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ChemInform Abstract: Convenient Unimolecular Sources of Aryloxyl Radicals. Part 1. Aryloxyoxalyl Chlorides.
Full text linkUV-Absorption and Silica/Titania Colloids Using a Core--Shell Approach
No full textMetal-oxo-colloids have been prepared using tetraethoxysilane (TEOS) oligomers with titanium tetra-i-propoxide (TIP) or titanium (di-i-propoxide) bis(acetylacetonate) (TIA) precursors. Transmission electron microscopy (TEM), FTIR, UV-Vis, and photoluminescence spectroscopy were used to investigate the composition, the size, and optical properties of the Si/Ti core–shell colloids. The presence of hetero-bonded silicate structure (Si–O–Ti) was indicated by FTIR spectroscopy. The size of Si/TIP system ranged from 55 to 120 nm and Si/TIA system ranged from 220 to 250 nm. The TEM data indicated that the size of colloids can be controlled by the TIP or TIA content. The Si/Ti system exhibited strong absorption in the UV-range, yet had excellent optical transmittance in the visible range. The Si/Ti systems exhibited a photoluminescence emission at 329 nm
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