In the MEG II experiment, Multi-Pixel Photon Counters (MPPC) sensitive to vacuum ultraviolet (VUV) light are used in liquid xenon gamma-ray detector under a high-intensity muon beam environment. commissioning phase of with beam, significant degradation Detection Efficiency (PDE) for VUV was observed, while PDE visible much less significant. This wavelength dependence damage level suggests that ...

     A special type of silica-based columns has been recently introduced into the market which is called narrow-bore columns. They have lower internal volume than the standard high-performance liquid chromatography (HPLC) columns and thus reduce the solvent consumption by almost 80%.    A simple, accurate and environmentally friendly reversed phase- HPLC (RP-HPLC method) which could be used in ...

ezetimide belongs to a class of lipid lowering compounds that selectively inhibits intestinal absorption of cholesterol and related phytosterols. the purpose of this study is to establish a reliable and quick method for the assignment of ezetimibe in tablets form by high performance liquid chromatography with ultraviolet detection (hplc-uv). a rapid and sensitive hplc method has been developed ...

tolterodine tartrate, is a new, potent and competitive muscarinic receptor antagonist in clinical development for the treatment of urge incontinence and other symptoms of unstable bladder. the purpose of this study is to establish a reliable and quick method for the assignment of tolterodine tartrate by high performance liquid chromatography with ultraviolet detection (hplc-uv). a rapid and sen...

ultraviolet waves, because of their short wavelength, have a high energy and considerable damaging effects on surfaces. protection against ultraviolet radiations is one of the finishing treatments done on surfaces exposed to sunlight. the importance of this issue in relation to human health, due to complications such as skin burns and cancer, is doubled. up to now, different materials such as z...

Abstract To increase the light collection efficiency of a liquid Ar (LAr) detector, we optimized evaporation technique tetraphenyl butadiene (TPB) on detector surface and tested operability silicon photomultiplier (SiPM), namely, multi-pixel photon counter with through-silicon-via (TSV–MPPC, Hamamatsu Photonics K.K.) at LAr temperature. TPB converts scintillations (vacuum ultraviolet light) to ...

chemical methods ( actinometry ) depend on the measurement of the extent to which a chemical reaction occurs under the influence of uv light. two chemical actinometers have been used in this research. in one method, the mixtures of potassium peroxidisuiphate butanol solutions were irradiated for various time intervals, and ph-changes were determined. a linear relationship was observed between t...