نتایج جستجو برای: ultraviolet spectrophotometer source
تعداد نتایج: 461685 فیلتر نتایج به سال:
Up-Conversion Luminescence Feng Liu, Jiahua Zhang and co-workers explore an innovative way of using visible light for disinfection application by introducing a transmissive remote phosphor-converted source phosphor composite film, which gives ultraviolet-C emission upon excitation with blue lasers. More information can be found in article number 2200106.
Vacuum ultraviolet (VUV) light at 118 nm has been shown to be a powerful tool ionize molecules for various gas-phase chemical studies. A convenient table top source of can produced by frequency tripling 355 from Nd:YAG laser in xenon gas. This process low efficiency, typically producing only nJ/pulse VUV light. Simple models the predict power should increase quadratically with increasing pressu...
A series of experiments is described which were conducted to measure the absolute spectral irradiances laser plasmas created from metal targets over wavelength region 123–164 nm by two separate 1.0 μm lasers, i.e., using 100 Hz, 10 ns, 2–20 kHz, 60–100 ns full-width-at-half-maximum pulses. maximum radiation conversion efficiency ≈3%/2πsr measured a ≈125 160 nm. developed collisional-radiative s...
Abstract Background and objectives: In this research, the formation of chitosan-TiO2 nanocomposite and its antibacterial effect on Escherichia coli and staphylococcus aureus was investigated Material and Methods: to study the results, we used Scanning electron microscopy (SEM) and transition electron microscopy (TEM) images, infrared (IR) spectroscopy and ultraviolet-visible. Optical Density (O...
A considerable interest is growing worldwide about the photobiological effects of the ultraviolet radiation; in fact, it has been demonstrated that ultraviolet radiation can affect both human health as well as the equilibrium of entire ecosystems. The relative effectiveness of ultraviolet radiation at a particular wavelength in producing a specific biological response is defined by an action sp...
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