نتایج جستجو برای: nitrogen laser
تعداد نتایج: 300775 فیلتر نتایج به سال:
In 2015, Laser Focus World contributing editor Jeff Hecht commemorated the magazine’s 50th anniversary with a series of articles chronicling major technology milestones. Among the trends, it’s interesting to note that some laser technologies, such as ruby, nitrogen, and helium cadmium (HeCd), may have generated initial excitement, but at best penetrated only a few niche markets. Rather, the bul...
BACKGROUND Rapid, real-time and label-free measurement of the cellular contents of biofuel molecules such as triacylglycerol (TAG) in populations at single-cell resolution are important for bioprocess control and understanding of the population heterogeneity. Raman microspectroscopy can directly detect the changes of metabolite profile in a cell and thus can potentially serve these purposes. ...
We present a laser plasma based x-ray microscope for the water window employing a high-average power laser system for plasma generation. At 90 W laser power a brightness of 7.4 x 10(11) photons/(s x sr x μm(2)) was measured for the nitrogen Lyα line emission at 2.478 nm. Using a multilayer condenser mirror with 0.3 % reflectivity 10(6) photons/(μm(2) x s) were obtained in the object plane. Micr...
Two-photon-induced polarization spectroscopy of molecular nitrogen in the alpha 1IIg(nu' =) <-- X 1Sigma(g)+ (nu" =) system near 283 nm was performed, and its signal dependence investigated over the pressure range from 1.2 to 5 bars at 300 K. A significant increase of the signal intensity with pressure beyond the expected square law for a two-photon process was observed for pure nitrogen. Simil...
We quantitatively determine cross sections for rotational decoherence from the decay of nonadiabatic laser-induced alignment in nitrogen and nitrogen-foreign gas mixtures in a temperature range between 80 K and room temperature. The cross section for rotational decoherence in pure nitrogen decreases from 102 A(2) at 80 K to 48 A(2) at 295 K, leading to long-lived coherences even at high tempera...
High-temperature YBn2Cuj07-s thin films were patterned by a laser writing technique based on the wmperL\ture increase i n the focus of a laser beam. The corresponding local increase of the oxygen diffusion velocity can be employed to write reversibly deoxygenated (semiconducting) and reoxygenated (superconduct~ n p ) patterns. if nitrogen or oxygen, respectively, is chosen as ambient atmosphere...
هدف: این مطالعه به منظور بررسی میزان اثربخشی fractional co2 laser در درمان اسکار انجام شده است. روش مطالعه: این مطالعه به صورت یک clinical case series انجام شده است. حجم نمونه مورد بررسی شامل 81 بیمار مبتلا به اسکار بود که طی سال 1388 جهت درمان به کلینیک های درماتولوژی در سطح شهر تهران مراجعه نموده بودند.یافته ها: میانگین میزان پاسخ به درمان در هر جلسه لیزردرمانی 26/29 درصد بود. 20 نفر (7/24 د...
necessary the same systematic treatment that has been given the metabolism of bacteria, fungi, and the higher plants. The book is divided into eight chapters including an introduction and summary. There are sections on respiration, photosynthesis, the occurrence and distribution of pigments, heterotrophic nutrition, requirements for amino acids, vitamins, and other growth factors, and nitrogen ...
Mn-Ce/FA (M) and Mn-Ce/FA-TiO2 (M), using fly ash (FA) with and without TiO2 as the carriers, were prepared by an integral molding technique. With the increase of TiO2 content, the rates of NO conversion and denitration of Mn-Ce/FA-TiO2 (M) increased, and the NO2 and N2O formation rates decreased. It is found that TiO2 could effectively inhibit the excessive oxidation of NO and the generation o...
The first time-resolved x-ray/optical pump-probe experiments at the SLAC Linac Coherent Light Source (LCLS) used a combination of feedback methods and post-analysis binning techniques to synchronize an ultrafast optical laser to the linac-based x-ray laser. Transient molecular nitrogen alignment revival features were resolved in time-dependent x-ray-induced fragmentation spectra. These alignmen...
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