Laser fight

In a typical experiment, linearly polarized pulsed laser fight of frequency co strikes the electrode snrface at an angle 9 from the snrface normal. The harmonic light of frequency 2co generated at or near the angle of specnlar reflection is analyzed... 

In principle, intrachain contraction should occur before interchain association as long as the solution is sufficiently dilute. The limitation is the sensitivity of our detection in laser fight scattering. Note that in Fig. 27,... 

Muller et al. [53] prepared similar PMMA-g-PMMA by radical copolymerization of MMA with methacrylate-terminated PMMA macromonomer, 29, and characterized the samples by SEC-multiangle laser fight scattering (MALLS). The power law exponent, a, in the equation, 1/2°cMa, was found to be 0.36. In remarkable contrast to the result of Ward et al. [51], the shrinking factor decreased with increase of MW. This may imply that the difference in graft copolymerization method, anionic or radical, results in the graft copolymers with very different branch distribution. 

MALLS multiple angle laser fight scattering... 

The question is how radiation from therapeutic lasers and LEDs works at the cellular and organism level and what the optimal light parameters are for different uses of these light sources. It has been suggested [24] that coherent properties of laser fight are not manifested at the molecular level by light interaction with biotissue. Some additional (therapeutic) effects from coherent and polarized radiation... 

Laser fight scattering was described by one of us (2) for measuring the phase structure of an MBAS plastic as a function of graft rubber concentration. The data were analyzed with the Debye-Bueche expression (I, 2)... 

If the (averaged) power density of the laser was below about 30 pW pm no transition of a-S to p-S could he induced. Then, a-S was observable up to 15 GPa, the maximum pressure in the experiments, even if the laser fight was of relatively high energy (488 nm) [205]. 

A laser (fight amplification by stimulated emission of radiation) provides a coherent (in-phase) nearly monochromatic source of high-intensity light. Lasers are used in eye surgery, CD/DVD players, basic research, etc. Some modern dye lasers can be tuned to emit a desired wavelength. Fill in the blanks in the following table of the properties of some common lasers ... 

Kim, H.W. and Choi, M. (2003). In situ line measurement of mean aggregate size and fractal dimension along the flame axis by planar laser fight scattering. J. Aerosol Sci., 34,1633-1645. 

In early mass spectrometry applications of lasers, the sample was irradiated directly by a laser beam to desorb intact sample-related ions [27]. In this direct mode, termed laser desorption/ionization (LDI), the extent of energy transfer is, however, difficult to control and often leads to excessive thermal degradation. Also, not all compounds absorb radiation at the laser wavelength and thus are not amenable to LDI. Only those compounds that have mass below 1000 Da can be analyzed by LDI. Analytical sensitivity is also poor. A key contribution of LDI experiments is the observation that the desorption efficiency of amino acids and peptides that absorb the laser fight beam is greater than those without the chromophore [28]. IR lasers (e.g., an Nd YAG laser at 1.06 p m and a pulsed CO2 laser at 10.6 pm) and UV lasers (frequency-quadrapled Nd YAG laser at 266 nm) have aU been used. The detection of malaria parasites in blood by LDI with an N2 laser has been demonstrated [29]. 

Laser Doppler anemometry A velocity measurement device using the principle of Doppler shifted frequency of laser fight by particles moving with the fluid. 

The term laser is an acronym for Light Amplification by Stimulated Emission of Radiation. Light can be produced by atomic processes that generate laser fight. A laser consists of an optical cavity, a pumping system, and an appropriate lasing medium. It is a form of nonionizing radiation. 

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