Polarization polariability

PoLar-licht, n. aurora polaris. -rohre, /. electrode tube, -stem, m. poleatar, -winkel, m. polar angle. 

Polarization phenomena are expressed by the polarization, P, which denotes the contribution by matter compared with that of vacuum. The electric field and the polari-... 

With the experimental geometry shown in Fig. 1 for an. v-polarized or p-polari/cd probe beam, the first-order approximations of index modulation due... 

In the / -spectrum of the ZnO thin film, a similar plateau as in the 3 -spectrum of the ZnO bulk sample is present. However, the phonon modes of the sapphire substrate introduce additional features, for example atw 510, 630, and "-900 cm 1 [38,123]. The spectral feature at w 610 cm-1 is called the Berreman resonance, which is related to the excitation of surface polari-tons of transverse magnetic character at the boundary of two media [73]. In the spectral region of the Berreman resonance, IRSE provides high sensitivity to the A (LO)-mode parameters. For (OOOl)-oriented surfaces of crystals with wurtzite structure, linear-polarization-dependent spectroscopic... 

Experiments to measure the electric field and water polarization within 10 A of the surface are difficult to perform. However, recent Molecular Dynamics simulations carried out by Faraudo and Bresme for water between two sodium dodecyl sulfate layers revealed oscillatory behaviors for both the polarization and the electric fields near the surface, and non-proportionality between them [Faraudo, J. Bresme, F. Phys. Rev. Lett. 2004, 92, 236102], Our polari-... 

An exception to this statement would be viewing glass through polarized light, which provides excellent visualization of strains within glass. However, this requires special equipment (polari-scope), and the glassware must be in a particular orientation with respect to the equipment. 

Dickson says that she also wanted to do something adventurous. She wanted to travel and live in different cultures. As a summer student, Dickson worked at a Chilean copper mine. Her current job with Cominco involves frequent travel to various mines. "Every day provides a new challenge," Dickson says. When she is at Polaris, Dickson enjoys polar bear sightings on the tundra. 

When a beam of plane-polari/ed li fht passes through u Solution of ocr tain organic molecules, the plmtc of polarization is rotated. Compounds that exhibit this behavior are called optically active. Optical activity is dua to the asymmetric structure of the rrmlecules themselves. I... 

When viewed at a given time t = /q as a function of distance along x, the position of the endpoint of the electric vector of linearly polarized light oscillates in a plane (cf. Figure l.2a), whereas for circularly polarized light it forms a helix of constant pitch. The helix is right-handed if the light polari-... 

Figure 4 LC/MS/MS of a mixture of gabapentin and naproxen using polarity switching. Micromass Quattro II, electrospray ionization rat plasma sample prepared by protein precipitation/extraction using a MetaChem 4.6 X 30-mm Polaris column with 3- Xm packing with a MetaChem 2000-MG2 guard column. Flow rate = 2.0 mL/min split 1 10 to MS. Injection volume 10 uL step gradient 100% 0.1% acetic acid, 0—1.0 min 70/30 0.1% acetic acid/acetoni-trile, 1.0—1.5 min 100% acetonitrile, 1.5—2.0 min. (Courtesy of Laura F. Polchinski, Ion Ebright, and Scott T. Fountain, personal communication.)...

Ellipsometry is a technique that uses polari/.ed light to probe the dielectric properties of samples.- It is most commonly applied to the analysis of very thin films on surfaces. In ellipsometry, a polarized incident beam, often from a laser, is reflected from the film, and the reflected light is analyzed to determine a change in the state of polarization. The change in the amplitude and the phase of the reflected light are then related to properties such as film refractive index, absorptivity, optical anisotropy, and thickness. 

P is the polarization per unit volume and a is the polariability of the volume element of volume, v. 

Polar po-l9r [NL polaris, fr. L polus pole] (1551) adj. Molecule or radical that has, or is capable of developing, electrical charges. Thus, polar molecules ionize in solution and impart electrical conductivity. Water, alcohol, and sulfuric acid are polar in nature most hydrocarbon liquids are not. Carboxyl and hydroxyl often exhibit an electrical charge. The formation of emulsions and the action of detergents are dependent on this behavior. 

Polarizability ip6-l9- rl-z9- bi-b-te [F pola-riser, fr. NL polaris polar] (1811) n. The ease by which the particles of a substance... 

GERISCHER In case of chemisorption of ions, the pure electrostatic picture breaks down in explaining the differential capacities. While in electrolytes with solvation of the ions, there is a possibility that the ion approaches closer to the electrode surface under the influence of chemisorptive forces by leaving its solvation shell, it has been shown even there that in most systems the chemisorbed ions are partially discharged [Vetter and Schultze]. This means in my opinion that "chemisorbed ions" can better be described as chemisorbed atoms with a polar bond to the surface. The polari-... 

F. 2 5 (a) Polarization ciffve for the electrodeposition of Co powder after IR drop correction (/tot), polarization curve for hydrogen evolutirai (/h), and polari-zatirai enrve fin Co powder electrodeposition (jco) after subtraction of the current density fin hydrogen evolution, (b) Polarization curve fin Co powder electrode-position (jco) und corresptmding current efficiency curve (jjj) (Reprinted limn [90, 91] with the permission of Elsevier.)... 

If polar and apolar interactions are necessary for separation (e.g., components with amino and acidic groups), phases may be encountered that show sufficient hydrophobicity but which are also capable of polar interactions because of additional polar groups on the surface, e.g., Spherisorb ODS 2, LiChrospher, Polaris C18-A, Ascends RP-Amide, Purosphere, Uptisphere UP5MM, Nucleodur Sphinx RP, Atlantis d Cjg, SynergiFUSION RP, and Acclaim PA. The fine adjusting for a better selectivity can be most effectively achieved by means of the pH of the eluent and by variation of the acid/base used [8]. A possible lack of robustness of the method has to be accepted in such systems. 

Those possessing enhanced shape-selectivity (oCjyo) reduced retention (fepg), as typified by polar embedded phases, e.g., Suplex pkj, 100, HyPURITY ADVANCE, Polaris Amide Cjg, BetaMax Acidic (column nos. 100, 46, 76, and 9, respectively) - group C. 

Fig. 12. Differences in stationary phase seiectivity on the analysis of degraded Ketoprofen using identical chromatographic conditions. Note the change in elution order for peaks marked (A) and (B) on the polar embedded phase - Polaris Amide Cl8.

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