Reticular spacing

For powder samples, the well-known Dehye-Scherrer technique is used. This method gives all the reticular spacings hut no information about the spacial orientation of these planes. Powder data are useful for determining relative intensities where it may be preferable to study a good powder specimen rather than a poor monodomain. ... 

With EMLA, liposoluble anesthetic molecules penetrate the stratum comeum and the rest of the epidermal barrier and soon reach the skin nerve endings. The phenol, which is also liposoluble, can get through the epidermis more quickly. On the surface the shorter contact time between the epidermis and the phenol could reduce epidermal liquefaction. Deep down, a higher concentration of phenol in the reticular dermis could cause the formation of retractile scar tissue. The concentration gradient created in the perivascular spaces of the dermis speeds up the absorption of phenol. The risk of systemic toxicity can also increase. EMLA causes vasoconstriction followed by vasodilation. Vasodilation can sometimes be seen after only 30 minutes of EMLA under occlusion. How will these vasomotor changes affect the effectiveness or absorption of phenol - and therefore its toxicity ... 

Heart failure causes Kerley s B lines (edema of interlobular septa), which appear as thin, horizontal reticular fines in the costophrenic angles. At higher pressures, alveolar edema and pleural effusions appear in the pleural space or as blunting of the costophrenic angles. Pericardial effusions also may appear as a large heart, but because it usually occurs rapidly, there is no evidence of pulmonary venous congestion. 

Being semimetals, Bi and Sb show anomalies in the correlation of Ea=o with the surface atomic density [15, 16, 22], explained in terms of face-specific space charge effects. However, the definite dependence of Ea=o on the reticular density of plane has been established in a good agreement with general tendency. 

Reticular area is the projection of the unit cell on to a surface plane and can effectively be thought of as the 2D unit cell at the surface. Reticular area (S ) is calculated fiom the ratio of the unit cell volume (F ) to the d-spacing (d ) as shown in Equation 8.1. The concept will be utilised later whai describing the surfaces of particles. 

---