Surface class

This is the class of all surfaces, both the RECTANGULAR ones and those which have irregular outer and possibly internal boundaries. 

ENTITY RECTANGULAR SURFACE = CLASS( ELEMENTARY SURFACE, 

RECTANGULAIC TRIMMED SURFACE, RECTANGULAR COMPOSITE SURFACE, OFFSET SURFACE )  

This is the class of all surfaces that are defined on a rectangular region of their two-dimensional (u,v)-parameter space. 

ENTITY ELEMENTARY SURFACE = CLASS( SPHERICAL SURFACE, 

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Several methods have been developed for quantifying dental fluorosis. The most commonly used method is Dean s index [49], which classifies fluorosis on a scale of 0 to 4 as follows class 0, no fluorosis class 1, very mild fluorosis (opaque white areas irregularly covering <25% of the tooth surface) class 2, mild fluorosis (white areas covering 25-50% of the tooth surface) class 3, moderate fluorosis (all surfaces affected, with some brown spots and marked wear on surfaces subject to attrition) and class 4, severe fluorosis (widespread brown stains and pitting). The average score of the two most severely affected teeth is used to derive the classification. Other commonly used methods to rate dental fluorosis include the Thylstrup-Fejerskov Index (TFI) [50] and the tooth surface... 

Hard surfaces Class, ceramics, metal, polymers Fibres Cotton, wool, polymers, glass fibres... 

Fletcher JM, Prentice HG, Grundy JE (1998) Natural killer cell lysis of cytomegalovirus (CMV)-infected cells correlates with virally induced changes in cell surface lymphocyte function-associated antigen-3 (LFA-3) expression and not with the CMV-induced down-regulation of cell surface class I HLA. J Immunol 161 2365-2374... 

As anticipated all classes (4.30) have no inversion center. Higher cuts do not add new surface classes to the above 19 ones. So, each of 90 bulk magnetic classes... 

The cholinesterase surfaces described here, as in the case of OPH, are broad spectrum. The TAC and TBC surfaces indicate only the presence of a competitive inhibitor of the enzyme and not its identity, so a positive result would be observed upon exposure to an organophosphate or carbamate pesticide, nerve agent, or drug with anti-cholinesterase activity. When the two enzymes are combined on a single surface, classes of compounds can be distinguished, that is, the surface discriminates between competitive inhibitors of AChE only, competitive inhibitors of BChE only, and competitive inhibitors of AChE and BChE. Inhibitor identification can be made by comparison of the change in absorbance at the AChE peak as compared to that for the BChE peak on the combined surface. 

When surfaces covered with irregularly shaped particles are placed in an aqueous medium, the force of adhesion is lower than it is in air. The change in median force of adhesion for irregular particles adhering to steel surfaces (Class 5 finish) when the air is replaced with water is illustrated by the following data ... 

Fig. X.8. Detachment probability as a function of air-flow velocity in detachment of loess particles with different angles of inclination of steel surface (Class 4 finish) relative to flow axis, for particles with diameter of 60-70 /xm (1, 2,3, 4) and 120-150 ixm V, 2 3, 4 ), with following angles of inclination (1, l ) 0 (2, 2 ) 20° (3, 3 ) 40° (4,4 ) 60°.

ENTITY CURVE ON SURFACE = CLASS( ELEMENTARY CURVE ON SURFACE,... 

It may well be necessary to adapt an optical inspection system to accommodate the three-dimensional layout of MID process surfaces. Class 2l D MID can be inspected without additional kinematics and adaptation of the optical inspection system. This holds true only if the process surfaces are plane-parallel in the inspection plane of the sensor array. Classes n x 2D and 3D call for changes to the AOI system if the electronic components are widely spaced. This could well mean integrating an extra handling and positioning unit for MID, for example an automated workpiece carrier. 

Within the respiratory tract, several cell types are capable (based on then-expression of surface class II MHC) of antigen presentation. These may be broadly categorized as either professional APC, which may include B cells, macrophages, and DC, or opportunistic APC, such as fibroblasts and epithelial cells, either eiliated or type II pneumonocytes. The potential for each of these populations to contribute to T-cell activation is dependent on factors such as the host s existing immune status, degree of local inflammation, and physicochemical properties of the inhaled particle or antigen. 

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