Cell parameters, various

Clinical chemistry analy2ets ate automated instmments used for measuring concentrations of the various chemical constituents of blood or other body fluids. For a discussion of the related category of instmments used for the measurement of blood cell parameters, see Automated instruments, HEMATOLOGY. 

Table 1. Comparison of the cell parameters of various cells [4]...

Zhao F, Virkar AV. Dependence of polarization in anode-supported solid oxide fuel cells on various cell parameters. J Power Sources 2005 141 79-95. 

Preliminary X-ray investigations have been followed by several detailed crystal structure determinations of various sulfur-selenium phases with ring sizes of eight and twelve. The unit cell parameters of the eight-membered species are given in Table 1. The unit cell parameters of monoclinic y-sulfur and of monoclinic a-selenium are included for comparison. 

Tab. 3.1 Statistical parameters for relationships between structural Al and unit cell parameters of various Fe " oxides.

Table 1. Crystal cell parameters for various salts of 2a". 

Fig. 38. A comparison of the observed and calculated (Sect. 3.3) unit cell parameters for various garnets...

Chemisorption is the process by which various ions are adsorbed on the semiconductor surface with the formation of a chemical bond and can affect a number of important cell parameters. 

In this case, the operating temperature of the fuel cell (used in the Nemst potential, and overpotential calculations) is assumed to be the outlet cathode gas temperature. Initial fuel cell parameters used in the various simulations are summarized in Table 8.5. 

On the first stage of hydrogenation reaction the C/H composition of fulleranes can be approximately determined by XRD from increase of unit cell parameter. The crystal structure of fulleranes powder remains to be fee like in pristine C60 but the cell parameter increases proportionally to the number of attached hydrogen atoms due to increase of van der Waals diameter of molecules. Using chemical analysis on carbon/hydrogen ratio performed on samples hydrogenated at various conditions we constructed the dependence which could be used for approximate evaluation of hydrogen content from known cell parameter determined from powder XRD, see Fig. 5.3... 

Tazi, B. Savadogo, 0., Effect of Various Heteropolyacids (HPAs) on the Characteristics of Nafion HPAS Membranes and their H2 /02 Polymer Electrolyte Fuel Cell Parameters. Journal of New Materials for Electrochemical Systems 2001, A, (3), 187-196. 

For consistency, pseudopotentials should be based on the same functionals as used for the valence states. This point has been illustrated by Gale and coworkers in their study of aluminum trihydroxides [47]. Table 8.3 compares their results of cell optimizations using various mixtures of psuedopotential and valence state functionals with the experimental structure of gibbsite [48]. LDA pseudopotentials in an LDA optimization of the cell gives underestimated cell parameters, consistent with the usual expectation that LDA gives over-binding in chemical bonds. 

Single crystal surfaces are associated with planes in the unit cells pictured in Figure 5.1.2 and are denoted by indices related to the unit cell parameters. Several examples of various low-index surface planes are shown in Figure 5.1,3 for the face-centered cubic structure. 

At present, there are at least two approaches to the investigation of the cellular structure of foamed polymers. In the first one, which may formally be called a graphical approach, attempts are made to draw conclusions on the macroscopic properties of foamed polymers from morphological parameters such as the geometry and stereometry of cells of various sizes, shapes and types. The second approach, which may be referred to as physicochemical, attempts to explain and predict polymer morphology from the data on the chemical composition of the polymer matrix and the mechanisms of foaming... 

B. Tazi and O. Savadogo. Effect of various heteropolyacids (HPAs) on the characteristics of Nafion(R)—HP AS membranes and their H-2/0-2 polymer electrol3de fuel cell parameters. Journal of New Materials for Electrochemical Systems 4, 187-196 2001. 

As can be seen, the program prompts the user for the various unit cell parameters. At nearly any point, a "question mark" may be typed, and CAMSEQ/M will highlight the appropriate information on the screen to assist the user in determining what he should do. 

---