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According to the Beer-Lambert Law, the optical density at the fixed wavelength is proportional to the absorption coefficient of chemical compositions of bacteria.
luminyensis on DMA, the organism was grown in the presence of 37.5 mM DMA + [H.sub.2] and the optical density, as well as the DMA concentration in the medium were monitored over time (Figure 3(b)).
Table 1: The average optical density of collagen type I, MMP2, and MMP9 in the cornea for the two groups at six time points (IOD/area).
We will then determine optimal optical density cut-offs by receiver operating characteristics, at which point the assay will be available for field-testing.
The mean optical density values of MMP-2 and MMP-9 were also higher in protruding type lesions than in indented type lesions.
The recorded time for the stationary phase in the presence of metal cholates were within the range 20 - 55 minute, a value less than half that in their absence, while the observed optical density in presence of metal cholates is ten times lower than that for the free bacteria.
The mixture was thoroughly mixed and after 30 minutes the necessary measuring were conducted to determine optical density ([alpha]).
The impact of a small amount of hyperbranched BPG on the printing ink color was examined by studying the optical density of a full-tone area, the total color difference, [DELTA][E.sub.ab.sup.*], and the gloss of the dried ink film.
Optical density in the TH positive cells in the isoflavone group was higher than in the control (0.46 [+ or -] 0.06 versus 0.22 [+ or -] 0.07, P < 0.05), the isoflavone + [MPP.sup.+] (0.24 [+ or -] 0.04, P < 0.05), and the [MPP.sup.+] only group (0.10 [+ or -] 0.03, P < 0.05).
To measure the concentration of KMn[O.sub.4] in a given sample, concept of spectrophotometer and optical density (OD), as applied in biochemistry, is used.
To elaborate, macular pigment optical density (MPOD) can be measured using a variety of devices.

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