Growth curves

Water as an impurity accelerates the oxidation rate. Figure 4 compares growth curves for Si02 under dry and steam conditions. Halogens can also be introduced to the oxidation process, thereby reducing sodium ion contamination. This improves dielectric breakdown strength, and reduces interface trap density (15). 

Fig. 10. The growth of (o) zeohte X and ( ) zeohte B (46). Prenucleation or seeding of zeohte X moves the growth curve to the left.

The death rate coefficient is usually relatively small unless inhibitoiy substances accumulate, so Eq. (24-10) shows an exponential rise until S becomes depleted to reduce [L. This explains the usual growth curve (Fig. 24-21) with its lag phase, logarithmic phase, resting phase, and declining phase as the effect of takes over. 

Growth curve Graphical representation of the growth of an organism in nutrient medium in a batch reactor under predetermined environmental conditions. 

The concentration Cz is a sigmoid function ( growth curve ) of time. Presumably some of product Z must be present at r = 0 in order to initiate the reaction. 

An initial sigmoid growth curve during nucleation. 

A logarithmic growth curve when cavities acted as diffusion barriers. 

Fig. 8.59 Features of a corrosion fatigue crack growth curve...

The volume of reactor without beads was 1.4 1. The column was loaded with the solidified uniform beads of S. cerevisiae. The void volume of the reactor was 660 ml when it was packed with immobilised beads. The growth of beads with different proportions of column packing is shown in Figure 8.9. A fresh feed of 10 g l 1 glucose solution was pumped from the bottom of the reactor. The optimum amount of packing obtained was 65-70% of the reactor volume. The trend of the collected data resembles the growth curve of yeast in... 

Place the flask in a temperature-controlled shaker at 37 °C. The exponential growth phase will last from 2 to 24 hours after inoculation. The exact time and duration depend on the physiological condition of the inoculum. The data in Table 10.1 are plotted and a growth curve will be obtained for an exponentially growing culture. Figure 10.2 shows the typical growth curve obtained for a viable organism. 

Measure the optical cell density of S. cerevisiae at a wavelength of 520 nm. Try to collect data based on information required in Table 10.1. Draw a growth curve based on incubation time and cell dry weight. The cell concentration is an indication of microorganism growth. A standard calibration curve is needed before any actual experiment. 

Fig. 11.3. Batch growth curve with various phases.

Antineoplastic Agents. Figure 2 Growth curve of tumor cells according to Gompertz. 

Fig. 4. a) Inhibition of microbial growth by GA, from Bacillus subtilis. Micrococcus luteus and Pseudomonas aeruginosa, b) Growth curve of Bacillus subtilis at 32 ° C ( ) Milk, (O) milk with addedGA47pM. 

Fig. 5. Growth curve and PHAs production during batch fermentation of sweet sorghum by Bacillus arybhattai in 3 L fermentor (Tanamool et al., 2011)...

The focus on productivity in growing systems requires a time component in the study of ecosystem responses. The response of productivity to stress must therefore be considered in three dimensions (Fig. 6). This figure illustrates the effects of a stress at any particular time on the classic sigmoid curve of growth (productivity). Positive production will occur only if the stress is less than the ultimate stress and the residual strain (permanent productivity reduction) will be seen as a lowering of the growth curve below the upper boundary (the z dimension in Fig. 6). 

Figure 3.2 Example of Gompertz growth curve for parameter value 6 = (0.4, 0.04, 0.3). ...

Figure 3.3 Approximations of the Gompertz growth curve based on Taylor expansion for the internal exponential term.

Figure 1 Growth curve ofH. pluvialis at different superficial gas velocities (Ug=0.4,2, 2.5, 3 cm s" ) in 3L airlift bioreactor (Aa/Ar=3.2).

Fig. 1.12 Typical bacterial growth curve A, lag phase B, log phase C, stationary phase D, phase of decline.

Changes in the population of viable bacteria in an environment are determined by means of a viable count, and aplot of this count against time gives a dynamic picture of any pattern of change (see Fig. 11.1, curve A). The typical growth curve of a bacterial culture is constructed from data obtained in this w. The pattern of bacterial death in a lethal environment m be obtained by the same technique, when a death or mortality curve is obtained (Fig. 11.1, curve C). 

Candida boidinii was cultured at pH 3.51, 5.49 and 7.01, respectively. Czapek s Dox medium with citrus pectin (GENU Pectin, Denmark), sodium pectate or citrus pectin with 20% of D-galactopyranuronic acid (Fluka, Switzerland) as a carbon source were used. The growth curves were performed by measuring the optical density (OD) at 660 nm. 

Figure 3.23. Plots of the Raman band integration of the strong 1550-1600 cm feature associated with the first species in the 342nm ps-KTR spectra (open squares and circles) and the strong 1630 cm region feature associated with the second species in the 400 nm ps-KTR spectra (solid squares and circles). Data are shown for ps-KTR spectra obtained in 25% water/75% acetonitrile (squares) and 50% water/50% acetonitrile solvent (circles) systems. The lines present best-fit exponential decay and growth curves to the data. (Reprinted with permission from reference [25]. Copyright (2004) American Chemical Society.)...

FIGURE 85-2. The Gompertzian growth curve demonstrating symptoms and treatments versus tumor volume. (From Buick RN. Cellular basis of chemotherapy. In Dorr RT, Von Hoff DD, (eds.) Cancer Chemotherapy Handbook. 2nd ed. New York Elsevier 1994 3-14.)... 

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