Second, we added exogenous copper or a copper chelator to the culture medium to vary the availability of copper.
The results showed that the expression levels of rh-bikunin were different when pH of medium varied from 4.0-7.0 4.0-7.0
Ball milling parameters, such as ball-to-powder weight ratio, type and quantity of surfactant and type of medium were varied as guided by the Taguchi design.
To evaluate the effect of initial pH of the medium on laccase production, the pH of Asther medium was varied in the range of 3.0 10.0.
The osmolarity of the medium was varied through the addition of sucrose or sodium chloride.
When the ionic strength of the medium was varied at a fixed pH, the size change of the hydrogel was gradual.
The composition of the apical exposure medium was varied by addition of artificial chyme, bile, or oleic acid at similar or increasing total contaminant concentrations.
In this study, the pH of the medium was varied by adding acetic acid or hydrochloric acid to increase the amount of CaCO3-derived carbon sources (initial pCO2), an important component in increasing the growth of Chlorella sp. The composition of the oyster shell medium affects how much CaCO3 reacts with CO2 and H2O and subsequently exists as dissolved ions, such as HCO3−, CO32−, and H2CO3.
Figure 1 Variation of dimensionless (a) velocity, (b) temperature and (c) concentration profiles across the boundary layer for different values of M. In Table 2, we observe that there is an excellent agreement between our present results with those obtained by Noor [20] as the porosity of the medium is varied.
The values of the absorption coefficient (μa) of the homogeneous medium and the bottom part of the two-layer medium were varied from 0.029 to 0.085 cm−1 in steps of 0.014 cm−1, while their reduced scattering coefficient (μs') and both optical properties of the top layer were kept constant.
